exendf.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 90 行

/****************************************************************************
*
*                            Open Watcom Project
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*    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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//
// EXENDF       : Run-time ENDFILE statement processor
//

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

extern  void            ChkUnitId(void);
extern  bool            FindFtnFile(void);
extern  void            ChkConnected(void);
extern  void            ChkIOOperation(ftnfile *);
extern  void            ChkSequential(int);
extern  void            ClrBuff(void);
extern  void            SysCreateFile(ftnfile *);
extern  bool            NoEOF(ftnfile *);
extern  void            EndFilef(ftnfile *);
extern  void            ChkIOErr(ftnfile *);
extern  void            SetEOF(void);
extern  int             IOMain(void (*)( void ));


static  void    ExEndFile( void ) {
//===========================

    ftnfile     *fcb;

    ChkUnitId();
    FindFtnFile();
    ChkConnected();
    fcb = IOCB->fileinfo;
    ChkIOOperation( fcb );
    ChkSequential( IO_AEND );
    ClrBuff();
    if( !( fcb->flags & FTN_FSEXIST ) ) {
        SysCreateFile( fcb );
    }
    // Some files like TERMINAL, SERIAL have no EOF.
    if( !NoEOF( fcb ) ) {
        EndFilef( fcb );        // set end of file
        if( !_NoRecordOrganization( fcb ) ) {
            fcb->eofrecnum = fcb->recnum;
            fcb->recnum++;          // recnum is set 1 past endfile record
        }
        ChkIOErr( fcb );
        fcb->flags |= FTN_EOF;
    }
}


int     IOEndf( void ) {
//================

    IOCB->iostmt = IO_EFILE;
    return( IOMain( &ExEndFile ) );
}