Mercurial > hg > dmlib

comparison dmstring.c @ 0:32250b436bca

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial re-import.
author Matti Hamalainen <ccr@tnsp.org>
date Fri, 28 Sep 2012 01:54:23 +0300
parents
children 2726d91e3409
comparison
equal deleted inserted replaced
-1:000000000000 0:32250b436bca
1 #include "dmlib.h"
2 #include <stdarg.h>
3
4 /* strdup with a NULL check
5 */
6 char *dm_strdup(const char *s)
7 {
8 char *res;
9 if (s == NULL)
10 return NULL;
11
12 if ((res = dmMalloc(strlen(s) + 1)) == NULL)
13 return NULL;
14
15 strcpy(res, s);
16 return res;
17 }
18
19
20 /* Simulate a sprintf() that allocates memory
21 */
22 char *dm_strdup_vprintf(const char *fmt, va_list args)
23 {
24 int size = 64;
25 char *buf;
26
27 if ((buf = dmMalloc(size)) == NULL)
28 return NULL;
29
30 while (1)
31 {
32 int n;
33 va_list ap;
34 va_copy(ap, args);
35 n = vsnprintf(buf, size, fmt, ap);
36 va_end(ap);
37
38 if (n > -1 && n < size)
39 return buf;
40 if (n > -1)
41 size = n + 1;
42 else
43 size *= 2;
44
45 if ((buf = dmRealloc(buf, size)) == NULL)
46 return NULL;
47 }
48 }
49
50
51 char *dm_strdup_printf(const char *fmt, ...)
52 {
53 char *res;
54 va_list ap;
55
56 va_start(ap, fmt);
57 res = dm_strdup_vprintf(fmt, ap);
58 va_end(ap);
59
60 return res;
61 }