settrace.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 91 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
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


//
// SETTRACE     : set traceback information
//

#include "ftnstd.h"
#include "rundat.h"
#include "rtenv.h"
#include "trcback.h"
#include "errcod.h"

#include <string.h>

extern  void            StdWriteNL(char *,int);
extern  void            MsgBuffer(uint,char *,...);
extern  void            RTSysInit(void);

extern  void            (*TraceRoutine)(char *);


static  void    TraceInfo( char *buff ) {
//=======================================

    traceback   *tb;

    MsgBuffer( MS_TRACE_INFO, buff, ExCurr->line, ExCurr->name );
    StdWriteNL( buff, strlen( buff ) );
    for( tb = ExCurr->link; tb != NULL; tb = tb->link ) {
        MsgBuffer( MS_CALLED_FROM, buff, tb->line, tb->name );
        StdWriteNL( buff, strlen( buff ) );
    }
}


void            SetLine( uint src_line ) {
//========================================

    RTSysInit();
    ExCurr->line = src_line;
}


void            SetModule( traceback *tb ) {
//==========================================

    RTSysInit();
    // if TraceRoutine is not NULL the first time SetModule() is called,
    // we can assume we have linked with WATFOR-77 and will use its method
    // of printing traceback information
    if( TraceRoutine == NULL ) {
        TraceRoutine = &TraceInfo;
    }
    if( ExCurr == tb ) {        // delete entry from traceback chain
        ExCurr = ExCurr->link;
    } else {                    // add entry to traceback chain
        tb->link = ExCurr;
        ExCurr = tb;
    }
}