kc3-lang/libiconv/lib/iso2022_jp2.h

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• Hash : f017cafc
  Author :
  Date : 2024-10-22T12:28:36
  

  Spelling fixes.
  
  From Mike Taves <mwtoews@gmail.com> in
  <https://lists.gnu.org/archive/html/bug-gnu-libiconv/2024-10/msg00002.html>.
  
  * NOTES: Fix grammar.
  * lib/iconv_open1.h: Fix a typo in comments.
  * lib/iso2022_jp2.h: Likewise.
  * lib/iso2022_jpms.h: Fix English spelling in comments.
  

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• lib/iso2022_jp2.h

• /*
   * Copyright (C) 1999-2001, 2008, 2016, 2024 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 Lesser General Public
   * License as published by the Free Software Foundation; either version 2.1
   * 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
   * If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * ISO-2022-JP-2
   */
  
  /* Specification: RFC 1554 */
  /* ESC '(' 'I' for JISX0201 Katakana is an extension not found in RFC 1554 or
     CJK.INF, but implemented in glibc-2.1 and qt-2.0. */
  
  #define ESC 0x1b
  
  /*
   * The state is composed of one of the following values
   */
  #define STATE_ASCII             0
  #define STATE_JISX0201ROMAN     1
  #define STATE_JISX0201KATAKANA  2
  #define STATE_JISX0208          3
  #define STATE_JISX0212          4
  #define STATE_GB2312            5
  #define STATE_KSC5601           6
  /*
   * and one of the following values, << 8
   */
  #define STATE_G2_NONE           0
  #define STATE_G2_ISO8859_1      1
  #define STATE_G2_ISO8859_7      2
  
  #define SPLIT_STATE \
    unsigned int state1 = state & 0xff, state2 = state >> 8
  #define COMBINE_STATE \
    state = (state2 << 8) | state1
  
  static int
  iso2022_jp2_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  {
    state_t state = conv->istate;
    SPLIT_STATE;
    int count = 0;
    unsigned char c;
    for (;;) {
      c = *s;
      if (c == ESC) {
        if (n < count+3)
          goto none;
        if (s[1] == '(') {
          if (s[2] == 'B') {
            state1 = STATE_ASCII;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          if (s[2] == 'J') {
            state1 = STATE_JISX0201ROMAN;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          if (s[2] == 'I') {
            state1 = STATE_JISX0201KATAKANA;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          goto ilseq;
        }
        if (s[1] == '$') {
          if (s[2] == '@' || s[2] == 'B') {
            /* We don't distinguish JIS X 0208-1978 and JIS X 0208-1983. */
            state1 = STATE_JISX0208;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          if (s[2] == 'A') {
            state1 = STATE_GB2312;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          if (s[2] == '(') {
            if (n < count+4)
              goto none;
            if (s[3] == 'D') {
              state1 = STATE_JISX0212;
              s += 4; count += 4;
              if (n < count+1)
                goto none;
              continue;
            }
            if (s[3] == 'C') {
              state1 = STATE_KSC5601;
              s += 4; count += 4;
              if (n < count+1)
                goto none;
              continue;
            }
            goto ilseq;
          }
          goto ilseq;
        }
        if (s[1] == '.') {
          if (n < count+3)
            goto none;
          if (s[2] == 'A') {
            state2 = STATE_G2_ISO8859_1;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          if (s[2] == 'F') {
            state2 = STATE_G2_ISO8859_7;
            s += 3; count += 3;
            if (n < count+1)
              goto none;
            continue;
          }
          goto ilseq;
        }
        if (s[1] == 'N') {
          switch (state2) {
            case STATE_G2_NONE:
              goto ilseq;
            case STATE_G2_ISO8859_1:
              if (s[2] < 0x80) {
                unsigned char buf = s[2]+0x80;
                int ret = iso8859_1_mbtowc(conv,pwc,&buf,1);
                if (ret == RET_ILSEQ)
                  goto ilseq;
                if (ret != 1) abort();
                COMBINE_STATE;
                conv->istate = state;
                return count+3;
              } else
                goto ilseq;
            case STATE_G2_ISO8859_7:
              if (s[2] < 0x80) {
                unsigned char buf = s[2]+0x80;
                int ret = iso8859_7_mbtowc(conv,pwc,&buf,1);
                if (ret == RET_ILSEQ)
                  goto ilseq;
                if (ret != 1) abort();
                COMBINE_STATE;
                conv->istate = state;
                return count+3;
              } else
                goto ilseq;
            default: abort();
          }
        }
        goto ilseq;
      }
      break;
    }
    switch (state1) {
      case STATE_ASCII:
        if (c < 0x80) {
          int ret = ascii_mbtowc(conv,pwc,s,1);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 1) abort();
          if (*pwc == 0x000a || *pwc == 0x000d)
            state2 = STATE_G2_NONE;
          COMBINE_STATE;
          conv->istate = state;
          return count+1;
        } else
          goto ilseq;
      case STATE_JISX0201ROMAN:
        if (c < 0x80) {
          int ret = jisx0201_mbtowc(conv,pwc,s,1);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 1) abort();
          if (*pwc == 0x000a || *pwc == 0x000d)
            state2 = STATE_G2_NONE;
          COMBINE_STATE;
          conv->istate = state;
          return count+1;
        } else
          goto ilseq;
      case STATE_JISX0201KATAKANA:
        if (c < 0x80) {
          unsigned char buf = c+0x80;
          int ret = jisx0201_mbtowc(conv,pwc,&buf,1);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 1) abort();
          COMBINE_STATE;
          conv->istate = state;
          return count+1;
        } else
          goto ilseq;
      case STATE_JISX0208:
        if (n < count+2)
          goto none;
        if (s[0] < 0x80 && s[1] < 0x80) {
          int ret = jisx0208_mbtowc(conv,pwc,s,2);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 2) abort();
          COMBINE_STATE;
          conv->istate = state;
          return count+2;
        } else
          goto ilseq;
      case STATE_JISX0212:
        if (n < count+2)
          goto none;
        if (s[0] < 0x80 && s[1] < 0x80) {
          int ret = jisx0212_mbtowc(conv,pwc,s,2);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 2) abort();
          COMBINE_STATE;
          conv->istate = state;
          return count+2;
        } else
          goto ilseq;
      case STATE_GB2312:
        if (n < count+2)
          goto none;
        if (s[0] < 0x80 && s[1] < 0x80) {
          int ret = gb2312_mbtowc(conv,pwc,s,2);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 2) abort();
          COMBINE_STATE;
          conv->istate = state;
          return count+2;
        } else
          goto ilseq;
      case STATE_KSC5601:
        if (n < count+2)
          goto none;
        if (s[0] < 0x80 && s[1] < 0x80) {
          int ret = ksc5601_mbtowc(conv,pwc,s,2);
          if (ret == RET_ILSEQ)
            goto ilseq;
          if (ret != 2) abort();
          COMBINE_STATE;
          conv->istate = state;
          return count+2;
        } else
          goto ilseq;
      default: abort();
    }
  
  none:
    COMBINE_STATE;
    conv->istate = state;
    return RET_TOOFEW(count);
  
  ilseq:
    COMBINE_STATE;
    conv->istate = state;
    return RET_SHIFT_ILSEQ(count);
  }
  
  #undef COMBINE_STATE
  #undef SPLIT_STATE
  
  /*
   * The state can also contain one of the following values, << 16.
   * Values >= STATE_TAG_LANGUAGE are temporary tag parsing states.
   */
  #define STATE_TAG_NONE          0
  #define STATE_TAG_LANGUAGE      4
  #define STATE_TAG_LANGUAGE_j    5
  #define STATE_TAG_LANGUAGE_ja   1
  #define STATE_TAG_LANGUAGE_k    6
  #define STATE_TAG_LANGUAGE_ko   2
  #define STATE_TAG_LANGUAGE_z    7
  #define STATE_TAG_LANGUAGE_zh   3
  
  #define SPLIT_STATE \
    unsigned int state1 = state & 0xff, state2 = (state >> 8) & 0xff, state3 = state >> 16
  #define COMBINE_STATE \
    state = (state3 << 16) | (state2 << 8) | state1
  
  static int
  iso2022_jp2_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  {
    state_t state = conv->ostate;
    SPLIT_STATE;
    unsigned char buf[2];
    int ret;
    /* This defines the conversion preferences depending on the current
       language tag. */
    enum conversion { none = 0, european, japanese, chinese, korean, other };
    static const unsigned int conversion_lists[STATE_TAG_LANGUAGE] = {
      /* STATE_TAG_NONE */
      japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
      /* STATE_TAG_LANGUAGE_ja */
      japanese + (european << 3) + (chinese << 6) + (korean << 9) + (other << 12),
      /* STATE_TAG_LANGUAGE_ko */
      korean + (european << 3) + (japanese << 6) + (chinese << 9) + (other << 12),
      /* STATE_TAG_LANGUAGE_zh */
      chinese + (european << 3) + (japanese << 6) + (korean << 9) + (other << 12)
    };
    unsigned int conversion_list;
  
    /* Handle Unicode tag characters (range U+E0000..U+E007F). */
    if ((wc >> 7) == (0xe0000 >> 7)) {
      char c = wc & 0x7f;
      if (c >= 'A' && c <= 'Z')
        c += 'a'-'A';
      switch (c) {
        case 0x01:
          state3 = STATE_TAG_LANGUAGE;
          COMBINE_STATE;
          conv->ostate = state;
          return 0;
        case 'j':
          if (state3 == STATE_TAG_LANGUAGE) {
            state3 = STATE_TAG_LANGUAGE_j;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 'a':
          if (state3 == STATE_TAG_LANGUAGE_j) {
            state3 = STATE_TAG_LANGUAGE_ja;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 'k':
          if (state3 == STATE_TAG_LANGUAGE) {
            state3 = STATE_TAG_LANGUAGE_k;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 'o':
          if (state3 == STATE_TAG_LANGUAGE_k) {
            state3 = STATE_TAG_LANGUAGE_ko;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 'z':
          if (state3 == STATE_TAG_LANGUAGE) {
            state3 = STATE_TAG_LANGUAGE_z;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 'h':
          if (state3 == STATE_TAG_LANGUAGE_z) {
            state3 = STATE_TAG_LANGUAGE_zh;
            COMBINE_STATE;
            conv->ostate = state;
            return 0;
          }
          break;
        case 0x7f:
          state3 = STATE_TAG_NONE;
          COMBINE_STATE;
          conv->ostate = state;
          return 0;
        default:
          break;
      }
      /* Other tag characters reset the tag parsing state or are ignored. */
      if (state3 >= STATE_TAG_LANGUAGE)
        state3 = STATE_TAG_NONE;
      COMBINE_STATE;
      conv->ostate = state;
      return 0;
    }
    if (state3 >= STATE_TAG_LANGUAGE)
      state3 = STATE_TAG_NONE;
  
    /* Try ASCII. */
    ret = ascii_wctomb(conv,buf,wc,1);
    if (ret != RET_ILUNI) {
      if (ret != 1) abort();
      if (buf[0] < 0x80) {
        int count = (state1 == STATE_ASCII ? 1 : 4);
        if (n < count)
          return RET_TOOSMALL;
        if (state1 != STATE_ASCII) {
          r[0] = ESC;
          r[1] = '(';
          r[2] = 'B';
          r += 3;
          state1 = STATE_ASCII;
        }
        r[0] = buf[0];
        if (wc == 0x000a || wc == 0x000d)
          state2 = STATE_G2_NONE;
        COMBINE_STATE;
        conv->ostate = state;
        return count;
      }
    }
  
    conversion_list = conversion_lists[state3];
  
    do {
      switch (conversion_list & ((1 << 3) - 1)) {
  
        case european:
  
          /* Try ISO-8859-1. */
          ret = iso8859_1_wctomb(conv,buf,wc,1);
          if (ret != RET_ILUNI) {
            if (ret != 1) abort();
            if (buf[0] >= 0x80) {
              int count = (state2 == STATE_G2_ISO8859_1 ? 3 : 6);
              if (n < count)
                return RET_TOOSMALL;
              if (state2 != STATE_G2_ISO8859_1) {
                r[0] = ESC;
                r[1] = '.';
                r[2] = 'A';
                r += 3;
                state2 = STATE_G2_ISO8859_1;
              }
              r[0] = ESC;
              r[1] = 'N';
              r[2] = buf[0]-0x80;
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          /* Try ISO-8859-7. */
          ret = iso8859_7_wctomb(conv,buf,wc,1);
          if (ret != RET_ILUNI) {
            if (ret != 1) abort();
            if (buf[0] >= 0x80) {
              int count = (state2 == STATE_G2_ISO8859_7 ? 3 : 6);
              if (n < count)
                return RET_TOOSMALL;
              if (state2 != STATE_G2_ISO8859_7) {
                r[0] = ESC;
                r[1] = '.';
                r[2] = 'F';
                r += 3;
                state2 = STATE_G2_ISO8859_7;
              }
              r[0] = ESC;
              r[1] = 'N';
              r[2] = buf[0]-0x80;
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          break;
  
        case japanese:
  
          /* Try JIS X 0201-1976 Roman. */
          ret = jisx0201_wctomb(conv,buf,wc,1);
          if (ret != RET_ILUNI) {
            if (ret != 1) abort();
            if (buf[0] < 0x80) {
              int count = (state1 == STATE_JISX0201ROMAN ? 1 : 4);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_JISX0201ROMAN) {
                r[0] = ESC;
                r[1] = '(';
                r[2] = 'J';
                r += 3;
                state1 = STATE_JISX0201ROMAN;
              }
              r[0] = buf[0];
              if (wc == 0x000a || wc == 0x000d)
                state2 = STATE_G2_NONE;
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          /* Try JIS X 0208-1990 in place of JIS X 0208-1978 and
             JIS X 0208-1983. */
          ret = jisx0208_wctomb(conv,buf,wc,2);
          if (ret != RET_ILUNI) {
            if (ret != 2) abort();
            if (buf[0] < 0x80 && buf[1] < 0x80) {
              int count = (state1 == STATE_JISX0208 ? 2 : 5);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_JISX0208) {
                r[0] = ESC;
                r[1] = '$';
                r[2] = 'B';
                r += 3;
                state1 = STATE_JISX0208;
              }
              r[0] = buf[0];
              r[1] = buf[1];
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          /* Try JIS X 0212-1990. */
          ret = jisx0212_wctomb(conv,buf,wc,2);
          if (ret != RET_ILUNI) {
            if (ret != 2) abort();
            if (buf[0] < 0x80 && buf[1] < 0x80) {
              int count = (state1 == STATE_JISX0212 ? 2 : 6);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_JISX0212) {
                r[0] = ESC;
                r[1] = '$';
                r[2] = '(';
                r[3] = 'D';
                r += 4;
                state1 = STATE_JISX0212;
              }
              r[0] = buf[0];
              r[1] = buf[1];
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          break;
  
        case chinese:
  
          /* Try GB 2312-1980. */
          ret = gb2312_wctomb(conv,buf,wc,2);
          if (ret != RET_ILUNI) {
            if (ret != 2) abort();
            if (buf[0] < 0x80 && buf[1] < 0x80) {
              int count = (state1 == STATE_GB2312 ? 2 : 5);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_GB2312) {
                r[0] = ESC;
                r[1] = '$';
                r[2] = 'A';
                r += 3;
                state1 = STATE_GB2312;
              }
              r[0] = buf[0];
              r[1] = buf[1];
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          break;
  
        case korean:
  
          /* Try KS C 5601-1992. */
          ret = ksc5601_wctomb(conv,buf,wc,2);
          if (ret != RET_ILUNI) {
            if (ret != 2) abort();
            if (buf[0] < 0x80 && buf[1] < 0x80) {
              int count = (state1 == STATE_KSC5601 ? 2 : 6);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_KSC5601) {
                r[0] = ESC;
                r[1] = '$';
                r[2] = '(';
                r[3] = 'C';
                r += 4;
                state1 = STATE_KSC5601;
              }
              r[0] = buf[0];
              r[1] = buf[1];
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          break;
  
        case other:
  
          /* Try JIS X 0201-1976 Kana. This is not officially part of
             ISO-2022-JP-2, according to RFC 1554. Therefore we try this
             only after all other attempts. */
          ret = jisx0201_wctomb(conv,buf,wc,1);
          if (ret != RET_ILUNI) {
            if (ret != 1) abort();
            if (buf[0] >= 0x80) {
              int count = (state1 == STATE_JISX0201KATAKANA ? 1 : 4);
              if (n < count)
                return RET_TOOSMALL;
              if (state1 != STATE_JISX0201KATAKANA) {
                r[0] = ESC;
                r[1] = '(';
                r[2] = 'I';
                r += 3;
                state1 = STATE_JISX0201KATAKANA;
              }
              r[0] = buf[0]-0x80;
              COMBINE_STATE;
              conv->ostate = state;
              return count;
            }
          }
  
          break;
  
        default:
          abort();
      }
  
      conversion_list = conversion_list >> 3;
    } while (conversion_list != 0);
  
    return RET_ILUNI;
  }
  
  static int
  iso2022_jp2_reset (conv_t conv, unsigned char *r, size_t n)
  {
    state_t state = conv->ostate;
    SPLIT_STATE;
    (void)state2;
    (void)state3;
    if (state1 != STATE_ASCII) {
      if (n < 3)
        return RET_TOOSMALL;
      r[0] = ESC;
      r[1] = '(';
      r[2] = 'B';
      /* conv->ostate = 0; will be done by the caller */
      return 3;
    } else
      return 0;
  }
  
  #undef COMBINE_STATE
  #undef SPLIT_STATE
  #undef STATE_TAG_LANGUAGE_zh
  #undef STATE_TAG_LANGUAGE_z
  #undef STATE_TAG_LANGUAGE_ko
  #undef STATE_TAG_LANGUAGE_k
  #undef STATE_TAG_LANGUAGE_ja
  #undef STATE_TAG_LANGUAGE_j
  #undef STATE_TAG_LANGUAGE
  #undef STATE_TAG_NONE
  #undef STATE_G2_ISO8859_7
  #undef STATE_G2_ISO8859_1
  #undef STATE_G2_NONE
  #undef STATE_KSC5601
  #undef STATE_GB2312
  #undef STATE_JISX0212
  #undef STATE_JISX0208
  #undef STATE_JISX0201KATAKANA
  #undef STATE_JISX0201ROMAN
  #undef STATE_ASCII
  

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