382 lines
14 KiB
C
382 lines
14 KiB
C
/* Copyright (C) 1991-1993, 1995-2002, 2003 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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) __THROW;
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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;
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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;
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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;
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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__;
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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__;
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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) __THROW __attribute_pure__;
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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__;
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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;
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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) __THROW;
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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;
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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;
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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__;
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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__;
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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__;
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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) __THROW;
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__END_NAMESPACE_STD
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#ifdef __USE_GNU
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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__;
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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;
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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) __THROW __attribute_malloc__;
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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_GNU
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extern char *strndup (__const char *__string, size_t __n)
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__THROW __attribute_malloc__;
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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) __THROW __attribute_pure__;
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/* Find the last occurrence of C in S. */
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extern char *strrchr (__const char *__s, int __c) __THROW __attribute_pure__;
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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) __THROW __attribute_pure__;
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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__;
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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__;
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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__;
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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__;
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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;
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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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extern char *__strtok_r (char *__restrict __s,
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__const char *__restrict __delim,
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char **__restrict __save_ptr) __THROW;
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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) __THROW;
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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__;
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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__;
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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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extern void *__mempcpy (void *__restrict __dest,
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__const void *__restrict __src, size_t __n) __THROW;
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extern void *mempcpy (void *__restrict __dest,
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__const void *__restrict __src, size_t __n) __THROW;
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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) __THROW __attribute_pure__;
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__END_NAMESPACE_STD
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#ifdef __USE_GNU
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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__;
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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'. If a temporary buffer is required, at
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most BUFLEN bytes of BUF will be used. */
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extern char *strerror_r (int __errnum, char *__buf, size_t __buflen) __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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extern void __bzero (void *__s, size_t __n) __THROW;
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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) __THROW;
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/* Set N bytes of S to 0. */
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extern void bzero (void *__s, size_t __n) __THROW;
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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__;
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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) __THROW __attribute_pure__;
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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) __THROW __attribute_pure__;
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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__;
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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__;
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#endif /* Use BSD. */
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#ifdef __USE_GNU
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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) __THROW __attribute_pure__;
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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__;
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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) __THROW;
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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__;
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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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extern char *__stpcpy (char *__restrict __dest, __const char *__restrict __src)
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__THROW;
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extern char *stpcpy (char *__restrict __dest, __const char *__restrict __src)
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__THROW;
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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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extern char *__stpncpy (char *__restrict __dest,
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__const char *__restrict __src, size_t __n) __THROW;
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extern char *stpncpy (char *__restrict __dest,
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__const char *__restrict __src, size_t __n) __THROW;
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/* Sautee STRING briskly. */
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extern char *strfry (char *__string) __THROW;
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/* Frobnicate N bytes of S. */
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extern void *memfrob (void *__s, size_t __n) __THROW;
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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;
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# endif
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#endif
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#if defined __GNUC__ && __GNUC__ >= 2
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# if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
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&& !defined __NO_INLINE__ && !defined __cplusplus
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/* When using GNU CC we provide some optimized versions of selected
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functions from this header. There are two kinds of optimizations:
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- machine-dependent optimizations, most probably using inline
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assembler code; these might be quite expensive since the code
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size can increase significantly.
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These optimizations are not used unless the symbol
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__USE_STRING_INLINES
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is defined before including this header.
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- machine-independent optimizations which do not increase the
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code size significantly and which optimize mainly situations
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where one or more arguments are compile-time constants.
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These optimizations are used always when the compiler is
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taught to optimize.
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One can inhibit all optimizations by defining __NO_STRING_INLINES. */
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/* Get the machine-dependent optimizations (if any). */
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# include <bits/string.h>
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/* These are generic optimizations which do not add too much inline code. */
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# include <bits/string2.h>
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# endif
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#endif
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__END_DECLS
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#endif /* string.h */
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