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wine-wine/dlls/msi/string.c

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/*
* String Table Functions
*
* Copyright 2002-2004, Mike McCormack for CodeWeavers
* Copyright 2007 Robert Shearman for CodeWeavers
* Copyright 2010 Hans Leidekker for CodeWeavers
*
* 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
*/
#define COBJMACROS
#include <stdarg.h>
#include <assert.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wine/debug.h"
#include "msi.h"
#include "msiquery.h"
#include "objbase.h"
#include "objidl.h"
#include "msipriv.h"
#include "winnls.h"
#include "query.h"
WINE_DEFAULT_DEBUG_CHANNEL(msidb);
struct msistring
{
USHORT persistent_refcount;
USHORT nonpersistent_refcount;
WCHAR *data;
int len;
};
struct string_table
{
UINT maxcount; /* the number of strings */
UINT freeslot;
UINT codepage;
UINT sortcount;
struct msistring *strings; /* an array of strings */
UINT *sorted; /* index */
};
static BOOL validate_codepage( UINT codepage )
{
if (codepage != CP_ACP && !IsValidCodePage( codepage ))
{
WARN("invalid codepage %u\n", codepage);
return FALSE;
}
return TRUE;
}
static string_table *init_stringtable( int entries, UINT codepage )
{
string_table *st;
if (!validate_codepage( codepage ))
return NULL;
st = msi_alloc( sizeof (string_table) );
if( !st )
return NULL;
if( entries < 1 )
entries = 1;
st->strings = msi_alloc_zero( sizeof(struct msistring) * entries );
if( !st->strings )
{
msi_free( st );
return NULL;
}
st->sorted = msi_alloc( sizeof (UINT) * entries );
if( !st->sorted )
{
msi_free( st->strings );
msi_free( st );
return NULL;
}
st->maxcount = entries;
st->freeslot = 1;
st->codepage = codepage;
st->sortcount = 0;
return st;
}
VOID msi_destroy_stringtable( string_table *st )
{
UINT i;
for( i=0; i<st->maxcount; i++ )
{
if( st->strings[i].persistent_refcount ||
st->strings[i].nonpersistent_refcount )
msi_free( st->strings[i].data );
}
msi_free( st->strings );
msi_free( st->sorted );
msi_free( st );
}
static int st_find_free_entry( string_table *st )
{
UINT i, sz, *s;
struct msistring *p;
TRACE("%p\n", st);
if( st->freeslot )
{
for( i = st->freeslot; i < st->maxcount; i++ )
if( !st->strings[i].persistent_refcount &&
!st->strings[i].nonpersistent_refcount )
return i;
}
for( i = 1; i < st->maxcount; i++ )
if( !st->strings[i].persistent_refcount &&
!st->strings[i].nonpersistent_refcount )
return i;
/* dynamically resize */
sz = st->maxcount + 1 + st->maxcount/2;
p = msi_realloc_zero( st->strings, sz * sizeof(struct msistring) );
if( !p )
return -1;
s = msi_realloc( st->sorted, sz*sizeof(UINT) );
if( !s )
{
msi_free( p );
return -1;
}
st->strings = p;
st->sorted = s;
st->freeslot = st->maxcount;
st->maxcount = sz;
if( st->strings[st->freeslot].persistent_refcount ||
st->strings[st->freeslot].nonpersistent_refcount )
ERR("oops. expected freeslot to be free...\n");
return st->freeslot;
}
static inline int cmp_string( const WCHAR *str1, int len1, const WCHAR *str2, int len2 )
{
if (len1 < len2) return -1;
else if (len1 > len2) return 1;
while (len1)
{
if (*str1 == *str2) { str1++; str2++; }
else return *str1 - *str2;
len1--;
}
return 0;
}
static int find_insert_index( const string_table *st, UINT string_id )
{
int i, c, low = 0, high = st->sortcount - 1;
while (low <= high)
{
i = (low + high) / 2;
c = cmp_string( st->strings[string_id].data, st->strings[string_id].len,
st->strings[st->sorted[i]].data, st->strings[st->sorted[i]].len );
if (c < 0)
high = i - 1;
else if (c > 0)
low = i + 1;
else
return -1; /* already exists */
}
return high + 1;
}
static void insert_string_sorted( string_table *st, UINT string_id )
{
int i;
i = find_insert_index( st, string_id );
if (i == -1)
return;
memmove( &st->sorted[i] + 1, &st->sorted[i], (st->sortcount - i) * sizeof(UINT) );
st->sorted[i] = string_id;
st->sortcount++;
}
static void set_st_entry( string_table *st, UINT n, WCHAR *str, int len, USHORT refcount,
BOOL persistent )
{
if (persistent)
{
st->strings[n].persistent_refcount = refcount;
st->strings[n].nonpersistent_refcount = 0;
}
else
{
st->strings[n].persistent_refcount = 0;
st->strings[n].nonpersistent_refcount = refcount;
}
st->strings[n].data = str;
st->strings[n].len = len;
insert_string_sorted( st, n );
if( n < st->maxcount )
st->freeslot = n + 1;
}
static UINT string2id( const string_table *st, const char *buffer, UINT *id )
{
int sz;
UINT r = ERROR_INVALID_PARAMETER;
LPWSTR str;
TRACE("Finding string %s in string table\n", debugstr_a(buffer) );
if( buffer[0] == 0 )
{
*id = 0;
return ERROR_SUCCESS;
}
if (!(sz = MultiByteToWideChar( st->codepage, 0, buffer, -1, NULL, 0 )))
return r;
str = msi_alloc( sz*sizeof(WCHAR) );
if( !str )
return ERROR_NOT_ENOUGH_MEMORY;
MultiByteToWideChar( st->codepage, 0, buffer, -1, str, sz );
r = msi_string2id( st, str, sz - 1, id );
msi_free( str );
return r;
}
static int add_string( string_table *st, UINT n, const char *data, UINT len, USHORT refcount, BOOL persistent )
{
LPWSTR str;
int sz;
if( !data || !len )
return 0;
if( n > 0 )
{
if( st->strings[n].persistent_refcount ||
st->strings[n].nonpersistent_refcount )
return -1;
}
else
{
if (string2id( st, data, &n ) == ERROR_SUCCESS)
{
if (persistent)
st->strings[n].persistent_refcount += refcount;
else
st->strings[n].nonpersistent_refcount += refcount;
return n;
}
n = st_find_free_entry( st );
if( n == -1 )
return -1;
}
if( n < 1 )
{
ERR("invalid index adding %s (%d)\n", debugstr_a( data ), n );
return -1;
}
/* allocate a new string */
sz = MultiByteToWideChar( st->codepage, 0, data, len, NULL, 0 );
str = msi_alloc( (sz+1)*sizeof(WCHAR) );
if( !str )
return -1;
MultiByteToWideChar( st->codepage, 0, data, len, str, sz );
str[sz] = 0;
set_st_entry( st, n, str, sz, refcount, persistent );
return n;
}
int msi_add_string( string_table *st, const WCHAR *data, int len, BOOL persistent )
{
UINT n;
LPWSTR str;
if( !data )
return 0;
if (len < 0) len = lstrlenW( data );
if( !data[0] && !len )
return 0;
if (msi_string2id( st, data, len, &n) == ERROR_SUCCESS )
{
if (persistent)
st->strings[n].persistent_refcount++;
else
st->strings[n].nonpersistent_refcount++;
return n;
}
n = st_find_free_entry( st );
if( n == -1 )
return -1;
/* allocate a new string */
TRACE( "%s, n = %d len = %d\n", debugstr_wn(data, len), n, len );
str = msi_alloc( (len+1)*sizeof(WCHAR) );
if( !str )
return -1;
memcpy( str, data, len*sizeof(WCHAR) );
str[len] = 0;
set_st_entry( st, n, str, len, 1, persistent );
return n;
}
/* find the string identified by an id - return null if there's none */
const WCHAR *msi_string_lookup( const string_table *st, UINT id, int *len )
{
if( id == 0 )
{
if (len) *len = 0;
return szEmpty;
}
if( id >= st->maxcount )
return NULL;
if( id && !st->strings[id].persistent_refcount && !st->strings[id].nonpersistent_refcount)
return NULL;
if (len) *len = st->strings[id].len;
return st->strings[id].data;
}
/*
* id2string
*
* [in] st - pointer to the string table
* [in] id - id of the string to retrieve
* [out] buffer - destination of the UTF8 string
* [in/out] sz - number of bytes available in the buffer on input
* number of bytes used on output
*
* Returned string is not nul terminated.
*/
static UINT id2string( const string_table *st, UINT id, char *buffer, UINT *sz )
{
int len, lenW;
const WCHAR *str;
TRACE("Finding string %d of %d\n", id, st->maxcount);
str = msi_string_lookup( st, id, &lenW );
if( !str )
return ERROR_FUNCTION_FAILED;
len = WideCharToMultiByte( st->codepage, 0, str, lenW, NULL, 0, NULL, NULL );
if( *sz < len )
{
*sz = len;
return ERROR_MORE_DATA;
}
*sz = WideCharToMultiByte( st->codepage, 0, str, lenW, buffer, *sz, NULL, NULL );
return ERROR_SUCCESS;
}
/*
* msi_string2id
*
* [in] st - pointer to the string table
* [in] str - string to find in the string table
* [out] id - id of the string, if found
*/
UINT msi_string2id( const string_table *st, const WCHAR *str, int len, UINT *id )
{
int i, c, low = 0, high = st->sortcount - 1;
if (len < 0) len = lstrlenW( str );
while (low <= high)
{
i = (low + high) / 2;
c = cmp_string( str, len, st->strings[st->sorted[i]].data, st->strings[st->sorted[i]].len );
if (c < 0)
high = i - 1;
else if (c > 0)
low = i + 1;
else
{
*id = st->sorted[i];
return ERROR_SUCCESS;
}
}
return ERROR_INVALID_PARAMETER;
}
static void string_totalsize( const string_table *st, UINT *datasize, UINT *poolsize )
{
UINT i, len, holesize;
if( st->strings[0].data || st->strings[0].persistent_refcount || st->strings[0].nonpersistent_refcount)
ERR("oops. element 0 has a string\n");
*poolsize = 4;
*datasize = 0;
holesize = 0;
for( i=1; i<st->maxcount; i++ )
{
if( !st->strings[i].persistent_refcount )
{
TRACE("[%u] nonpersistent = %s\n", i, debugstr_wn(st->strings[i].data, st->strings[i].len));
(*poolsize) += 4;
}
else if( st->strings[i].data )
{
TRACE("[%u] = %s\n", i, debugstr_wn(st->strings[i].data, st->strings[i].len));
len = WideCharToMultiByte( st->codepage, 0, st->strings[i].data, st->strings[i].len + 1,
NULL, 0, NULL, NULL);
if( len )
len--;
(*datasize) += len;
if (len>0xffff)
(*poolsize) += 4;
(*poolsize) += holesize + 4;
holesize = 0;
}
else
holesize += 4;
}
TRACE("data %u pool %u codepage %x\n", *datasize, *poolsize, st->codepage );
}
HRESULT msi_init_string_table( IStorage *stg )
{
USHORT zero[2] = { 0, 0 };
UINT ret;
/* create the StringPool stream... add the zero string to it*/
ret = write_stream_data(stg, szStringPool, zero, sizeof zero, TRUE);
if (ret != ERROR_SUCCESS)
return E_FAIL;
/* create the StringData stream... make it zero length */
ret = write_stream_data(stg, szStringData, NULL, 0, TRUE);
if (ret != ERROR_SUCCESS)
return E_FAIL;
return S_OK;
}
string_table *msi_load_string_table( IStorage *stg, UINT *bytes_per_strref )
{
string_table *st = NULL;
CHAR *data = NULL;
USHORT *pool = NULL;
UINT r, datasize = 0, poolsize = 0, codepage;
DWORD i, count, offset, len, n, refs;
r = read_stream_data( stg, szStringPool, TRUE, (BYTE **)&pool, &poolsize );
if( r != ERROR_SUCCESS)
goto end;
r = read_stream_data( stg, szStringData, TRUE, (BYTE **)&data, &datasize );
if( r != ERROR_SUCCESS)
goto end;
if ( (poolsize > 4) && (pool[1] & 0x8000) )
*bytes_per_strref = LONG_STR_BYTES;
else
*bytes_per_strref = sizeof(USHORT);
count = poolsize/4;
if( poolsize > 4 )
codepage = pool[0] | ( (pool[1] & ~0x8000) << 16 );
else
codepage = CP_ACP;
st = init_stringtable( count, codepage );
if (!st)
goto end;
offset = 0;
n = 1;
i = 1;
while( i<count )
{
/* the string reference count is always the second word */
refs = pool[i*2+1];
/* empty entries have two zeros, still have a string id */
if (pool[i*2] == 0 && refs == 0)
{
i++;
n++;
continue;
}
/*
* If a string is over 64k, the previous string entry is made null
* and its the high word of the length is inserted in the null string's
* reference count field.
*/
if( pool[i*2] == 0)
{
len = (pool[i*2+3] << 16) + pool[i*2+2];
i += 2;
}
else
{
len = pool[i*2];
i += 1;
}
if ( (offset + len) > datasize )
{
ERR("string table corrupt?\n");
break;
}
r = add_string( st, n, data+offset, len, refs, TRUE );
if( r != n )
ERR("Failed to add string %d\n", n );
n++;
offset += len;
}
if ( datasize != offset )
ERR("string table load failed! (%08x != %08x), please report\n", datasize, offset );
TRACE("Loaded %d strings\n", count);
end:
msi_free( pool );
msi_free( data );
return st;
}
UINT msi_save_string_table( const string_table *st, IStorage *storage, UINT *bytes_per_strref )
{
UINT i, datasize = 0, poolsize = 0, sz, used, r, codepage, n;
UINT ret = ERROR_FUNCTION_FAILED;
CHAR *data = NULL;
USHORT *pool = NULL;
TRACE("\n");
/* construct the new table in memory first */
string_totalsize( st, &datasize, &poolsize );
TRACE("%u %u %u\n", st->maxcount, datasize, poolsize );
pool = msi_alloc( poolsize );
if( ! pool )
{
WARN("Failed to alloc pool %d bytes\n", poolsize );
goto err;
}
data = msi_alloc( datasize );
if( ! data )
{
WARN("Failed to alloc data %d bytes\n", datasize );
goto err;
}
used = 0;
codepage = st->codepage;
pool[0] = codepage & 0xffff;
pool[1] = codepage >> 16;
if (st->maxcount > 0xffff)
{
pool[1] |= 0x8000;
*bytes_per_strref = LONG_STR_BYTES;
}
else
*bytes_per_strref = sizeof(USHORT);
n = 1;
for( i=1; i<st->maxcount; i++ )
{
if( !st->strings[i].persistent_refcount )
{
pool[ n*2 ] = 0;
pool[ n*2 + 1] = 0;
n++;
continue;
}
sz = datasize - used;
r = id2string( st, i, data+used, &sz );
if( r != ERROR_SUCCESS )
{
ERR("failed to fetch string\n");
sz = 0;
}
if (sz)
pool[ n*2 + 1 ] = st->strings[i].persistent_refcount;
else
pool[ n*2 + 1 ] = 0;
if (sz < 0x10000)
{
pool[ n*2 ] = sz;
n++;
}
else
{
pool[ n*2 ] = 0;
pool[ n*2 + 2 ] = sz&0xffff;
pool[ n*2 + 3 ] = (sz>>16);
n += 2;
}
used += sz;
if( used > datasize )
{
ERR("oops overran %d >= %d\n", used, datasize);
goto err;
}
}
if( used != datasize )
{
ERR("oops used %d != datasize %d\n", used, datasize);
goto err;
}
/* write the streams */
r = write_stream_data( storage, szStringData, data, datasize, TRUE );
TRACE("Wrote StringData r=%08x\n", r);
if( r )
goto err;
r = write_stream_data( storage, szStringPool, pool, poolsize, TRUE );
TRACE("Wrote StringPool r=%08x\n", r);
if( r )
goto err;
ret = ERROR_SUCCESS;
err:
msi_free( data );
msi_free( pool );
return ret;
}
UINT msi_get_string_table_codepage( const string_table *st )
{
return st->codepage;
}
UINT msi_set_string_table_codepage( string_table *st, UINT codepage )
{
if (validate_codepage( codepage ))
{
st->codepage = codepage;
return ERROR_SUCCESS;
}
return ERROR_FUNCTION_FAILED;
}
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