csexit.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 81 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


//
// CSEXIT    : processing for EXIT statement
//

#include "ftnstd.h"
#include "errcod.h"
#include "global.h"
#include "insert.h"
#include "utility.h"

extern  void            BlockLabel(void);
extern  void            CSExtn(void);
extern  itnode          *GetBlockLabel(void);
extern  void            GBranch(label_id);


void    CpExit(void) {
//================

// Compile the EXIT statement.

    itnode      *block_label;
    csnode      *csblock;

    CSExtn();
    block_label = GetBlockLabel();
    csblock = CSHead;
    for(;;) {
        if( ( csblock->typ == CS_DO ) ||
            ( csblock->typ == CS_DO_WHILE ) ||
            ( csblock->typ == CS_WHILE ) ||
            ( csblock->typ == CS_LOOP ) ||
            ( csblock->typ == CS_GUESS ) ||
            ( csblock->typ == CS_ADMIT ) ||
            ( csblock->typ == CS_REMOTEBLOCK ) ) {
            if( block_label->opnd_size == 0 ) break;
            if( CmpNode2Str( block_label, &csblock->label ) ) break;
        }
        if( csblock->link == NULL ) break;
        csblock = csblock->link;
    }
    if( csblock->typ == CS_EMPTY_LIST ) {
        StmtErr( SP_BAD_QUIT );
    } else {
        GBranch( csblock->bottom );
    }
    BlockLabel();
}