a677907ee8
cdefs.h: Introduce the __purefunc attribute, which allows us to mark certain functions as being "pure". http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html Many functions have no effects except the return value and their return value depends only on the parameters and/or global variables. Such a function can be subject to common subexpression elimination and loop optimization just as an arithmetic operator would be. string.h: Mark many commently used string functions as "pure", to allow for additional compiler optimizations. Change-Id: I42961f90f822b6dbcbc3fd72cdbe774a7adc8785
91 lines
3.7 KiB
C
91 lines
3.7 KiB
C
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _STRING_H_
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#define _STRING_H_
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#include <sys/cdefs.h>
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#include <stddef.h>
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#include <malloc.h>
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__BEGIN_DECLS
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extern void* memccpy(void *, const void *, int, size_t);
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extern void* memchr(const void *, int, size_t) __purefunc;
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extern void* memrchr(const void *, int, size_t) __purefunc;
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extern int memcmp(const void *, const void *, size_t) __purefunc;
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extern void* memcpy(void *, const void *, size_t);
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extern void* memmove(void *, const void *, size_t);
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extern void* memset(void *, int, size_t);
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extern void* memmem(const void *, size_t, const void *, size_t) __purefunc;
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extern void memswap(void *, void *, size_t);
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extern char* index(const char *, int) __purefunc;
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extern char* rindex(const char *, int) __purefunc;
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extern char* strchr(const char *, int) __purefunc;
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extern char* strrchr(const char *, int) __purefunc;
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extern size_t strlen(const char *) __purefunc;
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extern int strcmp(const char *, const char *) __purefunc;
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extern char* strcpy(char *, const char *);
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extern char* strcat(char *, const char *);
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extern int strcasecmp(const char *, const char *) __purefunc;
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extern int strncasecmp(const char *, const char *, size_t) __purefunc;
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extern char* strdup(const char *);
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extern char* strstr(const char *, const char *) __purefunc;
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extern char* strcasestr(const char *haystack, const char *needle) __purefunc;
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extern char* strtok(char *, const char *);
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extern char* strtok_r(char *, const char *, char**);
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extern char* strerror(int);
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extern int strerror_r(int errnum, char *buf, size_t n);
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extern size_t strnlen(const char *, size_t) __purefunc;
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extern char* strncat(char *, const char *, size_t);
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extern char* strndup(const char *, size_t);
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extern int strncmp(const char *, const char *, size_t) __purefunc;
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extern char* strncpy(char *, const char *, size_t);
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extern size_t strlcat(char *, const char *, size_t);
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extern size_t strlcpy(char *, const char *, size_t);
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extern size_t strcspn(const char *, const char *) __purefunc;
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extern char* strpbrk(const char *, const char *) __purefunc;
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extern char* strsep(char **, const char *);
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extern size_t strspn(const char *, const char *);
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extern char* strsignal(int sig);
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extern int strcoll(const char *, const char *) __purefunc;
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extern size_t strxfrm(char *, const char *, size_t);
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__END_DECLS
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#endif /* _STRING_H_ */
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