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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
*
* 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 "wine/unicode.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);
#define HASH_SIZE 0x101
#define LONG_STR_BYTES 3
typedef struct _msistring
{
int hash_next;
UINT persistent_refcount;
UINT nonpersistent_refcount;
LPWSTR str;
} msistring;
struct string_table
{
UINT maxcount; /* the number of strings */
UINT freeslot;
UINT codepage;
int hash[HASH_SIZE];
msistring *strings; /* an array of strings (in the tree) */
};
static UINT msistring_makehash( const WCHAR *str )
{
UINT hash = 0;
if (str==NULL)
return hash;
while( *str )
{
hash ^= *str++;
hash *= 53;
hash = (hash<<5) | (hash>>27);
}
return hash % HASH_SIZE;
}
static string_table *init_stringtable( int entries, UINT codepage )
{
string_table *st;
int i;
if (codepage != CP_ACP && !IsValidCodePage(codepage))
{
ERR("invalid codepage %d\n", codepage);
return NULL;
}
st = msi_alloc( sizeof (string_table) );
if( !st )
return NULL;
if( entries < 1 )
entries = 1;
st->strings = msi_alloc_zero( sizeof (msistring) * entries );
if( !st->strings )
{
msi_free( st );
return NULL;
}
st->maxcount = entries;
st->freeslot = 1;
st->codepage = codepage;
for( i=0; i<HASH_SIZE; i++ )
st->hash[i] = -1;
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].str );
}
msi_free( st->strings );
msi_free( st );
}
static int st_find_free_entry( string_table *st )
{
UINT i, sz;
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(msistring) );
if( !p )
return -1;
st->strings = p;
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 void set_st_entry( string_table *st, UINT n, LPWSTR str, UINT refcount, enum StringPersistence persistence )
{
UINT hash = msistring_makehash( str );
if (persistence == StringPersistent)
{
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].str = str;
st->strings[n].hash_next = st->hash[hash];
st->hash[hash] = n;
if( n < st->maxcount )
st->freeslot = n + 1;
}
static int msi_addstring( string_table *st, UINT n, const CHAR *data, int len, UINT refcount, enum StringPersistence persistence )
{
LPWSTR str;
int sz;
if( !data )
return 0;
if( !data[0] )
return 0;
if( n > 0 )
{
if( st->strings[n].persistent_refcount ||
st->strings[n].nonpersistent_refcount )
return -1;
}
else
{
if( ERROR_SUCCESS == msi_string2idA( st, data, &n ) )
{
if (persistence == StringPersistent)
st->strings[n].persistent_refcount += refcount;
else
st->strings[n].nonpersistent_refcount += refcount;
return n;
}
n = st_find_free_entry( st );
if( n < 0 )
return -1;
}
if( n < 1 )
{
ERR("invalid index adding %s (%d)\n", debugstr_a( data ), n );
return -1;
}
/* allocate a new string */
if( len < 0 )
len = strlen(data);
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, refcount, persistence );
return n;
}
int msi_addstringW( string_table *st, UINT n, const WCHAR *data, int len, UINT refcount, enum StringPersistence persistence )
{
LPWSTR str;
/* TRACE("[%2d] = %s\n", string_no, debugstr_an(data,len) ); */
if( !data )
return 0;
if( !data[0] )
return 0;
if( n > 0 )
{
if( st->strings[n].persistent_refcount ||
st->strings[n].nonpersistent_refcount )
return -1;
}
else
{
if( ERROR_SUCCESS == msi_string2idW( st, data, &n ) )
{
if (persistence == StringPersistent)
st->strings[n].persistent_refcount += refcount;
else
st->strings[n].nonpersistent_refcount += refcount;
return n;
}
n = st_find_free_entry( st );
if( n < 0 )
return -1;
}
if( n < 1 )
{
ERR("invalid index adding %s (%d)\n", debugstr_w( data ), n );
return -1;
}
/* allocate a new string */
if(len<0)
len = strlenW(data);
TRACE("%s, n = %d len = %d\n", debugstr_w(data), 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, refcount, persistence );
return n;
}
/* find the string identified by an id - return null if there's none */
const WCHAR *msi_string_lookup_id( const string_table *st, UINT id )
{
static const WCHAR zero[] = { 0 };
if( id == 0 )
return zero;
if( id >= st->maxcount )
return NULL;
if( id && !st->strings[id].persistent_refcount && !st->strings[id].nonpersistent_refcount)
return NULL;
return st->strings[id].str;
}
/*
* msi_id2stringW
*
* [in] st - pointer to the string table
* [in] id - id of the string to retrieve
* [out] buffer - destination of the string
* [in/out] sz - number of bytes available in the buffer on input
* number of bytes used on output
*
* The size includes the terminating nul character. Short buffers
* will be filled, but not nul terminated.
*/
UINT msi_id2stringW( const string_table *st, UINT id, LPWSTR buffer, UINT *sz )
{
UINT len;
const WCHAR *str;
TRACE("Finding string %d of %d\n", id, st->maxcount);
str = msi_string_lookup_id( st, id );
if( !str )
return ERROR_FUNCTION_FAILED;
len = strlenW( str ) + 1;
if( !buffer )
{
*sz = len;
return ERROR_SUCCESS;
}
if( *sz < len )
*sz = len;
memcpy( buffer, str, (*sz)*sizeof(WCHAR) );
*sz = len;
return ERROR_SUCCESS;
}
/*
* msi_id2stringA
*
* [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
*
* The size includes the terminating nul character. Short buffers
* will be filled, but not nul terminated.
*/
UINT msi_id2stringA( const string_table *st, UINT id, LPSTR buffer, UINT *sz )
{
UINT len;
const WCHAR *str;
int n;
TRACE("Finding string %d of %d\n", id, st->maxcount);
str = msi_string_lookup_id( st, id );
if( !str )
return ERROR_FUNCTION_FAILED;
len = WideCharToMultiByte( st->codepage, 0, str, -1, NULL, 0, NULL, NULL );
if( !buffer )
{
*sz = len;
return ERROR_SUCCESS;
}
if( len > *sz )
{
n = strlenW( str ) + 1;
while( n && (len > *sz) )
len = WideCharToMultiByte( st->codepage, 0,
str, --n, NULL, 0, NULL, NULL );
}
else
n = -1;
*sz = WideCharToMultiByte( st->codepage, 0, str, n, buffer, len, NULL, NULL );
return ERROR_SUCCESS;
}
/*
* msi_string2idW
*
* [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_string2idW( const string_table *st, LPCWSTR str, UINT *id )
{
UINT n, hash = msistring_makehash( str );
msistring *se = st->strings;
for (n = st->hash[hash]; n != -1; n = st->strings[n].hash_next )
{
if ((str == se[n].str) || !lstrcmpW(str, se[n].str))
{
*id = n;
return ERROR_SUCCESS;
}
}
return ERROR_INVALID_PARAMETER;
}
UINT msi_string2idA( const string_table *st, LPCSTR buffer, UINT *id )
{
DWORD 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;
}
sz = MultiByteToWideChar( st->codepage, 0, buffer, -1, NULL, 0 );
if( sz <= 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_string2idW( st, str, id );
msi_free( str );
return r;
}
UINT msi_strcmp( const string_table *st, UINT lval, UINT rval, UINT *res )
{
const WCHAR *l_str, *r_str;
l_str = msi_string_lookup_id( st, lval );
if( !l_str )
return ERROR_INVALID_PARAMETER;
r_str = msi_string_lookup_id( st, rval );
if( !r_str )
return ERROR_INVALID_PARAMETER;
/* does this do the right thing for all UTF-8 strings? */
*res = strcmpW( l_str, r_str );
return ERROR_SUCCESS;
}
static void string_totalsize( const string_table *st, UINT *datasize, UINT *poolsize )
{
UINT i, len, max, holesize;
if( st->strings[0].str || st->strings[0].persistent_refcount || st->strings[0].nonpersistent_refcount)
ERR("oops. element 0 has a string\n");
*poolsize = 4;
*datasize = 0;
max = 1;
holesize = 0;
for( i=1; i<st->maxcount; i++ )
{
if( !st->strings[i].persistent_refcount )
continue;
if( st->strings[i].str )
{
TRACE("[%u] = %s\n", i, debugstr_w(st->strings[i].str));
len = WideCharToMultiByte( st->codepage, 0,
st->strings[i].str, -1, NULL, 0, NULL, NULL);
if( len )
len--;
(*datasize) += len;
if (len>0xffff)
(*poolsize) += 4;
max = i + 1;
(*poolsize) += holesize + 4;
holesize = 0;
}
else
holesize += 4;
}
TRACE("data %u pool %u codepage %x\n", *datasize, *poolsize, st->codepage );
}
static const WCHAR szStringData[] = {
'_','S','t','r','i','n','g','D','a','t','a',0 };
static const WCHAR szStringPool[] = {
'_','S','t','r','i','n','g','P','o','o','l',0 };
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 = msi_addstring( st, n, data+offset, len, refs, StringPersistent );
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 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", poolsize );
goto err;
}
used = 0;
codepage = st->codepage;
pool[0]=codepage&0xffff;
pool[1]=(codepage>>16);
n = 1;
for( i=1; i<st->maxcount; i++ )
{
if( !st->strings[i].persistent_refcount )
continue;
sz = datasize - used;
r = msi_id2stringA( st, i, data+used, &sz );
if( r != ERROR_SUCCESS )
{
ERR("failed to fetch string\n");
sz = 0;
}
if( sz && (sz < (datasize - used ) ) )
sz--;
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;
}
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