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avr-libc  2.0.0
Standard C library for AVR-GCC

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string.h
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00001 /* Copyright (c) 2002,2007 Marek Michalkiewicz
00002    All rights reserved.
00003 
00004    Redistribution and use in source and binary forms, with or without
00005    modification, are permitted provided that the following conditions are met:
00006 
00007    * Redistributions of source code must retain the above copyright
00008      notice, this list of conditions and the following disclaimer.
00009 
00010    * Redistributions in binary form must reproduce the above copyright
00011      notice, this list of conditions and the following disclaimer in
00012      the documentation and/or other materials provided with the
00013      distribution.
00014 
00015    * Neither the name of the copyright holders nor the names of
00016      contributors may be used to endorse or promote products derived
00017      from this software without specific prior written permission.
00018 
00019   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00020   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00023   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00024   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00025   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00026   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00027   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00028   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00029   POSSIBILITY OF SUCH DAMAGE. */
00030 
00031 /* $Id: string.h 2503 2016-02-07 22:59:47Z joerg_wunsch $ */
00032 
00033 /*
00034    string.h
00035 
00036    Contributors:
00037      Created by Marek Michalkiewicz <marekm@linux.org.pl>
00038  */
00039 
00040 #ifndef _STRING_H_
00041 #define _STRING_H_ 1
00042 
00043 #ifndef __DOXYGEN__
00044 #define __need_NULL
00045 #define __need_size_t
00046 #include <stddef.h>
00047 
00048 #ifndef __ATTR_PURE__
00049 #define __ATTR_PURE__ __attribute__((__pure__))
00050 #endif
00051 
00052 #ifndef __ATTR_CONST__
00053 # define __ATTR_CONST__ __attribute__((__const__))
00054 #endif
00055 #endif  /* !__DOXYGEN__ */
00056 
00057 #ifdef __cplusplus
00058 extern "C" {
00059 #endif
00060 
00061 /** \file */
00062 /** \defgroup avr_string <string.h>: Strings
00063     \code #include <string.h> \endcode
00064 
00065     The string functions perform string operations on NULL terminated
00066     strings. 
00067 
00068     \note If the strings you are working on resident in program space (flash),
00069     you will need to use the string functions described in \ref avr_pgmspace. */
00070 
00071 
00072 /** \ingroup avr_string
00073 
00074     This macro finds the first (least significant) bit set in the
00075     input value.
00076 
00077     This macro is very similar to the function ffs() except that
00078     it evaluates its argument at compile-time, so it should only
00079     be applied to compile-time constant expressions where it will
00080     reduce to a constant itself.
00081     Application of this macro to expressions that are not constant
00082     at compile-time is not recommended, and might result in a huge
00083     amount of code generated.
00084 
00085     \returns The _FFS() macro returns the position of the first
00086     (least significant) bit set in the word val, or 0 if no bits are set.
00087     The least significant bit is position 1.  Only 16 bits of argument
00088     are evaluted.
00089 */
00090 #if defined(__DOXYGEN__)
00091 #define _FFS(x)
00092 #else  /* !DOXYGEN */
00093 #define _FFS(x) \
00094     (1              \
00095      + (((x) & 1) == 0)     \
00096      + (((x) & 3) == 0)     \
00097      + (((x) & 7) == 0)     \
00098      + (((x) & 017) == 0)       \
00099      + (((x) & 037) == 0)       \
00100      + (((x) & 077) == 0)       \
00101      + (((x) & 0177) == 0)      \
00102      + (((x) & 0377) == 0)      \
00103      + (((x) & 0777) == 0)      \
00104      + (((x) & 01777) == 0)     \
00105      + (((x) & 03777) == 0)     \
00106      + (((x) & 07777) == 0)     \
00107      + (((x) & 017777) == 0)    \
00108      + (((x) & 037777) == 0)    \
00109      + (((x) & 077777) == 0)    \
00110      - (((x) & 0177777) == 0) * 16)
00111 #endif /* DOXYGEN */
00112 
00113 extern int ffs (int __val) __ATTR_CONST__;
00114 extern int ffsl (long __val) __ATTR_CONST__;
00115 __extension__ extern int ffsll (long long __val) __ATTR_CONST__;
00116 extern void *memccpy(void *, const void *, int, size_t);
00117 extern void *memchr(const void *, int, size_t) __ATTR_PURE__;
00118 extern int memcmp(const void *, const void *, size_t) __ATTR_PURE__;
00119 extern void *memcpy(void *, const void *, size_t);
00120 extern void *memmem(const void *, size_t, const void *, size_t) __ATTR_PURE__;
00121 extern void *memmove(void *, const void *, size_t);
00122 extern void *memrchr(const void *, int, size_t) __ATTR_PURE__;
00123 extern void *memset(void *, int, size_t);
00124 extern char *strcat(char *, const char *);
00125 extern char *strchr(const char *, int) __ATTR_PURE__;
00126 extern char *strchrnul(const char *, int) __ATTR_PURE__;
00127 extern int strcmp(const char *, const char *) __ATTR_PURE__;
00128 extern char *strcpy(char *, const char *);
00129 extern int strcasecmp(const char *, const char *) __ATTR_PURE__;
00130 extern char *strcasestr(const char *, const char *) __ATTR_PURE__;
00131 extern size_t strcspn(const char *__s, const char *__reject) __ATTR_PURE__;
00132 extern char *strdup(const char *s1);
00133 extern size_t strlcat(char *, const char *, size_t);
00134 extern size_t strlcpy(char *, const char *, size_t);
00135 extern size_t strlen(const char *) __ATTR_PURE__;
00136 extern char *strlwr(char *);
00137 extern char *strncat(char *, const char *, size_t);
00138 extern int strncmp(const char *, const char *, size_t) __ATTR_PURE__;
00139 extern char *strncpy(char *, const char *, size_t);
00140 extern int strncasecmp(const char *, const char *, size_t) __ATTR_PURE__;
00141 extern size_t strnlen(const char *, size_t) __ATTR_PURE__;
00142 extern char *strpbrk(const char *__s, const char *__accept) __ATTR_PURE__;
00143 extern char *strrchr(const char *, int) __ATTR_PURE__;
00144 extern char *strrev(char *);
00145 extern char *strsep(char **, const char *);
00146 extern size_t strspn(const char *__s, const char *__accept) __ATTR_PURE__;
00147 extern char *strstr(const char *, const char *) __ATTR_PURE__;
00148 extern char *strtok(char *, const char *);
00149 extern char *strtok_r(char *, const char *, char **);
00150 extern char *strupr(char *);
00151 
00152 #ifndef __DOXYGEN__
00153 /* libstdc++ compatibility, dummy declarations */
00154 extern int strcoll(const char *s1, const char *s2);
00155 extern char *strerror(int errnum);
00156 extern size_t strxfrm(char *dest, const char *src, size_t n);
00157 #endif  /* !__DOXYGEN__ */
00158 
00159 #ifdef __cplusplus
00160 }
00161 #endif
00162 
00163 #endif /* _STRING_H_ */
00164 
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