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-rw-r--r--erts/preloaded/src/zlib.erl227
1 files changed, 154 insertions, 73 deletions
diff --git a/erts/preloaded/src/zlib.erl b/erts/preloaded/src/zlib.erl
index 51d6cd0a0b..210532edac 100644
--- a/erts/preloaded/src/zlib.erl
+++ b/erts/preloaded/src/zlib.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
@@ -124,7 +124,6 @@
-type zwindowbits() :: -15..-9 | 9..47.
-type zmemlevel() :: 1..9.
-type zstrategy() :: 'default' | 'filtered' | 'huffman_only'.
--type zflush() :: 'none' | 'sync' | 'full' | 'finish'.
%%------------------------------------------------------------------------
@@ -134,7 +133,8 @@ open() ->
open_port({spawn, "zlib_drv"}, [binary]).
%% close and release z_stream
--spec close(zstream()) -> 'ok'.
+-spec close(Z) -> 'ok' when
+ Z :: zstream().
close(Z) ->
try
true = port_close(Z),
@@ -145,16 +145,25 @@ close(Z) ->
catch _:_ -> erlang:error(badarg)
end.
--spec deflateInit(zstream()) -> 'ok'.
+-spec deflateInit(Z) -> 'ok' when
+ Z :: zstream().
deflateInit(Z) ->
call(Z, ?DEFLATE_INIT, <<?Z_DEFAULT_COMPRESSION:32>>).
--spec deflateInit(zstream(), zlevel()) -> 'ok'.
+-spec deflateInit(Z, Level) -> 'ok' when
+ Z :: zstream(),
+ Level :: zlevel().
deflateInit(Z, Level) ->
call(Z, ?DEFLATE_INIT, <<(arg_level(Level)):32>>).
--spec deflateInit(zstream(), zlevel(), zmethod(),
- zwindowbits(), zmemlevel(), zstrategy()) -> 'ok'.
+-spec deflateInit(Z, Level, Method,
+ WindowBits, MemLevel, Strategy) -> 'ok' when
+ Z :: zstream(),
+ Level :: zlevel(),
+ Method :: zmethod(),
+ WindowBits :: zwindowbits(),
+ MemLevel :: zmemlevel(),
+ Strategy :: zstrategy().
deflateInit(Z, Level, Method, WindowBits, MemLevel, Strategy) ->
call(Z, ?DEFLATE_INIT2, <<(arg_level(Level)):32,
(arg_method(Method)):32,
@@ -162,24 +171,38 @@ deflateInit(Z, Level, Method, WindowBits, MemLevel, Strategy) ->
(arg_mem(MemLevel)):32,
(arg_strategy(Strategy)):32>>).
--spec deflateSetDictionary(zstream(), binary()) -> integer().
+-spec deflateSetDictionary(Z, Dictionary) -> Adler32 when
+ Z :: zstream(),
+ Dictionary :: iodata(),
+ Adler32 :: integer().
deflateSetDictionary(Z, Dictionary) ->
call(Z, ?DEFLATE_SETDICT, Dictionary).
--spec deflateReset(zstream()) -> 'ok'.
+-spec deflateReset(Z) -> 'ok' when
+ Z :: zstream().
deflateReset(Z) ->
call(Z, ?DEFLATE_RESET, []).
--spec deflateParams(zstream(), zlevel(), zstrategy()) -> 'ok'.
+-spec deflateParams(Z, Level, Strategy) -> ok when
+ Z :: zstream(),
+ Level :: zlevel(),
+ Strategy :: zstrategy().
deflateParams(Z, Level, Strategy) ->
call(Z, ?DEFLATE_PARAMS, <<(arg_level(Level)):32,
(arg_strategy(Strategy)):32>>).
--spec deflate(zstream(), iodata()) -> iolist().
+-spec deflate(Z, Data) -> Compressed when
+ Z :: zstream(),
+ Data :: iodata(),
+ Compressed :: iolist().
deflate(Z, Data) ->
deflate(Z, Data, none).
--spec deflate(zstream(), iodata(), zflush()) -> iolist().
+-spec deflate(Z, Data, Flush) -> Compressed when
+ Z :: zstream(),
+ Data :: iodata(),
+ Flush :: none | sync | full | finish,
+ Compressed :: iolist().
deflate(Z, Data, Flush) ->
try port_command(Z, Data) of
true ->
@@ -191,19 +214,25 @@ deflate(Z, Data, Flush) ->
erlang:error(badarg)
end.
--spec deflateEnd(zstream()) -> 'ok'.
+-spec deflateEnd(Z) -> 'ok' when
+ Z :: zstream().
deflateEnd(Z) ->
call(Z, ?DEFLATE_END, []).
--spec inflateInit(zstream()) -> 'ok'.
+-spec inflateInit(Z) -> 'ok' when
+ Z :: zstream().
inflateInit(Z) ->
call(Z, ?INFLATE_INIT, []).
--spec inflateInit(zstream(), zwindowbits()) -> 'ok'.
+-spec inflateInit(Z, WindowBits) -> 'ok' when
+ Z :: zstream(),
+ WindowBits :: zwindowbits().
inflateInit(Z, WindowBits) ->
call(Z, ?INFLATE_INIT2, <<(arg_bitsz(WindowBits)):32>>).
--spec inflateSetDictionary(zstream(), binary()) -> 'ok'.
+-spec inflateSetDictionary(Z, Dictionary) -> 'ok' when
+ Z :: zstream(),
+ Dictionary :: iodata().
inflateSetDictionary(Z, Dictionary) ->
call(Z, ?INFLATE_SETDICT, Dictionary).
@@ -211,11 +240,15 @@ inflateSetDictionary(Z, Dictionary) ->
inflateSync(Z) ->
call(Z, ?INFLATE_SYNC, []).
--spec inflateReset(zstream()) -> 'ok'.
+-spec inflateReset(Z) -> 'ok' when
+ Z :: zstream().
inflateReset(Z) ->
call(Z, ?INFLATE_RESET, []).
--spec inflate(zstream(), iodata()) -> iolist().
+-spec inflate(Z, Data) -> Decompressed when
+ Z :: zstream(),
+ Data :: iodata(),
+ Decompressed :: iolist().
inflate(Z, Data) ->
try port_command(Z, Data) of
true ->
@@ -227,50 +260,79 @@ inflate(Z, Data) ->
erlang:error(badarg)
end.
--spec inflateEnd(zstream()) -> 'ok'.
+-spec inflateEnd(Z) -> 'ok' when
+ Z :: zstream().
inflateEnd(Z) ->
call(Z, ?INFLATE_END, []).
--spec setBufSize(zstream(), non_neg_integer()) -> 'ok'.
+-spec setBufSize(Z, Size) -> 'ok' when
+ Z :: zstream(),
+ Size :: non_neg_integer().
setBufSize(Z, Size) ->
call(Z, ?SET_BUFSZ, <<Size:32>>).
--spec getBufSize(zstream()) -> non_neg_integer().
+-spec getBufSize(Z) -> Size when
+ Z :: zstream(),
+ Size :: non_neg_integer().
getBufSize(Z) ->
call(Z, ?GET_BUFSZ, []).
--spec crc32(zstream()) -> integer().
+-spec crc32(Z) -> CRC when
+ Z :: zstream(),
+ CRC :: integer().
crc32(Z) ->
call(Z, ?CRC32_0, []).
--spec crc32(zstream(), binary()) -> integer().
-crc32(Z, Binary) ->
- call(Z, ?CRC32_1, Binary).
-
--spec crc32(zstream(), integer(), binary()) -> integer().
-crc32(Z, CRC, Binary) when is_binary(Binary), is_integer(CRC) ->
- call(Z, ?CRC32_2, <<CRC:32, Binary/binary>>);
-crc32(_Z, _CRC, _Binary) ->
- erlang:error(badarg).
-
--spec adler32(zstream(), binary()) -> integer().
-adler32(Z, Binary) ->
- call(Z, ?ADLER32_1, Binary).
-
--spec adler32(zstream(), integer(), binary()) -> integer().
-adler32(Z, Adler, Binary) when is_binary(Binary), is_integer(Adler) ->
- call(Z, ?ADLER32_2, <<Adler:32, Binary/binary>>);
-adler32(_Z, _Adler, _Binary) ->
+-spec crc32(Z, Data) -> CRC when
+ Z :: zstream(),
+ Data :: iodata(),
+ CRC :: integer().
+crc32(Z, Data) ->
+ call(Z, ?CRC32_1, Data).
+
+-spec crc32(Z, PrevCRC, Data) -> CRC when
+ Z :: zstream(),
+ PrevCRC :: integer(),
+ Data :: iodata(),
+ CRC :: integer().
+crc32(Z, CRC, Data) ->
+ call(Z, ?CRC32_2, [<<CRC:32>>, Data]).
+
+-spec adler32(Z, Data) -> CheckSum when
+ Z :: zstream(),
+ Data :: iodata(),
+ CheckSum :: integer().
+adler32(Z, Data) ->
+ call(Z, ?ADLER32_1, Data).
+
+-spec adler32(Z, PrevAdler, Data) -> CheckSum when
+ Z :: zstream(),
+ PrevAdler :: integer(),
+ Data :: iodata(),
+ CheckSum :: integer().
+adler32(Z, Adler, Data) when is_integer(Adler) ->
+ call(Z, ?ADLER32_2, [<<Adler:32>>, Data]);
+adler32(_Z, _Adler, _Data) ->
erlang:error(badarg).
--spec crc32_combine(zstream(), integer(), integer(), integer()) -> integer().
+-spec crc32_combine(Z, CRC1, CRC2, Size2) -> CRC when
+ Z :: zstream(),
+ CRC :: integer(),
+ CRC1 :: integer(),
+ CRC2 :: integer(),
+ Size2 :: integer().
crc32_combine(Z, CRC1, CRC2, Len2)
when is_integer(CRC1), is_integer(CRC2), is_integer(Len2) ->
call(Z, ?CRC32_COMBINE, <<CRC1:32, CRC2:32, Len2:32>>);
crc32_combine(_Z, _CRC1, _CRC2, _Len2) ->
erlang:error(badarg).
--spec adler32_combine(zstream(), integer(), integer(), integer()) -> integer().
+-spec adler32_combine(Z, Adler1, Adler2, Size2) -> Adler when
+ Z :: zstream(),
+ Adler :: integer(),
+ Adler1 :: integer(),
+ Adler2 :: integer(),
+ Size2 :: integer().
adler32_combine(Z, Adler1, Adler2, Len2)
when is_integer(Adler1), is_integer(Adler2), is_integer(Len2) ->
call(Z, ?ADLER32_COMBINE, <<Adler1:32, Adler2:32, Len2:32>>);
@@ -282,64 +344,83 @@ getQSize(Z) ->
call(Z, ?GET_QSIZE, []).
%% compress/uncompress zlib with header
--spec compress(binary()) -> binary().
-compress(Binary) ->
+-spec compress(Data) -> Compressed when
+ Data :: iodata(),
+ Compressed :: binary().
+compress(Data) ->
Z = open(),
deflateInit(Z, default),
- Bs = deflate(Z, Binary,finish),
+ Bs = deflate(Z, Data, finish),
deflateEnd(Z),
close(Z),
- list_to_binary(Bs).
-
--spec uncompress(binary()) -> binary().
-uncompress(Binary) when byte_size(Binary) >= 8 ->
- Z = open(),
- inflateInit(Z),
- Bs = inflate(Z, Binary),
- inflateEnd(Z),
- close(Z),
- list_to_binary(Bs);
-uncompress(Binary) when is_binary(Binary) -> erlang:error(data_error);
-uncompress(_) -> erlang:error(badarg).
+ iolist_to_binary(Bs).
+
+-spec uncompress(Data) -> Decompressed when
+ Data :: iodata(),
+ Decompressed :: binary().
+uncompress(Data) ->
+ try iolist_size(Data) of
+ Size ->
+ if
+ Size >= 8 ->
+ Z = open(),
+ inflateInit(Z),
+ Bs = inflate(Z, Data),
+ inflateEnd(Z),
+ close(Z),
+ iolist_to_binary(Bs);
+ true ->
+ erlang:error(data_error)
+ end
+ catch
+ _:_ ->
+ erlang:error(badarg)
+ end.
%% unzip/zip zlib without header (zip members)
--spec zip(binary()) -> binary().
-zip(Binary) ->
+-spec zip(Data) -> Compressed when
+ Data :: iodata(),
+ Compressed :: binary().
+zip(Data) ->
Z = open(),
deflateInit(Z, default, deflated, -?MAX_WBITS, 8, default),
- Bs = deflate(Z, Binary, finish),
+ Bs = deflate(Z, Data, finish),
deflateEnd(Z),
close(Z),
- list_to_binary(Bs).
+ iolist_to_binary(Bs).
--spec unzip(binary()) -> binary().
-unzip(Binary) ->
+-spec unzip(Data) -> Decompressed when
+ Data :: iodata(),
+ Decompressed :: binary().
+unzip(Data) ->
Z = open(),
inflateInit(Z, -?MAX_WBITS),
- Bs = inflate(Z, Binary),
+ Bs = inflate(Z, Data),
inflateEnd(Z),
close(Z),
- list_to_binary(Bs).
+ iolist_to_binary(Bs).
--spec gzip(iodata()) -> binary().
-gzip(Data) when is_binary(Data); is_list(Data) ->
+-spec gzip(Data) -> Compressed when
+ Data :: iodata(),
+ Compressed :: binary().
+gzip(Data) ->
Z = open(),
deflateInit(Z, default, deflated, 16+?MAX_WBITS, 8, default),
Bs = deflate(Z, Data, finish),
deflateEnd(Z),
close(Z),
- iolist_to_binary(Bs);
-gzip(_) -> erlang:error(badarg).
+ iolist_to_binary(Bs).
--spec gunzip(iodata()) -> binary().
-gunzip(Data) when is_binary(Data); is_list(Data) ->
+-spec gunzip(Data) -> Decompressed when
+ Data :: iodata(),
+ Decompressed :: binary().
+gunzip(Data) ->
Z = open(),
inflateInit(Z, 16+?MAX_WBITS),
Bs = inflate(Z, Data),
inflateEnd(Z),
close(Z),
- iolist_to_binary(Bs);
-gunzip(_) -> erlang:error(badarg).
+ iolist_to_binary(Bs).
-spec collect(zstream()) -> iolist().
collect(Z) ->
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