502 lines
17 KiB
C
502 lines
17 KiB
C
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/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/*
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* ISO C99 Standard: 7.21 String handling <string.h>
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*/
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#ifndef _STRING_H
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#define _STRING_H 1
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#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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#include <bits/libc-header-start.h>
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__BEGIN_DECLS
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/* Get size_t and NULL from <stddef.h>. */
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#define __need_size_t
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#define __need_NULL
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#include <stddef.h>
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/* Tell the caller that we provide correct C++ prototypes. */
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#if defined __cplusplus && (__GNUC_PREREQ (4, 4) \
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|| __glibc_clang_prereq (3, 5))
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# define __CORRECT_ISO_CPP_STRING_H_PROTO
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#endif
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/* Copy N bytes of SRC to DEST. */
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extern void *memcpy (void *__restrict __dest, const void *__restrict __src,
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size_t __n) __THROW __nonnull ((1, 2));
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/* Copy N bytes of SRC to DEST, guaranteeing
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correct behavior for overlapping strings. */
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extern void *memmove (void *__dest, const void *__src, size_t __n)
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__THROW __nonnull ((1, 2));
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/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
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Return the position in DEST one byte past where C was copied,
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or NULL if C was not found in the first N bytes of SRC. */
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#if defined __USE_MISC || defined __USE_XOPEN
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extern void *memccpy (void *__restrict __dest, const void *__restrict __src,
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int __c, size_t __n)
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__THROW __nonnull ((1, 2));
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#endif /* Misc || X/Open. */
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/* Set N bytes of S to C. */
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extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
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/* Compare N bytes of S1 and S2. */
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extern int memcmp (const void *__s1, const void *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Search N bytes of S for C. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern void *memchr (void *__s, int __c, size_t __n)
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__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
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extern const void *memchr (const void *__s, int __c, size_t __n)
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__THROW __asm ("memchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline void *
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memchr (void *__s, int __c, size_t __n) __THROW
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{
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return __builtin_memchr (__s, __c, __n);
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}
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__extern_always_inline const void *
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memchr (const void *__s, int __c, size_t __n) __THROW
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{
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return __builtin_memchr (__s, __c, __n);
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}
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# endif
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}
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#else
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extern void *memchr (const void *__s, int __c, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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#ifdef __USE_GNU
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/* Search in S for C. This is similar to `memchr' but there is no
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length limit. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" void *rawmemchr (void *__s, int __c)
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__THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
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extern "C++" const void *rawmemchr (const void *__s, int __c)
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__THROW __asm ("rawmemchr") __attribute_pure__ __nonnull ((1));
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# else
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extern void *rawmemchr (const void *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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/* Search N bytes of S for the final occurrence of C. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" void *memrchr (void *__s, int __c, size_t __n)
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__THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
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extern "C++" const void *memrchr (const void *__s, int __c, size_t __n)
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__THROW __asm ("memrchr") __attribute_pure__ __nonnull ((1));
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# else
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extern void *memrchr (const void *__s, int __c, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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#endif
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/* Copy SRC to DEST. */
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extern char *strcpy (char *__restrict __dest, const char *__restrict __src)
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__THROW __nonnull ((1, 2));
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/* Copy no more than N characters of SRC to DEST. */
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extern char *strncpy (char *__restrict __dest,
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const char *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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/* Append SRC onto DEST. */
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extern char *strcat (char *__restrict __dest, const char *__restrict __src)
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__THROW __nonnull ((1, 2));
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/* Append no more than N characters from SRC onto DEST. */
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extern char *strncat (char *__restrict __dest, const char *__restrict __src,
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size_t __n) __THROW __nonnull ((1, 2));
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/* Compare S1 and S2. */
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extern int strcmp (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Compare N characters of S1 and S2. */
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extern int strncmp (const char *__s1, const char *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Compare the collated forms of S1 and S2. */
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extern int strcoll (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Put a transformation of SRC into no more than N bytes of DEST. */
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extern size_t strxfrm (char *__restrict __dest,
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const char *__restrict __src, size_t __n)
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__THROW __nonnull ((2));
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#ifdef __USE_XOPEN2K8
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/* POSIX.1-2008 extended locale interface (see locale.h). */
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# include <bits/types/locale_t.h>
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/* Compare the collated forms of S1 and S2, using sorting rules from L. */
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extern int strcoll_l (const char *__s1, const char *__s2, locale_t __l)
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__THROW __attribute_pure__ __nonnull ((1, 2, 3));
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/* Put a transformation of SRC into no more than N bytes of DEST,
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using sorting rules from L. */
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extern size_t strxfrm_l (char *__dest, const char *__src, size_t __n,
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locale_t __l) __THROW __nonnull ((2, 4));
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#endif
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#if (defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 \
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|| __GLIBC_USE (LIB_EXT2))
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/* Duplicate S, returning an identical malloc'd string. */
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extern char *strdup (const char *__s)
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__THROW __attribute_malloc__ __nonnull ((1));
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#endif
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/* Return a malloc'd copy of at most N bytes of STRING. The
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resultant string is terminated even if no null terminator
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appears before STRING[N]. */
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#if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
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extern char *strndup (const char *__string, size_t __n)
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__THROW __attribute_malloc__ __nonnull ((1));
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#endif
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#if defined __USE_GNU && defined __GNUC__
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/* Duplicate S, returning an identical alloca'd string. */
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# define strdupa(s) \
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(__extension__ \
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({ \
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const char *__old = (s); \
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size_t __len = strlen (__old) + 1; \
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char *__new = (char *) __builtin_alloca (__len); \
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(char *) memcpy (__new, __old, __len); \
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}))
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/* Return an alloca'd copy of at most N bytes of string. */
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# define strndupa(s, n) \
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(__extension__ \
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({ \
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const char *__old = (s); \
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size_t __len = strnlen (__old, (n)); \
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char *__new = (char *) __builtin_alloca (__len + 1); \
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__new[__len] = '\0'; \
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(char *) memcpy (__new, __old, __len); \
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}))
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#endif
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/* Find the first occurrence of C in S. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strchr (char *__s, int __c)
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__THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
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extern const char *strchr (const char *__s, int __c)
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__THROW __asm ("strchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strchr (char *__s, int __c) __THROW
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{
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return __builtin_strchr (__s, __c);
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}
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__extern_always_inline const char *
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strchr (const char *__s, int __c) __THROW
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{
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return __builtin_strchr (__s, __c);
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}
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# endif
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}
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#else
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extern char *strchr (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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/* Find the last occurrence of C in S. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strrchr (char *__s, int __c)
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__THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
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extern const char *strrchr (const char *__s, int __c)
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__THROW __asm ("strrchr") __attribute_pure__ __nonnull ((1));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strrchr (char *__s, int __c) __THROW
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{
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return __builtin_strrchr (__s, __c);
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}
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__extern_always_inline const char *
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strrchr (const char *__s, int __c) __THROW
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{
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return __builtin_strrchr (__s, __c);
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}
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# endif
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}
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#else
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extern char *strrchr (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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#ifdef __USE_GNU
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/* This function is similar to `strchr'. But it returns a pointer to
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the closing NUL byte in case C is not found in S. */
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# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++" char *strchrnul (char *__s, int __c)
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__THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
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extern "C++" const char *strchrnul (const char *__s, int __c)
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__THROW __asm ("strchrnul") __attribute_pure__ __nonnull ((1));
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# else
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extern char *strchrnul (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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# endif
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#endif
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/* Return the length of the initial segment of S which
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consists entirely of characters not in REJECT. */
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extern size_t strcspn (const char *__s, const char *__reject)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Return the length of the initial segment of S which
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consists entirely of characters in ACCEPT. */
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extern size_t strspn (const char *__s, const char *__accept)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Find the first occurrence in S of any character in ACCEPT. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strpbrk (char *__s, const char *__accept)
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__THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
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extern const char *strpbrk (const char *__s, const char *__accept)
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__THROW __asm ("strpbrk") __attribute_pure__ __nonnull ((1, 2));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strpbrk (char *__s, const char *__accept) __THROW
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{
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return __builtin_strpbrk (__s, __accept);
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}
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__extern_always_inline const char *
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strpbrk (const char *__s, const char *__accept) __THROW
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{
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return __builtin_strpbrk (__s, __accept);
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}
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# endif
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}
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#else
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extern char *strpbrk (const char *__s, const char *__accept)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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#endif
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/* Find the first occurrence of NEEDLE in HAYSTACK. */
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#ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
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extern "C++"
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{
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extern char *strstr (char *__haystack, const char *__needle)
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__THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
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extern const char *strstr (const char *__haystack, const char *__needle)
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__THROW __asm ("strstr") __attribute_pure__ __nonnull ((1, 2));
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# ifdef __OPTIMIZE__
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__extern_always_inline char *
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strstr (char *__haystack, const char *__needle) __THROW
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{
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return __builtin_strstr (__haystack, __needle);
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}
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__extern_always_inline const char *
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strstr (const char *__haystack, const char *__needle) __THROW
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{
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return __builtin_strstr (__haystack, __needle);
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}
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# endif
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}
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#else
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extern char *strstr (const char *__haystack, const char *__needle)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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#endif
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/* Divide S into tokens separated by characters in DELIM. */
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extern char *strtok (char *__restrict __s, const char *__restrict __delim)
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__THROW __nonnull ((2));
|
||
|
|
|
||
|
|
/* Divide S into tokens separated by characters in DELIM. Information
|
||
|
|
passed between calls are stored in SAVE_PTR. */
|
||
|
|
extern char *__strtok_r (char *__restrict __s,
|
||
|
|
const char *__restrict __delim,
|
||
|
|
char **__restrict __save_ptr)
|
||
|
|
__THROW __nonnull ((2, 3));
|
||
|
|
#ifdef __USE_POSIX
|
||
|
|
extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
|
||
|
|
char **__restrict __save_ptr)
|
||
|
|
__THROW __nonnull ((2, 3));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
/* Similar to `strstr' but this function ignores the case of both strings. */
|
||
|
|
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
|
||
|
|
extern "C++" char *strcasestr (char *__haystack, const char *__needle)
|
||
|
|
__THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
|
||
|
|
extern "C++" const char *strcasestr (const char *__haystack,
|
||
|
|
const char *__needle)
|
||
|
|
__THROW __asm ("strcasestr") __attribute_pure__ __nonnull ((1, 2));
|
||
|
|
# else
|
||
|
|
extern char *strcasestr (const char *__haystack, const char *__needle)
|
||
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
/* Find the first occurrence of NEEDLE in HAYSTACK.
|
||
|
|
NEEDLE is NEEDLELEN bytes long;
|
||
|
|
HAYSTACK is HAYSTACKLEN bytes long. */
|
||
|
|
extern void *memmem (const void *__haystack, size_t __haystacklen,
|
||
|
|
const void *__needle, size_t __needlelen)
|
||
|
|
__THROW __attribute_pure__ __nonnull ((1, 3));
|
||
|
|
|
||
|
|
/* Copy N bytes of SRC to DEST, return pointer to bytes after the
|
||
|
|
last written byte. */
|
||
|
|
extern void *__mempcpy (void *__restrict __dest,
|
||
|
|
const void *__restrict __src, size_t __n)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
extern void *mempcpy (void *__restrict __dest,
|
||
|
|
const void *__restrict __src, size_t __n)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Return the length of S. */
|
||
|
|
extern size_t strlen (const char *__s)
|
||
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
||
|
|
|
||
|
|
#ifdef __USE_XOPEN2K8
|
||
|
|
/* Find the length of STRING, but scan at most MAXLEN characters.
|
||
|
|
If no '\0' terminator is found in that many characters, return MAXLEN. */
|
||
|
|
extern size_t strnlen (const char *__string, size_t __maxlen)
|
||
|
|
__THROW __attribute_pure__ __nonnull ((1));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Return a string describing the meaning of the `errno' code in ERRNUM. */
|
||
|
|
extern char *strerror (int __errnum) __THROW;
|
||
|
|
#ifdef __USE_XOPEN2K
|
||
|
|
/* Reentrant version of `strerror'.
|
||
|
|
There are 2 flavors of `strerror_r', GNU which returns the string
|
||
|
|
and may or may not use the supplied temporary buffer and POSIX one
|
||
|
|
which fills the string into the buffer.
|
||
|
|
To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
|
||
|
|
without -D_GNU_SOURCE is needed, otherwise the GNU version is
|
||
|
|
preferred. */
|
||
|
|
# if defined __USE_XOPEN2K && !defined __USE_GNU
|
||
|
|
/* Fill BUF with a string describing the meaning of the `errno' code in
|
||
|
|
ERRNUM. */
|
||
|
|
# ifdef __REDIRECT_NTH
|
||
|
|
extern int __REDIRECT_NTH (strerror_r,
|
||
|
|
(int __errnum, char *__buf, size_t __buflen),
|
||
|
|
__xpg_strerror_r) __nonnull ((2));
|
||
|
|
# else
|
||
|
|
extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
|
||
|
|
__THROW __nonnull ((2));
|
||
|
|
# define strerror_r __xpg_strerror_r
|
||
|
|
# endif
|
||
|
|
# else
|
||
|
|
/* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
|
||
|
|
used. */
|
||
|
|
extern char *strerror_r (int __errnum, char *__buf, size_t __buflen)
|
||
|
|
__THROW __nonnull ((2)) __wur;
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_XOPEN2K8
|
||
|
|
/* Translate error number to string according to the locale L. */
|
||
|
|
extern char *strerror_l (int __errnum, locale_t __l) __THROW;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_MISC
|
||
|
|
# include <strings.h>
|
||
|
|
|
||
|
|
/* Set N bytes of S to 0. The compiler will not delete a call to this
|
||
|
|
function, even if S is dead after the call. */
|
||
|
|
extern void explicit_bzero (void *__s, size_t __n) __THROW __nonnull ((1));
|
||
|
|
|
||
|
|
/* Return the next DELIM-delimited token from *STRINGP,
|
||
|
|
terminating it with a '\0', and update *STRINGP to point past it. */
|
||
|
|
extern char *strsep (char **__restrict __stringp,
|
||
|
|
const char *__restrict __delim)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_XOPEN2K8
|
||
|
|
/* Return a string describing the meaning of the signal number in SIG. */
|
||
|
|
extern char *strsignal (int __sig) __THROW;
|
||
|
|
|
||
|
|
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
|
||
|
|
extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
extern char *stpcpy (char *__restrict __dest, const char *__restrict __src)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
|
||
|
|
/* Copy no more than N characters of SRC to DEST, returning the address of
|
||
|
|
the last character written into DEST. */
|
||
|
|
extern char *__stpncpy (char *__restrict __dest,
|
||
|
|
const char *__restrict __src, size_t __n)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
extern char *stpncpy (char *__restrict __dest,
|
||
|
|
const char *__restrict __src, size_t __n)
|
||
|
|
__THROW __nonnull ((1, 2));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __USE_GNU
|
||
|
|
/* Compare S1 and S2 as strings holding name & indices/version numbers. */
|
||
|
|
extern int strverscmp (const char *__s1, const char *__s2)
|
||
|
|
__THROW __attribute_pure__ __nonnull ((1, 2));
|
||
|
|
|
||
|
|
/* Sautee STRING briskly. */
|
||
|
|
extern char *strfry (char *__string) __THROW __nonnull ((1));
|
||
|
|
|
||
|
|
/* Frobnicate N bytes of S. */
|
||
|
|
extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));
|
||
|
|
|
||
|
|
# ifndef basename
|
||
|
|
/* Return the file name within directory of FILENAME. We don't
|
||
|
|
declare the function if the `basename' macro is available (defined
|
||
|
|
in <libgen.h>) which makes the XPG version of this function
|
||
|
|
available. */
|
||
|
|
# ifdef __CORRECT_ISO_CPP_STRING_H_PROTO
|
||
|
|
extern "C++" char *basename (char *__filename)
|
||
|
|
__THROW __asm ("basename") __nonnull ((1));
|
||
|
|
extern "C++" const char *basename (const char *__filename)
|
||
|
|
__THROW __asm ("basename") __nonnull ((1));
|
||
|
|
# else
|
||
|
|
extern char *basename (const char *__filename) __THROW __nonnull ((1));
|
||
|
|
# endif
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if __GNUC_PREREQ (3,4)
|
||
|
|
# if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
|
||
|
|
/* Functions with security checks. */
|
||
|
|
# include <bits/string_fortified.h>
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif /* string.h */
|