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strcoll(3) [bsd man page]

STRCOLL(3)						     Linux Programmer's Manual							STRCOLL(3)

NAME
strcoll - compare two strings using the current locale SYNOPSIS
#include <string.h> int strcoll(const char *s1, const char *s2); DESCRIPTION
The strcoll() function compares the two strings s1 and s2. It returns an integer less than, equal to, or greater than zero if s1 is found, respectively, to be less than, to match, or be greater than s2. The comparison is based on strings interpreted as appropriate for the pro- gram's current locale for category LC_COLLATE. (See setlocale(3).) RETURN VALUE
The strcoll() function returns an integer less than, equal to, or greater than zero if s1 is found, respectively, to be less than, to match, or be greater than s2, when both are interpreted as appropriate for the current locale. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+----------------+ |Interface | Attribute | Value | +----------+---------------+----------------+ |strcoll() | Thread safety | MT-Safe locale | +----------+---------------+----------------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD. NOTES
In the POSIX or C locales strcoll() is equivalent to strcmp(3). SEE ALSO
bcmp(3), memcmp(3), setlocale(3), strcasecmp(3), strcmp(3), string(3), strxfrm(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 STRCOLL(3)

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STRCASECMP(3)						     Linux Programmer's Manual						     STRCASECMP(3)

NAME
strcasecmp, strncasecmp - compare two strings ignoring case SYNOPSIS
#include <strings.h> int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t n); DESCRIPTION
The strcasecmp() function performs a byte-by-byte comparison of the strings s1 and s2, ignoring the case of the characters. It returns an integer less than, equal to, or greater than zero if s1 is found, respectively, to be less than, to match, or be greater than s2. The strncasecmp() function is similar, except that it compares no more than n bytes of s1 and s2. RETURN VALUE
The strcasecmp() and strncasecmp() functions return an integer less than, equal to, or greater than zero if s1 is, after ignoring case, found to be less than, to match, or be greater than s2, respectively. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------------------------+---------------+----------------+ |Interface | Attribute | Value | +----------------------------+---------------+----------------+ |strcasecmp(), strncasecmp() | Thread safety | MT-Safe locale | +----------------------------+---------------+----------------+ CONFORMING TO
4.4BSD, POSIX.1-2001, POSIX.1-2008. NOTES
The strcasecmp() and strncasecmp() functions first appeared in 4.4BSD, where they were declared in <string.h>. Thus, for reasons of his- torical compatibility, the glibc <string.h> header file also declares these functions, if the _DEFAULT_SOURCE (or, in glibc 2.19 and ear- lier, _BSD_SOURCE) feature test macro is defined. The POSIX.1-2008 standard says of these functions: 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 converted to lowercase and then a byte comparison performed. Otherwise, the results are unspecified. SEE ALSO
bcmp(3), memcmp(3), strcmp(3), strcoll(3), string(3), strncmp(3), wcscasecmp(3), wcsncasecmp(3) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. 2017-09-15 STRCASECMP(3)

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