mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 17:11:06 +00:00
366 lines
14 KiB
C
366 lines
14 KiB
C
/* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/*
|
|
* ISO C99 Standard: 7.21 String handling <string.h>
|
|
*/
|
|
|
|
#ifndef _STRING_H
|
|
#define _STRING_H 1
|
|
|
|
#include <features.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Get size_t and NULL from <stddef.h>. */
|
|
#define __need_size_t
|
|
#define __need_NULL
|
|
#include <stddef.h>
|
|
|
|
|
|
/* Copy N bytes of SRC to DEST. */
|
|
extern void *memcpy (void *__restrict __dest,
|
|
__const void *__restrict __src, size_t __n) __THROW;
|
|
/* Copy N bytes of SRC to DEST, guaranteeing
|
|
correct behavior for overlapping strings. */
|
|
extern void *memmove (void *__dest, __const void *__src, size_t __n)
|
|
__THROW;
|
|
|
|
/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
|
|
Return the position in DEST one byte past where C was copied,
|
|
or NULL if C was not found in the first N bytes of SRC. */
|
|
#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN
|
|
extern void *memccpy (void *__restrict __dest, __const void *__restrict __src,
|
|
int __c, size_t __n)
|
|
__THROW;
|
|
#endif /* SVID. */
|
|
|
|
|
|
/* Set N bytes of S to C. */
|
|
extern void *memset (void *__s, int __c, size_t __n) __THROW;
|
|
|
|
/* Compare N bytes of S1 and S2. */
|
|
extern int memcmp (__const void *__s1, __const void *__s2, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
|
|
/* Search N bytes of S for C. */
|
|
extern void *memchr (__const void *__s, int __c, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
|
|
#ifdef __USE_GNU
|
|
/* Search in S for C. This is similar to `memchr' but there is no
|
|
length limit. */
|
|
extern void *rawmemchr (__const void *__s, int __c) __THROW __attribute_pure__;
|
|
|
|
/* Search N bytes of S for the final occurrence of C. */
|
|
extern void *memrchr (__const void *__s, int __c, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
#endif
|
|
|
|
|
|
/* Copy SRC to DEST. */
|
|
extern char *strcpy (char *__restrict __dest, __const char *__restrict __src)
|
|
__THROW;
|
|
/* Copy no more than N characters of SRC to DEST. */
|
|
extern char *strncpy (char *__restrict __dest,
|
|
__const char *__restrict __src, size_t __n) __THROW;
|
|
|
|
/* Append SRC onto DEST. */
|
|
extern char *strcat (char *__restrict __dest, __const char *__restrict __src)
|
|
__THROW;
|
|
/* Append no more than N characters from SRC onto DEST. */
|
|
extern char *strncat (char *__restrict __dest, __const char *__restrict __src,
|
|
size_t __n) __THROW;
|
|
|
|
/* Compare S1 and S2. */
|
|
extern int strcmp (__const char *__s1, __const char *__s2)
|
|
__THROW __attribute_pure__;
|
|
/* Compare N characters of S1 and S2. */
|
|
extern int strncmp (__const char *__s1, __const char *__s2, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
|
|
/* Compare the collated forms of S1 and S2. */
|
|
extern int strcoll (__const char *__s1, __const char *__s2)
|
|
__THROW __attribute_pure__;
|
|
/* Put a transformation of SRC into no more than N bytes of DEST. */
|
|
extern size_t strxfrm (char *__restrict __dest,
|
|
__const char *__restrict __src, size_t __n) __THROW;
|
|
|
|
#ifdef __USE_GNU
|
|
/* The following functions are equivalent to the both above but they
|
|
take the locale they use for the collation as an extra argument.
|
|
This is not standardsized but something like will come. */
|
|
# include <xlocale.h>
|
|
|
|
/* Compare the collated forms of S1 and S2 using rules from L. */
|
|
extern int __strcoll_l (__const char *__s1, __const char *__s2, __locale_t __l)
|
|
__THROW __attribute_pure__;
|
|
/* Put a transformation of SRC into no more than N bytes of DEST. */
|
|
extern size_t __strxfrm_l (char *__dest, __const char *__src, size_t __n,
|
|
__locale_t __l) __THROW;
|
|
#endif
|
|
|
|
#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
|
/* Duplicate S, returning an identical malloc'd string. */
|
|
extern char *strdup (__const char *__s) __THROW __attribute_malloc__;
|
|
#endif
|
|
|
|
/* Return a malloc'd copy of at most N bytes of STRING. The
|
|
resultant string is terminated even if no null terminator
|
|
appears before STRING[N]. */
|
|
#if defined __USE_GNU
|
|
extern char *strndup (__const char *__string, size_t __n)
|
|
__THROW __attribute_malloc__;
|
|
#endif
|
|
|
|
#if defined __USE_GNU && defined __GNUC__
|
|
/* Duplicate S, returning an identical alloca'd string. */
|
|
# define strdupa(s) \
|
|
(__extension__ \
|
|
({ \
|
|
__const char *__old = (s); \
|
|
size_t __len = strlen (__old) + 1; \
|
|
char *__new = (char *) __builtin_alloca (__len); \
|
|
(char *) memcpy (__new, __old, __len); \
|
|
}))
|
|
|
|
/* Return an alloca'd copy of at most N bytes of string. */
|
|
# define strndupa(s, n) \
|
|
(__extension__ \
|
|
({ \
|
|
__const char *__old = (s); \
|
|
size_t __len = strnlen (__old, (n)); \
|
|
char *__new = (char *) __builtin_alloca (__len + 1); \
|
|
__new[__len] = '\0'; \
|
|
(char *) memcpy (__new, __old, __len); \
|
|
}))
|
|
#endif
|
|
|
|
/* Find the first occurrence of C in S. */
|
|
extern char *strchr (__const char *__s, int __c) __THROW __attribute_pure__;
|
|
/* Find the last occurrence of C in S. */
|
|
extern char *strrchr (__const char *__s, int __c) __THROW __attribute_pure__;
|
|
|
|
#ifdef __USE_GNU
|
|
/* This funciton is similar to `strchr'. But it returns a pointer to
|
|
the closing NUL byte in case C is not found in S. */
|
|
extern char *strchrnul (__const char *__s, int __c) __THROW __attribute_pure__;
|
|
#endif
|
|
|
|
/* Return the length of the initial segment of S which
|
|
consists entirely of characters not in REJECT. */
|
|
extern size_t strcspn (__const char *__s, __const char *__reject)
|
|
__THROW __attribute_pure__;
|
|
/* Return the length of the initial segment of S which
|
|
consists entirely of characters in ACCEPT. */
|
|
extern size_t strspn (__const char *__s, __const char *__accept)
|
|
__THROW __attribute_pure__;
|
|
/* Find the first occurrence in S of any character in ACCEPT. */
|
|
extern char *strpbrk (__const char *__s, __const char *__accept)
|
|
__THROW __attribute_pure__;
|
|
/* Find the first occurrence of NEEDLE in HAYSTACK. */
|
|
extern char *strstr (__const char *__haystack, __const char *__needle)
|
|
__THROW __attribute_pure__;
|
|
|
|
#ifdef __USE_GNU
|
|
/* Similar to `strstr' but this function ignores the case of both strings. */
|
|
extern char *strcasestr (__const char *__haystack, __const char *__needle)
|
|
__THROW __attribute_pure__;
|
|
#endif
|
|
|
|
/* Divide S into tokens separated by characters in DELIM. */
|
|
extern char *strtok (char *__restrict __s, __const char *__restrict __delim)
|
|
__THROW;
|
|
|
|
/* 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;
|
|
#if defined __USE_POSIX || defined __USE_MISC
|
|
extern char *strtok_r (char *__restrict __s, __const char *__restrict __delim,
|
|
char **__restrict __save_ptr) __THROW;
|
|
#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__;
|
|
|
|
/* 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;
|
|
extern void *mempcpy (void *__restrict __dest,
|
|
__const void *__restrict __src, size_t __n) __THROW;
|
|
#endif
|
|
|
|
|
|
/* Return the length of S. */
|
|
extern size_t strlen (__const char *__s) __THROW __attribute_pure__;
|
|
|
|
#ifdef __USE_GNU
|
|
/* 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__;
|
|
#endif
|
|
|
|
|
|
/* Return a string describing the meaning of the `errno' code in ERRNUM. */
|
|
extern char *strerror (int __errnum) __THROW;
|
|
#ifdef __USE_MISC
|
|
/* Reentrant version of `strerror'. 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;
|
|
#endif
|
|
|
|
/* We define this function always since `bzero' is sometimes needed when
|
|
the namespace rules does not allow this. */
|
|
extern void __bzero (void *__s, size_t __n) __THROW;
|
|
|
|
#if defined __USE_BSD
|
|
/* Copy N bytes of SRC to DEST (like memmove, but args reversed). */
|
|
extern void bcopy (__const void *__src, void *__dest, size_t __n) __THROW;
|
|
|
|
/* Set N bytes of S to 0. */
|
|
extern void bzero (void *__s, size_t __n) __THROW;
|
|
|
|
/* Compare N bytes of S1 and S2 (same as memcmp). */
|
|
extern int bcmp (__const void *__s1, __const void *__s2, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
|
|
/* Find the first occurrence of C in S (same as strchr). */
|
|
extern char *index (__const char *__s, int __c) __THROW __attribute_pure__;
|
|
|
|
/* Find the last occurrence of C in S (same as strrchr). */
|
|
extern char *rindex (__const char *__s, int __c) __THROW __attribute_pure__;
|
|
|
|
/* Return the position of the first bit set in I, or 0 if none are set.
|
|
The least-significant bit is position 1, the most-significant 32. */
|
|
extern int ffs (int __i) __THROW __attribute__ ((const));
|
|
|
|
/* The following two functions are non-standard but necessary for non-32 bit
|
|
platforms. */
|
|
# ifdef __USE_GNU
|
|
extern int ffsl (long int __l) __THROW __attribute__ ((const));
|
|
# ifdef __GNUC__
|
|
__extension__ extern int ffsll (long long int __ll)
|
|
__THROW __attribute__ ((const));
|
|
# endif
|
|
# endif
|
|
|
|
/* Compare S1 and S2, ignoring case. */
|
|
extern int strcasecmp (__const char *__s1, __const char *__s2)
|
|
__THROW __attribute_pure__;
|
|
|
|
/* Compare no more than N chars of S1 and S2, ignoring case. */
|
|
extern int strncasecmp (__const char *__s1, __const char *__s2, size_t __n)
|
|
__THROW __attribute_pure__;
|
|
#endif /* Use BSD. */
|
|
|
|
#ifdef __USE_GNU
|
|
/* Again versions of a few functions which use the given locale instead
|
|
of the global one. */
|
|
extern int __strcasecmp_l (__const char *__s1, __const char *__s2,
|
|
__locale_t __loc) __THROW __attribute_pure__;
|
|
|
|
extern int __strncasecmp_l (__const char *__s1, __const char *__s2,
|
|
size_t __n, __locale_t __loc)
|
|
__THROW __attribute_pure__;
|
|
#endif
|
|
|
|
#ifdef __USE_BSD
|
|
/* 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;
|
|
#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__;
|
|
|
|
/* 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;
|
|
extern char *stpcpy (char *__restrict __dest, __const char *__restrict __src)
|
|
__THROW;
|
|
|
|
/* 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;
|
|
extern char *stpncpy (char *__restrict __dest,
|
|
__const char *__restrict __src, size_t __n) __THROW;
|
|
|
|
/* Sautee STRING briskly. */
|
|
extern char *strfry (char *__string) __THROW;
|
|
|
|
/* Frobnicate N bytes of S. */
|
|
extern void *memfrob (void *__s, size_t __n) __THROW;
|
|
|
|
# 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. */
|
|
extern char *basename (__const char *__filename) __THROW;
|
|
# endif
|
|
#endif
|
|
|
|
|
|
#if defined __GNUC__ && __GNUC__ >= 2
|
|
# if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ && !defined __cplusplus
|
|
/* When using GNU CC we provide some optimized versions of selected
|
|
functions from this header. There are two kinds of optimizations:
|
|
|
|
- machine-dependent optimizations, most probably using inline
|
|
assembler code; these might be quite expensive since the code
|
|
size can increase significantly.
|
|
These optimizations are not used unless the symbol
|
|
__USE_STRING_INLINES
|
|
is defined before including this header.
|
|
|
|
- machine-independent optimizations which do not increase the
|
|
code size significantly and which optimize mainly situations
|
|
where one or more arguments are compile-time constants.
|
|
These optimizations are used always when the compiler is
|
|
taught to optimize.
|
|
|
|
One can inhibit all optimizations by defining __NO_STRING_INLINES. */
|
|
|
|
/* Get the machine-dependent optimizations (if any). */
|
|
# include <bits/string.h>
|
|
|
|
/* These are generic optimizations which do not add too much inline code. */
|
|
# include <bits/string2.h>
|
|
# endif
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* string.h */
|