From d9ba54db9c60f8d3261b6ed54065e81d94a98165 Mon Sep 17 00:00:00 2001
From: George Hazan <george.hazan@gmail.com>
Date: Mon, 3 Jun 2013 22:15:25 +0000
Subject: mir_base64_decode & mir_base64_encode moved to mir_core.dll

git-svn-id: http://svn.miranda-ng.org/main/trunk@4877 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
---
 src/mir_core/mir_core.def |   2 +
 src/mir_core/utils.cpp    | 103 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 105 insertions(+)

(limited to 'src/mir_core')

diff --git a/src/mir_core/mir_core.def b/src/mir_core/mir_core.def
index 44ad59c86a..5f08ae2836 100644
--- a/src/mir_core/mir_core.def
+++ b/src/mir_core/mir_core.def
@@ -159,3 +159,5 @@ ltrimpw                       @156
 wildcmpw                      @157
 wildcmpi                      @158
 wildcmpiw                     @159
+mir_base64_encode             @160
+mir_base64_decode             @161
diff --git a/src/mir_core/utils.cpp b/src/mir_core/utils.cpp
index 21c9e8dfd5..02593de4fa 100644
--- a/src/mir_core/utils.cpp
+++ b/src/mir_core/utils.cpp
@@ -212,3 +212,106 @@ MIR_CORE_DLL(int) wildcmpiw(const WCHAR *name, const WCHAR *mask)
 		if (*mask != '?' && _qtoupper(*mask)  != _qtoupper(*name)) name -= (size_t)(mask - last) - 1, mask = last;
 	}
 }
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+MIR_CORE_DLL(char*) mir_base64_encode(const BYTE *input, unsigned inputLen)
+{
+	if (input == NULL)
+		return NULL;
+
+	size_t i = 0;
+	char chr[3], enc[4];
+	static char cb64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+	size_t length = inputLen;
+	size_t nLength = 4 * ((length + 2) / 3) + 1;
+
+	char *output = (char *)mir_alloc(nLength);
+	char *p = output;
+
+	while (i < length)
+	{
+		chr[0] = input[i++];
+		chr[1] = input[i++];
+		chr[2] = input[i++];
+
+		enc[0] = chr[0] >> 2;
+		enc[1] = ((chr[0] & 0x03) << 4) | (chr[1] >> 4);
+		enc[2] = ((chr[1] & 0x0F) << 2) | (chr[2] >> 6);
+		enc[3] = chr[2] & 0x3F;
+
+		*p++ = cb64[enc[0]]; *p++ = cb64[enc[1]];
+
+		if (i - 2 >= length) { *p++ = '='; *p++ = '='; }
+		else if (i - 1 >= length) { *p++ = cb64[enc[2]]; *p++ = '='; }
+		else { *p++ = cb64[enc[2]]; *p++ = cb64[enc[3]]; }
+	}
+
+	*p = 0;
+
+	return output;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+
+static int Base64DecodeTable[] =
+{
+	-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,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
+	52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1,-1,-1,-1,
+	-1, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,
+	15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
+	-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
+	41,42,43,44, 45,46,47,48, 49,50,51,-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,
+	-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,-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,-1,-1, -1,-1,-1,-1,
+	-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1
+};
+
+MIR_CORE_DLL(void*) mir_base64_decode(const char *input, unsigned *outputLen)
+{
+	if (input == NULL)
+		return NULL;
+
+	size_t i = 0;
+	char chr[3], enc[4];
+
+	size_t length = strlen(input);
+	size_t nLength = (length / 4) * 3 + 1;
+
+	char *output = (char *)mir_alloc(nLength);
+	char *p = output;
+
+	while (i < length)
+	{
+		enc[0] = Base64DecodeTable[input[i++]];
+		enc[1] = Base64DecodeTable[input[i++]];
+		enc[2] = Base64DecodeTable[input[i++]];
+		enc[3] = Base64DecodeTable[input[i++]];
+
+		if (enc[0] == -1 || enc[1] == -1) break;
+
+		chr[0] = (enc[0] << 2) | (enc[1] >> 4);
+		chr[1] = ((enc[1] & 15) << 4) | (enc[2] >> 2);
+		chr[2] = ((enc[2] & 3) << 6) | enc[3];
+
+		*p++ = chr[0];
+
+		if (enc[2] != -1) *p++ = chr[1];
+		if (enc[3] != -1) *p++ = chr[2];
+	}
+
+	*p = 0;
+
+	if (outputLen != NULL)
+		*outputLen = (unsigned)nLength;
+
+	return output;
+}
-- 
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