mirror of
https://github.com/SerenityOS/serenity.git
synced 2026-11-07 04:29:30 -10:00
Lucas Chollet
5a4c0d7bd3
The C++ standard defines strchr, strrchr, strpbrk, strstr and memchr
differently than POSIX. To be conformant, we need to provide a different
signature when __cplusplus is defined.
This is the same logic as 73d178af, but applied to string.h.
93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <[email protected]>
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* Copyright (c) 2021-2022, Brian Gianforcaro <[email protected]>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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// Includes essentially mandated by POSIX:
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// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/string.h.html
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#include <stddef.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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__BEGIN_DECLS
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// Let libcxx and libstdc++ know that we provide the C++ version of strchr and friends.
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// Note that libcxx is not consistent between string.h and wchar.h, and it does not
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// require us to define _LIBCPP_STRING_H_HAS_CONST_OVERLOADS here.
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#ifdef __cplusplus
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# define __CORRECT_ISO_CPP_STRING_H_PROTO
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#endif
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// A few C Standard Libraries include this header in <string.h>, and hence expect
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// `strcasecmp` etcetera to be available as part of a <string.h> include, so let's
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// do the same here to maintain compatibility
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#include <strings.h>
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#if defined(__cplusplus) && !defined(__STRING_FORCE_C_DECLARATION)
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# define __MAKE_C_OR_CPP_DECLARATION(type, name, ...) \
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extern "C++" type const* name(type const*, __VA_ARGS__) asm(#name); \
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extern "C++" type* name(type*, __VA_ARGS__) asm(#name)
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#else
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# define __MAKE_C_OR_CPP_DECLARATION(type, name, ...) \
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type* name(type const*, __VA_ARGS__)
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#endif
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size_t strlen(char const*);
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size_t strnlen(char const*, size_t maxlen);
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int strcmp(char const*, char const*);
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int strncmp(char const*, char const*, size_t);
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int memcmp(void const*, void const*, size_t);
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int timingsafe_memcmp(void const*, void const*, size_t);
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void* memcpy(void*, void const*, size_t);
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void* memccpy(void*, void const*, int, size_t);
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void* memmove(void*, void const*, size_t);
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__MAKE_C_OR_CPP_DECLARATION(void, memchr, int c, size_t n);
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void* memmem(void const* haystack, size_t, void const* needle, size_t);
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void* memset(void*, int, size_t);
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void explicit_bzero(void*, size_t) __attribute__((nonnull(1)));
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__attribute__((malloc)) char* strdup(char const*);
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__attribute__((malloc)) char* strndup(char const*, size_t);
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char* strcpy(char* dest, char const* src);
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char* stpcpy(char* dest, char const* src);
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char* strncpy(char* dest, char const* src, size_t);
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char* stpncpy(char* dest, char const* src, size_t);
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__attribute__((warn_unused_result)) size_t strlcpy(char* dest, char const* src, size_t);
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__MAKE_C_OR_CPP_DECLARATION(char, strchr, int c);
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char* strchrnul(char const*, int c);
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__MAKE_C_OR_CPP_DECLARATION(char, strstr, char const* needle);
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char* strcasestr(char const* haystack, char const* needle);
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__MAKE_C_OR_CPP_DECLARATION(char, strrchr, int c);
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char* index(char const* str, int ch);
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char* rindex(char const* str, int ch);
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char* strcat(char* dest, char const* src);
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char* strncat(char* dest, char const* src, size_t);
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size_t strspn(char const*, char const* accept);
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size_t strcspn(char const*, char const* reject);
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int strerror_r(int, char*, size_t);
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char* strerror(int errnum);
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char* strsignal(int signum);
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__MAKE_C_OR_CPP_DECLARATION(char, strpbrk, char const* accept);
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char* strtok_r(char* str, char const* delim, char** saved_str);
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char* strtok(char* str, char const* delim);
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int strcoll(char const* s1, char const* s2);
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size_t strxfrm(char* dest, char const* src, size_t n);
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char* strsep(char** str, char const* delim);
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__END_DECLS
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#undef __MAKE_C_OR_CPP_DECLARATION
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