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| author | Lukas Larsson <[email protected]> | 2011-03-09 13:29:48 +0100 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2011-03-09 13:29:48 +0100 |
| commit | b6637f53cc885c336e3001617d742d79216c80e3 (patch) | |
| tree | ec92e4ebe5c2774a671ba5eba8032ca179339951 /lib/dialyzer/test/small_tests_SUITE_data/src/bs_utf8.erl | |
| parent | 62e056af8c4fa058faa5087614c6b837a07f06e6 (diff) | |
| parent | dd14097487c33ac4d1ceed36b96070feb545219f (diff) | |
| download | otp-b6637f53cc885c336e3001617d742d79216c80e3.tar.gz otp-b6637f53cc885c336e3001617d742d79216c80e3.tar.bz2 otp-b6637f53cc885c336e3001617d742d79216c80e3.zip | |
Merge branch 'aronisstav/dialyzer/dialyzer_tests/OTP-9116' into dev
* aronisstav/dialyzer/dialyzer_tests/OTP-9116:
Increase timetrap of options1 suite
Write output_plt even when plt_check is ok
Create plt with erts, kernel and stdlib only
Update test results as they currently appear in dev
Major restructure of dialyzer's testsuite
Add 'apps' option to the erlang interface
Update spec file to work with new common test structure
Test suites for Dialyzer
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}. |