mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/* Estimate the length of the string generated by a vprintf-like
|
|
function. Used by vasprintf and xvasprintf.
|
|
Copyright (C) 1994, 2003, 2011, 2013, 2014 Free Software Foundation, Inc.
|
|
|
|
This file is part of the libiberty library.
|
|
Libiberty is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 of the License, or (at your option) any later version.
|
|
|
|
Libiberty 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with libiberty; see the file COPYING.LIB. If not, write
|
|
to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
|
|
Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#include <ansidecl.h>
|
|
#include <stdarg.h>
|
|
#if !defined (va_copy) && defined (__va_copy)
|
|
# define va_copy(d,s) __va_copy((d),(s))
|
|
#endif
|
|
#include <stdio.h>
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#else
|
|
extern unsigned long strtoul ();
|
|
#endif
|
|
#include "libiberty.h"
|
|
|
|
int
|
|
libiberty_vprintf_buffer_size (const char *format, va_list args)
|
|
{
|
|
const char *p = format;
|
|
/* Add one to make sure that it is never zero, which might cause malloc
|
|
to return NULL. */
|
|
int total_width = strlen (format) + 1;
|
|
va_list ap;
|
|
|
|
#ifdef va_copy
|
|
va_copy (ap, args);
|
|
#else
|
|
memcpy ((PTR) &ap, (PTR) &args, sizeof (va_list));
|
|
#endif
|
|
|
|
while (*p != '\0')
|
|
{
|
|
if (*p++ == '%')
|
|
{
|
|
while (strchr ("-+ #0", *p))
|
|
++p;
|
|
if (*p == '*')
|
|
{
|
|
++p;
|
|
total_width += abs (va_arg (ap, int));
|
|
}
|
|
else
|
|
total_width += strtoul (p, (char **) &p, 10);
|
|
if (*p == '.')
|
|
{
|
|
++p;
|
|
if (*p == '*')
|
|
{
|
|
++p;
|
|
total_width += abs (va_arg (ap, int));
|
|
}
|
|
else
|
|
total_width += strtoul (p, (char **) &p, 10);
|
|
}
|
|
while (strchr ("hlL", *p))
|
|
++p;
|
|
/* Should be big enough for any format specifier except %s and floats. */
|
|
total_width += 30;
|
|
switch (*p)
|
|
{
|
|
case 'd':
|
|
case 'i':
|
|
case 'o':
|
|
case 'u':
|
|
case 'x':
|
|
case 'X':
|
|
case 'c':
|
|
(void) va_arg (ap, int);
|
|
break;
|
|
case 'f':
|
|
case 'e':
|
|
case 'E':
|
|
case 'g':
|
|
case 'G':
|
|
(void) va_arg (ap, double);
|
|
/* Since an ieee double can have an exponent of 307, we'll
|
|
make the buffer wide enough to cover the gross case. */
|
|
total_width += 307;
|
|
break;
|
|
case 's':
|
|
total_width += strlen (va_arg (ap, char *));
|
|
break;
|
|
case 'p':
|
|
case 'n':
|
|
(void) va_arg (ap, char *);
|
|
break;
|
|
}
|
|
p++;
|
|
}
|
|
}
|
|
#ifdef va_copy
|
|
va_end (ap);
|
|
#endif
|
|
return total_width;
|
|
}
|