Added public functions "caml_array_length" and "caml_is_double_array"

to abstract (slightly) over the concrete representation of arrays.
Contributed by F. Le Fessant.


git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@11006 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

byterun/array.c

@@ -21,6 +21,17 @@
 #include "misc.h"
 #include "mlvalues.h"
 
+CAMLexport mlsize_t caml_array_length(value array){
+  tag_t tag = Tag_val(array);
+  if (tag == Double_array_tag)
+    return Wosize_val(array) / Double_wosize;
+  else return Wosize_val(array);
+}
+
+CAMLexport int caml_is_double_array(value array){
+  return (Tag_val(array) == Double_array_tag);
+}
+
 CAMLprim value caml_array_get_addr(value array, value index)
 {
   intnat idx = Long_val(index);

byterun/mlvalues.h

@@ -245,6 +245,9 @@ CAMLextern void caml_Store_double_val (value,double);
   double caml__temp_d = (d); \
   Store_double_val((value)((double *) (v) + caml__temp_i), caml__temp_d); \
 }while(0)
+CAMLextern mlsize_t caml_array_length (value);   /* size in items */
+CAMLextern int caml_is_double_array (value);   /* 0 is false, 1 is true */
+
 
 /* Custom blocks.  They contain a pointer to a "method suite"
    of functions (for finalization, comparison, hashing, etc)