2 * String Table Functions
4 * Copyright 2002-2004, Mike McCormack for CodeWeavers
5 * Copyright 2007 Robert Shearman for CodeWeavers
6 * Copyright 2010 Hans Leidekker for CodeWeavers
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
31 #include "wine/debug.h"
32 #include "wine/unicode.h"
42 WINE_DEFAULT_DEBUG_CHANNEL(msidb);
44 typedef struct _msistring
46 USHORT persistent_refcount;
47 USHORT nonpersistent_refcount;
53 UINT maxcount; /* the number of strings */
57 msistring *strings; /* an array of strings */
58 UINT *sorted; /* index */
61 static string_table *init_stringtable( int entries, UINT codepage )
65 if (codepage != CP_ACP && !IsValidCodePage(codepage))
67 ERR("invalid codepage %d\n", codepage);
71 st = msi_alloc( sizeof (string_table) );
77 st->strings = msi_alloc_zero( sizeof (msistring) * entries );
84 st->sorted = msi_alloc( sizeof (UINT) * entries );
87 msi_free( st->strings );
92 st->maxcount = entries;
94 st->codepage = codepage;
100 VOID msi_destroy_stringtable( string_table *st )
104 for( i=0; i<st->maxcount; i++ )
106 if( st->strings[i].persistent_refcount ||
107 st->strings[i].nonpersistent_refcount )
108 msi_free( st->strings[i].str );
110 msi_free( st->strings );
111 msi_free( st->sorted );
115 static int st_find_free_entry( string_table *st )
124 for( i = st->freeslot; i < st->maxcount; i++ )
125 if( !st->strings[i].persistent_refcount &&
126 !st->strings[i].nonpersistent_refcount )
129 for( i = 1; i < st->maxcount; i++ )
130 if( !st->strings[i].persistent_refcount &&
131 !st->strings[i].nonpersistent_refcount )
134 /* dynamically resize */
135 sz = st->maxcount + 1 + st->maxcount/2;
136 p = msi_realloc_zero( st->strings, sz*sizeof(msistring) );
140 s = msi_realloc( st->sorted, sz*sizeof(UINT) );
150 st->freeslot = st->maxcount;
152 if( st->strings[st->freeslot].persistent_refcount ||
153 st->strings[st->freeslot].nonpersistent_refcount )
154 ERR("oops. expected freeslot to be free...\n");
158 static int find_insert_index( const string_table *st, UINT string_id )
160 int i, c, low = 0, high = st->sortcount - 1;
164 i = (low + high) / 2;
165 c = lstrcmpW( st->strings[string_id].str, st->strings[st->sorted[i]].str );
172 return -1; /* already exists */
177 static void insert_string_sorted( string_table *st, UINT string_id )
181 i = find_insert_index( st, string_id );
185 memmove( &st->sorted[i] + 1, &st->sorted[i], (st->sortcount - i) * sizeof(UINT) );
186 st->sorted[i] = string_id;
190 static void set_st_entry( string_table *st, UINT n, LPWSTR str, USHORT refcount, enum StringPersistence persistence )
192 if (persistence == StringPersistent)
194 st->strings[n].persistent_refcount = refcount;
195 st->strings[n].nonpersistent_refcount = 0;
199 st->strings[n].persistent_refcount = 0;
200 st->strings[n].nonpersistent_refcount = refcount;
203 st->strings[n].str = str;
205 insert_string_sorted( st, n );
207 if( n < st->maxcount )
208 st->freeslot = n + 1;
211 static UINT msi_string2idA( const string_table *st, LPCSTR buffer, UINT *id )
214 UINT r = ERROR_INVALID_PARAMETER;
217 TRACE("Finding string %s in string table\n", debugstr_a(buffer) );
222 return ERROR_SUCCESS;
225 sz = MultiByteToWideChar( st->codepage, 0, buffer, -1, NULL, 0 );
228 str = msi_alloc( sz*sizeof(WCHAR) );
230 return ERROR_NOT_ENOUGH_MEMORY;
231 MultiByteToWideChar( st->codepage, 0, buffer, -1, str, sz );
233 r = msi_string2idW( st, str, id );
239 static int msi_addstring( string_table *st, UINT n, const CHAR *data, int len, USHORT refcount, enum StringPersistence persistence )
250 if( st->strings[n].persistent_refcount ||
251 st->strings[n].nonpersistent_refcount )
256 if( ERROR_SUCCESS == msi_string2idA( st, data, &n ) )
258 if (persistence == StringPersistent)
259 st->strings[n].persistent_refcount += refcount;
261 st->strings[n].nonpersistent_refcount += refcount;
264 n = st_find_free_entry( st );
271 ERR("invalid index adding %s (%d)\n", debugstr_a( data ), n );
275 /* allocate a new string */
278 sz = MultiByteToWideChar( st->codepage, 0, data, len, NULL, 0 );
279 str = msi_alloc( (sz+1)*sizeof(WCHAR) );
282 MultiByteToWideChar( st->codepage, 0, data, len, str, sz );
285 set_st_entry( st, n, str, refcount, persistence );
290 int msi_addstringW( string_table *st, const WCHAR *data, int len, USHORT refcount, enum StringPersistence persistence )
300 if( msi_string2idW( st, data, &n ) == ERROR_SUCCESS )
302 if (persistence == StringPersistent)
303 st->strings[n].persistent_refcount += refcount;
305 st->strings[n].nonpersistent_refcount += refcount;
309 n = st_find_free_entry( st );
313 /* allocate a new string */
316 TRACE("%s, n = %d len = %d\n", debugstr_w(data), n, len );
318 str = msi_alloc( (len+1)*sizeof(WCHAR) );
321 memcpy( str, data, len*sizeof(WCHAR) );
324 set_st_entry( st, n, str, refcount, persistence );
329 /* find the string identified by an id - return null if there's none */
330 const WCHAR *msi_string_lookup_id( const string_table *st, UINT id )
335 if( id >= st->maxcount )
338 if( id && !st->strings[id].persistent_refcount && !st->strings[id].nonpersistent_refcount)
341 return st->strings[id].str;
347 * [in] st - pointer to the string table
348 * [in] id - id of the string to retrieve
349 * [out] buffer - destination of the UTF8 string
350 * [in/out] sz - number of bytes available in the buffer on input
351 * number of bytes used on output
353 * The size includes the terminating nul character. Short buffers
354 * will be filled, but not nul terminated.
356 static UINT msi_id2stringA( const string_table *st, UINT id, LPSTR buffer, UINT *sz )
362 TRACE("Finding string %d of %d\n", id, st->maxcount);
364 str = msi_string_lookup_id( st, id );
366 return ERROR_FUNCTION_FAILED;
368 len = WideCharToMultiByte( st->codepage, 0, str, -1, NULL, 0, NULL, NULL );
373 return ERROR_SUCCESS;
378 n = strlenW( str ) + 1;
379 while( n && (len > *sz) )
380 len = WideCharToMultiByte( st->codepage, 0,
381 str, --n, NULL, 0, NULL, NULL );
386 *sz = WideCharToMultiByte( st->codepage, 0, str, n, buffer, len, NULL, NULL );
388 return ERROR_SUCCESS;
394 * [in] st - pointer to the string table
395 * [in] str - string to find in the string table
396 * [out] id - id of the string, if found
398 UINT msi_string2idW( const string_table *st, LPCWSTR str, UINT *id )
400 int i, c, low = 0, high = st->sortcount - 1;
404 i = (low + high) / 2;
405 c = lstrcmpW( str, st->strings[st->sorted[i]].str );
414 return ERROR_SUCCESS;
418 return ERROR_INVALID_PARAMETER;
421 static void string_totalsize( const string_table *st, UINT *datasize, UINT *poolsize )
423 UINT i, len, holesize;
425 if( st->strings[0].str || st->strings[0].persistent_refcount || st->strings[0].nonpersistent_refcount)
426 ERR("oops. element 0 has a string\n");
431 for( i=1; i<st->maxcount; i++ )
433 if( !st->strings[i].persistent_refcount )
435 TRACE("[%u] nonpersistent = %s\n", i, debugstr_w(st->strings[i].str));
438 else if( st->strings[i].str )
440 TRACE("[%u] = %s\n", i, debugstr_w(st->strings[i].str));
441 len = WideCharToMultiByte( st->codepage, 0,
442 st->strings[i].str, -1, NULL, 0, NULL, NULL);
448 (*poolsize) += holesize + 4;
454 TRACE("data %u pool %u codepage %x\n", *datasize, *poolsize, st->codepage );
457 static const WCHAR szStringData[] = {
458 '_','S','t','r','i','n','g','D','a','t','a',0 };
459 static const WCHAR szStringPool[] = {
460 '_','S','t','r','i','n','g','P','o','o','l',0 };
462 HRESULT msi_init_string_table( IStorage *stg )
464 USHORT zero[2] = { 0, 0 };
467 /* create the StringPool stream... add the zero string to it*/
468 ret = write_stream_data(stg, szStringPool, zero, sizeof zero, TRUE);
469 if (ret != ERROR_SUCCESS)
472 /* create the StringData stream... make it zero length */
473 ret = write_stream_data(stg, szStringData, NULL, 0, TRUE);
474 if (ret != ERROR_SUCCESS)
480 string_table *msi_load_string_table( IStorage *stg, UINT *bytes_per_strref )
482 string_table *st = NULL;
485 UINT r, datasize = 0, poolsize = 0, codepage;
486 DWORD i, count, offset, len, n, refs;
488 r = read_stream_data( stg, szStringPool, TRUE, (BYTE **)&pool, &poolsize );
489 if( r != ERROR_SUCCESS)
491 r = read_stream_data( stg, szStringData, TRUE, (BYTE **)&data, &datasize );
492 if( r != ERROR_SUCCESS)
495 if ( (poolsize > 4) && (pool[1] & 0x8000) )
496 *bytes_per_strref = LONG_STR_BYTES;
498 *bytes_per_strref = sizeof(USHORT);
502 codepage = pool[0] | ( (pool[1] & ~0x8000) << 16 );
505 st = init_stringtable( count, codepage );
514 /* the string reference count is always the second word */
517 /* empty entries have two zeros, still have a string id */
518 if (pool[i*2] == 0 && refs == 0)
526 * If a string is over 64k, the previous string entry is made null
527 * and its the high word of the length is inserted in the null string's
528 * reference count field.
532 len = (pool[i*2+3] << 16) + pool[i*2+2];
541 if ( (offset + len) > datasize )
543 ERR("string table corrupt?\n");
547 r = msi_addstring( st, n, data+offset, len, refs, StringPersistent );
549 ERR("Failed to add string %d\n", n );
554 if ( datasize != offset )
555 ERR("string table load failed! (%08x != %08x), please report\n", datasize, offset );
557 TRACE("Loaded %d strings\n", count);
566 UINT msi_save_string_table( const string_table *st, IStorage *storage, UINT *bytes_per_strref )
568 UINT i, datasize = 0, poolsize = 0, sz, used, r, codepage, n;
569 UINT ret = ERROR_FUNCTION_FAILED;
575 /* construct the new table in memory first */
576 string_totalsize( st, &datasize, &poolsize );
578 TRACE("%u %u %u\n", st->maxcount, datasize, poolsize );
580 pool = msi_alloc( poolsize );
583 WARN("Failed to alloc pool %d bytes\n", poolsize );
586 data = msi_alloc( datasize );
589 WARN("Failed to alloc data %d bytes\n", poolsize );
594 codepage = st->codepage;
595 pool[0] = codepage & 0xffff;
596 pool[1] = codepage >> 16;
597 if (st->maxcount > 0xffff)
600 *bytes_per_strref = LONG_STR_BYTES;
603 *bytes_per_strref = sizeof(USHORT);
606 for( i=1; i<st->maxcount; i++ )
608 if( !st->strings[i].persistent_refcount )
616 sz = datasize - used;
617 r = msi_id2stringA( st, i, data+used, &sz );
618 if( r != ERROR_SUCCESS )
620 ERR("failed to fetch string\n");
623 if( sz && (sz < (datasize - used ) ) )
627 pool[ n*2 + 1 ] = st->strings[i].persistent_refcount;
638 pool[ n*2 + 2 ] = sz&0xffff;
639 pool[ n*2 + 3 ] = (sz>>16);
643 if( used > datasize )
645 ERR("oops overran %d >= %d\n", used, datasize);
650 if( used != datasize )
652 ERR("oops used %d != datasize %d\n", used, datasize);
656 /* write the streams */
657 r = write_stream_data( storage, szStringData, data, datasize, TRUE );
658 TRACE("Wrote StringData r=%08x\n", r);
661 r = write_stream_data( storage, szStringPool, pool, poolsize, TRUE );
662 TRACE("Wrote StringPool r=%08x\n", r);