ReactOS  0.4.14-dev-77-gd9e7c48
asprintf.c
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1 /* Copyright (c) 2004 Darren Tucker.
2  *
3  * Based originally on asprintf.c from OpenBSD:
4  * Copyright (c) 1997 Todd C. Miller <Todd.Miller AT courtesan.com>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 //extern int vsnprintf();
20 #include <wintirpc.h>
21 #include <stdio.h>
22 #ifndef __REACTOS__
23 #include <varargs.h>
24 #endif
25 
26 /* Include vasprintf() if not on your OS. */
27 #ifndef HAVE_VASPRINTF
28 
29 #include <errno.h>
30 #include <limits.h>
31 #include <stdarg.h>
32 #include <stdlib.h>
33 
34 #ifndef VA_COPY
35 # ifdef HAVE_VA_COPY
36 # define VA_COPY(dest, src) va_copy(dest, src)
37 # else
38 # ifdef HAVE___VA_COPY
39 # define VA_COPY(dest, src) __va_copy(dest, src)
40 # else
41 # define VA_COPY(dest, src) (dest) = (src)
42 # endif
43 # endif
44 #endif
45 
46 #define INIT_SZ 128
47 
48 int
49 vasprintf(char **str, const char *fmt, va_list ap)
50 {
51  int ret = -1;
52  va_list ap2;
53  char *string, *newstr;
54  size_t len;
55 
56  VA_COPY(ap2, ap);
57  if ((string = malloc(INIT_SZ)) == NULL)
58  goto fail;
59 
60  ret = _vsnprintf(string, INIT_SZ, fmt, ap2);
61  if (ret >= 0 && ret < INIT_SZ) { /* succeeded with initial alloc */
62  *str = string;
63  } else if (ret == INT_MAX || ret < 0) { /* Bad length */
64  goto fail;
65  } else { /* bigger than initial, realloc allowing for nul */
66  len = (size_t)ret + 1;
67  if ((newstr = realloc(string, len)) == NULL) {
68  free(string);
69  goto fail;
70  } else {
71  va_end(ap2);
72  VA_COPY(ap2, ap);
73  ret = _vsnprintf(newstr, len, fmt, ap2);
74  if (ret >= 0 && (size_t)ret < len) {
75  *str = newstr;
76  } else { /* failed with realloc'ed string, give up */
77  free(newstr);
78  goto fail;
79  }
80  }
81  }
82  va_end(ap2);
83  return (ret);
84 
85 fail:
86  *str = NULL;
87  errno = ENOMEM;
88  va_end(ap2);
89  return (-1);
90 }
91 #endif
92 
93 /* Include asprintf() if not on your OS. */
94 #ifndef HAVE_ASPRINTF
95 int asprintf(char **str, const char *fmt, ...)
96 {
97  va_list ap;
98  int ret;
99 
100  *str = NULL;
101  va_start(ap, fmt);
102  ret = vasprintf(str, fmt, ap);
103  va_end(ap);
104 
105  return ret;
106 }
107 #endif
#define realloc
Definition: debug_ros.c:6
int vasprintf(char **str, const char *fmt, va_list ap)
Definition: asprintf.c:49
#define INT_MAX
Definition: limits.h:40
#define free
Definition: debug_ros.c:5
int errno
Definition: arc.h:48
int asprintf(char **str, const char *fmt,...)
Definition: asprintf.c:95
#define va_end(ap)
Definition: acmsvcex.h:90
const WCHAR * str
smooth NULL
Definition: ftsmooth.c:416
char * va_list
Definition: acmsvcex.h:78
#define VA_COPY(dest, src)
Definition: asprintf.c:41
__kernel_size_t size_t
Definition: linux.h:237
#define INIT_SZ
Definition: asprintf.c:46
int ret
GLenum GLsizei len
Definition: glext.h:6722
char string[160]
Definition: util.h:11
#define va_start(ap, A)
Definition: acmsvcex.h:91
#define _vsnprintf
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void int int ULONGLONG int va_list * ap
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#define malloc
Definition: debug_ros.c:4
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