forked from mia/Aegisub
527 lines
17 KiB
C
527 lines
17 KiB
C
/*
|
|
* Copyright (C) 1999-2003, 2005-2006, 2008 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., 51 Franklin Street,
|
|
* Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/* This file defines the conversion loop via Unicode as a pivot encoding. */
|
|
|
|
/* Attempt to transliterate wc. Return code as in xxx_wctomb. */
|
|
static int unicode_transliterate (conv_t cd, ucs4_t wc,
|
|
unsigned char* outptr, size_t outleft)
|
|
{
|
|
if (cd->oflags & HAVE_HANGUL_JAMO) {
|
|
/* Decompose Hangul into Jamo. Use double-width Jamo (contained
|
|
in all Korean encodings and ISO-2022-JP-2), not half-width Jamo
|
|
(contained in Unicode only). */
|
|
ucs4_t buf[3];
|
|
int ret = johab_hangul_decompose(cd,buf,wc);
|
|
if (ret != RET_ILUNI) {
|
|
/* we know 1 <= ret <= 3 */
|
|
state_t backup_state = cd->ostate;
|
|
unsigned char* backup_outptr = outptr;
|
|
size_t backup_outleft = outleft;
|
|
int i, sub_outcount;
|
|
for (i = 0; i < ret; i++) {
|
|
if (outleft == 0) {
|
|
sub_outcount = RET_TOOSMALL;
|
|
goto johab_hangul_failed;
|
|
}
|
|
sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,buf[i],outleft);
|
|
if (sub_outcount <= RET_ILUNI)
|
|
goto johab_hangul_failed;
|
|
if (!(sub_outcount <= outleft)) abort();
|
|
outptr += sub_outcount; outleft -= sub_outcount;
|
|
}
|
|
return outptr-backup_outptr;
|
|
johab_hangul_failed:
|
|
cd->ostate = backup_state;
|
|
outptr = backup_outptr;
|
|
outleft = backup_outleft;
|
|
if (sub_outcount != RET_ILUNI)
|
|
return RET_TOOSMALL;
|
|
}
|
|
}
|
|
{
|
|
/* Try to use a variant, but postfix it with
|
|
U+303E IDEOGRAPHIC VARIATION INDICATOR
|
|
(cf. Ken Lunde's "CJKV information processing", p. 188). */
|
|
int indx = -1;
|
|
if (wc == 0x3006)
|
|
indx = 0;
|
|
else if (wc == 0x30f6)
|
|
indx = 1;
|
|
else if (wc >= 0x4e00 && wc < 0xa000)
|
|
indx = cjk_variants_indx[wc-0x4e00];
|
|
if (indx >= 0) {
|
|
for (;; indx++) {
|
|
ucs4_t buf[2];
|
|
unsigned short variant = cjk_variants[indx];
|
|
unsigned short last = variant & 0x8000;
|
|
variant &= 0x7fff;
|
|
variant += 0x3000;
|
|
buf[0] = variant; buf[1] = 0x303e;
|
|
{
|
|
state_t backup_state = cd->ostate;
|
|
unsigned char* backup_outptr = outptr;
|
|
size_t backup_outleft = outleft;
|
|
int i, sub_outcount;
|
|
for (i = 0; i < 2; i++) {
|
|
if (outleft == 0) {
|
|
sub_outcount = RET_TOOSMALL;
|
|
goto variant_failed;
|
|
}
|
|
sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,buf[i],outleft);
|
|
if (sub_outcount <= RET_ILUNI)
|
|
goto variant_failed;
|
|
if (!(sub_outcount <= outleft)) abort();
|
|
outptr += sub_outcount; outleft -= sub_outcount;
|
|
}
|
|
return outptr-backup_outptr;
|
|
variant_failed:
|
|
cd->ostate = backup_state;
|
|
outptr = backup_outptr;
|
|
outleft = backup_outleft;
|
|
if (sub_outcount != RET_ILUNI)
|
|
return RET_TOOSMALL;
|
|
}
|
|
if (last)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (wc >= 0x2018 && wc <= 0x201a) {
|
|
/* Special case for quotation marks 0x2018, 0x2019, 0x201a */
|
|
ucs4_t substitute =
|
|
(cd->oflags & HAVE_QUOTATION_MARKS
|
|
? (wc == 0x201a ? 0x2018 : wc)
|
|
: (cd->oflags & HAVE_ACCENTS
|
|
? (wc==0x2019 ? 0x00b4 : 0x0060) /* use accents */
|
|
: 0x0027 /* use apostrophe */
|
|
) );
|
|
int outcount = cd->ofuncs.xxx_wctomb(cd,outptr,substitute,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
return outcount;
|
|
}
|
|
{
|
|
/* Use the transliteration table. */
|
|
int indx = translit_index(wc);
|
|
if (indx >= 0) {
|
|
const unsigned int * cp = &translit_data[indx];
|
|
unsigned int num = *cp++;
|
|
state_t backup_state = cd->ostate;
|
|
unsigned char* backup_outptr = outptr;
|
|
size_t backup_outleft = outleft;
|
|
unsigned int i;
|
|
int sub_outcount;
|
|
for (i = 0; i < num; i++) {
|
|
if (outleft == 0) {
|
|
sub_outcount = RET_TOOSMALL;
|
|
goto translit_failed;
|
|
}
|
|
sub_outcount = cd->ofuncs.xxx_wctomb(cd,outptr,cp[i],outleft);
|
|
if (sub_outcount == RET_ILUNI)
|
|
/* Recursive transliteration. */
|
|
sub_outcount = unicode_transliterate(cd,cp[i],outptr,outleft);
|
|
if (sub_outcount <= RET_ILUNI)
|
|
goto translit_failed;
|
|
if (!(sub_outcount <= outleft)) abort();
|
|
outptr += sub_outcount; outleft -= sub_outcount;
|
|
}
|
|
return outptr-backup_outptr;
|
|
translit_failed:
|
|
cd->ostate = backup_state;
|
|
outptr = backup_outptr;
|
|
outleft = backup_outleft;
|
|
if (sub_outcount != RET_ILUNI)
|
|
return RET_TOOSMALL;
|
|
}
|
|
}
|
|
return RET_ILUNI;
|
|
}
|
|
|
|
#ifndef LIBICONV_PLUG
|
|
|
|
struct uc_to_mb_fallback_locals {
|
|
unsigned char* l_outbuf;
|
|
size_t l_outbytesleft;
|
|
int l_errno;
|
|
};
|
|
|
|
static void uc_to_mb_write_replacement (const char *buf, size_t buflen,
|
|
void* callback_arg)
|
|
{
|
|
struct uc_to_mb_fallback_locals * plocals =
|
|
(struct uc_to_mb_fallback_locals *) callback_arg;
|
|
/* Do nothing if already encountered an error in a previous call. */
|
|
if (plocals->l_errno == 0) {
|
|
/* Attempt to copy the passed buffer to the output buffer. */
|
|
if (plocals->l_outbytesleft < buflen)
|
|
plocals->l_errno = E2BIG;
|
|
else {
|
|
memcpy(plocals->l_outbuf, buf, buflen);
|
|
plocals->l_outbuf += buflen;
|
|
plocals->l_outbytesleft -= buflen;
|
|
}
|
|
}
|
|
}
|
|
|
|
struct mb_to_uc_fallback_locals {
|
|
conv_t l_cd;
|
|
unsigned char* l_outbuf;
|
|
size_t l_outbytesleft;
|
|
int l_errno;
|
|
};
|
|
|
|
static void mb_to_uc_write_replacement (const unsigned int *buf, size_t buflen,
|
|
void* callback_arg)
|
|
{
|
|
struct mb_to_uc_fallback_locals * plocals =
|
|
(struct mb_to_uc_fallback_locals *) callback_arg;
|
|
/* Do nothing if already encountered an error in a previous call. */
|
|
if (plocals->l_errno == 0) {
|
|
/* Attempt to convert the passed buffer to the target encoding. */
|
|
conv_t cd = plocals->l_cd;
|
|
unsigned char* outptr = plocals->l_outbuf;
|
|
size_t outleft = plocals->l_outbytesleft;
|
|
for (; buflen > 0; buf++, buflen--) {
|
|
ucs4_t wc = *buf;
|
|
int outcount;
|
|
if (outleft == 0) {
|
|
plocals->l_errno = E2BIG;
|
|
break;
|
|
}
|
|
outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
/* Handle Unicode tag characters (range U+E0000..U+E007F). */
|
|
if ((wc >> 7) == (0xe0000 >> 7))
|
|
goto outcount_zero;
|
|
/* Try transliteration. */
|
|
if (cd->transliterate) {
|
|
outcount = unicode_transliterate(cd,wc,outptr,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
}
|
|
if (cd->discard_ilseq) {
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
else if (cd->fallbacks.uc_to_mb_fallback != NULL) {
|
|
struct uc_to_mb_fallback_locals locals;
|
|
locals.l_outbuf = outptr;
|
|
locals.l_outbytesleft = outleft;
|
|
locals.l_errno = 0;
|
|
cd->fallbacks.uc_to_mb_fallback(wc,
|
|
uc_to_mb_write_replacement,
|
|
&locals,
|
|
cd->fallbacks.data);
|
|
if (locals.l_errno != 0) {
|
|
plocals->l_errno = locals.l_errno;
|
|
break;
|
|
}
|
|
outptr = locals.l_outbuf;
|
|
outleft = locals.l_outbytesleft;
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#endif
|
|
outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
plocals->l_errno = EILSEQ;
|
|
break;
|
|
outcount_ok:
|
|
if (outcount < 0) {
|
|
plocals->l_errno = E2BIG;
|
|
break;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
if (cd->hooks.uc_hook)
|
|
(*cd->hooks.uc_hook)(wc, cd->hooks.data);
|
|
#endif
|
|
if (!(outcount <= outleft)) abort();
|
|
outptr += outcount; outleft -= outcount;
|
|
outcount_zero: ;
|
|
}
|
|
plocals->l_outbuf = outptr;
|
|
plocals->l_outbytesleft = outleft;
|
|
}
|
|
}
|
|
|
|
#endif /* !LIBICONV_PLUG */
|
|
|
|
static size_t unicode_loop_convert (iconv_t icd,
|
|
const char* * inbuf, size_t *inbytesleft,
|
|
char* * outbuf, size_t *outbytesleft)
|
|
{
|
|
conv_t cd = (conv_t) icd;
|
|
size_t result = 0;
|
|
const unsigned char* inptr = (const unsigned char*) *inbuf;
|
|
size_t inleft = *inbytesleft;
|
|
unsigned char* outptr = (unsigned char*) *outbuf;
|
|
size_t outleft = *outbytesleft;
|
|
while (inleft > 0) {
|
|
state_t last_istate = cd->istate;
|
|
ucs4_t wc;
|
|
int incount;
|
|
int outcount;
|
|
incount = cd->ifuncs.xxx_mbtowc(cd,&wc,inptr,inleft);
|
|
if (incount < 0) {
|
|
if ((unsigned int)(-1-incount) % 2 == (unsigned int)(-1-RET_ILSEQ) % 2) {
|
|
/* Case 1: invalid input, possibly after a shift sequence */
|
|
incount = DECODE_SHIFT_ILSEQ(incount);
|
|
if (cd->discard_ilseq) {
|
|
switch (cd->iindex) {
|
|
case ei_ucs4: case ei_ucs4be: case ei_ucs4le:
|
|
case ei_utf32: case ei_utf32be: case ei_utf32le:
|
|
case ei_ucs4internal: case ei_ucs4swapped:
|
|
incount += 4; break;
|
|
case ei_ucs2: case ei_ucs2be: case ei_ucs2le:
|
|
case ei_utf16: case ei_utf16be: case ei_utf16le:
|
|
case ei_ucs2internal: case ei_ucs2swapped:
|
|
incount += 2; break;
|
|
default:
|
|
incount += 1; break;
|
|
}
|
|
goto outcount_zero;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
else if (cd->fallbacks.mb_to_uc_fallback != NULL) {
|
|
unsigned int incount2;
|
|
struct mb_to_uc_fallback_locals locals;
|
|
switch (cd->iindex) {
|
|
case ei_ucs4: case ei_ucs4be: case ei_ucs4le:
|
|
case ei_utf32: case ei_utf32be: case ei_utf32le:
|
|
case ei_ucs4internal: case ei_ucs4swapped:
|
|
incount2 = 4; break;
|
|
case ei_ucs2: case ei_ucs2be: case ei_ucs2le:
|
|
case ei_utf16: case ei_utf16be: case ei_utf16le:
|
|
case ei_ucs2internal: case ei_ucs2swapped:
|
|
incount2 = 2; break;
|
|
default:
|
|
incount2 = 1; break;
|
|
}
|
|
locals.l_cd = cd;
|
|
locals.l_outbuf = outptr;
|
|
locals.l_outbytesleft = outleft;
|
|
locals.l_errno = 0;
|
|
cd->fallbacks.mb_to_uc_fallback((const char*)inptr+incount, incount2,
|
|
mb_to_uc_write_replacement,
|
|
&locals,
|
|
cd->fallbacks.data);
|
|
if (locals.l_errno != 0) {
|
|
inptr += incount; inleft -= incount;
|
|
errno = locals.l_errno;
|
|
result = -1;
|
|
break;
|
|
}
|
|
incount += incount2;
|
|
outptr = locals.l_outbuf;
|
|
outleft = locals.l_outbytesleft;
|
|
result += 1;
|
|
goto outcount_zero;
|
|
}
|
|
#endif
|
|
inptr += incount; inleft -= incount;
|
|
errno = EILSEQ;
|
|
result = -1;
|
|
break;
|
|
}
|
|
if (incount == RET_TOOFEW(0)) {
|
|
/* Case 2: not enough bytes available to detect anything */
|
|
errno = EINVAL;
|
|
result = -1;
|
|
break;
|
|
}
|
|
/* Case 3: k bytes read, but only a shift sequence */
|
|
incount = DECODE_TOOFEW(incount);
|
|
} else {
|
|
/* Case 4: k bytes read, making up a wide character */
|
|
if (outleft == 0) {
|
|
cd->istate = last_istate;
|
|
errno = E2BIG;
|
|
result = -1;
|
|
break;
|
|
}
|
|
outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
/* Handle Unicode tag characters (range U+E0000..U+E007F). */
|
|
if ((wc >> 7) == (0xe0000 >> 7))
|
|
goto outcount_zero;
|
|
/* Try transliteration. */
|
|
result++;
|
|
if (cd->transliterate) {
|
|
outcount = unicode_transliterate(cd,wc,outptr,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
}
|
|
if (cd->discard_ilseq) {
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
else if (cd->fallbacks.uc_to_mb_fallback != NULL) {
|
|
struct uc_to_mb_fallback_locals locals;
|
|
locals.l_outbuf = outptr;
|
|
locals.l_outbytesleft = outleft;
|
|
locals.l_errno = 0;
|
|
cd->fallbacks.uc_to_mb_fallback(wc,
|
|
uc_to_mb_write_replacement,
|
|
&locals,
|
|
cd->fallbacks.data);
|
|
if (locals.l_errno != 0) {
|
|
cd->istate = last_istate;
|
|
errno = locals.l_errno;
|
|
return -1;
|
|
}
|
|
outptr = locals.l_outbuf;
|
|
outleft = locals.l_outbytesleft;
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#endif
|
|
outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
cd->istate = last_istate;
|
|
errno = EILSEQ;
|
|
result = -1;
|
|
break;
|
|
outcount_ok:
|
|
if (outcount < 0) {
|
|
cd->istate = last_istate;
|
|
errno = E2BIG;
|
|
result = -1;
|
|
break;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
if (cd->hooks.uc_hook)
|
|
(*cd->hooks.uc_hook)(wc, cd->hooks.data);
|
|
#endif
|
|
if (!(outcount <= outleft)) abort();
|
|
outptr += outcount; outleft -= outcount;
|
|
}
|
|
outcount_zero:
|
|
if (!(incount <= inleft)) abort();
|
|
inptr += incount; inleft -= incount;
|
|
}
|
|
*inbuf = (const char*) inptr;
|
|
*inbytesleft = inleft;
|
|
*outbuf = (char*) outptr;
|
|
*outbytesleft = outleft;
|
|
return result;
|
|
}
|
|
|
|
static size_t unicode_loop_reset (iconv_t icd,
|
|
char* * outbuf, size_t *outbytesleft)
|
|
{
|
|
conv_t cd = (conv_t) icd;
|
|
if (outbuf == NULL || *outbuf == NULL) {
|
|
/* Reset the states. */
|
|
memset(&cd->istate,'\0',sizeof(state_t));
|
|
memset(&cd->ostate,'\0',sizeof(state_t));
|
|
return 0;
|
|
} else {
|
|
size_t result = 0;
|
|
if (cd->ifuncs.xxx_flushwc) {
|
|
state_t last_istate = cd->istate;
|
|
ucs4_t wc;
|
|
if (cd->ifuncs.xxx_flushwc(cd, &wc)) {
|
|
unsigned char* outptr = (unsigned char*) *outbuf;
|
|
size_t outleft = *outbytesleft;
|
|
int outcount = cd->ofuncs.xxx_wctomb(cd,outptr,wc,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
/* Handle Unicode tag characters (range U+E0000..U+E007F). */
|
|
if ((wc >> 7) == (0xe0000 >> 7))
|
|
goto outcount_zero;
|
|
/* Try transliteration. */
|
|
result++;
|
|
if (cd->transliterate) {
|
|
outcount = unicode_transliterate(cd,wc,outptr,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
}
|
|
if (cd->discard_ilseq) {
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
else if (cd->fallbacks.uc_to_mb_fallback != NULL) {
|
|
struct uc_to_mb_fallback_locals locals;
|
|
locals.l_outbuf = outptr;
|
|
locals.l_outbytesleft = outleft;
|
|
locals.l_errno = 0;
|
|
cd->fallbacks.uc_to_mb_fallback(wc,
|
|
uc_to_mb_write_replacement,
|
|
&locals,
|
|
cd->fallbacks.data);
|
|
if (locals.l_errno != 0) {
|
|
cd->istate = last_istate;
|
|
errno = locals.l_errno;
|
|
return -1;
|
|
}
|
|
outptr = locals.l_outbuf;
|
|
outleft = locals.l_outbytesleft;
|
|
outcount = 0;
|
|
goto outcount_ok;
|
|
}
|
|
#endif
|
|
outcount = cd->ofuncs.xxx_wctomb(cd,outptr,0xFFFD,outleft);
|
|
if (outcount != RET_ILUNI)
|
|
goto outcount_ok;
|
|
cd->istate = last_istate;
|
|
errno = EILSEQ;
|
|
return -1;
|
|
outcount_ok:
|
|
if (outcount < 0) {
|
|
cd->istate = last_istate;
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
#ifndef LIBICONV_PLUG
|
|
if (cd->hooks.uc_hook)
|
|
(*cd->hooks.uc_hook)(wc, cd->hooks.data);
|
|
#endif
|
|
if (!(outcount <= outleft)) abort();
|
|
outptr += outcount;
|
|
outleft -= outcount;
|
|
outcount_zero:
|
|
*outbuf = (char*) outptr;
|
|
*outbytesleft = outleft;
|
|
}
|
|
}
|
|
if (cd->ofuncs.xxx_reset) {
|
|
unsigned char* outptr = (unsigned char*) *outbuf;
|
|
size_t outleft = *outbytesleft;
|
|
int outcount = cd->ofuncs.xxx_reset(cd,outptr,outleft);
|
|
if (outcount < 0) {
|
|
errno = E2BIG;
|
|
return -1;
|
|
}
|
|
if (!(outcount <= outleft)) abort();
|
|
*outbuf = (char*) (outptr + outcount);
|
|
*outbytesleft = outleft - outcount;
|
|
}
|
|
memset(&cd->istate,'\0',sizeof(state_t));
|
|
memset(&cd->ostate,'\0',sizeof(state_t));
|
|
return result;
|
|
}
|
|
}
|