1 #include "asn1/asn1c/asn_internal.h"
2
3 ssize_t
asn__format_to_callback(int (* cb)(const void *,size_t,void * key),void * key,const char * fmt,...)4 asn__format_to_callback(int (*cb)(const void *, size_t, void *key), void *key,
5 const char *fmt, ...) {
6 char scratch[64];
7 char *buf = scratch;
8 size_t buf_size = sizeof(scratch);
9 int wrote;
10 int cb_ret;
11
12 do {
13 va_list args;
14 va_start(args, fmt);
15
16 wrote = vsnprintf(buf, buf_size, fmt, args);
17 if(wrote < (ssize_t)buf_size) {
18 if(wrote < 0) {
19 if(buf != scratch) FREEMEM(buf);
20 return -1;
21 }
22 break;
23 }
24
25 buf_size <<= 1;
26 if(buf == scratch) {
27 buf = MALLOC(buf_size);
28 if(!buf) return -1;
29 } else {
30 void *p = REALLOC(buf, buf_size);
31 if(!p) {
32 FREEMEM(buf);
33 return -1;
34 }
35 buf = p;
36 }
37 } while(1);
38
39 cb_ret = cb(buf, wrote, key);
40 if(buf != scratch) FREEMEM(buf);
41 if(cb_ret < 0) {
42 return -1;
43 }
44
45 return wrote;
46 }
47
48