PROLOG<\/a> This manual page is part of the POSIX Programmer\u2019s Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.<\/p>\n strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l \u2014 case-insensitive string comparisons<\/p>\n #include int strcasecmp(const char *s1<\/i>, const char *s2<\/i>); The strcasecmp<\/i>() and strcasecmp_l<\/i>() functions shall compare, while ignoring differences in case, the string pointed to by s1<\/i> to the string pointed to by s2<\/i>. The strncasecmp<\/i>() and strncasecmp_l<\/i>() functions shall compare, while ignoring differences in case, not more than n<\/i> bytes from the string pointed to by s1<\/i> to the string pointed to by s2<\/i>.<\/p>\n The strcasecmp<\/i>() and strncasecmp<\/i>() functions use the current locale to determine the case of the characters.<\/p>\n The strcasecmp_l<\/i>() and strncasecmp_l<\/i>() functions use the locale represented by locale<\/i> to determine the case of the characters.<\/p>\n When the LC_CTYPE<\/i> category of the locale being used is from the POSIX locale, these functions shall behave as if the strings had been converted to lowercase and then a byte comparison performed. Otherwise, the results are unspecified.<\/p>\n The behavior is undefined if the locale<\/i> argument to strcasecmp_l<\/i>() or strncasecmp_l<\/i>() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle.<\/p>\n Upon completion, strcasecmp<\/i>() and strcasecmp_l<\/i>() shall return an integer greater than, equal to, or less than 0, if the string pointed to by s1<\/i> is, ignoring case, greater than, equal to, or less than the string pointed to by s2<\/i>, respectively.<\/p>\n Upon successful completion, strncasecmp<\/i>() and strncasecmp_l<\/i>() shall return an integer greater than, equal to, or less than 0, if the possibly null-terminated array pointed to by s1<\/i> is, ignoring case, greater than, equal to, or less than the possibly null-terminated array pointed to by s2<\/i>, respectively.<\/p>\n No errors are defined.<\/p>\n The following sections are informative.<\/i><\/p>\n None.<\/p>\n None.<\/p>\n None.<\/p>\n None.<\/p>\n wcscasecmp<\/i>()<\/p>\n
NAME<\/a>
SYNOPSIS<\/a>
DESCRIPTION<\/a>
RETURN VALUE<\/a>
ERRORS<\/a>
EXAMPLES<\/a>
APPLICATION USAGE<\/a>
RATIONALE<\/a>
FUTURE DIRECTIONS<\/a>
SEE ALSO<\/a>
COPYRIGHT<\/a> <\/p>\n
\nPROLOG <\/a> <\/h2>\n
NAME <\/a> <\/h2>\n
SYNOPSIS <\/a> <\/h2>\n
int strcasecmp_l(const char *s1<\/i>, const char *s2<\/i>,
locale_t locale<\/i>);
int strncasecmp(const char *s1<\/i>, const char *s2<\/i>, size_t n<\/i>);
int strncasecmp_l(const char *s1<\/i>, const char *s2<\/i>,
size_t n<\/i>, locale_t locale<\/i>);<\/p>\nDESCRIPTION <\/a> <\/h2>\n
RETURN VALUE <\/a> <\/h2>\n
ERRORS <\/a> <\/h2>\n
EXAMPLES <\/a> <\/h2>\n
APPLICATION USAGE <\/a> <\/h2>\n
RATIONALE <\/a> <\/h2>\n
FUTURE DIRECTIONS <\/a> <\/h2>\n
SEE ALSO <\/a> <\/h2>\n