diff options
Diffstat (limited to 'lib/hipe/test/bs_SUITE_data/bs_checksum.erl')
| -rw-r--r-- | lib/hipe/test/bs_SUITE_data/bs_checksum.erl | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/hipe/test/bs_SUITE_data/bs_checksum.erl b/lib/hipe/test/bs_SUITE_data/bs_checksum.erl new file mode 100644 index 0000000000..ca4f254f12 --- /dev/null +++ b/lib/hipe/test/bs_SUITE_data/bs_checksum.erl @@ -0,0 +1,35 @@ +%% -*- erlang-indent-level: 2 -*- +%%-------------------------------------------------------------------- +%% Code from Zoltan Toth that crashed the HiPE compiler (in R11B-3). +%% The problem was that the binary matching produces a pretty large +%% integer and we tried to find the range for this integer in a bad way. +%% Fixed on the same day -- 6th March 2007. +%%-------------------------------------------------------------------- + +-module(bs_checksum). + +-export([test/0]). + +test() -> + "3389DAE361AF79B04C9C8E7057F60CC6" = checksum(<<42>>), + ok. + +checksum(Bin) -> + Context = erlang:md5_init(), + checksum(Context, Bin). + +checksum(Context, <<>>) -> + bin_to_hex(erlang:md5_final(Context)); +checksum(Context, <<Bin:20480/binary,Rest/binary>>) -> + checksum(erlang:md5_update(Context, Bin), Rest); +checksum(Context,Bin) -> + checksum(erlang:md5_update(Context, Bin), <<>>). + +bin_to_hex(Bin) -> + lists:flatten([byte_to_hex(X) || X <- binary_to_list(Bin)]). + +byte_to_hex(Byte) -> + [int_to_hex(Byte div 16), int_to_hex(Byte rem 16)]. + +int_to_hex(Int) when Int < 10 -> $0 + Int; +int_to_hex(Int) when Int > 9 -> $A + Int - 10. |