Re-implemented Float#to_eet_chunks in C.

[ruby-eet.git] / ext / ext.c

diff --git a/ext/ext.c b/ext/ext.c
index 674220f1d968f3288f2f4fb4bae1650f2ce4ab11..465099f801f49d8efe211365e0bf6eb744faf7af 100644 (file)
--- a/ext/ext.c
+++ b/ext/ext.c
@@ -1,5 +1,5 @@
 /*
- * $Id: ext.c 54 2005-06-02 20:05:38Z tilman $
+ * $Id: ext.c 59 2005-06-08 16:13:15Z tilman $
  *
  * Copyright (c) 2005 Tilman Sauerbeck (tilman at code-monkey de)
  *
@@ -26,6 +26,7 @@
 #include <Eet.h>
 #include <ruby.h>
 #include <st.h>
+#include <locale.h>
 
 #define CHECK_KEY(key) \
        if (rb_funcall (key, id_include, 1, INT2FIX (0)) == Qtrue) \
@@ -47,7 +48,7 @@ static VALUE c_close (VALUE self);
 
 static VALUE cStream, cChunk,
              eEetError, eNameError, ePropError,
-             sym_lossy, sym_level, sym_quality;
+             sym_lossy, sym_level, sym_quality, sym_double;
 static ID id_include, id_serialize, id_push, id_keys,
           id_to_eet_chunks, id_to_eet_name, id_to_eet_properties,
           id_tag, id_data;
@@ -594,6 +595,36 @@ c_to_eet (VALUE self)
        return rb_funcall (stream, id_serialize, 0);
 }
 
+static VALUE
+float_to_eet_chunks (int argc, VALUE *argv, VALUE self)
+{
+       VALUE tag, type = Qnil, args[2], chunk;
+       char buf[65], *loc;
+       double d;
+       int len;
+
+       rb_scan_args (argc, argv, "11", &tag, &type);
+
+       d = NUM2DBL (self);
+
+       /* switch locale to make sure we get proper snprintf output */
+       loc = setlocale (LC_NUMERIC, "C");
+
+       len = snprintf (buf, sizeof (buf) - 1, "%a",
+                       type == sym_double ? d : (float) d);
+
+       if (loc)
+               setlocale (LC_NUMERIC, loc);
+
+       buf[++len] = '\0';
+
+       args[0] = tag;
+       args[1] = rb_str_new (buf, len);
+       chunk = rb_class_new_instance (2, args, cChunk);
+
+       return rb_ary_new3 (1, chunk);
+}
+
 void
 Init_eet_ext ()
 {
@@ -625,6 +656,8 @@ Init_eet_ext ()
 
        rb_define_method (rb_cObject, "to_eet", c_to_eet, 0);
 
+       rb_define_method (rb_cFloat, "to_eet_chunks", float_to_eet_chunks, -1);
+
        eEetError = rb_define_class_under (m, "EetError", rb_eStandardError);
        eNameError = rb_define_class_under (m, "NameError", eEetError);
        ePropError = rb_define_class_under (m, "PropertyError", eEetError);
@@ -641,4 +674,5 @@ Init_eet_ext ()
        sym_lossy = ID2SYM (rb_intern ("lossy"));
        sym_level = ID2SYM (rb_intern ("level"));
        sym_quality =  ID2SYM (rb_intern ("quality"));
+       sym_double = ID2SYM (rb_intern ("double"));
 }