OPENSSL_STRCASECMP - Online Linux Manual PageSection : 3ossl
Updated : 2022-09-23
Source : 3.0.2
Note : OpenSSL
NAMEOPENSSL_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);
DESCRIPTIONThe 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 VALUESBoth 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.
NOTESOpenSSL 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.
COPYRIGHTCopyright 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>. 0
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