327 lines
11 KiB
C
327 lines
11 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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#include <xlocale.h>
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__BEGIN_DECLS
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extern void* memccpy(void* __restrict, const void* __restrict, 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* __restrict, const void* __restrict, 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 char* strchr(const char *, int) __purefunc;
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extern char* __strchr_chk(const char *, int, size_t);
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extern char* strrchr(const char *, int) __purefunc;
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extern char* __strrchr_chk(const char *, int, size_t);
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extern size_t strlen(const char *) __purefunc;
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extern size_t __strlen_chk(const char *, size_t);
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extern int strcmp(const char *, const char *) __purefunc;
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extern char* stpcpy(char* __restrict, const char* __restrict);
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extern char* strcpy(char* __restrict, const char* __restrict);
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extern char* strcat(char* __restrict, const char* __restrict);
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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* __restrict, const char* __restrict);
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extern char* strtok_r(char* __restrict, const char* __restrict, char** __restrict);
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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* __restrict, const char* __restrict, 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* stpncpy(char* __restrict, const char* __restrict, size_t);
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extern char* strncpy(char* __restrict, const char* __restrict, size_t);
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extern size_t strlcat(char* __restrict, const char* __restrict, size_t);
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extern size_t strlcpy(char* __restrict, const char* __restrict, 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** __restrict, const char* __restrict);
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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* __restrict, const char* __restrict, size_t);
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extern int strcoll_l(const char *, const char *, locale_t) __purefunc;
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extern size_t strxfrm_l(char* __restrict, const char* __restrict, size_t, locale_t);
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#if defined(__BIONIC_FORTIFY)
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__errordecl(__memcpy_dest_size_error, "memcpy: prevented write past end of buffer");
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__errordecl(__memcpy_src_size_error, "memcpy: prevented read past end of buffer");
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__BIONIC_FORTIFY_INLINE
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void* memcpy(void* __restrict dest, const void* __restrict src, size_t copy_amount) {
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char *d = (char *) dest;
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const char *s = (const char *) src;
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size_t s_len = __bos0(s);
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size_t d_len = __bos0(d);
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if (__builtin_constant_p(copy_amount) && (copy_amount > d_len)) {
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__memcpy_dest_size_error();
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}
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if (__builtin_constant_p(copy_amount) && (copy_amount > s_len)) {
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__memcpy_src_size_error();
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}
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return __builtin___memcpy_chk(dest, src, copy_amount, d_len);
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}
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__BIONIC_FORTIFY_INLINE
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void* memmove(void *dest, const void *src, size_t len) {
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return __builtin___memmove_chk(dest, src, len, __bos0(dest));
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}
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__BIONIC_FORTIFY_INLINE
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char* stpcpy(char* __restrict dest, const char* __restrict src) {
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return __builtin___stpcpy_chk(dest, src, __bos(dest));
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}
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__BIONIC_FORTIFY_INLINE
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char* strcpy(char* __restrict dest, const char* __restrict src) {
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return __builtin___strcpy_chk(dest, src, __bos(dest));
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}
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__errordecl(__stpncpy_error, "stpncpy: prevented write past end of buffer");
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extern char* __stpncpy_chk2(char* __restrict, const char* __restrict, size_t, size_t, size_t);
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__BIONIC_FORTIFY_INLINE
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char* stpncpy(char* __restrict dest, const char* __restrict src, size_t n) {
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size_t bos_dest = __bos(dest);
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size_t bos_src = __bos(src);
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if (__builtin_constant_p(n) && (n > bos_dest)) {
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__stpncpy_error();
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}
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if (bos_src == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin___stpncpy_chk(dest, src, n, bos_dest);
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}
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if (__builtin_constant_p(n) && (n <= bos_src)) {
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return __builtin___stpncpy_chk(dest, src, n, bos_dest);
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}
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size_t slen = __builtin_strlen(src);
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if (__builtin_constant_p(slen)) {
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return __builtin___stpncpy_chk(dest, src, n, bos_dest);
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}
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return __stpncpy_chk2(dest, src, n, bos_dest, bos_src);
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}
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__errordecl(__strncpy_error, "strncpy: prevented write past end of buffer");
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extern char* __strncpy_chk2(char* __restrict, const char* __restrict, size_t, size_t, size_t);
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__BIONIC_FORTIFY_INLINE
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char* strncpy(char* __restrict dest, const char* __restrict src, size_t n) {
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size_t bos_dest = __bos(dest);
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size_t bos_src = __bos(src);
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if (__builtin_constant_p(n) && (n > bos_dest)) {
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__strncpy_error();
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}
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if (bos_src == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin___strncpy_chk(dest, src, n, bos_dest);
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}
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if (__builtin_constant_p(n) && (n <= bos_src)) {
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return __builtin___strncpy_chk(dest, src, n, bos_dest);
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}
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size_t slen = __builtin_strlen(src);
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if (__builtin_constant_p(slen)) {
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return __builtin___strncpy_chk(dest, src, n, bos_dest);
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}
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return __strncpy_chk2(dest, src, n, bos_dest, bos_src);
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}
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__BIONIC_FORTIFY_INLINE
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char* strcat(char* __restrict dest, const char* __restrict src) {
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return __builtin___strcat_chk(dest, src, __bos(dest));
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}
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__BIONIC_FORTIFY_INLINE
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char *strncat(char* __restrict dest, const char* __restrict src, size_t n) {
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return __builtin___strncat_chk(dest, src, n, __bos(dest));
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}
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__BIONIC_FORTIFY_INLINE
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void* memset(void *s, int c, size_t n) {
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return __builtin___memset_chk(s, c, n, __bos0(s));
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}
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extern size_t __strlcpy_real(char* __restrict, const char* __restrict, size_t)
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__asm__(__USER_LABEL_PREFIX__ "strlcpy");
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__errordecl(__strlcpy_error, "strlcpy: prevented write past end of buffer");
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extern size_t __strlcpy_chk(char *, const char *, size_t, size_t);
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__BIONIC_FORTIFY_INLINE
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size_t strlcpy(char* __restrict dest, const char* __restrict src, size_t size) {
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size_t bos = __bos(dest);
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#if !defined(__clang__)
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// Compiler doesn't know destination size. Don't call __strlcpy_chk
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __strlcpy_real(dest, src, size);
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}
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// Compiler can prove, at compile time, that the passed in size
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// is always <= the actual object size. Don't call __strlcpy_chk
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if (__builtin_constant_p(size) && (size <= bos)) {
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return __strlcpy_real(dest, src, size);
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}
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// Compiler can prove, at compile time, that the passed in size
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// is always > the actual object size. Force a compiler error.
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if (__builtin_constant_p(size) && (size > bos)) {
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__strlcpy_error();
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}
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#endif /* !defined(__clang__) */
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return __strlcpy_chk(dest, src, size, bos);
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}
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extern size_t __strlcat_real(char* __restrict, const char* __restrict, size_t)
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__asm__(__USER_LABEL_PREFIX__ "strlcat");
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__errordecl(__strlcat_error, "strlcat: prevented write past end of buffer");
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extern size_t __strlcat_chk(char* __restrict, const char* __restrict, size_t, size_t);
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__BIONIC_FORTIFY_INLINE
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size_t strlcat(char* __restrict dest, const char* __restrict src, size_t size) {
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size_t bos = __bos(dest);
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#if !defined(__clang__)
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// Compiler doesn't know destination size. Don't call __strlcat_chk
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __strlcat_real(dest, src, size);
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}
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// Compiler can prove, at compile time, that the passed in size
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// is always <= the actual object size. Don't call __strlcat_chk
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if (__builtin_constant_p(size) && (size <= bos)) {
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return __strlcat_real(dest, src, size);
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}
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// Compiler can prove, at compile time, that the passed in size
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// is always > the actual object size. Force a compiler error.
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if (__builtin_constant_p(size) && (size > bos)) {
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__strlcat_error();
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}
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#endif /* !defined(__clang__) */
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return __strlcat_chk(dest, src, size, bos);
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}
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__BIONIC_FORTIFY_INLINE
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size_t strlen(const char *s) {
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size_t bos = __bos(s);
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#if !defined(__clang__)
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// Compiler doesn't know destination size. Don't call __strlen_chk
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin_strlen(s);
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}
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size_t slen = __builtin_strlen(s);
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if (__builtin_constant_p(slen)) {
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return slen;
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}
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#endif /* !defined(__clang__) */
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return __strlen_chk(s, bos);
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}
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__BIONIC_FORTIFY_INLINE
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char* strchr(const char *s, int c) {
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size_t bos = __bos(s);
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#if !defined(__clang__)
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// Compiler doesn't know destination size. Don't call __strchr_chk
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin_strchr(s, c);
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}
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size_t slen = __builtin_strlen(s);
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if (__builtin_constant_p(slen) && (slen < bos)) {
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return __builtin_strchr(s, c);
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}
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#endif /* !defined(__clang__) */
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return __strchr_chk(s, c, bos);
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}
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__BIONIC_FORTIFY_INLINE
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char* strrchr(const char *s, int c) {
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size_t bos = __bos(s);
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#if !defined(__clang__)
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// Compiler doesn't know destination size. Don't call __strrchr_chk
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if (bos == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
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return __builtin_strrchr(s, c);
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}
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size_t slen = __builtin_strlen(s);
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if (__builtin_constant_p(slen) && (slen < bos)) {
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return __builtin_strrchr(s, c);
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}
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#endif /* !defined(__clang__) */
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return __strrchr_chk(s, c, bos);
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}
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#endif /* defined(__BIONIC_FORTIFY) */
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__END_DECLS
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#endif /* _STRING_H_ */
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