+++ /dev/null
-/*
- * Copyright (C) 1999-2001 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, write to the Free Software Foundation, Inc., 59 Temple Place -
- * Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/*
- * ISO-2022-KR
- */
-
-/* Specification: RFC 1557 */
-
-/* Note: CJK.INF says the SO designator needs to appear only once at the
- beginning of a text, but to decrease the risk of ambiguities, when
- producing ISO-2022-KR, we repeat the designator in every line containing
- SO characters. RFC 1557 does not mandate this. */
-
-#define ESC 0x1b
-#define SO 0x0e
-#define SI 0x0f
-
-/*
- * The state is composed of one of the following values
- */
-#define STATE_ASCII 0
-#define STATE_TWOBYTE 1
-/*
- * and one of the following values, << 8
- */
-#define STATE2_NONE 0
-#define STATE2_DESIGNATED_KSC5601 1
-
-#define SPLIT_STATE \
- unsigned int state1 = state & 0xff, state2 = state >> 8
-#define COMBINE_STATE \
- state = (state2 << 8) | state1
-
-static int
-iso2022_kr_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
-{
- state_t state = conv->istate;
- SPLIT_STATE;
- int count = 0;
- unsigned char c;
- for (;;) {
- c = *s;
- if (c == ESC) {
- if (n < count+4)
- goto none;
- if (s[1] == '$') {
- if (s[2] == ')') {
- if (s[3] == 'C') {
- state2 = STATE2_DESIGNATED_KSC5601;
- s += 4; count += 4;
- if (n < count+1)
- goto none;
- continue;
- }
- }
- }
- return RET_ILSEQ;
- }
- if (c == SO) {
- if (state2 != STATE2_DESIGNATED_KSC5601)
- return RET_ILSEQ;
- state1 = STATE_TWOBYTE;
- s++; count++;
- if (n < count+1)
- goto none;
- continue;
- }
- if (c == SI) {
- state1 = STATE_ASCII;
- s++; count++;
- if (n < count+1)
- goto none;
- continue;
- }
- break;
- }
- switch (state1) {
- case STATE_ASCII:
- if (c < 0x80) {
- int ret = ascii_mbtowc(conv,pwc,s,1);
- if (ret == RET_ILSEQ)
- return RET_ILSEQ;
- if (ret != 1) abort();
-#if 0 /* Accept ISO-2022-KR according to CJK.INF. */
- if (*pwc == 0x000a || *pwc == 0x000d)
- state2 = STATE2_NONE;
-#endif
- COMBINE_STATE;
- conv->istate = state;
- return count+1;
- } else
- return RET_ILSEQ;
- case STATE_TWOBYTE:
- if (n < count+2)
- goto none;
- if (state2 != STATE2_DESIGNATED_KSC5601) abort();
- if (s[0] < 0x80 && s[1] < 0x80) {
- int ret = ksc5601_mbtowc(conv,pwc,s,2);
- if (ret == RET_ILSEQ)
- return RET_ILSEQ;
- if (ret != 2) abort();
- COMBINE_STATE;
- conv->istate = state;
- return count+2;
- } else
- return RET_ILSEQ;
- default: abort();
- }
-
-none:
- COMBINE_STATE;
- conv->istate = state;
- return RET_TOOFEW(count);
-}
-
-static int
-iso2022_kr_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
-{
- state_t state = conv->ostate;
- SPLIT_STATE;
- unsigned char buf[2];
- int ret;
-
- /* 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 : 2);
- if (n < count)
- return RET_TOOSMALL;
- if (state1 != STATE_ASCII) {
- r[0] = SI;
- r += 1;
- state1 = STATE_ASCII;
- }
- r[0] = buf[0];
- if (wc == 0x000a || wc == 0x000d)
- state2 = STATE2_NONE;
- COMBINE_STATE;
- conv->ostate = state;
- return count;
- }
- }
-
- /* 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 = (state2 == STATE2_DESIGNATED_KSC5601 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2;
- if (n < count)
- return RET_TOOSMALL;
- if (state2 != STATE2_DESIGNATED_KSC5601) {
- r[0] = ESC;
- r[1] = '$';
- r[2] = ')';
- r[3] = 'C';
- r += 4;
- state2 = STATE2_DESIGNATED_KSC5601;
- }
- if (state1 != STATE_TWOBYTE) {
- r[0] = SO;
- r += 1;
- state1 = STATE_TWOBYTE;
- }
- r[0] = buf[0];
- r[1] = buf[1];
- COMBINE_STATE;
- conv->ostate = state;
- return count;
- }
- }
-
- return RET_ILUNI;
-}
-
-static int
-iso2022_kr_reset (conv_t conv, unsigned char *r, int n)
-{
- state_t state = conv->ostate;
- SPLIT_STATE;
- (void)state2;
- if (state1 != STATE_ASCII) {
- if (n < 1)
- return RET_TOOSMALL;
- r[0] = SI;
- /* conv->ostate = 0; will be done by the caller */
- return 1;
- } else
- return 0;
-}
-
-#undef COMBINE_STATE
-#undef SPLIT_STATE
-#undef STATE2_DESIGNATED_KSC5601
-#undef STATE2_NONE
-#undef STATE_TWOBYTE
-#undef STATE_ASCII
projects / TestXSLT.git / blobdiff