0,0 → 1,119 |
/* 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; |
} |