1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#ifndef HAVE_ASPRINTF
int asprintf(char **sptr, const char *fmt, ...)
{
// Guess we need no more than 100 bytes.
int n, size = 64;
char *p;
va_list ap;
if ((p = malloc (size)) == NULL)
{
*sptr=0;
return -1;
}
while (1)
{
// Try to print in the allocated space.
va_start(ap, fmt);
n = vsnprintf (p, size, fmt, ap);
va_end(ap);
// If that worked, return the string.
if (n > -1 && n < size)
{
*sptr=p;
return n;
}
// Else try again with more space.
if (n > -1) // glibc 2.1
size = n+1; // precisely what is needed
else // glibc 2.0
size *= 2; // twice the old size
if ((p = realloc (p, size)) == NULL)
{
*sptr=0;
return -1;
}
}
}
int vasprintf(char **sptr, const char *fmt, va_list ap)
{
// Guess we need no more than 100 bytes.
int n, size = 64;
char *p;
if ((p = malloc (size)) == NULL)
{
*sptr=0;
return -1;
}
while (1)
{
// Try to print in the allocated space.
n = vsnprintf (p, size, fmt, ap);
// If that worked, return the string.
if (n > -1 && n < size)
{
*sptr=p;
return n;
}
// Else try again with more space.
if (n > -1) // glibc 2.1
size = n+1; // precisely what is needed
else // glibc 2.0
size *= 2; // twice the old size
if ((p = realloc (p, size)) == NULL)
{
*sptr=0;
return -1;
}
}
}
#endif
|
