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unac.h

/*
 * Copyright (C) 2000, 2001, 2002, 2003 Loic Dachary <loic@senga.org>
 *
 * 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.
 */

/*
 * Provides functions to strip accents from a string in all the
 * charset supported by iconv(3).
 *
 * See the unac(3) manual page for more information.
 *
 */

#ifndef _unac_h
#define _unac_h

#ifdef __cplusplus
extern "C" {
#endif

/* Generated by builder. Do not modify. Start defines */
#define UNAC_BLOCK_SHIFT 5
#define UNAC_BLOCK_MASK ((1 << UNAC_BLOCK_SHIFT) - 1)
#define UNAC_BLOCK_SIZE (1 << UNAC_BLOCK_SHIFT)
#define UNAC_BLOCK_COUNT 214
#define UNAC_INDEXES_SIZE (0x10000 >> UNAC_BLOCK_SHIFT)
/* Generated by builder. Do not modify. End defines */

/*
 * Return the unaccented equivalent of the UTF-16 character <c>
 * in the pointer <p>. The length of the unsigned short array pointed
 * by <p> is returned in the <l> argument.
 * The C++ prototype of this macro would be:
 *
 * void unac_char(const unsigned short c, unsigned short*& p, int& l)
 *
 * See unac(3) in IMPLEMENTATION NOTES for more information about the
 * tables (unac_data_table, unac_positions) layout.
 */ 
#define unac_char_utf16(c,p,l) \
  { \
    unsigned short index = unac_indexes[(c) >> UNAC_BLOCK_SHIFT]; \
    unsigned char position = (c) & UNAC_BLOCK_MASK; \
    (p) = &(unac_data_table[index][unac_positions[index][position]]); \
    (l) = unac_positions[index][position + 1] - unac_positions[index][position]; \
    if((l) == 1 && *(p) == 0xFFFF) { \
      (p) = 0; \
      (l) = 0; \
    } \
  }

/*
 * Return the unaccented equivalent of the UTF-16 string <in> of
 * length <in_length> in the pointer <out>. The length of the UTF-16
 * string returned in <out> is stored in <out_length>. If the pointer
 * *out is null, a new string is allocated using malloc(3). If the
 * pointer *out is not null, the available length must also be given
 * in the *out_length argument.  The pointer passed to *out must have
 * been allocated by malloc(3) and may be reallocated by realloc(3) if
 * needs be. It is the responsibility of the caller to free the
 * pointer returned in *out.  The return value is 0 on success and -1
 * on error, in which case the errno variable is set to the
 * corresponding error code.
 */
int unac_string_utf16(const char* in, size_t in_length,
            char** out, size_t* out_length);

/*
 * The semantic of this function is stricly equal to the function
 * unac_string_utf16. The <charset> argument relates to the content of
 * the input string (<in>). The <in_length> argument is the size of
 * the <in> buffer, in bytes. It is converted to UTF-16 using iconv(3)
 * before calling the unac_string_utf16 function and the result is
 * converted from UTF-16 to the specified <charset> before returning
 * it in the <out> pointer. If *<out> is null, a buffer is created
 * using malloc(3), otherwise it is assumed to point to a buffer with
 * at least *<out_length> bytes. The return value is 0 on success and
 * -1 on error, in which case the errno variable is set to the
 * corresponding error code.
 */
int unac_string(const char* charset,
            const char* in, size_t in_length,
            char** out, size_t* out_length);

/*
 * Return the unac version number, as a string.
 */
const char* unac_version(void);

#define UNAC_DEBUG_NONE 0x00
#define UNAC_DEBUG_LOW  0x01
#define UNAC_DEBUG_HIGH 0x02

#ifdef HAVE_VSNPRINTF
#define UNAC_DEBUG_AVAILABLE 1
/*
 * Set the unac debug level. <l> is one of:
 * UNAC_DEBUG_NONE for no debug messages at all
 * UNAC_DEBUG_LOW for minimal information
 * UNAC_DEBUG_HIGH for extremely verbose information,
 *                 only usable when translating a few short strings.
 *
 * unac_debug with anything but UNAC_DEBUG_NONE is not
 * thread safe.
 */
#define unac_debug(l) unac_debug_callback((l), 0, (void*)0);

/*
 * Set the debug level and define a printing function callback.
 * The <level> debug level is the same as in unac_debug. The
 * <function> is in charge of dealing with the debug messages,
 * presumably to print them to the user. The <data> is an opaque
 * pointer that is passed along to <function>, should it
 * need to manage a persistent context.
 *
 * The prototype of <function> allows two arguments. The first
 * is the debug message (const char*), the second is the opaque
 * pointer given as <data> argument to unac_debug_callback.
 *
 * If <function> is NULL, messages are printed on the standard
 * error output using fprintf(stderr...).
 * 
 * unac_debug_callback with anything but UNAC_DEBUG_NONE is not
 * thread safe.
 *
 */
typedef void (*unac_debug_print_t)(const char* message, void* data);
void unac_debug_callback(int level, unac_debug_print_t function, void* data);
#endif /* HAVE_VSNPRINTF */

/* Generated by builder. Do not modify. Start declarations */
extern unsigned short unac_indexes[UNAC_INDEXES_SIZE];
extern unsigned char unac_positions[UNAC_BLOCK_COUNT][UNAC_BLOCK_SIZE + 1];
extern unsigned short* unac_data_table[UNAC_BLOCK_COUNT];
extern unsigned short unac_data0[];
extern unsigned short unac_data1[];
extern unsigned short unac_data2[];
extern unsigned short unac_data3[];
extern unsigned short unac_data4[];
extern unsigned short unac_data5[];
extern unsigned short unac_data6[];
extern unsigned short unac_data7[];
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/* Generated by builder. Do not modify. End declarations */

#ifdef __cplusplus
}
#endif

#endif /* _unac_h */

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