+++ /dev/null
-/*
- * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include <string.h>
-
-#include "wine/unicode.h"
-
-extern unsigned int wine_decompose( WCHAR ch, WCHAR *dst, unsigned int dstlen );
-
-/* check the code whether it is in Unicode Private Use Area (PUA). */
-/* MB_ERR_INVALID_CHARS raises an error converting from 1-byte character to PUA. */
-static inline int is_private_use_area_char(WCHAR code)
-{
- return (code >= 0xe000 && code <= 0xf8ff);
-}
-
-/* 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, int flags,
- const unsigned char *src, unsigned int srclen )
-{
- const WCHAR * const cp2uni = (flags & MB_USEGLYPHCHARS) ? table->cp2uni_glyphs : table->cp2uni;
- const WCHAR def_unicode_char = table->info.def_unicode_char;
- const unsigned char def_char = table->uni2cp_low[table->uni2cp_high[def_unicode_char >> 8]
- + (def_unicode_char & 0xff)];
- while (srclen)
- {
- if ((cp2uni[*src] == def_unicode_char && *src != def_char) ||
- is_private_use_area_char(cp2uni[*src])) 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, int flags,
- const unsigned char *src, unsigned int srclen,
- WCHAR *dst, unsigned int dstlen )
-{
- const WCHAR * const cp2uni = (flags & MB_USEGLYPHCHARS) ? table->cp2uni_glyphs : 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, int flags,
- const unsigned char *src, unsigned int srclen,
- WCHAR *dst, unsigned int dstlen )
-{
- const WCHAR * const cp2uni = (flags & MB_USEGLYPHCHARS) ? table->cp2uni_glyphs : 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 += wine_decompose( cp2uni[*src], dummy, 4 );
- return len;
- }
-
- for (len = dstlen; srclen && len; srclen--, src++)
- {
- unsigned int res = wine_decompose( 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] && srclen > 1 && src[1])
- {
- src++;
- srclen--;
- }
- }
- 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;
- const WCHAR def_unicode_char = table->info.def_unicode_char;
- const unsigned short def_char = table->uni2cp_low[table->uni2cp_high[def_unicode_char >> 8]
- + (def_unicode_char & 0xff)];
- 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]] == def_unicode_char &&
- ((src[0] << 8) | src[1]) != def_char) break;
- src++;
- srclen--;
- }
- else if ((cp2uni[*src] == def_unicode_char && *src != def_char) ||
- is_private_use_area_char(cp2uni[*src])) 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 && srclen > 1 && src[1])
- {
- src++;
- srclen--;
- *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, res;
- WCHAR ch;
-
- 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 && srclen > 1 && src[1])
- {
- src++;
- srclen--;
- ch = cp2uni[(off << 8) + *src];
- }
- else ch = cp2uni[*src];
- len += wine_decompose( ch, dummy, 4 );
- }
- return len;
- }
-
- for (len = dstlen; srclen && len; srclen--, src++)
- {
- unsigned char off = cp2uni_lb[*src];
- if (off && srclen > 1 && src[1])
- {
- src++;
- srclen--;
- ch = cp2uni[(off << 8) + *src];
- }
- else ch = cp2uni[*src];
- if (!(res = wine_decompose( 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 wine_cp_mbstowcs( const union cptable *table, int flags,
- const char *s, int srclen,
- WCHAR *dst, int dstlen )
-{
- const unsigned char *src = (const unsigned char*) s;
-
- if (table->info.char_size == 1)
- {
- if (flags & MB_ERR_INVALID_CHARS)
- {
- if (check_invalid_chars_sbcs( &table->sbcs, flags, src, srclen )) return -2;
- }
- if (!(flags & MB_COMPOSITE))
- {
- if (!dstlen) return srclen;
- return mbstowcs_sbcs( &table->sbcs, flags, src, srclen, dst, dstlen );
- }
- return mbstowcs_sbcs_decompose( &table->sbcs, flags, 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 );
- }
-}
projects / reactos.git / blobdiff