diff options
author | Stavros Aronis <[email protected]> | 2010-06-18 03:44:25 +0300 |
---|---|---|
committer | Lukas Larsson <[email protected]> | 2011-02-18 12:03:18 +0100 |
commit | 98de31e836a04ccc8f5f9acd90b9ba0803a24ab5 (patch) | |
tree | 3f26237297b0b2d9040de1b97eeb7cd75bce2dfe /lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl | |
parent | 08cec89bb1e781157a75c13e72562258b271b469 (diff) | |
download | otp-98de31e836a04ccc8f5f9acd90b9ba0803a24ab5.tar.gz otp-98de31e836a04ccc8f5f9acd90b9ba0803a24ab5.tar.bz2 otp-98de31e836a04ccc8f5f9acd90b9ba0803a24ab5.zip |
Test suites for Dialyzer
This is a transcription of most of the cvs.srv.it.uu.se:/hipe repository
dialyzer_tests into test suites that use the test server framework.
See README for information on how to use the included scripts for
modifications and updates.
When testing Dialyzer it's important that several OTP modules
are included in the plt. The suites takes care of that too.
Diffstat (limited to 'lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl')
-rw-r--r-- | lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl b/lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl new file mode 100644 index 0000000000..5fe28f1da1 --- /dev/null +++ b/lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl @@ -0,0 +1,27 @@ +%%-------------------------------------------------------------------- +%% Test case that exposed a bug (bogus warning) in dialyzer_dataflow +%% when refining binaries containing UTF-based segments. Reported by +%% Patrik Nyblom on 4/3/2009 and fixed by Kostis Sagonas on 31/3/2009. +%%-------------------------------------------------------------------- + +-module(bs_utf8). + +-export([doit/2]). + +doit(N, Bin) when is_integer(N), N > 0 -> + count_and_find(Bin, N). + +count_and_find(Bin, N) when is_binary(Bin) -> + cafu(Bin, N, 0, 0, no_pos). + +cafu(<<>>, _N, Count, _ByteCount, SavePos) -> + {Count, SavePos}; +cafu(<<_/utf8, Rest/binary>>, 0, Count, ByteCount, _SavePos) -> + cafu(Rest, -1, Count+1, 0, ByteCount); +cafu(<<_/utf8, Rest/binary>>, N, Count, _ByteCount, SavePos) when N < 0 -> + cafu(Rest, -1, Count+1, 0, SavePos); +cafu(<<_/utf8, Rest/binary>> = Whole, N, Count, ByteCount, SavePos) -> + Delta = byte_size(Whole) - byte_size(Rest), + cafu(Rest, N-1, Count+1, ByteCount+Delta, SavePos); +cafu(_Other, _N, Count, ByteCount, _SavePos) -> % Non Unicode character at end + {Count, ByteCount}. |