Support for Unicode general categories

* libguile/chars.c, libguile/chars.h (scm_char_general_category): New function.
* test-suite/tests/chars.test: Unit tests for `char-general-category'.
* doc/ref/api-data.texi (Characters): Documentation for
  `char-general-category'.

1 files changed, 20 insertions, 0 deletions

diff --git a/libguile/chars.c b/libguile/chars.c
index 1c4d10609..16a2b90d6 100644
--- a/libguile/chars.c
+++ b/libguile/chars.c
@@ -25,6 +25,7 @@
 #include <ctype.h>
 #include <limits.h>
 #include <unicase.h>
+#include <unictype.h>
 
 #include "libguile/_scm.h"
 #include "libguile/validate.h"
@@ -467,6 +468,25 @@ SCM_DEFINE (scm_char_titlecase, "char-titlecase", 1, 0, 0,
 }
 #undef FUNC_NAME
 
+SCM_DEFINE (scm_char_general_category, "char-general-category", 1, 0, 0,
+           (SCM chr),
+            "Return a symbol representing the Unicode general category of "
+            "@var{chr} or @code{#f} if a named category cannot be found.")
+#define FUNC_NAME s_scm_char_general_category
+{
+  const char *sym;
+  uc_general_category_t cat;
+
+  SCM_VALIDATE_CHAR (1, chr);
+  cat = uc_general_category (SCM_CHAR (chr));
+  sym = uc_general_category_name (cat);
+
+  if (sym != NULL)
+    return scm_from_locale_symbol (sym);
+  return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+