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Sweden-Number/dlls/msi/where.c

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/*
* Implementation of the Microsoft Installer (msi.dll)
*
* Copyright 2002 Mike McCormack 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
*/
#include <stdarg.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);
#define MSI_HASH_TABLE_SIZE 37
typedef struct tagMSIHASHENTRY
{
struct tagMSIHASHENTRY *next;
UINT value;
UINT row;
} MSIHASHENTRY;
/* below is the query interface to a table */
typedef struct tagMSIWHEREVIEW
{
MSIVIEW view;
MSIDATABASE *db;
MSIVIEW *table;
UINT row_count;
MSIHASHENTRY **reorder;
struct expr *cond;
UINT rec_index;
} MSIWHEREVIEW;
static void free_hash_table(MSIHASHENTRY **table)
{
MSIHASHENTRY *new, *old;
int i;
if (!table)
return;
for (i = 0; i < MSI_HASH_TABLE_SIZE; i++)
{
new = table[i];
while (new)
{
old = new;
new = old->next;
msi_free(old);
}
table[i] = NULL;
}
msi_free(table);
}
static UINT find_entry_in_hash(MSIHASHENTRY **table, UINT row, UINT *val)
{
MSIHASHENTRY *entry;
if (!table)
return ERROR_SUCCESS;
if (!(entry = table[row % MSI_HASH_TABLE_SIZE]))
{
WARN("Row not found in hash table!\n");
return ERROR_FUNCTION_FAILED;
}
while (entry && entry->row != row)
entry = entry->next;
if (entry) *val = entry->value;
return ERROR_SUCCESS;
}
static UINT add_entry_to_hash(MSIHASHENTRY **table, UINT row, UINT val)
{
MSIHASHENTRY *new = msi_alloc(sizeof(MSIHASHENTRY));
MSIHASHENTRY *prev;
if (!new)
return ERROR_OUTOFMEMORY;
new->next = NULL;
new->value = val;
new->row = row;
prev = table[row % MSI_HASH_TABLE_SIZE];
if (prev)
new->next = prev;
table[row % MSI_HASH_TABLE_SIZE] = new;
return ERROR_SUCCESS;
}
static UINT WHERE_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT r;
TRACE("%p %d %d %p\n", wv, row, col, val );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
r = find_entry_in_hash(wv->reorder, row, &row);
if (r != ERROR_SUCCESS)
return r;
return wv->table->ops->fetch_int( wv->table, row, col, val );
}
static UINT WHERE_fetch_stream( struct tagMSIVIEW *view, UINT row, UINT col, IStream **stm )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT r;
TRACE("%p %d %d %p\n", wv, row, col, stm );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
r = find_entry_in_hash(wv->reorder, row, &row);
if (r != ERROR_SUCCESS)
return r;
return wv->table->ops->fetch_stream( wv->table, row, col, stm );
}
static UINT WHERE_get_row( struct tagMSIVIEW *view, UINT row, MSIRECORD **rec )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW *)view;
UINT r;
TRACE("%p %d %p\n", wv, row, rec );
if (!wv->table)
return ERROR_FUNCTION_FAILED;
if (row > wv->row_count)
return ERROR_NO_MORE_ITEMS;
r = find_entry_in_hash(wv->reorder, row, &row);
if (r != ERROR_SUCCESS)
return r;
return wv->table->ops->get_row(view, row, rec);
}
static UINT WHERE_set_row( struct tagMSIVIEW *view, UINT row, MSIRECORD *rec, UINT mask )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT r;
TRACE("%p %d %p %08x\n", wv, row, rec, mask );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
r = find_entry_in_hash(wv->reorder, row, &row);
if (r != ERROR_SUCCESS)
return r;
return wv->table->ops->set_row( wv->table, row, rec, mask );
}
static UINT WHERE_delete_row(struct tagMSIVIEW *view, UINT row)
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW *)view;
UINT r;
TRACE("(%p %d)\n", view, row);
if ( !wv->table )
return ERROR_FUNCTION_FAILED;
if ( row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
r = find_entry_in_hash( wv->reorder, row, &row );
if ( r != ERROR_SUCCESS )
return r;
return wv->table->ops->delete_row( wv->table, row );
}
static INT INT_evaluate_binary( INT lval, UINT op, INT rval )
{
switch( op )
{
case OP_EQ:
return ( lval == rval );
case OP_AND:
return ( lval && rval );
case OP_OR:
return ( lval || rval );
case OP_GT:
return ( lval > rval );
case OP_LT:
return ( lval < rval );
case OP_LE:
return ( lval <= rval );
case OP_GE:
return ( lval >= rval );
case OP_NE:
return ( lval != rval );
default:
ERR("Unknown operator %d\n", op );
}
return 0;
}
static INT INT_evaluate_unary( INT lval, UINT op )
{
switch( op )
{
case OP_ISNULL:
return ( !lval );
case OP_NOTNULL:
return ( lval );
default:
ERR("Unknown operator %d\n", op );
}
return 0;
}
static const WCHAR *STRING_evaluate( MSIWHEREVIEW *wv, UINT row,
const struct expr *expr,
const MSIRECORD *record )
{
UINT val = 0, r;
switch( expr->type )
{
case EXPR_COL_NUMBER_STRING:
r = wv->table->ops->fetch_int( wv->table, row, expr->u.col_number, &val );
if( r != ERROR_SUCCESS )
return NULL;
return msi_string_lookup_id( wv->db->strings, val );
case EXPR_SVAL:
return expr->u.sval;
case EXPR_WILDCARD:
return MSI_RecordGetString( record, ++wv->rec_index );
default:
ERR("Invalid expression type\n");
break;
}
return NULL;
}
static UINT STRCMP_Evaluate( MSIWHEREVIEW *wv, UINT row, const struct expr *cond,
INT *val, const MSIRECORD *record )
{
int sr;
const WCHAR *l_str, *r_str;
l_str = STRING_evaluate( wv, row, cond->u.expr.left, record );
r_str = STRING_evaluate( wv, row, cond->u.expr.right, record );
if( l_str == r_str ||
((!l_str || !*l_str) && (!r_str || !*r_str)) )
sr = 0;
else if( l_str && ! r_str )
sr = 1;
else if( r_str && ! l_str )
sr = -1;
else
sr = lstrcmpW( l_str, r_str );
*val = ( cond->u.expr.op == OP_EQ && ( sr == 0 ) ) ||
( cond->u.expr.op == OP_NE && ( sr != 0 ) ) ||
( cond->u.expr.op == OP_LT && ( sr < 0 ) ) ||
( cond->u.expr.op == OP_GT && ( sr > 0 ) );
return ERROR_SUCCESS;
}
static UINT WHERE_evaluate( MSIWHEREVIEW *wv, UINT row,
struct expr *cond, INT *val, MSIRECORD *record )
{
UINT r, tval;
INT lval, rval;
if( !cond )
return ERROR_SUCCESS;
switch( cond->type )
{
case EXPR_COL_NUMBER:
r = wv->table->ops->fetch_int( wv->table, row, cond->u.col_number, &tval );
*val = tval - 0x8000;
return ERROR_SUCCESS;
case EXPR_COL_NUMBER32:
r = wv->table->ops->fetch_int( wv->table, row, cond->u.col_number, &tval );
*val = tval - 0x80000000;
return r;
case EXPR_UVAL:
*val = cond->u.uval;
return ERROR_SUCCESS;
case EXPR_COMPLEX:
r = WHERE_evaluate( wv, row, cond->u.expr.left, &lval, record );
if( r != ERROR_SUCCESS )
return r;
r = WHERE_evaluate( wv, row, cond->u.expr.right, &rval, record );
if( r != ERROR_SUCCESS )
return r;
*val = INT_evaluate_binary( lval, cond->u.expr.op, rval );
return ERROR_SUCCESS;
case EXPR_UNARY:
r = wv->table->ops->fetch_int( wv->table, row, cond->u.expr.left->u.col_number, &tval );
if( r != ERROR_SUCCESS )
return r;
*val = INT_evaluate_unary( tval, cond->u.expr.op );
return ERROR_SUCCESS;
case EXPR_STRCMP:
return STRCMP_Evaluate( wv, row, cond, val, record );
case EXPR_WILDCARD:
*val = MSI_RecordGetInteger( record, ++wv->rec_index );
return ERROR_SUCCESS;
default:
ERR("Invalid expression type\n");
break;
}
return ERROR_SUCCESS;
}
static UINT WHERE_execute( struct tagMSIVIEW *view, MSIRECORD *record )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT count = 0, r, i;
INT val;
MSIVIEW *table = wv->table;
TRACE("%p %p\n", wv, record);
if( !table )
return ERROR_FUNCTION_FAILED;
r = table->ops->execute( table, record );
if( r != ERROR_SUCCESS )
return r;
r = table->ops->get_dimensions( table, &count, NULL );
if( r != ERROR_SUCCESS )
return r;
free_hash_table(wv->reorder);
wv->reorder = msi_alloc_zero(MSI_HASH_TABLE_SIZE * sizeof(MSIHASHENTRY *));
if( !wv->reorder )
return ERROR_OUTOFMEMORY;
wv->row_count = 0;
if (wv->cond->type == EXPR_STRCMP)
{
MSIITERHANDLE handle = NULL;
UINT row, value, col;
struct expr *col_cond = wv->cond->u.expr.left;
struct expr *val_cond = wv->cond->u.expr.right;
/* swap conditionals */
if (col_cond->type != EXPR_COL_NUMBER_STRING)
{
val_cond = wv->cond->u.expr.left;
col_cond = wv->cond->u.expr.right;
}
if ((col_cond->type == EXPR_COL_NUMBER_STRING) && (val_cond->type == EXPR_SVAL))
{
col = col_cond->u.col_number;
/* special case for "" - translate it into nil */
if (!val_cond->u.sval[0])
value = 0;
else
{
r = msi_string2idW(wv->db->strings, val_cond->u.sval, &value);
if (r != ERROR_SUCCESS)
{
TRACE("no id for %s, assuming it doesn't exist in the table\n", debugstr_w(wv->cond->u.expr.right->u.sval));
return ERROR_SUCCESS;
}
}
do
{
r = table->ops->find_matching_rows(table, col, value, &row, &handle);
if (r == ERROR_SUCCESS)
add_entry_to_hash(wv->reorder, wv->row_count++, row);
} while (r == ERROR_SUCCESS);
if (r == ERROR_NO_MORE_ITEMS)
return ERROR_SUCCESS;
else
return r;
}
/* else fallback to slow case */
}
for( i=0; i<count; i++ )
{
val = 0;
wv->rec_index = 0;
r = WHERE_evaluate( wv, i, wv->cond, &val, record );
if( r != ERROR_SUCCESS )
return r;
if( val )
add_entry_to_hash( wv->reorder, wv->row_count++, i );
}
return ERROR_SUCCESS;
}
static UINT WHERE_close( struct tagMSIVIEW *view )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p\n", wv );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
return wv->table->ops->close( wv->table );
}
static UINT WHERE_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %p %p\n", wv, rows, cols );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
if( rows )
{
if( !wv->reorder )
return ERROR_FUNCTION_FAILED;
*rows = wv->row_count;
}
return wv->table->ops->get_dimensions( wv->table, NULL, cols );
}
static UINT WHERE_get_column_info( struct tagMSIVIEW *view,
UINT n, LPWSTR *name, UINT *type )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %p %p\n", wv, n, name, type );
if( !wv->table )
return ERROR_FUNCTION_FAILED;
return wv->table->ops->get_column_info( wv->table, n, name, type );
}
static UINT WHERE_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
MSIRECORD *rec, UINT row )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p %d %p\n", wv, eModifyMode, rec);
find_entry_in_hash(wv->reorder, row - 1, &row);
row++;
return wv->table->ops->modify( wv->table, eModifyMode, rec, row );
}
static UINT WHERE_delete( struct tagMSIVIEW *view )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
TRACE("%p\n", wv );
if( wv->table )
wv->table->ops->delete( wv->table );
wv->table = 0;
free_hash_table(wv->reorder);
wv->reorder = NULL;
wv->row_count = 0;
msiobj_release( &wv->db->hdr );
msi_free( wv );
return ERROR_SUCCESS;
}
static UINT WHERE_find_matching_rows( struct tagMSIVIEW *view, UINT col,
UINT val, UINT *row, MSIITERHANDLE *handle )
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW*)view;
UINT r;
TRACE("%p, %d, %u, %p\n", view, col, val, *handle);
if( !wv->table )
return ERROR_FUNCTION_FAILED;
r = wv->table->ops->find_matching_rows( wv->table, col, val, row, handle );
if (r != ERROR_SUCCESS)
return r;
if( *row > wv->row_count )
return ERROR_NO_MORE_ITEMS;
return find_entry_in_hash(wv->reorder, *row, row);
}
static UINT WHERE_sort(struct tagMSIVIEW *view, column_info *columns)
{
MSIWHEREVIEW *wv = (MSIWHEREVIEW *)view;
TRACE("%p %p\n", view, columns);
return wv->table->ops->sort(wv->table, columns);
}
static const MSIVIEWOPS where_ops =
{
WHERE_fetch_int,
WHERE_fetch_stream,
WHERE_get_row,
WHERE_set_row,
NULL,
WHERE_delete_row,
WHERE_execute,
WHERE_close,
WHERE_get_dimensions,
WHERE_get_column_info,
WHERE_modify,
WHERE_delete,
WHERE_find_matching_rows,
NULL,
NULL,
NULL,
NULL,
WHERE_sort,
};
static UINT WHERE_VerifyCondition( MSIDATABASE *db, MSIVIEW *table, struct expr *cond,
UINT *valid )
{
UINT r, val = 0;
switch( cond->type )
{
case EXPR_COLUMN:
r = VIEW_find_column( table, cond->u.column, &val );
if( r == ERROR_SUCCESS )
{
UINT type = 0;
r = table->ops->get_column_info( table, val, NULL, &type );
if( r == ERROR_SUCCESS )
{
if (type&MSITYPE_STRING)
cond->type = EXPR_COL_NUMBER_STRING;
else if ((type&0xff) == 4)
cond->type = EXPR_COL_NUMBER32;
else
cond->type = EXPR_COL_NUMBER;
cond->u.col_number = val;
*valid = 1;
}
else
*valid = 0;
}
else
{
*valid = 0;
WARN("Couldn't find column %s\n", debugstr_w( cond->u.column ) );
}
break;
case EXPR_COMPLEX:
r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
if( r != ERROR_SUCCESS )
return r;
if( !*valid )
return ERROR_SUCCESS;
r = WHERE_VerifyCondition( db, table, cond->u.expr.right, valid );
if( r != ERROR_SUCCESS )
return r;
/* check the type of the comparison */
if( ( cond->u.expr.left->type == EXPR_SVAL ) ||
( cond->u.expr.left->type == EXPR_COL_NUMBER_STRING ) ||
( cond->u.expr.right->type == EXPR_SVAL ) ||
( cond->u.expr.right->type == EXPR_COL_NUMBER_STRING ) )
{
switch( cond->u.expr.op )
{
case OP_EQ:
case OP_GT:
case OP_LT:
case OP_NE:
break;
default:
*valid = FALSE;
return ERROR_INVALID_PARAMETER;
}
/* FIXME: check we're comparing a string to a column */
cond->type = EXPR_STRCMP;
}
break;
case EXPR_UNARY:
if ( cond->u.expr.left->type != EXPR_COLUMN )
{
*valid = FALSE;
return ERROR_INVALID_PARAMETER;
}
r = WHERE_VerifyCondition( db, table, cond->u.expr.left, valid );
if( r != ERROR_SUCCESS )
return r;
break;
case EXPR_IVAL:
*valid = 1;
cond->type = EXPR_UVAL;
cond->u.uval = cond->u.ival;
break;
case EXPR_WILDCARD:
*valid = 1;
break;
case EXPR_SVAL:
*valid = 1;
break;
default:
ERR("Invalid expression type\n");
*valid = 0;
break;
}
return ERROR_SUCCESS;
}
UINT WHERE_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table,
struct expr *cond )
{
MSIWHEREVIEW *wv = NULL;
UINT count = 0, r, valid = 0;
TRACE("%p\n", table );
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
{
ERR("can't get table dimensions\n");
return r;
}
if( cond )
{
r = WHERE_VerifyCondition( db, table, cond, &valid );
if( r != ERROR_SUCCESS )
return r;
if( !valid )
return ERROR_FUNCTION_FAILED;
}
wv = msi_alloc_zero( sizeof *wv );
if( !wv )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
wv->view.ops = &where_ops;
msiobj_addref( &db->hdr );
wv->db = db;
wv->table = table;
wv->row_count = 0;
wv->reorder = NULL;
wv->cond = cond;
wv->rec_index = 0;
*view = (MSIVIEW*) wv;
return ERROR_SUCCESS;
}
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