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/*
*
* This file is part of the XForms library package.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with XForms; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
*/
/***********************************************************************
* $Id: readint.c,v 0.80 1994/02/24 09:48:11 zhao Exp $
*
*. Copyright(c) 1993,1994 by T.C. Zhao
* All rights reserved.
*.
*
* Read an integer (decimal or hex) from a file.
* Valid sepertors are SPACE, \t \n and ,
* Comment is introduced by #
*
* For hex integers, a-f, A-F is assumed continous
***********************************************************************/
#if !defined(lint) && defined(F_ID)
char *id_rdint = "$Id: readint.c,v 0.80 1994/02/24 09:48:11 zhao Exp $";
#endif
#include <stdio.h>
#include <ctype.h> /* for isdigit */
#include "forms.h"
#include "ulib.h"
#define IS_FS(c) ((c)==' ' || (c)=='\t' || (c)=='\n' || (c)==',' )
#define IS_COMMENT(c) ((c) == '#')
static int yell = 0;
static void
bad_character(int c)
{
if (yell && c != EOF)
(void) fprintf(stderr, "Bad character %c Code=%d\n", c, c);
}
static int
skip_comment(FILE * fp)
{
register int c;
while ((c = getc(fp)) != EOF && c != '\n')
;
return (c != EOF) ? getc(fp) : EOF;
}
/* read an integer [+-]nnn. No way to return error status */
int
fl_readint(FILE * fp)
{
register int c, num = 0, sign = 1;
do
{
c = getc(fp);
while (IS_COMMENT(c))
c = skip_comment(fp);
}
while (IS_FS(c));
if (c == '-' || c == '+')
{
sign = (c == '-') ? -1 : 1;
c = getc(fp);
}
while (isdigit(c))
{
num = 10 * num + c - '0';
c = getc(fp);
}
if (!IS_FS(c))
{
bad_character(c);
num = 123456;
}
return sign * num;
}
/* Read a positive integer. return EOF if error */
int
fl_readpint(FILE * fp)
{
register int c, num = 0;
do
{
c = getc(fp);
while (IS_COMMENT(c))
c = skip_comment(fp);
}
while (IS_FS(c));
if (!(c == '+' || isdigit(c)))
{
bad_character(c);
return EOF;
}
do
{
num = 10 * num + c - '0';
c = getc(fp);
}
while (isdigit(c));
return num;
}
/* Read a hex integer */
int
fl_readhexint(FILE * fp)
{
register int num = 0, i, c;
static short hextab[256];
/* initialize the hex table */
if (!hextab['1'])
{
for (i = '1'; i <= '9'; i++)
hextab[i] = i - '0';
for (i = 'A'; i <= 'F'; i++)
hextab[i] = 10 + i - 'A';
for (i = 'a'; i <= 'f'; i++)
hextab[i] = 10 + i - 'a';
}
do
{
c = getc(fp);
while (IS_COMMENT(c))
c = skip_comment(fp);
}
while (IS_FS(c));
/* demand 0[xX] */
if (c != '0' || ((c = getc(fp)) != 'x' && c != 'X'))
{
bad_character(c);
return EOF;
}
/* now do the coversion */
while ((c = getc(fp)), isxdigit(c))
num = (num << 4) + hextab[c];
return num;
}
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