reactos/dll/win32/msi/distinct.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);
typedef struct tagDISTINCTSET
{
UINT val;
UINT count;
UINT row;
struct tagDISTINCTSET *nextrow;
struct tagDISTINCTSET *nextcol;
} DISTINCTSET;
typedef struct tagMSIDISTINCTVIEW
{
MSIVIEW view;
MSIDATABASE *db;
MSIVIEW *table;
UINT row_count;
UINT *translation;
} MSIDISTINCTVIEW;
static DISTINCTSET ** distinct_insert( DISTINCTSET **x, UINT val, UINT row )
{
/* horrible O(n) find */
while( *x )
{
if( (*x)->val == val )
{
(*x)->count++;
return x;
}
x = &(*x)->nextrow;
}
/* nothing found, so add one */
*x = msi_alloc( sizeof (DISTINCTSET) );
if( *x )
{
(*x)->val = val;
(*x)->count = 1;
(*x)->row = row;
(*x)->nextrow = NULL;
(*x)->nextcol = NULL;
}
return x;
}
static void distinct_free( DISTINCTSET *x )
{
while( x )
{
DISTINCTSET *next = x->nextrow;
distinct_free( x->nextcol );
msi_free( x );
x = next;
}
}
static UINT DISTINCT_fetch_int( struct tagMSIVIEW *view, UINT row, UINT col, UINT *val )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p %d %d %p\n", dv, row, col, val );
if( !dv->table )
return ERROR_FUNCTION_FAILED;
if( row >= dv->row_count )
return ERROR_INVALID_PARAMETER;
row = dv->translation[ row ];
return dv->table->ops->fetch_int( dv->table, row, col, val );
}
static UINT DISTINCT_execute( struct tagMSIVIEW *view, MSIRECORD *record )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
UINT r, i, j, r_count, c_count;
DISTINCTSET *rowset = NULL;
TRACE("%p %p\n", dv, record);
if( !dv->table )
return ERROR_FUNCTION_FAILED;
r = dv->table->ops->execute( dv->table, record );
if( r != ERROR_SUCCESS )
return r;
r = dv->table->ops->get_dimensions( dv->table, &r_count, &c_count );
if( r != ERROR_SUCCESS )
return r;
dv->translation = msi_alloc( r_count*sizeof(UINT) );
if( !dv->translation )
return ERROR_FUNCTION_FAILED;
/* build it */
for( i=0; i<r_count; i++ )
{
DISTINCTSET **x = &rowset;
for( j=1; j<=c_count; j++ )
{
UINT val = 0;
r = dv->table->ops->fetch_int( dv->table, i, j, &val );
if( r != ERROR_SUCCESS )
{
ERR("Failed to fetch int at %d %d\n", i, j );
distinct_free( rowset );
return r;
}
x = distinct_insert( x, val, i );
if( !*x )
{
ERR("Failed to insert at %d %d\n", i, j );
distinct_free( rowset );
return ERROR_FUNCTION_FAILED;
}
if( j != c_count )
x = &(*x)->nextcol;
}
/* check if it was distinct and if so, include it */
if( (*x)->row == i )
{
TRACE("Row %d -> %d\n", dv->row_count, i);
dv->translation[dv->row_count++] = i;
}
}
distinct_free( rowset );
return ERROR_SUCCESS;
}
static UINT DISTINCT_close( struct tagMSIVIEW *view )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p\n", dv );
if( !dv->table )
return ERROR_FUNCTION_FAILED;
msi_free( dv->translation );
dv->translation = NULL;
dv->row_count = 0;
return dv->table->ops->close( dv->table );
}
static UINT DISTINCT_get_dimensions( struct tagMSIVIEW *view, UINT *rows, UINT *cols )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p %p %p\n", dv, rows, cols );
if( !dv->table )
return ERROR_FUNCTION_FAILED;
if( rows )
{
if( !dv->translation )
return ERROR_FUNCTION_FAILED;
*rows = dv->row_count;
}
return dv->table->ops->get_dimensions( dv->table, NULL, cols );
}
static UINT DISTINCT_get_column_info( struct tagMSIVIEW *view, UINT n, LPCWSTR *name,
UINT *type, BOOL *temporary, LPCWSTR *table_name )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p %d %p %p %p %p\n", dv, n, name, type, temporary, table_name );
if( !dv->table )
return ERROR_FUNCTION_FAILED;
return dv->table->ops->get_column_info( dv->table, n, name,
type, temporary, table_name );
}
static UINT DISTINCT_modify( struct tagMSIVIEW *view, MSIMODIFY eModifyMode,
MSIRECORD *rec, UINT row )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p %d %p\n", dv, eModifyMode, rec );
if( !dv->table )
return ERROR_FUNCTION_FAILED;
return dv->table->ops->modify( dv->table, eModifyMode, rec, row );
}
static UINT DISTINCT_delete( struct tagMSIVIEW *view )
{
MSIDISTINCTVIEW *dv = (MSIDISTINCTVIEW*)view;
TRACE("%p\n", dv );
if( dv->table )
dv->table->ops->delete( dv->table );
msi_free( dv->translation );
msiobj_release( &dv->db->hdr );
msi_free( dv );
return ERROR_SUCCESS;
}
static const MSIVIEWOPS distinct_ops =
{
DISTINCT_fetch_int,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
DISTINCT_execute,
DISTINCT_close,
DISTINCT_get_dimensions,
DISTINCT_get_column_info,
DISTINCT_modify,
DISTINCT_delete,
NULL,
NULL,
NULL,
NULL,
NULL,
};
UINT DISTINCT_CreateView( MSIDATABASE *db, MSIVIEW **view, MSIVIEW *table )
{
MSIDISTINCTVIEW *dv = NULL;
UINT count = 0, r;
TRACE("%p\n", dv );
r = table->ops->get_dimensions( table, NULL, &count );
if( r != ERROR_SUCCESS )
{
ERR("can't get table dimensions\n");
return r;
}
dv = msi_alloc_zero( sizeof *dv );
if( !dv )
return ERROR_FUNCTION_FAILED;
/* fill the structure */
dv->view.ops = &distinct_ops;
msiobj_addref( &db->hdr );
dv->db = db;
dv->table = table;
dv->translation = NULL;
dv->row_count = 0;
*view = (MSIVIEW*) dv;
return ERROR_SUCCESS;
}