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7c96537a58
This allows the compiler to automatically identify which string functions can be compiled into libraries, and the compiler's internal implementation is faster than libc functions. Signed-off-by: anjiahao <anjiahao@xiaomi.com>
453 lines
13 KiB
C
453 lines
13 KiB
C
/****************************************************************************
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* include/string.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_STRING_H
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#define __INCLUDE_STRING_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <stddef.h>
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#include <alloca.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define strcoll_l(s1, s2, l) strcoll(s1, s2)
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#define strdupa(x) strcpy(alloca(strlen(x) + 1), x)
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#define strerror_l(e, l) strerror(e)
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#define strxfrm_l(s1, s2, n, l) strxfrm(s1, s2, n)
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#define strndupa(x, l) ({ \
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FAR const char *__old = (x); \
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size_t __len = strnlen(__old, (l)); \
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FAR char *__new = alloca(__len + 1); \
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__new[__len] = '\0'; \
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(FAR char *)memcpy(__new, __old, __len); \
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})
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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FAR char *strdup(FAR const char *s) malloc_like;
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FAR char *strndup(FAR const char *s, size_t size) malloc_like;
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FAR char *strerror(int);
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int strerror_r(int, FAR char *, size_t);
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size_t strlen(FAR const char *);
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size_t strnlen(FAR const char *, size_t);
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FAR char *strcat(FAR char *, FAR const char *);
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size_t strlcat(FAR char *, FAR const char *, size_t);
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FAR char *strncat(FAR char *, FAR const char *, size_t);
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int strcmp(FAR const char *, FAR const char *);
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int strncmp(FAR const char *, FAR const char *, size_t);
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int strcoll(FAR const char *, FAR const char *s2);
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FAR char *strcpy(FAR char *dest, FAR const char *src);
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FAR char *stpcpy(FAR char *dest, FAR const char *src);
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size_t strlcpy(FAR char *dst, FAR const char *src, size_t size);
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FAR char *strncpy(FAR char *, FAR const char *, size_t);
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FAR char *stpncpy(FAR char *, FAR const char *, size_t);
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FAR char *strpbrk(FAR const char *, FAR const char *);
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FAR char *strchr(FAR const char *s, int c);
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FAR char *strchrnul(FAR const char *s, int c);
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FAR char *strrchr(FAR const char *s, int c);
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size_t strspn(FAR const char *, FAR const char *);
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size_t strcspn(FAR const char *, FAR const char *);
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FAR char *strstr(FAR const char *, FAR const char *);
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FAR char *strcasestr(FAR const char *, FAR const char *);
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FAR char *strsep(FAR char **, FAR const char *);
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FAR char *strsignal(int signum);
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FAR char *strtok(FAR char *, FAR const char *);
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FAR char *strtok_r(FAR char *, FAR const char *, FAR char **);
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size_t strxfrm(FAR char *, FAR const char *, size_t n);
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int strverscmp(FAR const char *s1, FAR const char *s2);
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FAR void *memchr(FAR const void *s, int c, size_t n);
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FAR void *memrchr(FAR const void *s, int c, size_t n);
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FAR void *rawmemchr(FAR const void *s, int c);
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FAR void *memccpy(FAR void *s1, FAR const void *s2, int c, size_t n);
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int memcmp(FAR const void *s1, FAR const void *s2, size_t n);
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FAR void *memcpy(FAR void *dest, FAR const void *src, size_t n);
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FAR void *mempcpy(FAR void *dest, FAR const void *src, size_t n);
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FAR void *memmove(FAR void *dest, FAR const void *src, size_t count);
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FAR void *memset(FAR void *s, int c, size_t n);
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FAR void *memmem(FAR const void *haystack, size_t haystacklen,
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FAR const void *needle, size_t needlelen);
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void explicit_bzero(FAR void *s, size_t n);
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int timingsafe_bcmp(FAR const void *b1, FAR const void *b2, size_t n);
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#ifdef __KERNEL__
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# define strdup(s) nx_strdup(s)
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# define strndup(s,sz) nx_strndup(s,sz)
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#endif
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FAR char *nx_strdup(FAR const char *s) malloc_like;
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FAR char *nx_strndup(FAR const char *s, size_t size) malloc_like;
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#if CONFIG_FORTIFY_SOURCE > 0
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fortify_function(strcat) FAR char *strcat(FAR char *dest,
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FAR const char *src)
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{
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fortify_assert(strlen(dest) + strlen(src) + 1 <= fortify_size(dest, 0));
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return __real_strcat(dest, src);
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}
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fortify_function(strlcat) size_t strlcat(FAR char *dst,
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FAR const char *src,
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size_t dsize)
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{
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fortify_assert(dsize <= fortify_size(dst, 0));
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return __real_strlcat(dst, src, dsize);
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}
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fortify_function(strncat) FAR char *strncat(FAR char *dest,
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FAR const char *src,
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size_t n)
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{
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fortify_assert(n <= fortify_size(dest, 0));
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return __real_strncat(dest, src, n);
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}
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fortify_function(strcpy) FAR char *strcpy(FAR char *dest,
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FAR const char *src)
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{
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fortify_assert(strlen(src) + 1 <= fortify_size(dest, 0));
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return __real_strcpy(dest, src);
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}
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fortify_function(stpcpy) FAR char *stpcpy(FAR char *dest,
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FAR const char *src)
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{
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fortify_assert(strlen(src) + 1 <= fortify_size(dest, 0));
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return __real_stpcpy(dest, src);
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}
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fortify_function(stpncpy) FAR char *stpncpy(FAR char *dest,
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FAR const char *src,
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size_t n)
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{
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fortify_assert(n <= fortify_size(dest, 0));
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return __real_stpncpy(dest, src, n);
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}
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fortify_function(strlcpy) size_t strlcpy(FAR char *dst,
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FAR const char *src,
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size_t size)
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{
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fortify_assert(size <= fortify_size(dst, 0));
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return __real_strlcpy(dst, src, size);
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}
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fortify_function(strncpy) FAR char *strncpy(FAR char *dest,
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FAR const char *src,
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size_t n)
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{
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fortify_assert(n <= fortify_size(dest, 0));
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return __real_strncpy(dest, src, n);
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}
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fortify_function(memmove) FAR void *memmove(FAR void *dest,
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FAR const void *src,
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size_t count)
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{
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fortify_assert(count <= fortify_size(dest, 0) &&
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count <= fortify_size(src, 0));
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return __real_memmove(dest, src, count);
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}
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fortify_function(memcpy) FAR void *memcpy(FAR void *dest,
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FAR const void *src,
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size_t n)
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{
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fortify_assert(n <= fortify_size(dest, 0) && n <= fortify_size(src, 0));
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return __real_memcpy(dest, src, n);
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}
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fortify_function(memset) FAR void *memset(FAR void *s, int c, size_t n)
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{
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fortify_assert(n <= fortify_size(s, 0));
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return __real_memset(s, c, n);
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}
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fortify_function(mempcpy) FAR void *mempcpy(FAR void *dest,
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FAR const void *src,
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size_t n)
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{
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fortify_assert(n <= fortify_size(dest, 0) && n <= fortify_size(src, 0));
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return __real_mempcpy(dest, src, n);
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}
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fortify_function(explicit_bzero) void explicit_bzero(FAR void *s,
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size_t n)
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{
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fortify_assert(n <= fortify_size(s, 0));
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__real_explicit_bzero(s, n);
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}
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#endif
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#ifdef CONFIG_HAVE_BUILTIN
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# if __has_builtin(__builtin_memcpy)
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builtin_function(memcpy) FAR void *memcpy(FAR void *dest,
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FAR const void *src, size_t n)
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{
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if (__builtin_constant_p(n))
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{
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return __builtin_memcpy(dest, src, n);
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}
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else
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{
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return __orig_memcpy(dest, src, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_memset)
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builtin_function(memset) FAR void *memset(FAR void *s, int c, size_t n)
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{
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if (__builtin_constant_p(n))
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{
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return __builtin_memset(s, c, n);
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}
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else
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{
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return __orig_memset(s, c, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_memcmp)
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builtin_function(memcmp) int memcmp(FAR const void *s1,
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FAR const void *s2, size_t n)
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{
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if (__builtin_constant_p(s1) && __builtin_constant_p(s2))
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{
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return __builtin_memcmp(s1, s2, n);
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}
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else
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{
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return __orig_memcmp(s1, s2, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_memchr)
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builtin_function(memchr) FAR void *memchr(FAR const void *s,
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int c, size_t n)
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{
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if (__builtin_constant_p(s))
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{
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return __builtin_memchr(s, c, n);
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}
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else
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{
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return __orig_memchr(s, c, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_strcat)
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builtin_function(strcat) FAR char *strcat(FAR char *dest,
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FAR const char *src)
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{
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if (__builtin_constant_p(src))
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{
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return __builtin_strcat(dest, src);
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}
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else
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{
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return __orig_strcat(dest, src);
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}
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}
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# endif
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# if __has_builtin(__builtin_strchr)
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builtin_function(strchr) FAR char *strchr(FAR const char *s, int c)
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{
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if (__builtin_constant_p(s))
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{
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return __builtin_strchr(s, c);
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}
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else
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{
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return __orig_strchr(s, c);
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}
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}
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# endif
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# if __has_builtin(__builtin_strcmp)
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builtin_function(strcmp) int strcmp(FAR const char *s1,
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FAR const char *s2)
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{
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if (__builtin_constant_p(s1) && __builtin_constant_p(s2))
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{
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return __builtin_strcmp(s1, s2);
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}
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else
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{
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return __orig_strcmp(s1, s2);
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}
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}
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# endif
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# if __has_builtin(__builtin_strcpy)
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builtin_function(strcpy) FAR char *strcpy(FAR char *dest,
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FAR const char *src)
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{
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if (__builtin_constant_p(src))
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{
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return __builtin_strcpy(dest, src);
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}
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else
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{
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return __orig_strcpy(dest, src);
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}
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}
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# endif
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# if __has_builtin(__builtin_strcspn)
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builtin_function(strcspn) size_t strcspn(FAR const char *s,
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FAR const char *reject)
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{
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if (__builtin_constant_p(s) && __builtin_constant_p(reject))
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{
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return __builtin_strcspn(s, reject);
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}
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else
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{
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return __orig_strcspn(s, reject);
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}
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}
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# endif
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# if __has_builtin(__builtin_strlen)
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builtin_function(strlen) size_t strlen(FAR const char *s)
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{
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if (__builtin_constant_p(s))
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{
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return __builtin_strlen(s);
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}
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else
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{
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return __orig_strlen(s);
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}
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}
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# endif
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# if __has_builtin(__builtin_strncat)
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builtin_function(strncat) FAR char *strncat(FAR char *dest,
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FAR const char *src,
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size_t n)
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{
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if (__builtin_constant_p(dest))
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{
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return __builtin_strncat(dest, src, n);
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}
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else
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{
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return __orig_strncat(dest, src, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_strncmp)
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builtin_function(strncmp) int strncmp(FAR const char *s1,
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FAR const char *s2, size_t n)
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{
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if (__builtin_constant_p(s1) && __builtin_constant_p(s2))
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{
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return __builtin_strncmp(s1, s2, n);
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}
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else
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{
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return __orig_strncmp(s1, s2, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_strncpy)
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builtin_function(strncpy) FAR char *strncpy(FAR char *dest,
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FAR const char *src,
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size_t n)
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{
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if (__builtin_constant_p(src))
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{
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return __builtin_strncpy(dest, src, n);
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}
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else
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{
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return __orig_strncpy(dest, src, n);
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}
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}
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# endif
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# if __has_builtin(__builtin_strpbrk)
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builtin_function(strpbrk) FAR char *strpbrk(FAR const char *s1,
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FAR const char *s2)
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{
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if (__builtin_constant_p(s1))
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{
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return __builtin_strpbrk(s1, s2);
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}
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else
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{
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return __orig_strpbrk(s1, s2);
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}
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}
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# endif
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# if __has_builtin(__builtin_strrchr)
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builtin_function(strrchr) FAR char *strrchr(FAR const char *s,
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int c)
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{
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if (__builtin_constant_p(s))
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{
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return __builtin_strrchr(s, c);
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}
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else
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{
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return __orig_strrchr(s, c);
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}
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}
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# endif
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_STRING_H */
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