Sweden-Number/dlls/msi/order.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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(msi);
/* below is the query interface to a table */
typedef struct tagMSIORDERVIEW
{
MSIVIEW view;
MSIDATABASE *db;
MSIVIEW *table;
UINT *reorder;
UINT num_cols;
UINT cols[1];
} MSIORDERVIEW;
static UINT ORDER_compare( MSIORDERVIEW *ov, UINT a, UINT b, UINT *swap )
{
UINT r, i, a_val = 0, b_val = 0;
*swap = 0;
for( i=0; i<ov->num_cols; i++ )
{
r = ov->table->ops->fetch_int( ov->table, a, ov->cols[i], &a_val );
if( r != ERROR_SUCCESS )
return r;
r = ov->table->ops->fetch_int( ov->table, b, ov->cols[i], &b_val );
if( r != ERROR_SUCCESS )
return r;
if( a_val != b_val )
{
if( a_val > b_val )
*swap = 1;
break;
}
}
return ERROR_SUCCESS;
}
static UINT ORDER_mergesort( MSIORDERVIEW *ov, UINT left, UINT right )
{
UINT r, centre = (left + right)/2, temp, swap = 0, i, j;
UINT *array = ov->reorder;
if( left == right )
return ERROR_SUCCESS;
/* sort the left half */
r = ORDER_mergesort( ov, left, centre );
if( r != ERROR_SUCCESS )
return r;
/* sort the right half */
r = ORDER_mergesort( ov, centre+1, right );
if( r != ERROR_SUCCESS )
return r;
for( i=left, j=centre+1; (i<=centre) && (j<=right); i++ )
{
r = ORDER_compare( ov, array[i], array[j], &swap );
if( r != ERROR_SUCCESS )
return r;
if( swap )
{
temp = array[j];
memmove( &array[i+1], &array[i], (j-i)*sizeof (UINT) );
array[i] = temp;
j++;
centre++;
}
}
return ERROR_SUCCESS;
}
static UINT ORDER_verify( MSIORDERVIEW *ov, UINT num_rows )
{
UINT i, swap, r;
for( i=1; i<num_rows; i++ )
{
r = ORDER_compare( ov, ov->reorder[i-1], ov->reorder[i], &swap );
if( r != ERROR_SUCCESS )
return r;
if( !swap )
continue;
ERR("Bad order! %d\n", i);
return ERROR_FUNCTION_FAILED;
}
return ERROR_SUCCESS;
}
static UINT ORDER_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p %d %d %p\n", ov, row, col, val );
if( !ov->table )
return ERROR_FUNCTION_FAILED;
row = ov->reorder[ row ];
return ov->table->ops->fetch_int( ov->table, row, col, val );
}
static UINT ORDER_execute( struct tagMSIVIEW *view, MSIHANDLE record )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
UINT r, num_rows = 0, i;
TRACE("%p %ld\n", ov, record);
if( !ov->table )
return ERROR_FUNCTION_FAILED;
r = ov->table->ops->execute( ov->table, record );
if( r != ERROR_SUCCESS )
return r;
r = ov->table->ops->get_dimensions( ov->table, &num_rows, NULL );
if( r != ERROR_SUCCESS )
return r;
ov->reorder = HeapAlloc( GetProcessHeap(), 0, num_rows*sizeof(UINT) );
if( !ov->reorder )
return ERROR_FUNCTION_FAILED;
for( i=0; i<num_rows; i++ )
ov->reorder[i] = i;
r = ORDER_mergesort( ov, 0, num_rows - 1 );
if( r != ERROR_SUCCESS )
return r;
r = ORDER_verify( ov, num_rows );
if( r != ERROR_SUCCESS )
return r;
return ERROR_SUCCESS;
}
static UINT ORDER_close( struct tagMSIVIEW *view )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p\n", ov );
if( !ov->table )
return ERROR_FUNCTION_FAILED;
if( ov->reorder )
HeapFree( GetProcessHeap(), 0, ov->reorder );
ov->reorder = NULL;
return ov->table->ops->close( ov->table );
}
static UINT ORDER_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p %p %p\n", ov, rows, cols );
if( !ov->table )
return ERROR_FUNCTION_FAILED;
return ov->table->ops->get_dimensions( ov->table, rows, cols );
}
static UINT ORDER_get_column_info( struct tagMSIVIEW *view,
UINT n, LPWSTR *name, UINT *type )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p %d %p %p\n", ov, n, name, type );
if( !ov->table )
return ERROR_FUNCTION_FAILED;
return ov->table->ops->get_column_info( ov->table, n, name, type );
}
static UINT ORDER_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode, MSIHANDLE hrec)
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p %d %ld\n", ov, eModifyMode, hrec );
if( !ov->table )
return ERROR_FUNCTION_FAILED;
return ov->table->ops->modify( ov->table, eModifyMode, hrec );
}
static UINT ORDER_delete( struct tagMSIVIEW *view )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
TRACE("%p\n", ov );
if( ov->table )
ov->table->ops->delete( ov->table );
if( ov->reorder )
HeapFree( GetProcessHeap(), 0, ov->reorder );
ov->reorder = NULL;
HeapFree( GetProcessHeap(), 0, ov );
return ERROR_SUCCESS;
}
MSIVIEWOPS order_ops =
{
ORDER_fetch_int,
ORDER_execute,
ORDER_close,
ORDER_get_dimensions,
ORDER_get_column_info,
ORDER_modify,
ORDER_delete
};
UINT ORDER_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
{
MSIORDERVIEW *ov = NULL;
UINT count = 0, r;
TRACE("%p\n", ov );
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
{
ERR("can't get table dimensions\n");
return r;
}
ov = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof *ov + sizeof (UINT) * count );
if( !ov )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
ov->view.ops = &order_ops;
ov->db = db;
ov->table = table;
ov->reorder = NULL;
ov->num_cols = 0;
*view = (MSIVIEW*) ov;
return ERROR_SUCCESS;
}
UINT ORDER_AddColumn( MSIVIEW *view, LPWSTR name )
{
MSIORDERVIEW *ov = (MSIORDERVIEW*)view;
UINT n, count, r;
MSIVIEW *table;
TRACE("%p adding %s\n", ov, debugstr_w( name ) );
if( ov->view.ops != &order_ops )
return ERROR_FUNCTION_FAILED;
table = ov->table;
if( !table )
return ERROR_FUNCTION_FAILED;
if( !table->ops->get_dimensions )
return ERROR_FUNCTION_FAILED;
if( !table->ops->get_column_info )
return ERROR_FUNCTION_FAILED;
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
return r;
if( ov->num_cols >= count )
return ERROR_FUNCTION_FAILED;
r = VIEW_find_column( table, name, &n );
if( r != ERROR_SUCCESS )
return r;
ov->cols[ov->num_cols] = n;
TRACE("Ordering by column %s (%d)\n", debugstr_w( name ), n);
ov->num_cols++;
return ERROR_SUCCESS;
}