rstlit.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 75 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:  Literal list
*
****************************************************************************/


#include "ftnstd.h"
#include "global.h"
#include "stmtsw.h"
#include "fmemmgr.h"

#include <string.h>


sym_id  STLit( byte *string, int len ) {
//======================================

// Search the symbol a literal. If the literal is not in the
// symbol table, add it to the symbol table.

    sym_id      sym;

    sym = LList;
    while( sym != NULL ) {
        if( sym->lt.length == len ) {
            if( memcmp( string, &sym->lt.value, len ) == 0 ) {
                if( StmtSw & SS_DATA_INIT ) {
                    sym->lt.flags |= LT_DATA_STMT;
                } else {
                    sym->lt.flags |= LT_EXEC_STMT;
                }
                return( sym );
            }
        }
        sym = sym->lt.link;
    }
    sym = FMemAlloc( sizeof( literal ) - 1 + len );
    memcpy( &sym->lt.value, string, len );
    sym->lt.length = len;
    if( StmtSw & SS_DATA_INIT ) {
        sym->lt.flags = LT_DATA_STMT;
    } else {
        sym->lt.flags = LT_EXEC_STMT;
    }
    sym->lt.address = NULL;
    sym->lt.link = LList;
    LList = sym;
    return( sym );
}