strcasecmp_l(3) [freebsd man page]

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

NAME

     strcasecmp, strncasecmp -- compare strings, ignoring case

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <strings.h>

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

     int
     strncasecmp(const char *s1, const char *s2, size_t len);

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

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

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

DESCRIPTION

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

     The strncasecmp() function compares at most len characters.  The strcasecmp_l() and strncasecmp_l() functions do the same as their non-locale
     versions above, but take an explicit locale rather than using the current locale.

RETURN VALUES

     The functions strcasecmp() and strncasecmp() return an integer greater than, equal to, or less than 0, depending on whether s1 is lexico-
     graphically greater than, equal to, or less than s2 after translation of each corresponding character to lower-case.  The strings themselves
     are not modified.	The comparison is done using unsigned characters, so that '200' is greater than ''.	The functions strcasecmp_l() and
     strncasecmp_l() do the same but take explicit locales.

SEE ALSO

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

HISTORY

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

BSD
								   May 29, 2014 							       BSD

STRCASECMP(3P)						     POSIX Programmer's Manual						    STRCASECMP(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l -- case-insensitive string comparisons

SYNOPSIS

       #include <strings.h>

       int strcasecmp(const char *s1, const char *s2);
       int strcasecmp_l(const char *s1, const char *s2,
	   locale_t locale);
       int strncasecmp(const char *s1, const char *s2, size_t n);
       int strncasecmp_l(const char *s1, const char *s2,
	   size_t n, locale_t locale);

DESCRIPTION

       The strcasecmp() and strcasecmp_l() functions shall compare, while ignoring differences in case, the string pointed to by s1 to the  string
       pointed to by s2.  The strncasecmp() and strncasecmp_l() functions shall compare, while ignoring differences in case, not more than n bytes
       from the string pointed to by s1 to the string pointed to by s2.

       The strcasecmp() and strncasecmp() functions use the current locale to determine the case of the characters.

       The strcasecmp_l() and strncasecmp_l() functions use the locale represented by locale to determine the case of the characters.

       When the LC_CTYPE category of the locale being used is from the POSIX locale, these functions shall behave as if the strings had been  con-
       verted to lowercase and then a byte comparison performed. Otherwise, the results are unspecified.

       The  behavior  is undefined if the locale argument to strcasecmp_l() or strncasecmp_l() is the special locale object LC_GLOBAL_LOCALE or is
       not a valid locale object handle.

RETURN VALUE

       Upon completion, strcasecmp() and strcasecmp_l() shall return an integer greater than, equal to, or less than 0, if the string  pointed	to
       by s1 is, ignoring case, greater than, equal to, or less than the string pointed to by s2, respectively.

       Upon successful completion, strncasecmp() and strncasecmp_l() shall return an integer greater than, equal to, or less than 0, if the possi-
       bly null-terminated array pointed to by s1 is, ignoring case, greater than, equal to, or  less  than  the  possibly  null-terminated  array
       pointed to by s2, respectively.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       wcscasecmp()

       The Base Definitions volume of POSIX.1-2008, <strings.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							    STRCASECMP(3P)