Add (ice-9 unicode) module

* libguile/unicode.c:
* libguile/unicode.h:
* test-suite/tests/unicode.test:
* module/ice-9/unicode.scm: New files.

* module/Makefile.am:
* libguile/Makefile.am:
* test-suite/Makefile.am:
* libguile/init.c: Wire new files into the build.

* doc/ref/api-data.texi: Add docs.

libguile/unicode.c

@@ -0,0 +1,95 @@
+/* Copyright (C) 2014 Free Software Foundation, Inc.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <limits.h>
+#include <unicase.h>
+#include <unictype.h>
+#include <uniname.h>
+
+#include "libguile/_scm.h"
+#include "libguile/validate.h"
+
+#include "libguile/unicode.h"
+
+
+
+SCM_DEFINE (scm_char_to_formal_name, "char->formal-name", 1, 0, 0, 
+            (SCM ch),
+	    "Return the formal all-upper-case unicode name of @var{ch},\n"
+            "as a string.  If the character has no name, return @code{#f}.")
+#define FUNC_NAME s_scm_char_to_formal_name
+{
+  char buf[UNINAME_MAX + 1];
+
+  SCM_VALIDATE_CHAR (1, ch);
+
+  memset(buf, 0, UNINAME_MAX + 1);
+
+  if (unicode_character_name (SCM_CHAR (ch), buf))
+    return scm_from_latin1_string (buf);
+
+  return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_formal_name_to_char, "formal-name->char", 1, 0, 0, 
+            (SCM name),
+	    "Return the character whose formal all-upper-case unicode name is\n"
+            "@var{name}, or @code{#f} if no such character is known.")
+#define FUNC_NAME s_scm_formal_name_to_char
+{
+  char *c_name;
+  scm_t_wchar ret;
+  
+  SCM_VALIDATE_STRING (1, name);
+
+  c_name = scm_to_latin1_string (name);
+  ret = unicode_name_character (c_name);
+  free (c_name);
+
+  return ret == UNINAME_INVALID ? SCM_BOOL_F : SCM_MAKE_CHAR (ret);
+}
+#undef FUNC_NAME
+
+static void
+scm_load_unicode (void)
+{
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/unicode.x"
+#endif
+}
+
+void
+scm_init_unicode (void)
+{
+  scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION,
+                            "scm_init_unicode",
+                            (scm_t_extension_init_func)scm_load_unicode,
+                            NULL);
+}
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/