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/* Like vsprintf but provides a pointer to malloc'd storage, which must
be freed by the caller.
Copyright (C) 1994 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
static int int_vasprintf(char **result, 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;
memcpy(&ap, args, sizeof(va_list));
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;
}
}
}
*result = (char*)malloc (total_width);
return vsprintf (*result, format, *args);
}
int vasprintf(char **result, const char *format, va_list args);
int vasprintf(char **result, const char *format, va_list args)
{
return int_vasprintf (result, format, &args);
}
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