ReactOS 0.4.15-dev-7108-g1cf6ce6
asprintf.c File Reference
#include <wintirpc.h>
#include <stdio.h>
#include <varargs.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>
Include dependency graph for asprintf.c:

Go to the source code of this file.

Macros

#define VA_COPY(dest, src)   (dest) = (src)
 
#define INIT_SZ   128
 

Functions

int vasprintf (char **str, const char *fmt, va_list ap)
 
int asprintf (char **str, const char *fmt,...)
 

Macro Definition Documentation

◆ INIT_SZ

#define INIT_SZ   128

Definition at line 46 of file asprintf.c.

◆ VA_COPY

#define VA_COPY (   dest,
  src 
)    (dest) = (src)

Definition at line 41 of file asprintf.c.

Function Documentation

◆ asprintf()

int asprintf ( char **  str,
const char fmt,
  ... 
)

Definition at line 95 of file asprintf.c.

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}
char * va_list
Definition: acmsvcex.h:78
#define va_end(ap)
Definition: acmsvcex.h:90
#define va_start(ap, A)
Definition: acmsvcex.h:91
int vasprintf(char **str, const char *fmt, va_list ap)
Definition: asprintf.c:49
#define NULL
Definition: types.h:112
const WCHAR * str
Definition: dsound.c:943
int ret
void int int ULONGLONG int va_list * ap
Definition: winesup.h:36

Referenced by __rpc_taddr2uaddr_af().

◆ vasprintf()

int vasprintf ( char **  str,
const char fmt,
va_list  ap 
)

Definition at line 49 of file asprintf.c.

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
85fail:
86 *str = NULL;
87 errno = ENOMEM;
88 va_end(ap2);
89 return (-1);
90}
#define ENOMEM
Definition: acclib.h:84
#define INIT_SZ
Definition: asprintf.c:46
#define VA_COPY(dest, src)
Definition: asprintf.c:41
#define realloc
Definition: debug_ros.c:6
#define free
Definition: debug_ros.c:5
#define malloc
Definition: debug_ros.c:4
__kernel_size_t size_t
Definition: linux.h:237
GLenum GLsizei len
Definition: glext.h:6722
#define INT_MAX
Definition: limits.h:40
char string[160]
Definition: util.h:11
#define errno
Definition: errno.h:18
#define _vsnprintf
Definition: xmlstorage.h:202

Referenced by asprintf().