QR code creator library

25 files changed, 6184 insertions, 0 deletions

diff --git a/libs/libqrencode/src/.gitignore b/libs/libqrencode/src/.gitignore
new file mode 100644
index 0000000000..7fd2e09a78
--- /dev/null
+++ b/libs/libqrencode/src/.gitignore
@@ -0,0 +1,57 @@
+*.[oa]
+*.lo
+*.la
+*.gcno
+*.gcov
+*.gcda
+.deps/
+.libs/
+autom4te.cache/
+m4/
+CMakeLists.txt.user
+CMakeCache.txt
+CTestTestfile.cmake
+CMakeFiles/
+cmake_install.cmake
+Makefile
+Makefile.in
+README
+build
+config.log
+configure
+config.status
+config.h
+config.h.in
+aclocal.m4
+libtool
+stamp-h1
+qrencode
+qrencode.1
+libqrencode.pc
+tests/create_frame_pattern
+tests/create_mqr_frame_pattern
+tests/pthread_qrencode
+tests/prof_qrencode
+tests/test_bitstream
+tests/test_estimatebit
+tests/test_mask
+tests/test_mmask
+tests/test_monkey
+tests/test_mqrspec
+tests/test_qrencode
+tests/test_qrinput
+tests/test_qrspec
+tests/test_rs
+tests/test_split
+tests/test_split_urls
+tests/view_qrcode
+use/compile
+use/config.guess
+use/config.sub
+use/depcomp
+use/install-sh
+use/ltmain.sh
+use/missing
+html/
+massif.out.*
+gmon.out
diff --git a/libs/libqrencode/src/CMakeLists.txt b/libs/libqrencode/src/CMakeLists.txt
new file mode 100644
index 0000000000..bfc51ac224
--- /dev/null
+++ b/libs/libqrencode/src/CMakeLists.txt
@@ -0,0 +1,195 @@
+cmake_minimum_required(VERSION 3.1.0)
+
+project(QRencode VERSION 4.1.0 LANGUAGES C)
+
+option(WITH_TOOLS "Build utility tools"  YES )
+option(WITH_TESTS "Build tests"  NO )
+option(WITHOUT_PNG "Disable PNG support" NO)
+option(GPROF "Generate extra code to write profile information" OFF)
+option(COVERAGE "Generate extra code to write coverage information" OFF)
+option(ASAN "Use AddressSanitizer" OFF)
+option(BUILD_SHARED_LIBS "Enable build of shared libraries" NO)
+
+if(BUILD_TESTING)
+    set(WITH_TESTS ON)
+    message(DEPRECATION "use WITH_TESTS option instead BUILD_TESTING")
+endif()
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+
+set(CMAKE_THREAD_PREFER_PTHREAD ON)
+find_package(Threads)
+find_package(PNG)
+find_package(Iconv)
+
+if(CMAKE_USE_PTHREADS_INIT)
+    add_definitions(-DHAVE_LIBPTHREAD=1)
+    # for libqrencode.pc
+    set(LIBPTHREAD ${CMAKE_THREAD_LIBS_INIT})
+endif()
+
+## Check for system include files
+include(CheckIncludeFile)
+include(CheckFunctionExists)
+
+check_include_file(dlfcn.h    HAVE_DLFCN_H   )
+check_include_file(inttypes.h HAVE_INTTYPES_H)
+check_include_file(memory.h   HAVE_MEMORY_H  )
+check_include_file(stdint.h   HAVE_STDINT_H  )
+check_include_file(stdlib.h   HAVE_STDLIB_H  )
+check_include_file(strings.h  HAVE_STRINGS_H )
+check_include_file(string.h   HAVE_STRING_H  )
+check_include_file(getopt.h   HAVE_GETOPT_H  )
+check_include_file(sys/time.h HAVE_SYS_TIME_H)
+
+check_function_exists(strdup HAVE_STRDUP)
+
+if(HAVE_STRDUP)
+    add_definitions(-DHAVE_STRDUP=1)
+endif()
+
+if(CMAKE_COMPILER_IS_GNUCXX)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+endif()
+
+if(GPROF)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pg")
+endif()
+
+if(COVERAGE)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --coverage")
+endif()
+
+if(ASAN)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address -fno-omit-frame-pointer -fno-optimize-sibling-calls")
+endif()
+
+add_definitions(-DMAJOR_VERSION=${PROJECT_VERSION_MAJOR})
+add_definitions(-DMINOR_VERSION=${PROJECT_VERSION_MINOR})
+add_definitions(-DMICRO_VERSION=${PROJECT_VERSION_PATCH})
+add_definitions(-DVERSION="${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
+add_definitions(-DHAVE_SDL=0)
+
+if(MSVC)
+    set(CMAKE_DEBUG_POSTFIX "d")
+
+    add_definitions(-Dstrcasecmp=_stricmp)
+    add_definitions(-Dstrncasecmp=_strnicmp)
+    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+    add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
+    
+    if(WITH_TOOLS)
+        find_path(GETOPT_INCLUDE_DIR getopt.h PATH_SUFFIXES include)
+        find_library(GETOPT_LIBRARIES wingetopt PATH_SUFFIXES lib)
+        include_directories(${GETOPT_INCLUDE_DIR})
+    endif(WITH_TOOLS)
+endif(MSVC)
+
+set(QRENCODE_SRCS qrencode.c
+                  qrinput.c
+                  bitstream.c
+                  qrspec.c
+                  rsecc.c
+                  split.c
+                  mask.c
+                  mqrspec.c
+                  mmask.c)
+
+set(QRENCODE_HDRS qrencode_inner.h
+                  qrinput.h
+                  bitstream.h
+                  qrspec.h
+                  rsecc.h
+                  split.h
+                  mask.h
+                  mqrspec.h
+                  mmask.h)
+
+if(BUILD_SHARED_LIBS)
+    if(MSVC)
+        set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+    endif()
+    add_library(qrencode SHARED ${QRENCODE_SRCS} ${QRENCODE_HDRS})
+    set_target_properties(qrencode PROPERTIES VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH} SOVERSION ${PROJECT_VERSION_MAJOR})
+else()
+    add_library(qrencode ${QRENCODE_SRCS} ${QRENCODE_HDRS})
+endif()
+if(CMAKE_USE_PTHREADS_INIT)
+    target_link_libraries(qrencode Threads::Threads)
+endif()
+
+include(GNUInstallDirs)
+set(prefix "${CMAKE_INSTALL_PREFIX}")
+set(exec_prefix "${CMAKE_INSTALL_FULL_BINDIR}")
+set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
+set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
+set(VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
+
+configure_file(qrencode.1.in qrencode.1 @ONLY)
+configure_file(libqrencode.pc.in libqrencode.pc @ONLY)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/qrencode.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libqrencode.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+install(FILES qrencode.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(TARGETS qrencode DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+## Build utility tools
+if(WITH_TOOLS)
+    if(NOT WITHOUT_PNG)
+        add_definitions(-DHAVE_PNG=1)
+    endif()
+    add_executable(qrenc qrenc.c)
+    set_target_properties(qrenc PROPERTIES OUTPUT_NAME qrencode)
+
+    target_link_libraries(qrenc qrencode PNG::PNG)
+
+    if(MSVC)
+        target_link_libraries(qrenc ${GETOPT_LIBRARIES})
+    endif(MSVC)
+
+    install(TARGETS qrenc DESTINATION ${CMAKE_INSTALL_BINDIR})
+endif()
+
+if(WITH_TESTS)
+    enable_testing()
+    add_definitions(-DWITH_TESTS=)
+    add_definitions(-DSTATIC_IN_RELEASE=)
+    add_subdirectory(tests)
+else()
+    add_definitions(-DSTATIC_IN_RELEASE=static)
+endif()
+
+## ==============================================================================
+##
+##  Configuration summary
+##
+## ==============================================================================
+
+message(STATUS "------------------------------------------------------------" )
+message(STATUS "[QRencode] Configuration summary."                            )
+message(STATUS "------------------------------------------------------------ ")
+message(STATUS " System configuration:"                                       )
+message(STATUS " .. Processor type .............. = ${CMAKE_SYSTEM_PROCESSOR}")
+message(STATUS " .. CMake executable ............ = ${CMAKE_COMMAND}"         )
+message(STATUS " .. CMake version ............... = ${CMAKE_VERSION}"         )
+message(STATUS " .. System name ................. = ${CMAKE_SYSTEM}"          )
+message(STATUS " .. C++ compiler ................ = ${CMAKE_CXX_COMPILER}"    )
+message(STATUS " .. C compiler .................. = ${CMAKE_C_COMPILER}"      )
+message(STATUS " .. size(void*) ................. = ${CMAKE_SIZEOF_VOID_P}"   )
+message(STATUS " Dependencies:"                                               )
+#message(STATUS " .. Doxygen ..................... = ${DOXYGEN_EXECUTABLE}"    )
+message(STATUS " .. Thread library of the system  = ${CMAKE_THREAD_LIBS_INIT}")
+message(STATUS " .. Iconv ....................... = ${ICONV_FOUND}"           )
+message(STATUS " .... Iconv includes ............ = ${ICONV_INCLUDE_DIR}"     )
+message(STATUS " .... Iconv library ............. = ${ICONV_LIBRARIES}"       )
+message(STATUS " .. ZLIB ........................ = ${ZLIB_FOUND}"            )
+message(STATUS " .. PNG ......................... = ${PNG_FOUND}"             )
+message(STATUS " .... PNG includes .............. = ${PNG_INCLUDE_DIR}"       )
+message(STATUS " .... PNG library ............... = ${PNG_LIBRARIES}"         )
+#message(STATUS " .. Memory checker .............. = ${MEMORYCHECK_COMMAND}"   )
+message(STATUS " Project configuration:"                                      )
+message(STATUS " .. Build test programs  ........ = ${WITH_TESTS}"            )
+message(STATUS " .. Build utility tools  ........ = ${WITH_TOOLS}"            )
+message(STATUS " .. Disable PNG support  ........ = ${WITHOUT_PNG}"           )
+message(STATUS " .. Installation prefix ......... = ${CMAKE_INSTALL_PREFIX}"  )
+message(STATUS "------------------------------------------------------------ ")
diff --git a/libs/libqrencode/src/bitstream.c b/libs/libqrencode/src/bitstream.c
new file mode 100644
index 0000000000..f620050dc6
--- /dev/null
+++ b/libs/libqrencode/src/bitstream.c
@@ -0,0 +1,231 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Binary sequence class.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "bitstream.h"
+
+#define DEFAULT_BUFSIZE (128)
+
+BitStream *BitStream_new(void)
+{
+	BitStream *bstream;
+
+	bstream = (BitStream *)malloc(sizeof(BitStream));
+	if(bstream == NULL) return NULL;
+
+	bstream->length = 0;
+	bstream->data = (unsigned char *)malloc(DEFAULT_BUFSIZE);
+	if(bstream->data == NULL) {
+		free(bstream);
+		return NULL;
+	}
+	bstream->datasize = DEFAULT_BUFSIZE;
+
+	return bstream;
+}
+
+#ifdef WITH_TESTS
+BitStream *BitStream_newWithBits(size_t size, unsigned char *bits)
+{
+	BitStream *bstream;
+
+	if(size == 0) return BitStream_new();
+
+	bstream = (BitStream *)malloc(sizeof(BitStream));
+	if(bstream == NULL) return NULL;
+
+	bstream->data = (unsigned char *)malloc(size);
+	if(bstream->data == NULL) {
+		free(bstream);
+		return NULL;
+	}
+
+	bstream->length = size;
+	bstream->datasize = size;
+	memcpy(bstream->data, bits, size);
+
+	return bstream;
+}
+#endif
+
+static int BitStream_expand(BitStream *bstream)
+{
+	unsigned char *data;
+
+	data = (unsigned char *)realloc(bstream->data, bstream->datasize * 2);
+	if(data == NULL) {
+		return -1;
+	}
+
+	bstream->data = data;
+	bstream->datasize *= 2;
+
+	return 0;
+}
+
+static void BitStream_writeNum(unsigned char *dest, size_t bits, unsigned int num)
+{
+	unsigned int mask;
+	size_t i;
+	unsigned char *p;
+
+	p = dest;
+	mask = 1U << (bits - 1);
+	for(i = 0; i < bits; i++) {
+		if(num & mask) {
+			*p = 1;
+		} else {
+			*p = 0;
+		}
+		p++;
+		mask = mask >> 1;
+	}
+}
+
+static void BitStream_writeBytes(unsigned char *dest, size_t size, unsigned char *data)
+{
+	unsigned char mask;
+	size_t i, j;
+	unsigned char *p;
+
+	p = dest;
+	for(i = 0; i < size; i++) {
+		mask = 0x80;
+		for(j = 0; j < 8; j++) {
+			if(data[i] & mask) {
+				*p = 1;
+			} else {
+				*p = 0;
+			}
+			p++;
+			mask = mask >> 1;
+		}
+	}
+}
+
+int BitStream_append(BitStream *bstream, BitStream *arg)
+{
+	int ret;
+
+	if(arg == NULL) {
+		return -1;
+	}
+	if(arg->length == 0) {
+		return 0;
+	}
+
+	while(bstream->length + arg->length > bstream->datasize) {
+		ret = BitStream_expand(bstream);
+		if(ret < 0) return ret;
+	}
+
+	memcpy(bstream->data + bstream->length, arg->data, arg->length);
+	bstream->length += arg->length;
+
+	return 0;
+}
+
+int BitStream_appendNum(BitStream *bstream, size_t bits, unsigned int num)
+{
+	int ret;
+
+	if(bits == 0) return 0;
+
+	while(bstream->datasize - bstream->length < bits) {
+		ret = BitStream_expand(bstream);
+		if(ret < 0) return ret;
+	}
+	BitStream_writeNum(bstream->data + bstream->length, bits, num);
+	bstream->length += bits;
+
+	return 0;
+}
+
+int BitStream_appendBytes(BitStream *bstream, size_t size, unsigned char *data)
+{
+	int ret;
+
+	if(size == 0) return 0;
+
+	while(bstream->datasize - bstream->length < size * 8) {
+		ret = BitStream_expand(bstream);
+		if(ret < 0) return ret;
+	}
+	BitStream_writeBytes(bstream->data + bstream->length, size, data);
+	bstream->length += size * 8;
+
+	return 0;
+}
+
+unsigned char *BitStream_toByte(BitStream *bstream)
+{
+	size_t i, j, size, bytes, oddbits;
+	unsigned char *data, v;
+	unsigned char *p;
+
+	size = BitStream_size(bstream);
+	if(size == 0) {
+		return NULL;
+	}
+	data = (unsigned char *)malloc((size + 7) / 8);
+	if(data == NULL) {
+		return NULL;
+	}
+
+	bytes = size  / 8;
+
+	p = bstream->data;
+	for(i = 0; i < bytes; i++) {
+		v = 0;
+		for(j = 0; j < 8; j++) {
+			v = (unsigned char)(v << 1);
+			v |= *p;
+			p++;
+		}
+		data[i] = v;
+	}
+	oddbits = size & 7;
+	if(oddbits > 0) {
+		v = 0;
+		for(j = 0; j < oddbits; j++) {
+			v = (unsigned char)(v << 1);
+			v |= *p;
+			p++;
+		}
+		data[bytes] = (unsigned char)(v << (8 - oddbits));
+	}
+
+	return data;
+}
+
+void BitStream_free(BitStream *bstream)
+{
+	if(bstream != NULL) {
+		free(bstream->data);
+		free(bstream);
+	}
+}
diff --git a/libs/libqrencode/src/bitstream.h b/libs/libqrencode/src/bitstream.h
new file mode 100644
index 0000000000..70f3e1dfc5
--- /dev/null
+++ b/libs/libqrencode/src/bitstream.h
@@ -0,0 +1,43 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Binary sequence class.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef BITSTREAM_H
+#define BITSTREAM_H
+
+typedef struct {
+	size_t length;
+	size_t datasize;
+	unsigned char *data;
+} BitStream;
+
+extern BitStream *BitStream_new(void);
+#ifdef WITH_TESTS
+extern BitStream *BitStream_newWithBits(size_t size, unsigned char *bits);
+#endif
+extern int BitStream_append(BitStream *bstream, BitStream *arg);
+extern int BitStream_appendNum(BitStream *bstream, size_t bits, unsigned int num);
+extern int BitStream_appendBytes(BitStream *bstream, size_t size, unsigned char *data);
+#define BitStream_size(__bstream__) (__bstream__->length)
+#define BitStream_reset(__bstream__) (__bstream__->length = 0)
+extern unsigned char *BitStream_toByte(BitStream *bstream);
+extern void BitStream_free(BitStream *bstream);
+
+#endif /* BITSTREAM_H */
diff --git a/libs/libqrencode/src/cmake/FindIconv.cmake b/libs/libqrencode/src/cmake/FindIconv.cmake
new file mode 100644
index 0000000000..fede82a093
--- /dev/null
+++ b/libs/libqrencode/src/cmake/FindIconv.cmake
@@ -0,0 +1,115 @@
+include(CheckFunctionExists)
+
+set(_ICONV_SEARCHES)
+
+# Search ICONV_DIR first if it is set.
+if(NOT ICONV_DIR AND ENV{ICONV_DIR})
+  set(ICONV_DIR $ENV{ICONV_DIR})
+endif()
+
+if(ICONV_DIR)
+  set(_ICONV_DIR_SEARCH PATHS ${ICONV_DIR} NO_DEFAULT_PATH)
+  list(APPEND _ICONV_SEARCHES _ICONV_DIR_SEARCH)
+endif()
+
+# Normal search.
+set(_ICONV_SEARCH_NORMAL
+    PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Iconv;InstallPath]"
+          "$ENV{PROGRAMFILES}/iconv"
+          ENV CPATH
+          ENV C_INCLUDE_PATH
+          ENV CPLUS_INCLUDE_PATH
+          ENV LIBRARY_PATH)
+list(APPEND _ICONV_SEARCHES _ICONV_SEARCH_NORMAL)
+
+set(ICONV_NAMES iconv iconv2 libiconv iconv64)
+set(ICONV_NAMES_DEBUG iconvd iconv64d)
+
+# Try each search configuration.
+foreach(search ${_ICONV_SEARCHES})
+    find_path(ICONV_INCLUDE_DIR NAMES iconv.h ${${search}} PATH_SUFFIXES include)
+endforeach()
+
+# Allow ICONV_LIBRARY to be set manually, as the location of the iconv library
+if(NOT ICONV_LIBRARY)
+    foreach(search ${_ICONV_SEARCHES})
+        find_library(ICONV_LIBRARY_RELEASE NAMES ${ICONV_NAMES} ${${search}} PATH_SUFFIXES lib)
+        find_library(ICONV_LIBRARY_DEBUG   NAMES ${ICONV_NAMES_DEBUG} ${${search}} PATH_SUFFIXES lib)
+    endforeach()
+
+    include(SelectLibraryConfigurations)
+    select_library_configurations(ICONV)
+endif()
+
+unset(ICONV_NAMES)
+unset(ICONV_NAMES_DEBUG)
+
+if(ICONV_INCLUDE_DIR AND EXISTS "${ICONV_INCLUDE_DIR}/iconv.h")
+    file(STRINGS "${ICONV_INCLUDE_DIR}/iconv.h" ICONV_H REGEX "^#define _LIBICONV_VERSION 0x([0-9]+)")
+    string(REGEX MATCH "q#define _LIBICONV_VERSION 0x([0-9][0-9])([0-9][0-9])?([0-9][0-9])?.*" temp_match "${ICONV_H}")
+    unset(temp_match)
+    if(CMAKE_MATCH_0)
+        set(ICONV_VERSION_MAJOR "${CMAKE_MATCH_1}")
+        set(ICONV_VERSION_MINOR "${CMAKE_MATCH_2}")
+        set(ICONV_VERSION_PATCH "${CMAKE_MATCH_3}")
+        string(REGEX REPLACE "0*([1-9][0-9]*).*" "\\1" ICONV_VERSION_MAJOR "${ICONV_VERSION_MAJOR}")
+        string(REGEX REPLACE "0*([1-9][0-9]*).*" "\\1" ICONV_VERSION_MINOR "${ICONV_VERSION_MINOR}")
+        string(REGEX REPLACE "0*([1-9][0-9]*).*" "\\1" ICONV_VERSION_PATCH "${ICONV_VERSION_PATCH}")
+
+        set(ICONV_VERSION_STRING "${ICONV_VERSION_MAJOR}.${ICONV_VERSION_MINOR}")
+        if(ICONV_VERSION_PATCH)
+            set(ICONV_VERSION_STRING "${ICONV_VERSION_STRING}.${ICONV_VERSION_PATCH}")
+        endif()
+    endif()
+endif()
+
+check_function_exists(iconv_open ICONV_IN_GLIBC)
+
+set(ICONV_FOUND_ANY FALSE)
+if(ICONV_IN_GLIBC OR ICONV_LIBRARY)
+    set(ICONV_FOUND_ANY TRUE)
+endif()
+
+# handle the QUIETLY and REQUIRED arguments and set ICONV_FOUND to TRUE if
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(ICONV
+    REQUIRED_VARS ICONV_FOUND_ANY ICONV_INCLUDE_DIR
+    VERSION_VAR ICONV_VERSION_STRING)
+
+mark_as_advanced(ICONV_LIBRARY ICONV_INCLUDE_DIR)
+
+if(NOT ICONV_FOUND)
+    return()
+endif()
+
+set(ICONV_INCLUDE_DIRS ${ICONV_INCLUDE_DIR})
+
+if(NOT ICONV_LIBRARIES)
+    set(ICONV_LIBRARIES ${ICONV_LIBRARY})
+endif()
+
+if(ICONV_LIBRARY AND NOT TARGET ICONV::ICONV)
+    add_library(ICONV::ICONV UNKNOWN IMPORTED)
+    set_target_properties(ICONV::ICONV PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES "${ICONV_INCLUDE_DIRS}"
+        IMPORTED_LOCATION "${ICONV_LIBRARY}")
+
+    if(ICONV_LIBRARY_RELEASE)
+        set_property(TARGET ICONV::ICONV APPEND PROPERTY
+            IMPORTED_CONFIGURATIONS RELEASE)
+        set_target_properties(ICONV::ICONV PROPERTIES
+            IMPORTED_LOCATION_RELEASE "${ICONV_LIBRARY_RELEASE}")
+    endif()
+
+    if(ICONV_LIBRARY_DEBUG)
+        set_property(TARGET ICONV::ICONV APPEND PROPERTY
+            IMPORTED_CONFIGURATIONS DEBUG)
+        set_target_properties(ICONV::ICONV PROPERTIES
+            IMPORTED_LOCATION_DEBUG "${ICONV_LIBRARY_DEBUG}")
+    endif()
+elseif(NOT TARGET ICONV::ICONV)
+    add_library(ICONV::ICONV INTERFACE IMPORTED)
+    set_target_properties(ICONV::ICONV PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES "${ICONV_INCLUDE_DIRS}")
+endif()
diff --git a/libs/libqrencode/src/mask.c b/libs/libqrencode/src/mask.c
new file mode 100644
index 0000000000..4bf2371765
--- /dev/null
+++ b/libs/libqrencode/src/mask.c
@@ -0,0 +1,357 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Masking.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <errno.h>
+
+#include "qrencode.h"
+#include "qrspec.h"
+#include "mask.h"
+
+STATIC_IN_RELEASE int Mask_writeFormatInformation(int width, unsigned char *frame, int mask, QRecLevel level)
+{
+	unsigned int format;
+	unsigned char v;
+	int i;
+	int blacks = 0;
+
+	format = QRspec_getFormatInfo(mask, level);
+
+	for(i = 0; i < 8; i++) {
+		if(format & 1) {
+			blacks += 2;
+			v = 0x85;
+		} else {
+			v = 0x84;
+		}
+		frame[width * 8 + width - 1 - i] = v;
+		if(i < 6) {
+			frame[width * i + 8] = v;
+		} else {
+			frame[width * (i + 1) + 8] = v;
+		}
+		format= format >> 1;
+	}
+	for(i = 0; i < 7; i++) {
+		if(format & 1) {
+			blacks += 2;
+			v = 0x85;
+		} else {
+			v = 0x84;
+		}
+		frame[width * (width - 7 + i) + 8] = v;
+		if(i == 0) {
+			frame[width * 8 + 7] = v;
+		} else {
+			frame[width * 8 + 6 - i] = v;
+		}
+		format= format >> 1;
+	}
+
+	return blacks;
+}
+
+/**
+ * Demerit coefficients.
+ * See Section 8.8.2, pp.45, JIS X0510:2004.
+ */
+#define N1 (3)
+#define N2 (3)
+#define N3 (40)
+#define N4 (10)
+
+#define MASKMAKER(__exp__) \
+	int x, y;\
+	int b = 0;\
+\
+	for(y = 0; y < width; y++) {\
+		for(x = 0; x < width; x++) {\
+			if(*s & 0x80) {\
+				*d = *s;\
+			} else {\
+				*d = *s ^ ((__exp__) == 0);\
+			}\
+			b += (int)(*d & 1);\
+			s++; d++;\
+		}\
+	}\
+	return b;
+
+static int Mask_mask0(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((x+y)&1)
+}
+
+static int Mask_mask1(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(y&1)
+}
+
+static int Mask_mask2(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(x%3)
+}
+
+static int Mask_mask3(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((x+y)%3)
+}
+
+static int Mask_mask4(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(((y/2)+(x/3))&1)
+}
+
+static int Mask_mask5(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(((x*y)&1)+(x*y)%3)
+}
+
+static int Mask_mask6(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((((x*y)&1)+(x*y)%3)&1)
+}
+
+static int Mask_mask7(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((((x*y)%3)+((x+y)&1))&1)
+}
+
+#define maskNum (8)
+typedef int MaskMaker(int, const unsigned char *, unsigned char *);
+static MaskMaker *maskMakers[maskNum] = {
+	Mask_mask0, Mask_mask1, Mask_mask2, Mask_mask3,
+	Mask_mask4, Mask_mask5, Mask_mask6, Mask_mask7
+};
+
+#ifdef WITH_TESTS
+unsigned char *Mask_makeMaskedFrame(int width, unsigned char *frame, int mask)
+{
+	unsigned char *masked;
+
+	masked = (unsigned char *)malloc((size_t)(width * width));
+	if(masked == NULL) return NULL;
+
+	maskMakers[mask](width, frame, masked);
+
+	return masked;
+}
+#endif
+
+unsigned char *Mask_makeMask(int width, unsigned char *frame, int mask, QRecLevel level)
+{
+	unsigned char *masked;
+
+	if(mask < 0 || mask >= maskNum) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	masked = (unsigned char *)malloc((size_t)(width * width));
+	if(masked == NULL) return NULL;
+
+	maskMakers[mask](width, frame, masked);
+	Mask_writeFormatInformation(width, masked, mask, level);
+
+	return masked;
+}
+
+
+//static int n1;
+//static int n2;
+//static int n3;
+//static int n4;
+
+STATIC_IN_RELEASE int Mask_calcN1N3(int length, int *runLength)
+{
+	int i;
+	int demerit = 0;
+	int fact;
+
+	for(i = 0; i < length; i++) {
+		if(runLength[i] >= 5) {
+			demerit += N1 + (runLength[i] - 5);
+			//n1 += N1 + (runLength[i] - 5);
+		}
+		if((i & 1)) {
+			if(i >= 3 && i < length-2 && (runLength[i] % 3) == 0) {
+				fact = runLength[i] / 3;
+				if(runLength[i-2] == fact &&
+				   runLength[i-1] == fact &&
+				   runLength[i+1] == fact &&
+				   runLength[i+2] == fact) {
+					if(i == 3 || runLength[i-3] >= 4 * fact) {
+						demerit += N3;
+						//n3 += N3;
+					} else if(i+4 >= length || runLength[i+3] >= 4 * fact) {
+						demerit += N3;
+						//n3 += N3;
+					}
+				}
+			}
+		}
+	}
+
+	return demerit;
+}
+
+STATIC_IN_RELEASE int Mask_calcN2(int width, unsigned char *frame)
+{
+	int x, y;
+	unsigned char *p;
+	unsigned char b22, w22;
+	int demerit = 0;
+
+	p = frame + width + 1;
+	for(y = 1; y < width; y++) {
+		for(x = 1; x < width; x++) {
+			b22 = p[0] & p[-1] & p[-width] & p [-width-1];
+			w22 = p[0] | p[-1] | p[-width] | p [-width-1];
+			if((b22 | (w22 ^ 1))&1) {
+				demerit += N2;
+			}
+			p++;
+		}
+		p++;
+	}
+
+	return demerit;
+}
+
+STATIC_IN_RELEASE int Mask_calcRunLengthH(int width, unsigned char *frame, int *runLength)
+{
+	int head;
+	int i;
+	unsigned char prev;
+
+	if(frame[0] & 1) {
+		runLength[0] = -1;
+		head = 1;
+	} else {
+		head = 0;
+	}
+	runLength[head] = 1;
+	prev = frame[0];
+
+	for(i = 1; i < width; i++) {
+		if((frame[i] ^ prev) & 1) {
+			head++;
+			runLength[head] = 1;
+			prev = frame[i];
+		} else {
+			runLength[head]++;
+		}
+	}
+
+	return head + 1;
+}
+
+STATIC_IN_RELEASE int Mask_calcRunLengthV(int width, unsigned char *frame, int *runLength)
+{
+	int head;
+	int i;
+	unsigned char prev;
+
+	if(frame[0] & 1) {
+		runLength[0] = -1;
+		head = 1;
+	} else {
+		head = 0;
+	}
+	runLength[head] = 1;
+	prev = frame[0];
+
+	for(i = 1; i < width; i++) {
+		if((frame[i * width] ^ prev) & 1) {
+			head++;
+			runLength[head] = 1;
+			prev = frame[i * width];
+		} else {
+			runLength[head]++;
+		}
+	}
+
+	return head + 1;
+}
+
+STATIC_IN_RELEASE int Mask_evaluateSymbol(int width, unsigned char *frame)
+{
+	int x, y;
+	int demerit = 0;
+	int runLength[QRSPEC_WIDTH_MAX + 1];
+	int length;
+
+	demerit += Mask_calcN2(width, frame);
+
+	for(y = 0; y < width; y++) {
+		length = Mask_calcRunLengthH(width, frame + y * width, runLength);
+		demerit += Mask_calcN1N3(length, runLength);
+	}
+
+	for(x = 0; x < width; x++) {
+		length = Mask_calcRunLengthV(width, frame + x, runLength);
+		demerit += Mask_calcN1N3(length, runLength);
+	}
+
+	return demerit;
+}
+
+unsigned char *Mask_mask(int width, unsigned char *frame, QRecLevel level)
+{
+	int i;
+	unsigned char *mask, *bestMask;
+	int minDemerit = INT_MAX;
+	int blacks;
+	int bratio;
+	int demerit;
+	int w2 = width * width;
+
+	mask = (unsigned char *)malloc((size_t)w2);
+	if(mask == NULL) return NULL;
+	bestMask = (unsigned char *)malloc((size_t)w2);
+	if(bestMask == NULL) {
+		free(mask);
+		return NULL;
+	}
+
+	for(i = 0; i < maskNum; i++) {
+//		n1 = n2 = n3 = n4 = 0;
+		demerit = 0;
+		blacks = maskMakers[i](width, frame, mask);
+		blacks += Mask_writeFormatInformation(width, mask, i, level);
+		bratio = (200 * blacks + w2) / w2 / 2; /* (int)(100*blacks/w2+0.5) */
+		demerit = (abs(bratio - 50) / 5) * N4;
+//		n4 = demerit;
+		demerit += Mask_evaluateSymbol(width, mask);
+//		printf("(%d,%d,%d,%d)=%d\n", n1, n2, n3 ,n4, demerit);
+		if(demerit < minDemerit) {
+			minDemerit = demerit;
+			memcpy(bestMask, mask, (size_t)w2);
+		}
+	}
+	free(mask);
+	return bestMask;
+}
diff --git a/libs/libqrencode/src/mask.h b/libs/libqrencode/src/mask.h
new file mode 100644
index 0000000000..169e64b2bb
--- /dev/null
+++ b/libs/libqrencode/src/mask.h
@@ -0,0 +1,38 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Masking.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MASK_H
+#define MASK_H
+
+extern unsigned char *Mask_makeMask(int width, unsigned char *frame, int mask, QRecLevel level);
+extern unsigned char *Mask_mask(int width, unsigned char *frame, QRecLevel level);
+
+#ifdef WITH_TESTS
+extern int Mask_calcN2(int width, unsigned char *frame);
+extern int Mask_calcN1N3(int length, int *runLength);
+extern int Mask_calcRunLengthH(int width, unsigned char *frame, int *runLength);
+extern int Mask_calcRunLengthV(int width, unsigned char *frame, int *runLength);
+extern int Mask_evaluateSymbol(int width, unsigned char *frame);
+extern int Mask_writeFormatInformation(int width, unsigned char *frame, int mask, QRecLevel level);
+extern unsigned char *Mask_makeMaskedFrame(int width, unsigned char *frame, int mask);
+#endif
+
+#endif /* MASK_H */
diff --git a/libs/libqrencode/src/mmask.c b/libs/libqrencode/src/mmask.c
new file mode 100644
index 0000000000..5f09a1e981
--- /dev/null
+++ b/libs/libqrencode/src/mmask.c
@@ -0,0 +1,177 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Masking for Micro QR Code.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <errno.h>
+
+#include "qrencode.h"
+#include "mqrspec.h"
+#include "mmask.h"
+
+STATIC_IN_RELEASE void MMask_writeFormatInformation(int version, int width, unsigned char *frame, int mask, QRecLevel level)
+{
+	unsigned int format;
+	unsigned char v;
+	int i;
+
+	format = MQRspec_getFormatInfo(mask, version, level);
+
+	for(i = 0; i < 8; i++) {
+		v = 0x84 | (format & 1);
+		frame[width * (i + 1) + 8] = v;
+		format = format >> 1;
+	}
+	for(i = 0; i < 7; i++) {
+		v = 0x84 | (format & 1);
+		frame[width * 8 + 7 - i] = v;
+		format = format >> 1;
+	}
+}
+
+#define MASKMAKER(__exp__) \
+	int x, y;\
+\
+	for(y = 0; y < width; y++) {\
+		for(x = 0; x < width; x++) {\
+			if(*s & 0x80) {\
+				*d = *s;\
+			} else {\
+				*d = *s ^ ((__exp__) == 0);\
+			}\
+			s++; d++;\
+		}\
+	}
+
+static void Mask_mask0(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(y&1)
+}
+
+static void Mask_mask1(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER(((y/2)+(x/3))&1)
+}
+
+static void Mask_mask2(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((((x*y)&1)+(x*y)%3)&1)
+}
+
+static void Mask_mask3(int width, const unsigned char *s, unsigned char *d)
+{
+	MASKMAKER((((x+y)&1)+((x*y)%3))&1)
+}
+
+#define maskNum (4)
+typedef void MaskMaker(int, const unsigned char *, unsigned char *);
+static MaskMaker *maskMakers[maskNum] = {
+	Mask_mask0, Mask_mask1, Mask_mask2, Mask_mask3
+};
+
+#ifdef WITH_TESTS
+unsigned char *MMask_makeMaskedFrame(int width, unsigned char *frame, int mask)
+{
+	unsigned char *masked;
+
+	masked = (unsigned char *)malloc((size_t)(width * width));
+	if(masked == NULL) return NULL;
+
+	maskMakers[mask](width, frame, masked);
+
+	return masked;
+}
+#endif
+
+unsigned char *MMask_makeMask(int version, unsigned char *frame, int mask, QRecLevel level)
+{
+	unsigned char *masked;
+	int width;
+
+	if(mask < 0 || mask >= maskNum) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	width = MQRspec_getWidth(version);
+	masked = (unsigned char *)malloc((size_t)(width * width));
+	if(masked == NULL) return NULL;
+
+	maskMakers[mask](width, frame, masked);
+	MMask_writeFormatInformation(version, width, masked, mask, level);
+
+	return masked;
+}
+
+STATIC_IN_RELEASE int MMask_evaluateSymbol(int width, unsigned char *frame)
+{
+	int x, y;
+	unsigned char *p;
+	int sum1 = 0, sum2 = 0;
+
+	p = frame + width * (width - 1);
+	for(x = 1; x < width; x++) {
+		sum1 += (p[x] & 1);
+	}
+
+	p = frame + width * 2 - 1;
+	for(y = 1; y < width; y++) {
+		sum2 += (*p & 1);
+		p += width;
+	}
+
+	return (sum1 <= sum2)?(sum1 * 16 + sum2):(sum2 * 16 + sum1);
+}
+
+unsigned char *MMask_mask(int version, unsigned char *frame, QRecLevel level)
+{
+	int i;
+	unsigned char *mask, *bestMask;
+	int maxScore = 0;
+	int score;
+	int width;
+
+	width = MQRspec_getWidth(version);
+
+	mask = (unsigned char *)malloc((size_t)(width * width));
+	if(mask == NULL) return NULL;
+	bestMask = NULL;
+
+	for(i = 0; i < maskNum; i++) {
+		score = 0;
+		maskMakers[i](width, frame, mask);
+		MMask_writeFormatInformation(version, width, mask, i, level);
+		score = MMask_evaluateSymbol(width, mask);
+		if(score > maxScore) {
+			maxScore = score;
+			free(bestMask);
+			bestMask = mask;
+			mask = (unsigned char *)malloc((size_t)(width * width));
+			if(mask == NULL) break;
+		}
+	}
+	free(mask);
+	return bestMask;
+}
diff --git a/libs/libqrencode/src/mmask.h b/libs/libqrencode/src/mmask.h
new file mode 100644
index 0000000000..56a58cd2d7
--- /dev/null
+++ b/libs/libqrencode/src/mmask.h
@@ -0,0 +1,34 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Masking for Micro QR Code.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MMASK_H
+#define MMASK_H
+
+extern unsigned char *MMask_makeMask(int version, unsigned char *frame, int mask, QRecLevel level);
+extern unsigned char *MMask_mask(int version, unsigned char *frame, QRecLevel level);
+
+#ifdef WITH_TESTS
+extern int MMask_evaluateSymbol(int width, unsigned char *frame);
+extern void MMask_writeFormatInformation(int version, int width, unsigned char *frame, int mask, QRecLevel level);
+extern unsigned char *MMask_makeMaskedFrame(int width, unsigned char *frame, int mask);
+#endif
+
+#endif /* MMASK_H */
diff --git a/libs/libqrencode/src/mqrspec.c b/libs/libqrencode/src/mqrspec.c
new file mode 100644
index 0000000000..87205fe970
--- /dev/null
+++ b/libs/libqrencode/src/mqrspec.c
@@ -0,0 +1,232 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Micro QR Code specification in convenient format.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ *  or
+ * "Automatic identification and data capture techniques --
+ *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "mqrspec.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+typedef struct {
+	int width; ///< Edge length of the symbol
+	int ec[4]; ///< Number of ECC code (bytes)
+} MQRspec_Capacity;
+
+/**
+ * Table of the capacity of symbols
+ * See Table 1 (pp.106) and Table 8 (pp.113) of Appendix 1, JIS X0510:2004.
+ */
+static const MQRspec_Capacity mqrspecCapacity[MQRSPEC_VERSION_MAX + 1] = {
+	{  0, {0,  0,  0, 0}},
+	{ 11, {2,  0,  0, 0}},
+	{ 13, {5,  6,  0, 0}},
+	{ 15, {6,  8,  0, 0}},
+	{ 17, {8, 10, 14, 0}}
+};
+
+int MQRspec_getDataLengthBit(int version, QRecLevel level)
+{
+	int w;
+	int ecc;
+
+	w = mqrspecCapacity[version].width - 1;
+	ecc = mqrspecCapacity[version].ec[level];
+	if(ecc == 0) return 0;
+	return w * w - 64 - ecc * 8;
+}
+
+int MQRspec_getDataLength(int version, QRecLevel level)
+{
+	return (MQRspec_getDataLengthBit(version, level) + 4) / 8;
+}
+
+int MQRspec_getECCLength(int version, QRecLevel level)
+{
+	return mqrspecCapacity[version].ec[level];
+}
+
+int MQRspec_getWidth(int version)
+{
+	return mqrspecCapacity[version].width;
+}
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+/**
+ * See Table 3 (pp.107) of Appendix 1, JIS X0510:2004.
+ */
+static const int lengthTableBits[4][4] = {
+	{ 3, 4, 5, 6},
+	{ 0, 3, 4, 5},
+	{ 0, 0, 4, 5},
+	{ 0, 0, 3, 4}
+};
+
+int MQRspec_lengthIndicator(QRencodeMode mode, int version)
+{
+	return lengthTableBits[mode][version - 1];
+}
+
+int MQRspec_maximumWords(QRencodeMode mode, int version)
+{
+	int bits;
+	int words;
+
+	bits = lengthTableBits[mode][version - 1];
+	words = (1 << bits) - 1;
+	if(mode == QR_MODE_KANJI) {
+		words *= 2; // the number of bytes is required
+	}
+
+	return words;
+}
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/* See calcFormatInfo in tests/test_mqrspec.c */
+static const unsigned int formatInfo[4][8] = {
+	{0x4445, 0x55ae, 0x6793, 0x7678, 0x06de, 0x1735, 0x2508, 0x34e3},
+	{0x4172, 0x5099, 0x62a4, 0x734f, 0x03e9, 0x1202, 0x203f, 0x31d4},
+	{0x4e2b, 0x5fc0, 0x6dfd, 0x7c16, 0x0cb0, 0x1d5b, 0x2f66, 0x3e8d},
+	{0x4b1c, 0x5af7, 0x68ca, 0x7921, 0x0987, 0x186c, 0x2a51, 0x3bba}
+};
+
+/* See Table 10 of Appendix 1. (pp.115) */
+static const int typeTable[MQRSPEC_VERSION_MAX + 1][3] = {
+	{-1, -1, -1},
+	{ 0, -1, -1},
+	{ 1,  2, -1},
+	{ 3,  4, -1},
+	{ 5,  6,  7}
+};
+
+unsigned int MQRspec_getFormatInfo(int mask, int version, QRecLevel level)
+{
+	int type;
+
+	if(mask < 0 || mask > 3) return 0;
+	if(version <= 0 || version > MQRSPEC_VERSION_MAX) return 0;
+	if(level == QR_ECLEVEL_H) return 0;
+	type = typeTable[version][level];
+	if(type < 0) return 0;
+
+	return formatInfo[mask][type];
+}
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Put a finder pattern.
+ * @param frame
+ * @param width
+ * @param ox,oy upper-left coordinate of the pattern
+ */
+static void putFinderPattern(unsigned char *frame, int width, int ox, int oy)
+{
+	static const unsigned char finder[] = {
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+	};
+	int x, y;
+	const unsigned char *s;
+
+	frame += oy * width + ox;
+	s = finder;
+	for(y = 0; y < 7; y++) {
+		for(x = 0; x < 7; x++) {
+			frame[x] = s[x];
+		}
+		frame += width;
+		s += 7;
+	}
+}
+
+static unsigned char *MQRspec_createFrame(int version)
+{
+	unsigned char *frame, *p, *q;
+	int width;
+	int x, y;
+
+	width = mqrspecCapacity[version].width;
+	frame = (unsigned char *)malloc((size_t)(width * width));
+	if(frame == NULL) return NULL;
+
+	memset(frame, 0, (size_t)(width * width));
+	/* Finder pattern */
+	putFinderPattern(frame, width, 0, 0);
+	/* Separator */
+	p = frame;
+	for(y = 0; y < 7; y++) {
+		p[7] = 0xc0;
+		p += width;
+	}
+	memset(frame + width * 7, 0xc0, 8);
+	/* Mask format information area */
+	memset(frame + width * 8 + 1, 0x84, 8);
+	p = frame + width + 8;
+	for(y = 0; y < 7; y++) {
+		*p = 0x84;
+		p += width;
+	}
+	/* Timing pattern */
+	p = frame + 8;
+	q = frame + width * 8;
+	for(x = 1; x < width-7; x++) {
+		*p =  0x90 | (x & 1);
+		*q =  0x90 | (x & 1);
+		p++;
+		q += width;
+	}
+
+	return frame;
+}
+
+unsigned char *MQRspec_newFrame(int version)
+{
+	if(version < 1 || version > MQRSPEC_VERSION_MAX) return NULL;
+
+	return MQRspec_createFrame(version);
+}
diff --git a/libs/libqrencode/src/mqrspec.h b/libs/libqrencode/src/mqrspec.h
new file mode 100644
index 0000000000..0eaa4907f5
--- /dev/null
+++ b/libs/libqrencode/src/mqrspec.h
@@ -0,0 +1,150 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Micro QR Code specification in convenient format.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef MQRSPEC_H
+#define MQRSPEC_H
+
+#include "qrencode.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+/**
+ * Maximum width of a symbol
+ */
+#define MQRSPEC_WIDTH_MAX 17
+
+/**
+ * Return maximum data code length (bits) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return maximum size (bits)
+ */
+extern int MQRspec_getDataLengthBit(int version, QRecLevel level);
+
+/**
+ * Return maximum data code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return maximum size (bytes)
+ */
+extern int MQRspec_getDataLength(int version, QRecLevel level);
+
+/**
+ * Return maximum error correction code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return ECC size (bytes)
+ */
+extern int MQRspec_getECCLength(int version, QRecLevel level);
+
+/**
+ * Return a version number that satisfies the input code length.
+ * @param size input code length (byte)
+ * @param level error correction level
+ * @return version number
+ */
+extern int MQRspec_getMinimumVersion(int size, QRecLevel level);
+
+/**
+ * Return the width of the symbol for the version.
+ * @param version version of the symbol
+ * @return width
+ */
+extern int MQRspec_getWidth(int version);
+
+/**
+ * Return the numer of remainder bits.
+ * @param version version of the symbol
+ * @return number of remainder bits
+ */
+extern int MQRspec_getRemainder(int version);
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+/**
+ * Return the size of length indicator for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the size of the appropriate length indicator (bits).
+ */
+extern int MQRspec_lengthIndicator(QRencodeMode mode, int version);
+
+/**
+ * Return the maximum length for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the maximum length (bytes)
+ */
+extern int MQRspec_maximumWords(QRencodeMode mode, int version);
+
+/******************************************************************************
+ * Version information pattern
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded version information pattern that is used for the symbol
+ * of version 7 or greater. Use lower 18 bits.
+ * @param version vesion of the symbol
+ * @return BCH encoded version information pattern
+ */
+extern unsigned int MQRspec_getVersionPattern(int version);
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded format information pattern.
+ * @param mask mask number
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return BCH encoded format information pattern
+ */
+extern unsigned int MQRspec_getFormatInfo(int mask, int version, QRecLevel level);
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Return a copy of initialized frame.
+ * @param version version of the symbol
+ * @return Array of unsigned char. You can free it by free().
+ */
+extern unsigned char *MQRspec_newFrame(int version);
+
+/******************************************************************************
+ * Mode indicator
+ *****************************************************************************/
+
+/**
+ * Mode indicator. See Table 2 in Appendix 1 of JIS X0510:2004, pp.107.
+ */
+#define MQRSPEC_MODEID_NUM       0
+#define MQRSPEC_MODEID_AN        1
+#define MQRSPEC_MODEID_8         2
+#define MQRSPEC_MODEID_KANJI     3
+
+#endif /* MQRSPEC_H */
diff --git a/libs/libqrencode/src/qrencode.c b/libs/libqrencode/src/qrencode.c
new file mode 100644
index 0000000000..f0f8f95e0f
--- /dev/null
+++ b/libs/libqrencode/src/qrencode.c
@@ -0,0 +1,881 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "qrencode.h"
+#include "qrspec.h"
+#include "mqrspec.h"
+#include "bitstream.h"
+#include "qrinput.h"
+#include "rsecc.h"
+#include "split.h"
+#include "mask.h"
+#include "mmask.h"
+
+/******************************************************************************
+ * Raw code
+ *****************************************************************************/
+
+typedef struct {
+	int dataLength;
+	int eccLength;
+	unsigned char *data;
+	unsigned char *ecc;
+} RSblock;
+
+typedef struct {
+	int version;
+	int dataLength;
+	int eccLength;
+	unsigned char *datacode;
+	unsigned char *ecccode;
+	int b1;
+	int blocks;
+	RSblock *rsblock;
+	int count;
+} QRRawCode;
+
+static void RSblock_initBlock(RSblock *block, int dl, unsigned char *data, int el, unsigned char *ecc)
+{
+	block->dataLength = dl;
+	block->data = data;
+	block->eccLength = el;
+	block->ecc = ecc;
+
+	RSECC_encode((size_t)dl, (size_t)el, data, ecc);
+}
+
+static int RSblock_init(RSblock *blocks, int spec[5], unsigned char *data, unsigned char *ecc)
+{
+	int i;
+	RSblock *block;
+	unsigned char *dp, *ep;
+	int el, dl;
+
+	dl = QRspec_rsDataCodes1(spec);
+	el = QRspec_rsEccCodes1(spec);
+
+	block = blocks;
+	dp = data;
+	ep = ecc;
+	for(i = 0; i < QRspec_rsBlockNum1(spec); i++) {
+		RSblock_initBlock(block, dl, dp, el, ep);
+		dp += dl;
+		ep += el;
+		block++;
+	}
+
+	if(QRspec_rsBlockNum2(spec) == 0) return 0;
+
+	dl = QRspec_rsDataCodes2(spec);
+	el = QRspec_rsEccCodes2(spec);
+	for(i = 0; i < QRspec_rsBlockNum2(spec); i++) {
+		RSblock_initBlock(block, dl, dp, el, ep);
+		dp += dl;
+		ep += el;
+		block++;
+	}
+
+	return 0;
+}
+
+STATIC_IN_RELEASE void QRraw_free(QRRawCode *raw);
+STATIC_IN_RELEASE QRRawCode *QRraw_new(QRinput *input)
+{
+	QRRawCode *raw;
+	int spec[5], ret;
+
+	raw = (QRRawCode *)malloc(sizeof(QRRawCode));
+	if(raw == NULL) return NULL;
+
+	raw->datacode = QRinput_getByteStream(input);
+	if(raw->datacode == NULL) {
+		free(raw);
+		return NULL;
+	}
+
+	QRspec_getEccSpec(input->version, input->level, spec);
+
+	raw->version = input->version;
+	raw->b1 = QRspec_rsBlockNum1(spec);
+	raw->dataLength = QRspec_rsDataLength(spec);
+	raw->eccLength = QRspec_rsEccLength(spec);
+	raw->ecccode = (unsigned char *)malloc((size_t)raw->eccLength);
+	if(raw->ecccode == NULL) {
+		free(raw->datacode);
+		free(raw);
+		return NULL;
+	}
+
+	raw->blocks = QRspec_rsBlockNum(spec);
+	raw->rsblock = (RSblock *)calloc((size_t)(raw->blocks), sizeof(RSblock));
+	if(raw->rsblock == NULL) {
+		QRraw_free(raw);
+		return NULL;
+	}
+	ret = RSblock_init(raw->rsblock, spec, raw->datacode, raw->ecccode);
+	if(ret < 0) {
+		QRraw_free(raw);
+		return NULL;
+	}
+
+	raw->count = 0;
+
+	return raw;
+}
+
+/**
+ * Return a code (byte).
+ * This function can be called iteratively.
+ * @param raw raw code.
+ * @return code
+ */
+STATIC_IN_RELEASE unsigned char QRraw_getCode(QRRawCode *raw)
+{
+	int col, row;
+	unsigned char ret;
+
+	if(raw->count < raw->dataLength) {
+		row = raw->count % raw->blocks;
+		col = raw->count / raw->blocks;
+		if(col >= raw->rsblock[0].dataLength) {
+			row += raw->b1;
+		}
+		ret = raw->rsblock[row].data[col];
+	} else if(raw->count < raw->dataLength + raw->eccLength) {
+		row = (raw->count - raw->dataLength) % raw->blocks;
+		col = (raw->count - raw->dataLength) / raw->blocks;
+		ret = raw->rsblock[row].ecc[col];
+	} else {
+		return 0;
+	}
+	raw->count++;
+	return ret;
+}
+
+STATIC_IN_RELEASE void QRraw_free(QRRawCode *raw)
+{
+	if(raw != NULL) {
+		free(raw->datacode);
+		free(raw->ecccode);
+		free(raw->rsblock);
+		free(raw);
+	}
+}
+
+/******************************************************************************
+ * Raw code for Micro QR Code
+ *****************************************************************************/
+
+typedef struct {
+	int version;
+	int dataLength;
+	int eccLength;
+	unsigned char *datacode;
+	unsigned char *ecccode;
+	RSblock *rsblock;
+	int oddbits;
+	int count;
+} MQRRawCode;
+
+STATIC_IN_RELEASE void MQRraw_free(MQRRawCode *raw);
+STATIC_IN_RELEASE MQRRawCode *MQRraw_new(QRinput *input)
+{
+	MQRRawCode *raw;
+
+	raw = (MQRRawCode *)malloc(sizeof(MQRRawCode));
+	if(raw == NULL) return NULL;
+
+	raw->version = input->version;
+	raw->dataLength = MQRspec_getDataLength(input->version, input->level);
+	raw->eccLength = MQRspec_getECCLength(input->version, input->level);
+	raw->oddbits = raw->dataLength * 8 - MQRspec_getDataLengthBit(input->version, input->level);
+	raw->datacode = QRinput_getByteStream(input);
+	if(raw->datacode == NULL) {
+		free(raw);
+		return NULL;
+	}
+	raw->ecccode = (unsigned char *)malloc((size_t)raw->eccLength);
+	if(raw->ecccode == NULL) {
+		free(raw->datacode);
+		free(raw);
+		return NULL;
+	}
+
+	raw->rsblock = (RSblock *)calloc(1, sizeof(RSblock));
+	if(raw->rsblock == NULL) {
+		MQRraw_free(raw);
+		return NULL;
+	}
+
+	RSblock_initBlock(raw->rsblock, raw->dataLength, raw->datacode, raw->eccLength, raw->ecccode);
+
+	raw->count = 0;
+
+	return raw;
+}
+
+/**
+ * Return a code (byte).
+ * This function can be called iteratively.
+ * @param raw raw code.
+ * @return code
+ */
+STATIC_IN_RELEASE unsigned char MQRraw_getCode(MQRRawCode *raw)
+{
+	unsigned char ret;
+
+	if(raw->count < raw->dataLength) {
+		ret = raw->datacode[raw->count];
+	} else if(raw->count < raw->dataLength + raw->eccLength) {
+		ret = raw->ecccode[raw->count - raw->dataLength];
+	} else {
+		return 0;
+	}
+	raw->count++;
+	return ret;
+}
+
+STATIC_IN_RELEASE void MQRraw_free(MQRRawCode *raw)
+{
+	if(raw != NULL) {
+		free(raw->datacode);
+		free(raw->ecccode);
+		free(raw->rsblock);
+		free(raw);
+	}
+}
+
+
+/******************************************************************************
+ * Frame filling
+ *****************************************************************************/
+
+typedef struct {
+	int width;
+	unsigned char *frame;
+	int x, y;
+	int dir;
+	int bit;
+	int mqr;
+} FrameFiller;
+
+static void FrameFiller_set(FrameFiller *filler, int width, unsigned char *frame, int mqr)
+{
+	filler->width = width;
+	filler->frame = frame;
+	filler->x = width - 1;
+	filler->y = width - 1;
+	filler->dir = -1;
+	filler->bit = -1;
+	filler->mqr = mqr;
+}
+
+static unsigned char *FrameFiller_next(FrameFiller *filler)
+{
+	unsigned char *p;
+	int x, y, w;
+
+	if(filler->bit == -1) {
+		filler->bit = 0;
+		return filler->frame + filler->y * filler->width + filler->x;
+	}
+
+	x = filler->x;
+	y = filler->y;
+	p = filler->frame;
+	w = filler->width;
+
+	if(filler->bit == 0) {
+		x--;
+		filler->bit++;
+	} else {
+		x++;
+		y += filler->dir;
+		filler->bit--;
+	}
+
+	if(filler->dir < 0) {
+		if(y < 0) {
+			y = 0;
+			x -= 2;
+			filler->dir = 1;
+			if(!filler->mqr && x == 6) {
+				x--;
+				y = 9;
+			}
+		}
+	} else if(y == w) {
+		y = w - 1;
+		x -= 2;
+		filler->dir = -1;
+		if(!filler->mqr && x == 6) {
+			x--;
+			y -= 8;
+		}
+	}
+	if(x < 0 || y < 0) return NULL;
+
+	filler->x = x;
+	filler->y = y;
+
+	if(p[y * w + x] & 0x80) {
+		// This tail recursion could be optimized.
+		return FrameFiller_next(filler);
+	}
+	return &p[y * w + x];
+}
+
+#ifdef WITH_TESTS
+unsigned char *FrameFiller_test(int version)
+{
+	int width;
+	unsigned char *frame, *p;
+	int i, length;
+	FrameFiller filler;
+
+	width = QRspec_getWidth(version);
+	frame = QRspec_newFrame(version);
+	if(frame == NULL) return NULL;
+	FrameFiller_set(&filler, width, frame, 0);
+	length = QRspec_getDataLength(version, QR_ECLEVEL_L) * 8
+	       + QRspec_getECCLength(version, QR_ECLEVEL_L) * 8
+		   + QRspec_getRemainder(version);
+	for(i = 0; i < length; i++) {
+		p = FrameFiller_next(&filler);
+		if(p == NULL) {
+			free(frame);
+			return NULL;
+		}
+		*p = (unsigned char)(i & 0x7f) | 0x80;
+	}
+	return frame;
+}
+
+unsigned char *FrameFiller_testMQR(int version)
+{
+	int width;
+	unsigned char *frame, *p;
+	int i, length;
+	FrameFiller filler;
+
+	width = MQRspec_getWidth(version);
+	frame = MQRspec_newFrame(version);
+	if(frame == NULL) return NULL;
+	FrameFiller_set(&filler, width, frame, 1);
+	length = MQRspec_getDataLengthBit(version, QR_ECLEVEL_L)
+	       + MQRspec_getECCLength(version, QR_ECLEVEL_L) * 8;
+	for(i = 0; i < length; i++) {
+		p = FrameFiller_next(&filler);
+		if(p == NULL) {
+			fprintf(stderr, "Frame filler run over the frame!\n");
+			return frame;
+		}
+		*p = (unsigned char)(i & 0x7f) | 0x80;
+	}
+	return frame;
+}
+#endif
+
+
+/******************************************************************************
+ * QR-code encoding
+ *****************************************************************************/
+
+STATIC_IN_RELEASE QRcode *QRcode_new(int version, int width, unsigned char *data)
+{
+	QRcode *qrcode;
+
+	qrcode = (QRcode *)malloc(sizeof(QRcode));
+	if(qrcode == NULL) return NULL;
+
+	qrcode->version = version;
+	qrcode->width = width;
+	qrcode->data = data;
+
+	return qrcode;
+}
+
+void QRcode_free(QRcode *qrcode)
+{
+	if(qrcode != NULL) {
+		free(qrcode->data);
+		free(qrcode);
+	}
+}
+
+STATIC_IN_RELEASE QRcode *QRcode_encodeMask(QRinput *input, int mask)
+{
+	int width, version;
+	QRRawCode *raw;
+	unsigned char *frame, *masked, *p, code, bit;
+	int i, j;
+	QRcode *qrcode = NULL;
+	FrameFiller filler;
+
+	if(input->mqr) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(input->version < 0 || input->version > QRSPEC_VERSION_MAX) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(input->level > QR_ECLEVEL_H) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	raw = QRraw_new(input);
+	if(raw == NULL) return NULL;
+
+	version = raw->version;
+	width = QRspec_getWidth(version);
+	frame = QRspec_newFrame(version);
+	if(frame == NULL) {
+		QRraw_free(raw);
+		return NULL;
+	}
+	FrameFiller_set(&filler, width, frame, 0);
+
+	/* interleaved data and ecc codes */
+	for(i = 0; i < raw->dataLength; i++) {
+		code = QRraw_getCode(raw);
+		bit = 0x80;
+		for(j = 0; j < 8; j++) {
+			p = FrameFiller_next(&filler);
+			if(p == NULL)  goto EXIT;
+			*p = ((bit & code) != 0);
+			bit = bit >> 1;
+		}
+	}
+	for(i = 0; i < raw->eccLength; i++) {
+		code = QRraw_getCode(raw);
+		bit = 0x80;
+		for(j = 0; j < 8; j++) {
+			p = FrameFiller_next(&filler);
+			if(p == NULL)  goto EXIT;
+			*p = 0x02 | ((bit & code) != 0);
+			bit = bit >> 1;
+		}
+	}
+	QRraw_free(raw);
+	raw = NULL;
+	/* remainder bits */
+	j = QRspec_getRemainder(version);
+	for(i = 0; i < j; i++) {
+		p = FrameFiller_next(&filler);
+		if(p == NULL)  goto EXIT;
+		*p = 0x02;
+	}
+
+	/* masking */
+	if(mask == -2) { // just for debug purpose
+		masked = (unsigned char *)malloc((size_t)(width * width));
+		memcpy(masked, frame, (size_t)(width * width));
+	} else if(mask < 0) {
+		masked = Mask_mask(width, frame, input->level);
+	} else {
+		masked = Mask_makeMask(width, frame, mask, input->level);
+	}
+	if(masked == NULL) {
+		goto EXIT;
+	}
+	qrcode = QRcode_new(version, width, masked);
+	if(qrcode == NULL) {
+		free(masked);
+	}
+
+EXIT:
+	QRraw_free(raw);
+	free(frame);
+	return qrcode;
+}
+
+STATIC_IN_RELEASE QRcode *QRcode_encodeMaskMQR(QRinput *input, int mask)
+{
+	int width, version;
+	MQRRawCode *raw;
+	unsigned char *frame, *masked, *p, code, bit;
+	int i, j, length;
+	QRcode *qrcode = NULL;
+	FrameFiller filler;
+
+	if(!input->mqr) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(input->version <= 0 || input->version > MQRSPEC_VERSION_MAX) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(input->level > QR_ECLEVEL_Q) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	raw = MQRraw_new(input);
+	if(raw == NULL) return NULL;
+
+	version = raw->version;
+	width = MQRspec_getWidth(version);
+	frame = MQRspec_newFrame(version);
+	if(frame == NULL) {
+		MQRraw_free(raw);
+		return NULL;
+	}
+	FrameFiller_set(&filler, width, frame, 1);
+
+	/* interleaved data and ecc codes */
+	for(i = 0; i < raw->dataLength; i++) {
+		code = MQRraw_getCode(raw);
+		bit = 0x80;
+		if(raw->oddbits && i == raw->dataLength - 1) {
+			length = raw->oddbits;
+		} else {
+			length = 8;
+		}
+		for(j = 0; j < length; j++) {
+			p = FrameFiller_next(&filler);
+			if(p == NULL) goto EXIT;
+			*p = ((bit & code) != 0);
+			bit = bit >> 1;
+		}
+	}
+	for(i = 0; i < raw->eccLength; i++) {
+		code = MQRraw_getCode(raw);
+		bit = 0x80;
+		length = 8;
+		for(j = 0; j < length; j++) {
+			p = FrameFiller_next(&filler);
+			if(p == NULL) goto EXIT;
+			*p = 0x02 | ((bit & code) != 0);
+			bit = bit >> 1;
+		}
+	}
+	MQRraw_free(raw);
+	raw = NULL;
+
+	/* masking */
+	if(mask == -2) { // just for debug purpose
+		masked = (unsigned char *)malloc((size_t)(width * width));
+		memcpy(masked, frame, (size_t)(width * width));
+	} else if(mask < 0) {
+		masked = MMask_mask(version, frame, input->level);
+	} else {
+		masked = MMask_makeMask(version, frame, mask, input->level);
+	}
+	if(masked == NULL) {
+		goto EXIT;
+	}
+
+	qrcode = QRcode_new(version, width, masked);
+	if(qrcode == NULL) {
+		free(masked);
+	}
+
+EXIT:
+	MQRraw_free(raw);
+	free(frame);
+	return qrcode;
+}
+
+QRcode *QRcode_encodeInput(QRinput *input)
+{
+	if(input->mqr) {
+		return QRcode_encodeMaskMQR(input, -1);
+	} else {
+		return QRcode_encodeMask(input, -1);
+	}
+}
+
+static QRcode *QRcode_encodeStringReal(const char *string, int version, QRecLevel level, int mqr, QRencodeMode hint, int casesensitive)
+{
+	QRinput *input;
+	QRcode *code;
+	int ret;
+
+	if(string == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(hint != QR_MODE_8 && hint != QR_MODE_KANJI) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if(mqr) {
+		input = QRinput_newMQR(version, level);
+	} else {
+		input = QRinput_new2(version, level);
+	}
+	if(input == NULL) return NULL;
+
+	ret = Split_splitStringToQRinput(string, input, hint, casesensitive);
+	if(ret < 0) {
+		QRinput_free(input);
+		return NULL;
+	}
+	code = QRcode_encodeInput(input);
+	QRinput_free(input);
+
+	return code;
+}
+
+QRcode *QRcode_encodeString(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
+{
+	return QRcode_encodeStringReal(string, version, level, 0, hint, casesensitive);
+}
+
+QRcode *QRcode_encodeStringMQR(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
+{
+	return QRcode_encodeStringReal(string, version, level, 1, hint, casesensitive);
+}
+
+static QRcode *QRcode_encodeDataReal(const unsigned char *data, int length, int version, QRecLevel level, int mqr)
+{
+	QRinput *input;
+	QRcode *code;
+	int ret;
+
+	if(data == NULL || length == 0) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if(mqr) {
+		input = QRinput_newMQR(version, level);
+	} else {
+		input = QRinput_new2(version, level);
+	}
+	if(input == NULL) return NULL;
+
+	ret = QRinput_append(input, QR_MODE_8, length, data);
+	if(ret < 0) {
+		QRinput_free(input);
+		return NULL;
+	}
+	code = QRcode_encodeInput(input);
+	QRinput_free(input);
+
+	return code;
+}
+
+QRcode *QRcode_encodeData(int size, const unsigned char *data, int version, QRecLevel level)
+{
+	return QRcode_encodeDataReal(data, size, version, level, 0);
+}
+
+QRcode *QRcode_encodeString8bit(const char *string, int version, QRecLevel level)
+{
+	if(string == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	return QRcode_encodeDataReal((unsigned char *)string, (int)strlen(string), version, level, 0);
+}
+
+QRcode *QRcode_encodeDataMQR(int size, const unsigned char *data, int version, QRecLevel level)
+{
+	return QRcode_encodeDataReal(data, size, version, level, 1);
+}
+
+QRcode *QRcode_encodeString8bitMQR(const char *string, int version, QRecLevel level)
+{
+	if(string == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	return QRcode_encodeDataReal((unsigned char *)string, (int)strlen(string), version, level, 1);
+}
+
+
+/******************************************************************************
+ * Structured QR-code encoding
+ *****************************************************************************/
+
+static QRcode_List *QRcode_List_newEntry(void)
+{
+	QRcode_List *entry;
+
+	entry = (QRcode_List *)malloc(sizeof(QRcode_List));
+	if(entry == NULL) return NULL;
+
+	entry->next = NULL;
+	entry->code = NULL;
+
+	return entry;
+}
+
+static void QRcode_List_freeEntry(QRcode_List *entry)
+{
+	if(entry != NULL) {
+		QRcode_free(entry->code);
+		free(entry);
+	}
+}
+
+void QRcode_List_free(QRcode_List *qrlist)
+{
+	QRcode_List *list = qrlist, *next;
+
+	while(list != NULL) {
+		next = list->next;
+		QRcode_List_freeEntry(list);
+		list = next;
+	}
+}
+
+int QRcode_List_size(QRcode_List *qrlist)
+{
+	QRcode_List *list = qrlist;
+	int size = 0;
+
+	while(list != NULL) {
+		size++;
+		list = list->next;
+	}
+
+	return size;
+}
+
+#if 0
+static unsigned char QRcode_parity(const char *str, int size)
+{
+	unsigned char parity = 0;
+	int i;
+
+	for(i = 0; i < size; i++) {
+		parity ^= str[i];
+	}
+
+	return parity;
+}
+#endif
+
+QRcode_List *QRcode_encodeInputStructured(QRinput_Struct *s)
+{
+	QRcode_List *head = NULL;
+	QRcode_List *tail = NULL;
+	QRcode_List *entry;
+	QRinput_InputList *list = s->head;
+
+	while(list != NULL) {
+		if(head == NULL) {
+			entry = QRcode_List_newEntry();
+			if(entry == NULL) goto ABORT;
+			head = entry;
+			tail = head;
+		} else {
+			entry = QRcode_List_newEntry();
+			if(entry == NULL) goto ABORT;
+			tail->next = entry;
+			tail = tail->next;
+		}
+		tail->code = QRcode_encodeInput(list->input);
+		if(tail->code == NULL) {
+			goto ABORT;
+		}
+		list = list->next;
+	}
+
+	return head;
+ABORT:
+	QRcode_List_free(head);
+	return NULL;
+}
+
+static QRcode_List *QRcode_encodeInputToStructured(QRinput *input)
+{
+	QRinput_Struct *s;
+	QRcode_List *codes;
+
+	s = QRinput_splitQRinputToStruct(input);
+	if(s == NULL) return NULL;
+
+	codes = QRcode_encodeInputStructured(s);
+	QRinput_Struct_free(s);
+
+	return codes;
+}
+
+static QRcode_List *QRcode_encodeDataStructuredReal(
+	int size, const unsigned char *data,
+	int version, QRecLevel level,
+	int eightbit, QRencodeMode hint, int casesensitive)
+{
+	QRinput *input;
+	QRcode_List *codes;
+	int ret;
+
+	if(version <= 0) {
+		errno = EINVAL;
+		return NULL;
+	}
+	if(!eightbit && (hint != QR_MODE_8 && hint != QR_MODE_KANJI)) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	input = QRinput_new2(version, level);
+	if(input == NULL) return NULL;
+
+	if(eightbit) {
+		ret = QRinput_append(input, QR_MODE_8, size, data);
+	} else {
+		ret = Split_splitStringToQRinput((char *)data, input, hint, casesensitive);
+	}
+	if(ret < 0) {
+		QRinput_free(input);
+		return NULL;
+	}
+	codes = QRcode_encodeInputToStructured(input);
+	QRinput_free(input);
+
+	return codes;
+}
+
+QRcode_List *QRcode_encodeDataStructured(int size, const unsigned char *data, int version, QRecLevel level) {
+	return QRcode_encodeDataStructuredReal(size, data, version, level, 1, QR_MODE_NUL, 0);
+}
+
+QRcode_List *QRcode_encodeString8bitStructured(const char *string, int version, QRecLevel level) {
+	if(string == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	return QRcode_encodeDataStructured((int)strlen(string), (unsigned char *)string, version, level);
+}
+
+QRcode_List *QRcode_encodeStringStructured(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive)
+{
+	if(string == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	return QRcode_encodeDataStructuredReal((int)strlen(string), (unsigned char *)string, version, level, 0, hint, casesensitive);
+}
diff --git a/libs/libqrencode/src/qrencode.def b/libs/libqrencode/src/qrencode.def
new file mode 100644
index 0000000000..7b687a582f
--- /dev/null
+++ b/libs/libqrencode/src/qrencode.def
@@ -0,0 +1,5 @@
+LIBRARY libqrencode.mir
+
+EXPORTS
+   QRcode_encodeString @1
+   QRcode_free         @2
\ No newline at end of file
diff --git a/libs/libqrencode/src/qrencode.h b/libs/libqrencode/src/qrencode.h
new file mode 100644
index 0000000000..55279aaf14
--- /dev/null
+++ b/libs/libqrencode/src/qrencode.h
@@ -0,0 +1,568 @@
+/**
+ * qrencode - QR Code encoder
+ *
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/** \mainpage
+ * Libqrencode is a library for encoding data in a QR Code symbol, a kind of 2D
+ * symbology.
+ *
+ * \section encoding Encoding
+ *
+ * There are two methods to encode data: <b>encoding a string/data</b> or
+ * <b>encoding a structured data</b>.
+ *
+ * \subsection encoding-string Encoding a string/data
+ * You can encode a string by calling QRcode_encodeString().
+ * The given string is parsed automatically and encoded. If you want to encode
+ * data that can be represented as a C string style (NUL terminated), you can
+ * simply use this way.
+ *
+ * If the input data contains Kanji (Shift-JIS) characters and you want to
+ * encode them as Kanji in QR Code, you should give QR_MODE_KANJI as a hint.
+ * Otherwise, all of non-alphanumeric characters are encoded as 8 bit data.
+ * If you want to encode a whole string in 8 bit mode, you can use
+ * QRcode_encodeString8bit() instead.
+ *
+ * Please note that a C string can not contain NUL characters. If your data
+ * contains NUL, you must use QRcode_encodeData().
+ *
+ * \subsection encoding-input Encoding a structured data
+ * You can construct a structured input data manually. If the structure of the
+ * input data is known, you can use this way.
+ * At first, create a ::QRinput object by QRinput_new(). Then add input data
+ * to the QRinput object by QRinput_append(). Finally call QRcode_encodeInput()
+ * to encode the QRinput data.
+ * You can reuse the QRinput data again to encode it in other symbols with
+ * different parameters.
+ *
+ * \section result Result
+ * The encoded symbol is resulted as a ::QRcode object. It will contain
+ * its version number, width of the symbol and an array represents the symbol.
+ * See ::QRcode for the details. You can free the object by QRcode_free().
+ *
+ * Please note that the version of the result may be larger than specified.
+ * In such cases, the input data would be too large to be encoded in a
+ * symbol of the specified version.
+ *
+ * \section structured Structured append
+ * Libqrencode can generate "Structured-appended" symbols that enables to split
+ * a large data set into mulitple QR codes. A QR code reader concatenates
+ * multiple QR code symbols into a string.
+ * Just like QRcode_encodeString(), you can use QRcode_encodeStringStructured()
+ * to generate structured-appended symbols. This functions returns an instance
+ * of ::QRcode_List. The returned list is a singly-linked list of QRcode: you
+ * can retrieve each QR code in this way:
+ *
+ * \code
+ * QRcode_List *qrcodes;
+ * QRcode_List *entry;
+ * QRcode *qrcode;
+ *
+ * qrcodes = QRcode_encodeStringStructured(...);
+ * entry = qrcodes;
+ * while(entry != NULL) {
+ *     qrcode = entry->code;
+ *     // do something
+ *     entry = entry->next;
+ * }
+ * QRcode_List_free(entry);
+ * \endcode
+ *
+ * Instead of using auto-parsing functions, you can construct your own
+ * structured input. At first, instantiate an object of ::QRinput_Struct
+ * by calling QRinput_Struct_new(). This object can hold multiple ::QRinput,
+ * and one QR code is generated for a ::QRinput.
+ * QRinput_Struct_appendInput() appends a ::QRinput to a ::QRinput_Struct
+ * object. In order to generate structured-appended symbols, it is required to
+ * embed headers to each symbol. You can use
+ * QRinput_Struct_insertStructuredAppendHeaders() to insert appropriate
+ * headers to each symbol. You should call this function just once before
+ * encoding symbols.
+ */
+
+#ifndef QRENCODE_H
+#define QRENCODE_H
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/**
+ * Encoding mode.
+ */
+typedef enum {
+	QR_MODE_NUL = -1,   ///< Terminator (NUL character). Internal use only
+	QR_MODE_NUM = 0,    ///< Numeric mode
+	QR_MODE_AN,         ///< Alphabet-numeric mode
+	QR_MODE_8,          ///< 8-bit data mode
+	QR_MODE_KANJI,      ///< Kanji (shift-jis) mode
+	QR_MODE_STRUCTURE,  ///< Internal use only
+	QR_MODE_ECI,        ///< ECI mode
+	QR_MODE_FNC1FIRST,  ///< FNC1, first position
+	QR_MODE_FNC1SECOND, ///< FNC1, second position
+} QRencodeMode;
+
+/**
+ * Level of error correction.
+ */
+typedef enum {
+	QR_ECLEVEL_L = 0, ///< lowest
+	QR_ECLEVEL_M,
+	QR_ECLEVEL_Q,
+	QR_ECLEVEL_H      ///< highest
+} QRecLevel;
+
+/**
+ * Maximum version (size) of QR-code symbol.
+ */
+#define QRSPEC_VERSION_MAX 40
+
+/**
+ * Maximum version (size) of QR-code symbol.
+ */
+#define MQRSPEC_VERSION_MAX 4
+
+
+/******************************************************************************
+ * Input data (qrinput.c)
+ *****************************************************************************/
+
+/**
+ * Singly linked list to contain input strings. An instance of this class
+ * contains its version and error correction level too. It is required to
+ * set them by QRinput_setVersion() and QRinput_setErrorCorrectionLevel(),
+ * or use QRinput_new2() to instantiate an object.
+ */
+typedef struct _QRinput QRinput;
+
+/**
+ * Instantiate an input data object. The version is set to 0 (auto-select)
+ * and the error correction level is set to QR_ECLEVEL_L.
+ * @return an input object (initialized). On error, NULL is returned and errno
+ *         is set to indicate the error.
+ * @throw ENOMEM unable to allocate memory.
+ */
+extern QRinput *QRinput_new(void);
+
+/**
+ * Instantiate an input data object.
+ * @param version version number.
+ * @param level Error correction level.
+ * @return an input object (initialized). On error, NULL is returned and errno
+ *         is set to indicate the error.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ * @throw EINVAL invalid arguments.
+ */
+extern QRinput *QRinput_new2(int version, QRecLevel level);
+
+/**
+ * Instantiate an input data object. Object's Micro QR Code flag is set.
+ * Unlike with full-sized QR Code, version number must be specified (>0).
+ * @param version version number (1--4).
+ * @param level Error correction level.
+ * @return an input object (initialized). On error, NULL is returned and errno
+ *         is set to indicate the error.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ * @throw EINVAL invalid arguments.
+ */
+extern QRinput *QRinput_newMQR(int version, QRecLevel level);
+
+/**
+ * Append data to an input object.
+ * The data is copied and appended to the input object.
+ * @param input input object.
+ * @param mode encoding mode.
+ * @param size size of data (byte).
+ * @param data a pointer to the memory area of the input data.
+ * @retval 0 success.
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL input data is invalid.
+ *
+ */
+extern int QRinput_append(QRinput *input, QRencodeMode mode, int size, const unsigned char *data);
+
+/**
+ * Append ECI header.
+ * @param input input object.
+ * @param ecinum ECI indicator number (0 - 999999)
+ * @retval 0 success.
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL input data is invalid.
+ *
+ */
+extern int QRinput_appendECIheader(QRinput *input, unsigned int ecinum);
+
+/**
+ * Get current version.
+ * @param input input object.
+ * @return current version.
+ */
+extern int QRinput_getVersion(QRinput *input);
+
+/**
+ * Set version of the QR code that is to be encoded.
+ * This function cannot be applied to Micro QR Code.
+ * @param input input object.
+ * @param version version number (0 = auto)
+ * @retval 0 success.
+ * @retval -1 invalid argument.
+ */
+extern int QRinput_setVersion(QRinput *input, int version);
+
+/**
+ * Get current error correction level.
+ * @param input input object.
+ * @return Current error correcntion level.
+ */
+extern QRecLevel QRinput_getErrorCorrectionLevel(QRinput *input);
+
+/**
+ * Set error correction level of the QR code that is to be encoded.
+ * This function cannot be applied to Micro QR Code.
+ * @param input input object.
+ * @param level Error correction level.
+ * @retval 0 success.
+ * @retval -1 invalid argument.
+ */
+extern int QRinput_setErrorCorrectionLevel(QRinput *input, QRecLevel level);
+
+/**
+ * Set version and error correction level of the QR code at once.
+ * This function is recommened for Micro QR Code.
+ * @param input input object.
+ * @param version version number (0 = auto)
+ * @param level Error correction level.
+ * @retval 0 success.
+ * @retval -1 invalid argument.
+ */
+extern int QRinput_setVersionAndErrorCorrectionLevel(QRinput *input, int version, QRecLevel level);
+
+/**
+ * Free the input object.
+ * All of data chunks in the input object are freed too.
+ * @param input input object.
+ */
+extern void QRinput_free(QRinput *input);
+
+/**
+ * Validate the input data.
+ * @param mode encoding mode.
+ * @param size size of data (byte).
+ * @param data a pointer to the memory area of the input data.
+ * @retval 0 success.
+ * @retval -1 invalid arguments.
+ */
+extern int QRinput_check(QRencodeMode mode, int size, const unsigned char *data);
+
+/**
+ * Set of QRinput for structured symbols.
+ */
+typedef struct _QRinput_Struct QRinput_Struct;
+
+/**
+ * Instantiate a set of input data object.
+ * @return an instance of QRinput_Struct. On error, NULL is returned and errno
+ *         is set to indicate the error.
+ * @throw ENOMEM unable to allocate memory.
+ */
+extern QRinput_Struct *QRinput_Struct_new(void);
+
+/**
+ * Set parity of structured symbols.
+ * @param s structured input object.
+ * @param parity parity of s.
+ */
+extern void QRinput_Struct_setParity(QRinput_Struct *s, unsigned char parity);
+
+/**
+ * Append a QRinput object to the set. QRinput created by QRinput_newMQR()
+ * will be rejected.
+ * @warning never append the same QRinput object twice or more.
+ * @param s structured input object.
+ * @param input an input object.
+ * @retval >0 number of input objects in the structure.
+ * @retval -1 an error occurred. See Exceptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL invalid arguments.
+ */
+extern int QRinput_Struct_appendInput(QRinput_Struct *s, QRinput *input);
+
+/**
+ * Free all of QRinput in the set.
+ * @param s a structured input object.
+ */
+extern void QRinput_Struct_free(QRinput_Struct *s);
+
+/**
+ * Split a QRinput to QRinput_Struct. It calculates a parity, set it, then
+ * insert structured-append headers. QRinput created by QRinput_newMQR() will
+ * be rejected.
+ * @param input input object. Version number and error correction level must be
+ *        set.
+ * @return a set of input data. On error, NULL is returned, and errno is set
+ *         to indicate the error. See Exceptions for the details.
+ * @throw ERANGE input data is too large.
+ * @throw EINVAL invalid input data.
+ * @throw ENOMEM unable to allocate memory.
+ */
+extern QRinput_Struct *QRinput_splitQRinputToStruct(QRinput *input);
+
+/**
+ * Insert structured-append headers to the input structure. It calculates
+ * a parity and set it if the parity is not set yet.
+ * @param s input structure
+ * @retval 0 success.
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory.
+ */
+extern int QRinput_Struct_insertStructuredAppendHeaders(QRinput_Struct *s);
+
+/**
+ * Set FNC1-1st position flag.
+ */
+extern int QRinput_setFNC1First(QRinput *input);
+
+/**
+ * Set FNC1-2nd position flag and application identifier.
+ */
+extern int QRinput_setFNC1Second(QRinput *input, unsigned char appid);
+
+/******************************************************************************
+ * QRcode output (qrencode.c)
+ *****************************************************************************/
+
+/**
+ * QRcode class.
+ * Symbol data is represented as an array contains width*width uchars.
+ * Each uchar represents a module (dot). If the less significant bit of
+ * the uchar is 1, the corresponding module is black. The other bits are
+ * meaningless for usual applications, but here its specification is described.
+ *
+ * @verbatim
+   MSB 76543210 LSB
+       |||||||`- 1=black/0=white
+       ||||||`-- 1=ecc/0=data code area
+       |||||`--- format information
+       ||||`---- version information
+       |||`----- timing pattern
+       ||`------ alignment pattern
+       |`------- finder pattern and separator
+       `-------- non-data modules (format, timing, etc.)
+   @endverbatim
+ */
+typedef struct {
+	int version;         ///< version of the symbol
+	int width;           ///< width of the symbol
+	unsigned char *data; ///< symbol data
+} QRcode;
+
+/**
+ * Singly-linked list of QRcode. Used to represent a structured symbols.
+ * A list is terminated with NULL.
+ */
+typedef struct _QRcode_List {
+	QRcode *code;
+	struct _QRcode_List *next;
+} QRcode_List;
+
+/**
+ * Create a symbol from the input data.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param input input data.
+ * @return an instance of QRcode class. The version of the result QRcode may
+ *         be larger than the designated version. On error, NULL is returned,
+ *         and errno is set to indicate the error. See Exceptions for the
+ *         details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ */
+extern QRcode *QRcode_encodeInput(QRinput *input);
+
+/**
+ * Create a symbol from the string. The library automatically parses the input
+ * string and encodes in a QR Code symbol.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param string input string. It must be NUL terminated.
+ * @param version version of the symbol. If 0, the library chooses the minimum
+ *                version for the given input data.
+ * @param level error correction level.
+ * @param hint tell the library how Japanese Kanji characters should be
+ *             encoded. If QR_MODE_KANJI is given, the library assumes that the
+ *             given string contains Shift-JIS characters and encodes them in
+ *             Kanji-mode. If QR_MODE_8 is given, all of non-alphanumerical
+ *             characters will be encoded as is. If you want to embed UTF-8
+ *             string, choose this. Other mode will cause EINVAL error.
+ * @param casesensitive case-sensitive(1) or not(0).
+ * @return an instance of QRcode class. The version of the result QRcode may
+ *         be larger than the designated version. On error, NULL is returned,
+ *         and errno is set to indicate the error. See Exceptions for the
+ *         details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ * @throw ERANGE input data is too large.
+ */
+extern QRcode *QRcode_encodeString(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive);
+
+/**
+ * Same to QRcode_encodeString(), but encode whole data in 8-bit mode.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ */
+extern QRcode *QRcode_encodeString8bit(const char *string, int version, QRecLevel level);
+
+/**
+ * Micro QR Code version of QRcode_encodeString().
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ */
+extern QRcode *QRcode_encodeStringMQR(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive);
+
+/**
+ * Micro QR Code version of QRcode_encodeString8bit().
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ */
+extern QRcode *QRcode_encodeString8bitMQR(const char *string, int version, QRecLevel level);
+
+/**
+ * Encode byte stream (may include '\0') in 8-bit mode.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param size size of the input data.
+ * @param data input data.
+ * @param version version of the symbol. If 0, the library chooses the minimum
+ *                version for the given input data.
+ * @param level error correction level.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ * @throw ERANGE input data is too large.
+ */
+extern QRcode *QRcode_encodeData(int size, const unsigned char *data, int version, QRecLevel level);
+
+/**
+ * Micro QR Code version of QRcode_encodeData().
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ */
+extern QRcode *QRcode_encodeDataMQR(int size, const unsigned char *data, int version, QRecLevel level);
+
+/**
+ * Free the instance of QRcode class.
+ * @param qrcode an instance of QRcode class.
+ */
+extern void QRcode_free(QRcode *qrcode);
+
+/**
+ * Create structured symbols from the input data.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param s input data, structured.
+ * @return a singly-linked list of QRcode.
+ */
+extern QRcode_List *QRcode_encodeInputStructured(QRinput_Struct *s);
+
+/**
+ * Create structured symbols from the string. The library automatically parses
+ * the input string and encodes in a QR Code symbol.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param string input string. It must be NUL terminated.
+ * @param version version of the symbol.
+ * @param level error correction level.
+ * @param hint tell the library how Japanese Kanji characters should be
+ *             encoded. If QR_MODE_KANJI is given, the library assumes that the
+ *             given string contains Shift-JIS characters and encodes them in
+ *             Kanji-mode. If QR_MODE_8 is given, all of non-alphanumerical
+ *             characters will be encoded as is. If you want to embed UTF-8
+ *             string, choose this. Other mode will cause EINVAL error.
+ * @param casesensitive case-sensitive(1) or not(0).
+ * @return a singly-linked list of QRcode. On error, NULL is returned, and
+ *         errno is set to indicate the error. See Exceptions for the details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ */
+extern QRcode_List *QRcode_encodeStringStructured(const char *string, int version, QRecLevel level, QRencodeMode hint, int casesensitive);
+
+/**
+ * Same to QRcode_encodeStringStructured(), but encode whole data in 8-bit mode.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ */
+extern QRcode_List *QRcode_encodeString8bitStructured(const char *string, int version, QRecLevel level);
+
+/**
+ * Create structured symbols from byte stream (may include '\0'). Wholde data
+ * are encoded in 8-bit mode.
+ * @warning This function is THREAD UNSAFE when pthread is disabled.
+ * @param size size of the input data.
+ * @param data input dat.
+ * @param version version of the symbol.
+ * @param level error correction level.
+ * @return a singly-linked list of QRcode. On error, NULL is returned, and
+ *         errno is set to indicate the error. See Exceptions for the details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ */
+extern QRcode_List *QRcode_encodeDataStructured(int size, const unsigned char *data, int version, QRecLevel level);
+
+/**
+ * Return the number of symbols included in a QRcode_List.
+ * @param qrlist a head entry of a QRcode_List.
+ * @return number of symbols in the list.
+ */
+extern int QRcode_List_size(QRcode_List *qrlist);
+
+/**
+ * Free the QRcode_List.
+ * @param qrlist a head entry of a QRcode_List.
+ */
+extern void QRcode_List_free(QRcode_List *qrlist);
+
+
+/******************************************************************************
+ * System utilities
+ *****************************************************************************/
+
+/**
+ * Return a string that identifies the library version.
+ * @param major_version major version number
+ * @param minor_version minor version number
+ * @param micro_version micro version number
+ */
+extern void QRcode_APIVersion(int *major_version, int *minor_version, int *micro_version);
+
+/**
+ * Return a string that identifies the library version.
+ * @return a string identifies the library version. The string is held by the
+ * library. Do NOT free it.
+ */
+extern char *QRcode_APIVersionString(void);
+
+/**
+ * @deprecated
+ */
+#ifndef _MSC_VER
+extern void QRcode_clearCache(void) __attribute__ ((deprecated));
+#else
+extern void QRcode_clearCache(void);
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* QRENCODE_H */
diff --git a/libs/libqrencode/src/qrencode_inner.h b/libs/libqrencode/src/qrencode_inner.h
new file mode 100644
index 0000000000..2ea54f59d0
--- /dev/null
+++ b/libs/libqrencode/src/qrencode_inner.h
@@ -0,0 +1,88 @@
+/**
+ * qrencode - QR Code encoder
+ *
+ * Header for test use
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef QRENCODE_INNER_H
+#define QRENCODE_INNER_H
+
+/**
+ * This header file includes definitions for test use.
+ */
+
+/******************************************************************************
+ * Raw code
+ *****************************************************************************/
+
+typedef struct {
+	int dataLength;
+	int eccLength;
+	unsigned char *data;
+	unsigned char *ecc;
+} RSblock;
+
+typedef struct {
+	int version;
+	int dataLength;
+	int eccLength;
+	unsigned char *datacode;
+	unsigned char *ecccode;
+	int b1;
+	int blocks;
+	RSblock *rsblock;
+	int count;
+} QRRawCode;
+
+extern QRRawCode *QRraw_new(QRinput *input);
+extern unsigned char QRraw_getCode(QRRawCode *raw);
+extern void QRraw_free(QRRawCode *raw);
+
+/******************************************************************************
+ * Raw code for Micro QR Code
+ *****************************************************************************/
+
+typedef struct {
+	int version;
+	int dataLength;
+	int eccLength;
+	unsigned char *datacode;
+	unsigned char *ecccode;
+	RSblock *rsblock;
+	int oddbits;
+	int count;
+} MQRRawCode;
+
+extern MQRRawCode *MQRraw_new(QRinput *input);
+extern unsigned char MQRraw_getCode(MQRRawCode *raw);
+extern void MQRraw_free(MQRRawCode *raw);
+
+/******************************************************************************
+ * Frame filling
+ *****************************************************************************/
+extern unsigned char *FrameFiller_test(int version);
+extern unsigned char *FrameFiller_testMQR(int version);
+
+/******************************************************************************
+ * QR-code encoding
+ *****************************************************************************/
+extern QRcode *QRcode_encodeMask(QRinput *input, int mask);
+extern QRcode *QRcode_encodeMaskMQR(QRinput *input, int mask);
+extern QRcode *QRcode_new(int version, int width, unsigned char *data);
+
+#endif /* QRENCODE_INNER_H */
diff --git a/libs/libqrencode/src/qrinput.c b/libs/libqrencode/src/qrinput.c
new file mode 100644
index 0000000000..f6a3a3cdd7
--- /dev/null
+++ b/libs/libqrencode/src/qrinput.c
@@ -0,0 +1,1628 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Input data chunk class
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "qrencode.h"
+#include "qrspec.h"
+#include "mqrspec.h"
+#include "bitstream.h"
+#include "qrinput.h"
+
+/******************************************************************************
+ * Utilities
+ *****************************************************************************/
+int QRinput_isSplittableMode(QRencodeMode mode)
+{
+	return (mode >= QR_MODE_NUM && mode <= QR_MODE_KANJI);
+}
+
+/******************************************************************************
+ * Entry of input data
+ *****************************************************************************/
+
+static QRinput_List *QRinput_List_newEntry(QRencodeMode mode, int size, const unsigned char *data)
+{
+	QRinput_List *entry;
+
+	if(QRinput_check(mode, size, data)) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	entry = (QRinput_List *)malloc(sizeof(QRinput_List));
+	if(entry == NULL) return NULL;
+
+	entry->mode = mode;
+	entry->size = size;
+	entry->data = NULL;
+	if(size > 0) {
+		entry->data = (unsigned char *)malloc((size_t)size);
+		if(entry->data == NULL) {
+			free(entry);
+			return NULL;
+		}
+		memcpy(entry->data, data, (size_t)size);
+	}
+	entry->bstream = NULL;
+	entry->next = NULL;
+
+	return entry;
+}
+
+static void QRinput_List_freeEntry(QRinput_List *entry)
+{
+	if(entry != NULL) {
+		free(entry->data);
+		BitStream_free(entry->bstream);
+		free(entry);
+	}
+}
+
+static QRinput_List *QRinput_List_dup(QRinput_List *entry)
+{
+	QRinput_List *n;
+
+	n = (QRinput_List *)malloc(sizeof(QRinput_List));
+	if(n == NULL) return NULL;
+
+	n->mode = entry->mode;
+	n->size = entry->size;
+	n->data = (unsigned char *)malloc((size_t)n->size);
+	if(n->data == NULL) {
+		free(n);
+		return NULL;
+	}
+	memcpy(n->data, entry->data, (size_t)entry->size);
+	n->bstream = NULL;
+	n->next = NULL;
+
+	return n;
+}
+
+/******************************************************************************
+ * Input Data
+ *****************************************************************************/
+
+QRinput *QRinput_new(void)
+{
+	return QRinput_new2(0, QR_ECLEVEL_L);
+}
+
+QRinput *QRinput_new2(int version, QRecLevel level)
+{
+	QRinput *input;
+
+	if(version < 0 || version > QRSPEC_VERSION_MAX || level > QR_ECLEVEL_H) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	input = (QRinput *)malloc(sizeof(QRinput));
+	if(input == NULL) return NULL;
+
+	input->head = NULL;
+	input->tail = NULL;
+	input->version = version;
+	input->level = level;
+	input->mqr = 0;
+	input->fnc1 = 0;
+
+	return input;
+}
+
+QRinput *QRinput_newMQR(int version, QRecLevel level)
+{
+	QRinput *input;
+
+	if(version <= 0 || version > MQRSPEC_VERSION_MAX) goto INVALID;
+	if((MQRspec_getECCLength(version, level) == 0)) goto INVALID;
+
+	input = QRinput_new2(version, level);
+	if(input == NULL) return NULL;
+
+	input->mqr = 1;
+
+	return input;
+
+INVALID:
+	errno = EINVAL;
+	return NULL;
+}
+
+int QRinput_getVersion(QRinput *input)
+{
+	return input->version;
+}
+
+int QRinput_setVersion(QRinput *input, int version)
+{
+	if(input->mqr || version < 0 || version > QRSPEC_VERSION_MAX) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	input->version = version;
+
+	return 0;
+}
+
+QRecLevel QRinput_getErrorCorrectionLevel(QRinput *input)
+{
+	return input->level;
+}
+
+int QRinput_setErrorCorrectionLevel(QRinput *input, QRecLevel level)
+{
+	if(input->mqr || level > QR_ECLEVEL_H) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	input->level = level;
+
+	return 0;
+}
+
+int QRinput_setVersionAndErrorCorrectionLevel(QRinput *input, int version, QRecLevel level)
+{
+	if(input->mqr) {
+		if(version <= 0 || version > MQRSPEC_VERSION_MAX) goto INVALID;
+		if((MQRspec_getECCLength(version, level) == 0)) goto INVALID;
+	} else {
+		if(version < 0 || version > QRSPEC_VERSION_MAX) goto INVALID;
+		if(level > QR_ECLEVEL_H) goto INVALID;
+	}
+
+	input->version = version;
+	input->level = level;
+
+	return 0;
+
+INVALID:
+	errno = EINVAL;
+	return -1;
+}
+
+static void QRinput_appendEntry(QRinput *input, QRinput_List *entry)
+{
+	if(input->tail == NULL) {
+		input->head = entry;
+		input->tail = entry;
+	} else {
+		input->tail->next = entry;
+		input->tail = entry;
+	}
+	entry->next = NULL;
+}
+
+int QRinput_append(QRinput *input, QRencodeMode mode, int size, const unsigned char *data)
+{
+	QRinput_List *entry;
+
+	entry = QRinput_List_newEntry(mode, size, data);
+	if(entry == NULL) {
+		return -1;
+	}
+
+	QRinput_appendEntry(input, entry);
+
+	return 0;
+}
+
+/**
+ * Insert a structured-append header to the head of the input data.
+ * @param input input data.
+ * @param size number of structured symbols.
+ * @param number index number of the symbol. (1 <= number <= size)
+ * @param parity parity among input data. (NOTE: each symbol of a set of structured symbols has the same parity data)
+ * @retval 0 success.
+ * @retval -1 error occurred and errno is set to indeicate the error. See Execptions for the details.
+ * @throw EINVAL invalid parameter.
+ * @throw ENOMEM unable to allocate memory.
+ */
+STATIC_IN_RELEASE int QRinput_insertStructuredAppendHeader(QRinput *input, int size, int number, unsigned char parity)
+{
+	QRinput_List *entry;
+	unsigned char buf[3];
+
+	if(size > MAX_STRUCTURED_SYMBOLS) {
+		errno = EINVAL;
+		return -1;
+	}
+	if(number <= 0 || number > size) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	buf[0] = (unsigned char)size;
+	buf[1] = (unsigned char)number;
+	buf[2] = parity;
+	entry = QRinput_List_newEntry(QR_MODE_STRUCTURE, 3, buf);
+	if(entry == NULL) {
+		return -1;
+	}
+
+	entry->next = input->head;
+	input->head = entry;
+
+	return 0;
+}
+
+int QRinput_appendECIheader(QRinput *input, unsigned int ecinum)
+{
+	unsigned char data[4];
+
+	if(ecinum > 999999) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	/* We manually create byte array of ecinum because
+	 (unsigned char *)&ecinum may cause bus error on some architectures, */
+	data[0] = ecinum & 0xff;
+	data[1] = (ecinum >>  8) & 0xff;
+	data[2] = (ecinum >> 16) & 0xff;
+	data[3] = (ecinum >> 24) & 0xff;
+	return QRinput_append(input, QR_MODE_ECI, 4, data);
+}
+
+void QRinput_free(QRinput *input)
+{
+	QRinput_List *list, *next;
+
+	if(input != NULL) {
+		list = input->head;
+		while(list != NULL) {
+			next = list->next;
+			QRinput_List_freeEntry(list);
+			list = next;
+		}
+		free(input);
+	}
+}
+
+static unsigned char QRinput_calcParity(QRinput *input)
+{
+	unsigned char parity = 0;
+	QRinput_List *list;
+	int i;
+
+	list = input->head;
+	while(list != NULL) {
+		if(list->mode != QR_MODE_STRUCTURE) {
+			for(i = list->size-1; i >= 0; i--) {
+				parity ^= list->data[i];
+			}
+		}
+		list = list->next;
+	}
+
+	return parity;
+}
+
+QRinput *QRinput_dup(QRinput *input)
+{
+	QRinput *n;
+	QRinput_List *list, *e;
+
+	if(input->mqr) {
+		n = QRinput_newMQR(input->version, input->level);
+	} else {
+		n = QRinput_new2(input->version, input->level);
+	}
+	if(n == NULL) return NULL;
+
+	list = input->head;
+	while(list != NULL) {
+		e = QRinput_List_dup(list);
+		if(e == NULL) {
+			QRinput_free(n);
+			return NULL;
+		}
+		QRinput_appendEntry(n, e);
+		list = list->next;
+	}
+
+	return n;
+}
+
+/******************************************************************************
+ * Numeric data
+ *****************************************************************************/
+
+/**
+ * Check the input data.
+ * @param size
+ * @param data
+ * @return result
+ */
+static int QRinput_checkModeNum(int size, const char *data)
+{
+	int i;
+
+	for(i = 0; i < size; i++) {
+		if(data[i] < '0' || data[i] > '9')
+			return -1;
+	}
+
+	return 0;
+}
+
+/**
+ * Estimate the length of the encoded bit stream of numeric data.
+ * @param size
+ * @return number of bits
+ */
+int QRinput_estimateBitsModeNum(int size)
+{
+	int w;
+	int bits;
+
+	w = size / 3;
+	bits = w * 10;
+	switch(size - w * 3) {
+		case 1:
+			bits += 4;
+			break;
+		case 2:
+			bits += 7;
+			break;
+		default:
+			break;
+	}
+
+	return bits;
+}
+
+/**
+ * Convert the number data and append to a bit stream.
+ * @param entry
+ * @param mqr
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ */
+static int QRinput_encodeModeNum(QRinput_List *entry, BitStream *bstream, int version, int mqr)
+{
+	int words, i, ret;
+	unsigned int val;
+
+	if(mqr) {
+		if(version > 1) {
+			ret = BitStream_appendNum(bstream, (size_t)(version - 1), MQRSPEC_MODEID_NUM);
+			if(ret < 0) return -1;
+		}
+		ret = BitStream_appendNum(bstream, (size_t)MQRspec_lengthIndicator(QR_MODE_NUM, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	} else {
+		ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_NUM);
+		if(ret < 0) return -1;
+
+		ret = BitStream_appendNum(bstream, (size_t)QRspec_lengthIndicator(QR_MODE_NUM, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	}
+
+	words = entry->size / 3;
+	for(i = 0; i < words; i++) {
+		val  = (unsigned int)(entry->data[i*3  ] - '0') * 100;
+		val += (unsigned int)(entry->data[i*3+1] - '0') * 10;
+		val += (unsigned int)(entry->data[i*3+2] - '0');
+
+		ret = BitStream_appendNum(bstream, 10, val);
+		if(ret < 0) return -1;
+	}
+
+	if(entry->size - words * 3 == 1) {
+		val = (unsigned int)(entry->data[words*3] - '0');
+		ret = BitStream_appendNum(bstream, 4, val);
+		if(ret < 0) return -1;
+	} else if(entry->size - words * 3 == 2) {
+		val  = (unsigned int)(entry->data[words*3  ] - '0') * 10;
+		val += (unsigned int)(entry->data[words*3+1] - '0');
+		BitStream_appendNum(bstream, 7, val);
+		if(ret < 0) return -1;
+	}
+
+	return 0;
+}
+
+/******************************************************************************
+ * Alphabet-numeric data
+ *****************************************************************************/
+
+const signed char QRinput_anTable[128] = {
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43,
+	 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 44, -1, -1, -1, -1, -1,
+	-1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+	25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+};
+
+/**
+ * Check the input data.
+ * @param size
+ * @param data
+ * @return result
+ */
+static int QRinput_checkModeAn(int size, const char *data)
+{
+	int i;
+
+	for(i = 0; i < size; i++) {
+		if(QRinput_lookAnTable(data[i]) < 0)
+			return -1;
+	}
+
+	return 0;
+}
+
+/**
+ * Estimate the length of the encoded bit stream of alphabet-numeric data.
+ * @param size
+ * @return number of bits
+ */
+int QRinput_estimateBitsModeAn(int size)
+{
+	int w;
+	int bits;
+
+	w = size / 2;
+	bits = w * 11;
+	if(size & 1) {
+		bits += 6;
+	}
+
+	return bits;
+}
+
+/**
+ * Convert the alphabet-numeric data and append to a bit stream.
+ * @param entry
+ * @param mqr
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL invalid version.
+ */
+static int QRinput_encodeModeAn(QRinput_List *entry, BitStream *bstream, int version, int mqr)
+{
+	int words, i, ret;
+	unsigned int val;
+
+	if(mqr) {
+		if(version < 2) {
+			errno = EINVAL;
+			return -1;
+		}
+		ret = BitStream_appendNum(bstream, (size_t)(version - 1), MQRSPEC_MODEID_AN);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)MQRspec_lengthIndicator(QR_MODE_AN, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	} else {
+		ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_AN);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)QRspec_lengthIndicator(QR_MODE_AN, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	}
+
+	words = entry->size / 2;
+	for(i = 0; i < words; i++) {
+		val  = (unsigned int)QRinput_lookAnTable(entry->data[i*2  ]) * 45;
+		val += (unsigned int)QRinput_lookAnTable(entry->data[i*2+1]);
+
+		ret = BitStream_appendNum(bstream, 11, val);
+		if(ret < 0) return -1;
+	}
+
+	if(entry->size & 1) {
+		val = (unsigned int)QRinput_lookAnTable(entry->data[words * 2]);
+
+		ret = BitStream_appendNum(bstream, 6, val);
+		if(ret < 0) return -1;
+	}
+
+	return 0;
+}
+
+/******************************************************************************
+ * 8 bit data
+ *****************************************************************************/
+
+/**
+ * Estimate the length of the encoded bit stream of 8 bit data.
+ * @param size
+ * @return number of bits
+ */
+int QRinput_estimateBitsMode8(int size)
+{
+	return size * 8;
+}
+
+/**
+ * Convert the 8bits data and append to a bit stream.
+ * @param entry
+ * @param mqr
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ */
+static int QRinput_encodeMode8(QRinput_List *entry, BitStream *bstream, int version, int mqr)
+{
+	int ret;
+
+	if(mqr) {
+		if(version < 3) {
+			errno = EINVAL;
+			return -1;
+		}
+		ret = BitStream_appendNum(bstream, (size_t)(version - 1), MQRSPEC_MODEID_8);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)MQRspec_lengthIndicator(QR_MODE_8, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	} else {
+		ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_8);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)QRspec_lengthIndicator(QR_MODE_8, version), (unsigned int)entry->size);
+		if(ret < 0) return -1;
+	}
+
+	ret = BitStream_appendBytes(bstream, (size_t)entry->size, entry->data);
+	if(ret < 0) return -1;
+
+	return 0;
+}
+
+
+/******************************************************************************
+ * Kanji data
+ *****************************************************************************/
+
+/**
+ * Estimate the length of the encoded bit stream of kanji data.
+ * @param size
+ * @return number of bits
+ */
+int QRinput_estimateBitsModeKanji(int size)
+{
+	return (size / 2) * 13;
+}
+
+/**
+ * Check the input data.
+ * @param size
+ * @param data
+ * @return result
+ */
+static int QRinput_checkModeKanji(int size, const unsigned char *data)
+{
+	int i;
+	unsigned int val;
+
+	if(size & 1)
+		return -1;
+
+	for(i = 0; i < size; i+=2) {
+		val = ((unsigned int)data[i] << 8) | data[i+1];
+		if(val < 0x8140 || (val > 0x9ffc && val < 0xe040) || val > 0xebbf) {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * Convert the kanji data and append to a bit stream.
+ * @param entry
+ * @param mqr
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL invalid version.
+ */
+static int QRinput_encodeModeKanji(QRinput_List *entry, BitStream *bstream, int version, int mqr)
+{
+	int ret, i;
+	unsigned int val, h;
+
+	if(mqr) {
+		if(version < 2) {
+			errno = EINVAL;
+			return -1;
+		}
+		ret = BitStream_appendNum(bstream, (size_t)(version - 1), MQRSPEC_MODEID_KANJI);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)MQRspec_lengthIndicator(QR_MODE_KANJI, version), (unsigned int)entry->size/2);
+		if(ret < 0) return -1;
+	} else {
+		ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_KANJI);
+		if(ret < 0) return -1;
+		ret = BitStream_appendNum(bstream, (size_t)QRspec_lengthIndicator(QR_MODE_KANJI, version), (unsigned int)entry->size/2);
+		if(ret < 0) return -1;
+	}
+
+	for(i = 0; i < entry->size; i+=2) {
+		val = ((unsigned int)entry->data[i] << 8) | entry->data[i+1];
+		if(val <= 0x9ffc) {
+			val -= 0x8140;
+		} else {
+			val -= 0xc140;
+		}
+		h = (val >> 8) * 0xc0;
+		val = (val & 0xff) + h;
+
+		ret = BitStream_appendNum(bstream, 13, val);
+		if(ret < 0) return -1;
+	}
+
+	return 0;
+}
+
+/******************************************************************************
+ * Structured Symbol
+ *****************************************************************************/
+
+/**
+ * Convert a structure symbol code and append to a bit stream.
+ * @param entry
+ * @param mqr
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw EINVAL invalid entry.
+ */
+static int QRinput_encodeModeStructure(QRinput_List *entry, BitStream *bstream, int mqr)
+{
+	int ret;
+
+	if(mqr) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_STRUCTURE);
+	if(ret < 0) return -1;
+	ret = BitStream_appendNum(bstream, 4, entry->data[1] - 1U);
+	if(ret < 0) return -1;
+	ret = BitStream_appendNum(bstream, 4, entry->data[0] - 1U);
+	if(ret < 0) return -1;
+	ret = BitStream_appendNum(bstream, 8, entry->data[2]);
+	if(ret < 0) return -1;
+
+	return 0;
+}
+
+/******************************************************************************
+ * FNC1
+ *****************************************************************************/
+
+static int QRinput_checkModeFNC1Second(int size)
+{
+	if(size != 1) return -1;
+
+	/* No data check required. */
+
+	return 0;
+}
+
+static int QRinput_encodeModeFNC1Second(QRinput_List *entry, BitStream *bstream)
+{
+	int ret;
+
+	ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_FNC1SECOND);
+	if(ret < 0) return -1;
+
+	ret = BitStream_appendBytes(bstream, 1, entry->data);
+	if(ret < 0) return -1;
+
+	return 0;
+}
+
+/******************************************************************************
+ * ECI header
+ *****************************************************************************/
+static unsigned int QRinput_decodeECIfromByteArray(unsigned char *data)
+{
+	int i;
+	unsigned int ecinum;
+
+	ecinum = 0;
+	for(i = 0; i < 4; i++) {
+		ecinum = ecinum << 8;
+		ecinum |= data[3-i];
+	}
+
+	return ecinum;
+}
+
+static int QRinput_estimateBitsModeECI(unsigned char *data)
+{
+	unsigned int ecinum;
+
+	ecinum = QRinput_decodeECIfromByteArray(data);
+
+	/* See Table 4 of JISX 0510:2004 pp.17. */
+	if(ecinum < 128) {
+		return MODE_INDICATOR_SIZE + 8;
+	} else if(ecinum < 16384) {
+		return MODE_INDICATOR_SIZE + 16;
+	} else {
+		return MODE_INDICATOR_SIZE + 24;
+	}
+}
+
+static int QRinput_encodeModeECI(QRinput_List *entry, BitStream *bstream)
+{
+	int ret, words;
+	unsigned int ecinum, code;
+
+	ecinum = QRinput_decodeECIfromByteArray(entry->data);
+
+	/* See Table 4 of JISX 0510:2004 pp.17. */
+	if(ecinum < 128) {
+		words = 1;
+		code = ecinum;
+	} else if(ecinum < 16384) {
+		words = 2;
+		code = 0x8000 + ecinum;
+	} else {
+		words = 3;
+		code = 0xc0000 + ecinum;
+	}
+
+	ret = BitStream_appendNum(bstream, 4, QRSPEC_MODEID_ECI);
+	if(ret < 0) return -1;
+
+	ret = BitStream_appendNum(bstream, (size_t)words * 8, code);
+	if(ret < 0) return -1;
+
+	return 0;
+}
+
+/******************************************************************************
+ * Validation
+ *****************************************************************************/
+
+int QRinput_check(QRencodeMode mode, int size, const unsigned char *data)
+{
+	if((mode == QR_MODE_FNC1FIRST && size < 0) || size <= 0) return -1;
+
+	switch(mode) {
+		case QR_MODE_NUM:
+			return QRinput_checkModeNum(size, (const char *)data);
+		case QR_MODE_AN:
+			return QRinput_checkModeAn(size, (const char *)data);
+		case QR_MODE_KANJI:
+			return QRinput_checkModeKanji(size, data);
+		case QR_MODE_8:
+			return 0;
+		case QR_MODE_STRUCTURE:
+			return 0;
+		case QR_MODE_ECI:
+			return 0;
+		case QR_MODE_FNC1FIRST:
+			return 0;
+		case QR_MODE_FNC1SECOND:
+			return QRinput_checkModeFNC1Second(size);
+		case QR_MODE_NUL:
+			break;
+	}
+
+	return -1;
+}
+
+/******************************************************************************
+ * Estimation of the bit length
+ *****************************************************************************/
+
+/**
+ * Estimate the length of the encoded bit stream on the current version.
+ * @param entry
+ * @param version version of the symbol
+ * @param mqr
+ * @return number of bits
+ */
+static int QRinput_estimateBitStreamSizeOfEntry(QRinput_List *entry, int version, int mqr)
+{
+	int bits = 0;
+	int l, m;
+	int num;
+
+	if(version == 0) version = 1;
+
+	switch(entry->mode) {
+		case QR_MODE_NUM:
+			bits = QRinput_estimateBitsModeNum(entry->size);
+			break;
+		case QR_MODE_AN:
+			bits = QRinput_estimateBitsModeAn(entry->size);
+			break;
+		case QR_MODE_8:
+			bits = QRinput_estimateBitsMode8(entry->size);
+			break;
+		case QR_MODE_KANJI:
+			bits = QRinput_estimateBitsModeKanji(entry->size);
+			break;
+		case QR_MODE_STRUCTURE:
+			return STRUCTURE_HEADER_SIZE;
+		case QR_MODE_ECI:
+			bits = QRinput_estimateBitsModeECI(entry->data);
+			break;
+		case QR_MODE_FNC1FIRST:
+			return MODE_INDICATOR_SIZE;
+		case QR_MODE_FNC1SECOND:
+			return MODE_INDICATOR_SIZE + 8;
+		default:
+			return 0;
+	}
+
+	if(mqr) {
+		l = QRspec_lengthIndicator(entry->mode, version);
+		m = version - 1;
+		bits += l + m;
+	} else {
+		l = QRspec_lengthIndicator(entry->mode, version);
+		m = 1 << l;
+		num = (entry->size + m - 1) / m;
+
+		bits += num * (MODE_INDICATOR_SIZE + l);
+	}
+
+	return bits;
+}
+
+/**
+ * Estimate the length of the encoded bit stream of the data.
+ * @param input input data
+ * @param version version of the symbol
+ * @return number of bits
+ */
+STATIC_IN_RELEASE int QRinput_estimateBitStreamSize(QRinput *input, int version)
+{
+	QRinput_List *list;
+	int bits = 0;
+
+	list = input->head;
+	while(list != NULL) {
+		bits += QRinput_estimateBitStreamSizeOfEntry(list, version, input->mqr);
+		list = list->next;
+	}
+
+	return bits;
+}
+
+/**
+ * Estimate the required version number of the symbol.
+ * @param input input data
+ * @return required version number
+ */
+static int QRinput_estimateVersion(QRinput *input)
+{
+	int bits;
+	int version, prev;
+
+	version = 0;
+	do {
+		prev = version;
+		bits = QRinput_estimateBitStreamSize(input, prev);
+		version = QRspec_getMinimumVersion((bits + 7) / 8, input->level);
+	} while (version > prev);
+
+	return version;
+}
+
+/**
+ * Return required length in bytes for specified mode, version and bits.
+ * @param mode
+ * @param version
+ * @param bits
+ * @return required length of code words in bytes.
+ */
+STATIC_IN_RELEASE int QRinput_lengthOfCode(QRencodeMode mode, int version, int bits)
+{
+	int payload, size, chunks, remain, maxsize;
+
+	payload = bits - 4 - QRspec_lengthIndicator(mode, version);
+	switch(mode) {
+		case QR_MODE_NUM:
+			chunks = payload / 10;
+			remain = payload - chunks * 10;
+			size = chunks * 3;
+			if(remain >= 7) {
+				size += 2;
+			} else if(remain >= 4) {
+				size += 1;
+			}
+			break;
+		case QR_MODE_AN:
+			chunks = payload / 11;
+			remain = payload - chunks * 11;
+			size = chunks * 2;
+			if(remain >= 6) size++;
+			break;
+		case QR_MODE_8:
+			size = payload / 8;
+			break;
+		case QR_MODE_KANJI:
+			size = (payload / 13) * 2;
+			break;
+		case QR_MODE_STRUCTURE:
+			size = payload / 8;
+			break;
+		default:
+			size = 0;
+			break;
+	}
+	maxsize = QRspec_maximumWords(mode, version);
+	if(size < 0) size = 0;
+	if(maxsize > 0 && size > maxsize) size = maxsize;
+
+	return size;
+}
+
+/******************************************************************************
+ * Data conversion
+ *****************************************************************************/
+
+/**
+ * Convert the input data in the data chunk and append to a bit stream.
+ * @param entry
+ * @param bstream
+ * @return number of bits (>0) or -1 for failure.
+ */
+static int QRinput_encodeBitStream(QRinput_List *entry, BitStream *bstream, int version, int mqr)
+{
+	int words, ret;
+	QRinput_List *st1 = NULL, *st2 = NULL;
+	int prevsize;
+
+	prevsize = (int)BitStream_size(bstream);
+
+	words = QRspec_maximumWords(entry->mode, version);
+	if(words != 0 && entry->size > words) {
+		st1 = QRinput_List_newEntry(entry->mode, words, entry->data);
+		if(st1 == NULL) goto ABORT;
+		st2 = QRinput_List_newEntry(entry->mode, entry->size - words, &entry->data[words]);
+		if(st2 == NULL) goto ABORT;
+
+		ret = QRinput_encodeBitStream(st1, bstream, version, mqr);
+		if(ret < 0) goto ABORT;
+		ret = QRinput_encodeBitStream(st2, bstream, version, mqr);
+		if(ret < 0) goto ABORT;
+
+		QRinput_List_freeEntry(st1);
+		QRinput_List_freeEntry(st2);
+	} else {
+		ret = 0;
+		switch(entry->mode) {
+			case QR_MODE_NUM:
+				ret = QRinput_encodeModeNum(entry, bstream, version, mqr);
+				break;
+			case QR_MODE_AN:
+				ret = QRinput_encodeModeAn(entry, bstream, version, mqr);
+				break;
+			case QR_MODE_8:
+				ret = QRinput_encodeMode8(entry, bstream, version, mqr);
+				break;
+			case QR_MODE_KANJI:
+				ret = QRinput_encodeModeKanji(entry, bstream, version, mqr);
+				break;
+			case QR_MODE_STRUCTURE:
+				ret = QRinput_encodeModeStructure(entry, bstream, mqr);
+				break;
+			case QR_MODE_ECI:
+				ret = QRinput_encodeModeECI(entry, bstream);
+				break;
+			case QR_MODE_FNC1SECOND:
+				ret = QRinput_encodeModeFNC1Second(entry, bstream);
+				break;
+			default:
+				break;
+		}
+		if(ret < 0) return -1;
+	}
+
+	return (int)BitStream_size(bstream) - prevsize;
+ABORT:
+	QRinput_List_freeEntry(st1);
+	QRinput_List_freeEntry(st2);
+	return -1;
+}
+
+/**
+ * Convert the input data to a bit stream.
+ * @param input input data.
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ */
+static int QRinput_createBitStream(QRinput *input, BitStream *bstream)
+{
+	QRinput_List *list;
+	int bits, total = 0;
+
+	list = input->head;
+	while(list != NULL) {
+		bits = QRinput_encodeBitStream(list, bstream, input->version, input->mqr);
+		if(bits < 0) return -1;
+		total += bits;
+		list = list->next;
+	}
+
+	return total;
+}
+
+/**
+ * Convert the input data to a bit stream.
+ * When the version number is given and that is not sufficient, it is increased
+ * automatically.
+ * @param input input data.
+ * @param bstream where the converted data is stored.
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ENOMEM unable to allocate memory.
+ * @throw ERANGE input data is too large.
+ */
+static int QRinput_convertData(QRinput *input, BitStream *bstream)
+{
+	int bits;
+	int ver;
+
+	ver = QRinput_estimateVersion(input);
+	if(ver > QRinput_getVersion(input)) {
+		QRinput_setVersion(input, ver);
+	}
+
+	for(;;) {
+		BitStream_reset(bstream);
+		bits = QRinput_createBitStream(input, bstream);
+		if(bits < 0) return -1;
+		ver = QRspec_getMinimumVersion((bits + 7) / 8, input->level);
+		if(ver > QRinput_getVersion(input)) {
+			QRinput_setVersion(input, ver);
+		} else {
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * Append padding bits for the input data.
+ * @param bstream Bitstream to be appended.
+ * @param input input data.
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ERANGE input data is too large.
+ * @throw ENOMEM unable to allocate memory.
+ */
+static int QRinput_appendPaddingBit(BitStream *bstream, QRinput *input)
+{
+	int bits, maxbits, words, maxwords, i, ret;
+	int padlen;
+
+	bits = (int)BitStream_size(bstream);
+	maxwords = QRspec_getDataLength(input->version, input->level);
+	maxbits = maxwords * 8;
+
+	if(maxbits < bits) {
+		errno = ERANGE;
+		return -1;
+	}
+	if(maxbits == bits) {
+		return 0;
+	}
+
+	if(maxbits - bits <= 4) {
+		return (int)BitStream_appendNum(bstream, (size_t)(maxbits - bits), 0);
+	}
+
+	words = (bits + 4 + 7) / 8;
+
+	ret = (int)BitStream_appendNum(bstream, (size_t)(words * 8 - bits), 0);
+	if(ret < 0) return ret;
+
+	padlen = maxwords - words;
+	if(padlen > 0) {
+		for(i = 0; i < padlen; i++) {
+			ret = (int)BitStream_appendNum(bstream, 8, (i&1)?0x11:0xec);
+			if(ret < 0) {
+				return ret;
+			}
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * Append padding bits for the input data - Micro QR Code version.
+ * @param bstream Bitstream to be appended.
+ * @param input input data.
+ * @retval 0 success
+ * @retval -1 an error occurred and errno is set to indeicate the error.
+ *            See Execptions for the details.
+ * @throw ERANGE input data is too large.
+ * @throw ENOMEM unable to allocate memory.
+ */
+static int QRinput_appendPaddingBitMQR(BitStream *bstream, QRinput *input)
+{
+	int bits, maxbits, words, maxwords, i, ret, termbits;
+	int padlen;
+
+	bits = (int)BitStream_size(bstream);
+	maxbits = MQRspec_getDataLengthBit(input->version, input->level);
+	maxwords = maxbits / 8;
+
+	if(maxbits < bits) {
+		errno = ERANGE;
+		return -1;
+	}
+	if(maxbits == bits) {
+		return 0;
+	}
+
+	termbits = input->version * 2 + 1;
+
+	if(maxbits - bits <= termbits) {
+		return (int)BitStream_appendNum(bstream, (size_t)(maxbits - bits), 0);
+	}
+
+	bits += termbits;
+
+	words = (bits + 7) / 8;
+	if(maxbits - words * 8 > 0) {
+		termbits += words * 8 - bits;
+		if(words == maxwords) termbits += maxbits - words * 8;
+	} else {
+		termbits += words * 8 - bits;
+	}
+	ret = (int)BitStream_appendNum(bstream, (size_t)termbits, 0);
+	if(ret < 0) return ret;
+
+	padlen = maxwords - words;
+	if(padlen > 0) {
+		for(i = 0; i < padlen; i++) {
+			ret = (int)BitStream_appendNum(bstream, 8, (i&1)?0x11:0xec);
+			if(ret < 0) return ret;
+		}
+		termbits = maxbits - maxwords * 8;
+		if(termbits > 0) {
+			ret = (int)BitStream_appendNum(bstream, (size_t)termbits, 0);
+			if(ret < 0) return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int QRinput_insertFNC1Header(QRinput *input)
+{
+	QRinput_List *entry = NULL;
+
+	if(input->fnc1 == 1) {
+		entry = QRinput_List_newEntry(QR_MODE_FNC1FIRST, 0, NULL);
+	} else if(input->fnc1 == 2) {
+		entry = QRinput_List_newEntry(QR_MODE_FNC1SECOND, 1, &(input->appid));
+	}
+	if(entry == NULL) {
+		return -1;
+	}
+
+	if(input->head->mode != QR_MODE_STRUCTURE && input->head->mode != QR_MODE_ECI) {
+		entry->next = input->head;
+		input->head = entry;
+	} else {
+		entry->next = input->head->next;
+		input->head->next = entry;
+	}
+
+	return 0;
+}
+
+/**
+ * Merge all bit streams in the input data.
+ * @param input input data.
+ * @return merged bit stream
+ */
+
+STATIC_IN_RELEASE int QRinput_mergeBitStream(QRinput *input, BitStream *bstream)
+{
+	if(input->mqr) {
+		if(QRinput_createBitStream(input, bstream) < 0) {
+			return -1;
+		}
+	} else {
+		if(input->fnc1) {
+			if(QRinput_insertFNC1Header(input) < 0) {
+				return -1;
+			}
+		}
+		if(QRinput_convertData(input, bstream) < 0) {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * Merge all bit streams in the input data and append padding bits
+ * @param input input data.
+ * @return padded merged bit stream
+ */
+
+STATIC_IN_RELEASE int QRinput_getBitStream(QRinput *input, BitStream *bstream)
+{
+	int ret;
+
+	ret = QRinput_mergeBitStream(input, bstream);
+	if(ret < 0) return -1;
+
+	if(input->mqr) {
+		ret = QRinput_appendPaddingBitMQR(bstream, input);
+	} else {
+		ret = QRinput_appendPaddingBit(bstream, input);
+	}
+	if(ret < 0) return -1;
+
+	return 0;
+}
+
+/**
+ * Pack all bit streams padding bits into a byte array.
+ * @param input input data.
+ * @return padded merged byte stream
+ */
+
+unsigned char *QRinput_getByteStream(QRinput *input)
+{
+	BitStream *bstream;
+	unsigned char *array;
+	int ret;
+
+	bstream = BitStream_new();
+	if(bstream == NULL) {
+		return NULL;
+	}
+
+	ret = QRinput_getBitStream(input, bstream);
+	if(ret < 0) {
+		BitStream_free(bstream);
+		return NULL;
+	}
+	array = BitStream_toByte(bstream);
+	BitStream_free(bstream);
+
+	return array;
+}
+
+/******************************************************************************
+ * Structured input data
+ *****************************************************************************/
+
+static QRinput_InputList *QRinput_InputList_newEntry(QRinput *input)
+{
+	QRinput_InputList *entry;
+
+	entry = (QRinput_InputList *)malloc(sizeof(QRinput_InputList));
+	if(entry == NULL) return NULL;
+
+	entry->input = input;
+	entry->next = NULL;
+
+	return entry;
+}
+
+static void QRinput_InputList_freeEntry(QRinput_InputList *entry)
+{
+	if(entry != NULL) {
+		QRinput_free(entry->input);
+		free(entry);
+	}
+}
+
+QRinput_Struct *QRinput_Struct_new(void)
+{
+	QRinput_Struct *s;
+
+	s = (QRinput_Struct *)malloc(sizeof(QRinput_Struct));
+	if(s == NULL) return NULL;
+
+	s->size = 0;
+	s->parity = -1;
+	s->head = NULL;
+	s->tail = NULL;
+
+	return s;
+}
+
+void QRinput_Struct_setParity(QRinput_Struct *s, unsigned char parity)
+{
+	s->parity = (int)parity;
+}
+
+int QRinput_Struct_appendInput(QRinput_Struct *s, QRinput *input)
+{
+	QRinput_InputList *e;
+
+	if(input->mqr) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	e = QRinput_InputList_newEntry(input);
+	if(e == NULL) return -1;
+
+	s->size++;
+	if(s->tail == NULL) {
+		s->head = e;
+		s->tail = e;
+	} else {
+		s->tail->next = e;
+		s->tail = e;
+	}
+
+	return s->size;
+}
+
+void QRinput_Struct_free(QRinput_Struct *s)
+{
+	QRinput_InputList *list, *next;
+
+	if(s != NULL) {
+		list = s->head;
+		while(list != NULL) {
+			next = list->next;
+			QRinput_InputList_freeEntry(list);
+			list = next;
+		}
+		free(s);
+	}
+}
+
+static unsigned char QRinput_Struct_calcParity(QRinput_Struct *s)
+{
+	QRinput_InputList *list;
+	unsigned char parity = 0;
+
+	list = s->head;
+	while(list != NULL) {
+		parity ^= QRinput_calcParity(list->input);
+		list = list->next;
+	}
+
+	QRinput_Struct_setParity(s, parity);
+
+	return parity;
+}
+
+static int QRinput_List_shrinkEntry(QRinput_List *entry, int bytes)
+{
+	unsigned char *data;
+
+	data = (unsigned char *)malloc((size_t)bytes);
+	if(data == NULL) return -1;
+
+	memcpy(data, entry->data, (size_t)bytes);
+	free(entry->data);
+	entry->data = data;
+	entry->size = bytes;
+
+	return 0;
+}
+
+STATIC_IN_RELEASE int QRinput_splitEntry(QRinput_List *entry, int bytes)
+{
+	QRinput_List *e;
+	int ret;
+
+	e = QRinput_List_newEntry(entry->mode, entry->size - bytes, entry->data + bytes);
+	if(e == NULL) {
+		return -1;
+	}
+
+	ret = QRinput_List_shrinkEntry(entry, bytes);
+	if(ret < 0) {
+		QRinput_List_freeEntry(e);
+		return -1;
+	}
+
+	e->next = entry->next;
+	entry->next = e;
+
+	return 0;
+}
+
+QRinput_Struct *QRinput_splitQRinputToStruct(QRinput *input)
+{
+	QRinput *p = NULL;
+	QRinput_Struct *s = NULL;
+	int bits, maxbits, nextbits, bytes, ret;
+	QRinput_List *list, *next, *prev;
+	BitStream *bstream = NULL;
+
+	if(input->mqr) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	s = QRinput_Struct_new();
+	if(s == NULL) return NULL;
+
+	input = QRinput_dup(input);
+	if(input == NULL) {
+		QRinput_Struct_free(s);
+		return NULL;
+	}
+
+	QRinput_Struct_setParity(s, QRinput_calcParity(input));
+	maxbits = QRspec_getDataLength(input->version, input->level) * 8 - STRUCTURE_HEADER_SIZE;
+
+	if(maxbits <= 0) goto ABORT;
+
+	bstream = BitStream_new();
+	if(bstream == NULL) goto ABORT;
+
+	bits = 0;
+	list = input->head;
+	prev = NULL;
+	while(list != NULL) {
+		nextbits = QRinput_estimateBitStreamSizeOfEntry(list, input->version, input->mqr);
+		if(bits + nextbits <= maxbits) {
+			BitStream_reset(bstream);
+			ret = QRinput_encodeBitStream(list, bstream, input->version, input->mqr);
+			if(ret < 0) goto ABORT;
+			bits += ret;
+			prev = list;
+			list = list->next;
+		} else {
+			bytes = QRinput_lengthOfCode(list->mode, input->version, maxbits - bits);
+			p = QRinput_new2(input->version, input->level);
+			if(p == NULL) goto ABORT;
+			if(bytes > 0) {
+				/* Splits this entry into 2 entries. */
+				ret = QRinput_splitEntry(list, bytes);
+				if(ret < 0) {
+					QRinput_free(p);
+					goto ABORT;
+				}
+				/* First half is the tail of the current input. */
+				next = list->next;
+				list->next = NULL;
+				/* Second half is the head of the next input, p.*/
+				p->head = next;
+				/* Renew QRinput.tail. */
+				p->tail = input->tail;
+				input->tail = list;
+				/* Point to the next entry. */
+				prev = list;
+				list = next;
+			} else {
+				/* Current entry will go to the next input. */
+				prev->next = NULL;
+				p->head = list;
+				p->tail = input->tail;
+				input->tail = prev;
+			}
+			ret = QRinput_Struct_appendInput(s, input);
+			if(ret < 0) {
+				QRinput_free(p);
+				goto ABORT;
+			}
+			input = p;
+			bits = 0;
+		}
+	}
+	ret = QRinput_Struct_appendInput(s, input);
+	if(ret < 0) goto ABORT;
+	if(s->size > MAX_STRUCTURED_SYMBOLS) {
+		errno = ERANGE;
+		QRinput_Struct_free(s);
+		BitStream_free(bstream);
+		return NULL;
+	}
+	ret = QRinput_Struct_insertStructuredAppendHeaders(s);
+	if(ret < 0) {
+		QRinput_Struct_free(s);
+		BitStream_free(bstream);
+		return NULL;
+	}
+
+	BitStream_free(bstream);
+	return s;
+
+ABORT:
+	BitStream_free(bstream);
+	QRinput_free(input);
+	QRinput_Struct_free(s);
+	return NULL;
+}
+
+int QRinput_Struct_insertStructuredAppendHeaders(QRinput_Struct *s)
+{
+	int i;
+	QRinput_InputList *list;
+
+	if(s->size == 1) {
+		return 0;
+	}
+
+	if(s->parity < 0) {
+		QRinput_Struct_calcParity(s);
+	}
+	i = 1;
+	list = s->head;
+	while(list != NULL) {
+		if(QRinput_insertStructuredAppendHeader(list->input, s->size, i, s->parity))
+			return -1;
+		i++;
+		list = list->next;
+	}
+
+	return 0;
+}
+
+/******************************************************************************
+ * Extended encoding mode (FNC1 and ECI)
+ *****************************************************************************/
+
+int QRinput_setFNC1First(QRinput *input)
+{
+	if(input->mqr) {
+		errno = EINVAL;
+		return -1;
+	}
+	input->fnc1 = 1;
+
+	return 0;
+}
+
+int QRinput_setFNC1Second(QRinput *input, unsigned char appid)
+{
+	if(input->mqr) {
+		errno = EINVAL;
+		return -1;
+	}
+	input->fnc1 = 2;
+	input->appid = appid;
+
+	return 0;
+}
diff --git a/libs/libqrencode/src/qrinput.h b/libs/libqrencode/src/qrinput.h
new file mode 100644
index 0000000000..b504d0d910
--- /dev/null
+++ b/libs/libqrencode/src/qrinput.h
@@ -0,0 +1,123 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Input data chunk class
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef QRINPUT_H
+#define QRINPUT_H
+
+#include "qrencode.h"
+#include "bitstream.h"
+
+int QRinput_isSplittableMode(QRencodeMode mode);
+
+/******************************************************************************
+ * Entry of input data
+ *****************************************************************************/
+typedef struct _QRinput_List QRinput_List;
+
+struct _QRinput_List {
+	QRencodeMode mode;
+	int size;            ///< Size of data chunk (byte).
+	unsigned char *data; ///< Data chunk.
+	BitStream *bstream;
+	QRinput_List *next;
+};
+
+/******************************************************************************
+ * Input Data
+ *****************************************************************************/
+struct _QRinput {
+	int version;
+	QRecLevel level;
+	QRinput_List *head;
+	QRinput_List *tail;
+	int mqr;
+	int fnc1;
+	unsigned char appid;
+};
+
+/******************************************************************************
+ * Structured append input data
+ *****************************************************************************/
+typedef struct _QRinput_InputList QRinput_InputList;
+
+struct _QRinput_InputList {
+	QRinput *input;
+	QRinput_InputList *next;
+};
+
+struct _QRinput_Struct {
+	int size; ///< number of structured symbols
+	int parity;
+	QRinput_InputList *head;
+	QRinput_InputList *tail;
+};
+
+/**
+ * Pack all bit streams padding bits into a byte array.
+ * @param input input data.
+ * @return padded merged byte stream
+ */
+extern unsigned char *QRinput_getByteStream(QRinput *input);
+
+
+extern int QRinput_estimateBitsModeNum(int size);
+extern int QRinput_estimateBitsModeAn(int size);
+extern int QRinput_estimateBitsMode8(int size);
+extern int QRinput_estimateBitsModeKanji(int size);
+
+extern QRinput *QRinput_dup(QRinput *input);
+
+extern const signed char QRinput_anTable[128];
+
+/**
+ * Look up the alphabet-numeric convesion table (see JIS X0510:2004, pp.19).
+ * @param __c__ character
+ * @return value
+ */
+#define QRinput_lookAnTable(__c__) \
+	((__c__ & 0x80)?-1:QRinput_anTable[(int)__c__])
+
+/**
+ * Length of a standard mode indicator in bits.
+ */
+
+#define MODE_INDICATOR_SIZE 4
+
+/**
+ * Length of a segment of structured-append header.
+ */
+#define STRUCTURE_HEADER_SIZE 20
+
+/**
+ * Maximum number of symbols in a set of structured-appended symbols.
+ */
+#define MAX_STRUCTURED_SYMBOLS 16
+
+#ifdef WITH_TESTS
+extern int QRinput_mergeBitStream(QRinput *input, BitStream *bstream);
+extern int QRinput_getBitStream(QRinput *input, BitStream *bstream);
+extern int QRinput_estimateBitStreamSize(QRinput *input, int version);
+extern int QRinput_splitEntry(QRinput_List *entry, int bytes);
+extern int QRinput_lengthOfCode(QRencodeMode mode, int version, int bits);
+extern int QRinput_insertStructuredAppendHeader(QRinput *input, int size, int index, unsigned char parity);
+#endif
+
+#endif /* QRINPUT_H */
diff --git a/libs/libqrencode/src/qrspec.c b/libs/libqrencode/src/qrspec.c
new file mode 100644
index 0000000000..f3d3b2c526
--- /dev/null
+++ b/libs/libqrencode/src/qrspec.c
@@ -0,0 +1,514 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * QR Code specification in convenient format.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ *  or
+ * "Automatic identification and data capture techniques --
+ *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "qrspec.h"
+#include "qrinput.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+typedef struct {
+	int width; //< Edge length of the symbol
+	int words;  //< Data capacity (bytes)
+	int remainder; //< Remainder bit (bits)
+	int ec[4];  //< Number of ECC code (bytes)
+} QRspec_Capacity;
+
+/**
+ * Table of the capacity of symbols
+ * See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
+ */
+static const QRspec_Capacity qrspecCapacity[QRSPEC_VERSION_MAX + 1] = {
+	{  0,    0, 0, {   0,    0,    0,    0}},
+	{ 21,   26, 0, {   7,   10,   13,   17}}, // 1
+	{ 25,   44, 7, {  10,   16,   22,   28}},
+	{ 29,   70, 7, {  15,   26,   36,   44}},
+	{ 33,  100, 7, {  20,   36,   52,   64}},
+	{ 37,  134, 7, {  26,   48,   72,   88}}, // 5
+	{ 41,  172, 7, {  36,   64,   96,  112}},
+	{ 45,  196, 0, {  40,   72,  108,  130}},
+	{ 49,  242, 0, {  48,   88,  132,  156}},
+	{ 53,  292, 0, {  60,  110,  160,  192}},
+	{ 57,  346, 0, {  72,  130,  192,  224}}, //10
+	{ 61,  404, 0, {  80,  150,  224,  264}},
+	{ 65,  466, 0, {  96,  176,  260,  308}},
+	{ 69,  532, 0, { 104,  198,  288,  352}},
+	{ 73,  581, 3, { 120,  216,  320,  384}},
+	{ 77,  655, 3, { 132,  240,  360,  432}}, //15
+	{ 81,  733, 3, { 144,  280,  408,  480}},
+	{ 85,  815, 3, { 168,  308,  448,  532}},
+	{ 89,  901, 3, { 180,  338,  504,  588}},
+	{ 93,  991, 3, { 196,  364,  546,  650}},
+	{ 97, 1085, 3, { 224,  416,  600,  700}}, //20
+	{101, 1156, 4, { 224,  442,  644,  750}},
+	{105, 1258, 4, { 252,  476,  690,  816}},
+	{109, 1364, 4, { 270,  504,  750,  900}},
+	{113, 1474, 4, { 300,  560,  810,  960}},
+	{117, 1588, 4, { 312,  588,  870, 1050}}, //25
+	{121, 1706, 4, { 336,  644,  952, 1110}},
+	{125, 1828, 4, { 360,  700, 1020, 1200}},
+	{129, 1921, 3, { 390,  728, 1050, 1260}},
+	{133, 2051, 3, { 420,  784, 1140, 1350}},
+	{137, 2185, 3, { 450,  812, 1200, 1440}}, //30
+	{141, 2323, 3, { 480,  868, 1290, 1530}},
+	{145, 2465, 3, { 510,  924, 1350, 1620}},
+	{149, 2611, 3, { 540,  980, 1440, 1710}},
+	{153, 2761, 3, { 570, 1036, 1530, 1800}},
+	{157, 2876, 0, { 570, 1064, 1590, 1890}}, //35
+	{161, 3034, 0, { 600, 1120, 1680, 1980}},
+	{165, 3196, 0, { 630, 1204, 1770, 2100}},
+	{169, 3362, 0, { 660, 1260, 1860, 2220}},
+	{173, 3532, 0, { 720, 1316, 1950, 2310}},
+	{177, 3706, 0, { 750, 1372, 2040, 2430}} //40
+};
+
+int QRspec_getDataLength(int version, QRecLevel level)
+{
+	return qrspecCapacity[version].words - qrspecCapacity[version].ec[level];
+}
+
+int QRspec_getECCLength(int version, QRecLevel level)
+{
+	return qrspecCapacity[version].ec[level];
+}
+
+int QRspec_getMinimumVersion(int size, QRecLevel level)
+{
+	int i;
+	int words;
+
+	for(i = 1; i <= QRSPEC_VERSION_MAX; i++) {
+		words  = qrspecCapacity[i].words - qrspecCapacity[i].ec[level];
+		if(words >= size) return i;
+	}
+
+	return QRSPEC_VERSION_MAX;
+}
+
+int QRspec_getWidth(int version)
+{
+	return qrspecCapacity[version].width;
+}
+
+int QRspec_getRemainder(int version)
+{
+	return qrspecCapacity[version].remainder;
+}
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+static const int lengthTableBits[4][3] = {
+	{10, 12, 14},
+	{ 9, 11, 13},
+	{ 8, 16, 16},
+	{ 8, 10, 12}
+};
+
+int QRspec_lengthIndicator(QRencodeMode mode, int version)
+{
+	int l;
+
+	if(!QRinput_isSplittableMode(mode)) return 0;
+	if(version <= 9) {
+		l = 0;
+	} else if(version <= 26) {
+		l = 1;
+	} else {
+		l = 2;
+	}
+
+	return lengthTableBits[mode][l];
+}
+
+int QRspec_maximumWords(QRencodeMode mode, int version)
+{
+	int l;
+	int bits;
+	int words;
+
+	if(!QRinput_isSplittableMode(mode)) return 0;
+	if(version <= 9) {
+		l = 0;
+	} else if(version <= 26) {
+		l = 1;
+	} else {
+		l = 2;
+	}
+
+	bits = lengthTableBits[mode][l];
+	words = (1 << bits) - 1;
+	if(mode == QR_MODE_KANJI) {
+		words *= 2; // the number of bytes is required
+	}
+
+	return words;
+}
+
+/******************************************************************************
+ * Error correction code
+ *****************************************************************************/
+
+/**
+ * Table of the error correction code (Reed-Solomon block)
+ * See Table 12-16 (pp.30-36), JIS X0510:2004.
+ */
+static const int eccTable[QRSPEC_VERSION_MAX+1][4][2] = {
+	{{ 0,  0}, { 0,  0}, { 0,  0}, { 0,  0}},
+	{{ 1,  0}, { 1,  0}, { 1,  0}, { 1,  0}}, // 1
+	{{ 1,  0}, { 1,  0}, { 1,  0}, { 1,  0}},
+	{{ 1,  0}, { 1,  0}, { 2,  0}, { 2,  0}},
+	{{ 1,  0}, { 2,  0}, { 2,  0}, { 4,  0}},
+	{{ 1,  0}, { 2,  0}, { 2,  2}, { 2,  2}}, // 5
+	{{ 2,  0}, { 4,  0}, { 4,  0}, { 4,  0}},
+	{{ 2,  0}, { 4,  0}, { 2,  4}, { 4,  1}},
+	{{ 2,  0}, { 2,  2}, { 4,  2}, { 4,  2}},
+	{{ 2,  0}, { 3,  2}, { 4,  4}, { 4,  4}},
+	{{ 2,  2}, { 4,  1}, { 6,  2}, { 6,  2}}, //10
+	{{ 4,  0}, { 1,  4}, { 4,  4}, { 3,  8}},
+	{{ 2,  2}, { 6,  2}, { 4,  6}, { 7,  4}},
+	{{ 4,  0}, { 8,  1}, { 8,  4}, {12,  4}},
+	{{ 3,  1}, { 4,  5}, {11,  5}, {11,  5}},
+	{{ 5,  1}, { 5,  5}, { 5,  7}, {11,  7}}, //15
+	{{ 5,  1}, { 7,  3}, {15,  2}, { 3, 13}},
+	{{ 1,  5}, {10,  1}, { 1, 15}, { 2, 17}},
+	{{ 5,  1}, { 9,  4}, {17,  1}, { 2, 19}},
+	{{ 3,  4}, { 3, 11}, {17,  4}, { 9, 16}},
+	{{ 3,  5}, { 3, 13}, {15,  5}, {15, 10}}, //20
+	{{ 4,  4}, {17,  0}, {17,  6}, {19,  6}},
+	{{ 2,  7}, {17,  0}, { 7, 16}, {34,  0}},
+	{{ 4,  5}, { 4, 14}, {11, 14}, {16, 14}},
+	{{ 6,  4}, { 6, 14}, {11, 16}, {30,  2}},
+	{{ 8,  4}, { 8, 13}, { 7, 22}, {22, 13}}, //25
+	{{10,  2}, {19,  4}, {28,  6}, {33,  4}},
+	{{ 8,  4}, {22,  3}, { 8, 26}, {12, 28}},
+	{{ 3, 10}, { 3, 23}, { 4, 31}, {11, 31}},
+	{{ 7,  7}, {21,  7}, { 1, 37}, {19, 26}},
+	{{ 5, 10}, {19, 10}, {15, 25}, {23, 25}}, //30
+	{{13,  3}, { 2, 29}, {42,  1}, {23, 28}},
+	{{17,  0}, {10, 23}, {10, 35}, {19, 35}},
+	{{17,  1}, {14, 21}, {29, 19}, {11, 46}},
+	{{13,  6}, {14, 23}, {44,  7}, {59,  1}},
+	{{12,  7}, {12, 26}, {39, 14}, {22, 41}}, //35
+	{{ 6, 14}, { 6, 34}, {46, 10}, { 2, 64}},
+	{{17,  4}, {29, 14}, {49, 10}, {24, 46}},
+	{{ 4, 18}, {13, 32}, {48, 14}, {42, 32}},
+	{{20,  4}, {40,  7}, {43, 22}, {10, 67}},
+	{{19,  6}, {18, 31}, {34, 34}, {20, 61}},//40
+};
+
+void QRspec_getEccSpec(int version, QRecLevel level, int spec[5])
+{
+	int b1, b2;
+	int data, ecc;
+
+	b1 = eccTable[version][level][0];
+	b2 = eccTable[version][level][1];
+	data = QRspec_getDataLength(version, level);
+	ecc  = QRspec_getECCLength(version, level);
+
+	if(b2 == 0) {
+		spec[0] = b1;
+		spec[1] = data / b1;
+		spec[2] = ecc / b1;
+		spec[3] = spec[4] = 0;
+	} else {
+		spec[0] = b1;
+		spec[1] = data / (b1 + b2);
+		spec[2] = ecc  / (b1 + b2);
+		spec[3] = b2;
+		spec[4] = spec[1] + 1;
+	}
+}
+
+/******************************************************************************
+ * Alignment pattern
+ *****************************************************************************/
+
+/**
+ * Positions of alignment patterns.
+ * This array includes only the second and the third position of the alignment
+ * patterns. Rest of them can be calculated from the distance between them.
+ *
+ * See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
+ */
+static const int alignmentPattern[QRSPEC_VERSION_MAX+1][2] = {
+	{ 0,  0},
+	{ 0,  0}, {18,  0}, {22,  0}, {26,  0}, {30,  0}, // 1- 5
+	{34,  0}, {22, 38}, {24, 42}, {26, 46}, {28, 50}, // 6-10
+	{30, 54}, {32, 58}, {34, 62}, {26, 46}, {26, 48}, //11-15
+	{26, 50}, {30, 54}, {30, 56}, {30, 58}, {34, 62}, //16-20
+	{28, 50}, {26, 50}, {30, 54}, {28, 54}, {32, 58}, //21-25
+	{30, 58}, {34, 62}, {26, 50}, {30, 54}, {26, 52}, //26-30
+	{30, 56}, {34, 60}, {30, 58}, {34, 62}, {30, 54}, //31-35
+	{24, 50}, {28, 54}, {32, 58}, {26, 54}, {30, 58}, //35-40
+};
+
+/**
+ * Put an alignment marker.
+ * @param frame
+ * @param width
+ * @param ox,oy center coordinate of the pattern
+ */
+static void QRspec_putAlignmentMarker(unsigned char *frame, int width, int ox, int oy)
+{
+	static const unsigned char finder[] = {
+		0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+		0xa1, 0xa0, 0xa0, 0xa0, 0xa1,
+		0xa1, 0xa0, 0xa1, 0xa0, 0xa1,
+		0xa1, 0xa0, 0xa0, 0xa0, 0xa1,
+		0xa1, 0xa1, 0xa1, 0xa1, 0xa1,
+	};
+	int x, y;
+	const unsigned char *s;
+
+	frame += (oy - 2) * width + ox - 2;
+	s = finder;
+	for(y = 0; y < 5; y++) {
+		for(x = 0; x < 5; x++) {
+			frame[x] = s[x];
+		}
+		frame += width;
+		s += 5;
+	}
+}
+
+static void QRspec_putAlignmentPattern(int version, unsigned char *frame, int width)
+{
+	int d, w, x, y, cx, cy;
+
+	if(version < 2) return;
+
+	d = alignmentPattern[version][1] - alignmentPattern[version][0];
+	if(d < 0) {
+		w = 2;
+	} else {
+		w = (width - alignmentPattern[version][0]) / d + 2;
+	}
+
+	if(w * w - 3 == 1) {
+		x = alignmentPattern[version][0];
+		y = alignmentPattern[version][0];
+		QRspec_putAlignmentMarker(frame, width, x, y);
+		return;
+	}
+
+	cx = alignmentPattern[version][0];
+	for(x = 1; x < w - 1; x++) {
+		QRspec_putAlignmentMarker(frame, width,  6, cx);
+		QRspec_putAlignmentMarker(frame, width, cx,  6);
+		cx += d;
+	}
+
+	cy = alignmentPattern[version][0];
+	for(y = 0; y < w-1; y++) {
+		cx = alignmentPattern[version][0];
+		for(x = 0; x < w-1; x++) {
+			QRspec_putAlignmentMarker(frame, width, cx, cy);
+			cx += d;
+		}
+		cy += d;
+	}
+}
+
+/******************************************************************************
+ * Version information pattern
+ *****************************************************************************/
+
+/**
+ * Version information pattern (BCH coded).
+ * See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
+ */
+static const unsigned int versionPattern[QRSPEC_VERSION_MAX - 6] = {
+	0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
+	0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
+	0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
+	0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
+	0x27541, 0x28c69
+};
+
+unsigned int QRspec_getVersionPattern(int version)
+{
+	if(version < 7 || version > QRSPEC_VERSION_MAX) return 0;
+
+	return versionPattern[version - 7];
+}
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/* See calcFormatInfo in tests/test_qrspec.c */
+static const unsigned int formatInfo[4][8] = {
+	{0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976},
+	{0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0},
+	{0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed},
+	{0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b}
+};
+
+unsigned int QRspec_getFormatInfo(int mask, QRecLevel level)
+{
+	if(mask < 0 || mask > 7) return 0;
+
+	return formatInfo[level][mask];
+}
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Put a finder pattern.
+ * @param frame
+ * @param width
+ * @param ox,oy upper-left coordinate of the pattern
+ */
+static void putFinderPattern(unsigned char *frame, int width, int ox, int oy)
+{
+	static const unsigned char finder[] = {
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+	};
+	int x, y;
+	const unsigned char *s;
+
+	frame += oy * width + ox;
+	s = finder;
+	for(y = 0; y < 7; y++) {
+		for(x = 0; x < 7; x++) {
+			frame[x] = s[x];
+		}
+		frame += width;
+		s += 7;
+	}
+}
+
+
+static unsigned char *QRspec_createFrame(int version)
+{
+	unsigned char *frame, *p, *q;
+	int width;
+	int x, y;
+	unsigned int verinfo, v;
+
+	width = qrspecCapacity[version].width;
+	frame = (unsigned char *)malloc((size_t)(width * width));
+	if(frame == NULL) return NULL;
+
+	memset(frame, 0, (size_t)(width * width));
+	/* Finder pattern */
+	putFinderPattern(frame, width, 0, 0);
+	putFinderPattern(frame, width, width - 7, 0);
+	putFinderPattern(frame, width, 0, width - 7);
+	/* Separator */
+	p = frame;
+	q = frame + width * (width - 7);
+	for(y = 0; y < 7; y++) {
+		p[7] = 0xc0;
+		p[width - 8] = 0xc0;
+		q[7] = 0xc0;
+		p += width;
+		q += width;
+	}
+	memset(frame + width * 7, 0xc0, 8);
+	memset(frame + width * 8 - 8, 0xc0, 8);
+	memset(frame + width * (width - 8), 0xc0, 8);
+	/* Mask format information area */
+	memset(frame + width * 8, 0x84, 9);
+	memset(frame + width * 9 - 8, 0x84, 8);
+	p = frame + 8;
+	for(y = 0; y < 8; y++) {
+		*p = 0x84;
+		p += width;
+	}
+	p = frame + width * (width - 7) + 8;
+	for(y = 0; y < 7; y++) {
+		*p = 0x84;
+		p += width;
+	}
+	/* Timing pattern */
+	p = frame + width * 6 + 8;
+	q = frame + width * 8 + 6;
+	for(x = 1; x < width-15; x++) {
+		*p =  0x90 | (x & 1);
+		*q =  0x90 | (x & 1);
+		p++;
+		q += width;
+	}
+	/* Alignment pattern */
+	QRspec_putAlignmentPattern(version, frame, width);
+
+	/* Version information */
+	if(version >= 7) {
+		verinfo = QRspec_getVersionPattern(version);
+
+		p = frame + width * (width - 11);
+		v = verinfo;
+		for(x = 0; x < 6; x++) {
+			for(y = 0; y < 3; y++) {
+				p[width * y + x] = 0x88 | (v & 1);
+				v = v >> 1;
+			}
+		}
+
+		p = frame + width - 11;
+		v = verinfo;
+		for(y = 0; y < 6; y++) {
+			for(x = 0; x < 3; x++) {
+				p[x] = 0x88 | (v & 1);
+				v = v >> 1;
+			}
+			p += width;
+		}
+	}
+	/* and a little bit... */
+	frame[width * (width - 8) + 8] = 0x81;
+
+	return frame;
+}
+
+unsigned char *QRspec_newFrame(int version)
+{
+	if(version < 1 || version > QRSPEC_VERSION_MAX) return NULL;
+
+	return QRspec_createFrame(version);
+}
diff --git a/libs/libqrencode/src/qrspec.h b/libs/libqrencode/src/qrspec.h
new file mode 100644
index 0000000000..4d01879ed3
--- /dev/null
+++ b/libs/libqrencode/src/qrspec.h
@@ -0,0 +1,174 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * QR Code specification in convenient format.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef QRSPEC_H
+#define QRSPEC_H
+
+#include "qrencode.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+/**
+ * Maximum width of a symbol
+ */
+#define QRSPEC_WIDTH_MAX 177
+
+/**
+ * Return maximum data code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return maximum size (bytes)
+ */
+extern int QRspec_getDataLength(int version, QRecLevel level);
+
+/**
+ * Return maximum error correction code length (bytes) for the version.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @return ECC size (bytes)
+ */
+extern int QRspec_getECCLength(int version, QRecLevel level);
+
+/**
+ * Return a version number that satisfies the input code length.
+ * @param size input code length (byte)
+ * @param level error correction level
+ * @return version number
+ */
+extern int QRspec_getMinimumVersion(int size, QRecLevel level);
+
+/**
+ * Return the width of the symbol for the version.
+ * @param version vesion of the symbol
+ * @return width of the symbol
+ */
+extern int QRspec_getWidth(int version);
+
+/**
+ * Return the numer of remainder bits.
+ * @param version vesion of the symbol
+ * @return number of remainder bits
+ */
+extern int QRspec_getRemainder(int version);
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+/**
+ * Return the size of length indicator for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the size of the appropriate length indicator (bits).
+ */
+extern int QRspec_lengthIndicator(QRencodeMode mode, int version);
+
+/**
+ * Return the maximum length for the mode and version.
+ * @param mode encode mode
+ * @param version vesion of the symbol
+ * @return the maximum length (bytes)
+ */
+extern int QRspec_maximumWords(QRencodeMode mode, int version);
+
+/******************************************************************************
+ * Error correction code
+ *****************************************************************************/
+
+/**
+ * Return an array of ECC specification.
+ * @param version version of the symbol
+ * @param level error correction level
+ * @param spec an array of ECC specification contains as following:
+ * {# of type1 blocks, # of data code, # of ecc code,
+ *  # of type2 blocks, # of data code}
+ */
+void QRspec_getEccSpec(int version, QRecLevel level, int spec[5]);
+
+#define QRspec_rsBlockNum(__spec__) (__spec__[0] + __spec__[3])
+#define QRspec_rsBlockNum1(__spec__) (__spec__[0])
+#define QRspec_rsDataCodes1(__spec__) (__spec__[1])
+#define QRspec_rsEccCodes1(__spec__) (__spec__[2])
+#define QRspec_rsBlockNum2(__spec__) (__spec__[3])
+#define QRspec_rsDataCodes2(__spec__) (__spec__[4])
+#define QRspec_rsEccCodes2(__spec__) (__spec__[2])
+
+#define QRspec_rsDataLength(__spec__) \
+	((QRspec_rsBlockNum1(__spec__) * QRspec_rsDataCodes1(__spec__)) + \
+	 (QRspec_rsBlockNum2(__spec__) * QRspec_rsDataCodes2(__spec__)))
+#define QRspec_rsEccLength(__spec__) \
+	(QRspec_rsBlockNum(__spec__) * QRspec_rsEccCodes1(__spec__))
+
+/******************************************************************************
+ * Version information pattern
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded version information pattern that is used for the symbol
+ * of version 7 or greater. Use lower 18 bits.
+ * @param version version of the symbol
+ * @return BCH encoded version information pattern
+ */
+extern unsigned int QRspec_getVersionPattern(int version);
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/**
+ * Return BCH encoded format information pattern.
+ * @param mask mask number
+ * @param level error correction level
+ * @return BCH encoded format information pattern
+ */
+extern unsigned int QRspec_getFormatInfo(int mask, QRecLevel level);
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Return a copy of initialized frame.
+ * @param version version of the symbol
+ * @return Array of unsigned char. You can free it by free().
+ */
+extern unsigned char *QRspec_newFrame(int version);
+
+/******************************************************************************
+ * Mode indicator
+ *****************************************************************************/
+
+/**
+ * Mode indicator. See Table 2 of JIS X0510:2004, pp.16.
+ */
+#define QRSPEC_MODEID_ECI        7
+#define QRSPEC_MODEID_NUM        1
+#define QRSPEC_MODEID_AN         2
+#define QRSPEC_MODEID_8          4
+#define QRSPEC_MODEID_KANJI      8
+#define QRSPEC_MODEID_FNC1FIRST  5
+#define QRSPEC_MODEID_FNC1SECOND 9
+#define QRSPEC_MODEID_STRUCTURE  3
+#define QRSPEC_MODEID_TERMINATOR 0
+
+#endif /* QRSPEC_H */
diff --git a/libs/libqrencode/src/rsecc.c b/libs/libqrencode/src/rsecc.c
new file mode 100644
index 0000000000..b88cae3071
--- /dev/null
+++ b/libs/libqrencode/src/rsecc.c
@@ -0,0 +1,149 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Reed solomon error correction code encoder specialized for QR code.
+ * This code is rewritten by Kentaro Fukuchi, referring to the FEC library
+ * developed by Phil Karn (KA9Q).
+ *
+ * Copyright (C) 2002, 2003, 2004, 2006 Phil Karn, KA9Q
+ * Copyright (C) 2014-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+#if HAVE_LIBPTHREAD
+#include <pthread.h>
+#endif
+
+#include "rsecc.h"
+
+#if HAVE_LIBPTHREAD
+static pthread_mutex_t RSECC_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+static int initialized = 0;
+
+#define SYMBOL_SIZE (8)
+#define symbols ((1U << SYMBOL_SIZE) - 1)
+static const unsigned int proot = 0x11d; /* stands for x^8+x^4+x^3+x^2+1 (see pp.37 of JIS X0510:2004) */
+
+/* min/max codeword length of ECC, calculated from the specification. */
+#define min_length (2)
+#define max_length (30)
+#define max_generatorSize (max_length)
+
+static unsigned char alpha[symbols + 1];
+static unsigned char aindex[symbols + 1];
+static unsigned char generator[max_length - min_length + 1][max_generatorSize + 1];
+static unsigned char generatorInitialized[max_length - min_length + 1];
+
+static void RSECC_initLookupTable(void)
+{
+	unsigned int i, b;
+
+	alpha[symbols] = 0;
+	aindex[0] = symbols;
+
+	b = 1;
+	for(i = 0; i < symbols; i++) {
+		alpha[i] = b;
+		aindex[b] = i;
+		b <<= 1;
+		if(b & (symbols + 1)) {
+			b ^= proot;
+		}
+		b &= symbols;
+	}
+}
+
+static void RSECC_init(void)
+{
+	RSECC_initLookupTable();
+	memset(generatorInitialized, 0, (max_length - min_length + 1));
+	initialized = 1;
+}
+
+static void generator_init(size_t length)
+{
+	size_t i, j;
+	int g[max_generatorSize + 1];
+
+	g[0] = 1;
+	for(i = 0; i < length; i++) {
+		g[i + 1] = 1;
+		/* Because g[0] never be zero, skipped some conditional checks. */
+		for(j = i; j > 0; j--) {
+			g[j] = g[j - 1] ^  alpha[(aindex[g[j]] + i) % symbols];
+		}
+		g[0] = alpha[(aindex[g[0]] + i) % symbols];
+	}
+
+	for(i = 0; i <= length; i++) {
+		generator[length - min_length][i] = aindex[g[i]];
+	}
+
+	generatorInitialized[length - min_length] = 1;
+}
+
+int RSECC_encode(size_t data_length, size_t ecc_length, const unsigned char *data, unsigned char *ecc)
+{
+	size_t i, j;
+	unsigned char feedback;
+	unsigned char *gen;
+
+#if HAVE_LIBPTHREAD
+	pthread_mutex_lock(&RSECC_mutex);
+#endif
+	if(!initialized) {
+		RSECC_init();
+	}
+#if HAVE_LIBPTHREAD
+	pthread_mutex_unlock(&RSECC_mutex);
+#endif
+
+	if(ecc_length > max_length) return -1;
+
+	memset(ecc, 0, ecc_length);
+#if HAVE_LIBPTHREAD
+	pthread_mutex_lock(&RSECC_mutex);
+#endif
+	if(!generatorInitialized[ecc_length - min_length]) generator_init(ecc_length);
+#if HAVE_LIBPTHREAD
+	pthread_mutex_unlock(&RSECC_mutex);
+#endif
+	gen = generator[ecc_length - min_length];
+
+	for(i = 0; i < data_length; i++) {
+		feedback = aindex[data[i] ^ ecc[0]];
+		if(feedback != symbols) {
+			for(j = 1; j < ecc_length; j++) {
+				ecc[j] ^= alpha[(unsigned int)(feedback + gen[ecc_length - j]) % symbols];
+			}
+		}
+		memmove(&ecc[0], &ecc[1], ecc_length - 1);
+		if(feedback != symbols) {
+			ecc[ecc_length - 1] = alpha[(unsigned int)(feedback + gen[0]) % symbols];
+		} else {
+			ecc[ecc_length - 1] = 0;
+		}
+	}
+
+	return 0;
+}
diff --git a/libs/libqrencode/src/rsecc.h b/libs/libqrencode/src/rsecc.h
new file mode 100644
index 0000000000..2c17dedb92
--- /dev/null
+++ b/libs/libqrencode/src/rsecc.h
@@ -0,0 +1,31 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Reed solomon error correction code encoder specialized for QR code.
+ * This code is rewritten by Kentaro Fukuchi, referring to the FEC library
+ * developed by Phil Karn (KA9Q).
+ *
+ * Copyright (C) 2002, 2003, 2004, 2006 Phil Karn, KA9Q
+ * Copyright (C) 2014-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef RSECC_H
+#define RSECC_H
+
+extern int RSECC_encode(size_t data_length, size_t ecc_length, const unsigned char *data, unsigned char *ecc);
+
+#endif /* RSECC_H */
diff --git a/libs/libqrencode/src/split.c b/libs/libqrencode/src/split.c
new file mode 100644
index 0000000000..1361066b63
--- /dev/null
+++ b/libs/libqrencode/src/split.c
@@ -0,0 +1,321 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Input data splitter.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ *  or
+ * "Automatic identification and data capture techniques --
+ *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include "qrencode.h"
+#include "qrinput.h"
+#include "qrspec.h"
+#include "split.h"
+
+#define isdigit(__c__) ((unsigned char)((signed char)(__c__) - '0') < 10)
+#define isalnum(__c__) (QRinput_lookAnTable(__c__) >= 0)
+
+#if !HAVE_STRDUP
+#undef strdup
+char *strdup(const char *s)
+{
+	size_t len = strlen(s) + 1;
+	void *newstring = malloc(len);
+	if(newstring == NULL) return NULL;
+	return (char *)memcpy(newstring, s, len);
+}
+#endif
+
+static QRencodeMode Split_identifyMode(const char *string, QRencodeMode hint)
+{
+	unsigned char c, d;
+	unsigned int word;
+
+	c = (unsigned char)string[0];
+
+	if(c == '\0') return QR_MODE_NUL;
+	if(isdigit(c)) {
+		return QR_MODE_NUM;
+	} else if(isalnum(c)) {
+		return QR_MODE_AN;
+	} else if(hint == QR_MODE_KANJI) {
+		d = (unsigned char)string[1];
+		if(d != '\0') {
+			word = ((unsigned int)c << 8) | d;
+			if((word >= 0x8140 && word <= 0x9ffc) || (word >= 0xe040 && word <= 0xebbf)) {
+				return QR_MODE_KANJI;
+			}
+		}
+	}
+
+	return QR_MODE_8;
+}
+
+static int Split_eatAn(const char *string, QRinput *input, QRencodeMode hint);
+static int Split_eat8(const char *string, QRinput *input, QRencodeMode hint);
+
+static int Split_eatNum(const char *string, QRinput *input,QRencodeMode hint)
+{
+	const char *p;
+	int ret;
+	int run;
+	int dif;
+	int ln;
+	QRencodeMode mode;
+
+	ln = QRspec_lengthIndicator(QR_MODE_NUM, input->version);
+
+	p = string;
+	while(isdigit(*p)) {
+		p++;
+	}
+	run = (int)(p - string);
+	mode = Split_identifyMode(p, hint);
+	if(mode == QR_MODE_8) {
+		dif = QRinput_estimateBitsModeNum(run) + 4 + ln
+			+ QRinput_estimateBitsMode8(1) /* + 4 + l8 */
+			- QRinput_estimateBitsMode8(run + 1) /* - 4 - l8 */;
+		if(dif > 0) {
+			return Split_eat8(string, input, hint);
+		}
+	}
+	if(mode == QR_MODE_AN) {
+		dif = QRinput_estimateBitsModeNum(run) + 4 + ln
+			+ QRinput_estimateBitsModeAn(1) /* + 4 + la */
+			- QRinput_estimateBitsModeAn(run + 1) /* - 4 - la */;
+		if(dif > 0) {
+			return Split_eatAn(string, input, hint);
+		}
+	}
+
+	ret = QRinput_append(input, QR_MODE_NUM, run, (unsigned char *)string);
+	if(ret < 0) return -1;
+
+	return run;
+}
+
+static int Split_eatAn(const char *string, QRinput *input, QRencodeMode hint)
+{
+	const char *p, *q;
+	int ret;
+	int run;
+	int dif;
+	int la, ln;
+
+	la = QRspec_lengthIndicator(QR_MODE_AN, input->version);
+	ln = QRspec_lengthIndicator(QR_MODE_NUM, input->version);
+
+	p = string;
+	while(isalnum(*p)) {
+		if(isdigit(*p)) {
+			q = p;
+			while(isdigit(*q)) {
+				q++;
+			}
+			dif = QRinput_estimateBitsModeAn((int)(p - string)) /* + 4 + la */
+				+ QRinput_estimateBitsModeNum((int)(q - p)) + 4 + ln
+				+ (isalnum(*q)?(4 + ln):0)
+				- QRinput_estimateBitsModeAn((int)(q - string)) /* - 4 - la */;
+			if(dif < 0) {
+				break;
+			}
+			p = q;
+		} else {
+			p++;
+		}
+	}
+
+	run = (int)(p - string);
+
+	if(*p && !isalnum(*p)) {
+		dif = QRinput_estimateBitsModeAn(run) + 4 + la
+			+ QRinput_estimateBitsMode8(1) /* + 4 + l8 */
+			- QRinput_estimateBitsMode8(run + 1) /* - 4 - l8 */;
+		if(dif > 0) {
+			return Split_eat8(string, input, hint);
+		}
+	}
+
+	ret = QRinput_append(input, QR_MODE_AN, run, (unsigned char *)string);
+	if(ret < 0) return -1;
+
+	return run;
+}
+
+static int Split_eatKanji(const char *string, QRinput *input, QRencodeMode hint)
+{
+	const char *p;
+	int ret;
+	int run;
+
+	p = string;
+	while(Split_identifyMode(p, hint) == QR_MODE_KANJI) {
+		p += 2;
+	}
+	run = (int)(p - string);
+	ret = QRinput_append(input, QR_MODE_KANJI, run, (unsigned char *)string);
+	if(ret < 0) return -1;
+
+	return run;
+}
+
+static int Split_eat8(const char *string, QRinput *input, QRencodeMode hint)
+{
+	const char *p, *q;
+	QRencodeMode mode;
+	int ret;
+	int run;
+	int dif;
+	int la, ln, l8;
+	int swcost;
+
+	la = QRspec_lengthIndicator(QR_MODE_AN, input->version);
+	ln = QRspec_lengthIndicator(QR_MODE_NUM, input->version);
+	l8 = QRspec_lengthIndicator(QR_MODE_8, input->version);
+
+	p = string + 1;
+	while(*p != '\0') {
+		mode = Split_identifyMode(p, hint);
+		if(mode == QR_MODE_KANJI) {
+			break;
+		}
+		if(mode == QR_MODE_NUM) {
+			q = p;
+			while(isdigit(*q)) {
+				q++;
+			}
+			if(Split_identifyMode(q, hint) == QR_MODE_8) {
+				swcost = 4 + l8;
+			} else {
+				swcost = 0;
+			}
+			dif = QRinput_estimateBitsMode8((int)(p - string)) /* + 4 + l8 */
+				+ QRinput_estimateBitsModeNum((int)(q - p)) + 4 + ln
+				+ swcost
+				- QRinput_estimateBitsMode8((int)(q - string)) /* - 4 - l8 */;
+			if(dif < 0) {
+				break;
+			}
+			p = q;
+		} else if(mode == QR_MODE_AN) {
+			q = p;
+			while(isalnum(*q)) {
+				q++;
+			}
+			if(Split_identifyMode(q, hint) == QR_MODE_8) {
+				swcost = 4 + l8;
+			} else {
+				swcost = 0;
+			}
+			dif = QRinput_estimateBitsMode8((int)(p - string)) /* + 4 + l8 */
+				+ QRinput_estimateBitsModeAn((int)(q - p)) + 4 + la
+				+ swcost
+				- QRinput_estimateBitsMode8((int)(q - string)) /* - 4 - l8 */;
+			if(dif < 0) {
+				break;
+			}
+			p = q;
+		} else {
+			p++;
+		}
+	}
+
+	run = (int)(p - string);
+	ret = QRinput_append(input, QR_MODE_8, run, (unsigned char *)string);
+	if(ret < 0) return -1;
+
+	return run;
+}
+
+static int Split_splitString(const char *string, QRinput *input,
+		QRencodeMode hint)
+{
+	int length;
+	QRencodeMode mode;
+
+	if(*string == '\0') return 0;
+
+	mode = Split_identifyMode(string, hint);
+	if(mode == QR_MODE_NUM) {
+		length = Split_eatNum(string, input, hint);
+	} else if(mode == QR_MODE_AN) {
+		length = Split_eatAn(string, input, hint);
+	} else if(mode == QR_MODE_KANJI && hint == QR_MODE_KANJI) {
+		length = Split_eatKanji(string, input, hint);
+	} else {
+		length = Split_eat8(string, input, hint);
+	}
+	if(length == 0) return 0;
+	if(length < 0) return -1;
+	return Split_splitString(&string[length], input, hint);
+}
+
+static char *dupAndToUpper(const char *str, QRencodeMode hint)
+{
+	char *newstr, *p;
+	QRencodeMode mode;
+
+	newstr = strdup(str);
+	if(newstr == NULL) return NULL;
+
+	p = newstr;
+	while(*p != '\0') {
+		mode = Split_identifyMode(p, hint);
+		if(mode == QR_MODE_KANJI) {
+			p += 2;
+		} else {
+			if (*p >= 'a' && *p <= 'z') {
+				*p = (char)((int)*p - 32);
+			}
+			p++;
+		}
+	}
+
+	return newstr;
+}
+
+int Split_splitStringToQRinput(const char *string, QRinput *input,
+		QRencodeMode hint, int casesensitive)
+{
+	char *newstr;
+	int ret;
+
+	if(string == NULL || *string == '\0') {
+		errno = EINVAL;
+		return -1;
+	}
+	if(!casesensitive) {
+		newstr = dupAndToUpper(string, hint);
+		if(newstr == NULL) return -1;
+		ret = Split_splitString(newstr, input, hint);
+		free(newstr);
+	} else {
+		ret = Split_splitString(string, input, hint);
+	}
+
+	return ret;
+}
diff --git a/libs/libqrencode/src/split.h b/libs/libqrencode/src/split.h
new file mode 100644
index 0000000000..81829e078e
--- /dev/null
+++ b/libs/libqrencode/src/split.h
@@ -0,0 +1,47 @@
+/*
+ * qrencode - QR Code encoder
+ *
+ * Input data splitter.
+ * Copyright (C) 2006-2017 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ *  or
+ * "Automatic identification and data capture techniques --
+ *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SPLIT_H
+#define SPLIT_H
+
+#include "qrencode.h"
+
+/**
+ * Split the input string (null terminated) into QRinput.
+ * @param string input string
+ * @param hint give QR_MODE_KANJI if the input string contains Kanji character encoded in Shift-JIS. If not, give QR_MODE_8.
+ * @param casesensitive 0 for case-insensitive encoding (all alphabet characters are replaced to UPPER-CASE CHARACTERS.
+ * @retval 0 success.
+ * @retval -1 an error occurred. errno is set to indicate the error. See
+ *               Exceptions for the details.
+ * @throw EINVAL invalid input object.
+ * @throw ENOMEM unable to allocate memory for input objects.
+ */
+extern int Split_splitStringToQRinput(const char *string, QRinput *input,
+		QRencodeMode hint, int casesensitive);
+
+#endif /* SPLIT_H */
diff --git a/libs/libqrencode/src/stdafx.cxx b/libs/libqrencode/src/stdafx.cxx
new file mode 100644
index 0000000000..46cd18892b
--- /dev/null
+++ b/libs/libqrencode/src/stdafx.cxx
@@ -0,0 +1,2 @@
+
+#include "stdafx.h"
diff --git a/libs/libqrencode/src/stdafx.h b/libs/libqrencode/src/stdafx.h
new file mode 100644
index 0000000000..c3c1d36b63
--- /dev/null
+++ b/libs/libqrencode/src/stdafx.h
@@ -0,0 +1,24 @@
+/*
+
+Miranda NG: the free IM client for Microsoft* Windows*
+
+Copyright (c) 2012-19 Miranda NG team (https://miranda-ng.org),
+all portions of this codebase are copyrighted to the people
+listed in contributors.txt.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*/
+
+#pragma once