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- /* Copyright (C) 1991-1993, 1995-2003, 2004 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; 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>
- __BEGIN_NAMESPACE_STD
- /* Copy N bytes of SRC to DEST. */
- extern void *memcpy (void *__restrict __dest,
- __const void *__restrict __src, size_t __n)
- __THROW __nonnull ((1, 2));
- /* 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 __nonnull ((1, 2));
- __END_NAMESPACE_STD
- /* 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 __nonnull ((1, 2));
- #endif /* SVID. */
- __BEGIN_NAMESPACE_STD
- /* Set N bytes of S to C. */
- extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull ((1));
- /* Compare N bytes of S1 and S2. */
- extern int memcmp (__const void *__s1, __const void *__s2, size_t __n)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* Search N bytes of S for C. */
- extern void *memchr (__const void *__s, int __c, size_t __n)
- __THROW __attribute_pure__ __nonnull ((1));
- __END_NAMESPACE_STD
- #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__ __nonnull ((1));
- /* 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__ __nonnull ((1));
- #endif
- __BEGIN_NAMESPACE_STD
- /* Copy SRC to DEST. */
- extern char *strcpy (char *__restrict __dest, __const char *__restrict __src)
- __THROW __nonnull ((1, 2));
- /* Copy no more than N characters of SRC to DEST. */
- extern char *strncpy (char *__restrict __dest,
- __const char *__restrict __src, size_t __n)
- __THROW __nonnull ((1, 2));
- /* Append SRC onto DEST. */
- extern char *strcat (char *__restrict __dest, __const char *__restrict __src)
- __THROW __nonnull ((1, 2));
- /* Append no more than N characters from SRC onto DEST. */
- extern char *strncat (char *__restrict __dest, __const char *__restrict __src,
- size_t __n) __THROW __nonnull ((1, 2));
- /* Compare S1 and S2. */
- extern int strcmp (__const char *__s1, __const char *__s2)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* Compare N characters of S1 and S2. */
- extern int strncmp (__const char *__s1, __const char *__s2, size_t __n)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* Compare the collated forms of S1 and S2. */
- extern int strcoll (__const char *__s1, __const char *__s2)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* 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 __nonnull ((2));
- __END_NAMESPACE_STD
- #ifdef __UCLIBC_HAS_XLOCALE__
- #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__ __nonnull ((1, 2, 3));
- extern int __strcoll_l (__const char *__s1, __const char *__s2, __locale_t __l)
- __THROW __attribute_pure__ __nonnull ((1, 2, 3));
- /* 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 __nonnull ((2, 4));
- extern size_t __strxfrm_l (char *__dest, __const char *__src, size_t __n,
- __locale_t __l) __THROW __nonnull ((2, 4));
- #endif
- #endif /* __UCLIBC_HAS_XLOCALE__ */
- #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__ __nonnull ((1));
- #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__ __nonnull ((1));
- #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
- __BEGIN_NAMESPACE_STD
- /* Find the first occurrence of C in S. */
- extern char *strchr (__const char *__s, int __c)
- __THROW __attribute_pure__ __nonnull ((1));
- /* Find the last occurrence of C in S. */
- extern char *strrchr (__const char *__s, int __c)
- __THROW __attribute_pure__ __nonnull ((1));
- __END_NAMESPACE_STD
- #ifdef __USE_GNU
- /* This function 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__ __nonnull ((1));
- #endif
- __BEGIN_NAMESPACE_STD
- /* 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__ __nonnull ((1, 2));
- /* 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__ __nonnull ((1, 2));
- /* Find the first occurrence in S of any character in ACCEPT. */
- extern char *strpbrk (__const char *__s, __const char *__accept)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* Find the first occurrence of NEEDLE in HAYSTACK. */
- extern char *strstr (__const char *__haystack, __const char *__needle)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- /* Divide S into tokens separated by characters in DELIM. */
- extern char *strtok (char *__restrict __s, __const char *__restrict __delim)
- __THROW __nonnull ((2));
- __END_NAMESPACE_STD
- /* 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));
- #if defined __USE_POSIX || defined __USE_MISC
- 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. */
- extern char *strcasestr (__const char *__haystack, __const char *__needle)
- __THROW __attribute_pure__ __nonnull ((1, 2));
- #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
- __BEGIN_NAMESPACE_STD
- /* Return the length of S. */
- extern size_t strlen (__const char *__s)
- __THROW __attribute_pure__ __nonnull ((1));
- __END_NAMESPACE_STD
- #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__ __nonnull ((1));
- #endif
- __BEGIN_NAMESPACE_STD
- /* Return a string describing the meaning of the `errno' code in ERRNUM. */
- extern char *strerror (int __errnum) __THROW;
- __END_NAMESPACE_STD
- extern char *__glibc_strerror_r (int __errnum, char *__buf, size_t __buflen)
- __THROW __nonnull ((2));
- extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen)
- __THROW __nonnull ((2));
- #if defined __USE_XOPEN2K || defined __USE_MISC
- /* 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
- extern int __REDIRECT (strerror_r,
- (int __errnum, char *__buf, size_t __buflen),
- __xpg_strerror_r) __nonnull ((2));
- # else
- # define strerror_r __xpg_strerror_r
- # endif
- # else
- /* If a temporary buffer is required, at most BUFLEN bytes of BUF will be
- used. */
- # ifdef __REDIRECT
- extern char * __REDIRECT (strerror_r,
- (int __errnum, char *__buf, size_t __buflen),
- __glibc_strerror_r) __nonnull ((2));
- # else
- # define strerror_r __glibc_strerror_r
- # endif
- # endif
- #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 __nonnull ((1));
- #ifdef __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 __nonnull ((1, 2));
- /* Set N bytes of S to 0. */
- extern void bzero (void *__s, size_t __n) __THROW __nonnull ((1));
- /* 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__ __nonnull ((1, 2));
- /* Find the first occurrence of C in S (same as strchr). */
- extern char *index (__const char *__s, int __c)
- __THROW __attribute_pure__ __nonnull ((1));
- /* Find the last occurrence of C in S (same as strrchr). */
- extern char *rindex (__const char *__s, int __c)
- __THROW __attribute_pure__ __nonnull ((1));
- /* 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__ __nonnull ((1, 2));
- /* 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__ __nonnull ((1, 2));
- #endif /* Use BSD. */
- #ifdef __UCLIBC_HAS_XLOCALE__
- #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__ __nonnull ((1, 2, 3));
- extern int __strcasecmp_l (__const char *__s1, __const char *__s2,
- __locale_t __loc)
- __THROW __attribute_pure__ __nonnull ((1, 2, 3));
- extern int strncasecmp_l (__const char *__s1, __const char *__s2,
- size_t __n, __locale_t __loc)
- __THROW __attribute_pure__ __nonnull ((1, 2, 4));
- extern int __strncasecmp_l (__const char *__s1, __const char *__s2,
- size_t __n, __locale_t __loc)
- __THROW __attribute_pure__ __nonnull ((1, 2, 4));
- #endif
- #endif /* __UCLIBC_HAS_XLOCALE__ */
- #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 __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));
- /* 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));
- #if 0 /* uClibc does not support strfry or memfrob. */
- /* 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));
- #endif
- # 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 __nonnull ((1));
- # endif
- #endif
- #ifdef __USE_BSD
- /* Two OpenBSD extension functions. */
- extern size_t strlcat(char *__restrict dst, const char *__restrict src,
- size_t n) __THROW __nonnull ((1, 2));
- extern size_t strlcpy(char *__restrict dst, const char *__restrict src,
- size_t n) __THROW __nonnull ((1, 2));
- #endif
- __END_DECLS
- #endif /* string.h */
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