0,0 → 1,197 |
/* Like vsprintf but provides a pointer to malloc'd storage, which must |
be freed by the caller. |
Copyright (C) 1994, 2003, 2011 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 (); |
extern PTR malloc (); |
#endif |
#include "libiberty.h" |
|
#ifdef TEST |
int global_total_width; |
#endif |
|
/* |
|
@deftypefn Extension int vasprintf (char **@var{resptr}, @ |
const char *@var{format}, va_list @var{args}) |
|
Like @code{vsprintf}, but instead of passing a pointer to a buffer, |
you pass a pointer to a pointer. This function will compute the size |
of the buffer needed, allocate memory with @code{malloc}, and store a |
pointer to the allocated memory in @code{*@var{resptr}}. The value |
returned is the same as @code{vsprintf} would return. If memory could |
not be allocated, minus one is returned and @code{NULL} is stored in |
@code{*@var{resptr}}. |
|
@end deftypefn |
|
*/ |
|
static int int_vasprintf (char **, const char *, va_list); |
|
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; |
|
#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 |
#ifdef TEST |
global_total_width = total_width; |
#endif |
*result = (char *) malloc (total_width); |
if (*result != NULL) |
return vsprintf (*result, format, args); |
else |
return -1; |
} |
|
int |
vasprintf (char **result, const char *format, |
#if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) |
_BSD_VA_LIST_ args) |
#else |
va_list args) |
#endif |
{ |
return int_vasprintf (result, format, args); |
} |
|
#ifdef TEST |
static void ATTRIBUTE_PRINTF_1 |
checkit (const char *format, ...) |
{ |
char *result; |
VA_OPEN (args, format); |
VA_FIXEDARG (args, const char *, format); |
vasprintf (&result, format, args); |
VA_CLOSE (args); |
|
if (strlen (result) < (size_t) global_total_width) |
printf ("PASS: "); |
else |
printf ("FAIL: "); |
printf ("%d %s\n", global_total_width, result); |
|
free (result); |
} |
|
extern int main (void); |
|
int |
main (void) |
{ |
checkit ("%d", 0x12345678); |
checkit ("%200d", 5); |
checkit ("%.300d", 6); |
checkit ("%100.150d", 7); |
checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ |
777777777777777777333333333333366666666666622222222222777777777777733333"); |
checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); |
|
return 0; |
} |
#endif /* TEST */ |