New module 'wcsncasecmp'.

* modules/wcsncasecmp: New file.
* lib/wchar.in.h (wcsncasecmp): New declaration.
* lib/wcsncasecmp.c: New file.
* lib/wcsncasecmp-impl.h: New file, from libutf8 with modifications.
* m4/wcsncasecmp.m4: New file.
* m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsncasecmp is declared.
(gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNCASECMP, HAVE_WCSNCASECMP.
* modules/wchar (Makefile.am): Substitute GNULIB_WCSNCASECMP,
HAVE_WCSNCASECMP.
* tests/test-wchar-c++.cc: Test the declaration of wcsncasecmp.
* doc/posix-functions/wcsncasecmp.texi: Mention the new module.

10 files changed, 177 insertions, 33 deletions

diff --git a/ChangeLog b/ChangeLog
index e58831532c..168ba0f6b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,20 @@
 2011-02-06  Bruno Haible  <bruno@clisp.org>
 
+	New module 'wcsncasecmp'.
+	* modules/wcsncasecmp: New file.
+	* lib/wchar.in.h (wcsncasecmp): New declaration.
+	* lib/wcsncasecmp.c: New file.
+	* lib/wcsncasecmp-impl.h: New file, from libutf8 with modifications.
+	* m4/wcsncasecmp.m4: New file.
+	* m4/wchar_h.m4 (gl_WCHAR_H): Test whether wcsncasecmp is declared.
+	(gl_WCHAR_H_DEFAULTS): Initialize GNULIB_WCSNCASECMP, HAVE_WCSNCASECMP.
+	* modules/wchar (Makefile.am): Substitute GNULIB_WCSNCASECMP,
+	HAVE_WCSNCASECMP.
+	* tests/test-wchar-c++.cc: Test the declaration of wcsncasecmp.
+	* doc/posix-functions/wcsncasecmp.texi: Mention the new module.
+
+2011-02-06  Bruno Haible  <bruno@clisp.org>
+
 	New module 'wcscasecmp'.
 	* modules/wcscasecmp: New file.
 	* lib/wchar.in.h (wcscasecmp): New declaration.
diff --git a/doc/posix-functions/wcsncasecmp.texi b/doc/posix-functions/wcsncasecmp.texi
index cfc5f76f8f..0c841b5e78 100644
--- a/doc/posix-functions/wcsncasecmp.texi
+++ b/doc/posix-functions/wcsncasecmp.texi
@@ -4,19 +4,19 @@
 
 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/wcsncasecmp.html}
 
-Gnulib module: ---
+Gnulib module: wcsncasecmp
 
 Portability problems fixed by Gnulib:
 @itemize
+@item
+This function is missing on some platforms:
+MacOS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 4.3.2, HP-UX 11,
+IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, BeOS.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
 @item
-This function is missing on some platforms:
-MacOS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 4.3.2, HP-UX
-11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x, mingw, BeOS.
-@item
 On AIX and Windows platforms, @code{wchar_t} is a 16-bit type and therefore cannot
 accommodate all Unicode characters.
 @end itemize
diff --git a/lib/wchar.in.h b/lib/wchar.in.h
index d9d023aabd..43a54d5ef9 100644
--- a/lib/wchar.in.h
+++ b/lib/wchar.in.h
@@ -702,6 +702,24 @@ _GL_WARN_ON_USE (wcscasecmp, "wcscasecmp is unportable - "
 #endif
 
 
+/* Compare no more than N chars of S1 and S2, ignoring case.  */
+#if @GNULIB_WCSNCASECMP@
+# if !@HAVE_WCSNCASECMP@
+_GL_FUNCDECL_SYS (wcsncasecmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n));
+# endif
+_GL_CXXALIAS_SYS (wcsncasecmp, int,
+                  (const wchar_t *s1, const wchar_t *s2, size_t n));
+_GL_CXXALIASWARN (wcsncasecmp);
+#elif defined GNULIB_POSIXCHECK
+# undef wcsncasecmp
+# if HAVE_RAW_DECL_WCSNCASECMP
+_GL_WARN_ON_USE (wcsncasecmp, "wcsncasecmp is unportable - "
+                 "use gnulib module wcsncasecmp for portability");
+# endif
+#endif
+
+
 #endif /* _GL_WCHAR_H */
 #endif /* _GL_WCHAR_H */
 #endif
diff --git a/lib/wcsncasecmp-impl.h b/lib/wcsncasecmp-impl.h
new file mode 100644
index 0000000000..234f27a770
--- /dev/null
+++ b/lib/wcsncasecmp-impl.h
@@ -0,0 +1,36 @@
+/* Compare two wide strings ignoring case.
+   Copyright (C) 1999, 2011 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   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
+   the Free Software Foundation; either version 3 of the License, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+int
+wcsncasecmp (const wchar_t *s1, const wchar_t *s2, size_t n)
+{
+  for (; n > 0;)
+    {
+      wchar_t wc1 = towlower (*s1++);
+      wchar_t wc2 = towlower (*s2++);
+      if (wc1 != (wchar_t)'\0' && wc1 == wc2)
+        {
+          n--;
+          continue;
+        }
+      /* Note that wc1 and wc2 each have at most 31 bits.  */
+      return (int)wc1 - (int)wc2;
+             /* > 0 if wc1 > wc2, < 0 if wc1 < wc2,
+                = 0 if wc1 and wc2 are both '\0'.  */
+    }
+  return 0;
+}
diff --git a/lib/wcsncasecmp.c b/lib/wcsncasecmp.c
new file mode 100644
index 0000000000..d2fafdd23f
--- /dev/null
+++ b/lib/wcsncasecmp.c
@@ -0,0 +1,25 @@
+/* Compare two wide strings ignoring case.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2011.
+
+   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
+   the Free Software Foundation; either version 3 of the License, 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <wchar.h>
+
+#include <wctype.h>
+
+#include "wcsncasecmp-impl.h"
diff --git a/m4/wchar_h.m4 b/m4/wchar_h.m4
index 578134c234..a06c0a4139 100644
--- a/m4/wchar_h.m4
+++ b/m4/wchar_h.m4
@@ -52,7 +52,7 @@ AC_DEFUN([gl_WCHAR_H],
     [btowc wctob mbsinit mbrtowc mbrlen mbsrtowcs mbsnrtowcs wcrtomb
      wcsrtombs wcsnrtombs wcwidth wmemchr wmemcmp wmemcpy wmemmove wmemset
      wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat wcscmp
-     wcsncmp wcscasecmp
+     wcsncmp wcscasecmp wcsncasecmp
     ])
 ])
 
@@ -136,33 +136,34 @@ AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
 
 AC_DEFUN([gl_WCHAR_H_DEFAULTS],
 [
-  GNULIB_BTOWC=0;      AC_SUBST([GNULIB_BTOWC])
-  GNULIB_WCTOB=0;      AC_SUBST([GNULIB_WCTOB])
-  GNULIB_MBSINIT=0;    AC_SUBST([GNULIB_MBSINIT])
-  GNULIB_MBRTOWC=0;    AC_SUBST([GNULIB_MBRTOWC])
-  GNULIB_MBRLEN=0;     AC_SUBST([GNULIB_MBRLEN])
-  GNULIB_MBSRTOWCS=0;  AC_SUBST([GNULIB_MBSRTOWCS])
-  GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
-  GNULIB_WCRTOMB=0;    AC_SUBST([GNULIB_WCRTOMB])
-  GNULIB_WCSRTOMBS=0;  AC_SUBST([GNULIB_WCSRTOMBS])
-  GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
-  GNULIB_WCWIDTH=0;    AC_SUBST([GNULIB_WCWIDTH])
-  GNULIB_WMEMCHR=0;    AC_SUBST([GNULIB_WMEMCHR])
-  GNULIB_WMEMCMP=0;    AC_SUBST([GNULIB_WMEMCMP])
-  GNULIB_WMEMCPY=0;    AC_SUBST([GNULIB_WMEMCPY])
-  GNULIB_WMEMMOVE=0;   AC_SUBST([GNULIB_WMEMMOVE])
-  GNULIB_WMEMSET=0;    AC_SUBST([GNULIB_WMEMSET])
-  GNULIB_WCSLEN=0;     AC_SUBST([GNULIB_WCSLEN])
-  GNULIB_WCSNLEN=0;    AC_SUBST([GNULIB_WCSNLEN])
-  GNULIB_WCSCPY=0;     AC_SUBST([GNULIB_WCSCPY])
-  GNULIB_WCPCPY=0;     AC_SUBST([GNULIB_WCPCPY])
-  GNULIB_WCSNCPY=0;    AC_SUBST([GNULIB_WCSNCPY])
-  GNULIB_WCPNCPY=0;    AC_SUBST([GNULIB_WCPNCPY])
-  GNULIB_WCSCAT=0;     AC_SUBST([GNULIB_WCSCAT])
-  GNULIB_WCSNCAT=0;    AC_SUBST([GNULIB_WCSNCAT])
-  GNULIB_WCSCMP=0;     AC_SUBST([GNULIB_WCSCMP])
-  GNULIB_WCSNCMP=0;    AC_SUBST([GNULIB_WCSNCMP])
-  GNULIB_WCSCASECMP=0; AC_SUBST([GNULIB_WCSCASECMP])
+  GNULIB_BTOWC=0;       AC_SUBST([GNULIB_BTOWC])
+  GNULIB_WCTOB=0;       AC_SUBST([GNULIB_WCTOB])
+  GNULIB_MBSINIT=0;     AC_SUBST([GNULIB_MBSINIT])
+  GNULIB_MBRTOWC=0;     AC_SUBST([GNULIB_MBRTOWC])
+  GNULIB_MBRLEN=0;      AC_SUBST([GNULIB_MBRLEN])
+  GNULIB_MBSRTOWCS=0;   AC_SUBST([GNULIB_MBSRTOWCS])
+  GNULIB_MBSNRTOWCS=0;  AC_SUBST([GNULIB_MBSNRTOWCS])
+  GNULIB_WCRTOMB=0;     AC_SUBST([GNULIB_WCRTOMB])
+  GNULIB_WCSRTOMBS=0;   AC_SUBST([GNULIB_WCSRTOMBS])
+  GNULIB_WCSNRTOMBS=0;  AC_SUBST([GNULIB_WCSNRTOMBS])
+  GNULIB_WCWIDTH=0;     AC_SUBST([GNULIB_WCWIDTH])
+  GNULIB_WMEMCHR=0;     AC_SUBST([GNULIB_WMEMCHR])
+  GNULIB_WMEMCMP=0;     AC_SUBST([GNULIB_WMEMCMP])
+  GNULIB_WMEMCPY=0;     AC_SUBST([GNULIB_WMEMCPY])
+  GNULIB_WMEMMOVE=0;    AC_SUBST([GNULIB_WMEMMOVE])
+  GNULIB_WMEMSET=0;     AC_SUBST([GNULIB_WMEMSET])
+  GNULIB_WCSLEN=0;      AC_SUBST([GNULIB_WCSLEN])
+  GNULIB_WCSNLEN=0;     AC_SUBST([GNULIB_WCSNLEN])
+  GNULIB_WCSCPY=0;      AC_SUBST([GNULIB_WCSCPY])
+  GNULIB_WCPCPY=0;      AC_SUBST([GNULIB_WCPCPY])
+  GNULIB_WCSNCPY=0;     AC_SUBST([GNULIB_WCSNCPY])
+  GNULIB_WCPNCPY=0;     AC_SUBST([GNULIB_WCPNCPY])
+  GNULIB_WCSCAT=0;      AC_SUBST([GNULIB_WCSCAT])
+  GNULIB_WCSNCAT=0;     AC_SUBST([GNULIB_WCSNCAT])
+  GNULIB_WCSCMP=0;      AC_SUBST([GNULIB_WCSCMP])
+  GNULIB_WCSNCMP=0;     AC_SUBST([GNULIB_WCSNCMP])
+  GNULIB_WCSCASECMP=0;  AC_SUBST([GNULIB_WCSCASECMP])
+  GNULIB_WCSNCASECMP=0; AC_SUBST([GNULIB_WCSNCASECMP])
   dnl Assume proper GNU behavior unless another module says otherwise.
   HAVE_BTOWC=1;         AC_SUBST([HAVE_BTOWC])
   HAVE_MBSINIT=1;       AC_SUBST([HAVE_MBSINIT])
@@ -189,6 +190,7 @@ AC_DEFUN([gl_WCHAR_H_DEFAULTS],
   HAVE_WCSCMP=1;        AC_SUBST([HAVE_WCSCMP])
   HAVE_WCSNCMP=1;       AC_SUBST([HAVE_WCSNCMP])
   HAVE_WCSCASECMP=1;    AC_SUBST([HAVE_WCSCASECMP])
+  HAVE_WCSNCASECMP=1;   AC_SUBST([HAVE_WCSNCASECMP])
   HAVE_DECL_WCTOB=1;    AC_SUBST([HAVE_DECL_WCTOB])
   HAVE_DECL_WCWIDTH=1;  AC_SUBST([HAVE_DECL_WCWIDTH])
   REPLACE_MBSTATE_T=0;  AC_SUBST([REPLACE_MBSTATE_T])
diff --git a/m4/wcsncasecmp.m4 b/m4/wcsncasecmp.m4
new file mode 100644
index 0000000000..a7c468284e
--- /dev/null
+++ b/m4/wcsncasecmp.m4
@@ -0,0 +1,15 @@
+# wcsncasecmp.m4 serial 1
+dnl Copyright (C) 2011 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_WCSNCASECMP],
+[
+  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([wcsncasecmp])
+  if test $ac_cv_func_wcsncasecmp = no; then
+    HAVE_WCSNCASECMP=0
+    AC_LIBOBJ([wcsncasecmp])
+  fi
+])
diff --git a/modules/wchar b/modules/wchar
index 81861ce9ce..de85535a09 100644
--- a/modules/wchar
+++ b/modules/wchar
@@ -57,6 +57,7 @@ wchar.h: wchar.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	      -e 's|@''GNULIB_WCSCMP''@|$(GNULIB_WCSCMP)|g' \
 	      -e 's|@''GNULIB_WCSNCMP''@|$(GNULIB_WCSNCMP)|g' \
 	      -e 's|@''GNULIB_WCSCASECMP''@|$(GNULIB_WCSCASECMP)|g' \
+	      -e 's|@''GNULIB_WCSNCASECMP''@|$(GNULIB_WCSNCASECMP)|g' \
 	      -e 's|@''HAVE_WINT_T''@|$(HAVE_WINT_T)|g' \
 	      -e 's|@''HAVE_BTOWC''@|$(HAVE_BTOWC)|g' \
 	      -e 's|@''HAVE_MBSINIT''@|$(HAVE_MBSINIT)|g' \
@@ -83,6 +84,7 @@ wchar.h: wchar.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	      -e 's|@''HAVE_WCSCMP''@|$(HAVE_WCSCMP)|g' \
 	      -e 's|@''HAVE_WCSNCMP''@|$(HAVE_WCSNCMP)|g' \
 	      -e 's|@''HAVE_WCSCASECMP''@|$(HAVE_WCSCASECMP)|g' \
+	      -e 's|@''HAVE_WCSNCASECMP''@|$(HAVE_WCSNCASECMP)|g' \
 	      -e 's|@''HAVE_DECL_WCTOB''@|$(HAVE_DECL_WCTOB)|g' \
 	      -e 's|@''HAVE_DECL_WCWIDTH''@|$(HAVE_DECL_WCWIDTH)|g' \
 	      -e 's|@''REPLACE_MBSTATE_T''@|$(REPLACE_MBSTATE_T)|g' \
diff --git a/modules/wcsncasecmp b/modules/wcsncasecmp
new file mode 100644
index 0000000000..8f4e1ad4ae
--- /dev/null
+++ b/modules/wcsncasecmp
@@ -0,0 +1,26 @@
+Description:
+wcsncasecmp() function: compare two wide strings ignoring case.
+
+Files:
+lib/wcsncasecmp.c
+lib/wcsncasecmp-impl.h
+m4/wcsncasecmp.m4
+
+Depends-on:
+wchar
+wctype
+
+configure.ac:
+gl_FUNC_WCSNCASECMP
+gl_WCHAR_MODULE_INDICATOR([wcsncasecmp])
+
+Makefile.am:
+
+Include:
+<wchar.h>
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible
diff --git a/tests/test-wchar-c++.cc b/tests/test-wchar-c++.cc
index 58521353c2..842c28d80a 100644
--- a/tests/test-wchar-c++.cc
+++ b/tests/test-wchar-c++.cc
@@ -153,6 +153,11 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::wcscasecmp, int,
                  (const wchar_t *, const wchar_t *));
 #endif
 
+#if GNULIB_TEST_WCSNCASECMP
+SIGNATURE_CHECK (GNULIB_NAMESPACE::wcsncasecmp, int,
+                 (const wchar_t *, const wchar_t *, size_t));
+#endif
+
 
 int
 main ()