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-/*************************************************************************************************
- * C language binding
- * Copyright (C) 2009-2012 FAL Labs
- * This file is part of Kyoto Cabinet.
- * 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
- * 3 of the License, or 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, see <http://www.gnu.org/licenses/>.
- *************************************************************************************************/
-
-
-#ifndef _KCLANGC_H /* duplication check */
-#define _KCLANGC_H
-
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
-#if !defined(__STDC_LIMIT_MACROS)
-#define __STDC_LIMIT_MACROS 1 /**< enable limit macros for C++ */
-#endif
-
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include <float.h>
-#include <limits.h>
-#include <locale.h>
-#include <math.h>
-#include <setjmp.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <string.h>
-#include <time.h>
-#include <stdint.h>
-
-
-/**
- * C wrapper of polymorphic database.
- */
-typedef struct {
- void* db; /**< dummy member */
-} KCDB;
-
-
-/**
- * C wrapper of polymorphic cursor.
- */
-typedef struct {
- void* cur; /**< dummy member */
-} KCCUR;
-
-
-/**
- * Binary string of byte array.
- */
-typedef struct {
- char* buf; /**< pointer to the data region */
- size_t size; /**< size of the data region */
-} KCSTR;
-
-
-/**
- * Key-Value record.
- */
-typedef struct {
- KCSTR key; /**< key string */
- KCSTR value; /**< value string */
-} KCREC;
-
-
-/**
- * Error codes.
- */
-enum {
- KCESUCCESS, /**< success */
- KCENOIMPL, /**< not implemented */
- KCEINVALID, /**< invalid operation */
- KCENOREPOS, /**< no repository */
- KCENOPERM, /**< no permission */
- KCEBROKEN, /**< broken file */
- KCEDUPREC, /**< record duplication */
- KCENOREC, /**< no record */
- KCELOGIC, /**< logical inconsistency */
- KCESYSTEM, /**< system error */
- KCEMISC = 15 /**< miscellaneous error */
-};
-
-
-/**
- * Open modes.
- */
-enum {
- KCOREADER = 1 << 0, /**< open as a reader */
- KCOWRITER = 1 << 1, /**< open as a writer */
- KCOCREATE = 1 << 2, /**< writer creating */
- KCOTRUNCATE = 1 << 3, /**< writer truncating */
- KCOAUTOTRAN = 1 << 4, /**< auto transaction */
- KCOAUTOSYNC = 1 << 5, /**< auto synchronization */
- KCONOLOCK = 1 << 6, /**< open without locking */
- KCOTRYLOCK = 1 << 7, /**< lock without blocking */
- KCONOREPAIR = 1 << 8 /**< open without auto repair */
-};
-
-
-/**
- * Merge modes.
- */
-enum {
- KCMSET, /**< overwrite the existing value */
- KCMADD, /**< keep the existing value */
- KCMREPLACE, /**< modify the existing record only */
- KCMAPPEND /**< append the new value */
-};
-
-
-/** The package version. */
-extern const char* const KCVERSION;
-
-
-/** Special pointer for no operation by the visiting function. */
-extern const char* const KCVISNOP;
-
-
-/** Special pointer to remove the record by the visiting function. */
-extern const char* const KCVISREMOVE;
-
-
-/**
- * Call back function to visit a full record.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param opq an opaque pointer.
- * @return If it is the pointer to a region, the value is replaced by the content. If it
- * is KCVISNOP, nothing is modified. If it is KCVISREMOVE, the record is removed.
- */
-typedef const char* (*KCVISITFULL)(const char* kbuf, size_t ksiz,
- const char* vbuf, size_t vsiz, size_t* sp, void* opq);
-
-
-/**
- * Call back function to visit an empty record.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param opq an opaque pointer.
- * @return If it is the pointer to a region, the value is replaced by the content. If it
- * is KCVISNOP or KCVISREMOVE, nothing is modified.
- */
-typedef const char* (*KCVISITEMPTY)(const char* kbuf, size_t ksiz, size_t* sp, void* opq);
-
-
-/**
- * Call back function to process the database file.
- * @param path the path of the database file.
- * @param count the number of records.
- * @param size the size of the available region.
- * @param opq an opaque pointer.
- * @return true on success, or false on failure.
- */
-typedef int32_t (*KCFILEPROC)(const char* path, int64_t count, int64_t size, void* opq);
-
-
-/**
- * Allocate a region on memory.
- * @param size the size of the region.
- * @return the pointer to the allocated region. The region of the return value should be
- * released with the kcfree function when it is no longer in use.
- */
-void* kcmalloc(size_t size);
-
-
-/**
- * Release a region allocated in the library.
- * @param ptr the pointer to the region.
- */
-void kcfree(void* ptr);
-
-
-/**
- * Get the time of day in seconds.
- * @return the time of day in seconds. The accuracy is in microseconds.
- */
-double kctime(void);
-
-
-/**
- * Convert a string to an integer.
- * @param str specifies the string.
- * @return the integer. If the string does not contain numeric expression, 0 is returned.
- */
-int64_t kcatoi(const char* str);
-
-
-/**
- * Convert a string with a metric prefix to an integer.
- * @param str the string, which can be trailed by a binary metric prefix. "K", "M", "G", "T",
- * "P", and "E" are supported. They are case-insensitive.
- * @return the integer. If the string does not contain numeric expression, 0 is returned. If
- * the integer overflows the domain, INT64_MAX or INT64_MIN is returned according to the
- * sign.
- */
-int64_t kcatoix(const char* str);
-
-
-/**
- * Convert a string to a real number.
- * @param str specifies the string.
- * @return the real number. If the string does not contain numeric expression, 0.0 is
- * returned.
- */
-double kcatof(const char* str);
-
-
-/**
- * Get the hash value by MurMur hashing.
- * @param buf the source buffer.
- * @param size the size of the source buffer.
- * @return the hash value.
- */
-uint64_t kchashmurmur(const void* buf, size_t size);
-
-
-/**
- * Get the hash value by FNV hashing.
- * @param buf the source buffer.
- * @param size the size of the source buffer.
- * @return the hash value.
- */
-uint64_t kchashfnv(const void* buf, size_t size);
-
-
-/**
- * Calculate the levenshtein distance of two regions.
- * @param abuf the pointer to the region of one buffer.
- * @param asiz the size of the region of one buffer.
- * @param bbuf the pointer to the region of the other buffer.
- * @param bsiz the size of the region of the other buffer.
- * @param utf flag to treat keys as UTF-8 strings.
- * @return the levenshtein distance of two regions.
- */
-size_t kclevdist(const void* abuf, size_t asiz, const void* bbuf, size_t bsiz, int32_t utf);
-
-
-/**
- * Get the quiet Not-a-Number value.
- * @return the quiet Not-a-Number value.
- */
-double kcnan();
-
-
-/**
- * Get the positive infinity value.
- * @return the positive infinity value.
- */
-double kcinf();
-
-
-/**
- * Check a number is a Not-a-Number value.
- * @return true for the number is a Not-a-Number value, or false if not.
- */
-int32_t kcchknan(double num);
-
-
-/**
- * Check a number is an infinity value.
- * @return true for the number is an infinity value, or false if not.
- */
-int32_t kcchkinf(double num);
-
-
-/**
- * Get the readable string of an error code.
- * @param code the error code.
- * @return the readable string of the error code.
- */
-const char* kcecodename(int32_t code);
-
-
-/**
- * Create a polymorphic database object.
- * @return the created database object.
- * @note The object of the return value should be released with the kcdbdel function when it is
- * no longer in use.
- */
-KCDB* kcdbnew(void);
-
-
-/**
- * Destroy a database object.
- * @param db the database object.
- */
-void kcdbdel(KCDB* db);
-
-
-/**
- * Open a database file.
- * @param db a database object.
- * @param path the path of a database file. If it is "-", the database will be a prototype
- * hash database. If it is "+", the database will be a prototype tree database. If it is ":",
- * the database will be a stash database. If it is "*", the database will be a cache hash
- * database. If it is "%", the database will be a cache tree database. If its suffix is
- * ".kch", the database will be a file hash database. If its suffix is ".kct", the database
- * will be a file tree database. If its suffix is ".kcd", the database will be a directory
- * hash database. If its suffix is ".kcf", the database will be a directory tree database.
- * If its suffix is ".kcx", the database will be a plain text database. Otherwise, this
- * function fails. Tuning parameters can trail the name, separated by "#". Each parameter is
- * composed of the name and the value, separated by "=". If the "type" parameter is specified,
- * the database type is determined by the value in "-", "+", ":", "*", "%", "kch", "kct",
- * "kcd", kcf", and "kcx". All database types support the logging parameters of "log",
- * "logkinds", and "logpx". The prototype hash database and the prototype tree database do
- * not support any other tuning parameter. The stash database supports "bnum". The cache
- * hash database supports "opts", "bnum", "zcomp", "capcnt", "capsiz", and "zkey". The cache
- * tree database supports all parameters of the cache hash database except for capacity
- * limitation, and supports "psiz", "rcomp", "pccap" in addition. The file hash database
- * supports "apow", "fpow", "opts", "bnum", "msiz", "dfunit", "zcomp", and "zkey". The file
- * tree database supports all parameters of the file hash database and "psiz", "rcomp",
- * "pccap" in addition. The directory hash database supports "opts", "zcomp", and "zkey".
- * The directory tree database supports all parameters of the directory hash database and
- * "psiz", "rcomp", "pccap" in addition. The plain text database does not support any other
- * tuning parameter.
- * @param mode the connection mode. KCOWRITER as a writer, KCOREADER as a reader.
- * The following may be added to the writer mode by bitwise-or: KCOCREATE, which means
- * it creates a new database if the file does not exist, KCOTRUNCATE, which means it
- * creates a new database regardless if the file exists, KCOAUTOTRAN, which means each
- * updating operation is performed in implicit transaction, KCOAUTOSYNC, which means
- * each updating operation is followed by implicit synchronization with the file system. The
- * following may be added to both of the reader mode and the writer mode by bitwise-or:
- * KCONOLOCK, which means it opens the database file without file locking,
- * KCOTRYLOCK, which means locking is performed without blocking, KCONOREPAIR, which
- * means the database file is not repaired implicitly even if file destruction is detected.
- * @return true on success, or false on failure.
- * @note The tuning parameter "log" is for the original "tune_logger" and the value specifies
- * the path of the log file, or "-" for the standard output, or "+" for the standard error.
- * "logkinds" specifies kinds of logged messages and the value can be "debug", "info", "warn",
- * or "error". "logpx" specifies the prefix of each log message. "opts" is for "tune_options"
- * and the value can contain "s" for the small option, "l" for the linear option, and "c" for
- * the compress option. "bnum" corresponds to "tune_bucket". "zcomp" is for "tune_compressor"
- * and the value can be "zlib" for the ZLIB raw compressor, "def" for the ZLIB deflate
- * compressor, "gz" for the ZLIB gzip compressor, "lzo" for the LZO compressor, "lzma" for the
- * LZMA compressor, or "arc" for the Arcfour cipher. "zkey" specifies the cipher key of the
- * compressor. "capcount" is for "cap_count". "capsize" is for "cap_size". "psiz" is for
- * "tune_page". "rcomp" is for "tune_comparator" and the value can be "lex" for the lexical
- * comparator or "dec" for the decimal comparator. "pccap" is for "tune_page_cache". "apow"
- * is for "tune_alignment". "fpow" is for "tune_fbp". "msiz" is for "tune_map". "dfunit" is
- * for "tune_defrag". Every opened database must be closed by the kcdbclose method when it is
- * no longer in use. It is not allowed for two or more database objects in the same process to
- * keep their connections to the same database file at the same time.
- */
-int32_t kcdbopen(KCDB* db, const char* path, uint32_t mode);
-
-
-/**
- * Close the database file.
- * @param db a database object.
- * @return true on success, or false on failure.
- */
-int32_t kcdbclose(KCDB* db);
-
-
-/**
- * Get the code of the last happened error.
- * @param db a database object.
- * @return the code of the last happened error.
- */
-int32_t kcdbecode(KCDB* db);
-
-
-/**
- * Get the supplement message of the last happened error.
- * @param db a database object.
- * @return the supplement message of the last happened error.
- */
-const char* kcdbemsg(KCDB* db);
-
-
-/**
- * Accept a visitor to a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param fullproc a call back function to visit a record.
- * @param emptyproc a call back function to visit an empty record space.
- * @param opq an opaque pointer to be given to the call back functions.
- * @param writable true for writable operation, or false for read-only operation.
- * @return true on success, or false on failure.
- * @note The operation for each record is performed atomically and other threads accessing the
- * same record are blocked. To avoid deadlock, any explicit database operation must not be
- * performed in this function.
- */
-int32_t kcdbaccept(KCDB* db, const char* kbuf, size_t ksiz,
- KCVISITFULL fullproc, KCVISITEMPTY emptyproc, void* opq, int32_t writable);
-
-
-/**
- * Accept a visitor to multiple records at once.
- * @param db a database object.
- * @param keys specifies an array of binary strings of the keys.
- * @param knum specifies the number of the keys.
- * @param fullproc a call back function to visit a record.
- * @param emptyproc a call back function to visit an empty record space.
- * @param opq an opaque pointer to be given to the call back functions.
- * @param writable true for writable operation, or false for read-only operation.
- * @return true on success, or false on failure.
- * @note The operations for specified records are performed atomically and other threads
- * accessing the same records are blocked. To avoid deadlock, any explicit database operation
- * must not be performed in this function.
- */
-int32_t kcdbacceptbulk(KCDB* db, const KCSTR* keys, size_t knum,
- KCVISITFULL fullproc, KCVISITEMPTY emptyproc,
- void* opq, int32_t writable);
-
-
-/**
- * Iterate to accept a visitor for each record.
- * @param db a database object.
- * @param fullproc a call back function to visit a record.
- * @param opq an opaque pointer to be given to the call back function.
- * @param writable true for writable operation, or false for read-only operation.
- * @return true on success, or false on failure.
- * @note The whole iteration is performed atomically and other threads are blocked. To avoid
- * deadlock, any explicit database operation must not be performed in this function.
- */
-int32_t kcdbiterate(KCDB* db, KCVISITFULL fullproc, void* opq, int32_t writable);
-
-
-/**
- * Scan each record in parallel.
- * @param db a database object.
- * @param fullproc a call back function to visit a record.
- * @param opq an opaque pointer to be given to the call back function.
- * @param thnum the number of worker threads.
- * @return true on success, or false on failure.
- * @note This function is for reading records and not for updating ones. The return value of
- * the visitor is just ignored. To avoid deadlock, any explicit database operation must not
- * be performed in this function.
- */
-int32_t kcdbscanpara(KCDB* db, KCVISITFULL fullproc, void* opq, size_t thnum);
-
-
-/**
- * Set the value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the value is overwritten.
- */
-int32_t kcdbset(KCDB* db, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Add a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the record is not modified and false is returned.
- */
-int32_t kcdbadd(KCDB* db, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Replace the value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, no new record is created and false is returned.
- * If the corresponding record exists, the value is modified.
- */
-int32_t kcdbreplace(KCDB* db, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Append the value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the given value is appended at the end of the existing value.
- */
-int32_t kcdbappend(KCDB* db, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Add a number to the numeric value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param num the additional number.
- * @param orig the origin number if no record corresponds to the key. If it is INT64_MIN and
- * no record corresponds, this function fails. If it is INT64_MAX, the value is set as the
- * additional number regardless of the current value.
- * @return the result value, or INT64_MIN on failure.
- * @note The value is serialized as an 8-byte binary integer in big-endian order, not a decimal
- * string. If existing value is not 8-byte, this function fails.
- */
-int64_t kcdbincrint(KCDB* db, const char* kbuf, size_t ksiz, int64_t num, int64_t orig);
-
-
-/**
- * Add a number to the numeric value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param num the additional number.
- * @param orig the origin number if no record corresponds to the key. If it is negative
- * infinity and no record corresponds, this function fails. If it is positive infinity, the
- * value is set as the additional number regardless of the current value.
- * @return the result value, or Not-a-number on failure.
- * @note The value is serialized as an 16-byte binary fixed-point number in big-endian order,
- * not a decimal string. If existing value is not 16-byte, this function fails.
- */
-double kcdbincrdouble(KCDB* db, const char* kbuf, size_t ksiz, double num, double orig);
-
-
-/**
- * Perform compare-and-swap.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param ovbuf the pointer to the old value region. NULL means that no record corresponds.
- * @param ovsiz the size of the old value region.
- * @param nvbuf the pointer to the new value region. NULL means that the record is removed.
- * @param nvsiz the size of new old value region.
- * @return true on success, or false on failure.
- */
-int32_t kcdbcas(KCDB* db, const char* kbuf, size_t ksiz,
- const char* ovbuf, size_t ovsiz, const char* nvbuf, size_t nvsiz);
-
-
-/**
- * Remove a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, false is returned.
- */
-int32_t kcdbremove(KCDB* db, const char* kbuf, size_t ksiz);
-
-
-/**
- * Retrieve the value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the corresponding record, or NULL on failure.
- * @note If no record corresponds to the key, NULL is returned. Because an additional zero
- * code is appended at the end of the region of the return value, the return value can be
- * treated as a C-style string. The region of the return value should be released with the
- * kcfree function when it is no longer in use.
- */
-char* kcdbget(KCDB* db, const char* kbuf, size_t ksiz, size_t* sp);
-
-
-/**
- * Check the existence of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return the size of the value, or -1 on failure.
- */
-int32_t kcdbcheck(KCDB* db, const char* kbuf, size_t ksiz);
-
-
-/**
- * Retrieve the value of a record.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the buffer into which the value of the corresponding record is
- * written.
- * @param max the size of the buffer.
- * @return the size of the value, or -1 on failure.
- */
-int32_t kcdbgetbuf(KCDB* db, const char* kbuf, size_t ksiz, char* vbuf, size_t max);
-
-
-/**
- * Retrieve the value of a record and remove it atomically.
- * @param db a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the corresponding record, or NULL on failure.
- * @note If no record corresponds to the key, NULL is returned. Because an additional zero
- * code is appended at the end of the region of the return value, the return value can be
- * treated as a C-style string. The region of the return value should be released with the
- * kcfree function when it is no longer in use.
- */
-char* kcdbseize(KCDB* db, const char* kbuf, size_t ksiz, size_t* sp);
-
-
-/**
- * Store records at once.
- * @param db a database object.
- * @param recs the records to store.
- * @param rnum specifies the number of the records.
- * @param atomic true to perform all operations atomically, or false for non-atomic operations.
- * @return the number of stored records, or -1 on failure.
- */
-int64_t kcdbsetbulk(KCDB* db, const KCREC* recs, size_t rnum, int32_t atomic);
-
-
-/**
- * Remove records at once.
- * @param db a database object.
- * @param keys the keys of the records to remove.
- * @param knum specifies the number of the keys.
- * @param atomic true to perform all operations atomically, or false for non-atomic operations.
- * @return the number of removed records, or -1 on failure.
- */
-int64_t kcdbremovebulk(KCDB* db, const KCSTR* keys, size_t knum, int32_t atomic);
-
-
-/**
- * Retrieve records at once.
- * @param db a database object.
- * @param keys the keys of the records to retrieve.
- * @param knum specifies the number of the keys.
- * @param recs an array to contain the result. Its size must be sufficient.
- * @param atomic true to perform all operations atomically, or false for non-atomic operations.
- * @return the number of retrieved records, or -1 on failure.
- * @note The regions of the key and the value of each element of the result should be released
- * with the kcfree function when it is no longer in use.
- */
-int64_t kcdbgetbulk(KCDB* db, const KCSTR* keys, size_t knum, KCREC* recs, int32_t atomic);
-
-
-/**
- * Synchronize updated contents with the file and the device.
- * @param db a database object.
- * @param hard true for physical synchronization with the device, or false for logical
- * synchronization with the file system.
- * @param proc a postprocessor call back function. If it is NULL, no postprocessing is
- * performed.
- * @param opq an opaque pointer to be given to the call back function.
- * @return true on success, or false on failure.
- * @note The operation of the postprocessor is performed atomically and other threads accessing
- * the same record are blocked. To avoid deadlock, any explicit database operation must not
- * be performed in this function.
- */
-int32_t kcdbsync(KCDB* db, int32_t hard, KCFILEPROC proc, void* opq);
-
-
-/**
- * Occupy database by locking and do something meanwhile.
- * @param db a database object.
- * @param writable true to use writer lock, or false to use reader lock.
- * @param proc a processor object. If it is NULL, no processing is performed.
- * @param opq an opaque pointer to be given to the call back function.
- * @return true on success, or false on failure.
- * @note The operation of the processor is performed atomically and other threads accessing
- * the same record are blocked. To avoid deadlock, any explicit database operation must not
- * be performed in this function.
- */
-int32_t kcdboccupy(KCDB* db, int32_t writable, KCFILEPROC proc, void* opq);
-
-
-/**
- * Create a copy of the database file.
- * @param db a database object.
- * @param dest the path of the destination file.
- * @return true on success, or false on failure.
- */
-int32_t kcdbcopy(KCDB* db, const char* dest);
-
-
-/**
- * Begin transaction.
- * @param db a database object.
- * @param hard true for physical synchronization with the device, or false for logical
- * synchronization with the file system.
- * @return true on success, or false on failure.
- */
-int32_t kcdbbegintran(KCDB* db, int32_t hard);
-
-
-/**
- * Try to begin transaction.
- * @param db a database object.
- * @param hard true for physical synchronization with the device, or false for logical
- * synchronization with the file system.
- * @return true on success, or false on failure.
- */
-int32_t kcdbbegintrantry(KCDB* db, int32_t hard);
-
-
-/**
- * End transaction.
- * @param db a database object.
- * @param commit true to commit the transaction, or false to abort the transaction.
- * @return true on success, or false on failure.
- */
-int32_t kcdbendtran(KCDB* db, int32_t commit);
-
-
-/**
- * Remove all records.
- * @param db a database object.
- * @return true on success, or false on failure.
- */
-int32_t kcdbclear(KCDB* db);
-
-
-/**
- * Dump records into a file.
- * @param db a database object.
- * @param dest the path of the destination file.
- * @return true on success, or false on failure.
- */
-int32_t kcdbdumpsnap(KCDB* db, const char* dest);
-
-
-/**
- * Load records from a file.
- * @param db a database object.
- * @param src the path of the source file.
- * @return true on success, or false on failure.
- */
-int32_t kcdbloadsnap(KCDB* db, const char* src);
-
-
-/**
- * Get the number of records.
- * @param db a database object.
- * @return the number of records, or -1 on failure.
- */
-int64_t kcdbcount(KCDB* db);
-
-
-/**
- * Get the size of the database file.
- * @param db a database object.
- * @return the size of the database file in bytes, or -1 on failure.
- */
-int64_t kcdbsize(KCDB* db);
-
-
-/**
- * Get the path of the database file.
- * @param db a database object.
- * @return the path of the database file, or an empty string on failure.
- * @note The region of the return value should be released with the kcfree function when it is
- * no longer in use.
- */
-char* kcdbpath(KCDB* db);
-
-
-/**
- * Get the miscellaneous status information.
- * @param db a database object.
- * @return the result string of tab saparated values, or NULL on failure. Each line consists of
- * the attribute name and its value separated by a tab character.
- * @note The region of the return value should be released with the kcfree function when it is
- * no longer in use.
- */
-char* kcdbstatus(KCDB* db);
-
-
-/**
- * Get keys matching a prefix string.
- * @param db a database object.
- * @param prefix the prefix string.
- * @param strary an array to contain the result. Its size must be sufficient.
- * @param max the maximum number to retrieve.
- * @return the number of retrieved keys or -1 on failure.
- * @note The region of each element of the result should be released with the kcfree function
- * when it is no longer in use.
- */
-int64_t kcdbmatchprefix(KCDB* db, const char* prefix, char** strary, size_t max);
-
-
-/**
- * Get keys matching a regular expression string.
- * @param db a database object.
- * @param regex the regular expression string.
- * @param strary an array to contain the result. Its size must be sufficient.
- * @param max the maximum number to retrieve.
- * @return the number of retrieved keys or -1 on failure.
- * @note The region of each element of the result should be released with the kcfree function
- * when it is no longer in use.
- */
-int64_t kcdbmatchregex(KCDB* db, const char* regex, char** strary, size_t max);
-
-
-/**
- * Get keys similar to a string in terms of the levenshtein distance.
- * @param db a database object.
- * @param origin the origin string.
- * @param range the maximum distance of keys to adopt.
- * @param utf flag to treat keys as UTF-8 strings.
- * @param strary an array to contain the result. Its size must be sufficient.
- * @param max the maximum number to retrieve.
- * @return the number of retrieved keys or -1 on failure.
- * @note The region of each element of the result should be released with the kcfree function
- * when it is no longer in use.
- */
-int64_t kcdbmatchsimilar(KCDB* db, const char* origin, uint32_t range, int32_t utf,
- char** strary, size_t max);
-
-
-/**
- * Merge records from other databases.
- * @param db a database object.
- * @param srcary an array of the source detabase objects.
- * @param srcnum the number of the elements of the source array.
- * @param mode the merge mode. KCMSET to overwrite the existing value, KCMADD to keep the
- * existing value, KCMREPLACE to modify the existing record only, KCMAPPEND to append the new
- * value.
- * @return true on success, or false on failure.
- */
-int32_t kcdbmerge(KCDB* db, KCDB** srcary, size_t srcnum, uint32_t mode);
-
-
-/**
- * Create a polymorphic cursor object.
- * @param db a database object.
- * @return the return value is the created cursor object.
- * @note The object of the return value should be released with the kccurdel function when it is
- * no longer in use.
- */
-KCCUR* kcdbcursor(KCDB* db);
-
-
-/**
- * Destroy a cursor object.
- * @param cur the cursor object.
- */
-void kccurdel(KCCUR* cur);
-
-
-/**
- * Accept a visitor to the current record.
- * @param cur a cursor object.
- * @param fullproc a call back function to visit a record.
- * @param opq an opaque pointer to be given to the call back functions.
- * @param writable true for writable operation, or false for read-only operation.
- * @param step true to move the cursor to the next record, or false for no move.
- * @return true on success, or false on failure.
- * @note The operation for each record is performed atomically and other threads accessing
- * the same record are blocked. To avoid deadlock, any explicit database operation must not
- * be performed in this function.
- */
-int32_t kccuraccept(KCCUR* cur, KCVISITFULL fullproc, void* opq,
- int32_t writable, int32_t step);
-
-
-/**
- * Set the value of the current record.
- * @param cur a cursor object.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @param step true to move the cursor to the next record, or false for no move.
- * @return true on success, or false on failure.
- */
-int32_t kccursetvalue(KCCUR* cur, const char* vbuf, size_t vsiz, int32_t step);
-
-
-/**
- * Remove the current record.
- * @param cur a cursor object.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, false is returned. The cursor is moved to the
- * next record implicitly.
- */
-int32_t kccurremove(KCCUR* cur);
-
-
-/**
- * Get the key of the current record.
- * @param cur a cursor object.
- * @param sp the pointer to the variable into which the size of the region of the return value
- * is assigned.
- * @param step true to move the cursor to the next record, or false for no move.
- * @return the pointer to the key region of the current record, or NULL on failure.
- * @note If the cursor is invalidated, NULL is returned. Because an additional zero
- * code is appended at the end of the region of the return value, the return value can be
- * treated as a C-style string. The region of the return value should be released with the
- * kcfree function when it is no longer in use.
- */
-char* kccurgetkey(KCCUR* cur, size_t* sp, int32_t step);
-
-
-/**
- * Get the value of the current record.
- * @param cur a cursor object.
- * @param sp the pointer to the variable into which the size of the region of the return value
- * is assigned.
- * @param step true to move the cursor to the next record, or false for no move.
- * @return the pointer to the value region of the current record, or NULL on failure.
- * @note If the cursor is invalidated, NULL is returned. Because an additional zero
- * code is appended at the end of the region of the return value, the return value can be
- * treated as a C-style string. The region of the return value should be released with the
- * kcfree function when it is no longer in use.
- */
-char* kccurgetvalue(KCCUR* cur, size_t* sp, int32_t step);
-
-
-/**
- * Get a pair of the key and the value of the current record.
- * @param cur a cursor object.
- * @param ksp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param vbp the pointer to the variable into which the pointer to the value region is
- * assigned.
- * @param vsp the pointer to the variable into which the size of the value region is
- * assigned.
- * @param step true to move the cursor to the next record, or false for no move.
- * @return the pointer to the pair of the key region, or NULL on failure.
- * @note If the cursor is invalidated, NULL is returned. Because an additional zero code is
- * appended at the end of each region of the key and the value, each region can be treated
- * as a C-style string. The region of the return value should be released with the kcfree
- * function when it is no longer in use.
- */
-char* kccurget(KCCUR* cur, size_t* ksp, const char** vbp, size_t* vsp, int32_t step);
-
-
-/**
- * Get a pair of the key and the value of the current record and remove it atomically.
- * @param cur a cursor object.
- * @param ksp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param vbp the pointer to the variable into which the pointer to the value region is
- * assigned.
- * @param vsp the pointer to the variable into which the size of the value region is
- * assigned.
- * @return the pointer to the pair of the key region, or NULL on failure.
- * @note If the cursor is invalidated, NULL is returned. Because an additional zero code is
- * appended at the end of each region of the key and the value, each region can be treated
- * as a C-style string. The region of the return value should be released with the kcfree
- * function when it is no longer in use. The cursor is moved to the next record implicitly.
- */
-char* kccurseize(KCCUR* cur, size_t* ksp, const char** vbp, size_t* vsp);
-
-
-/**
- * Jump the cursor to the first record for forward scan.
- * @param cur a cursor object.
- * @return true on success, or false on failure.
- */
-int32_t kccurjump(KCCUR* cur);
-
-
-/**
- * Jump the cursor to a record for forward scan.
- * @param cur a cursor object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return true on success, or false on failure.
- */
-int32_t kccurjumpkey(KCCUR* cur, const char* kbuf, size_t ksiz);
-
-
-/**
- * Jump the cursor to the last record for backward scan.
- * @param cur a cursor object.
- * @return true on success, or false on failure.
- * @note This method is dedicated to tree databases. Some database types, especially hash
- * databases, may provide a dummy implementation.
- */
-int32_t kccurjumpback(KCCUR* cur);
-
-
-/**
- * Jump the cursor to a record for backward scan.
- * @param cur a cursor object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return true on success, or false on failure.
- * @note This method is dedicated to tree databases. Some database types, especially hash
- * databases, will provide a dummy implementation.
- */
-int32_t kccurjumpbackkey(KCCUR* cur, const char* kbuf, size_t ksiz);
-
-
-/**
- * Step the cursor to the next record.
- * @param cur a cursor object.
- * @return true on success, or false on failure.
- */
-int32_t kccurstep(KCCUR* cur);
-
-
-/**
- * Step the cursor to the previous record.
- * @param cur a cursor object.
- * @return true on success, or false on failure.
- * @note This method is dedicated to tree databases. Some database types, especially hash
- * databases, may provide a dummy implementation.
- */
-int32_t kccurstepback(KCCUR* cur);
-
-
-/**
- * Get the database object.
- * @param cur a cursor object.
- * @return the database object.
- */
-KCDB* kccurdb(KCCUR* cur);
-
-
-/**
- * Get the code of the last happened error.
- * @param cur a cursor object.
- * @return the code of the last happened error.
- */
-int32_t kccurecode(KCCUR* cur);
-
-
-/**
- * Get the supplement message of the last happened error.
- * @param cur a cursor object.
- * @return the supplement message of the last happened error.
- */
-const char* kccuremsg(KCCUR* cur);
-
-
-/**
- * C wrapper of index database.
- */
-typedef struct {
- void* db; /**< dummy member */
-} KCIDX;
-
-
-/**
- * Create an index database object.
- * @return the created database object.
- * @note The object of the return value should be released with the kcidxdel function when it is
- * no longer in use.
- */
-KCIDX* kcidxnew(void);
-
-
-/**
- * Destroy a database object.
- * @param idx the database object.
- */
-void kcidxdel(KCIDX* idx);
-
-
-/**
- * Open a database file.
- * @param idx a database object.
- * @param path the path of a database file. The same as with the polymorphic database.
- * @param mode the connection mode. The same as with the polymorphic database.
- * @return true on success, or false on failure.
- */
-int32_t kcidxopen(KCIDX* idx, const char* path, uint32_t mode);
-
-
-/**
- * Close the database file.
- * @param idx a database object.
- * @return true on success, or false on failure.
- */
-int32_t kcidxclose(KCIDX* idx);
-
-
-/**
- * Get the code of the last happened error.
- * @param idx a database object.
- * @return the code of the last happened error.
- */
-int32_t kcidxecode(KCIDX* idx);
-
-
-/**
- * Get the supplement message of the last happened error.
- * @param idx a database object.
- * @return the supplement message of the last happened error.
- */
-const char* kcidxemsg(KCIDX* idx);
-
-
-/**
- * Set the value of a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the value is overwritten.
- */
-int32_t kcidxset(KCIDX* idx, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Add a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the record is not modified and false is returned.
- */
-int32_t kcidxadd(KCIDX* idx, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Replace the value of a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, no new record is created and false is returned.
- * If the corresponding record exists, the value is modified.
- */
-int32_t kcidxreplace(KCIDX* idx, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Append the value of a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the given value is appended at the end of the existing value.
- */
-int32_t kcidxappend(KCIDX* idx, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Remove a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, false is returned.
- */
-int32_t kcidxremove(KCIDX* idx, const char* kbuf, size_t ksiz);
-
-
-/**
- * Retrieve the value of a record.
- * @param idx a database object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the corresponding record, or NULL on failure.
- * @note If no record corresponds to the key, NULL is returned. Because an additional zero
- * code is appended at the end of the region of the return value, the return value can be
- * treated as a C-style string. The region of the return value should be released with the
- * kcfree function when it is no longer in use.
- */
-char* kcidxget(KCIDX* idx, const char* kbuf, size_t ksiz, size_t* sp);
-
-
-/**
- * Synchronize updated contents with the file and the device.
- * @param idx a database object.
- * @param hard true for physical synchronization with the device, or false for logical
- * synchronization with the file system.
- * @param proc a postprocessor call back function. If it is NULL, no postprocessing is
- * performed.
- * @param opq an opaque pointer to be given to the call back function.
- * @return true on success, or false on failure.
- * @note The operation of the postprocessor is performed atomically and other threads accessing
- * the same record are blocked. To avoid deadlock, any explicit database operation must not
- * be performed in this function.
- */
-int32_t kcidxsync(KCIDX* idx, int32_t hard, KCFILEPROC proc, void* opq);
-
-
-/**
- * Remove all records.
- * @param idx a database object.
- * @return true on success, or false on failure.
- */
-int32_t kcidxclear(KCIDX* idx);
-
-
-/**
- * Get the number of records.
- * @param idx a database object.
- * @return the number of records, or -1 on failure.
- */
-int64_t kcidxcount(KCIDX* idx);
-
-
-/**
- * Get the size of the database file.
- * @param idx a database object.
- * @return the size of the database file in bytes, or -1 on failure.
- */
-int64_t kcidxsize(KCIDX* idx);
-
-
-/**
- * Get the path of the database file.
- * @param idx a database object.
- * @return the path of the database file, or an empty string on failure.
- * @note The region of the return value should be released with the kcfree function when it is
- * no longer in use.
- */
-char* kcidxpath(KCIDX* idx);
-
-
-/**
- * Get the miscellaneous status information.
- * @param idx a database object.
- * @return the result string of tab saparated values, or NULL on failure. Each line consists of
- * the attribute name and its value separated by a tab character.
- * @note The region of the return value should be released with the kcfree function when it is
- * no longer in use.
- */
-char* kcidxstatus(KCIDX* idx);
-
-
-/**
- * Reveal the inner database object.
- * @return the inner database object, or NULL on failure.
- */
-KCDB* kcidxrevealinnerdb(KCIDX* idx);
-
-
-/**
- * C wrapper of memory-saving string hash map.
- */
-typedef struct {
- void* map; /**< dummy member */
-} KCMAP;
-
-
-/**
- * C wrapper of iterator of memory-saving string hash map.
- */
-typedef struct {
- void* iter; /**< dummy member */
-} KCMAPITER;
-
-
-/**
- * C wrapper of sorter of memory-saving string hash map.
- */
-typedef struct {
- void* iter; /**< dummy member */
-} KCMAPSORT;
-
-
-/**
- * Create a string hash map object.
- * @param bnum the number of buckets of the hash table. If it is not more than 0, the default
- * setting 31 is specified.
- * @return the created map object.
- * @note The object of the return value should be released with the kcmapdel function when it is
- * no longer in use.
- */
-KCMAP* kcmapnew(size_t bnum);
-
-
-/**
- * Destroy a map object.
- * @param map the map object.
- */
-void kcmapdel(KCMAP* map);
-
-
-/**
- * Set the value of a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the value is overwritten.
- */
-void kcmapset(KCMAP* map, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Add a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the record is not modified and false is returned.
- */
-int32_t kcmapadd(KCMAP* map, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Replace the value of a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, no new record is created and false is returned.
- * If the corresponding record exists, the value is modified.
- */
-int32_t kcmapreplace(KCMAP* map, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Append the value of a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param vbuf the pointer to the value region.
- * @param vsiz the size of the value region.
- * @note If no record corresponds to the key, a new record is created. If the corresponding
- * record exists, the given value is appended at the end of the existing value.
- */
-void kcmapappend(KCMAP* map, const char* kbuf, size_t ksiz, const char* vbuf, size_t vsiz);
-
-
-/**
- * Remove a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @return true on success, or false on failure.
- * @note If no record corresponds to the key, false is returned.
- */
-int32_t kcmapremove(KCMAP* map, const char* kbuf, size_t ksiz);
-
-
-/**
- * Retrieve the value of a record.
- * @param map the map object.
- * @param kbuf the pointer to the key region.
- * @param ksiz the size of the key region.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the corresponding record, or NULL on failure.
- */
-const char* kcmapget(KCMAP* map, const char* kbuf, size_t ksiz, size_t* sp);
-
-
-/**
- * Remove all records.
- * @param map the map object.
- */
-void kcmapclear(KCMAP* map);
-
-
-/**
- * Get the number of records.
- * @param map the map object.
- * @return the number of records.
- */
-size_t kcmapcount(KCMAP* map);
-
-
-/**
- * Create a string hash map iterator object.
- * @param map a map object.
- * @return the return value is the created iterator object.
- * @note The object of the return value should be released with the kcmapiterdel function when
- * it is no longer in use.
- * @note This object will not be invalidated even when the map object is updated once.
- * However, phantom records may be retrieved if they are removed after creation of each iterator.
- */
-KCMAPITER* kcmapiterator(KCMAP* map);
-
-
-/**
- * Destroy an iterator object.
- * @param iter the iterator object.
- */
-void kcmapiterdel(KCMAPITER* iter);
-
-
-/**
- * Get the key of the current record.
- * @param iter the iterator object.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the key region of the current record, or NULL on failure.
- */
-const char* kcmapitergetkey(KCMAPITER* iter, size_t* sp);
-
-
-/**
- * Get the value of the current record.
- * @param iter the iterator object.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the current record, or NULL on failure.
- */
-const char* kcmapitergetvalue(KCMAPITER* iter, size_t* sp);
-
-
-/**
- * Get a pair of the key and the value of the current record.
- * @param iter the iterator object.
- * @param ksp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param vbp the pointer to the variable into which the pointer to the value region is
- * assigned.
- * @param vsp the pointer to the variable into which the size of the value region is
- * assigned.
- * @return the pointer to the key region, or NULL on failure.
- */
-const char* kcmapiterget(KCMAPITER* iter, size_t* ksp, const char** vbp, size_t* vsp);
-
-
-/**
- * Step the cursor to the next record.
- * @param iter the iterator object.
- */
-void kcmapiterstep(KCMAPITER* iter);
-
-
-/**
- * Create a string hash map sorter object.
- * @param map a map object.
- * @return the return value is the created sorter object.
- * @note The object of the return value should be released with the kcmapsortdel function when
- * it is no longer in use.
- * @note This object will not be invalidated even when the map object is updated once.
- * However, phantom records may be retrieved if they are removed after creation of each sorter.
- */
-KCMAPSORT* kcmapsorter(KCMAP* map);
-
-
-/**
- * Destroy an sorter object.
- * @param sort the sorter object.
- */
-void kcmapsortdel(KCMAPSORT* sort);
-
-
-/**
- * Get the key of the current record.
- * @param sort the sorter object.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the key region of the current record, or NULL on failure.
- */
-const char* kcmapsortgetkey(KCMAPSORT* sort, size_t* sp);
-
-
-/**
- * Get the value of the current record.
- * @param sort the sorter object.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the value region of the current record, or NULL on failure.
- */
-const char* kcmapsortgetvalue(KCMAPSORT* sort, size_t* sp);
-
-
-/**
- * Get a pair of the key and the value of the current record.
- * @param sort the sorter object.
- * @param ksp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @param vbp the pointer to the variable into which the pointer to the value region is
- * assigned.
- * @param vsp the pointer to the variable into which the size of the value region is
- * assigned.
- * @return the pointer to the key region, or NULL on failure.
- */
-const char* kcmapsortget(KCMAPSORT* sort, size_t* ksp, const char** vbp, size_t* vsp);
-
-
-/**
- * Step the cursor to the next record.
- * @param sort the sorter object.
- */
-void kcmapsortstep(KCMAPSORT* sort);
-
-
-/**
- * C wrapper of memory-saving string hash map.
- */
-typedef struct {
- void* list; /**< dummy member */
-} KCLIST;
-
-
-/**
- * Create a string array list object.
- * @return the created list object.
- * @note The object of the return value should be released with the kclistdel function when it is
- * no longer in use.
- */
-KCLIST* kclistnew();
-
-
-/**
- * Destroy a list object.
- * @param list the list object.
- */
-void kclistdel(KCLIST* list);
-
-
-/**
- * Insert a record at the bottom of the list.
- * @param list the list object.
- * @param buf the pointer to the record region.
- * @param size the size of the record region.
- */
-void kclistpush(KCLIST* list, const char* buf, size_t size);
-
-
-/**
- * Remove a record at the bottom of the list.
- * @param list the list object.
- * @return true if the operation success, or false if there is no record in the list.
- */
-int32_t kclistpop(KCLIST* list);
-
-
-/**
- * Insert a record at the top of the list.
- * @param list the list object.
- * @param buf the pointer to the record region.
- * @param size the size of the record region.
- */
-void kclistunshift(KCLIST* list, const char* buf, size_t size);
-
-
-/**
- * Remove a record at the top of the list.
- * @param list the list object.
- * @return true if the operation success, or false if there is no record in the list.
- */
-int32_t kclistshift(KCLIST* list);
-
-
-/**
- * Insert a record at the position of the given index of the list.
- * @param list the list object.
- * @param buf the pointer to the record region.
- * @param size the size of the record region.
- * @param idx the index of the position. It must be equal to or less than the number of
- * records.
- */
-void kclistinsert(KCLIST* list, const char* buf, size_t size, size_t idx);
-
-
-/**
- * Remove a record at the position of the given index of the list.
- * @param list the list object.
- * @param idx the index of the position. It must be less than the number of records.
- */
-void kclistremove(KCLIST* list, size_t idx);
-
-
-/**
- * Retrieve a record at the position of the given index of the list.
- * @param list the list object.
- * @param idx the index of the position. It must be less than the number of records.
- * @param sp the pointer to the variable into which the size of the region of the return
- * value is assigned.
- * @return the pointer to the region of the retrieved record.
- */
-const char* kclistget(KCLIST* list, size_t idx, size_t* sp);
-
-
-/**
- * Remove all records.
- * @param list the list object.
- */
-void kclistclear(KCLIST* list);
-
-
-/**
- * Get the number of records.
- * @param list the list object.
- * @return the number of records.
- */
-size_t kclistcount(KCLIST* list);
-
-
-#if defined(__cplusplus)
-}
-#endif
-
-#endif /* duplication check */
-
-/* END OF FILE */