From 7dae40dd0d595776eec7c0407a7849962650e762 Mon Sep 17 00:00:00 2001
From: Kostis Sagonas <kostis@it.uu.se>
Date: Sun, 12 Jan 2014 20:10:49 +0100
Subject: Add tests for the HiPE compiler (Part 1: binaries and bitstrings)

Create tests for the HiPE native code compiler. This is the first
part of the effort and contains tests that check that the native
code produced by the HiPE compiler for binaries and bitstrings is
OK and behaves similarly to the code produced by the BEAM compiler.
---
 lib/hipe/test/bs_SUITE_data/bs_id3.erl | 75 ++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 lib/hipe/test/bs_SUITE_data/bs_id3.erl

(limited to 'lib/hipe/test/bs_SUITE_data/bs_id3.erl')

diff --git a/lib/hipe/test/bs_SUITE_data/bs_id3.erl b/lib/hipe/test/bs_SUITE_data/bs_id3.erl
new file mode 100644
index 0000000000..a6152f05cd
--- /dev/null
+++ b/lib/hipe/test/bs_SUITE_data/bs_id3.erl
@@ -0,0 +1,75 @@
+%% -*- erlang-indent-level: 2 -*-
+%%==========================================================================
+%% From: Tomas Stejskal -- 23/02/2008
+%% I've found some strange behavior regarding binary matching. The module's
+%% purpose is reading an id3 version 1 or version 1.1 tag from an mp3 bin.
+%% When I use the function read_v1_or_v11_tag on a mp3 binary containing
+%% version 1 tag, it returns an error. However, when the function
+%% read_only_v1_tag is applied on the same file, it reads the tag data
+%% correctly. The only difference between these two functions is that the
+%% former has an extra branch to read version 1.1 tag.
+%% This was a BEAM compiler bug which was fixed by a patch to beam_dead.
+%%==========================================================================
+
+-module(bs_id3).
+
+-export([test/0]).
+
+-define(BIN, <<84,65,71,68,117,154,105,232,107,121,0,0,0,0,0,0,0,0,0,0,0,
+	       0,0,0,0,0,0,0,0,0,0,0,0,68,97,110,105,101,108,32,76,97,110,
+	       100,97,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,66,101,115,116,
+	       32,79,102,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+	       50,48,48,48,50,48,48,48,32,45,32,66,101,115,116,32,79,102,
+	       32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,12>>).
+
+test() ->
+  R1 = parse_only_v1_tag(?BIN),
+  R2 = parse_v1_or_v11_tag(?BIN),
+  %% io:format("~p\n~p\n", [R1, R2]),
+  R1 = R2,	% crash if not equal
+  ok.
+
+parse_only_v1_tag(<<"TAG", Title:30/binary,
+		    Artist:30/binary, Album:30/binary,
+	            _Year:4/binary, _Comment:30/binary,
+		    _Genre:8>>) ->
+  {ok,
+   {"ID3v1",
+    [{title, trim(Title)},
+     {artist, trim(Artist)},
+     {album, trim(Album)}]}};
+parse_only_v1_tag(_) ->
+  error.
+
+parse_v1_or_v11_tag(<<"TAG", Title:30/binary,
+		      Artist:30/binary, Album:30/binary,
+		      _Year:4/binary, _Comment:28/binary,
+		      0:8, Track:8, _Genre:8>>) ->
+  {ok,
+   {"ID3v1.1",
+    [{track, Track}, {title, trim(Title)},
+     {artist, trim(Artist)}, {album, trim(Album)}]}};
+parse_v1_or_v11_tag(<<"TAG", Title:30/binary,
+	              Artist:30/binary, Album:30/binary,
+	              _Year:4/binary, _Comment:30/binary,
+	              _Genre:8>>) ->
+  {ok,
+   {"ID3v1",
+    [{title, trim(Title)},
+     {artist, trim(Artist)},
+     {album, trim(Album)}]}};
+parse_v1_or_v11_tag(_) ->
+  error.
+
+trim(Bin) ->
+  list_to_binary(trim_blanks(binary_to_list(Bin))).
+
+trim_blanks(L) ->
+  lists:reverse(skip_blanks_and_zero(lists:reverse(L))).
+
+skip_blanks_and_zero([$\s|T]) ->
+  skip_blanks_and_zero(T);
+skip_blanks_and_zero([0|T]) ->
+  skip_blanks_and_zero(T);
+skip_blanks_and_zero(L) ->
+  L.
-- 
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