static int eval_xlstr(struct sip_msg* msg, struct xlstr* s) {
static char* null_str = "";
int len;
if (s->xlfmt) {
len = xlbuf_size - (xlbuf_tail-xlbuf);
if (xl_print(msg, s->xlfmt, xlbuf_tail, &len) < 0) {
ERR(MODULE_NAME": eval_xlstr: Error while formatting result\n");
return E_UNSPEC;
}
/* note: xl_null value is returned as "<null>" string. It's pretty useless checking "if xlbuf_tail==xl_null then xlbuf_tail="";" because xl_null may be also inside string. What about implementing xl_set_nullstr to xl_lib? */
if ((xl_nul) && (xl_nul->len==len) && strncmp(xl_nul->s, xlbuf_tail, len)==0) {
s->s = null_str;
}
else {
s->s = xlbuf_tail;
s->s[len] = '\0';
xlbuf_tail += len+1;
}
}
else {
if (!s->s)
s->s = null_str;
}
return 0;
}
static int xl_printstr(struct sip_msg* msg, xl_elog_t* format, char** res, int* res_len)
{
int len;
if (!format || !res) {
LOG(L_ERR, "xl_printstr: Called with null format or res\n");
return -1;
}
if (!xlbuf) {
xlbuf = pkg_malloc((xlbuf_size+1)*sizeof(char));
if (!xlbuf) {
LOG(L_CRIT, "xl_printstr: No memory left for format buffer\n");
return -1;
}
}
len = xlbuf_size;
if (xl_print(msg, format, xlbuf, &len)<0) {
LOG(L_ERR, "xl_printstr: Error while formating result\n");
return -1;
}
if ((xl_nul) && (xl_nul->len == len) && !strncmp(xl_nul->s, xlbuf, len)) {
return 0;
}
*res = xlbuf;
if (res_len) {
*res_len=len;
}
return len;
}