Mac Developer Library Developer


This manual page is part of Xcode Tools version 5.0

To obtain these tools:

If you are running a version of Xcode Tools other than 5.0, view the documentation locally:

  • In Xcode

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

STRCASECMP(3)            BSD Library Functions Manual            STRCASECMP(3)

     strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l -- compare strings, ignoring case

     Standard C Library (libc, -lc)

     #include <strings.h>

     strcasecmp(const char *s1, const char *s2);

     strncasecmp(const char *s1, const char *s2, size_t n);

     #include <strings.h>
     #include <xlocale.h>

     strcasecmp_l(const char *s1, const char *s2, locale_t loc);

     strncasecmp_l(const char *s1, const char *s2, size_t n, locale_t loc);

     The strcasecmp() and strncasecmp() functions compare the null-terminated strings s1 and s2.

     The strncasecmp() compares at most n characters.

     Although the strcasecmp() and strncasecmp() functions use the current locale, the strcasecmp_l() and
     strncasecmp_l() functions may be passed locales directly. See xlocale(3) for more information.

     The strcasecmp() and strncasecmp() return an integer greater than, equal to, or less than 0, according
     as s1 is lexicographically greater than, equal to, or less than s2 after translation of each corre-sponding corresponding
     sponding character to lower-case.  The strings themselves are not modified.  The comparison is done
     using unsigned characters, so that `\200' is greater than `\0'.

     bcmp(3), memcmp(3), strcmp(3), strcoll(3), strxfrm(3), tolower(3), xlocale(3)

     The strcasecmp() and strncasecmp() functions first appeared in 4.4BSD.  Their prototypes existed previ-ously previously
     ously in <string.h> before they were moved to <strings.h> for IEEE Std 1003.1-2001 (``POSIX.1'') com-pliance. compliance.

BSD                              June 9, 1993                              BSD

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.