Re: regexp-exec fails for long strings
From: =?iso-8859-1?Q?Wolfgang_J=E4hrling?= [EMAIL PROTECTED] Date: Wed, 15 May 2002 08:04:20 +0200 AFAIK, the glibc-people are rewriting the regex code for 2.3, because the current implementation got unmaintainable and has various strange limitations. This could be one of those. that's good news (that i wouldn't have known w/o this tip -- thanks!). i suppose i could contribute this as a test case. i wonder what glibc testing framework is like. thi ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
Re: regexp-exec fails for long strings
From: Thien-Thi Nguyen [EMAIL PROTECTED] Date: Thu, 25 Apr 2002 16:29:40 -0700 i traced this to `regexec' (glibc 2.2.4) and stopped -- it's not a guile bug after all, as far as i could tell. (also, could not reproduce the behavior under FreeBSD 4.4-RELEASE.) probably time to apt-get update... this problem persists w/ glibc 2.2.5. hmmm thi ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
Re: regexp-exec fails for long strings
Thien-Thi Nguyen [EMAIL PROTECTED] wrote: From: Thien-Thi Nguyen [EMAIL PROTECTED] Date: Thu, 25 Apr 2002 16:29:40 -0700 i traced this to `regexec' (glibc 2.2.4) and stopped -- it's not a guile bug after all, as far as i could tell. (also, could not reproduce the behavior under FreeBSD 4.4-RELEASE.) probably time to apt-get update... this problem persists w/ glibc 2.2.5. hmmm AFAIK, the glibc-people are rewriting the regex code for 2.3, because the current implementation got unmaintainable and has various strange limitations. This could be one of those. Cheers, GNU/Wolfgang -- Wolfgang Jährling [EMAIL PROTECTED] \\ http://stdio.cjb.net/ Debian GNU/Hurd user Debian GNU/Linux user \\ http://www.gnu.org/ The Hurd Hacking Guide: http://www.gnu.org/software/hurd/hacking-guide/ [We're way ahead of you here. The Hurd has always been on the] [ cutting edge of not being good for anything. -- Roland McGrath ] ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
Re: regexp-exec fails for long strings
On Thu, Apr 25, 2002 at 01:05:50PM -0700, Thien-Thi Nguyen wrote: [...] if someone can confirm similar behavior on another system (perhaps by varying the appended string length), i will add this to the bugs db. (i ask for this confirmation because my system's old sdrams are prone to mysterious failures, and i want to rule that out as a reason.) Ok, this is on my rather 'old' guile-1.5 box (the guile-HEAD is at home): | guile (version) | 1.5.0 | guile (use-modules (ice-9 regex)) | guile | guile (define ok section_nameProjects List/section_name) | guile | guile (define rx (make-regexp section_name(.*)/section_name)) | guile | guile (define (+space s n) | ... (string-append s (make-string n #\space))) | guile | guile (define (test s) | ... (format #t string-length ~A\t= ~A\n | ... (string-length s) | ... (if (regexp-exec rx s) | ... ok | ... FAIL))) | guile (test ok) | string-length 42 = ok | guile (test (+space ok 11672)) | string-length 11714 = ok | guile (test (+space ok 11673)) | string-length 11715 = ok | guile (test (+space ok 11674)) | string-length 11716 = FAIL | guile (test (+space ok 11675)) | string-length 11717 = FAIL | guile (test (+space ok 11700)) | string-length 11742 = FAIL | guile | Hmmm, never really used guile's regex heavily - that's where i still use blushperl/blush. Ralf thi (use-modules (ice-9 regex)) (define ok section_nameProjects List/section_name) (define rx (make-regexp section_name(.*)/section_name)) (define (+space s n) (string-append s (make-string n #\space))) (define (test s) (format #t string-length ~A\t= ~A\n (string-length s) (if (regexp-exec rx s) ok FAIL))) ;; do it (test ok) ; ok (test (+space ok 11672)); ok (test (+space ok 11673)); ok (test (+space ok 11674)); FAIL (test (+space ok 11675)); FAIL (test (+space ok 11700)); FAIL ___ Guile-user mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/guile-user ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
Re: regexp-exec fails for long strings
From: [EMAIL PROTECTED] Date: Thu, 25 Apr 2002 23:47:13 +0200 | guile (test ok) | string-length 42 = ok | guile (test (+space ok 11672)) | string-length 11714 = ok | guile (test (+space ok 11673)) | string-length 11715 = ok | guile (test (+space ok 11674)) | string-length 11716 = FAIL | guile (test (+space ok 11675)) | string-length 11717 = FAIL | guile (test (+space ok 11700)) | string-length 11742 = FAIL | guile i traced this to `regexec' (glibc 2.2.4) and stopped -- it's not a guile bug after all, as far as i could tell. (also, could not reproduce the behavior under FreeBSD 4.4-RELEASE.) probably time to apt-get update... thi ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
Re: regexp-exec fails for long strings
Hmmm, never really used guile's regex heavily - that's where i still use blushperl/blush. If you want high-power regexps, you should resurrect the Rx interface, grabbing the latest libhackerlab. In fact, rather than resurrecting the old Guile Rx interface, you should grab and adapt the one from systas (not currently in release, but I'll put up a new version soon). I regularly use regexps that are several KB long, constructed by a structured regexp compiler similar to the one in SCSH. It's fast, convenient, and very accurate. -t ___ Bug-guile mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-guile
