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mescc: Mes C Library: Support gcc-4.6.4: Add fscanf, vfscanf.

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* lib/stdio/vfscanf.c: New file.
* lib/stdio/fscanf.c: New file.
* build-aux/configure-lib.sh (libc_gnu_SOURCES): Add them.
* include/stdio.h (fscanf): Declare.
* include/stdarg.h (vfscanf): Declare.
* lib/stub/fscanf.c: Remove.
This commit is contained in:
Jan Nieuwenhuizen 2019-09-06 19:04:50 +02:00
parent d643f923a3
commit 6bb225b403
No known key found for this signature in database
GPG key ID: F3C1A0D9C1D65273
6 changed files with 136 additions and 12 deletions
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3
build-aux/configure-lib.sh
View file

@ -243,7 +243,9 @@ lib/stdio/feof.c
lib/stdio/fgets.c
lib/stdio/fileno.c
lib/stdio/freopen.c
lib/stdio/fscanf.c
lib/stdio/perror.c
lib/stdio/vfscanf.c
lib/stdlib/__exit.c
lib/stdlib/abort.c
lib/stdlib/abs.c
@ -270,7 +272,6 @@ lib/stub/ctime.c
lib/stub/fpurge.c
lib/stub/freadahead.c
lib/stub/frexp.c
lib/stub/fscanf.c
lib/stub/getgrgid.c
lib/stub/getgrnam.c
lib/stub/getlogin.c

1
include/stdarg.h
View file

@ -41,6 +41,7 @@ typedef char *va_list;
int vexec (char const *file_name, va_list ap);
int vfprintf (FILE * stream, char const *template, va_list ap);
int vfscanf (FILE * stream, char const *template, va_list ap);
int vprintf (char const *format, va_list ap);
int vsprintf (char *str, char const *format, va_list ap);
int vsnprintf (char *str, size_t size, char const *format, va_list ap);

3
include/stdio.h
View file

@ -69,6 +69,7 @@ int fprintf (FILE * stream, char const *format, ...);
int fpurge (FILE * stream);
int fputc (int c, FILE * stream);
int fputs (char const *s, FILE * stream);
int fscanf (FILE * stream, char const *template, ...);
int fseek (FILE * stream, long offset, int whence);
int getc (FILE * stream);
int getchar (void);
@ -81,7 +82,7 @@ int remove (char const *file_name);
int setvbuf (FILE * stream, char *buf, int mode, size_t size);
int snprintf (char *str, size_t size, char const *format, ...);
int sprintf (char *str, char const *format, ...);
int sscanf (char const *str, const char *format, ...);
int sscanf (char const *str, char const *format, ...);
int ungetc (int c, FILE * stream);
long ftell (FILE * stream);
size_t fread (void *ptr, size_t size, size_t count, FILE * stream);

16
lib/stub/fscanf.c → lib/stdio/fscanf.c
View file

@ -1,6 +1,6 @@
/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
@ -19,15 +19,15 @@
*/
#include <mes/lib.h>
#include <errno.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdio.h>
int
fscanf (FILE * stream, char const *template, ...)
{
static int stub = 0;
if (__mes_debug () && !stub)
eputs ("fscan stub\n");
stub = 1;
return 0;
va_list ap;
va_start (ap, template);
int r = vfscanf (stream, template, ap);
va_end (ap);
return r;
}

2
lib/stdio/sscanf.c
View file

@ -23,7 +23,7 @@
#include <stdio.h>
int
sscanf (char const *str, const char *template, ...)
sscanf (char const *str, char const *template, ...)
{
va_list ap;
va_start (ap, template);

121
lib/stdio/vfscanf.c Normal file
View file

@ -0,0 +1,121 @@
/* -*-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 <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;
}