implemented tere_set_is_interrupted_cb()

Allows you to set up a callback that's invoked repeatedly during
matching. If it returns non-0 matching will abort and REG_EINTR is
returned.
Allows you to interrupt long-running regexp executions that would
otherwise block the UI or hang the entire application.

1 files changed, 3 insertions, 5 deletions

diff --git a/README.md b/README.md
index c35480e..6dbfbca 100644
--- a/README.md
+++ b/README.md
@@ -23,14 +23,12 @@ Compared to hsrex, this library has the following changes:
   `tere_comp()` compilation flag.
 * Support the `REG_ANCHORED` flag for `tere_exec()`.
 * `tere_free()` ignores nullified `regex_t` objects.
+* `tere_set_is_interrupted_cb()` allows configuring a repeatedly
+  invoked callback. If it returns true (non-null) matching aborts
+  immediately and `tere_exec()` will return `REG_EINTR`.
 
 ## TODO
 
-* Hook into the matching algorithm.
-  Even though runtime cannot be as catastrophically bad as in pure
-  backtracking engines like PCRE, `tere_exec()` calls can still be slow
-  on extremely large texts.
-  The hook allows interruptions.
 * Expose enough API to swap out the regular expression lexer.
   Useful for custom DSLs like glob patterns or TECO patterns.
 * Support splitting the subject string into two halves, so we can