From 4fe5bc6f3867096965270c90f2e1e5df77b8825f Mon Sep 17 00:00:00 2001 From: Robin Haberkorn Date: Sun, 28 Jun 2026 00:39:51 +0200 Subject: terex is the new regular expression engine now and replaces PCRE (GRegex) * terex is based on Henry Spencer's regular expression engine for Tcl. It is a hybrid NFA/DFA design which has better worst-time runtimes than the backtracking PCRE. Memory usage is also limited and can no longer increase catastrophically. * It should no longer be possible to crash SciTECO with pathological searches. * Since it reliably supports partial matches (REG_EXPECT) we can now enable the new backwards-search algorithm by default. This used to be broken because of a glib bug, which I already fixed. It would however take a long time until this ends up on the majority of glib installations. * Regexp executions can still be quite slow if you are looking for a pattern at the end of a huge file, which can hang the editor, but this can now at least theoretically be solved by adding hooks into terex to poll for interruptions. * We can now also get rid of a TECO-pattern to regexp translation step by directly generating terex tokens (TODO). * Performance-wise terex appears to be slower than PCRE for simple forward searches even when linking everything with optimzations (FIXME). * Having a stand-alone regular expression engine is also a huge step in getting rid of glib. See also: https://git.fmsbw.de/terex/about/ --- src/core-commands.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'src/core-commands.c') diff --git a/src/core-commands.c b/src/core-commands.c index 5ca508c..81d5869 100644 --- a/src/core-commands.c +++ b/src/core-commands.c @@ -2224,8 +2224,7 @@ teco_state_ecommand_flags(teco_machine_main_t *ctx, GError **error) * Only this setting guarantees leftmost longest matches that * are entirely symmetric to forward searches, but can be * unpractically slow on huge files. - * The default is 0. - * \# FIXME: Feature is currently broken! + * The default is 4kb. * . * .IP -1: * Type of the last mouse event (\fBread-only\fP). -- cgit v1.2.3