447 lines
11 KiB
C
447 lines
11 KiB
C
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/* Character set conversion.
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Copyright (C) 1999-2001, 2007, 2009-2020 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <iconv.h>
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#include <stddef.h>
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#if REPLACE_ICONV_UTF
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# include <errno.h>
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# include <stdint.h>
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# include <stdlib.h>
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# include "unistr.h"
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#endif
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#if REPLACE_ICONV_UTF
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/* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */
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/* Return code if invalid. (xxx_mbtowc) */
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# define RET_ILSEQ -1
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/* Return code if no bytes were read. (xxx_mbtowc) */
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# define RET_TOOFEW -2
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/* Return code if invalid. (xxx_wctomb) */
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# define RET_ILUNI -1
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/* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
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# define RET_TOOSMALL -2
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/*
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* UTF-16BE
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*/
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/* Specification: RFC 2781 */
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static int
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utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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if (n >= 2)
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{
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ucs4_t wc = (s[0] << 8) + s[1];
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if (wc >= 0xd800 && wc < 0xdc00)
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{
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if (n >= 4)
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{
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ucs4_t wc2 = (s[2] << 8) + s[3];
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if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
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return RET_ILSEQ;
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*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
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return 4;
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}
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}
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else if (wc >= 0xdc00 && wc < 0xe000)
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{
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return RET_ILSEQ;
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}
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else
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{
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*pwc = wc;
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return 2;
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}
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}
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return RET_TOOFEW;
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}
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static int
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utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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{
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if (!(wc >= 0xd800 && wc < 0xe000))
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{
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if (wc < 0x10000)
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{
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if (n >= 2)
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{
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r[0] = (unsigned char) (wc >> 8);
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r[1] = (unsigned char) wc;
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return 2;
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}
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else
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return RET_TOOSMALL;
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}
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else if (wc < 0x110000)
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{
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if (n >= 4)
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{
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ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
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ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
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r[0] = (unsigned char) (wc1 >> 8);
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r[1] = (unsigned char) wc1;
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r[2] = (unsigned char) (wc2 >> 8);
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r[3] = (unsigned char) wc2;
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return 4;
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}
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else
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return RET_TOOSMALL;
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}
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}
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return RET_ILUNI;
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}
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/*
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* UTF-16LE
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*/
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/* Specification: RFC 2781 */
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static int
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utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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if (n >= 2)
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{
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ucs4_t wc = s[0] + (s[1] << 8);
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if (wc >= 0xd800 && wc < 0xdc00)
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{
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if (n >= 4)
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{
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ucs4_t wc2 = s[2] + (s[3] << 8);
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if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
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return RET_ILSEQ;
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*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
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return 4;
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}
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}
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else if (wc >= 0xdc00 && wc < 0xe000)
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{
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return RET_ILSEQ;
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}
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else
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{
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*pwc = wc;
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return 2;
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}
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}
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return RET_TOOFEW;
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}
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static int
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utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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{
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if (!(wc >= 0xd800 && wc < 0xe000))
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{
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if (wc < 0x10000)
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{
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if (n >= 2)
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{
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r[0] = (unsigned char) wc;
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r[1] = (unsigned char) (wc >> 8);
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return 2;
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}
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else
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return RET_TOOSMALL;
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}
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else if (wc < 0x110000)
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{
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if (n >= 4)
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{
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ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
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ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
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r[0] = (unsigned char) wc1;
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r[1] = (unsigned char) (wc1 >> 8);
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r[2] = (unsigned char) wc2;
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r[3] = (unsigned char) (wc2 >> 8);
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return 4;
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}
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else
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return RET_TOOSMALL;
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}
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}
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return RET_ILUNI;
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}
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/*
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* UTF-32BE
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*/
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/* Specification: Unicode 3.1 Standard Annex #19 */
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static int
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utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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if (n >= 4)
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{
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ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3];
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if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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{
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*pwc = wc;
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return 4;
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}
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else
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return RET_ILSEQ;
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}
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return RET_TOOFEW;
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}
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static int
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utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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{
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if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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{
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if (n >= 4)
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{
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r[0] = 0;
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r[1] = (unsigned char) (wc >> 16);
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r[2] = (unsigned char) (wc >> 8);
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r[3] = (unsigned char) wc;
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return 4;
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}
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else
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return RET_TOOSMALL;
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}
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return RET_ILUNI;
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}
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/*
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* UTF-32LE
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*/
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/* Specification: Unicode 3.1 Standard Annex #19 */
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static int
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utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
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{
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if (n >= 4)
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{
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ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24);
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if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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{
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*pwc = wc;
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return 4;
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}
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else
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return RET_ILSEQ;
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}
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return RET_TOOFEW;
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}
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static int
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utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
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{
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if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
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{
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if (n >= 4)
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{
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r[0] = (unsigned char) wc;
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r[1] = (unsigned char) (wc >> 8);
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r[2] = (unsigned char) (wc >> 16);
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r[3] = 0;
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return 4;
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}
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else
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return RET_TOOSMALL;
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}
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return RET_ILUNI;
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}
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#endif
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size_t
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rpl_iconv (iconv_t cd,
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ICONV_CONST char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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#undef iconv
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{
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#if REPLACE_ICONV_UTF
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switch ((uintptr_t) cd)
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{
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{
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int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t);
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case (uintptr_t) _ICONV_UTF8_UTF16BE:
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xxx_wctomb = utf16be_wctomb;
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goto loop_from_utf8;
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case (uintptr_t) _ICONV_UTF8_UTF16LE:
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xxx_wctomb = utf16le_wctomb;
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goto loop_from_utf8;
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case (uintptr_t) _ICONV_UTF8_UTF32BE:
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xxx_wctomb = utf32be_wctomb;
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goto loop_from_utf8;
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case (uintptr_t) _ICONV_UTF8_UTF32LE:
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xxx_wctomb = utf32le_wctomb;
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goto loop_from_utf8;
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loop_from_utf8:
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if (inbuf == NULL || *inbuf == NULL)
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return 0;
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{
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ICONV_CONST char *inptr = *inbuf;
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size_t inleft = *inbytesleft;
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char *outptr = *outbuf;
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size_t outleft = *outbytesleft;
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size_t res = 0;
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while (inleft > 0)
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{
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ucs4_t uc;
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int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft);
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if (m <= 0)
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{
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if (m == -1)
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{
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errno = EILSEQ;
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res = (size_t)(-1);
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break;
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}
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if (m == -2)
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{
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errno = EINVAL;
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res = (size_t)(-1);
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break;
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}
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abort ();
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}
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else
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{
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int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft);
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if (n < 0)
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{
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if (n == RET_ILUNI)
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{
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errno = EILSEQ;
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res = (size_t)(-1);
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break;
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}
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if (n == RET_TOOSMALL)
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{
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errno = E2BIG;
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res = (size_t)(-1);
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break;
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}
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abort ();
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}
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else
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{
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inptr += m;
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inleft -= m;
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outptr += n;
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outleft -= n;
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}
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}
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}
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*inbuf = inptr;
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*inbytesleft = inleft;
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*outbuf = outptr;
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*outbytesleft = outleft;
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return res;
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}
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}
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{
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int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t);
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case (uintptr_t) _ICONV_UTF16BE_UTF8:
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xxx_mbtowc = utf16be_mbtowc;
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goto loop_to_utf8;
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case (uintptr_t) _ICONV_UTF16LE_UTF8:
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xxx_mbtowc = utf16le_mbtowc;
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goto loop_to_utf8;
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case (uintptr_t) _ICONV_UTF32BE_UTF8:
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xxx_mbtowc = utf32be_mbtowc;
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goto loop_to_utf8;
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case (uintptr_t) _ICONV_UTF32LE_UTF8:
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xxx_mbtowc = utf32le_mbtowc;
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goto loop_to_utf8;
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loop_to_utf8:
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if (inbuf == NULL || *inbuf == NULL)
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return 0;
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{
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ICONV_CONST char *inptr = *inbuf;
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size_t inleft = *inbytesleft;
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char *outptr = *outbuf;
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size_t outleft = *outbytesleft;
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size_t res = 0;
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while (inleft > 0)
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{
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ucs4_t uc;
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int m = xxx_mbtowc (&uc, (const uint8_t *) inptr, inleft);
|
||
|
|
if (m <= 0)
|
||
|
|
{
|
||
|
|
if (m == RET_ILSEQ)
|
||
|
|
{
|
||
|
|
errno = EILSEQ;
|
||
|
|
res = (size_t)(-1);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (m == RET_TOOFEW)
|
||
|
|
{
|
||
|
|
errno = EINVAL;
|
||
|
|
res = (size_t)(-1);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
abort ();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int n = u8_uctomb ((uint8_t *) outptr, uc, outleft);
|
||
|
|
if (n < 0)
|
||
|
|
{
|
||
|
|
if (n == -1)
|
||
|
|
{
|
||
|
|
errno = EILSEQ;
|
||
|
|
res = (size_t)(-1);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (n == -2)
|
||
|
|
{
|
||
|
|
errno = E2BIG;
|
||
|
|
res = (size_t)(-1);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
abort ();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
inptr += m;
|
||
|
|
inleft -= m;
|
||
|
|
outptr += n;
|
||
|
|
outleft -= n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*inbuf = inptr;
|
||
|
|
*inbytesleft = inleft;
|
||
|
|
*outbuf = outptr;
|
||
|
|
*outbytesleft = outleft;
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
return iconv (cd, inbuf, inbytesleft, outbuf, outbytesleft);
|
||
|
|
}
|