Return to hz.h CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libiconv / lib

Annotation of embedaddon/libiconv/lib/hz.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 1999-2001, 2008 Free Software Foundation, Inc.
        !             3:  * This file is part of the GNU LIBICONV Library.
        !             4:  *
        !             5:  * The GNU LIBICONV Library is free software; you can redistribute it
        !             6:  * and/or modify it under the terms of the GNU Library General Public
        !             7:  * License as published by the Free Software Foundation; either version 2
        !             8:  * of the License, or (at your option) any later version.
        !             9:  *
        !            10:  * The GNU LIBICONV Library is distributed in the hope that it will be
        !            11:  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            12:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            13:  * Library General Public License for more details.
        !            14:  *
        !            15:  * You should have received a copy of the GNU Library General Public
        !            16:  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
        !            17:  * If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * HZ
        !            22:  */
        !            23: 
        !            24: /* Specification: RFC 1842, RFC 1843 */
        !            25: 
        !            26: /*
        !            27:  * The state is 1 in GB mode, 0 in ASCII mode.
        !            28:  */
        !            29: 
        !            30: static int
        !            31: hz_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
        !            32: {
        !            33:   state_t state = conv->istate;
        !            34:   unsigned int count = 0;
        !            35:   unsigned char c;
        !            36:   for (;;) {
        !            37:     c = *s;
        !            38:     if (c == '~') {
        !            39:       if (n < count+2)
        !            40:         goto none;
        !            41:       c = s[1];
        !            42:       if (state == 0) {
        !            43:         if (c == '~') {
        !            44:           *pwc = (ucs4_t) '~';
        !            45:           conv->istate = state;
        !            46:           return count+2;
        !            47:         }
        !            48:         if (c == '{') {
        !            49:           state = 1;
        !            50:           s += 2; count += 2;
        !            51:           if (n < count+1)
        !            52:             goto none;
        !            53:           continue;
        !            54:         }
        !            55:         if (c == '\n') {
        !            56:           s += 2; count += 2;
        !            57:           if (n < count+1)
        !            58:             goto none;
        !            59:           continue;
        !            60:         }
        !            61:       } else {
        !            62:         if (c == '}') {
        !            63:           state = 0;
        !            64:           s += 2; count += 2;
        !            65:           if (n < count+1)
        !            66:             goto none;
        !            67:           continue;
        !            68:         }
        !            69:       }
        !            70:       goto ilseq;
        !            71:     }
        !            72:     break;
        !            73:   }
        !            74:   if (state == 0) {
        !            75:     *pwc = (ucs4_t) c;
        !            76:     conv->istate = state;
        !            77:     return count+1;
        !            78:   } else {
        !            79:     int ret;
        !            80:     if (n < count+2)
        !            81:       goto none;
        !            82:     ret = gb2312_mbtowc(conv,pwc,s,2);
        !            83:     if (ret == RET_ILSEQ)
        !            84:       goto ilseq;
        !            85:     if (ret != 2) abort();
        !            86:     conv->istate = state;
        !            87:     return count+2;
        !            88:   }
        !            89: 
        !            90: none:
        !            91:   conv->istate = state;
        !            92:   return RET_TOOFEW(count);
        !            93: 
        !            94: ilseq:
        !            95:   conv->istate = state;
        !            96:   return RET_SHIFT_ILSEQ(count);
        !            97: }
        !            98: 
        !            99: static int
        !           100: hz_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
        !           101: {
        !           102:   state_t state = conv->ostate;
        !           103:   unsigned char buf[2];
        !           104:   int ret;
        !           105: 
        !           106:   /* Code set 0 (ASCII or GB 1988-89) */
        !           107:   ret = ascii_wctomb(conv,buf,wc,1);
        !           108:   if (ret != RET_ILUNI) {
        !           109:     if (ret != 1) abort();
        !           110:     if (buf[0] < 0x80) {
        !           111:       int count = (state ? 3 : 1);
        !           112:       if (n < count)
        !           113:         return RET_TOOSMALL;
        !           114:       if (state) {
        !           115:         r[0] = '~';
        !           116:         r[1] = '}';
        !           117:         r += 2;
        !           118:         state = 0;
        !           119:       }
        !           120:       r[0] = buf[0];
        !           121:       conv->ostate = state;
        !           122:       return count;
        !           123:     }
        !           124:   }
        !           125: 
        !           126:   /* Code set 1 (GB 2312-1980) */
        !           127:   ret = gb2312_wctomb(conv,buf,wc,2);
        !           128:   if (ret != RET_ILUNI) {
        !           129:     if (ret != 2) abort();
        !           130:     if (buf[0] < 0x80 && buf[1] < 0x80) {
        !           131:       int count = (state ? 2 : 4);
        !           132:       if (n < count)
        !           133:         return RET_TOOSMALL;
        !           134:       if (!state) {
        !           135:         r[0] = '~';
        !           136:         r[1] = '{';
        !           137:         r += 2;
        !           138:         state = 1;
        !           139:       }
        !           140:       r[0] = buf[0];
        !           141:       r[1] = buf[1];
        !           142:       conv->ostate = state;
        !           143:       return count;
        !           144:     }
        !           145:   }
        !           146: 
        !           147:   return RET_ILUNI;
        !           148: }
        !           149: 
        !           150: static int
        !           151: hz_reset (conv_t conv, unsigned char *r, int n)
        !           152: {
        !           153:   state_t state = conv->ostate;
        !           154:   if (state) {
        !           155:     if (n < 2)
        !           156:       return RET_TOOSMALL;
        !           157:     r[0] = '~';
        !           158:     r[1] = '}';
        !           159:     /* conv->ostate = 0; will be done by the caller */
        !           160:     return 2;
        !           161:   } else
        !           162:     return 0;
        !           163: }