tryalias.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 127 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  Automatic pointer conversion for select message parameters.
*
****************************************************************************/


#include "cover.h"
#include <string.h>
#define MAX_CNAME       10

BOOL TryAlias( HWND hwnd, WORD msg, LONG *lparam )
{
    DWORD               alias;
    MDICREATESTRUCT     *mcs;
    char                class[MAX_CNAME];

    if( hwnd == (HWND)~0 ) return( FALSE );

    /*
     * misc. messages
     */
    switch( msg ) {
    case WM_NCCALCSIZE:
        alias = AllocAlias16( (LPSTR) *lparam );
        *lparam = alias;
        return( TRUE );
    case WM_MDICREATE:
        mcs = (MDICREATESTRUCT *) *lparam;
        mcs->szClass = (LPSTR) AllocAlias16( (LPSTR)mcs->szClass );
        mcs->szTitle = (LPSTR) AllocAlias16( (LPSTR)mcs->szTitle );
        alias = AllocAlias16( (LPSTR) *lparam );
        *lparam = alias;
        return( TRUE );
    }

    /*
     * try class specific messages
     */
    if( hwnd == 0 ) return( FALSE );            /* 10-may-95 */
    class[0] = 0;
    GetClassName( hwnd, class, MAX_CNAME );
    class[MAX_CNAME-1] = 0;

    /*
     * combo box messages
     */
    if( !stricmp( class,"COMBOBOX" ) ) {
        switch( msg ) {
        case CB_ADDSTRING:
        case CB_DIR:
        case CB_FINDSTRING:
        case CB_FINDSTRINGEXACT:
        case CB_GETLBTEXT:
        case CB_INSERTSTRING:
        case CB_SELECTSTRING:
            alias = AllocAlias16( (LPSTR) *lparam );
            *lparam = alias;
            return( TRUE );
        }
    }

    /*
     * edit control messages
     */
    if( !stricmp( class,"EDIT" ) ) {
        switch( msg ) {
        case EM_GETLINE:
        case EM_GETRECT:
        case EM_REPLACESEL:
        case EM_SETRECT:
        case EM_SETRECTNP:
        case EM_SETTABSTOPS:
            alias = AllocAlias16( (LPSTR) *lparam );
            *lparam = alias;
            return( TRUE );
        }
    }

    /*
     * list box messages
     */
    if( !stricmp( class,"LISTBOX" ) ) {
        switch( msg ) {
        case LB_ADDSTRING:
        case LB_DIR:
        case LB_FINDSTRING:
        case LB_FINDSTRINGEXACT:
        case LB_GETITEMRECT:
        case LB_GETSELITEMS:
        case LB_GETTEXT:
        case LB_INSERTSTRING:
        case LB_SELECTSTRING:
        case LB_SETTABSTOPS:
            alias = AllocAlias16( (LPSTR) *lparam );
            *lparam = alias;
            return( TRUE );
        }
    }

    return( FALSE );
}