topic Re: String comparision in Operating System - OpenVMS

String comparision

ram_47 — Fri, 05 Aug 2005 05:38:46 GMT

Any string ‘case-insensitive’ comparison function available on Alpha?

Re: String comparision

Volker Halle — Fri, 05 Aug 2005 05:57:25 GMT

Ram,

there is strncasecmp ( see $ HELP CRTL ) and there is also STR$CASE_BLIND_COMPARE ( see $ HELP LIB STR$ )

The CRTL routines may depend on your version of OpenVMS, the STR$ routines are always available.

Volker.

Re: String comparision

Martin Vorlaender — Fri, 05 Aug 2005 05:59:29 GMT

ram,

this heavily depends on your VMS version. More recent versions of the C runtime library (that comes with the OS!) know the str(n)casecmp function.

And then there's the VMS String manipulation library with its STR$CASE_BLIND_COMPARE , see http://h71000.www7.hp.com/doc/73final/5936/5936pro_003.html#5936case_blind_compare_4

cu,
Martin

Re: String comparision

Jan van den Ende — Fri, 05 Aug 2005 06:15:02 GMT

ram,

if this question is about functions within a compiled language, see Volker & Martin.

It it is about DCL, then the default comparison is case-sensitive.
For case-blind, use:
$ f$edit(string_a,"upcase") .eqs. f$edit(string_b,"upcase")

of course, instead of .eqs. (EQualString) you can also use .nes. (NotEqualString), .gts. (GreaterThenString), .ges. (Greater or Equal String), .lts. or .les.

hth

Proost.

Have one on me.

jpe

Re: String comparision

ram_47 — Fri, 05 Aug 2005 07:10:23 GMT

what header do we need to include for these routines?

Re: String comparision

Martin Vorlaender — Fri, 05 Aug 2005 07:14:06 GMT

$ HELP CC RUN-TIME strncasecmp

says it's

cu,
Martin

Re: String comparision

Antoniov. — Fri, 05 Aug 2005 09:48:17 GMT

Hi Ram,
the best practise to use case insensitive function in c language is use of strcasecmp and strncasecmp.
Type
$ HELP CC RUN STRCASECMP
$ HELP CC RUN STRNCASECMP

Antonio Vigliotti

Re: String comparision

Antoniov. — Fri, 05 Aug 2005 09:51:18 GMT

I use these definition to keep compatibility with other platform:
#define stricmp STRCASECMP
#define strnicmp STRNCASECMP

Warning: strcasecmp and strncasecomp are avaiable only from V7.0 of VMS. If you want to compile with V6 compatibility you can't use these function.

Antonio Vigliotti