fmtinit.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 97 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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//
// FmtInit      : FORMAT statement initialization routines
//

#include "ftnstd.h"
#include "fmterr.h"
#include "fmtdef.h"
#include "fmtdat.h"
#include "format.h"
#include "global.h"
#include "fmttab.h"

extern  void            GFEmEnd(void);
extern  void            GFEmNum(int);
extern  void            FmtError(int);
extern  void            GStmtLabel(sym_id);
extern  void            R_FDoSpec(void);
extern  void            StartFmt(cs_label);
extern  void            EndFmt(void);

extern  const FmtElements CFmtStruct;


void    FScan( int fmt_length, char *fmt_string, cs_label fmt_label ) {
//=====================================================================

// FORMAT statement parsing (only compile-time).


    FInit( fmt_length, fmt_string );
    StartFmt( fmt_label );
    R_FDoSpec();
    FFinish();
    GFEmEnd();
    EndFmt();
}


static  void    FInit( int fmt_length, char *fmt_string ) {
//=========================================================

    Fmt_start = fmt_string;
    Fmt_end = fmt_string + fmt_length;
    Fmt_paren_level = 0;
    Fmt_charptr = fmt_string;
    Fmt_delimited = NO_DELIM;
    FmtEmStruct = &CFmtStruct;
}


static  void    FFinish(void) {
//=========================

    if( StmtProc == PR_FMT ) {
        for(;;) {
            if( *Fmt_charptr != ' ' ) break;
            ++Fmt_charptr;
            if( Fmt_charptr >= Fmt_end ) break;
        }
        if( ( Fmt_charptr < Fmt_end ) && ( *Fmt_charptr != '!' ) ) {
            FmtError( FM_NO_EOS );
        }
    }
}