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1 | /* Like vsprintf but provides a pointer to malloc'd storage, which must | |
2 | be freed by the caller. | |
3 | Copyright (C) 1994-2020 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 | |
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 | |
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 | |
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 | |
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 */ |