summaryrefslogtreecommitdiff
path: root/gnulib-m4/wcwidth.m4
diff options
context:
space:
mode:
authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /gnulib-m4/wcwidth.m4
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'gnulib-m4/wcwidth.m4')
-rw-r--r--gnulib-m4/wcwidth.m485
1 files changed, 85 insertions, 0 deletions
diff --git a/gnulib-m4/wcwidth.m4 b/gnulib-m4/wcwidth.m4
new file mode 100644
index 00000000..4bedefae
--- /dev/null
+++ b/gnulib-m4/wcwidth.m4
@@ -0,0 +1,85 @@
+# wcwidth.m4 serial 14
+dnl Copyright (C) 2006-2008 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_WCWIDTH],
+[
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+ dnl Persuade glibc <wchar.h> to declare wcwidth().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_REQUIRE([gt_TYPE_WCHAR_T])
+ AC_REQUIRE([gt_TYPE_WINT_T])
+
+ AC_CHECK_HEADERS_ONCE([wchar.h])
+ AC_CHECK_FUNCS_ONCE([wcwidth])
+
+ AC_CHECK_DECLS([wcwidth], [], [], [
+/* AIX 3.2.5 declares wcwidth in <string.h>. */
+#include <string.h>
+/* 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>
+])
+ if test $ac_cv_have_decl_wcwidth != yes; then
+ HAVE_DECL_WCWIDTH=0
+ fi
+
+ if test $ac_cv_func_wcwidth = no; then
+ REPLACE_WCWIDTH=1
+ else
+ dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
+ dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
+ dnl This leads to bugs in 'ls' (coreutils).
+ AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
+ [gl_cv_func_wcwidth_works],
+ [
+ AC_TRY_RUN([
+#include <locale.h>
+/* AIX 3.2.5 declares wcwidth in <string.h>. */
+#include <string.h>
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
+ before <wchar.h>. */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
+#if !HAVE_DECL_WCWIDTH
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int wcwidth (int);
+#endif
+int main ()
+{
+ if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
+ if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0)
+ return 1;
+ return 0;
+}], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no],
+ [gl_cv_func_wcwidth_works="guessing no"])
+ ])
+ case "$gl_cv_func_wcwidth_works" in
+ *yes) ;;
+ *no) REPLACE_WCWIDTH=1 ;;
+ esac
+ fi
+ if test $REPLACE_WCWIDTH = 1; then
+ AC_LIBOBJ([wcwidth])
+ fi
+
+ if test $REPLACE_WCWIDTH = 1 || test $HAVE_DECL_WCWIDTH = 0; then
+ gl_REPLACE_WCHAR_H
+ fi
+])