wctype-h: ensure wctype_t and wctrans_t types

[Bruno Haible]

On some platforms, the functions wctype and iswctype and the type wctype_t
are missing. Likewise for the functions wctrans and towctrans and the type
wctrans_t. Let's detect it and define the types:


2011-02-06  Bruno Haible  <address@hidden>

        wctype-h: Ensure wctype_t and wctrans_t are defined.
        * lib/wctype.in.h (wctype_t, wctrans_t): New type declarations.
        * m4/wctype_h.m4 (gl_WCTYPE_H): Determine HAVE_WCTYPE_T, HAVE_WCTRANS_T.
        (gl_WCTYPE_H_DEFAULTS): Initialize HAVE_WCTYPE_T, HAVE_WCTRANS_T.
        * modules/wctype-h (Makefile.am): Substitute HAVE_WCTYPE_T,
        HAVE_WCTRANS_T.
        * tests/test-wctype-h.c: Check that wctype_t and wctrans_t are defined.

--- lib/wctype.in.h.orig        Sun Feb  6 23:12:21 2011
+++ lib/wctype.in.h     Sun Feb  6 23:08:28 2011
@@ -372,6 +372,10 @@
 _GL_CXXALIASWARN (iswblank);
 #endif
 
+#if address@hidden@
+typedef void * wctype_t;
+#endif
+
 #if @REPLACE_ISWCNTRL@ || defined __MINGW32__
 _GL_CXXALIAS_RPL (towlower, wint_t, (wint_t wc));
 _GL_CXXALIAS_RPL (towupper, wint_t, (wint_t wc));
@@ -382,6 +386,10 @@
 _GL_CXXALIASWARN (towlower);
 _GL_CXXALIASWARN (towupper);
 
+#if address@hidden@
+typedef void * wctrans_t;
+#endif
+
 
 #endif /* _GL_WCTYPE_H */
 #endif /* _GL_WCTYPE_H */
--- m4/wctype_h.m4.orig Sun Feb  6 23:12:21 2011
+++ m4/wctype_h.m4      Sun Feb  6 23:07:24 2011
@@ -1,4 +1,4 @@
-# wctype_h.m4 serial 13
+# wctype_h.m4 serial 14
 
 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
 
@@ -78,6 +78,54 @@
     dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
     :
   fi
+
+  dnl We assume that the wctype() and iswctype() functions exist if and only
+  dnl if the type wctype_t is defined in <wctype.h>.
+  AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
+               included before <wchar.h>.
+               BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
+               must be included before <wchar.h>.  */
+            #include <stddef.h>
+            #include <stdio.h>
+            #include <time.h>
+            #include <wchar.h>
+            #include <wctype.h>
+            wctype_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctype_t=yes],
+       [gl_cv_type_wctype_t=no])
+    ])
+  if test $gl_cv_type_wctype_t = no; then
+    HAVE_WCTYPE_T=0
+  fi
+
+  dnl We assume that the wctrans() and towctrans() functions exist if and only
+  dnl if the type wctrans_t is defined in <wctype.h>.
+  AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t],
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
+               included before <wchar.h>.
+               BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
+               must be included before <wchar.h>.  */
+            #include <stddef.h>
+            #include <stdio.h>
+            #include <time.h>
+            #include <wchar.h>
+            #include <wctype.h>
+            wctrans_t a;
+          ]],
+          [[]])],
+       [gl_cv_type_wctrans_t=yes],
+       [gl_cv_type_wctrans_t=no])
+    ])
+  if test $gl_cv_type_wctrans_t = no; then
+    HAVE_WCTRANS_T=0
+  fi
 ])
 
 AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
@@ -94,5 +142,7 @@
   GNULIB_ISWBLANK=0;    AC_SUBST([GNULIB_ISWBLANK])
   dnl Assume proper GNU behavior unless another module says otherwise.
   HAVE_ISWBLANK=1;      AC_SUBST([HAVE_ISWBLANK])
+  HAVE_WCTYPE_T=1;      AC_SUBST([HAVE_WCTYPE_T])
+  HAVE_WCTRANS_T=1;     AC_SUBST([HAVE_WCTRANS_T])
   REPLACE_ISWBLANK=0;   AC_SUBST([REPLACE_ISWBLANK])
 ])
--- modules/wctype-h.orig       Sun Feb  6 23:12:22 2011
+++ modules/wctype-h    Sun Feb  6 23:11:51 2011
@@ -30,6 +30,8 @@
              -e 's/@''GNULIB_ISWBLANK''@/$(GNULIB_ISWBLANK)/g' \
              -e 's/@''HAVE_ISWBLANK''@/$(HAVE_ISWBLANK)/g' \
              -e 's/@''HAVE_ISWCNTRL''@/$(HAVE_ISWCNTRL)/g' \
+             -e 's/@''HAVE_WCTYPE_T''@/$(HAVE_WCTYPE_T)/g' \
+             -e 's/@''HAVE_WCTRANS_T''@/$(HAVE_WCTRANS_T)/g' \
              -e 's/@''HAVE_WINT_T''@/$(HAVE_WINT_T)/g' \
              -e 's/@''REPLACE_ISWBLANK''@/$(REPLACE_ISWBLANK)/g' \
              -e 's/@''REPLACE_ISWCNTRL''@/$(REPLACE_ISWCNTRL)/g' \
--- tests/test-wctype-h.c.orig  Sun Feb  6 23:12:22 2011
+++ tests/test-wctype-h.c       Sun Feb  6 23:09:30 2011
@@ -27,6 +27,12 @@
 /* Check that WEOF is defined.  */
 wint_t e = WEOF;
 
+/* Check that the type wctype_t is defined.  */
+wctype_t p;
+
+/* Check that the type wctrans_t is defined.  */
+wctrans_t q;
+
 int
 main (void)
 {

-- 
In memoriam Chris Gueffroy <http://en.wikipedia.org/wiki/Chris_Gueffroy>