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document th way extensions are sorted

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@25613 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
rizzo 2006-05-08 15:32:53 +00:00
parent 030439550d
commit 313398d5d9
1 changed files with 27 additions and 7 deletions

34
pbx.c
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@ -3000,9 +3000,6 @@ static int show_dialplan_helper(int fd, char *context, char *exten, struct dialp
/* show this context? */
if (!context ||
!strcmp(ast_get_context_name(c), context)) {
dpc->context_existence = 1;
ast_lock_context(c);
/* XXX re-indent this block */
struct ast_exten *e;
struct ast_include *i;
@ -3011,6 +3008,9 @@ static int show_dialplan_helper(int fd, char *context, char *exten, struct dialp
char buf[256], buf2[256];
int context_info_printed = 0;
dpc->context_existence = 1;
ast_lock_context(c);
/* are we looking for exten too? if yes, we print context
* if we our extension only
*/
@ -4105,15 +4105,35 @@ static void null_datad(void *foo)
{
}
/*
/*! \brief
* Main interface to add extensions to the list for out context.
*
* We sort extensions in order of matching preference, so that we can
* stop the search as soon as we find a suitable match.
* This ordering also takes care of wildcards such as '.' (meaning
* "one or more of any character") and '!' (which is 'earlymatch',
* meaning "zero or more of any character" but also impacts the
* return value from CANMATCH and EARLYMATCH.
*
* The extension match rules defined in the devmeeting 2006.05.05 are
* quite simple: WE SELECT THE LONGEST MATCH.
* In detail, "longest" means the number of matched characters in
* the extension. In case of ties (e.g. _XXX and 333) in the length
* of a pattern, we give priority to entries with the smallest cardinality
* (e.g, [5-9] comes before [2-8] before the former has only 5 elements,
* while the latter has 7, etc.
* In case of same cardinality, the first element in the range counts.
* If we still have a tie, any final '!' will make this as a possibly
* less specific pattern.
*
* EBUSY - can't lock
* EEXIST - extension with the same priority exist and no replace is set
*
*/
int ast_add_extension2(struct ast_context *con,
int replace, const char *extension, int priority, const char *label, const char *callerid,
const char *application, void *data, void (*datad)(void *),
const char *registrar)
int replace, const char *extension, int priority, const char *label, const char *callerid,
const char *application, void *data, void (*datad)(void *),
const char *registrar)
{
#define LOG do { if (option_debug) {\