OPENSSL_STRCASECMP(3ossl) OpenSSL OPENSSL_STRCASECMP(3ossl)
NAME
OPENSSL_strcasecmp, OPENSSL_strncasecmp - compare two strings ignoring
case
SYNOPSIS
#include <openssl/crypto.h>
int OPENSSL_strcasecmp(const char *s1, const char *s2);
int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n);
DESCRIPTION
The OPENSSL_strcasecmp function performs a byte-by-byte comparison of
the strings s1 and s2, ignoring the case of the characters.
The OPENSSL_strncasecmp function is similar, except that it compares no
more than n bytes of s1 and s2.
In POSIX-compatible system and on Windows these functions use "C"
locale for case insensitive. Otherwise the comparison is done in
current locale.
RETURN VALUES
Both functions return 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.
NOTES
OpenSSL extensively uses case insensitive comparison of ASCII strings.
Though OpenSSL itself is locale-agnostic, the applications using
OpenSSL libraries may unpredictably suffer when they use localization
(e.g. Turkish locale is well-known with a specific I/i cases). These
functions use C locale for string comparison.
COPYRIGHT
Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 OPENSSL_STRCASECMP(3ossl)
openssl 3.3.2 - Generated Mon Sep 16 16:17:33 CDT 2024