mirror of
git://source.winehq.org/git/wine.git
synced 2024-11-05 18:01:34 +00:00
280 lines
8.9 KiB
C
280 lines
8.9 KiB
C
/*
|
|
* MultiByteToWideChar implementation
|
|
*
|
|
* Copyright 2000 Alexandre Julliard
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "winnls.h"
|
|
#include "wine/unicode.h"
|
|
|
|
/* get the decomposition of a Unicode char */
|
|
static int get_decomposition( WCHAR src, WCHAR *dst, unsigned int dstlen )
|
|
{
|
|
extern const WCHAR unicode_decompose_table[];
|
|
const WCHAR *ptr = unicode_decompose_table;
|
|
int res;
|
|
|
|
*dst = src;
|
|
ptr = unicode_decompose_table + ptr[src >> 8];
|
|
ptr = unicode_decompose_table + ptr[(src >> 4) & 0x0f] + 2 * (src & 0x0f);
|
|
if (!*ptr) return 1;
|
|
if (dstlen <= 1) return 0;
|
|
/* apply the decomposition recursively to the first char */
|
|
if ((res = get_decomposition( *ptr, dst, dstlen-1 ))) dst[res++] = ptr[1];
|
|
return res;
|
|
}
|
|
|
|
/* check src string for invalid chars; return non-zero if invalid char found */
|
|
static inline int check_invalid_chars_sbcs( const struct sbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
while (srclen)
|
|
{
|
|
if (cp2uni[*src] == table->info.def_unicode_char && *src != table->info.def_char)
|
|
break;
|
|
src++;
|
|
srclen--;
|
|
}
|
|
return srclen;
|
|
}
|
|
|
|
/* mbstowcs for single-byte code page */
|
|
/* all lengths are in characters, not bytes */
|
|
static inline int mbstowcs_sbcs( const struct sbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen,
|
|
WCHAR *dst, unsigned int dstlen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
int ret = srclen;
|
|
|
|
if (dstlen < srclen)
|
|
{
|
|
/* buffer too small: fill it up to dstlen and return error */
|
|
srclen = dstlen;
|
|
ret = -1;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
switch(srclen)
|
|
{
|
|
default:
|
|
case 16: dst[15] = cp2uni[src[15]];
|
|
case 15: dst[14] = cp2uni[src[14]];
|
|
case 14: dst[13] = cp2uni[src[13]];
|
|
case 13: dst[12] = cp2uni[src[12]];
|
|
case 12: dst[11] = cp2uni[src[11]];
|
|
case 11: dst[10] = cp2uni[src[10]];
|
|
case 10: dst[9] = cp2uni[src[9]];
|
|
case 9: dst[8] = cp2uni[src[8]];
|
|
case 8: dst[7] = cp2uni[src[7]];
|
|
case 7: dst[6] = cp2uni[src[6]];
|
|
case 6: dst[5] = cp2uni[src[5]];
|
|
case 5: dst[4] = cp2uni[src[4]];
|
|
case 4: dst[3] = cp2uni[src[3]];
|
|
case 3: dst[2] = cp2uni[src[2]];
|
|
case 2: dst[1] = cp2uni[src[1]];
|
|
case 1: dst[0] = cp2uni[src[0]];
|
|
case 0: break;
|
|
}
|
|
if (srclen < 16) return ret;
|
|
dst += 16;
|
|
src += 16;
|
|
srclen -= 16;
|
|
}
|
|
}
|
|
|
|
/* mbstowcs for single-byte code page with char decomposition */
|
|
static int mbstowcs_sbcs_decompose( const struct sbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen,
|
|
WCHAR *dst, unsigned int dstlen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
unsigned int len;
|
|
|
|
if (!dstlen) /* compute length */
|
|
{
|
|
WCHAR dummy[4]; /* no decomposition is larger than 4 chars */
|
|
for (len = 0; srclen; srclen--, src++)
|
|
len += get_decomposition( cp2uni[*src], dummy, 4 );
|
|
return len;
|
|
}
|
|
|
|
for (len = dstlen; srclen && len; srclen--, src++)
|
|
{
|
|
int res = get_decomposition( cp2uni[*src], dst, len );
|
|
if (!res) break;
|
|
len -= res;
|
|
dst += res;
|
|
}
|
|
if (srclen) return -1; /* overflow */
|
|
return dstlen - len;
|
|
}
|
|
|
|
/* query necessary dst length for src string */
|
|
static inline int get_length_dbcs( const struct dbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen )
|
|
{
|
|
const unsigned char * const cp2uni_lb = table->cp2uni_leadbytes;
|
|
int len;
|
|
|
|
for (len = 0; srclen; srclen--, src++, len++)
|
|
{
|
|
if (cp2uni_lb[*src])
|
|
{
|
|
if (!--srclen) break; /* partial char, ignore it */
|
|
src++;
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* check src string for invalid chars; return non-zero if invalid char found */
|
|
static inline int check_invalid_chars_dbcs( const struct dbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
const unsigned char * const cp2uni_lb = table->cp2uni_leadbytes;
|
|
|
|
while (srclen)
|
|
{
|
|
unsigned char off = cp2uni_lb[*src];
|
|
if (off) /* multi-byte char */
|
|
{
|
|
if (srclen == 1) break; /* partial char, error */
|
|
if (cp2uni[(off << 8) + src[1]] == table->info.def_unicode_char &&
|
|
((src[0] << 8) | src[1]) != table->info.def_char) break;
|
|
src++;
|
|
srclen--;
|
|
}
|
|
else if (cp2uni[*src] == table->info.def_unicode_char &&
|
|
*src != table->info.def_char) break;
|
|
src++;
|
|
srclen--;
|
|
}
|
|
return srclen;
|
|
}
|
|
|
|
/* mbstowcs for double-byte code page */
|
|
/* all lengths are in characters, not bytes */
|
|
static inline int mbstowcs_dbcs( const struct dbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen,
|
|
WCHAR *dst, unsigned int dstlen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
const unsigned char * const cp2uni_lb = table->cp2uni_leadbytes;
|
|
unsigned int len;
|
|
|
|
if (!dstlen) return get_length_dbcs( table, src, srclen );
|
|
|
|
for (len = dstlen; srclen && len; len--, srclen--, src++, dst++)
|
|
{
|
|
unsigned char off = cp2uni_lb[*src];
|
|
if (off)
|
|
{
|
|
if (!--srclen) break; /* partial char, ignore it */
|
|
src++;
|
|
*dst = cp2uni[(off << 8) + *src];
|
|
}
|
|
else *dst = cp2uni[*src];
|
|
}
|
|
if (srclen) return -1; /* overflow */
|
|
return dstlen - len;
|
|
}
|
|
|
|
|
|
/* mbstowcs for double-byte code page with character decomposition */
|
|
static int mbstowcs_dbcs_decompose( const struct dbcs_table *table,
|
|
const unsigned char *src, unsigned int srclen,
|
|
WCHAR *dst, unsigned int dstlen )
|
|
{
|
|
const WCHAR * const cp2uni = table->cp2uni;
|
|
const unsigned char * const cp2uni_lb = table->cp2uni_leadbytes;
|
|
unsigned int len;
|
|
WCHAR ch;
|
|
int res;
|
|
|
|
if (!dstlen) /* compute length */
|
|
{
|
|
WCHAR dummy[4]; /* no decomposition is larger than 4 chars */
|
|
for (len = 0; srclen; srclen--, src++)
|
|
{
|
|
unsigned char off = cp2uni_lb[*src];
|
|
if (off)
|
|
{
|
|
if (!--srclen) break; /* partial char, ignore it */
|
|
src++;
|
|
ch = cp2uni[(off << 8) + *src];
|
|
}
|
|
else ch = cp2uni[*src];
|
|
len += get_decomposition( ch, dummy, 4 );
|
|
}
|
|
return len;
|
|
}
|
|
|
|
for (len = dstlen; srclen && len; srclen--, src++)
|
|
{
|
|
unsigned char off = cp2uni_lb[*src];
|
|
if (off)
|
|
{
|
|
if (!--srclen) break; /* partial char, ignore it */
|
|
src++;
|
|
ch = cp2uni[(off << 8) + *src];
|
|
}
|
|
else ch = cp2uni[*src];
|
|
if (!(res = get_decomposition( ch, dst, len ))) break;
|
|
dst += res;
|
|
len -= res;
|
|
}
|
|
if (srclen) return -1; /* overflow */
|
|
return dstlen - len;
|
|
}
|
|
|
|
|
|
/* return -1 on dst buffer overflow, -2 on invalid input char */
|
|
int cp_mbstowcs( const union cptable *table, int flags,
|
|
const char *src, int srclen,
|
|
WCHAR *dst, int dstlen )
|
|
{
|
|
if (table->info.char_size == 1)
|
|
{
|
|
if (flags & MB_ERR_INVALID_CHARS)
|
|
{
|
|
if (check_invalid_chars_sbcs( &table->sbcs, src, srclen )) return -2;
|
|
}
|
|
if (!(flags & MB_COMPOSITE))
|
|
{
|
|
if (!dstlen) return srclen;
|
|
return mbstowcs_sbcs( &table->sbcs, src, srclen, dst, dstlen );
|
|
}
|
|
return mbstowcs_sbcs_decompose( &table->sbcs, src, srclen, dst, dstlen );
|
|
}
|
|
else /* mbcs */
|
|
{
|
|
if (flags & MB_ERR_INVALID_CHARS)
|
|
{
|
|
if (check_invalid_chars_dbcs( &table->dbcs, src, srclen )) return -2;
|
|
}
|
|
if (!(flags & MB_COMPOSITE))
|
|
return mbstowcs_dbcs( &table->dbcs, src, srclen, dst, dstlen );
|
|
else
|
|
return mbstowcs_dbcs_decompose( &table->dbcs, src, srclen, dst, dstlen );
|
|
}
|
|
}
|