thodg/libiconv/lib/converters.h

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  Date : 2018-09-17T18:28:56
  

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• lib/converters.h

• /*
   * Copyright (C) 1999-2002, 2004-2011, 2016 Free Software Foundation, Inc.
   * This file is part of the GNU LIBICONV Library.
   *
   * The GNU LIBICONV Library is free software; you can redistribute it
   * and/or modify it under the terms of the GNU Library General Public
   * License as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * The GNU LIBICONV 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
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library General Public
   * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
   * If not, see <https://www.gnu.org/licenses/>.
   */
  
  /* This file defines all the converters. */
  
  
  /* Our own notion of wide character, as UCS-4, according to ISO-10646-1. */
  typedef unsigned int ucs4_t;
  
  /* State used by a conversion. 0 denotes the initial state. */
  typedef unsigned int state_t;
  
  /* iconv_t is an opaque type. This is the real iconv_t type. */
  typedef struct conv_struct * conv_t;
  
  /*
   * Data type for conversion multibyte -> unicode
   */
  struct mbtowc_funcs {
    int (*xxx_mbtowc) (conv_t conv, ucs4_t *pwc, unsigned char const *s, size_t n);
    /*
     * int xxx_mbtowc (conv_t conv, ucs4_t *pwc, unsigned char const *s, size_t n)
     * converts the byte sequence starting at s to a wide character. Up to n bytes
     * are available at s. n is >= 1.
     * Result is number of bytes consumed (if a wide character was read),
     * or -1 if invalid, or -2 if n too small,
     * or RET_SHIFT_ILSEQ(number of bytes consumed) if invalid input after a shift
     * sequence was read,
     * or RET_TOOFEW(number of bytes consumed) if only a shift sequence was read.
     */
    int (*xxx_flushwc) (conv_t conv, ucs4_t *pwc);
    /*
     * int xxx_flushwc (conv_t conv, ucs4_t *pwc)
     * returns to the initial state and stores the pending wide character, if any.
     * Result is 1 (if a wide character was read) or 0 if none was pending.
     */
  };
  
  /* Return code if invalid input after a shift sequence of n bytes was read.
     (xxx_mbtowc) */
  #define RET_SHIFT_ILSEQ(n)  (-1-2*(n))
  /* Return code if invalid. (xxx_mbtowc) */
  #define RET_ILSEQ           RET_SHIFT_ILSEQ(0)
  /* Return code if only a shift sequence of n bytes was read. (xxx_mbtowc) */
  #define RET_TOOFEW(n)       (-2-2*(n))
  /* Retrieve the n from the encoded RET_... value. */
  #define DECODE_SHIFT_ILSEQ(r)  ((unsigned int)(RET_SHIFT_ILSEQ(0) - (r)) / 2)
  #define DECODE_TOOFEW(r)       ((unsigned int)(RET_TOOFEW(0) - (r)) / 2)
  /* Maximum value of n that may be used as argument to RET_SHIFT_ILSEQ or RET_TOOFEW. */
  #define RET_COUNT_MAX       ((INT_MAX / 2) - 1)
  
  /*
   * Data type for conversion unicode -> multibyte
   */
  struct wctomb_funcs {
    int (*xxx_wctomb) (conv_t conv, unsigned char *r, ucs4_t wc, size_t n);
    /*
     * int xxx_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
     * converts the wide character wc to the character set xxx, and stores the
     * result beginning at r. Up to n bytes may be written at r. n is >= 1.
     * Result is number of bytes written, or -1 if invalid, or -2 if n too small.
     */
    int (*xxx_reset) (conv_t conv, unsigned char *r, size_t n);
    /*
     * int xxx_reset (conv_t conv, unsigned char *r, size_t n)
     * stores a shift sequences returning to the initial state beginning at r.
     * Up to n bytes may be written at r. n is >= 0.
     * Result is number of bytes written, or -2 if n too small.
     */
  };
  
  /* Return code if invalid. (xxx_wctomb) */
  #define RET_ILUNI      -1
  /* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
  #define RET_TOOSMALL   -2
  
  /*
   * Contents of a conversion descriptor.
   */
  struct conv_struct {
    struct loop_funcs lfuncs;
    /* Input (conversion multibyte -> unicode) */
    int iindex;
    struct mbtowc_funcs ifuncs;
    state_t istate;
    /* Output (conversion unicode -> multibyte) */
    int oindex;
    struct wctomb_funcs ofuncs;
    int oflags;
    state_t ostate;
    /* Operation flags */
    int transliterate;
    int discard_ilseq;
    #ifndef LIBICONV_PLUG
    struct iconv_fallbacks fallbacks;
    struct iconv_hooks hooks;
    #endif
  };
  
  /*
   * Include all the converters.
   */
  
  #include "ascii.h"
  
  /* General multi-byte encodings */
  #include "utf8.h"
  #include "ucs2.h"
  #include "ucs2be.h"
  #include "ucs2le.h"
  #include "ucs4.h"
  #include "ucs4be.h"
  #include "ucs4le.h"
  #include "utf16.h"
  #include "utf16be.h"
  #include "utf16le.h"
  #include "utf32.h"
  #include "utf32be.h"
  #include "utf32le.h"
  #include "utf7.h"
  #include "ucs2internal.h"
  #include "ucs2swapped.h"
  #include "ucs4internal.h"
  #include "ucs4swapped.h"
  #include "c99.h"
  #include "java.h"
  
  /* 8-bit encodings */
  #include "iso8859_1.h"
  #include "iso8859_2.h"
  #include "iso8859_3.h"
  #include "iso8859_4.h"
  #include "iso8859_5.h"
  #include "iso8859_6.h"
  #include "iso8859_7.h"
  #include "iso8859_8.h"
  #include "iso8859_9.h"
  #include "iso8859_10.h"
  #include "iso8859_11.h"
  #include "iso8859_13.h"
  #include "iso8859_14.h"
  #include "iso8859_15.h"
  #include "iso8859_16.h"
  #include "koi8_r.h"
  #include "koi8_u.h"
  #include "koi8_ru.h"
  #include "cp1250.h"
  #include "cp1251.h"
  #include "cp1252.h"
  #include "cp1253.h"
  #include "cp1254.h"
  #include "cp1255.h"
  #include "cp1256.h"
  #include "cp1257.h"
  #include "cp1258.h"
  #include "cp850.h"
  #include "cp862.h"
  #include "cp866.h"
  #include "cp1131.h"
  #include "mac_roman.h"
  #include "mac_centraleurope.h"
  #include "mac_iceland.h"
  #include "mac_croatian.h"
  #include "mac_romania.h"
  #include "mac_cyrillic.h"
  #include "mac_ukraine.h"
  #include "mac_greek.h"
  #include "mac_turkish.h"
  #include "mac_hebrew.h"
  #include "mac_arabic.h"
  #include "mac_thai.h"
  #include "hp_roman8.h"
  #include "nextstep.h"
  #include "armscii_8.h"
  #include "georgian_academy.h"
  #include "georgian_ps.h"
  #include "koi8_t.h"
  #include "pt154.h"
  #include "rk1048.h"
  #include "mulelao.h"
  #include "cp1133.h"
  #include "tis620.h"
  #include "cp874.h"
  #include "viscii.h"
  #include "tcvn.h"
  
  /* CJK character sets [CCS = coded character set] [CJKV.INF chapter 3] */
  
  typedef struct {
    unsigned short indx; /* index into big table */
    unsigned short used; /* bitmask of used entries */
  } Summary16;
  
  #include "iso646_jp.h"
  #include "jisx0201.h"
  #include "jisx0208.h"
  #include "jisx0212.h"
  
  #include "iso646_cn.h"
  #include "gb2312.h"
  #include "isoir165.h"
  /*#include "gb12345.h"*/
  #include "gbk.h"
  #include "cns11643.h"
  #include "big5.h"
  
  #include "ksc5601.h"
  #include "johab_hangul.h"
  
  /* CJK encodings [CES = character encoding scheme] [CJKV.INF chapter 4] */
  
  #include "euc_jp.h"
  #include "sjis.h"
  #include "cp932.h"
  #include "iso2022_jp.h"
  #include "iso2022_jp1.h"
  #include "iso2022_jp2.h"
  #include "iso2022_jpms.h"
  
  #include "euc_cn.h"
  #include "ces_gbk.h"
  #include "cp936.h"
  #include "gb18030.h"
  #include "iso2022_cn.h"
  #include "iso2022_cnext.h"
  #include "hz.h"
  #include "euc_tw.h"
  #include "ces_big5.h"
  #include "cp950.h"
  #include "big5hkscs1999.h"
  #include "big5hkscs2001.h"
  #include "big5hkscs2004.h"
  #include "big5hkscs2008.h"
  
  #include "euc_kr.h"
  #include "cp949.h"
  #include "johab.h"
  #include "iso2022_kr.h"
  
  /* Encodings used by system dependent locales. */
  
  #ifdef USE_AIX
  #include "cp856.h"
  #include "cp922.h"
  #include "cp943.h"
  #include "cp1046.h"
  #include "cp1124.h"
  #include "cp1129.h"
  #include "cp1161.h"
  #include "cp1162.h"
  #include "cp1163.h"
  #endif
  
  #ifdef USE_OSF1
  #include "dec_kanji.h"
  #include "dec_hanyu.h"
  #endif
  
  #ifdef USE_DOS
  #include "cp437.h"
  #include "cp737.h"
  #include "cp775.h"
  #include "cp852.h"
  #include "cp853.h"
  #include "cp855.h"
  #include "cp857.h"
  #include "cp858.h"
  #include "cp860.h"
  #include "cp861.h"
  #include "cp863.h"
  #include "cp864.h"
  #include "cp865.h"
  #include "cp869.h"
  #include "cp1125.h"
  #endif
  
  #ifdef USE_EXTRA
  #include "euc_jisx0213.h"
  #include "shift_jisx0213.h"
  #include "iso2022_jp3.h"
  #include "big5_2003.h"
  #include "tds565.h"
  #include "atarist.h"
  #include "riscos1.h"
  #endif
  
  

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