[sr-dev] How to convert to integer the string value of an AVP

[Iñaki Baz Castillo]

Hi, I want to improve the regex module by allowing that the function
pcre_match_group() accepts a pseudo variable as second argument, to
get something like this:

  $avp(i:11) = 111;
  if pcre_match_group("$rU","$avp(i:11)")
    ...


So I'm modifying regex_mod.c:

- Before:
  { "pcre_match_group", (cmd_function)w_pcre_match_group, 2, fixup_spve_uint, 0,
		REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE }

- Now:
  { "pcre_match_group", (cmd_function)w_pcre_match_group, 2, fixup_spve_spve, 0,
		REQUEST_ROUTE|FAILURE_ROUTE|ONREPLY_ROUTE|BRANCH_ROUTE|LOCAL_ROUTE }


Then in the function code I do (just the additions):

-------------------------------------------------------------------------
static int w_pcre_match_group(struct sip_msg* _msg, char* _s1, char* _s2)
{
  str group;

  if (_s2 == NULL) {
    num_pcre = 0;
  } else {
    if (fixup_get_svalue(_msg, (gparam_p)_s2, &group))
    {
      LM_ERR("cannot print the format for second param\n");
      return -5;
    }
    num_pcre = (int)(long)group.s;
    LM_INFO("***debugging*** group.s = <%s> - group.len = <%i> -
num_pcre = <%i>\n", group.s, group.len, num_pcre);
}
------------------------------------------------------------------------

With the above example:
  $avp(i:11) = 111;
  if pcre_match_group("$rU","$avp(i:11)")

I get the following wrong outpu (num_pcre should be 111):

  INFO:regex:w_pcre_match_group: ***debugging*** group.s = <111> -
group.len = <3> - num_pcre = <7198368>


So, how to convert group.s into an integer? Thanks a lot for any help.


PS: I'm coding it in Kamailio 1.5.


-- 
Iñaki Baz Castillo
<ibc at aliax.net>