/**
* slibc — Yet another C library
* Copyright © 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _STRINGS_H
#define _STRINGS_H
#include <slibc/version.h>
#include <slibc/features.h>
#define __NEED_size_t
#define __NEED_locale_t
#include <bits/types.h>
/**
* Override a memory segment with zeroes.
*
* @etymology (B)uffer: (zero) out.
*
* @param segment The memory segment to override.
* @param size The size of the memory segment.
*/
void bzero(void*, size_t)
__deprecated("Use 'memset', 'explicit_bzero' or 'secure_free' instead.");
#if defined(__SLIBC_SOURCE) || defined(__BSD_SOURCE)
/**
* Override a memory segment with zeroes.
*
* Unlike `bzero` and `memset`, calls to this function
* cannot be removed, as an optimisation, by the compiler.
*
* @etymology (Explicit) version of (`bzero`).
*
* @param segment The memory segment to override.
* @param size The size of the memory segment.
*/
void explicit_bzero(void*, size_t);
#endif
/**
* Copy a memory segment to another, possibly overlapping, segment.
*
* @etymology (B)uffer: (copy).
*
* @param whence The source memory segment.
* @param whither The destination memory segment.
* @param size The number of bytes to copy.
*/
void bcopy(const void*, void*, size_t)
__deprecated("Use 'memmove', or similar function, instead, but be aware of reordered parameters.");
/**
* This function is identical to `memcmp`.
*
* @etymology (B)uffer: (c)o(mp)are.
*/
int bcmp(const void*, const void*, size_t)
__deprecated("Use 'memcmp' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __pure__)));
/**
* Compare two strings alphabetically in a case insensitive manner.
* Be aware, only ASCII characters are case insensitive, non-ASCII
* characters are case sensitive.
*
* @etymology (Str)ing-function: (case) insensitive (c)o(mp)arison.
*
* @param a A negative value is returned if this is the lesser.
* @param b A positive value is returned if this is the lesser.
* @return Zero is returned if `a` and `b` are equal, otherwise,
* see the specifications for `a` and `b`.
*/
int strcasecmp(const char*, const char*)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
/**
* Compare two strings alphabetically in a case insensitive manner.
* Be aware, only ASCII characters are case insensitive, non-ASCII
* characters are case sensitive.
*
* @etymology (Str)ing-function: (n)-bytes, (case) insensitive (c)o(mp)arison.
*
* @param a A negative value is returned if this is the lesser.
* @param b A positive value is returned if this is the lesser.
* @param length The maximum number of characters to compare.
* @return Zero is returned if `a` and `b` are equal, otherwise,
* see the specifications for `a` and `b`.
*/
int strncasecmp(const char*, const char*, size_t)
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
/**
* Compare two strings alphabetically in a case insensitive manner.
* Be aware, only ASCII characters are case insensitive, non-ASCII
* characters are case sensitive.
*
* @etymology (`strcasecmp`) variant with (l)ocale-consideration.
*
* @param a A negative value is returned if this is the lesser.
* @param b A positive value is returned if this is the lesser.
* @param locale The locale.
* @return Zero is returned if `a` and `b` are equal, otherwise,
* see the specifications for `a` and `b`.
*/
int strcasecmp_l(const char*, const char*, locale_t) /* TODO */
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
/**
* Compare two strings alphabetically in a case insensitive manner.
* Be aware, only ASCII characters are case insensitive, non-ASCII
* characters are case sensitive.
*
* @etymology (`strncasecmp`) variant with (l)ocale-consideration.
*
* @param a A negative value is returned if this is the lesser.
* @param b A positive value is returned if this is the lesser.
* @param length The maximum number of characters to compare.
* @param locale The locale.
* @return Zero is returned if `a` and `b` are equal, otherwise,
* see the specifications for `a` and `b`.
*/
int strncasecmp_l(const char*, const char*, size_t, locale_t) /* TODO */
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
/**
* This function is identical to `strchr`.
*
* This is a deprecated BSD extension.
*
* @etymology (Index) of character.
*/
char* index(const char*, int)
__deprecated("Use 'strchr' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
#ifdef __CONST_CORRECT
# define index(...) (__const_correct(index, __VA_ARGS__))
#endif
/**
* This function is identical to `strrchr`.
*
* This is a deprecated BSD extension.
*
* @etymology (R)ight-most (index) of character.
*/
char* rindex(const char*, int)
__deprecated("Use 'strrchr' instead.")
__GCC_ONLY(__attribute__((__warn_unused_result__, __nonnull__, __pure__)));
#ifdef __CONST_CORRECT
# define rindex(...) (__const_correct(rindex, __VA_ARGS__))
#endif
/**
* Find the first set bit in an integer.
*
* @etymology (F)ind (f)irst (s)et bit on `int`.
*
* @param i The integer.
* @return The value of the least significant set bit, zero if none.
*/
int ffs(int)
__GCC_ONLY(__attribute__((__warn_unused_result__, __const__)));
/**
* Find the first set bit in an integer.
*
* @etymology (F)ind (f)irst (s)et bit on `(l)ong int`.
*
* @param i The integer.
* @return The value of the least significant set bit, zero if none.
*/
int ffsl(long)
__GCC_ONLY(__attribute__((__warn_unused_result__, __const__)));
/**
* Find the first set bit in an integer.
*
* @etymology (F)ind (f)irst (s)et bit on `(l)ong (l)ong int`.
*
* @param i The integer.
* @return The value of the least significant set bit, zero if none.
*/
int ffsll(long long)
__GCC_ONLY(__attribute__((__warn_unused_result__, __const__)));
#endif
