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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
int
vfscanf (FILE * stream, char const *template, va_list ap)
{
char p = fgetc (stream);
char const *t = template;
int count = 0;
while (*t && p != EOF)
if (*t != '%')
{
t++;
p = fgetc (stream);
}
else
{
t++;
char c = *t;
if (c == 'l')
c = *++t;
switch (c)
{
case '%':
{
p = fgetc (stream);
break;
}
case 'c':
{
char *c = va_arg (ap, char *);
*c = p;
p = fgetc (stream);
count++;
break;
}
case 'd':
case 'i':
case 'u':
{
int *d = va_arg (ap, int *);
char buf[20];
char *q = buf;
if (p == '+' || p == '-')
{
*q++ = p;
p = fgetc (stream);
}
while (isdigit (p))
{
*q++ = p;
p = fgetc (stream);
}
ungetc (p, stream);
*q = 0;
q = buf;
*d = abtol (&q, 10);
count++;
break;
}
case 'e':
case 'f':
case 'g':
case 'E':
case 'G':
{
float *f = va_arg (ap, float *);
char buf[20];
char *q = buf;
if (p == '+' || p == '-')
{
*q++ = p;
p = fgetc (stream);
}
while (isdigit (p))
{
*q++ = p;
p = fgetc (stream);
}
ungetc (p, stream);
*q = 0;
q = buf;
*f = strtod (q, &q);
count++;
break;
}
default:
{
eputs ("vsscanf: not supported: %:");
eputc (c);
eputs ("\n");
t++;
p = fgetc (stream);
}
}
t++;
}
va_end (ap);
return count;
}
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