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| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Code for strtol/strtoul |
| Date | 2015-03-29 08:49 +1300 |
| Message-ID | <cnoeueFobieU1@mid.individual.net> (permalink) |
| References | <mejjh4$i17$1@speranza.aioe.org> <cnncb9Foba2U1@mid.individual.net> <87ego98igi.fsf@bsb.me.uk> |
Ben Bacarisse wrote: > Ian Collins <ian-news@hotmail.com> writes: > >> jacob navia wrote: >> >>> What to do with weird cases? For instance the sequence >>> >>> strtol( >>> "56724399879677657653445435435456765675755435435432223444465444565466654666ULL", >>> &endptr,10); >>> >>> I developed a formula for calculating the maximum number of digits to >>> read for a number base N. Is that formula correct? >> >> That calculation appears to be impacting the performance of your routine. >> >> Being a another quiet weekend, I got bored and wrote a test wrapper >> that creates an array of 1000 random number strings and then cycles >> them 10000 times to perform enough conversions for a decent elapsed >> time. >> >> Compiled with gcc -O3, your version takes ~9.9 seconds, my version >> ~6.4 seconds. Considering the only significant difference is I don't >> bother calculating the maximum number of digits, it probably isn't a >> good thing to do. > > But at least in your case, the code does not correctly scan the whole > string of digits, so that might be another difference depending on how > many ling strings your test includes. In this test, none. Adding ~8% of excessively long strings added about 0.2 seconds to my version. I had corrected the not swallowing all valid digits bug. -- Ian Collins
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Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 12:09 +0100
Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-21 11:33 +0000
Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-21 11:47 +0000
Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-21 15:58 +0000
Re: Code for strtol/strtoul Lőrinczy Zsigmond <nospam@for.me> - 2015-03-21 16:10 +0100
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 16:34 +0100
Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-21 16:10 +0000
Re: Code for strtol/strtoul James Kuyper <jameskuyper@verizon.net> - 2015-03-21 12:53 -0400
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 14:18 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 22:46 +0100
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 15:23 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-21 23:42 +0100
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 16:06 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-22 00:29 +0100
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 20:18 -0700
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-21 15:54 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-22 08:34 +0100
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 19:42 -0700
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-25 10:40 -0700
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 16:17 -0700
Re: Code for strtol/strtoul Keith Thompson <kst-u@mib.org> - 2015-03-25 20:27 -0700
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 09:08 -0700
Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-21 15:53 +0000
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 21:50 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 06:54 +0100
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 19:18 +1300
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 09:57 +0100
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 07:07 +1300
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 14:22 +1300
Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 00:17 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-28 12:07 +1300
Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-28 02:53 -0700
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:19 -0700
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 16:13 -0700
Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-25 13:42 +0000
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 17:20 -0700
Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-26 04:16 +0000
Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 00:27 -0700
Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-26 13:44 +0000
Re: Code for strtol/strtoul fir <profesor.fir@gmail.com> - 2015-03-26 07:13 -0700
Re: Code for strtol/strtoul asetofsymbols@gmail.com - 2015-03-26 08:30 -0700
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:13 +0000
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 09:47 -0700
Re: Code for strtol/strtoul Greg Martin <greg.at.softsprocket@dot.com> - 2015-03-26 15:00 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 07:12 +1300
Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-26 19:11 +0000
Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-26 15:09 -0700
Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-26 22:13 +0000
Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-26 15:20 -0700
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-30 09:59 +0000
Re: Code for strtol/strtoul Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-03-30 06:38 -0700
Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-30 14:41 +0100
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-04-06 12:52 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 18:07 +1300
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:17 +0000
Re: Code for strtol/strtoul Kaz Kylheku <kaz@kylheku.com> - 2015-03-29 15:26 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-30 07:09 +1300
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-30 10:02 +0000
Re: Code for strtol/strtoul Bartc <bc@freeuk.com> - 2015-03-29 18:53 +0100
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 15:38 -0700
Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-21 16:48 -0500
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-22 20:45 +1300
Re: Code for strtol/strtoul Ike Naar <ike@iceland.freeshell.org> - 2015-03-23 09:40 +0000
Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-23 09:46 +0000
Re: Code for strtol/strtoul Reinhardt Behm <rbehm@hushmail.com> - 2015-03-23 18:44 +0800
Re: Code for strtol/strtoul Les Cargill <lcargill99@comcast.com> - 2015-03-23 20:29 -0500
Re: Code for strtol/strtoul Richard Heathfield <rjh@cpax.org.uk> - 2015-03-24 08:12 +0000
Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-23 05:27 -0500
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-24 07:03 +1300
Re: Code for strtol/strtoul Ike Naar <ike@iceland.freeshell.org> - 2015-03-23 22:40 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-24 17:17 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 21:42 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 17:55 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:43 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-26 14:15 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-28 14:53 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 11:04 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-30 12:34 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-31 21:20 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-24 22:31 -0700
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-25 19:30 +1300
Re: Code for strtol/strtoul Tim Rentsch <txr@alumni.caltech.edu> - 2015-03-25 08:24 -0700
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-25 22:43 +0100
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-27 19:18 +1300
Re: Code for strtol/strtoul Steve Thompson <stevet810@gmail.com> - 2015-03-27 15:02 +0000
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-27 16:10 +0100
Re: Code for strtol/strtoul Steve Thompson <stevet810@gmail.com> - 2015-03-27 22:44 +0000
Re: Code for strtol/strtoul raltbos@xs4all.nl (Richard Bos) - 2015-03-29 15:18 +0000
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-29 17:35 +0200
Re: Code for strtol/strtoul Robert Wessel <robertwessel2@yahoo.com> - 2015-03-28 03:57 -0500
Re: Code for strtol/strtoul jacob navia <jacob@jacob.remcomp.fr> - 2015-03-28 14:09 +0100
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-28 22:58 +1300
Re: Code for strtol/strtoul Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-03-28 11:33 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 08:49 +1300
Re: Code for strtol/strtoul Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-03-28 22:11 +0000
Re: Code for strtol/strtoul Ian Collins <ian-news@hotmail.com> - 2015-03-29 11:30 +1300
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