From 8f21d4026e8f338245812d6edfd113c05282e321 Mon Sep 17 00:00:00 2001
From: Patrik Nyblom <pan@erlang.org>
Date: Fri, 30 Apr 2010 11:52:38 +0200
Subject: Add referenced_byte_size/1

Add testcases for referenced_byte_size/1.

Add failure tests for referenced_byte_size.
---
 erts/emulator/beam/bif.tab          |  2 +-
 erts/emulator/beam/erl_bif_binary.c | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)

(limited to 'erts/emulator/beam')

diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index bd908566ee..7978044fe5 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -778,7 +778,7 @@ bif binary:bin_to_list/3
 bif binary:list_to_bin/1
 bif binary:copy/1
 bif binary:copy/2
-#  bif binary:referenced_byte_size/1
+bif binary:referenced_byte_size/1
 #  bif binary:decode_unsigned/1
 #  bif binary:decode_unsigned/2
 
diff --git a/erts/emulator/beam/erl_bif_binary.c b/erts/emulator/beam/erl_bif_binary.c
index e2d3d00db2..b3ebc95cea 100644
--- a/erts/emulator/beam/erl_bif_binary.c
+++ b/erts/emulator/beam/erl_bif_binary.c
@@ -2418,6 +2418,29 @@ BIF_RETTYPE binary_copy_2(BIF_ALIST_2)
     return do_binary_copy(BIF_P,BIF_ARG_1,BIF_ARG_2);
 }
 
+BIF_RETTYPE binary_referenced_byte_size_1(BIF_ALIST_1)
+{
+    ErlSubBin *sb;
+    ProcBin *pb;
+    Eterm res;
+    Eterm bin = BIF_ARG_1;
+
+    if (is_not_binary(BIF_ARG_1)) {
+	BIF_ERROR(BIF_P,BADARG);
+    }
+    sb = (ErlSubBin *) binary_val(bin);
+    if (sb->thing_word == HEADER_SUB_BIN) {
+	bin = sb->orig;
+    }
+    pb = (ProcBin *) binary_val(bin);
+    if (pb->thing_word == HEADER_PROC_BIN) {
+	res = erts_make_integer((Uint) pb->val->orig_size, BIF_P); /* XXX:PaN Halfword? orig_size is a long */
+    } else { /* heap binary */
+	res = erts_make_integer((Uint) ((ErlHeapBin *) pb)->size, BIF_P);
+    }
+    BIF_RET(res);
+}
+
 /*
  * Hard debug functions (dump) for the search structures
  */
-- 
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