X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fstring.in.h;h=d88e8a73e65f15d61143ae8d75d18248af016026;hb=35dda7458879acb367f2cba0aaf7856cd98f5b63;hp=09205e7f0c470cb1925b49e9d34bf6a924234ee5;hpb=fc068cf4eb6814e848e4dc54e1c5cf4c30a79a6f;p=gnulib.git

diff --git a/lib/string.in.h b/lib/string.in.h
index 09205e7f0..d88e8a73e 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <string.h>.
 
-   Copyright (C) 1995-1996, 2001-2007 Free Software Foundation, Inc.
+   Copyright (C) 1995-1996, 2001-2008 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -25,6 +25,18 @@
 #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.  */
 
 
@@ -40,13 +52,15 @@ extern "C" {
 # endif
 # if ! @HAVE_DECL_MEMMEM@ || @REPLACE_MEMMEM@
 extern void *memmem (void const *__haystack, size_t __haystack_len,
-		     void const *__needle, size_t __needle_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 - " \
-                      "use gnulib module memmem for portability"), \
+    (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
 
@@ -68,7 +82,8 @@ extern void *mempcpy (void *restrict __dest, void const *restrict __src,
 /* 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);
+extern void *memrchr (void const *, int, size_t)
+  __attribute__ ((__pure__));
 # endif
 #elif defined GNULIB_POSIXCHECK
 # undef memrchr
@@ -121,7 +136,8 @@ extern char *stpncpy (char *restrict __dst, char const *restrict __src,
 /* 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);
+extern char *strchrnul (char const *__s, int __c_in)
+  __attribute__ ((__pure__));
 # endif
 #elif defined GNULIB_POSIXCHECK
 # undef strchrnul
@@ -166,7 +182,8 @@ extern char *strndup (char const *__string, size_t __n);
    return MAXLEN.  */
 #if @GNULIB_STRNLEN@
 # if ! @HAVE_DECL_STRNLEN@
-extern size_t strnlen (char const *__string, size_t __maxlen);
+extern size_t strnlen (char const *__string, size_t __maxlen)
+  __attribute__ ((__pure__));
 # endif
 #elif defined GNULIB_POSIXCHECK
 # undef strnlen
@@ -192,7 +209,8 @@ extern size_t strnlen (char const *__string, size_t __maxlen);
 /* 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);
+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.
@@ -272,25 +290,38 @@ extern char *strsep (char **restrict __stringp, char const *restrict __delim);
      strsep (s, d))
 #endif
 
-#if defined GNULIB_POSIXCHECK
+#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 cannot work correctly on character strings " \
-                      "in most multibyte locales - " \
-                      "use mbsstr if you care about internationalization"), \
+    (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 ! @HAVE_STRCASESTR@
-extern char *strcasestr (const char *haystack, const char *needle);
-#endif
-#if defined GNULIB_POSIXCHECK
+#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.  */
@@ -514,6 +545,21 @@ extern char *strerror (int);
      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
+
 
 #ifdef __cplusplus
 }