1 /* Like vsprintf but provides a pointer to malloc'd storage, which must
2 be freed by the caller.
3 Copyright (C) 1994, 2003, 2011, 2013 Free Software Foundation, Inc.
4
5 This file is part of the libiberty library.
6 Libiberty is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
10
11 Libiberty is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public
17 License along with libiberty; see the file COPYING.LIB. If not, write
18 to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
19 Floor, Boston, MA 02110-1301, USA. */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24 #include <ansidecl.h>
25 #include <stdarg.h>
26 #if !defined (va_copy) && defined (__va_copy)
27 # define va_copy(d,s) __va_copy((d),(s))
28 #endif
29 #include <stdio.h>
30 #ifdef HAVE_STRING_H
31 #include <string.h>
32 #endif
33 #ifdef HAVE_STDLIB_H
34 #include <stdlib.h>
35 #else
36 extern PTR malloc ();
37 #endif
38 #include "libiberty.h"
39 #include "vprintf-support.h"
40
41 #ifdef TEST
42 int global_total_width;
43 #endif
44
45 /*
46
47 @deftypefn Extension int vasprintf (char **@var{resptr}, @
48 const char *@var{format}, va_list @var{args})
49
50 Like @code{vsprintf}, but instead of passing a pointer to a buffer,
51 you pass a pointer to a pointer. This function will compute the size
52 of the buffer needed, allocate memory with @code{malloc}, and store a
53 pointer to the allocated memory in @code{*@var{resptr}}. The value
54 returned is the same as @code{vsprintf} would return. If memory could
55 not be allocated, minus one is returned and @code{NULL} is stored in
56 @code{*@var{resptr}}.
57
58 @end deftypefn
59
60 */
61
62 static int int_vasprintf (char **, const char *, va_list);
63
64 static int
int_vasprintf(char ** result,const char * format,va_list args)65 int_vasprintf (char **result, const char *format, va_list args)
66 {
67 int total_width = libiberty_vprintf_buffer_size (format, args);
68 #ifdef TEST
69 global_total_width = total_width;
70 #endif
71 *result = (char *) malloc (total_width);
72 if (*result != NULL)
73 return vsprintf (*result, format, args);
74 else
75 return -1;
76 }
77
78 int
vasprintf(char ** result,const char * format,_BSD_VA_LIST_ args)79 vasprintf (char **result, const char *format,
80 #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__)
81 _BSD_VA_LIST_ args)
82 #else
83 va_list args)
84 #endif
85 {
86 return int_vasprintf (result, format, args);
87 }
88
89 #ifdef TEST
90 static void ATTRIBUTE_PRINTF_1
checkit(const char * format,...)91 checkit (const char *format, ...)
92 {
93 char *result;
94 va_list args;
95 va_start (args, format);
96 vasprintf (&result, format, args);
97 va_end (args);
98
99 if (strlen (result) < (size_t) global_total_width)
100 printf ("PASS: ");
101 else
102 printf ("FAIL: ");
103 printf ("%d %s\n", global_total_width, result);
104
105 free (result);
106 }
107
108 extern int main (void);
109
110 int
main(void)111 main (void)
112 {
113 checkit ("%d", 0x12345678);
114 checkit ("%200d", 5);
115 checkit ("%.300d", 6);
116 checkit ("%100.150d", 7);
117 checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
118 777777777777777777333333333333366666666666622222222222777777777777733333");
119 checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
120
121 return 0;
122 }
123 #endif /* TEST */
124