/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
/*                                                                        */
/* gos720 src/gos/2d/XTOP/contrib/programs/xditview/lex.c 1.2             */
/*                                                                        */
/* Licensed Materials - Property of IBM                                   */
/*                                                                        */
/* COPYRIGHT International Business Machines Corp. 1996                   */
/* All Rights Reserved                                                    */
/*                                                                        */
/* US Government Users Restricted Rights - Use, duplication or            */
/* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.      */
/*                                                                        */
/* IBM_PROLOG_END_TAG                                                     */
/* SCCSID_BEGIN_TAG                                                    */
#ifndef lint
static char sccsid[] = "@(#)00  1.2  src/gos/2d/XTOP/contrib/programs/xditview/lex.c, xsample, gos720 12/9/96 15:10:16";
#endif
/* SCCSID_END_TAG                                                      */
#define _ILS_MACROS
#include <X11/Xos.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <stdio.h>
#include <ctype.h>
#include "DviP.h"

DviGetAndPut(dw, cp)
    DviWidget	dw;
    int		*cp;
{
    if (dw->dvi.ungot)
    {
	dw->dvi.ungot = 0;
	*cp = getc (dw->dvi.file);
    }
    else
    {
	*cp = getc (dw->dvi.file);
	putc (*cp, dw->dvi.tmpFile);
    }
    return *cp;
}

char *
GetLine(dw, Buffer, Length)
	DviWidget	dw;
	char	*Buffer;
	int	Length;
{
	int 	i = 0, c;
	char	*p = Buffer;
	
	Length--;			    /* Save room for final NULL */
	
	while (i < Length && DviGetC (dw, &c) != EOF && c != '\n')
		if (p)
			*p++ = c;
	if (c == '\n' && p)		    /* Retain the newline like fgets */
		*p++ = c;
	if (c == '\n')
		DviUngetC(dw, c);
	if (p)	
		*p = '\0';
	return (Buffer);
} 

char *
GetWord(dw, Buffer, Length)
	DviWidget	dw;
	char	*Buffer;
	int	Length;
{
	int 	i = 0, c;
	char	*p = Buffer;
	
	Length--;			    /* Save room for final NULL */
	while (DviGetC(dw, &c) != EOF && isspace(c))
		;
	if (c != EOF)
		DviUngetC(dw, c);
	while (i < Length && DviGetC(dw, &c) != EOF && !isspace(c))
		if (p)
			*p++ = c;
	if (c != EOF)
		DviUngetC(dw, c);
	if (p)
		*p = '\0';
	return (Buffer);
} 

GetNumber(dw)
	DviWidget	dw;
{
	int	i = 0,  c;

	while (DviGetC(dw, &c) != EOF && isspace(c))
		;
	if (c != EOF)
		DviUngetC(dw, c);
	while (DviGetC(dw, &c) != EOF && isdigit(c))
		i = i*10 + c - '0';
	if (c != EOF)
		DviUngetC(dw, c);
	return (i);
}