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117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/**
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* Copyright (C) 2013 INRIA.
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @addtogroup posix
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* @{
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* @file
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* @brief string operations
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/strings.h.html">
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* The Open Group Base Specifications Issue 7, <strings.h>
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* </a>
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*
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* @author Freie Universität Berlin
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* @author Martin Lenders <mlenders@inf.fu-berlin.de>
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*/
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#ifndef STRINGS_H
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#define STRINGS_H
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#include <sys/types.h>
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/**
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* @brief Returns the position of the first (least significant) bit set in
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* integer i, or 0 if no bits are set in i.
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*
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* @param[in] i an integer number.
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*
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* @return Position (1 for least significant bit) of the first bit set,
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* 0 if no bits are set.
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/ffs.html">
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* The Open Group Base Specification Issue 7, ffs
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* </a>
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*/
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#define ffs(i) __builtin_ffs(i)
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/**
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* @brief Compares two strings s1 and s2, ignoring the case of the characters
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* for not more than n bytes from the strings.
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*
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* @param[in] s1 a string.
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* @param[in] s2 another string.
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* @param[in] n number of bytes to be compared
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*
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* @return A value greater 0 if, ignoring the case of the character, s1 is
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* greater than s2 up to n bytes, less than 0 if smaller, and 0 if
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* equal
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/strcasecmp.html">
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* The Open Group Base Specification Issue 7, strcasecmp
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* </a>
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*/
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int strncasecmp(const char *s1, const char *s2, size_t n);
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/**
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* @brief Compares two strings s1 and s2, ignoring the case of the characters
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* for not more than n bytes from the strings, but using the current
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* locale settings to determine the case.
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*
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* @note Since RIOT does not support locales (yet), this is just an
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* alias for strncasecmp()
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*
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* @param[in] s1 a string.
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* @param[in] s2 another string.
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* @param[in] n number of bytes to be compared
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*
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* @return A value greater 0 if, ignoring the case of the character, s1 is
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* greater than s2 up to n bytes, less than 0 if smaller, and 0 if
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* equal
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/strcasecmp.html">
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* The Open Group Base Specification Issue 7, strcasecmp
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* </a>
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*/
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#define strncasecmp_l(s1, s2, n, l) (strncasecmp(s1, s2, n))
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/**
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* @brief Compares two strings s1 and s2, ignoring the case of the characters.
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*
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* @param[in] s1 a string.
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* @param[in] s2 another string.
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*
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* @return A value greater 0 if, ignoring the case of the character, s1 is
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* greater than s2, less than 0 if smaller, and 0 if equal
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/strcasecmp.html">
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* The Open Group Base Specification Issue 7, strcasecmp
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* </a>
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*/
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#define strcasecmp(s1, s2) strncasecmp(s1, s2, -1)
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/**
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* @brief Compares two strings s1 and s2, ignoring the case of the characters,
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* but using the current locale settings to determine the case.
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*
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* @note Since RIOT does not support locales (yet), this is just an
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* alias for strcasecmp()
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*
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* @param[in] s1 a string.
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* @param[in] s2 another string.
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*
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* @return A value greater 0 if, ignoring the case of the character, s1 is
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* greater than s2, less than 0 if smaller, and 0 if equal
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*
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* @see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/strcasecmp.html">
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* The Open Group Base Specification Issue 7, strcasecmp
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* </a>
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*/
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#define strcasecmp_l(s1, s2, l) strncasecmp(s1, s2, -1)
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#endif /* STRINGS_H */
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