2 * String Table Functions
4 * Copyright 2002-2004, Mike McCormack for CodeWeavers
5 * Copyright 2007 Robert Shearman for CodeWeavers
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
30 #include "wine/debug.h"
31 #include "wine/unicode.h"
41 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
43 #define HASH_SIZE 0x101
44 #define LONG_STR_BYTES 3
46 typedef struct _msistring
49 UINT persistent_refcount;
50 UINT nonpersistent_refcount;
56 UINT maxcount; /* the number of strings */
60 msistring *strings; /* an array of strings (in the tree) */
63 static UINT msistring_makehash( const WCHAR *str )
74 hash = (hash<<5) | (hash>>27);
76 return hash % HASH_SIZE;
79 static string_table *init_stringtable( int entries, UINT codepage )
84 st = msi_alloc( sizeof (string_table) );
89 st->strings = msi_alloc_zero( sizeof (msistring) * entries );
95 st->maxcount = entries;
97 st->codepage = codepage;
99 for( i=0; i<HASH_SIZE; i++ )
105 VOID msi_destroy_stringtable( string_table *st )
109 for( i=0; i<st->maxcount; i++ )
111 if( st->strings[i].persistent_refcount ||
112 st->strings[i].nonpersistent_refcount )
113 msi_free( st->strings[i].str );
115 msi_free( st->strings );
119 static int st_find_free_entry( string_table *st )
128 for( i = st->freeslot; i < st->maxcount; i++ )
129 if( !st->strings[i].persistent_refcount &&
130 !st->strings[i].nonpersistent_refcount )
133 for( i = 1; i < st->maxcount; i++ )
134 if( !st->strings[i].persistent_refcount &&
135 !st->strings[i].nonpersistent_refcount )
138 /* dynamically resize */
139 sz = st->maxcount + 1 + st->maxcount/2;
140 p = msi_realloc_zero( st->strings, sz*sizeof(msistring) );
144 st->freeslot = st->maxcount;
146 if( st->strings[st->freeslot].persistent_refcount ||
147 st->strings[st->freeslot].nonpersistent_refcount )
148 ERR("oops. expected freeslot to be free...\n");
152 static void set_st_entry( string_table *st, UINT n, LPWSTR str, UINT refcount, enum StringPersistence persistence )
154 UINT hash = msistring_makehash( str );
156 if (persistence == StringPersistent)
158 st->strings[n].persistent_refcount = refcount;
159 st->strings[n].nonpersistent_refcount = 0;
163 st->strings[n].persistent_refcount = 0;
164 st->strings[n].nonpersistent_refcount = refcount;
167 st->strings[n].str = str;
169 st->strings[n].hash_next = st->hash[hash];
172 if( n < st->maxcount )
173 st->freeslot = n + 1;
176 static int msi_addstring( string_table *st, UINT n, const CHAR *data, int len, UINT refcount, enum StringPersistence persistence )
187 if( st->strings[n].persistent_refcount ||
188 st->strings[n].nonpersistent_refcount )
193 if( ERROR_SUCCESS == msi_string2idA( st, data, &n ) )
195 if (persistence == StringPersistent)
196 st->strings[n].persistent_refcount += refcount;
198 st->strings[n].nonpersistent_refcount += refcount;
201 n = st_find_free_entry( st );
208 ERR("invalid index adding %s (%d)\n", debugstr_a( data ), n );
212 /* allocate a new string */
215 sz = MultiByteToWideChar( st->codepage, 0, data, len, NULL, 0 );
216 str = msi_alloc( (sz+1)*sizeof(WCHAR) );
219 MultiByteToWideChar( st->codepage, 0, data, len, str, sz );
222 set_st_entry( st, n, str, refcount, persistence );
227 int msi_addstringW( string_table *st, UINT n, const WCHAR *data, int len, UINT refcount, enum StringPersistence persistence )
231 /* TRACE("[%2d] = %s\n", string_no, debugstr_an(data,len) ); */
239 if( st->strings[n].persistent_refcount ||
240 st->strings[n].nonpersistent_refcount )
245 if( ERROR_SUCCESS == msi_string2idW( st, data, &n ) )
247 if (persistence == StringPersistent)
248 st->strings[n].persistent_refcount += refcount;
250 st->strings[n].nonpersistent_refcount += refcount;
253 n = st_find_free_entry( st );
260 ERR("invalid index adding %s (%d)\n", debugstr_w( data ), n );
264 /* allocate a new string */
267 TRACE("%s, n = %d len = %d\n", debugstr_w(data), n, len );
269 str = msi_alloc( (len+1)*sizeof(WCHAR) );
272 TRACE("%d\n",__LINE__);
273 memcpy( str, data, len*sizeof(WCHAR) );
276 set_st_entry( st, n, str, refcount, persistence );
281 /* find the string identified by an id - return null if there's none */
282 const WCHAR *msi_string_lookup_id( const string_table *st, UINT id )
284 static const WCHAR zero[] = { 0 };
288 if( id >= st->maxcount )
291 if( id && !st->strings[id].persistent_refcount && !st->strings[id].nonpersistent_refcount)
294 return st->strings[id].str;
300 * [in] st - pointer to the string table
301 * [in] id - id of the string to retrieve
302 * [out] buffer - destination of the string
303 * [in/out] sz - number of bytes available in the buffer on input
304 * number of bytes used on output
306 * The size includes the terminating nul character. Short buffers
307 * will be filled, but not nul terminated.
309 UINT msi_id2stringW( const string_table *st, UINT id, LPWSTR buffer, UINT *sz )
314 TRACE("Finding string %d of %d\n", id, st->maxcount);
316 str = msi_string_lookup_id( st, id );
318 return ERROR_FUNCTION_FAILED;
320 len = strlenW( str ) + 1;
325 return ERROR_SUCCESS;
330 memcpy( buffer, str, (*sz)*sizeof(WCHAR) );
333 return ERROR_SUCCESS;
339 * [in] st - pointer to the string table
340 * [in] id - id of the string to retrieve
341 * [out] buffer - destination of the UTF8 string
342 * [in/out] sz - number of bytes available in the buffer on input
343 * number of bytes used on output
345 * The size includes the terminating nul character. Short buffers
346 * will be filled, but not nul terminated.
348 UINT msi_id2stringA( const string_table *st, UINT id, LPSTR buffer, UINT *sz )
354 TRACE("Finding string %d of %d\n", id, st->maxcount);
356 str = msi_string_lookup_id( st, id );
358 return ERROR_FUNCTION_FAILED;
360 len = WideCharToMultiByte( st->codepage, 0, str, -1, NULL, 0, NULL, NULL );
365 return ERROR_SUCCESS;
370 n = strlenW( str ) + 1;
371 while( n && (len > *sz) )
372 len = WideCharToMultiByte( st->codepage, 0,
373 str, --n, NULL, 0, NULL, NULL );
378 *sz = WideCharToMultiByte( st->codepage, 0, str, n, buffer, len, NULL, NULL );
380 return ERROR_SUCCESS;
386 * [in] st - pointer to the string table
387 * [in] str - string to find in the string table
388 * [out] id - id of the string, if found
390 UINT msi_string2idW( const string_table *st, LPCWSTR str, UINT *id )
392 UINT n, hash = msistring_makehash( str );
393 msistring *se = st->strings;
395 for (n = st->hash[hash]; n != -1; n = st->strings[n].hash_next )
397 if ((str == se[n].str) || !lstrcmpW(str, se[n].str))
400 return ERROR_SUCCESS;
404 return ERROR_INVALID_PARAMETER;
407 UINT msi_string2idA( const string_table *st, LPCSTR buffer, UINT *id )
410 UINT r = ERROR_INVALID_PARAMETER;
413 TRACE("Finding string %s in string table\n", debugstr_a(buffer) );
418 return ERROR_SUCCESS;
421 sz = MultiByteToWideChar( st->codepage, 0, buffer, -1, NULL, 0 );
424 str = msi_alloc( sz*sizeof(WCHAR) );
426 return ERROR_NOT_ENOUGH_MEMORY;
427 MultiByteToWideChar( st->codepage, 0, buffer, -1, str, sz );
429 r = msi_string2idW( st, str, id );
435 UINT msi_strcmp( const string_table *st, UINT lval, UINT rval, UINT *res )
437 const WCHAR *l_str, *r_str;
439 l_str = msi_string_lookup_id( st, lval );
441 return ERROR_INVALID_PARAMETER;
443 r_str = msi_string_lookup_id( st, rval );
445 return ERROR_INVALID_PARAMETER;
447 /* does this do the right thing for all UTF-8 strings? */
448 *res = strcmpW( l_str, r_str );
450 return ERROR_SUCCESS;
453 static void string_totalsize( const string_table *st, UINT *datasize, UINT *poolsize )
455 UINT i, len, max, holesize;
457 if( st->strings[0].str || st->strings[0].persistent_refcount || st->strings[0].nonpersistent_refcount)
458 ERR("oops. element 0 has a string\n");
464 for( i=1; i<st->maxcount; i++ )
466 if( !st->strings[i].persistent_refcount )
468 if( st->strings[i].str )
470 TRACE("[%u] = %s\n", i, debugstr_w(st->strings[i].str));
471 len = WideCharToMultiByte( st->codepage, 0,
472 st->strings[i].str, -1, NULL, 0, NULL, NULL);
479 (*poolsize) += holesize + 4;
485 TRACE("data %u pool %u codepage %x\n", *datasize, *poolsize, st->codepage );
488 static const WCHAR szStringData[] = {
489 '_','S','t','r','i','n','g','D','a','t','a',0 };
490 static const WCHAR szStringPool[] = {
491 '_','S','t','r','i','n','g','P','o','o','l',0 };
493 HRESULT msi_init_string_table( IStorage *stg )
495 USHORT zero[2] = { 0, 0 };
498 /* create the StringPool stream... add the zero string to it*/
499 ret = write_stream_data(stg, szStringPool, zero, sizeof zero, TRUE);
500 if (ret != ERROR_SUCCESS)
503 /* create the StringData stream... make it zero length */
504 ret = write_stream_data(stg, szStringData, NULL, 0, TRUE);
505 if (ret != ERROR_SUCCESS)
511 string_table *msi_load_string_table( IStorage *stg, UINT *bytes_per_strref )
513 string_table *st = NULL;
516 UINT r, datasize = 0, poolsize = 0, codepage;
517 DWORD i, count, offset, len, n, refs;
519 static const USHORT large_str_sig[] = { 0x0000, 0x8000 };
521 r = read_stream_data( stg, szStringPool, &pool, &poolsize );
522 if( r != ERROR_SUCCESS)
524 r = read_stream_data( stg, szStringData, (USHORT**)&data, &datasize );
525 if( r != ERROR_SUCCESS)
528 if ( !memcmp(pool, large_str_sig, sizeof(large_str_sig)) )
529 *bytes_per_strref = LONG_STR_BYTES;
531 *bytes_per_strref = sizeof(USHORT);
533 /* FIXME: don't know where the codepage is in large str tables */
535 if( poolsize > 4 && *bytes_per_strref != LONG_STR_BYTES )
536 codepage = pool[0] | ( pool[1] << 16 );
539 st = init_stringtable( count, codepage );
546 /* the string reference count is always the second word */
549 /* empty entries have two zeros, still have a string id */
550 if (pool[i*2] == 0 && refs == 0)
558 * If a string is over 64k, the previous string entry is made null
559 * and its the high word of the length is inserted in the null string's
560 * reference count field.
564 len = (pool[i*2+3] << 16) + pool[i*2+2];
573 if ( (offset + len) > datasize )
575 ERR("string table corrupt?\n");
579 r = msi_addstring( st, n, data+offset, len, refs, StringPersistent );
581 ERR("Failed to add string %d\n", n );
586 if ( datasize != offset )
587 ERR("string table load failed! (%08x != %08x), please report\n", datasize, offset );
589 TRACE("Loaded %d strings\n", count);
598 UINT msi_save_string_table( const string_table *st, IStorage *storage )
600 UINT i, datasize = 0, poolsize = 0, sz, used, r, codepage, n;
601 UINT ret = ERROR_FUNCTION_FAILED;
607 /* construct the new table in memory first */
608 string_totalsize( st, &datasize, &poolsize );
610 TRACE("%u %u %u\n", st->maxcount, datasize, poolsize );
612 pool = msi_alloc( poolsize );
615 WARN("Failed to alloc pool %d bytes\n", poolsize );
618 data = msi_alloc( datasize );
621 WARN("Failed to alloc data %d bytes\n", poolsize );
626 codepage = st->codepage;
627 pool[0]=codepage&0xffff;
628 pool[1]=(codepage>>16);
630 for( i=1; i<st->maxcount; i++ )
632 if( !st->strings[i].persistent_refcount )
634 sz = datasize - used;
635 r = msi_id2stringA( st, i, data+used, &sz );
636 if( r != ERROR_SUCCESS )
638 ERR("failed to fetch string\n");
641 if( sz && (sz < (datasize - used ) ) )
645 pool[ n*2 + 1 ] = st->strings[i].persistent_refcount;
656 pool[ n*2 + 2 ] = sz&0xffff;
657 pool[ n*2 + 3 ] = (sz>>16);
661 if( used > datasize )
663 ERR("oops overran %d >= %d\n", used, datasize);
668 if( used != datasize )
670 ERR("oops used %d != datasize %d\n", used, datasize);
674 /* write the streams */
675 r = write_stream_data( storage, szStringData, data, datasize, TRUE );
676 TRACE("Wrote StringData r=%08x\n", r);
679 r = write_stream_data( storage, szStringPool, pool, poolsize, TRUE );
680 TRACE("Wrote StringPool r=%08x\n", r);