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string.h
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string.h
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/* Copyright (c) 2002,2007 Marek Michalkiewicz
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
/* $Id: string.h 2503 2016-02-07 22:59:47Z joerg_wunsch $ */
/*
string.h
Contributors:
Created by Marek Michalkiewicz <[email protected]>
*/
#ifndef _STRING_H_
#define _STRING_H_ 1
#ifndef __DOXYGEN__
#define __need_NULL
#define __need_size_t
#include <stddef.h>
#ifndef __ATTR_PURE__
#define __ATTR_PURE__ __attribute__((__pure__))
#endif
#ifndef __ATTR_CONST__
# define __ATTR_CONST__ __attribute__((__const__))
#endif
#endif /* !__DOXYGEN__ */
#ifdef __cplusplus
extern "C" {
#endif
/** \file */
/** \defgroup avr_string <string.h>: Strings
\code #include <string.h> \endcode
The string functions perform string operations on NULL terminated
strings.
\note If the strings you are working on resident in program space (flash),
you will need to use the string functions described in \ref avr_pgmspace. */
/** \ingroup avr_string
This macro finds the first (least significant) bit set in the
input value.
This macro is very similar to the function ffs() except that
it evaluates its argument at compile-time, so it should only
be applied to compile-time constant expressions where it will
reduce to a constant itself.
Application of this macro to expressions that are not constant
at compile-time is not recommended, and might result in a huge
amount of code generated.
\returns The _FFS() macro returns the position of the first
(least significant) bit set in the word val, or 0 if no bits are set.
The least significant bit is position 1. Only 16 bits of argument
are evaluted.
*/
#if defined(__DOXYGEN__)
#define _FFS(x)
#else /* !DOXYGEN */
#define _FFS(x) \
(1 \
+ (((x) & 1) == 0) \
+ (((x) & 3) == 0) \
+ (((x) & 7) == 0) \
+ (((x) & 017) == 0) \
+ (((x) & 037) == 0) \
+ (((x) & 077) == 0) \
+ (((x) & 0177) == 0) \
+ (((x) & 0377) == 0) \
+ (((x) & 0777) == 0) \
+ (((x) & 01777) == 0) \
+ (((x) & 03777) == 0) \
+ (((x) & 07777) == 0) \
+ (((x) & 017777) == 0) \
+ (((x) & 037777) == 0) \
+ (((x) & 077777) == 0) \
- (((x) & 0177777) == 0) * 16)
#endif /* DOXYGEN */
extern int ffs (int __val) __ATTR_CONST__;
extern int ffsl (long __val) __ATTR_CONST__;
__extension__ extern int ffsll (long long __val) __ATTR_CONST__;
extern void *memccpy(void *, const void *, int, size_t);
extern void *memchr(const void *, int, size_t) __ATTR_PURE__;
extern int memcmp(const void *, const void *, size_t) __ATTR_PURE__;
extern void *memcpy(void *, const void *, size_t);
extern void *memmem(const void *, size_t, const void *, size_t) __ATTR_PURE__;
extern void *memmove(void *, const void *, size_t);
extern void *memrchr(const void *, int, size_t) __ATTR_PURE__;
extern void *memset(void *, int, size_t);
extern char *strcat(char *, const char *);
extern char *strchr(const char *, int) __ATTR_PURE__;
extern char *strchrnul(const char *, int) __ATTR_PURE__;
extern int strcmp(const char *, const char *) __ATTR_PURE__;
extern char *strcpy(char *, const char *);
extern int strcasecmp(const char *, const char *) __ATTR_PURE__;
extern char *strcasestr(const char *, const char *) __ATTR_PURE__;
extern size_t strcspn(const char *__s, const char *__reject) __ATTR_PURE__;
extern char *strdup(const char *s1);
extern size_t strlcat(char *, const char *, size_t);
extern size_t strlcpy(char *, const char *, size_t);
extern size_t strlen(const char *) __ATTR_PURE__;
extern char *strlwr(char *);
extern char *strncat(char *, const char *, size_t);
extern int strncmp(const char *, const char *, size_t) __ATTR_PURE__;
extern char *strncpy(char *, const char *, size_t);
extern int strncasecmp(const char *, const char *, size_t) __ATTR_PURE__;
extern size_t strnlen(const char *, size_t) __ATTR_PURE__;
extern char *strpbrk(const char *__s, const char *__accept) __ATTR_PURE__;
extern char *strrchr(const char *, int) __ATTR_PURE__;
extern char *strrev(char *);
extern char *strsep(char **, const char *);
extern size_t strspn(const char *__s, const char *__accept) __ATTR_PURE__;
extern char *strstr(const char *, const char *) __ATTR_PURE__;
extern char *strtok(char *, const char *);
extern char *strtok_r(char *, const char *, char **);
extern char *strupr(char *);
#ifndef __DOXYGEN__
/* libstdc++ compatibility, dummy declarations */
extern int strcoll(const char *s1, const char *s2);
extern char *strerror(int errnum);
extern size_t strxfrm(char *dest, const char *src, size_t n);
#endif /* !__DOXYGEN__ */
#ifdef __cplusplus
}
#endif
#endif /* _STRING_H_ */