mirror of
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432 lines
16 KiB
C
432 lines
16 KiB
C
/* Copyright (C) 1991-1993,1995-2004,2007,2009 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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#include <features.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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__BEGIN_NAMESPACE_STD
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/* Copy N bytes of SRC to DEST. */
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extern void *memcpy (void *__restrict __dest,
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const void *__restrict __src, size_t __n)
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__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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__END_NAMESPACE_STD
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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_SVID || defined __USE_BSD || 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 /* SVID. */
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__BEGIN_NAMESPACE_STD
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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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extern void *memchr (const void *__s, int __c, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1));
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__END_NAMESPACE_STD
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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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extern void *rawmemchr (const void *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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/* Search N bytes of S for the final occurrence of C. */
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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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__BEGIN_NAMESPACE_STD
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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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__END_NAMESPACE_STD
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#if defined __USE_XOPEN2K8 && defined __UCLIBC_HAS_XLOCALE__
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/* The following functions are equivalent to the both above but they
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take the locale they use for the collation as an extra argument.
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This is not standardsized but something like will come. */
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# include <xlocale.h>
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/* Compare the collated forms of S1 and S2 using 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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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_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
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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
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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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__BEGIN_NAMESPACE_STD
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/* Find the first occurrence of C in S. */
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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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/* Find the last occurrence of C in S. */
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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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__END_NAMESPACE_STD
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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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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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__BEGIN_NAMESPACE_STD
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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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extern char *strpbrk (const char *__s, const char *__accept)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Find the first occurrence of NEEDLE in HAYSTACK. */
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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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/* 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));
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__END_NAMESPACE_STD
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/* Divide S into tokens separated by characters in DELIM. Information
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passed between calls are stored in SAVE_PTR. */
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#if 0 /* uClibc: disabled */
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extern char *__strtok_r (char *__restrict __s,
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const char *__restrict __delim,
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char **__restrict __save_ptr)
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__THROW __nonnull ((2, 3));
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#endif
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#if defined __USE_POSIX || defined __USE_MISC
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extern char *strtok_r (char *__restrict __s, const char *__restrict __delim,
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char **__restrict __save_ptr)
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__THROW __nonnull ((2, 3));
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#endif
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#ifdef __USE_GNU
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/* Similar to `strstr' but this function ignores the case of both strings. */
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extern char *strcasestr (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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#ifdef __USE_GNU
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/* Find the first occurrence of NEEDLE in HAYSTACK.
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NEEDLE is NEEDLELEN bytes long;
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HAYSTACK is HAYSTACKLEN bytes long. */
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extern void *memmem (const void *__haystack, size_t __haystacklen,
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const void *__needle, size_t __needlelen)
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__THROW __attribute_pure__ __nonnull ((1, 3));
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/* Copy N bytes of SRC to DEST, return pointer to bytes after the
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last written byte. */
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#if __GNUC_PREREQ (3, 4)
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# define __mempcpy(dest, src, n) __builtin_mempcpy(dest, src, n)
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#else /* uClibc: disabled */
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extern void *__mempcpy (void *__restrict __dest,
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const void *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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#endif
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extern void *mempcpy (void *__restrict __dest,
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const void *__restrict __src, size_t __n)
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__THROW __nonnull ((1, 2));
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#endif
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__BEGIN_NAMESPACE_STD
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/* Return the length of S. */
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extern size_t strlen (const char *__s)
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__THROW __attribute_pure__ __nonnull ((1));
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__END_NAMESPACE_STD
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#ifdef __USE_XOPEN2K8
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/* Find the length of STRING, but scan at most MAXLEN characters.
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If no '\0' terminator is found in that many characters, return MAXLEN. */
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extern size_t strnlen (const char *__string, size_t __maxlen)
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__THROW __attribute_pure__ __nonnull ((1));
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#endif
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__BEGIN_NAMESPACE_STD
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/* Return a string describing the meaning of the `errno' code in ERRNUM. */
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extern char *strerror (int __errnum) __THROW;
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__END_NAMESPACE_STD
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#if defined __USE_XOPEN2K || defined __USE_MISC
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/* Reentrant version of `strerror'.
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There are 2 flavors of `strerror_r', GNU which returns the string
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and may or may not use the supplied temporary buffer and POSIX one
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which fills the string into the buffer.
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To use the POSIX version, -D_XOPEN_SOURCE=600 or -D_POSIX_C_SOURCE=200112L
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without -D_GNU_SOURCE is needed, otherwise the GNU version is
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preferred. */
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# if defined __USE_XOPEN2K && !defined __USE_GNU
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/* Fill BUF with a string describing the meaning of the `errno' code in
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ERRNUM. */
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extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
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__THROW __nonnull ((2));
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# ifdef __REDIRECT_NTH
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extern int __REDIRECT_NTH (strerror_r,
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(int __errnum, char *__buf, size_t __buflen),
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__xpg_strerror_r) __nonnull ((2));
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# else
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# define strerror_r __xpg_strerror_r
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# endif
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# else
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/* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
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used. */
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extern char *__glibc_strerror_r (int __errnum, char *__buf, size_t __buflen)
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__THROW __nonnull ((2));
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# ifdef __REDIRECT_NTH
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extern char * __REDIRECT_NTH (strerror_r,
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(int __errnum, char *__buf, size_t __buflen),
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__glibc_strerror_r) __nonnull ((2));
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# else
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# define strerror_r __glibc_strerror_r
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# endif
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# endif
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#endif
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#if 0 /*defined __USE_XOPEN2K8 && defined __UCLIBC_HAS_XLOCALE__*/
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/* Translate error number to string according to the locale L. */
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extern char *strerror_l (int __errnum, __locale_t __l) __THROW;
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#endif
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/* We define this function always since `bzero' is sometimes needed when
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the namespace rules does not allow this. */
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#if 0 /* uClibc: disabled */
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extern void __bzero (void *__s, size_t __n) __THROW __nonnull ((1));
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#endif
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#ifdef __USE_BSD
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/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
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extern void bcopy (const void *__src, void *__dest, size_t __n)
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__THROW __nonnull ((1, 2));
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/* Set N bytes of S to 0. */
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extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));
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/* Compare N bytes of S1 and S2 (same as memcmp). */
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extern int bcmp (const void *__s1, const void *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Find the first occurrence of C in S (same as strchr). */
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extern char *index (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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/* Find the last occurrence of C in S (same as strrchr). */
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extern char *rindex (const char *__s, int __c)
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__THROW __attribute_pure__ __nonnull ((1));
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/* Return the position of the first bit set in I, or 0 if none are set.
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The least-significant bit is position 1, the most-significant 32. */
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extern int ffs (int __i) __THROW __attribute__ ((__const__));
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/* The following two functions are non-standard but necessary for non-32 bit
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platforms. */
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#ifdef __USE_GNU
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extern int ffsl (long int __l) __THROW __attribute__ ((__const__));
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# ifdef __GNUC__
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__extension__ extern int ffsll (long long int __ll)
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__THROW __attribute__ ((__const__));
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# endif
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# endif
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/* Compare S1 and S2, ignoring case. */
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extern int strcasecmp (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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/* Compare no more than N chars of S1 and S2, ignoring case. */
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extern int strncasecmp (const char *__s1, const char *__s2, size_t __n)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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#endif /* Use BSD. */
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#if defined __USE_XOPEN2K8 && defined __UCLIBC_HAS_XLOCALE__
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/* Again versions of a few functions which use the given locale instead
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of the global one. */
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extern int strcasecmp_l (const char *__s1, const char *__s2,
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__locale_t __loc)
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__THROW __attribute_pure__ __nonnull ((1, 2, 3));
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extern int strncasecmp_l (const char *__s1, const char *__s2,
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size_t __n, __locale_t __loc)
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__THROW __attribute_pure__ __nonnull ((1, 2, 4));
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#endif
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#ifdef __USE_BSD
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/* Return the next DELIM-delimited token from *STRINGP,
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terminating it with a '\0', and update *STRINGP to point past it. */
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extern char *strsep (char **__restrict __stringp,
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const char *__restrict __delim)
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__THROW __nonnull ((1, 2));
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#endif
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#ifdef __USE_XOPEN2K8
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/* Return a string describing the meaning of the signal number in SIG. */
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extern char *strsignal (int __sig) __THROW;
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/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
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# if 0 /* uClibc: disabled */
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extern char *__stpcpy (char *__restrict __dest, const char *__restrict __src)
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__THROW __nonnull ((1, 2));
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# endif
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extern char *stpcpy (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, returning the address of
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the last character written into DEST. */
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# if 0 /* uClibc: disabled */
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extern char *__stpncpy (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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# endif
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extern char *stpncpy (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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#endif
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#ifdef __USE_GNU
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/* Compare S1 and S2 as strings holding name & indices/version numbers. */
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extern int strverscmp (const char *__s1, const char *__s2)
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__THROW __attribute_pure__ __nonnull ((1, 2));
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# if 0 /* uClibc does not support strfry or memfrob. */
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/* Sautee STRING briskly. */
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extern char *strfry (char *__string) __THROW __nonnull ((1));
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/* Frobnicate N bytes of S. */
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extern void *memfrob (void *__s, size_t __n) __THROW __nonnull ((1));
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# endif
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# ifndef basename
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/* Return the file name within directory of FILENAME. We don't
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declare the function if the `basename' macro is available (defined
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in <libgen.h>) which makes the XPG version of this function
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available. */
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extern char *basename (const char *__filename) __THROW __nonnull ((1));
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# endif
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#endif /* __USE_GNU */
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#ifdef __USE_BSD
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/* Two OpenBSD extension functions. */
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extern size_t strlcat(char *__restrict dst, const char *__restrict src,
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size_t n) __THROW __nonnull ((1, 2));
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extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
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size_t n) __THROW __nonnull ((1, 2));
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#endif
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__END_DECLS
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#endif /* string.h */
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