#ifndef _gl_WCWIDTH_H
#define _gl_WCWIDTH_H
+#if HAVE_WCHAR_T
+
/* Get wcwidth if available, along with wchar_t. */
-#if HAVE_WCHAR_H
+# if HAVE_WCHAR_H
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
<wchar.h>. */
-# include <stdio.h>
-# include <time.h>
-# include <wchar.h>
-#endif
+# include <stdio.h>
+# include <time.h>
+# include <wchar.h>
+# endif
/* Get iswprint. */
-#if HAVE_WCTYPE_H
-# include <wctype.h>
-#endif
-#if !defined iswprint && !HAVE_ISWPRINT
-# define iswprint(wc) 1
-#endif
+# if HAVE_WCTYPE_H
+# include <wctype.h>
+# endif
+# if !defined iswprint && !HAVE_ISWPRINT
+static inline int
+# if HAVE_WINT_T
+iswprint (wint_t wc)
+# else
+iswprint (int wc)
+# endif
+{
+ return (wc >= 0 && wc < 128
+ ? wc >= ' ' && wc <= '~'
+ : 1);
+}
+# define iswprint iswprint
+# endif
-#if !defined wcwidth && !HAVE_WCWIDTH
+# ifndef HAVE_DECL_WCWIDTH
+"this configure-time declaration test was not run"
+# endif
+# ifndef wcwidth
+# if !HAVE_WCWIDTH
/* wcwidth doesn't exist, so assume all printable characters have
width 1. */
return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
}
-#endif
+# elif !HAVE_DECL_WCWIDTH
+
+/* wcwidth exists but is not declared. */
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int /* actually wchar_t */);
+
+# endif
+# endif
+
+#endif /* HAVE_WCHAR_H */
#endif /* _gl_WCWIDTH_H */