Annotation of embedaddon/libiconv/lib/iconv_open1.h, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 1999-2008 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,
! 18: * Fifth Floor, Boston, MA 02110-1301, USA.
! 19: */
! 20:
! 21: /* Part 1 of iconv_open.
! 22: Input: const char* tocode, const char* fromcode.
! 23: Output:
! 24: unsigned int from_index;
! 25: int from_wchar;
! 26: unsigned int to_index;
! 27: int to_wchar;
! 28: int transliterate;
! 29: int discard_ilseq;
! 30: Jumps to 'invalid' in case of errror.
! 31: */
! 32: {
! 33: char buf[MAX_WORD_LENGTH+10+1];
! 34: const char* cp;
! 35: char* bp;
! 36: const struct alias * ap;
! 37: unsigned int count;
! 38:
! 39: transliterate = 0;
! 40: discard_ilseq = 0;
! 41:
! 42: /* Before calling aliases_lookup, convert the input string to upper case,
! 43: * and check whether it's entirely ASCII (we call gperf with option "-7"
! 44: * to achieve a smaller table) and non-empty. If it's not entirely ASCII,
! 45: * or if it's too long, it is not a valid encoding name.
! 46: */
! 47: for (to_wchar = 0;;) {
! 48: /* Search tocode in the table. */
! 49: for (cp = tocode, bp = buf, count = MAX_WORD_LENGTH+10+1; ; cp++, bp++) {
! 50: unsigned char c = * (unsigned char *) cp;
! 51: if (c >= 0x80)
! 52: goto invalid;
! 53: if (c >= 'a' && c <= 'z')
! 54: c -= 'a'-'A';
! 55: *bp = c;
! 56: if (c == '\0')
! 57: break;
! 58: if (--count == 0)
! 59: goto invalid;
! 60: }
! 61: for (;;) {
! 62: if (bp-buf >= 10 && memcmp(bp-10,"//TRANSLIT",10)==0) {
! 63: bp -= 10;
! 64: *bp = '\0';
! 65: transliterate = 1;
! 66: continue;
! 67: }
! 68: if (bp-buf >= 8 && memcmp(bp-8,"//IGNORE",8)==0) {
! 69: bp -= 8;
! 70: *bp = '\0';
! 71: discard_ilseq = 1;
! 72: continue;
! 73: }
! 74: break;
! 75: }
! 76: if (buf[0] == '\0') {
! 77: tocode = locale_charset();
! 78: /* Avoid an endless loop that could occur when using an older version
! 79: of localcharset.c. */
! 80: if (tocode[0] == '\0')
! 81: goto invalid;
! 82: continue;
! 83: }
! 84: ap = aliases_lookup(buf,bp-buf);
! 85: if (ap == NULL) {
! 86: ap = aliases2_lookup(buf);
! 87: if (ap == NULL)
! 88: goto invalid;
! 89: }
! 90: if (ap->encoding_index == ei_local_char) {
! 91: tocode = locale_charset();
! 92: /* Avoid an endless loop that could occur when using an older version
! 93: of localcharset.c. */
! 94: if (tocode[0] == '\0')
! 95: goto invalid;
! 96: continue;
! 97: }
! 98: if (ap->encoding_index == ei_local_wchar_t) {
! 99: /* On systems which define __STDC_ISO_10646__, wchar_t is Unicode.
! 100: This is also the case on native Woe32 systems. */
! 101: #if __STDC_ISO_10646__ || ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
! 102: if (sizeof(wchar_t) == 4) {
! 103: to_index = ei_ucs4internal;
! 104: break;
! 105: }
! 106: if (sizeof(wchar_t) == 2) {
! 107: to_index = ei_ucs2internal;
! 108: break;
! 109: }
! 110: if (sizeof(wchar_t) == 1) {
! 111: to_index = ei_iso8859_1;
! 112: break;
! 113: }
! 114: #endif
! 115: #if HAVE_MBRTOWC
! 116: to_wchar = 1;
! 117: tocode = locale_charset();
! 118: continue;
! 119: #endif
! 120: goto invalid;
! 121: }
! 122: to_index = ap->encoding_index;
! 123: break;
! 124: }
! 125: for (from_wchar = 0;;) {
! 126: /* Search fromcode in the table. */
! 127: for (cp = fromcode, bp = buf, count = MAX_WORD_LENGTH+10+1; ; cp++, bp++) {
! 128: unsigned char c = * (unsigned char *) cp;
! 129: if (c >= 0x80)
! 130: goto invalid;
! 131: if (c >= 'a' && c <= 'z')
! 132: c -= 'a'-'A';
! 133: *bp = c;
! 134: if (c == '\0')
! 135: break;
! 136: if (--count == 0)
! 137: goto invalid;
! 138: }
! 139: for (;;) {
! 140: if (bp-buf >= 10 && memcmp(bp-10,"//TRANSLIT",10)==0) {
! 141: bp -= 10;
! 142: *bp = '\0';
! 143: continue;
! 144: }
! 145: if (bp-buf >= 8 && memcmp(bp-8,"//IGNORE",8)==0) {
! 146: bp -= 8;
! 147: *bp = '\0';
! 148: continue;
! 149: }
! 150: break;
! 151: }
! 152: if (buf[0] == '\0') {
! 153: fromcode = locale_charset();
! 154: /* Avoid an endless loop that could occur when using an older version
! 155: of localcharset.c. */
! 156: if (fromcode[0] == '\0')
! 157: goto invalid;
! 158: continue;
! 159: }
! 160: ap = aliases_lookup(buf,bp-buf);
! 161: if (ap == NULL) {
! 162: ap = aliases2_lookup(buf);
! 163: if (ap == NULL)
! 164: goto invalid;
! 165: }
! 166: if (ap->encoding_index == ei_local_char) {
! 167: fromcode = locale_charset();
! 168: /* Avoid an endless loop that could occur when using an older version
! 169: of localcharset.c. */
! 170: if (fromcode[0] == '\0')
! 171: goto invalid;
! 172: continue;
! 173: }
! 174: if (ap->encoding_index == ei_local_wchar_t) {
! 175: /* On systems which define __STDC_ISO_10646__, wchar_t is Unicode.
! 176: This is also the case on native Woe32 systems. */
! 177: #if __STDC_ISO_10646__ || ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
! 178: if (sizeof(wchar_t) == 4) {
! 179: from_index = ei_ucs4internal;
! 180: break;
! 181: }
! 182: if (sizeof(wchar_t) == 2) {
! 183: from_index = ei_ucs2internal;
! 184: break;
! 185: }
! 186: if (sizeof(wchar_t) == 1) {
! 187: from_index = ei_iso8859_1;
! 188: break;
! 189: }
! 190: #endif
! 191: #if HAVE_WCRTOMB
! 192: from_wchar = 1;
! 193: fromcode = locale_charset();
! 194: continue;
! 195: #endif
! 196: goto invalid;
! 197: }
! 198: from_index = ap->encoding_index;
! 199: break;
! 200: }
! 201: }
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