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+/* A GNU-like <string.h>.
+
+ Copyright (C) 1995-1996, 2001-2009 Free Software Foundation, Inc.
+
+ This program 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, or (at your option)
+ any later version.
+
+ This program 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 this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef _GL_STRING_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+
+/* The include_next requires a split double-inclusion guard. */
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#ifndef _GL_STRING_H
+#define _GL_STRING_H
+
+
+#ifndef __attribute__
+/* This feature is available in gcc versions 2.5 and later. */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
+# define __attribute__(Spec) /* empty */
+# endif
+/* The attribute __pure__ was added in gcc 2.96. */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
+# define __pure__ /* empty */
+# endif
+#endif
+
+
+/* The definition of GL_LINK_WARNING is copied here. */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/* Return the first instance of C within N bytes of S, or NULL. */
+#if @GNULIB_MEMCHR@
+# if @REPLACE_MEMCHR@
+# define memchr rpl_memchr
+extern void *memchr (void const *__s, int __c, size_t __n)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memchr
+# define memchr(s,c,n) \
+ (GL_LINK_WARNING ("memchr has platform-specific bugs - " \
+ "use gnulib module memchr for portability" ), \
+ memchr (s, c, n))
+#endif
+
+/* Return the first occurrence of NEEDLE in HAYSTACK. */
+#if @GNULIB_MEMMEM@
+# if @REPLACE_MEMMEM@
+# define memmem rpl_memmem
+# endif
+# if ! @HAVE_DECL_MEMMEM@ || @REPLACE_MEMMEM@
+extern void *memmem (void const *__haystack, size_t __haystack_len,
+ void const *__needle, size_t __needle_len)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memmem
+# define memmem(a,al,b,bl) \
+ (GL_LINK_WARNING ("memmem is unportable and often quadratic - " \
+ "use gnulib module memmem-simple for portability, " \
+ "and module memmem for speed" ), \
+ memmem (a, al, b, bl))
+#endif
+
+/* Copy N bytes of SRC to DEST, return pointer to bytes after the
+ last written byte. */
+#if @GNULIB_MEMPCPY@
+# if ! @HAVE_MEMPCPY@
+extern void *mempcpy (void *restrict __dest, void const *restrict __src,
+ size_t __n);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef mempcpy
+# define mempcpy(a,b,n) \
+ (GL_LINK_WARNING ("mempcpy is unportable - " \
+ "use gnulib module mempcpy for portability"), \
+ mempcpy (a, b, n))
+#endif
+
+/* Search backwards through a block for a byte (specified as an int). */
+#if @GNULIB_MEMRCHR@
+# if ! @HAVE_DECL_MEMRCHR@
+extern void *memrchr (void const *, int, size_t)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef memrchr
+# define memrchr(a,b,c) \
+ (GL_LINK_WARNING ("memrchr is unportable - " \
+ "use gnulib module memrchr for portability"), \
+ memrchr (a, b, c))
+#endif
+
+/* Find the first occurrence of C in S. More efficient than
+ memchr(S,C,N), at the expense of undefined behavior if C does not
+ occur within N bytes. */
+#if @GNULIB_RAWMEMCHR@
+# if ! @HAVE_RAWMEMCHR@
+extern void *rawmemchr (void const *__s, int __c_in)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef rawmemchr
+# define rawmemchr(a,b) \
+ (GL_LINK_WARNING ("rawmemchr is unportable - " \
+ "use gnulib module rawmemchr for portability"), \
+ rawmemchr (a, b))
+#endif
+
+/* Copy SRC to DST, returning the address of the terminating '\0' in DST. */
+#if @GNULIB_STPCPY@
+# if ! @HAVE_STPCPY@
+extern char *stpcpy (char *restrict __dst, char const *restrict __src);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef stpcpy
+# define stpcpy(a,b) \
+ (GL_LINK_WARNING ("stpcpy is unportable - " \
+ "use gnulib module stpcpy for portability"), \
+ stpcpy (a, b))
+#endif
+
+/* Copy no more than N bytes of SRC to DST, returning a pointer past the
+ last non-NUL byte written into DST. */
+#if @GNULIB_STPNCPY@
+# if ! @HAVE_STPNCPY@
+# define stpncpy gnu_stpncpy
+extern char *stpncpy (char *restrict __dst, char const *restrict __src,
+ size_t __n);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef stpncpy
+# define stpncpy(a,b,n) \
+ (GL_LINK_WARNING ("stpncpy is unportable - " \
+ "use gnulib module stpncpy for portability"), \
+ stpncpy (a, b, n))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strchr() does not work with multibyte strings if the locale encoding is
+ GB18030 and the character to be searched is a digit. */
+# undef strchr
+# define strchr(s,c) \
+ (GL_LINK_WARNING ("strchr cannot work correctly on character strings " \
+ "in some multibyte locales - " \
+ "use mbschr if you care about internationalization"), \
+ strchr (s, c))
+#endif
+
+/* Find the first occurrence of C in S or the final NUL byte. */
+#if @GNULIB_STRCHRNUL@
+# if ! @HAVE_STRCHRNUL@
+extern char *strchrnul (char const *__s, int __c_in)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strchrnul
+# define strchrnul(a,b) \
+ (GL_LINK_WARNING ("strchrnul is unportable - " \
+ "use gnulib module strchrnul for portability"), \
+ strchrnul (a, b))
+#endif
+
+/* Duplicate S, returning an identical malloc'd string. */
+#if @GNULIB_STRDUP@
+# if @REPLACE_STRDUP@
+# undef strdup
+# define strdup rpl_strdup
+# endif
+# if !(@HAVE_DECL_STRDUP@ || defined strdup) || @REPLACE_STRDUP@
+extern char *strdup (char const *__s);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strdup
+# define strdup(a) \
+ (GL_LINK_WARNING ("strdup is unportable - " \
+ "use gnulib module strdup for portability"), \
+ strdup (a))
+#endif
+
+/* Return a newly allocated copy of at most N bytes of STRING. */
+#if @GNULIB_STRNDUP@
+# if ! @HAVE_STRNDUP@
+# undef strndup
+# define strndup rpl_strndup
+# endif
+# if ! @HAVE_STRNDUP@ || ! @HAVE_DECL_STRNDUP@
+extern char *strndup (char const *__string, size_t __n);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strndup
+# define strndup(a,n) \
+ (GL_LINK_WARNING ("strndup is unportable - " \
+ "use gnulib module strndup for portability"), \
+ strndup (a, n))
+#endif
+
+/* Find the length (number of bytes) of STRING, but scan at most
+ MAXLEN bytes. If no '\0' terminator is found in that many bytes,
+ return MAXLEN. */
+#if @GNULIB_STRNLEN@
+# if ! @HAVE_DECL_STRNLEN@
+extern size_t strnlen (char const *__string, size_t __maxlen)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strnlen
+# define strnlen(a,n) \
+ (GL_LINK_WARNING ("strnlen is unportable - " \
+ "use gnulib module strnlen for portability"), \
+ strnlen (a, n))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strcspn() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it does not work with multibyte strings if the
+ locale encoding is GB18030 and one of the characters to be searched is a
+ digit. */
+# undef strcspn
+# define strcspn(s,a) \
+ (GL_LINK_WARNING ("strcspn cannot work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbscspn if you care about internationalization"), \
+ strcspn (s, a))
+#endif
+
+/* Find the first occurrence in S of any character in ACCEPT. */
+#if @GNULIB_STRPBRK@
+# if ! @HAVE_STRPBRK@
+extern char *strpbrk (char const *__s, char const *__accept)
+ __attribute__ ((__pure__));
+# endif
+# if defined GNULIB_POSIXCHECK
+/* strpbrk() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it does not work with multibyte strings if the
+ locale encoding is GB18030 and one of the characters to be searched is a
+ digit. */
+# undef strpbrk
+# define strpbrk(s,a) \
+ (GL_LINK_WARNING ("strpbrk cannot work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbspbrk if you care about internationalization"), \
+ strpbrk (s, a))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strpbrk
+# define strpbrk(s,a) \
+ (GL_LINK_WARNING ("strpbrk is unportable - " \
+ "use gnulib module strpbrk for portability"), \
+ strpbrk (s, a))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strspn() assumes the second argument is a list of single-byte characters.
+ Even in this simple case, it cannot work with multibyte strings. */
+# undef strspn
+# define strspn(s,a) \
+ (GL_LINK_WARNING ("strspn cannot work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbsspn if you care about internationalization"), \
+ strspn (s, a))
+#endif
+
+#if defined GNULIB_POSIXCHECK
+/* strrchr() does not work with multibyte strings if the locale encoding is
+ GB18030 and the character to be searched is a digit. */
+# undef strrchr
+# define strrchr(s,c) \
+ (GL_LINK_WARNING ("strrchr cannot work correctly on character strings " \
+ "in some multibyte locales - " \
+ "use mbsrchr if you care about internationalization"), \
+ strrchr (s, c))
+#endif
+
+/* Search the next delimiter (char listed in DELIM) starting at *STRINGP.
+ If one is found, overwrite it with a NUL, and advance *STRINGP
+ to point to the next char after it. Otherwise, set *STRINGP to NULL.
+ If *STRINGP was already NULL, nothing happens.
+ Return the old value of *STRINGP.
+
+ This is a variant of strtok() that is multithread-safe and supports
+ empty fields.
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+ Caveat: It doesn't work with multibyte strings unless all of the delimiter
+ characters are ASCII characters < 0x30.
+
+ See also strtok_r(). */
+#if @GNULIB_STRSEP@
+# if ! @HAVE_STRSEP@
+extern char *strsep (char **restrict __stringp, char const *restrict __delim);
+# endif
+# if defined GNULIB_POSIXCHECK
+# undef strsep
+# define strsep(s,d) \
+ (GL_LINK_WARNING ("strsep cannot work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbssep if you care about internationalization"), \
+ strsep (s, d))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strsep
+# define strsep(s,d) \
+ (GL_LINK_WARNING ("strsep is unportable - " \
+ "use gnulib module strsep for portability"), \
+ strsep (s, d))
+#endif
+
+#if @GNULIB_STRSTR@
+# if @REPLACE_STRSTR@
+# define strstr rpl_strstr
+char *strstr (const char *haystack, const char *needle)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strstr() does not work with multibyte strings if the locale encoding is
+ different from UTF-8:
+ POSIX says that it operates on "strings", and "string" in POSIX is defined
+ as a sequence of bytes, not of characters. */
+# undef strstr
+# define strstr(a,b) \
+ (GL_LINK_WARNING ("strstr is quadratic on many systems, and cannot " \
+ "work correctly on character strings in most " \
+ "multibyte locales - " \
+ "use mbsstr if you care about internationalization, " \
+ "or use strstr if you care about speed"), \
+ strstr (a, b))
+#endif
+
+/* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
+ comparison. */
+#if @GNULIB_STRCASESTR@
+# if @REPLACE_STRCASESTR@
+# define strcasestr rpl_strcasestr
+# endif
+# if ! @HAVE_STRCASESTR@ || @REPLACE_STRCASESTR@
+extern char *strcasestr (const char *haystack, const char *needle)
+ __attribute__ ((__pure__));
+# endif
+#elif defined GNULIB_POSIXCHECK
+/* strcasestr() does not work with multibyte strings:
+ It is a glibc extension, and glibc implements it only for unibyte
+ locales. */
+# undef strcasestr
+# define strcasestr(a,b) \
+ (GL_LINK_WARNING ("strcasestr does work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbscasestr if you care about " \
+ "internationalization, or use c-strcasestr if you want " \
+ "a locale independent function"), \
+ strcasestr (a, b))
+#endif
+
+/* Parse S into tokens separated by characters in DELIM.
+ If S is NULL, the saved pointer in SAVE_PTR is used as
+ the next starting point. For example:
+ char s[] = "-abc-=-def";
+ char *sp;
+ x = strtok_r(s, "-", &sp); // x = "abc", sp = "=-def"
+ x = strtok_r(NULL, "-=", &sp); // x = "def", sp = NULL
+ x = strtok_r(NULL, "=", &sp); // x = NULL
+ // s = "abc\0-def\0"
+
+ This is a variant of strtok() that is multithread-safe.
+
+ For the POSIX documentation for this function, see:
+ http://www.opengroup.org/susv3xsh/strtok.html
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+ Caveat: It doesn't work with multibyte strings unless all of the delimiter
+ characters are ASCII characters < 0x30.
+
+ See also strsep(). */
+#if @GNULIB_STRTOK_R@
+# if ! @HAVE_DECL_STRTOK_R@
+extern char *strtok_r (char *restrict s, char const *restrict delim,
+ char **restrict save_ptr);
+# endif
+# if defined GNULIB_POSIXCHECK
+# undef strtok_r
+# define strtok_r(s,d,p) \
+ (GL_LINK_WARNING ("strtok_r cannot work correctly on character strings " \
+ "in multibyte locales - " \
+ "use mbstok_r if you care about internationalization"), \
+ strtok_r (s, d, p))
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strtok_r
+# define strtok_r(s,d,p) \
+ (GL_LINK_WARNING ("strtok_r is unportable - " \
+ "use gnulib module strtok_r for portability"), \
+ strtok_r (s, d, p))
+#endif
+
+
+/* The following functions are not specified by POSIX. They are gnulib
+ extensions. */
+
+#if @GNULIB_MBSLEN@
+/* Return the number of multibyte characters in the character string STRING.
+ This considers multibyte characters, unlike strlen, which counts bytes. */
+extern size_t mbslen (const char *string);
+#endif
+
+#if @GNULIB_MBSNLEN@
+/* Return the number of multibyte characters in the character string starting
+ at STRING and ending at STRING + LEN. */
+extern size_t mbsnlen (const char *string, size_t len);
+#endif
+
+#if @GNULIB_MBSCHR@
+/* Locate the first single-byte character C in the character string STRING,
+ and return a pointer to it. Return NULL if C is not found in STRING.
+ Unlike strchr(), this function works correctly in multibyte locales with
+ encodings such as GB18030. */
+# define mbschr rpl_mbschr /* avoid collision with HP-UX function */
+extern char * mbschr (const char *string, int c);
+#endif
+
+#if @GNULIB_MBSRCHR@
+/* Locate the last single-byte character C in the character string STRING,
+ and return a pointer to it. Return NULL if C is not found in STRING.
+ Unlike strrchr(), this function works correctly in multibyte locales with
+ encodings such as GB18030. */
+# define mbsrchr rpl_mbsrchr /* avoid collision with HP-UX function */
+extern char * mbsrchr (const char *string, int c);
+#endif
+
+#if @GNULIB_MBSSTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+ string HAYSTACK. Return NULL if NEEDLE is not found in HAYSTACK.
+ Unlike strstr(), this function works correctly in multibyte locales with
+ encodings different from UTF-8. */
+extern char * mbsstr (const char *haystack, const char *needle);
+#endif
+
+#if @GNULIB_MBSCASECMP@
+/* Compare the character strings S1 and S2, ignoring case, returning less than,
+ equal to or greater than zero if S1 is lexicographically less than, equal to
+ or greater than S2.
+ Note: This function may, in multibyte locales, return 0 for strings of
+ different lengths!
+ Unlike strcasecmp(), this function works correctly in multibyte locales. */
+extern int mbscasecmp (const char *s1, const char *s2);
+#endif
+
+#if @GNULIB_MBSNCASECMP@
+/* Compare the initial segment of the character string S1 consisting of at most
+ N characters with the initial segment of the character string S2 consisting
+ of at most N characters, ignoring case, returning less than, equal to or
+ greater than zero if the initial segment of S1 is lexicographically less
+ than, equal to or greater than the initial segment of S2.
+ Note: This function may, in multibyte locales, return 0 for initial segments
+ of different lengths!
+ Unlike strncasecmp(), this function works correctly in multibyte locales.
+ But beware that N is not a byte count but a character count! */
+extern int mbsncasecmp (const char *s1, const char *s2, size_t n);
+#endif
+
+#if @GNULIB_MBSPCASECMP@
+/* Compare the initial segment of the character string STRING consisting of
+ at most mbslen (PREFIX) characters with the character string PREFIX,
+ ignoring case, returning less than, equal to or greater than zero if this
+ initial segment is lexicographically less than, equal to or greater than
+ PREFIX.
+ Note: This function may, in multibyte locales, return 0 if STRING is of
+ smaller length than PREFIX!
+ Unlike strncasecmp(), this function works correctly in multibyte
+ locales. */
+extern char * mbspcasecmp (const char *string, const char *prefix);
+#endif
+
+#if @GNULIB_MBSCASESTR@
+/* Find the first occurrence of the character string NEEDLE in the character
+ string HAYSTACK, using case-insensitive comparison.
+ Note: This function may, in multibyte locales, return success even if
+ strlen (haystack) < strlen (needle) !
+ Unlike strcasestr(), this function works correctly in multibyte locales. */
+extern char * mbscasestr (const char *haystack, const char *needle);
+#endif
+
+#if @GNULIB_MBSCSPN@
+/* Find the first occurrence in the character string STRING of any character
+ in the character string ACCEPT. Return the number of bytes from the
+ beginning of the string to this occurrence, or to the end of the string
+ if none exists.
+ Unlike strcspn(), this function works correctly in multibyte locales. */
+extern size_t mbscspn (const char *string, const char *accept);
+#endif
+
+#if @GNULIB_MBSPBRK@
+/* Find the first occurrence in the character string STRING of any character
+ in the character string ACCEPT. Return the pointer to it, or NULL if none
+ exists.
+ Unlike strpbrk(), this function works correctly in multibyte locales. */
+# define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */
+extern char * mbspbrk (const char *string, const char *accept);
+#endif
+
+#if @GNULIB_MBSSPN@
+/* Find the first occurrence in the character string STRING of any character
+ not in the character string REJECT. Return the number of bytes from the
+ beginning of the string to this occurrence, or to the end of the string
+ if none exists.
+ Unlike strspn(), this function works correctly in multibyte locales. */
+extern size_t mbsspn (const char *string, const char *reject);
+#endif
+
+#if @GNULIB_MBSSEP@
+/* Search the next delimiter (multibyte character listed in the character
+ string DELIM) starting at the character string *STRINGP.
+ If one is found, overwrite it with a NUL, and advance *STRINGP to point
+ to the next multibyte character after it. Otherwise, set *STRINGP to NULL.
+ If *STRINGP was already NULL, nothing happens.
+ Return the old value of *STRINGP.
+
+ This is a variant of mbstok_r() that supports empty fields.
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+
+ See also mbstok_r(). */
+extern char * mbssep (char **stringp, const char *delim);
+#endif
+
+#if @GNULIB_MBSTOK_R@
+/* Parse the character string STRING into tokens separated by characters in
+ the character string DELIM.
+ If STRING is NULL, the saved pointer in SAVE_PTR is used as
+ the next starting point. For example:
+ char s[] = "-abc-=-def";
+ char *sp;
+ x = mbstok_r(s, "-", &sp); // x = "abc", sp = "=-def"
+ x = mbstok_r(NULL, "-=", &sp); // x = "def", sp = NULL
+ x = mbstok_r(NULL, "=", &sp); // x = NULL
+ // s = "abc\0-def\0"
+
+ Caveat: It modifies the original string.
+ Caveat: These functions cannot be used on constant strings.
+ Caveat: The identity of the delimiting character is lost.
+
+ See also mbssep(). */
+extern char * mbstok_r (char *string, const char *delim, char **save_ptr);
+#endif
+
+/* Map any int, typically from errno, into an error message. */
+#if @GNULIB_STRERROR@
+# if @REPLACE_STRERROR@
+# undef strerror
+# define strerror rpl_strerror
+extern char *strerror (int);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror
+# define strerror(e) \
+ (GL_LINK_WARNING ("strerror is unportable - " \
+ "use gnulib module strerror to guarantee non-NULL result"), \
+ strerror (e))
+#endif
+
+#if @GNULIB_STRSIGNAL@
+# if @REPLACE_STRSIGNAL@
+# define strsignal rpl_strsignal
+# endif
+# if ! @HAVE_DECL_STRSIGNAL@ || @REPLACE_STRSIGNAL@
+extern char *strsignal (int __sig);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strsignal
+# define strsignal(a) \
+ (GL_LINK_WARNING ("strsignal is unportable - " \
+ "use gnulib module strsignal for portability"), \
+ strsignal (a))
+#endif
+
+#if @GNULIB_STRVERSCMP@
+# if !@HAVE_STRVERSCMP@
+extern int strverscmp (const char *, const char *);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strverscmp
+# define strverscmp(a, b) \
+ (GL_LINK_WARNING ("strverscmp is unportable - " \
+ "use gnulib module strverscmp for portability"), \
+ strverscmp (a, b))
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _GL_STRING_H */
+#endif /* _GL_STRING_H */