/* Character set conversion.
Copyright (C) 1999-2001, 2007, 2009-2017 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <iconv.h>
#include <stddef.h>
#if REPLACE_ICONV_UTF
# include <errno.h>
# include <stdint.h>
# include <stdlib.h>
# include "unistr.h"
# ifndef uintptr_t
# define uintptr_t unsigned long
# endif
#endif
#if REPLACE_ICONV_UTF
/* UTF-{16,32}{BE,LE} converters taken from GNU libiconv 1.11. */
/* Return code if invalid. (xxx_mbtowc) */
# define RET_ILSEQ -1
/* Return code if no bytes were read. (xxx_mbtowc) */
# define RET_TOOFEW -2
/* Return code if invalid. (xxx_wctomb) */
# define RET_ILUNI -1
/* Return code if output buffer is too small. (xxx_wctomb, xxx_reset) */
# define RET_TOOSMALL -2
/*
* UTF-16BE
*/
/* Specification: RFC 2781 */
static int
utf16be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
{
if (n >= 2)
{
ucs4_t wc = (s[0] << 8) + s[1];
if (wc >= 0xd800 && wc < 0xdc00)
{
if (n >= 4)
{
ucs4_t wc2 = (s[2] << 8) + s[3];
if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
return RET_ILSEQ;
*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
return 4;
}
}
else if (wc >= 0xdc00 && wc < 0xe000)
{
return RET_ILSEQ;
}
else
{
*pwc = wc;
return 2;
}
}
return RET_TOOFEW;
}
static int
utf16be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
{
if (!(wc >= 0xd800 && wc < 0xe000))
{
if (wc < 0x10000)
{
if (n >= 2)
{
r[0] = (unsigned char) (wc >> 8);
r[1] = (unsigned char) wc;
return 2;
}
else
return RET_TOOSMALL;
}
else if (wc < 0x110000)
{
if (n >= 4)
{
ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
r[0] = (unsigned char) (wc1 >> 8);
r[1] = (unsigned char) wc1;
r[2] = (unsigned char) (wc2 >> 8);
r[3] = (unsigned char) wc2;
return 4;
}
else
return RET_TOOSMALL;
}
}
return RET_ILUNI;
}
/*
* UTF-16LE
*/
/* Specification: RFC 2781 */
static int
utf16le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
{
if (n >= 2)
{
ucs4_t wc = s[0] + (s[1] << 8);
if (wc >= 0xd800 && wc < 0xdc00)
{
if (n >= 4)
{
ucs4_t wc2 = s[2] + (s[3] << 8);
if (!(wc2 >= 0xdc00 && wc2 < 0xe000))
return RET_ILSEQ;
*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00);
return 4;
}
}
else if (wc >= 0xdc00 && wc < 0xe000)
{
return RET_ILSEQ;
}
else
{
*pwc = wc;
return 2;
}
}
return RET_TOOFEW;
}
static int
utf16le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
{
if (!(wc >= 0xd800 && wc < 0xe000))
{
if (wc < 0x10000)
{
if (n >= 2)
{
r[0] = (unsigned char) wc;
r[1] = (unsigned char) (wc >> 8);
return 2;
}
else
return RET_TOOSMALL;
}
else if (wc < 0x110000)
{
if (n >= 4)
{
ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10);
ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff);
r[0] = (unsigned char) wc1;
r[1] = (unsigned char) (wc1 >> 8);
r[2] = (unsigned char) wc2;
r[3] = (unsigned char) (wc2 >> 8);
return 4;
}
else
return RET_TOOSMALL;
}
}
return RET_ILUNI;
}
/*
* UTF-32BE
*/
/* Specification: Unicode 3.1 Standard Annex #19 */
static int
utf32be_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
{
if (n >= 4)
{
ucs4_t wc = (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3];
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
{
*pwc = wc;
return 4;
}
else
return RET_ILSEQ;
}
return RET_TOOFEW;
}
static int
utf32be_wctomb (unsigned char *r, ucs4_t wc, size_t n)
{
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
{
if (n >= 4)
{
r[0] = 0;
r[1] = (unsigned char) (wc >> 16);
r[2] = (unsigned char) (wc >> 8);
r[3] = (unsigned char) wc;
return 4;
}
else
return RET_TOOSMALL;
}
return RET_ILUNI;
}
/*
* UTF-32LE
*/
/* Specification: Unicode 3.1 Standard Annex #19 */
static int
utf32le_mbtowc (ucs4_t *pwc, const unsigned char *s, size_t n)
{
if (n >= 4)
{
ucs4_t wc = s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24);
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
{
*pwc = wc;
return 4;
}
else
return RET_ILSEQ;
}
return RET_TOOFEW;
}
static int
utf32le_wctomb (unsigned char *r, ucs4_t wc, size_t n)
{
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000))
{
if (n >= 4)
{
r[0] = (unsigned char) wc;
r[1] = (unsigned char) (wc >> 8);
r[2] = (unsigned char) (wc >> 16);
r[3] = 0;
return 4;
}
else
return RET_TOOSMALL;
}
return RET_ILUNI;
}
#endif
size_t
rpl_iconv (iconv_t cd,
ICONV_CONST char **inbuf, size_t *inbytesleft,
char **outbuf, size_t *outbytesleft)
#undef iconv
{
#if REPLACE_ICONV_UTF
switch ((uintptr_t) cd)
{
{
int (*xxx_wctomb) (unsigned char *, ucs4_t, size_t);
case (uintptr_t) _ICONV_UTF8_UTF16BE:
xxx_wctomb = utf16be_wctomb;
goto loop_from_utf8;
case (uintptr_t) _ICONV_UTF8_UTF16LE:
xxx_wctomb = utf16le_wctomb;
goto loop_from_utf8;
case (uintptr_t) _ICONV_UTF8_UTF32BE:
xxx_wctomb = utf32be_wctomb;
goto loop_from_utf8;
case (uintptr_t) _ICONV_UTF8_UTF32LE:
xxx_wctomb = utf32le_wctomb;
goto loop_from_utf8;
loop_from_utf8:
if (inbuf == NULL || *inbuf == NULL)
return 0;
{
ICONV_CONST char *inptr = *inbuf;
size_t inleft = *inbytesleft;
char *outptr = *outbuf;
size_t outleft = *outbytesleft;
size_t res = 0;
while (inleft > 0)
{
ucs4_t uc;
int m = u8_mbtoucr (&uc, (const uint8_t *) inptr, inleft);
if (m <= 0)
{
if (m == -1)
{
errno = EILSEQ;
res = (size_t)(-1);
break;
}
if (m == -2)
{
errno = EINVAL;
res = (size_t)(-1);
break;
}
abort ();
}
else
{
int n = xxx_wctomb ((uint8_t *) outptr, uc, outleft);
if (n < 0)
{
if (n == RET_ILUNI)
{
errno = EILSEQ;
res = (size_t)(-1);
break;
}
if (n == RET_TOOSMALL)
{
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;
}
}
{
int (*xxx_mbtowc) (ucs4_t *, const unsigned char *, size_t);
case (uintptr_t) _ICONV_UTF16BE_UTF8:
xxx_mbtowc = utf16be_mbtowc;
goto loop_to_utf8;
case (uintptr_t) _ICONV_UTF16LE_UTF8:
xxx_mbtowc = utf16le_mbtowc;
goto loop_to_utf8;
case (uintptr_t) _ICONV_UTF32BE_UTF8:
xxx_mbtowc = utf32be_mbtowc;
goto loop_to_utf8;
case (uintptr_t) _ICONV_UTF32LE_UTF8:
xxx_mbtowc = utf32le_mbtowc;
goto loop_to_utf8;
loop_to_utf8:
if (inbuf == NULL || *inbuf == NULL)
return 0;
{
ICONV_CONST char *inptr = *inbuf;
size_t inleft = *inbytesleft;
char *outptr = *outbuf;
size_t outleft = *outbytesleft;
size_t res = 0;
while (inleft > 0)
{
ucs4_t uc;
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);
}