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 BOOL validate_codepage( UINT codepage )
63 if (codepage != CP_ACP && !IsValidCodePage( codepage ))
65 WARN("invalid codepage %u\n", codepage);
71 static string_table *init_stringtable( int entries, UINT codepage )
75 if (!validate_codepage( codepage ))
78 st = msi_alloc( sizeof (string_table) );
84 st->strings = msi_alloc_zero( sizeof (msistring) * entries );
91 st->sorted = msi_alloc( sizeof (UINT) * entries );
94 msi_free( st->strings );
99 st->maxcount = entries;
101 st->codepage = codepage;
107 VOID msi_destroy_stringtable( string_table *st )
111 for( i=0; i<st->maxcount; i++ )
113 if( st->strings[i].persistent_refcount ||
114 st->strings[i].nonpersistent_refcount )
115 msi_free( st->strings[i].str );
117 msi_free( st->strings );
118 msi_free( st->sorted );
122 static int st_find_free_entry( string_table *st )
131 for( i = st->freeslot; i < st->maxcount; i++ )
132 if( !st->strings[i].persistent_refcount &&
133 !st->strings[i].nonpersistent_refcount )
136 for( i = 1; i < st->maxcount; i++ )
137 if( !st->strings[i].persistent_refcount &&
138 !st->strings[i].nonpersistent_refcount )
141 /* dynamically resize */
142 sz = st->maxcount + 1 + st->maxcount/2;
143 p = msi_realloc_zero( st->strings, sz*sizeof(msistring) );
147 s = msi_realloc( st->sorted, sz*sizeof(UINT) );
157 st->freeslot = st->maxcount;
159 if( st->strings[st->freeslot].persistent_refcount ||
160 st->strings[st->freeslot].nonpersistent_refcount )
161 ERR("oops. expected freeslot to be free...\n");
165 static int find_insert_index( const string_table *st, UINT string_id )
167 int i, c, low = 0, high = st->sortcount - 1;
171 i = (low + high) / 2;
172 c = strcmpW( st->strings[string_id].str, st->strings[st->sorted[i]].str );
179 return -1; /* already exists */
184 static void insert_string_sorted( string_table *st, UINT string_id )
188 i = find_insert_index( st, string_id );
192 memmove( &st->sorted[i] + 1, &st->sorted[i], (st->sortcount - i) * sizeof(UINT) );
193 st->sorted[i] = string_id;
197 static void set_st_entry( string_table *st, UINT n, LPWSTR str, USHORT refcount, enum StringPersistence persistence )
199 if (persistence == StringPersistent)
201 st->strings[n].persistent_refcount = refcount;
202 st->strings[n].nonpersistent_refcount = 0;
206 st->strings[n].persistent_refcount = 0;
207 st->strings[n].nonpersistent_refcount = refcount;
210 st->strings[n].str = str;
212 insert_string_sorted( st, n );
214 if( n < st->maxcount )
215 st->freeslot = n + 1;
218 static UINT msi_string2idA( const string_table *st, LPCSTR buffer, UINT *id )
221 UINT r = ERROR_INVALID_PARAMETER;
224 TRACE("Finding string %s in string table\n", debugstr_a(buffer) );
229 return ERROR_SUCCESS;
232 sz = MultiByteToWideChar( st->codepage, 0, buffer, -1, NULL, 0 );
235 str = msi_alloc( sz*sizeof(WCHAR) );
237 return ERROR_NOT_ENOUGH_MEMORY;
238 MultiByteToWideChar( st->codepage, 0, buffer, -1, str, sz );
240 r = msi_string2idW( st, str, id );
246 static int msi_addstring( string_table *st, UINT n, const CHAR *data, int len, USHORT refcount, enum StringPersistence persistence )
257 if( st->strings[n].persistent_refcount ||
258 st->strings[n].nonpersistent_refcount )
263 if( ERROR_SUCCESS == msi_string2idA( st, data, &n ) )
265 if (persistence == StringPersistent)
266 st->strings[n].persistent_refcount += refcount;
268 st->strings[n].nonpersistent_refcount += refcount;
271 n = st_find_free_entry( st );
278 ERR("invalid index adding %s (%d)\n", debugstr_a( data ), n );
282 /* allocate a new string */
285 sz = MultiByteToWideChar( st->codepage, 0, data, len, NULL, 0 );
286 str = msi_alloc( (sz+1)*sizeof(WCHAR) );
289 MultiByteToWideChar( st->codepage, 0, data, len, str, sz );
292 set_st_entry( st, n, str, refcount, persistence );
297 int msi_addstringW( string_table *st, const WCHAR *data, int len, USHORT refcount, enum StringPersistence persistence )
307 if( msi_string2idW( st, data, &n ) == ERROR_SUCCESS )
309 if (persistence == StringPersistent)
310 st->strings[n].persistent_refcount += refcount;
312 st->strings[n].nonpersistent_refcount += refcount;
316 n = st_find_free_entry( st );
320 /* allocate a new string */
323 TRACE("%s, n = %d len = %d\n", debugstr_w(data), n, len );
325 str = msi_alloc( (len+1)*sizeof(WCHAR) );
328 memcpy( str, data, len*sizeof(WCHAR) );
331 set_st_entry( st, n, str, refcount, persistence );
336 /* find the string identified by an id - return null if there's none */
337 const WCHAR *msi_string_lookup_id( const string_table *st, UINT id )
342 if( id >= st->maxcount )
345 if( id && !st->strings[id].persistent_refcount && !st->strings[id].nonpersistent_refcount)
348 return st->strings[id].str;
354 * [in] st - pointer to the string table
355 * [in] id - id of the string to retrieve
356 * [out] buffer - destination of the UTF8 string
357 * [in/out] sz - number of bytes available in the buffer on input
358 * number of bytes used on output
360 * The size includes the terminating nul character. Short buffers
361 * will be filled, but not nul terminated.
363 static UINT msi_id2stringA( const string_table *st, UINT id, LPSTR buffer, UINT *sz )
369 TRACE("Finding string %d of %d\n", id, st->maxcount);
371 str = msi_string_lookup_id( st, id );
373 return ERROR_FUNCTION_FAILED;
375 len = WideCharToMultiByte( st->codepage, 0, str, -1, NULL, 0, NULL, NULL );
380 return ERROR_SUCCESS;
385 n = strlenW( str ) + 1;
386 while( n && (len > *sz) )
387 len = WideCharToMultiByte( st->codepage, 0,
388 str, --n, NULL, 0, NULL, NULL );
393 *sz = WideCharToMultiByte( st->codepage, 0, str, n, buffer, len, NULL, NULL );
395 return ERROR_SUCCESS;
401 * [in] st - pointer to the string table
402 * [in] str - string to find in the string table
403 * [out] id - id of the string, if found
405 UINT msi_string2idW( const string_table *st, LPCWSTR str, UINT *id )
407 int i, c, low = 0, high = st->sortcount - 1;
411 i = (low + high) / 2;
412 c = strcmpW( str, st->strings[st->sorted[i]].str );
421 return ERROR_SUCCESS;
425 return ERROR_INVALID_PARAMETER;
428 static void string_totalsize( const string_table *st, UINT *datasize, UINT *poolsize )
430 UINT i, len, holesize;
432 if( st->strings[0].str || st->strings[0].persistent_refcount || st->strings[0].nonpersistent_refcount)
433 ERR("oops. element 0 has a string\n");
438 for( i=1; i<st->maxcount; i++ )
440 if( !st->strings[i].persistent_refcount )
442 TRACE("[%u] nonpersistent = %s\n", i, debugstr_w(st->strings[i].str));
445 else if( st->strings[i].str )
447 TRACE("[%u] = %s\n", i, debugstr_w(st->strings[i].str));
448 len = WideCharToMultiByte( st->codepage, 0,
449 st->strings[i].str, -1, NULL, 0, NULL, NULL);
455 (*poolsize) += holesize + 4;
461 TRACE("data %u pool %u codepage %x\n", *datasize, *poolsize, st->codepage );
464 static const WCHAR szStringData[] = {
465 '_','S','t','r','i','n','g','D','a','t','a',0 };
466 static const WCHAR szStringPool[] = {
467 '_','S','t','r','i','n','g','P','o','o','l',0 };
469 HRESULT msi_init_string_table( IStorage *stg )
471 USHORT zero[2] = { 0, 0 };
474 /* create the StringPool stream... add the zero string to it*/
475 ret = write_stream_data(stg, szStringPool, zero, sizeof zero, TRUE);
476 if (ret != ERROR_SUCCESS)
479 /* create the StringData stream... make it zero length */
480 ret = write_stream_data(stg, szStringData, NULL, 0, TRUE);
481 if (ret != ERROR_SUCCESS)
487 string_table *msi_load_string_table( IStorage *stg, UINT *bytes_per_strref )
489 string_table *st = NULL;
492 UINT r, datasize = 0, poolsize = 0, codepage;
493 DWORD i, count, offset, len, n, refs;
495 r = read_stream_data( stg, szStringPool, TRUE, (BYTE **)&pool, &poolsize );
496 if( r != ERROR_SUCCESS)
498 r = read_stream_data( stg, szStringData, TRUE, (BYTE **)&data, &datasize );
499 if( r != ERROR_SUCCESS)
502 if ( (poolsize > 4) && (pool[1] & 0x8000) )
503 *bytes_per_strref = LONG_STR_BYTES;
505 *bytes_per_strref = sizeof(USHORT);
509 codepage = pool[0] | ( (pool[1] & ~0x8000) << 16 );
512 st = init_stringtable( count, codepage );
521 /* the string reference count is always the second word */
524 /* empty entries have two zeros, still have a string id */
525 if (pool[i*2] == 0 && refs == 0)
533 * If a string is over 64k, the previous string entry is made null
534 * and its the high word of the length is inserted in the null string's
535 * reference count field.
539 len = (pool[i*2+3] << 16) + pool[i*2+2];
548 if ( (offset + len) > datasize )
550 ERR("string table corrupt?\n");
554 r = msi_addstring( st, n, data+offset, len, refs, StringPersistent );
556 ERR("Failed to add string %d\n", n );
561 if ( datasize != offset )
562 ERR("string table load failed! (%08x != %08x), please report\n", datasize, offset );
564 TRACE("Loaded %d strings\n", count);
573 UINT msi_save_string_table( const string_table *st, IStorage *storage, UINT *bytes_per_strref )
575 UINT i, datasize = 0, poolsize = 0, sz, used, r, codepage, n;
576 UINT ret = ERROR_FUNCTION_FAILED;
582 /* construct the new table in memory first */
583 string_totalsize( st, &datasize, &poolsize );
585 TRACE("%u %u %u\n", st->maxcount, datasize, poolsize );
587 pool = msi_alloc( poolsize );
590 WARN("Failed to alloc pool %d bytes\n", poolsize );
593 data = msi_alloc( datasize );
596 WARN("Failed to alloc data %d bytes\n", poolsize );
601 codepage = st->codepage;
602 pool[0] = codepage & 0xffff;
603 pool[1] = codepage >> 16;
604 if (st->maxcount > 0xffff)
607 *bytes_per_strref = LONG_STR_BYTES;
610 *bytes_per_strref = sizeof(USHORT);
613 for( i=1; i<st->maxcount; i++ )
615 if( !st->strings[i].persistent_refcount )
623 sz = datasize - used;
624 r = msi_id2stringA( st, i, data+used, &sz );
625 if( r != ERROR_SUCCESS )
627 ERR("failed to fetch string\n");
630 if( sz && (sz < (datasize - used ) ) )
634 pool[ n*2 + 1 ] = st->strings[i].persistent_refcount;
645 pool[ n*2 + 2 ] = sz&0xffff;
646 pool[ n*2 + 3 ] = (sz>>16);
650 if( used > datasize )
652 ERR("oops overran %d >= %d\n", used, datasize);
657 if( used != datasize )
659 ERR("oops used %d != datasize %d\n", used, datasize);
663 /* write the streams */
664 r = write_stream_data( storage, szStringData, data, datasize, TRUE );
665 TRACE("Wrote StringData r=%08x\n", r);
668 r = write_stream_data( storage, szStringPool, pool, poolsize, TRUE );
669 TRACE("Wrote StringPool r=%08x\n", r);
682 UINT msi_get_string_table_codepage( const string_table *st )
687 UINT msi_set_string_table_codepage( string_table *st, UINT codepage )
689 if (validate_codepage( codepage ))
691 st->codepage = codepage;
692 return ERROR_SUCCESS;
694 return ERROR_FUNCTION_FAILED;