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authorJohn Högberg <[email protected]>2017-10-02 12:41:29 +0200
committerJohn Högberg <[email protected]>2017-10-02 12:41:29 +0200
commit8be41363658ab89db1e8c03d5c0df2c1bfe5f7ff (patch)
treeac2cc348db15004e8a824a9cea7d7bc0c6585105 /erts/preloaded/src
parent49d0857634fc1a990ab97a144787288570fa2507 (diff)
parentf178f46023da20fb2728e9b95b3d14a1c4c6b5ce (diff)
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Merge branch 'maint'
Diffstat (limited to 'erts/preloaded/src')
-rw-r--r--erts/preloaded/src/zlib.erl36
1 files changed, 25 insertions, 11 deletions
diff --git a/erts/preloaded/src/zlib.erl b/erts/preloaded/src/zlib.erl
index dca5a42779..611010550f 100644
--- a/erts/preloaded/src/zlib.erl
+++ b/erts/preloaded/src/zlib.erl
@@ -23,7 +23,7 @@
-export([open/0,close/1,deflateInit/1,deflateInit/2,deflateInit/6,
deflateSetDictionary/2,deflateReset/1,deflateParams/3,
deflate/2,deflate/3,deflateEnd/1,
- inflateInit/1,inflateInit/2,
+ inflateInit/1,inflateInit/2,inflateInit/3,
inflateSetDictionary/2,inflateGetDictionary/1, inflateReset/1,
inflate/2,inflate/3,inflateEnd/1,
inflateChunk/2,inflateChunk/1,
@@ -68,6 +68,13 @@
-define(MAX_WBITS, 15).
+-define(DEFAULT_MEMLEVEL, 8).
+-define(DEFAULT_WBITS, 15).
+
+-define(EOS_BEHAVIOR_ERROR, 0).
+-define(EOS_BEHAVIOR_RESET, 1).
+-define(EOS_BEHAVIOR_CUT, 2).
+
%% Chunk sizes are hardcoded on account of them screwing with the
%% predictability of the system. zlib is incapable of trapping so we need to
%% ensure that it never operates on any significant amount of data.
@@ -130,10 +137,7 @@ deflateInit(Z) ->
Z :: zstream(),
Level :: zlevel().
deflateInit(Z, Level) ->
- deflateInit_nif(Z, arg_level(Level)).
-
-deflateInit_nif(_Z, _Level) ->
- erlang:nif_error(undef).
+ deflateInit(Z, Level, deflated, ?DEFAULT_WBITS, ?DEFAULT_MEMLEVEL, default).
-spec deflateInit(Z, Level, Method, WindowBits, MemLevel, Strategy) -> 'ok' when
Z :: zstream(),
@@ -225,16 +229,21 @@ deflateEnd_nif(_Z) ->
-spec inflateInit(Z) -> 'ok' when
Z :: zstream().
inflateInit(Z) ->
- inflateInit_nif(Z).
-inflateInit_nif(_Z) ->
- erlang:nif_error(undef).
+ inflateInit(Z, ?DEFAULT_WBITS).
-spec inflateInit(Z, WindowBits) -> 'ok' when
Z :: zstream(),
WindowBits :: zwindowbits().
inflateInit(Z, WindowBits) ->
- inflateInit_nif(Z, WindowBits).
-inflateInit_nif(_Z, _WindowBits) ->
+ inflateInit(Z, WindowBits, cut).
+
+-spec inflateInit(Z, WindowBits, EoSBehavior) -> 'ok' when
+ Z :: zstream(),
+ WindowBits :: zwindowbits(),
+ EoSBehavior :: error | reset | cut.
+inflateInit(Z, WindowBits, EoSBehavior) ->
+ inflateInit_nif(Z, arg_bitsz(WindowBits), arg_eos_behavior(EoSBehavior)).
+inflateInit_nif(_Z, _WindowBits, _EoSBehavior) ->
erlang:nif_error(undef).
-spec inflateSetDictionary(Z, Dictionary) -> 'ok' when
@@ -532,7 +541,7 @@ gzip(Data) ->
gunzip(Data) ->
Z = open(),
Bs = try
- inflateInit(Z, 16+?MAX_WBITS),
+ inflateInit(Z, 16+?MAX_WBITS, reset),
B = inflate(Z, Data),
inflateEnd(Z),
B
@@ -652,6 +661,11 @@ arg_strategy(_) -> erlang:error(bad_compression_strategy).
arg_method(deflated) -> ?Z_DEFLATED;
arg_method(_) -> erlang:error(bad_compression_method).
+arg_eos_behavior(error) -> ?EOS_BEHAVIOR_ERROR;
+arg_eos_behavior(reset) -> ?EOS_BEHAVIOR_RESET;
+arg_eos_behavior(cut) -> ?EOS_BEHAVIOR_CUT;
+arg_eos_behavior(_) -> erlang:error(bad_eos_behavior).
+
-spec arg_bitsz(zwindowbits()) -> zwindowbits().
arg_bitsz(Bits) when is_integer(Bits) andalso
((8 =< Bits andalso Bits < 48) orelse