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-rw-r--r--erts/doc/src/zlib.xml227
-rw-r--r--erts/emulator/Makefile.in6
-rw-r--r--erts/emulator/drivers/common/zlib_drv.c792
-rw-r--r--erts/emulator/nifs/common/zlib_nif.c1019
-rw-r--r--erts/preloaded/ebin/init.beambin50344 -> 50380 bytes
-rw-r--r--erts/preloaded/ebin/zlib.beambin14316 -> 19120 bytes
-rw-r--r--erts/preloaded/src/init.erl2
-rw-r--r--erts/preloaded/src/zlib.erl703
8 files changed, 1605 insertions, 1144 deletions
diff --git a/erts/doc/src/zlib.xml b/erts/doc/src/zlib.xml
index 1d272c4c18..f5cc1b1e64 100644
--- a/erts/doc/src/zlib.xml
+++ b/erts/doc/src/zlib.xml
@@ -65,13 +65,17 @@ list_to_binary([Compressed|Last])</pre>
<tag><c>badarg</c></tag>
<item>Bad argument.
</item>
+ <tag><c>not_initialized</c></tag>
+ <item>The stream hasn't been initialized, eg. if
+ <seealso marker="#inflateInit/1"><c>inflateInit/1</c></seealso> wasn't
+ called prior to a call to
+ <seealso marker="#inflate/2"><c>inflate/2</c></seealso>.
+ </item>
<tag><c>data_error</c></tag>
<item>The data contains errors.
</item>
<tag><c>stream_error</c></tag>
<item>Inconsistent stream state.</item>
- <tag><c>einval</c></tag>
- <item>Bad value or wrong function called.</item>
<tag><c>{need_dictionary,Adler32}</c></tag>
<item>See <seealso marker="#inflate/2"><c>inflate/2</c></seealso>.
</item>
@@ -90,6 +94,9 @@ list_to_binary([Compressed|Last])</pre>
<name name="zlevel"/>
</datatype>
<datatype>
+ <name name="zflush"/>
+ </datatype>
+ <datatype>
<name name="zmemlevel"/>
</datatype>
<datatype>
@@ -112,6 +119,11 @@ list_to_binary([Compressed|Last])</pre>
<fsummary>Calculate the Adler checksum.</fsummary>
<desc>
<p>Calculates the Adler-32 checksum for <c><anno>Data</anno></c>.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#adler32/1">
+ <c>erlang:adler32/1</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -127,6 +139,11 @@ list_to_binary([Compressed|Last])</pre>
Crc = lists:foldl(fun(Data,Crc0) ->
zlib:adler32(Z, Crc0, Data),
end, zlib:adler32(Z,&lt;&lt; &gt;&gt;), Datas)</pre>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#adler32/2">
+ <c>erlang:adler32/2</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -141,6 +158,11 @@ Crc = lists:foldl(fun(Data,Crc0) ->
<p>This function returns the <c><anno>Adler</anno></c> checksum of
<c>[Data1,Data2]</c>, requiring only <c><anno>Adler1</anno></c>,
<c><anno>Adler2</anno></c>, and <c><anno>Size2</anno></c>.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#adler32_combine/3">
+ <c>erlang:adler32_combine/3</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -165,6 +187,12 @@ Crc = lists:foldl(fun(Data,Crc0) ->
<fsummary>Get current CRC.</fsummary>
<desc>
<p>Gets the current calculated CRC checksum.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#crc32/1">
+ <c>erlang:crc32/1</c></seealso> on the uncompressed data
+ instead.</p>
+ </warning>
</desc>
</func>
@@ -173,6 +201,11 @@ Crc = lists:foldl(fun(Data,Crc0) ->
<fsummary>Calculate CRC.</fsummary>
<desc>
<p>Calculates the CRC checksum for <c><anno>Data</anno></c>.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#crc32/1">
+ <c>erlang:crc32/1</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -188,6 +221,11 @@ Crc = lists:foldl(fun(Data,Crc0) ->
Crc = lists:foldl(fun(Data,Crc0) ->
zlib:crc32(Z, Crc0, Data),
end, zlib:crc32(Z,&lt;&lt; &gt;&gt;), Datas)</pre>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#crc32/2">
+ <c>erlang:crc32/2</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -202,6 +240,11 @@ Crc = lists:foldl(fun(Data,Crc0) ->
<p>This function returns the <c><anno>CRC</anno></c> checksum of
<c>[Data1,Data2]</c>, requiring only <c><anno>CRC1</anno></c>,
<c><anno>CRC2</anno></c>, and <c><anno>Size2</anno></c>.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="erts:erlang#crc32_combine/3">
+ <c>erlang:crc32_combine/3</c></seealso> instead.</p>
+ </warning>
</desc>
</func>
@@ -407,8 +450,8 @@ list_to_binary([B1,B2])</pre>
<seealso marker="#deflateInit/1"><c>deflateInit/1,2,6</c></seealso> or
<seealso marker="#deflateReset/1"><c>deflateReset/1</c></seealso>,
before any call of
- <seealso marker="#deflate/3"><c>deflate/3</c></seealso>.
- The compressor and decompressor must use the same dictionary (see
+ <seealso marker="#deflate/3"><c>deflate/3</c></seealso>.</p>
+ <p>The compressor and decompressor must use the same dictionary (see
<seealso marker="#inflateSetDictionary/2">
<c>inflateSetDictionary/2</c></seealso>).</p>
<p>The Adler checksum of the dictionary is returned.</p>
@@ -420,6 +463,10 @@ list_to_binary([B1,B2])</pre>
<fsummary>Get buffer size.</fsummary>
<desc>
<p>Gets the size of the intermediate buffer.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release.</p>
+ </warning>
</desc>
</func>
@@ -443,14 +490,31 @@ list_to_binary([B1,B2])</pre>
<name name="inflate" arity="2"/>
<fsummary>Decompress data.</fsummary>
<desc>
- <p>Decompresses as much data as possible.
- It can introduce some output latency (reading
- input without producing any output).</p>
- <p>If a preset dictionary is needed at this point (see
- <seealso marker="#inflateSetDictionary/2">
- <c>inflateSetDictionary/2</c></seealso>), <c>inflate/2</c> throws a
- <c>{need_dictionary,Adler}</c> exception, where <c>Adler</c> is
- the Adler-32 checksum of the dictionary chosen by the compressor.</p>
+ <p>Equivalent to
+ <seealso marker="#inflate/3"><c>inflate(Z, Data, [])</c></seealso>
+ </p>
+ </desc>
+ </func>
+
+ <func>
+ <name name="inflate" arity="3"/>
+ <fsummary>Decompress data.</fsummary>
+ <desc>
+ <p>Decompresses as much data as possible. It can introduce some output
+ latency (reading input without producing any output).</p>
+ <p>Currently the only available option is
+ <c>{exception_on_need_dict,boolean()}</c> which controls whether the
+ function should throw an exception when a preset dictionary is
+ required for decompression. When set to false, a
+ <c>need_dictionary</c> tuple will be returned instead. See
+ <seealso marker="#inflateSetDictionary/2">
+ <c>inflateSetDictionary/2</c></seealso> for details.</p>
+ <warning>
+ <p>This option defaults to <c>true</c> for backwards compatibility
+ but we intend to remove the exception behavior in a future
+ release. New code that needs to handle dictionaries manually
+ should always specify <c>{exception_on_need_dict,false}</c>.</p>
+ </warning>
</desc>
</func>
@@ -458,6 +522,11 @@ list_to_binary([B1,B2])</pre>
<name name="inflateChunk" arity="1"/>
<fsummary>Read next uncompressed chunk.</fsummary>
<desc>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="#safeInflate/2"><c>safeInflate/2</c>
+ </seealso> instead.</p>
+ </warning>
<p>Reads the next chunk of uncompressed data, initialized by
<seealso marker="#inflateChunk/2"><c>inflateChunk/2</c></seealso>.</p>
<p>This function is to be repeatedly called, while it returns
@@ -469,23 +538,27 @@ list_to_binary([B1,B2])</pre>
<name name="inflateChunk" arity="2"/>
<fsummary>Decompress data with limited output size.</fsummary>
<desc>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release. Use <seealso marker="#safeInflate/2"><c>safeInflate/2</c>
+ </seealso> instead.</p>
+ </warning>
<p>Like <seealso marker="#inflate/2"><c>inflate/2</c></seealso>,
- but decompresses no more data than will fit in the buffer configured
- through <seealso marker="#setBufSize/2"><c>setBufSize/2</c></seealso>.
- Is is useful when decompressing a stream with a high compression
- ratio, such that a small amount of compressed input can expand up to
- 1000 times.</p>
+ but decompresses no more data than will fit in the buffer configured
+ through <seealso marker="#setBufSize/2"><c>setBufSize/2</c>
+ </seealso>. Is is useful when decompressing a stream with a high
+ compression ratio, such that a small amount of compressed input can
+ expand up to 1000 times.</p>
<p>This function returns <c>{more, Decompressed}</c>, when there is
- more output available, and
- <seealso marker="#inflateChunk/1"><c>inflateChunk/1</c></seealso>
- is to be used to read it.</p>
- <p>This function can introduce some output latency (reading
- input without producing any output).</p>
- <p>If a preset dictionary is needed at this point (see
- <seealso marker="#inflateSetDictionary/2">
- <c>inflateSetDictionary/2</c></seealso>), this function throws a
- <c>{need_dictionary,Adler}</c> exception, where <c>Adler</c> is
- the Adler-32 checksum of the dictionary chosen by the compressor.</p>
+ more output available, and
+ <seealso marker="#inflateChunk/1"><c>inflateChunk/1</c></seealso>
+ is to be used to read it.</p>
+ <p>This function can introduce some output latency (reading input
+ without producing any output).</p>
+ <p>An exception will be thrown if a preset dictionary is required for
+ further decompression. See
+ <seealso marker="#inflateSetDictionary/2">
+ <c>inflateSetDictionary/2</c></seealso> for details.</p>
<p>Example:</p>
<pre>
walk(Compressed, Handler) ->
@@ -517,6 +590,18 @@ loop(Z, Handler, Uncompressed) ->
</func>
<func>
+ <name name="inflateGetDictionary" arity="1"/>
+ <fsummary>Return the decompression dictionary.</fsummary>
+ <desc>
+ <p>Returns the decompression dictionary currently in use
+ by the stream. This function must be called between
+ <seealso marker="#inflateInit/1"><c>inflateInit/1,2</c></seealso>
+ and <seealso marker="#inflateEnd/1"><c>inflateEnd</c></seealso>.</p>
+ <p>Only supported if ERTS was compiled with zlib >= 1.2.8.</p>
+ </desc>
+ </func>
+
+ <func>
<name name="inflateInit" arity="1"/>
<fsummary>Initialize a session for decompression.</fsummary>
<desc>
@@ -562,45 +647,83 @@ loop(Z, Handler, Uncompressed) ->
<fsummary>Initialize the decompression dictionary.</fsummary>
<desc>
<p>Initializes the decompression dictionary from the specified
- uncompressed byte sequence. This function must be called
- immediately after a call of
- <seealso marker="#inflate/2"><c>inflate/2</c></seealso>
- if this call threw a <c>{need_dictionary,Adler}</c> exception.
- The dictionary chosen by the compressor can be determined from the
- Adler value thrown by the call to <c>inflate/2</c>.
- The compressor and decompressor must use the same dictionary (see
- <seealso marker="#deflateSetDictionary/2">
- <c>deflateSetDictionary/2</c></seealso>).</p>
+ uncompressed byte sequence. This function must be called as a
+ response to an inflate operation (eg.
+ <seealso marker="#safeInflate/2"><c>safeInflate/2</c></seealso>)
+ returning <c>{need_dictionary,Adler,Output}</c> or in the case of
+ deprecated functions, throwing an
+ <c>{'EXIT',{{need_dictionary,Adler},_StackTrace}}</c> exception.</p>
+ <p>The dictionary chosen by the compressor can be determined from the
+ Adler value returned or thrown by the call to the inflate function.
+ The compressor and decompressor must use the same dictionary (See
+ <seealso marker="#deflateSetDictionary/2">
+ <c>deflateSetDictionary/2</c></seealso>).</p>
+ <p>After setting the dictionary the inflate operation should be
+ retried without new input.</p>
<p>Example:</p>
<pre>
-unpack(Z, Compressed, Dict) ->
+deprecated_unpack(Z, Compressed, Dict) ->
case catch zlib:inflate(Z, Compressed) of
- {'EXIT',{{need_dictionary,DictID},_}} ->
- zlib:inflateSetDictionary(Z, Dict),
+ {'EXIT',{{need_dictionary,_DictID},_}} ->
+ ok = zlib:inflateSetDictionary(Z, Dict),
Uncompressed = zlib:inflate(Z, []);
Uncompressed ->
Uncompressed
- end.</pre>
+ end.
+
+new_unpack(Z, Compressed, Dict) ->
+ case zlib:inflate(Z, Compressed, [{exception_on_need_dict, false}]) of
+ {need_dictionary, _DictId, Output} ->
+ ok = zlib:inflateSetDictionary(Z, Dict),
+ [Output | zlib:inflate(Z, [])];
+ Uncompressed ->
+ Uncompressed
+ end.</pre>
</desc>
</func>
<func>
- <name name="inflateGetDictionary" arity="1"/>
- <fsummary>Return the decompression dictionary.</fsummary>
+ <name name="open" arity="0"/>
+ <fsummary>Open a stream and return a stream reference.</fsummary>
<desc>
- <p>Returns the decompression dictionary currently in use
- by the stream. This function must be called between
- <seealso marker="#inflateInit/1"><c>inflateInit/1,2</c></seealso>
- and <seealso marker="#inflateEnd/1"><c>inflateEnd</c></seealso>.</p>
- <p>Only supported if ERTS was compiled with zlib >= 1.2.8.</p>
+ <p>Opens a zlib stream.</p>
</desc>
</func>
<func>
- <name name="open" arity="0"/>
- <fsummary>Open a stream and return a stream reference.</fsummary>
+ <name name="safeInflate" arity="2"/>
+ <fsummary>Decompress data with limited output size.</fsummary>
<desc>
- <p>Opens a zlib stream.</p>
+ <p>Like <seealso marker="#inflate/2"><c>inflate/2</c></seealso>,
+ but returns once it has expanded beyond a small
+ implementation-defined threshold. It's useful when decompressing
+ untrusted input which could have been maliciously crafted to expand
+ until the system runs out of memory.</p>
+ <p>This function returns <c>{continue | finished, Output}</c>, where
+ <anno>Output</anno> is the data that was decompressed in this call.
+ New input can be queued up on each call if desired, and the function
+ will return <c>{finished, Output}</c> once all queued data has been
+ decompressed.</p>
+ <p>This function can introduce some output latency (reading
+ input without producing any output).</p>
+ <p>If a preset dictionary is required for further decompression, this
+ function returns a <c>need_dictionary</c> tuple. See
+ <seealso marker="#inflateSetDictionary/2">
+ <c>inflateSetDictionary/2</c></seealso>) for details.</p>
+ <p>Example:</p>
+ <pre>
+walk(Compressed, Handler) ->
+ Z = zlib:open(),
+ zlib:inflateInit(Z),
+ loop(Z, Handler, zlib:safeInflate(Z, Compressed)),
+ zlib:inflateEnd(Z),
+ zlib:close(Z).
+
+loop(Z, Handler, {continue, Output}) ->
+ Handler(Output),
+ loop(Z, Handler, zlib:safeInflate(Z, []));
+loop(Z, Handler, {finished, Output}) ->
+ Handler(Output).</pre>
</desc>
</func>
@@ -609,6 +732,10 @@ unpack(Z, Compressed, Dict) ->
<fsummary>Set buffer size.</fsummary>
<desc>
<p>Sets the intermediate buffer size.</p>
+ <warning>
+ <p>This function is deprecated and will be removed in a future
+ release.</p>
+ </warning>
</desc>
</func>
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index cc1fa571df..1916b97a89 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -819,14 +819,15 @@ RUN_OBJS = \
$(OBJDIR)/erl_io_queue.o
LTTNG_OBJS = $(OBJDIR)/erlang_lttng.o
-NIF_OBJS = $(OBJDIR)/erl_tracer_nif.o
+NIF_OBJS = \
+ $(OBJDIR)/erl_tracer_nif.o \
+ $(OBJDIR)/zlib_nif.o
ifeq ($(TARGET),win32)
DRV_OBJS = \
$(OBJDIR)/registry_drv.o \
$(OBJDIR)/efile_drv.o \
$(OBJDIR)/inet_drv.o \
- $(OBJDIR)/zlib_drv.o \
$(OBJDIR)/ram_file_drv.o \
$(OBJDIR)/ttsl_drv.o
OS_OBJS = \
@@ -856,7 +857,6 @@ OS_OBJS = \
DRV_OBJS = \
$(OBJDIR)/efile_drv.o \
$(OBJDIR)/inet_drv.o \
- $(OBJDIR)/zlib_drv.o \
$(OBJDIR)/ram_file_drv.o \
$(OBJDIR)/ttsl_drv.o
endif
diff --git a/erts/emulator/drivers/common/zlib_drv.c b/erts/emulator/drivers/common/zlib_drv.c
deleted file mode 100644
index e342e414b5..0000000000
--- a/erts/emulator/drivers/common/zlib_drv.c
+++ /dev/null
@@ -1,792 +0,0 @@
-/*
- * %CopyrightBegin%
- *
- * Copyright Ericsson AB 2003-2017. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * %CopyrightEnd%
- */
-
-/*
- * ZLib interface for erlang
- *
- */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-#include <stdio.h>
-#include <zlib.h>
-#include <errno.h>
-#include <string.h>
-
-#include "erl_driver.h"
-
-
-#define DEFLATE_INIT 1
-#define DEFLATE_INIT2 2
-#define DEFLATE_SETDICT 3
-#define DEFLATE_RESET 4
-#define DEFLATE_END 5
-#define DEFLATE_PARAMS 6
-#define DEFLATE 7
-
-#define INFLATE_INIT 8
-#define INFLATE_INIT2 9
-#define INFLATE_SETDICT 10
-#define INFLATE_GETDICT 11
-#define INFLATE_SYNC 12
-#define INFLATE_RESET 13
-#define INFLATE_END 14
-#define INFLATE 15
-
-#define CRC32_0 16
-#define CRC32_1 17
-#define CRC32_2 18
-
-#define SET_BUFSZ 19
-#define GET_BUFSZ 20
-#define GET_QSIZE 21
-
-#define ADLER32_1 22
-#define ADLER32_2 23
-
-#define CRC32_COMBINE 24
-#define ADLER32_COMBINE 25
-
-#define INFLATE_CHUNK 26
-
-
-#define DEFAULT_BUFSZ 4000
-
-/* According to zlib documentation, it can never exceed this */
-#define INFL_DICT_SZ 32768
-
-/* This flag is used in the same places, where zlib return codes
- * (Z_OK, Z_STREAM_END, Z_NEED_DICT) are. So, we need to set it to
- * relatively large value to avoid possible value clashes in future.
- * */
-#define INFLATE_HAS_MORE 100
-
-static int zlib_init(void);
-static ErlDrvData zlib_start(ErlDrvPort port, char* buf);
-static void zlib_stop(ErlDrvData e);
-static void zlib_flush(ErlDrvData e);
-static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *buf,
- ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen);
-static void zlib_outputv(ErlDrvData drv_data, ErlIOVec *ev);
-
-ErlDrvEntry zlib_driver_entry = {
- zlib_init,
- zlib_start,
- zlib_stop,
- NULL, /* output */
- NULL, /* ready_input */
- NULL, /* ready_output */
- "zlib_drv",
- NULL, /* finish */
- NULL, /* handle */
- zlib_ctl,
- NULL, /* timeout */
- zlib_outputv,
- NULL, /* read_async */
- zlib_flush,
- NULL, /* call */
- NULL, /* event */
- ERL_DRV_EXTENDED_MARKER,
- ERL_DRV_EXTENDED_MAJOR_VERSION,
- ERL_DRV_EXTENDED_MINOR_VERSION,
- ERL_DRV_FLAG_USE_PORT_LOCKING,
- NULL, /* handle2 */
- NULL, /* process_exit */
-};
-
-typedef enum {
- ST_NONE = 0,
- ST_DEFLATE = 1,
- ST_INFLATE = 2
-} ZLibState;
-
-
-typedef struct {
- z_stream s;
- ZLibState state;
- ErlDrvBinary* bin;
- int binsz;
- int binsz_need;
- uLong crc;
- int inflate_eos_seen;
- int want_crc; /* 1 if crc is calculated on clear text */
- ErlDrvPort port; /* the associcated port */
-} ZLibData;
-
-static int zlib_inflate(ZLibData* d, int flush);
-static int zlib_deflate(ZLibData* d, int flush);
-
-#if defined(__WIN32__)
-static int i32(char* buf)
-#else
-static __inline__ int i32(char* buf)
-#endif
-{
- return (int) (
- (((int)((unsigned char*)buf)[0]) << 24) |
- (((int)((unsigned char*)buf)[1]) << 16) |
- (((int)((unsigned char*)buf)[2]) << 8) |
- (((int)((unsigned char*)buf)[3]) << 0));
-}
-
-static char* zlib_reason(int code, int* err)
-{
- switch(code) {
- case Z_OK:
- *err = 0;
- return "ok";
- case Z_STREAM_END:
- *err = 0;
- return "stream_end";
- case Z_ERRNO:
- *err = 1;
- return erl_errno_id(errno);
- case Z_STREAM_ERROR:
- *err = 1;
- return "stream_error";
- case Z_DATA_ERROR:
- *err = 1;
- return "data_error";
- case Z_MEM_ERROR:
- *err = 1;
- return "mem_error";
- case Z_BUF_ERROR:
- *err = 1;
- return "buf_error";
- case Z_VERSION_ERROR:
- *err = 1;
- return "version_error";
- default:
- *err = 1;
- return "unknown_error";
- }
-}
-
-
-static ErlDrvSSizeT zlib_return(int code, char** rbuf, ErlDrvSizeT rlen)
-{
- int msg_code = 0; /* 0=ok, 1=error */
- char* dst = *rbuf;
- char* src;
- ErlDrvSizeT len = 0;
-
- src = zlib_reason(code, &msg_code);
- *dst++ = msg_code;
- rlen--;
- len = 1;
-
- while((rlen > 0) && *src) {
- *dst++ = *src++;
- rlen--;
- len++;
- }
- return len;
-}
-
-static ErlDrvSSizeT zlib_value2(int msg_code, int value,
- char** rbuf, ErlDrvSizeT rlen)
-{
- char* dst = *rbuf;
-
- if (rlen < 5) {
- return -1;
- }
- *dst++ = msg_code;
- *dst++ = (value >> 24) & 0xff;
- *dst++ = (value >> 16) & 0xff;
- *dst++ = (value >> 8) & 0xff;
- *dst++ = value & 0xff;
- return 5;
-}
-
-static ErlDrvSSizeT zlib_value(int value, char** rbuf, ErlDrvSizeT rlen)
-{
- return zlib_value2(2, value, rbuf, rlen);
-}
-
-static int zlib_output_init(ZLibData* d)
-{
- if (d->bin != NULL)
- driver_free_binary(d->bin);
- if ((d->bin = driver_alloc_binary(d->binsz_need)) == NULL)
- return -1;
- d->binsz = d->binsz_need;
- d->s.next_out = (unsigned char*)d->bin->orig_bytes;
- d->s.avail_out = d->binsz;
- return 0;
-}
-
-/*
- * Send compressed or uncompressed data
- * and restart output procesing
- */
-static int zlib_output(ZLibData* d)
-{
- if (d->bin != NULL) {
- int len = d->binsz - d->s.avail_out;
- if (len > 0) {
- if (driver_output_binary(d->port, NULL, 0, d->bin, 0, len) < 0)
- return -1;
- }
- driver_free_binary(d->bin);
- d->bin = NULL;
- d->binsz = 0;
- }
- return zlib_output_init(d);
-}
-
-static int zlib_inflate_get_dictionary(ZLibData* d)
-{
-#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
- ErlDrvBinary* dbin = driver_alloc_binary(INFL_DICT_SZ);
- uInt dlen = 0;
- int res = inflateGetDictionary(&d->s, (unsigned char*)dbin->orig_bytes, &dlen);
- if ((res == Z_OK) && (driver_output_binary(d->port, NULL, 0, dbin, 0, dlen) < 0)) {
- res = Z_ERRNO;
- }
- driver_free_binary(dbin);
- return res;
-#else
- abort(); /* never called, just to silence 'unresolved symbol'
- for non-optimizing compiler */
-#endif
-}
-
-static int zlib_inflate(ZLibData* d, int flush)
-{
- int res = Z_OK;
-
- if ((d->bin == NULL) && (zlib_output_init(d) < 0)) {
- errno = ENOMEM;
- return Z_ERRNO;
- }
-
- while ((driver_sizeq(d->port) > 0) && (res != Z_STREAM_END)) {
- int vlen;
- SysIOVec* iov = driver_peekq(d->port, &vlen);
- int len;
- int possibly_more_output = 0;
-
- d->s.next_in = iov[0].iov_base;
- d->s.avail_in = iov[0].iov_len;
- while((possibly_more_output || (d->s.avail_in > 0)) && (res != Z_STREAM_END)) {
- res = inflate(&d->s, Z_NO_FLUSH);
- if (res == Z_NEED_DICT) {
- /* Essential to eat the header bytes that zlib has looked at */
- len = iov[0].iov_len - d->s.avail_in;
- driver_deq(d->port, len);
- return res;
- }
- if (res == Z_BUF_ERROR) {
- /* Was possible more output, but actually not */
- res = Z_OK;
- }
- else if (res < 0) {
- return res;
- }
- if (d->s.avail_out != 0) {
- possibly_more_output = 0;
- } else {
- if (d->want_crc)
- d->crc = crc32(d->crc, (unsigned char*)d->bin->orig_bytes,
- d->binsz - d->s.avail_out);
- zlib_output(d);
- possibly_more_output = 1;
- }
- }
- len = iov[0].iov_len - d->s.avail_in;
- driver_deq(d->port, len);
- }
-
- if (d->want_crc) {
- d->crc = crc32(d->crc, (unsigned char*) d->bin->orig_bytes,
- d->binsz - d->s.avail_out);
- }
- zlib_output(d);
- if (res == Z_STREAM_END) {
- d->inflate_eos_seen = 1;
- }
- return res;
-}
-
-static int zlib_inflate_chunk(ZLibData* d)
-{
- int res = Z_OK;
-
- if ((d->bin == NULL) && (zlib_output_init(d) < 0)) {
- errno = ENOMEM;
- return Z_ERRNO;
- }
-
- while ((driver_sizeq(d->port) > 0) && (d->s.avail_out > 0) &&
- (res != Z_STREAM_END)) {
- int vlen;
- SysIOVec* iov = driver_peekq(d->port, &vlen);
- int len;
-
- d->s.next_in = iov[0].iov_base;
- d->s.avail_in = iov[0].iov_len;
- while((d->s.avail_in > 0) && (d->s.avail_out > 0) && (res != Z_STREAM_END)) {
- res = inflate(&d->s, Z_NO_FLUSH);
- if (res == Z_NEED_DICT) {
- /* Essential to eat the header bytes that zlib has looked at */
- len = iov[0].iov_len - d->s.avail_in;
- driver_deq(d->port, len);
- return res;
- }
- if (res == Z_BUF_ERROR) {
- /* Was possible more output, but actually not */
- res = Z_OK;
- }
- else if (res < 0) {
- return res;
- }
- }
- len = iov[0].iov_len - d->s.avail_in;
- driver_deq(d->port, len);
- }
-
- /* We are here because all input was consumed or EOS reached or output
- * buffer is full */
- if (d->want_crc) {
- d->crc = crc32(d->crc, (unsigned char*) d->bin->orig_bytes,
- d->binsz - d->s.avail_out);
- }
- zlib_output(d);
- if ((res == Z_OK) && (d->s.avail_in > 0))
- res = INFLATE_HAS_MORE;
- else if (res == Z_STREAM_END) {
- d->inflate_eos_seen = 1;
- }
- return res;
-}
-
-static int zlib_deflate(ZLibData* d, int flush)
-{
- int res = Z_OK;
-
- if ((d->bin == NULL) && (zlib_output_init(d) < 0)) {
- errno = ENOMEM;
- return Z_ERRNO;
- }
-
- while ((driver_sizeq(d->port) > 0) && (res != Z_STREAM_END)) {
- int vlen;
- SysIOVec* iov = driver_peekq(d->port, &vlen);
- int len;
-
- d->s.next_in = iov[0].iov_base;
- d->s.avail_in = iov[0].iov_len;
-
- while((d->s.avail_in > 0) && (res != Z_STREAM_END)) {
- if ((res = deflate(&d->s, Z_NO_FLUSH)) < 0) {
- return res;
- }
- if (d->s.avail_out == 0) {
- zlib_output(d);
- }
- }
- len = iov[0].iov_len - d->s.avail_in;
- if (d->want_crc) {
- d->crc = crc32(d->crc, iov[0].iov_base, len);
- }
- driver_deq(d->port, len);
- }
-
- if (flush != Z_NO_FLUSH) {
- if ((res = deflate(&d->s, flush)) < 0) {
- return res;
- }
- if (flush == Z_FINISH) {
- while (d->s.avail_out < d->binsz) {
- zlib_output(d);
- if (res == Z_STREAM_END) {
- break;
- }
- if ((res = deflate(&d->s, flush)) < 0) {
- return res;
- }
- }
- } else {
- while (d->s.avail_out == 0) {
- zlib_output(d);
- if ((res = deflate(&d->s, flush)) < 0) {
- return res;
- }
- }
- if (d->s.avail_out < d->binsz) {
- zlib_output(d);
- }
- }
- }
- return res;
-}
-
-
-
-static void* zlib_alloc(void* data, unsigned int items, unsigned int size)
-{
- return (void*) driver_alloc(items*size);
-}
-
-static void zlib_free(void* data, void* addr)
-{
- driver_free(addr);
-}
-
-#if defined(__APPLE__) && defined(__MACH__) && defined(HAVE_ZLIB_INFLATEGETDICTIONARY)
-
-/* Work around broken build system with runtime version test */
-static int have_inflateGetDictionary;
-
-static int zlib_init()
-{
- unsigned int v[4] = {0, 0, 0, 0};
- unsigned hexver;
-
- sscanf(zlibVersion(), "%u.%u.%u.%u", &v[0], &v[1], &v[2], &v[3]);
-
- hexver = (v[0] << (8*3)) | (v[1] << (8*2)) | (v[2] << (8)) | v[3];
-
- have_inflateGetDictionary = (hexver >= 0x1020701); /* 1.2.7.1 */
-
- return 0;
-}
-#else /* trust configure got it right */
-# ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
-# define have_inflateGetDictionary 1
-# else
-# define have_inflateGetDictionary 0
-# endif
-static int zlib_init()
-{
- return 0;
-}
-#endif
-
-static ErlDrvData zlib_start(ErlDrvPort port, char* buf)
-{
- ZLibData* d;
-
- if ((d = (ZLibData*) driver_alloc(sizeof(ZLibData))) == NULL)
- return ERL_DRV_ERROR_GENERAL;
-
- memset(&d->s, 0, sizeof(z_stream));
-
- d->s.zalloc = zlib_alloc;
- d->s.zfree = zlib_free;
- d->s.opaque = d;
- d->s.data_type = Z_BINARY;
-
- d->port = port;
- d->state = ST_NONE;
- d->bin = NULL;
- d->binsz = 0;
- d->binsz_need = DEFAULT_BUFSZ;
- d->crc = crc32(0L, Z_NULL, 0);
- d->inflate_eos_seen = 0;
- d->want_crc = 0;
- return (ErlDrvData)d;
-}
-
-
-static void zlib_stop(ErlDrvData e)
-{
- ZLibData* d = (ZLibData*)e;
-
- if (d->state == ST_DEFLATE)
- deflateEnd(&d->s);
- else if (d->state == ST_INFLATE)
- inflateEnd(&d->s);
-
- if (d->bin != NULL)
- driver_free_binary(d->bin);
-
- driver_free(d);
-}
-
-static void zlib_flush(ErlDrvData drv_data)
-{
- ZLibData* d = (ZLibData*) drv_data;
-
- driver_deq(d->port, driver_sizeq(d->port));
-}
-
-static ErlDrvSSizeT zlib_ctl(ErlDrvData drv_data, unsigned int command, char *buf,
- ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen)
-{
- ZLibData* d = (ZLibData*)drv_data;
- int res;
-
- switch(command) {
- case DEFLATE_INIT:
- if (len != 4) goto badarg;
- if (d->state != ST_NONE) goto badarg;
- res = deflateInit(&d->s, i32(buf));
- if (res == Z_OK) {
- d->state = ST_DEFLATE;
- d->want_crc = 0;
- d->crc = crc32(0L, Z_NULL, 0);
- }
- return zlib_return(res, rbuf, rlen);
-
- case DEFLATE_INIT2: {
- int wbits;
-
- if (len != 20) goto badarg;
- if (d->state != ST_NONE) goto badarg;
- wbits = i32(buf+8);
- res = deflateInit2(&d->s, i32(buf), i32(buf+4), wbits,
- i32(buf+12), i32(buf+16));
- if (res == Z_OK) {
- d->state = ST_DEFLATE;
- d->want_crc = (wbits < 0);
- d->crc = crc32(0L, Z_NULL, 0);
- }
- return zlib_return(res, rbuf, rlen);
- }
-
- case DEFLATE_SETDICT:
- if (d->state != ST_DEFLATE) goto badarg;
- res = deflateSetDictionary(&d->s, (unsigned char*)buf, len);
- if (res == Z_OK) {
- return zlib_value(d->s.adler, rbuf, rlen);
- } else {
- return zlib_return(res, rbuf, rlen);
- }
-
- case DEFLATE_RESET:
- if (len != 0) goto badarg;
- if (d->state != ST_DEFLATE) goto badarg;
- driver_deq(d->port, driver_sizeq(d->port));
- res = deflateReset(&d->s);
- return zlib_return(res, rbuf, rlen);
-
- case DEFLATE_END:
- if (len != 0) goto badarg;
- if (d->state != ST_DEFLATE) goto badarg;
- driver_deq(d->port, driver_sizeq(d->port));
- res = deflateEnd(&d->s);
- d->state = ST_NONE;
- return zlib_return(res, rbuf, rlen);
-
- case DEFLATE_PARAMS:
- if (len != 8) goto badarg;
- if (d->state != ST_DEFLATE) goto badarg;
- res = deflateParams(&d->s, i32(buf), i32(buf+4));
- return zlib_return(res, rbuf, rlen);
-
- case DEFLATE:
- if (d->state != ST_DEFLATE) goto badarg;
- if (len != 4) goto badarg;
- res = zlib_deflate(d, i32(buf));
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_INIT:
- if (len != 0) goto badarg;
- if (d->state != ST_NONE) goto badarg;
- res = inflateInit(&d->s);
- if (res == Z_OK) {
- d->state = ST_INFLATE;
- d->inflate_eos_seen = 0;
- d->want_crc = 0;
- d->crc = crc32(0L, Z_NULL, 0);
- }
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_INIT2: {
- int wbits;
-
- if (len != 4) goto badarg;
- if (d->state != ST_NONE) goto badarg;
- wbits = i32(buf);
- res = inflateInit2(&d->s, wbits);
- if (res == Z_OK) {
- d->state = ST_INFLATE;
- d->inflate_eos_seen = 0;
- d->want_crc = (wbits < 0);
- d->crc = crc32(0L, Z_NULL, 0);
- }
- return zlib_return(res, rbuf, rlen);
- }
-
- case INFLATE_SETDICT:
- if (d->state != ST_INFLATE) goto badarg;
- res = inflateSetDictionary(&d->s, (unsigned char*)buf, len);
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_GETDICT:
- if (have_inflateGetDictionary) {
- if (d->state != ST_INFLATE) goto badarg;
- res = zlib_inflate_get_dictionary(d);
- } else {
- errno = ENOTSUP;
- res = Z_ERRNO;
- }
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_SYNC:
- if (d->state != ST_INFLATE) goto badarg;
- if (len != 0) goto badarg;
- if (driver_sizeq(d->port) == 0) {
- res = Z_BUF_ERROR;
- } else {
- int vlen;
- SysIOVec* iov = driver_peekq(d->port, &vlen);
-
- d->s.next_in = iov[0].iov_base;
- d->s.avail_in = iov[0].iov_len;
- res = inflateSync(&d->s);
- }
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_RESET:
- if (d->state != ST_INFLATE) goto badarg;
- if (len != 0) goto badarg;
- driver_deq(d->port, driver_sizeq(d->port));
- res = inflateReset(&d->s);
- d->inflate_eos_seen = 0;
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE_END:
- if (d->state != ST_INFLATE) goto badarg;
- if (len != 0) goto badarg;
- driver_deq(d->port, driver_sizeq(d->port));
- res = inflateEnd(&d->s);
- if (res == Z_OK && d->inflate_eos_seen == 0) {
- res = Z_DATA_ERROR;
- }
- d->state = ST_NONE;
- return zlib_return(res, rbuf, rlen);
-
- case INFLATE:
- if (d->state != ST_INFLATE) goto badarg;
- if (len != 4) goto badarg;
- res = zlib_inflate(d, i32(buf));
- if (res == Z_NEED_DICT) {
- return zlib_value2(3, d->s.adler, rbuf, rlen);
- } else {
- return zlib_return(res, rbuf, rlen);
- }
-
- case INFLATE_CHUNK:
- if (d->state != ST_INFLATE) goto badarg;
- if (len != 0) goto badarg;
- res = zlib_inflate_chunk(d);
- if (res == INFLATE_HAS_MORE) {
- return zlib_value2(4, 0, rbuf, rlen);
- } else if (res == Z_NEED_DICT) {
- return zlib_value2(3, d->s.adler, rbuf, rlen);
- } else {
- return zlib_return(res, rbuf, rlen);
- }
-
- case GET_QSIZE:
- return zlib_value(driver_sizeq(d->port), rbuf, rlen);
-
- case GET_BUFSZ:
- return zlib_value(d->binsz_need, rbuf, rlen);
-
- case SET_BUFSZ: {
- int need;
- if (len != 4) goto badarg;
- need = i32(buf);
- if ((need < 16) || (need > 0x00ffffff))
- goto badarg;
- if (d->binsz_need != need) {
- d->binsz_need = need;
- if (d->bin != NULL) {
- if (d->s.avail_out == d->binsz) {
- driver_free_binary(d->bin);
- d->bin = NULL;
- d->binsz = 0;
- }
- else
- zlib_output(d);
- }
- }
- return zlib_return(Z_OK, rbuf, rlen);
- }
-
- case CRC32_0:
- return zlib_value(d->crc, rbuf, rlen);
-
- case CRC32_1: {
- uLong crc = crc32(0L, Z_NULL, 0);
- crc = crc32(crc, (unsigned char*) buf, len);
- return zlib_value(crc, rbuf, rlen);
- }
-
- case CRC32_2: {
- uLong crc;
- if (len < 4) goto badarg;
- crc = (unsigned int) i32(buf);
- crc = crc32(crc, (unsigned char*) buf+4, len-4);
- return zlib_value(crc, rbuf, rlen);
- }
-
- case ADLER32_1: {
- uLong adler = adler32(0L, Z_NULL, 0);
- adler = adler32(adler, (unsigned char*) buf, len);
- return zlib_value(adler, rbuf, rlen);
- }
-
- case ADLER32_2: {
- uLong adler;
- if (len < 4) goto badarg;
- adler = (unsigned int) i32(buf);
- adler = adler32(adler, (unsigned char*) buf+4, len-4);
- return zlib_value(adler, rbuf, rlen);
- }
-
- case CRC32_COMBINE: {
- uLong crc, crc1, crc2, len2;
- if (len != 12) goto badarg;
- crc1 = (unsigned int) i32(buf);
- crc2 = (unsigned int) i32(buf+4);
- len2 = (unsigned int) i32(buf+8);
- crc = crc32_combine(crc1, crc2, len2);
- return zlib_value(crc, rbuf, rlen);
- }
-
- case ADLER32_COMBINE: {
- uLong adler, adler1, adler2, len2;
- if (len != 12) goto badarg;
- adler1 = (unsigned int) i32(buf);
- adler2 = (unsigned int) i32(buf+4);
- len2 = (unsigned int) i32(buf+8);
- adler = adler32_combine(adler1, adler2, len2);
- return zlib_value(adler, rbuf, rlen);
- }
- }
-
- badarg:
- errno = EINVAL;
- return zlib_return(Z_ERRNO, rbuf, rlen);
-}
-
-
-
-static void zlib_outputv(ErlDrvData drv_data, ErlIOVec *ev)
-{
- ZLibData* d = (ZLibData*) drv_data;
-
- driver_enqv(d->port, ev, 0);
-}
diff --git a/erts/emulator/nifs/common/zlib_nif.c b/erts/emulator/nifs/common/zlib_nif.c
new file mode 100644
index 0000000000..b7f3adaffe
--- /dev/null
+++ b/erts/emulator/nifs/common/zlib_nif.c
@@ -0,0 +1,1019 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson 2017. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#define STATIC_ERLANG_NIF 1
+
+#include <stdio.h>
+#include <zlib.h>
+
+#include "erl_nif.h"
+#include "config.h"
+#include "sys.h"
+
+#ifdef VALGRIND
+# include <valgrind/memcheck.h>
+#endif
+
+#define INFL_DICT_SZ (32768)
+
+#ifndef MAX
+#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
+#endif
+
+#ifndef MIN
+#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
+#endif
+
+/* NIF interface declarations */
+static int load(ErlNifEnv *env, void** priv_data, ERL_NIF_TERM load_info);
+static int upgrade(ErlNifEnv *env, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info);
+static void unload(ErlNifEnv *env, void* priv_data);
+
+static ErlNifResourceType *rtype_zlib;
+
+static ERL_NIF_TERM am_not_on_controlling_process;
+
+static ERL_NIF_TERM am_not_initialized;
+static ERL_NIF_TERM am_already_initialized;
+
+static ERL_NIF_TERM am_ok;
+static ERL_NIF_TERM am_error;
+
+static ERL_NIF_TERM am_continue;
+static ERL_NIF_TERM am_finished;
+
+static ERL_NIF_TERM am_not_supported;
+static ERL_NIF_TERM am_need_dictionary;
+
+static ERL_NIF_TERM am_empty;
+
+static ERL_NIF_TERM am_stream_end;
+static ERL_NIF_TERM am_stream_error;
+static ERL_NIF_TERM am_data_error;
+static ERL_NIF_TERM am_mem_error;
+static ERL_NIF_TERM am_buf_error;
+static ERL_NIF_TERM am_version_error;
+static ERL_NIF_TERM am_unknown_error;
+
+typedef enum {
+ ST_NONE = 0,
+ ST_DEFLATE = 1,
+ ST_INFLATE = 2,
+ ST_CLOSED = 3
+} zlib_state;
+
+typedef struct {
+ z_stream s;
+ zlib_state state;
+
+ /* These refer to the plaintext CRC, and are only needed for zlib:crc32/1
+ * which is deprecated. */
+ uLong input_crc;
+ uLong output_crc;
+ int want_input_crc;
+ int want_output_crc;
+
+ int is_raw_stream;
+
+ int eos_seen;
+
+ /* DEPRECATED */
+ int inflateChunk_buffer_size;
+
+ ErlNifPid controlling_process;
+
+ ErlNifIOQueue *input_queue;
+
+ ErlNifEnv *stash_env;
+ ERL_NIF_TERM stash_term;
+} zlib_data_t;
+
+/* The NIFs: */
+
+static ERL_NIF_TERM zlib_open(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_close(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateInit(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateInit2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateSetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateReset(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateEnd(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflateParams(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_deflate(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM zlib_inflateInit(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflateInit2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflateSetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflateGetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflateReset(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflateEnd(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_inflate(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM zlib_crc32(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM zlib_clearStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_setStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_getStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM zlib_getBufSize(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM zlib_setBufSize(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM zlib_enqueue_input(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
+static ErlNifFunc nif_funcs[] = {
+ /* deflate */
+ {"deflateInit_nif", 2, zlib_deflateInit},
+ {"deflateInit_nif", 6, zlib_deflateInit2},
+ {"deflateSetDictionary_nif", 2, zlib_deflateSetDictionary},
+ {"deflateReset_nif", 1, zlib_deflateReset},
+ {"deflateEnd_nif", 1, zlib_deflateEnd},
+ {"deflateParams_nif", 3, zlib_deflateParams},
+ {"deflate_nif", 4, zlib_deflate},
+
+ /* inflate */
+ {"inflateInit_nif", 1, zlib_inflateInit},
+ {"inflateInit_nif", 2, zlib_inflateInit2},
+ {"inflateSetDictionary_nif", 2, zlib_inflateSetDictionary},
+ {"inflateGetDictionary_nif", 1, zlib_inflateGetDictionary},
+ {"inflateReset_nif", 1, zlib_inflateReset},
+ {"inflateEnd_nif", 1, zlib_inflateEnd},
+ {"inflate_nif", 4, zlib_inflate},
+
+ /* running checksum */
+ {"crc32_nif", 1, zlib_crc32},
+
+ /* open & close */
+ {"close_nif", 1, zlib_close},
+ {"open_nif", 0, zlib_open},
+
+ /* The stash keeps a single term alive across calls, and is used in
+ * exception_on_need_dict/1 to retain the old error behavior, and for
+ * saving data flushed through deflateParams/3. */
+ {"getStash_nif", 1, zlib_getStash},
+ {"clearStash_nif", 1, zlib_clearStash},
+ {"setStash_nif", 2, zlib_setStash},
+
+ /* DEPRECATED: buffer size for inflateChunk */
+ {"getBufSize_nif", 1, zlib_getBufSize},
+ {"setBufSize_nif", 2, zlib_setBufSize},
+
+ {"enqueue_nif", 2, zlib_enqueue_input},
+};
+
+ERL_NIF_INIT(zlib, nif_funcs, load, NULL, upgrade, unload)
+
+static void gc_zlib(ErlNifEnv *env, void* data);
+
+static int load(ErlNifEnv *env, void** priv_data, ERL_NIF_TERM load_info)
+{
+ am_not_on_controlling_process =
+ enif_make_atom(env, "not_on_controlling_process");
+
+ am_not_initialized = enif_make_atom(env, "not_initialized");
+ am_already_initialized = enif_make_atom(env, "already_initialized");
+
+ am_ok = enif_make_atom(env, "ok");
+ am_error = enif_make_atom(env, "error");
+
+ am_continue = enif_make_atom(env, "continue");
+ am_finished = enif_make_atom(env, "finished");
+
+ am_not_supported = enif_make_atom(env, "not_supported");
+ am_need_dictionary = enif_make_atom(env, "need_dictionary");
+
+ am_empty = enif_make_atom(env, "empty");
+
+ am_stream_end = enif_make_atom(env, "stream_end");
+ am_stream_error = enif_make_atom(env, "stream_error");
+ am_data_error = enif_make_atom(env, "data_error");
+ am_mem_error = enif_make_atom(env, "mem_error");
+ am_buf_error = enif_make_atom(env, "buf_error");
+ am_version_error = enif_make_atom(env, "version_error");
+ am_unknown_error = enif_make_atom(env, "unknown_error");
+
+ rtype_zlib = enif_open_resource_type(env, NULL,
+ "gc_zlib", gc_zlib, ERL_NIF_RT_CREATE, NULL);
+ *priv_data = NULL;
+
+ return 0;
+}
+
+static void unload(ErlNifEnv *env, void* priv_data)
+{
+
+}
+
+static int upgrade(ErlNifEnv *env, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info)
+{
+ if(*old_priv_data != NULL) {
+ return -1; /* Don't know how to do that */
+ }
+ if(*priv_data != NULL) {
+ return -1; /* Don't know how to do that */
+ }
+ if(load(env, priv_data, load_info)) {
+ return -1;
+ }
+ return 0;
+}
+
+static void* zlib_alloc(void* data, unsigned int items, unsigned int size)
+{
+ return (void*) enif_alloc(items * size);
+}
+
+static void zlib_free(void* data, void* addr)
+{
+ enif_free(addr);
+}
+
+static ERL_NIF_TERM zlib_return(ErlNifEnv *env, int code) {
+ ERL_NIF_TERM reason;
+ switch(code) {
+ case Z_OK:
+ reason = am_ok;
+ break;
+ case Z_STREAM_END:
+ reason = am_stream_end;
+ break;
+ case Z_ERRNO:
+ reason = enif_make_int(env, errno);
+ break;
+ case Z_STREAM_ERROR:
+ reason = enif_raise_exception(env, am_stream_error);
+ break;
+ case Z_DATA_ERROR:
+ reason = enif_raise_exception(env, am_data_error);
+ break;
+ case Z_MEM_ERROR:
+ reason = am_mem_error;
+ break;
+ case Z_BUF_ERROR:
+ reason = am_buf_error;
+ break;
+ case Z_VERSION_ERROR:
+ reason = am_version_error;
+ break;
+ default:
+ reason = am_unknown_error;
+ break;
+ }
+ return reason;
+}
+
+static void gc_zlib(ErlNifEnv *env, void* data) {
+ zlib_data_t *d = (zlib_data_t*)data;
+
+ if(d->state == ST_DEFLATE) {
+ deflateEnd(&d->s);
+ } else if(d->state == ST_INFLATE) {
+ inflateEnd(&d->s);
+ }
+
+ if(d->state != ST_CLOSED) {
+ enif_ioq_destroy(d->input_queue);
+
+ if(d->stash_env != NULL) {
+ enif_free_env(d->stash_env);
+ }
+
+ d->state = ST_CLOSED;
+ }
+}
+
+static int get_zlib_data(ErlNifEnv *env, ERL_NIF_TERM opaque, zlib_data_t **d) {
+ return enif_get_resource(env, opaque, rtype_zlib, (void **)d);
+}
+
+static int zlib_process_check(ErlNifEnv *env, zlib_data_t *d) {
+ ErlNifPid current_process;
+
+ enif_self(env, &current_process);
+
+ return enif_is_identical(enif_make_pid(env, &current_process),
+ enif_make_pid(env, &d->controlling_process));
+}
+
+static void zlib_reset_input(zlib_data_t *d) {
+ enif_ioq_destroy(d->input_queue);
+ d->input_queue = enif_ioq_create(ERL_NIF_IOQ_NORMAL);
+
+ if(d->stash_env != NULL) {
+ enif_free_env(d->stash_env);
+ d->stash_env = NULL;
+ d->stash_term = NIL;
+ }
+}
+
+static int zlib_flush_queue(int (*codec)(z_stream*, int), ErlNifEnv *env,
+ zlib_data_t *d, size_t input_limit, ErlNifBinary *output_buffer, int flush,
+ size_t *bytes_produced, size_t *bytes_consumed, size_t *bytes_remaining) {
+
+ int vec_len, vec_idx;
+ SysIOVec *input_vec;
+ int res;
+
+ input_vec = enif_ioq_peek(d->input_queue, &vec_len);
+ vec_idx = 0;
+ res = Z_OK;
+
+ *bytes_produced = 0;
+ *bytes_consumed = 0;
+
+ d->s.avail_out = output_buffer->size;
+ d->s.next_out = output_buffer->data;
+
+ while(res == Z_OK && vec_idx < vec_len && *bytes_consumed < input_limit) {
+ size_t timeslice_percent, block_consumed, block_size;
+
+ block_size = MIN(input_vec[vec_idx].iov_len, input_limit);
+
+ d->s.next_in = input_vec[vec_idx].iov_base;
+ d->s.avail_in = block_size;
+
+ res = codec(&d->s, Z_NO_FLUSH);
+
+ ASSERT(d->s.avail_in == 0 || d->s.avail_out == 0 || res != Z_OK);
+
+ block_consumed = block_size - d->s.avail_in;
+ *bytes_consumed += block_consumed;
+
+ if(d->want_input_crc) {
+ d->input_crc =
+ crc32(d->input_crc, input_vec[vec_idx].iov_base, block_consumed);
+ }
+
+ timeslice_percent = (100 * block_consumed) / input_limit;
+ if(enif_consume_timeslice(env, MAX(1, timeslice_percent))) {
+ break;
+ }
+
+ vec_idx++;
+ }
+
+ if(!enif_ioq_deq(d->input_queue, *bytes_consumed, bytes_remaining)) {
+ *bytes_remaining = 0;
+ res = Z_BUF_ERROR;
+ }
+
+ if(res == Z_OK && flush != Z_NO_FLUSH && (*bytes_remaining == 0)) {
+ d->s.next_in = NULL;
+ d->s.avail_in = 0;
+
+ res = codec(&d->s, flush);
+ }
+
+ *bytes_produced = output_buffer->size - d->s.avail_out;
+
+ return res;
+}
+
+static ERL_NIF_TERM zlib_codec(int (*codec)(z_stream*, int),
+ ErlNifEnv *env, zlib_data_t *d,
+ int input_chunk_size,
+ int output_chunk_size,
+ int flush) {
+
+ size_t bytes_produced, bytes_consumed, bytes_remaining;
+ ErlNifBinary output_buffer;
+ int res;
+
+ if(!enif_alloc_binary(output_chunk_size, &output_buffer)) {
+ return zlib_return(env, Z_MEM_ERROR);
+ }
+
+ res = zlib_flush_queue(codec, env, d, input_chunk_size, &output_buffer,
+ flush, &bytes_produced, &bytes_consumed, &bytes_remaining);
+
+ if(res < 0 && res != Z_BUF_ERROR) {
+ enif_release_binary(&output_buffer);
+ return zlib_return(env, res);
+ }
+
+ if(res == Z_STREAM_END) {
+ d->eos_seen = 1;
+ }
+
+ if(d->want_output_crc) {
+ d->output_crc =
+ crc32(d->output_crc, output_buffer.data, bytes_produced);
+ }
+
+ if(bytes_consumed == 0 && bytes_produced == 0 && bytes_remaining != 0) {
+ /* Die if we've made zero progress; this should not happen on
+ * well-formed input. */
+
+ enif_release_binary(&output_buffer);
+ return zlib_return(env, Z_DATA_ERROR);
+ } else {
+ ERL_NIF_TERM flushed_output;
+
+ if(bytes_produced > 0) {
+ if(bytes_produced < output_buffer.size) {
+ enif_realloc_binary(&output_buffer, bytes_produced);
+ }
+
+ flushed_output =
+ enif_make_list1(env, enif_make_binary(env, &output_buffer));
+ } else {
+ enif_release_binary(&output_buffer);
+ flushed_output = enif_make_list(env, 0);
+ }
+
+ if(bytes_remaining == 0 && bytes_produced < output_chunk_size) {
+ return enif_make_tuple2(env, am_finished, flushed_output);
+ } else if(res != Z_NEED_DICT) {
+ return enif_make_tuple2(env, am_continue, flushed_output);
+ }
+
+ return enif_make_tuple3(env, am_need_dictionary,
+ enif_make_int(env, d->s.adler), flushed_output);
+ }
+}
+
+/* zlib nifs */
+
+static ERL_NIF_TERM zlib_getStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ }
+
+ if(d->stash_env == NULL) {
+ return am_empty;
+ }
+
+ return enif_make_tuple2(env, am_ok, enif_make_copy(env, d->stash_term));
+}
+
+static ERL_NIF_TERM zlib_clearStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->stash_env == NULL) {
+ return enif_raise_exception(env, am_error);
+ }
+
+ enif_free_env(d->stash_env);
+ d->stash_env = NULL;
+ d->stash_term = NIL;
+
+ return am_ok;
+}
+
+static ERL_NIF_TERM zlib_setStash(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->stash_env != NULL) {
+ return enif_raise_exception(env, am_error);
+ }
+
+ d->stash_env = enif_alloc_env();
+ d->stash_term = enif_make_copy(d->stash_env, argv[1]);
+
+ return am_ok;
+}
+
+static ERL_NIF_TERM zlib_open(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ ERL_NIF_TERM result;
+
+ d = (zlib_data_t *) enif_alloc_resource(rtype_zlib, sizeof(zlib_data_t));
+
+ memset(&d->s, 0, sizeof(z_stream));
+
+ enif_self(env, &d->controlling_process);
+
+ d->input_queue = enif_ioq_create(ERL_NIF_IOQ_NORMAL);
+
+ d->s.zalloc = zlib_alloc;
+ d->s.zfree = zlib_free;
+ d->s.opaque = d;
+ d->s.data_type = Z_BINARY;
+
+ d->state = ST_NONE;
+ d->eos_seen = 0;
+
+ d->want_output_crc = 0;
+ d->want_input_crc = 0;
+ d->is_raw_stream = 0;
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->input_crc = crc32(0L, Z_NULL, 0);
+
+ d->stash_env = NULL;
+ d->stash_term = NIL;
+
+ d->inflateChunk_buffer_size = 4000;
+
+ result = enif_make_resource(env, d);
+ enif_release_resource(d);
+
+ return result;
+}
+
+static ERL_NIF_TERM zlib_close(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ /* strictly speaking not needed since the gc will handle this */
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state == ST_CLOSED) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ gc_zlib(env, d);
+
+ return am_ok;
+}
+
+/* deflate */
+
+static ERL_NIF_TERM zlib_deflateInit(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int level, res;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d) ||
+ !enif_get_int(env, argv[1], &level)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_NONE) {
+ return enif_raise_exception(env, am_already_initialized);
+ }
+
+ res = deflateInit(&d->s, level);
+
+ if(res == Z_OK) {
+ d->state = ST_DEFLATE;
+ d->eos_seen = 0;
+
+ /* FIXME: crc32/1 is documented as returning "the current calculated
+ * checksum," but failed to mention that the old implementation only
+ * calculated it when WindowBits < 0 (See zlib_deflateInit2).
+ *
+ * We could fix this behavior by setting d->want_input_crc to 1 here,
+ * but we've decided to retain this quirk since the performance hit is
+ * quite significant. */
+ d->want_output_crc = 0;
+ d->want_input_crc = 0;
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->input_crc = crc32(0L, Z_NULL, 0);
+ }
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflateInit2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int level, method, windowBits, memLevel, strategy, res;
+
+ if(argc != 6 || !get_zlib_data(env, argv[0], &d)
+ || !enif_get_int(env, argv[1], &level)
+ || !enif_get_int(env, argv[2], &method)
+ || !enif_get_int(env, argv[3], &windowBits)
+ || !enif_get_int(env, argv[4], &memLevel)
+ || !enif_get_int(env, argv[5], &strategy)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_NONE) {
+ return enif_raise_exception(env, am_already_initialized);
+ }
+
+ res = deflateInit2(&d->s, level, method, windowBits, memLevel, strategy);
+
+ if(res == Z_OK) {
+ d->state = ST_DEFLATE;
+ d->eos_seen = 0;
+
+ d->is_raw_stream = (windowBits < 0);
+
+ d->want_output_crc = 0;
+ d->want_input_crc = d->is_raw_stream;
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->input_crc = crc32(0L, Z_NULL, 0);
+ }
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflateSetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ ErlNifBinary bin;
+ int res;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &bin)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ if((res = deflateSetDictionary(&d->s, bin.data, bin.size)) == Z_OK) {
+ uLong checksum = d->s.adler;
+
+ /* d->s.adler is not updated in raw deflate mode, so we'll calculate it
+ * ourselves in case the user wants to rely on that behavior. */
+ if(d->is_raw_stream) {
+ checksum = adler32(0, bin.data, bin.size);
+ }
+
+ return enif_make_int(env, checksum);
+ }
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflateReset(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ res = deflateReset(&d->s);
+
+ d->input_crc = crc32(0L, Z_NULL, 0);
+ d->eos_seen = 0;
+
+ zlib_reset_input(d);
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflateEnd(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ res = deflateEnd(&d->s);
+
+ if(res == Z_OK && enif_ioq_size(d->input_queue) > 0) {
+ res = Z_DATA_ERROR;
+ }
+
+ zlib_reset_input(d);
+ d->state = ST_NONE;
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflateParams(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res, level, strategy;
+
+ if(argc != 3 || !get_zlib_data(env, argv[0], &d)
+ || !enif_get_int(env, argv[1], &level)
+ || !enif_get_int(env, argv[2], &strategy)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ /* deflateParams will flush everything currently in the stream, corrupting
+ * the heap unless it's empty. We therefore pretend to have a full output
+ * buffer, forcing a Z_BUF_ERROR if there's anything left to be flushed. */
+ d->s.avail_out = 0;
+ res = deflateParams(&d->s, level, strategy);
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_deflate(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ int input_chunk_size, output_chunk_size, flush;
+
+ if(argc != 4 || !get_zlib_data(env, argv[0], &d)
+ || !enif_get_int(env, argv[1], &input_chunk_size)
+ || !enif_get_int(env, argv[2], &output_chunk_size)
+ || !enif_get_int(env, argv[3], &flush)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ return zlib_codec(&deflate, env, d, input_chunk_size, output_chunk_size, flush);
+}
+
+/* inflate */
+
+static ERL_NIF_TERM zlib_inflateInit(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_NONE) {
+ return enif_raise_exception(env, am_already_initialized);
+ }
+
+ res = inflateInit(&d->s);
+
+ if(res == Z_OK) {
+ d->state = ST_INFLATE;
+ d->eos_seen = 0;
+
+ d->want_output_crc = 0;
+ d->want_input_crc = 0;
+ d->is_raw_stream = 0;
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->input_crc = crc32(0L, Z_NULL, 0);
+ }
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_inflateInit2(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int windowBits, res;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)
+ || !enif_get_int(env, argv[1], &windowBits)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_NONE) {
+ return enif_raise_exception(env, am_already_initialized);
+ }
+
+ res = inflateInit2(&d->s, windowBits);
+
+ if(res == Z_OK) {
+ d->state = ST_INFLATE;
+ d->eos_seen = 0;
+
+ d->is_raw_stream = (windowBits < 0);
+
+ d->want_output_crc = d->is_raw_stream;
+ d->want_input_crc = 0;
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->input_crc = crc32(0L, Z_NULL, 0);
+ }
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_inflateSetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ ErlNifBinary bin;
+ int res;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &bin)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ res = inflateSetDictionary(&d->s, bin.data, bin.size);
+
+ return zlib_return(env, res);
+}
+
+#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
+/* Work around broken build system with runtime version test */
+static int zlib_supports_inflateGetDictionary(void) {
+ static int supportsGetDictionary = -1;
+
+#if defined(__APPLE__) && defined(__MACH__)
+ if(supportsGetDictionary < 0) {
+ unsigned int v[4] = {0, 0, 0, 0};
+ unsigned hexver;
+
+ sscanf(zlibVersion(), "%u.%u.%u.%u", &v[0], &v[1], &v[2], &v[3]);
+
+ hexver = (v[0] << (8*3)) | (v[1] << (8*2)) | (v[2] << (8)) | v[3];
+ supportsGetDictionary = (hexver >= 0x1020701); /* 1.2.7.1 */
+ }
+#endif
+
+ return supportsGetDictionary;
+}
+#endif
+
+static ERL_NIF_TERM zlib_inflateGetDictionary(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+#ifdef HAVE_ZLIB_INFLATEGETDICTIONARY
+ if(zlib_supports_inflateGetDictionary()) {
+ ErlNifBinary obin;
+ uInt len;
+ int res;
+
+ enif_alloc_binary(INFL_DICT_SZ, &obin);
+ len = 0;
+
+ if((res = inflateGetDictionary(&d->s, obin.data, &len)) < 0) {
+ enif_release_binary(&obin);
+ return zlib_return(env, res);
+ }
+
+ enif_realloc_binary(&obin, (size_t)len);
+ return enif_make_binary(env, &obin);
+ }
+#endif
+
+ return enif_raise_exception(env, am_not_supported);
+}
+
+static ERL_NIF_TERM zlib_inflateReset(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ res = inflateReset(&d->s);
+
+ d->output_crc = crc32(0L, Z_NULL, 0);
+ d->eos_seen = 0;
+
+ zlib_reset_input(d);
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_inflateEnd(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+ int res;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ res = inflateEnd(&d->s);
+
+ if(res == Z_OK && (!d->eos_seen || enif_ioq_size(d->input_queue) > 0)) {
+ res = Z_DATA_ERROR;
+ }
+
+ zlib_reset_input(d);
+ d->state = ST_NONE;
+
+ return zlib_return(env, res);
+}
+
+static ERL_NIF_TERM zlib_inflate(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ int input_chunk_size, output_chunk_size, flush;
+
+ if(argc != 4 || !get_zlib_data(env, argv[0], &d)
+ || !enif_get_int(env, argv[1], &input_chunk_size)
+ || !enif_get_int(env, argv[2], &output_chunk_size)
+ || !enif_get_int(env, argv[3], &flush)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ return zlib_codec(&inflate, env, d, input_chunk_size, output_chunk_size, flush);
+}
+
+static ERL_NIF_TERM zlib_crc32(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ }
+
+ if(d->state == ST_DEFLATE) {
+ return enif_make_ulong(env, d->input_crc);
+ } else if(d->state == ST_INFLATE) {
+ return enif_make_ulong(env, d->output_crc);
+ }
+
+ return enif_raise_exception(env, am_not_initialized);
+}
+
+static ERL_NIF_TERM zlib_getBufSize(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 1 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ }
+
+ return enif_make_int(env, d->inflateChunk_buffer_size);
+}
+
+static ERL_NIF_TERM zlib_setBufSize(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ }
+
+ if(!enif_get_int(env, argv[1], &d->inflateChunk_buffer_size)) {
+ return enif_make_badarg(env);
+ }
+
+ return am_ok;
+}
+
+static ERL_NIF_TERM zlib_enqueue_input(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) {
+ zlib_data_t *d;
+
+ ErlNifIOVec prealloc, *iovec = &prealloc;
+ ERL_NIF_TERM tail;
+
+ if(argc != 2 || !get_zlib_data(env, argv[0], &d)) {
+ return enif_make_badarg(env);
+ } else if(!zlib_process_check(env, d)) {
+ return enif_raise_exception(env, am_not_on_controlling_process);
+ } else if(d->state != ST_DEFLATE && d->state != ST_INFLATE) {
+ return enif_raise_exception(env, am_not_initialized);
+ }
+
+ if(!enif_inspect_iovec(env, 256, argv[1], &tail, &iovec)) {
+ return enif_make_badarg(env);
+ } else if(!enif_ioq_enqv(d->input_queue, iovec, 0)) {
+ return enif_make_badarg(env);
+ }
+
+ if(!enif_is_empty_list(env, tail)) {
+ return enif_make_tuple2(env, am_continue, tail);
+ }
+
+ return am_ok;
+}
diff --git a/erts/preloaded/ebin/init.beam b/erts/preloaded/ebin/init.beam
index 2acb1f1211..1c8d0e626a 100644
--- a/erts/preloaded/ebin/init.beam
+++ b/erts/preloaded/ebin/init.beam
Binary files differ
diff --git a/erts/preloaded/ebin/zlib.beam b/erts/preloaded/ebin/zlib.beam
index a959ebaaf2..267b5cb0a8 100644
--- a/erts/preloaded/ebin/zlib.beam
+++ b/erts/preloaded/ebin/zlib.beam
Binary files differ
diff --git a/erts/preloaded/src/init.erl b/erts/preloaded/src/init.erl
index 1ccf8d599f..34a9f6b8b9 100644
--- a/erts/preloaded/src/init.erl
+++ b/erts/preloaded/src/init.erl
@@ -200,6 +200,8 @@ boot(BootArgs) ->
register(init, self()),
process_flag(trap_exit, true),
+ %% Load the zlib nif
+ zlib:on_load(),
%% Load the tracer nif
erl_tracer:on_load(),
diff --git a/erts/preloaded/src/zlib.erl b/erts/preloaded/src/zlib.erl
index 8cd3e39fd7..dca5a42779 100644
--- a/erts/preloaded/src/zlib.erl
+++ b/erts/preloaded/src/zlib.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2003-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -21,19 +21,29 @@
-module(zlib).
-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,
- inflateSetDictionary/2,inflateGetDictionary/1,
- inflateSync/1,inflateReset/1,inflate/2,inflateEnd/1,
- inflateChunk/1, inflateChunk/2,
- setBufSize/2,getBufSize/1,
- crc32/1,crc32/2,crc32/3,adler32/2,adler32/3,getQSize/1,
- crc32_combine/4,adler32_combine/4,
- compress/1,uncompress/1,zip/1,unzip/1,
- gzip/1,gunzip/1]).
-
--export_type([zstream/0, zlevel/0, zwindowbits/0, zmemlevel/0, zstrategy/0]).
+ deflateSetDictionary/2,deflateReset/1,deflateParams/3,
+ deflate/2,deflate/3,deflateEnd/1,
+ inflateInit/1,inflateInit/2,
+ inflateSetDictionary/2,inflateGetDictionary/1, inflateReset/1,
+ inflate/2,inflate/3,inflateEnd/1,
+ inflateChunk/2,inflateChunk/1,
+ safeInflate/2,
+ setBufSize/2,getBufSize/1,
+ crc32/1,crc32/2,crc32/3,adler32/2,adler32/3,
+ crc32_combine/4,adler32_combine/4,
+ compress/1,uncompress/1,zip/1,unzip/1,
+ gzip/1,gunzip/1]).
+
+-export([on_load/0]).
+
+%% These are soft-deprecated until OTP 21.
+% -deprecated([inflateChunk/1, inflateChunk/2,
+% getBufSize/1, setBufSize/2,
+% crc32/1,crc32/2,crc32/3,adler32/2,adler32/3,
+% crc32_combine/4,adler32_combine/4]).
+
+-export_type([zstream/0, zflush/0, zlevel/0, zwindowbits/0, zmemlevel/0,
+ zstrategy/0]).
%% flush argument encoding
-define(Z_NO_FLUSH, 0).
@@ -56,116 +66,76 @@
%% deflate compression method
-define(Z_DEFLATED, 8).
--define(Z_NULL, 0).
-
-define(MAX_WBITS, 15).
-%% gzip defs (rfc 1952)
-
--define(ID1, 16#1f).
--define(ID2, 16#8b).
-
--define(FTEXT, 16#01).
--define(FHCRC, 16#02).
--define(FEXTRA, 16#04).
--define(FNAME, 16#08).
--define(FCOMMENT, 16#10).
--define(RESERVED, 16#E0).
-
--define(OS_MDDOS, 0).
--define(OS_AMIGA, 1).
--define(OS_OPENVMS, 2).
--define(OS_UNIX, 3).
--define(OS_VMCMS, 4).
--define(OS_ATARI, 5).
--define(OS_OS2, 6).
--define(OS_MAC, 7).
--define(OS_ZSYS, 8).
--define(OS_CPM, 9).
--define(OS_TOP20, 10).
--define(OS_NTFS, 11).
--define(OS_QDOS, 12).
--define(OS_ACORN, 13).
--define(OS_UNKNOWN,255).
-
--define(DEFLATE_INIT, 1).
--define(DEFLATE_INIT2, 2).
--define(DEFLATE_SETDICT, 3).
--define(DEFLATE_RESET, 4).
--define(DEFLATE_END, 5).
--define(DEFLATE_PARAMS, 6).
--define(DEFLATE, 7).
-
--define(INFLATE_INIT, 8).
--define(INFLATE_INIT2, 9).
--define(INFLATE_SETDICT, 10).
--define(INFLATE_GETDICT, 11).
--define(INFLATE_SYNC, 12).
--define(INFLATE_RESET, 13).
--define(INFLATE_END, 14).
--define(INFLATE, 15).
--define(INFLATE_CHUNK, 26).
-
--define(CRC32_0, 16).
--define(CRC32_1, 17).
--define(CRC32_2, 18).
-
--define(SET_BUFSZ, 19).
--define(GET_BUFSZ, 20).
--define(GET_QSIZE, 21).
-
--define(ADLER32_1, 22).
--define(ADLER32_2, 23).
-
--define(CRC32_COMBINE, 24).
--define(ADLER32_COMBINE, 25).
+%% 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.
+-define(DEFLATE_IN_CHUNKSIZE, 8 bsl 10).
+-define(DEFLATE_OUT_CHUNKSIZE, 8 bsl 10).
+-define(INFLATE_IN_CHUNKSIZE, 8 bsl 10).
+-define(INFLATE_OUT_CHUNKSIZE, 16 bsl 10).
%%------------------------------------------------------------------------
-%% Main data types of the file
--type zstream() :: port().
+%% Public data types.
+-type zstream() :: term().
+-type zflush() :: 'none' | 'sync' | 'full' | 'finish'.
-%% Auxiliary data types of the file
--type zlevel() :: 'none' | 'default' | 'best_compression' | 'best_speed'
- | 0..9.
--type zmethod() :: 'deflated'.
+-type zlevel() ::
+ 'none' | 'default' | 'best_compression' | 'best_speed' | 0..9.
+-type zstrategy() :: 'default' | 'filtered' | 'huffman_only' | 'rle'.
+
+-type zmemlevel() :: 1..9.
-type zwindowbits() :: -15..-8 | 8..47.
--type zmemlevel() :: 1..9.
--type zstrategy() :: 'default' | 'filtered' | 'huffman_only' | 'rle'.
+
+%% Private data types.
+
+-type zmethod() :: 'deflated'.
+
+-record(zlib_opts, {
+ stream :: zstream(),
+ method :: term(),
+ input_chunk_size :: integer(),
+ output_chunk_size :: integer(),
+ flush :: integer()
+ }).
%%------------------------------------------------------------------------
-%% open a z_stream
+on_load() ->
+ case erlang:load_nif(atom_to_list(?MODULE), 0) of
+ ok -> ok
+ end.
+
-spec open() -> zstream().
open() ->
- open_port({spawn, "zlib_drv"}, [binary]).
+ open_nif().
+open_nif() ->
+ erlang:nif_error(undef).
-%% close and release z_stream
-spec close(Z) -> 'ok' when
Z :: zstream().
close(Z) ->
- try
- true = port_close(Z),
- receive %In case the caller is the owner and traps exits
- {'EXIT',Z,_} -> ok
- after 0 -> ok
- end
- catch _:_ -> erlang:error(badarg)
- end.
+ close_nif(Z).
+close_nif(_Z) ->
+ erlang:nif_error(undef).
-spec deflateInit(Z) -> 'ok' when
Z :: zstream().
deflateInit(Z) ->
- call(Z, ?DEFLATE_INIT, <<?Z_DEFAULT_COMPRESSION:32>>).
+ deflateInit(Z, default).
-spec deflateInit(Z, Level) -> 'ok' when
Z :: zstream(),
Level :: zlevel().
deflateInit(Z, Level) ->
- call(Z, ?DEFLATE_INIT, <<(arg_level(Level)):32>>).
+ deflateInit_nif(Z, arg_level(Level)).
+
+deflateInit_nif(_Z, _Level) ->
+ erlang:nif_error(undef).
--spec deflateInit(Z, Level, Method,
- WindowBits, MemLevel, Strategy) -> 'ok' when
+-spec deflateInit(Z, Level, Method, WindowBits, MemLevel, Strategy) -> 'ok' when
Z :: zstream(),
Level :: zlevel(),
Method :: zmethod(),
@@ -173,31 +143,49 @@ deflateInit(Z, Level) ->
MemLevel :: zmemlevel(),
Strategy :: zstrategy().
deflateInit(Z, Level, Method, WindowBits, MemLevel, Strategy) ->
- call(Z, ?DEFLATE_INIT2, <<(arg_level(Level)):32,
- (arg_method(Method)):32,
- (arg_bitsz(WindowBits)):32,
- (arg_mem(MemLevel)):32,
- (arg_strategy(Strategy)):32>>).
+ deflateInit_nif(Z,
+ arg_level(Level),
+ arg_method(Method),
+ arg_bitsz(WindowBits),
+ arg_mem(MemLevel),
+ arg_strategy(Strategy)).
+deflateInit_nif(_Z, _Level, _Method, _WindowBits, _MemLevel, _Strategy) ->
+ erlang:nif_error(undef).
-spec deflateSetDictionary(Z, Dictionary) -> Adler32 when
Z :: zstream(),
Dictionary :: iodata(),
Adler32 :: integer().
deflateSetDictionary(Z, Dictionary) ->
- call(Z, ?DEFLATE_SETDICT, Dictionary).
+ deflateSetDictionary_nif(Z, Dictionary).
+deflateSetDictionary_nif(_Z, _Dictionary) ->
+ erlang:nif_error(undef).
-spec deflateReset(Z) -> 'ok' when
Z :: zstream().
deflateReset(Z) ->
- call(Z, ?DEFLATE_RESET, []).
+ deflateReset_nif(Z).
+deflateReset_nif(_Z) ->
+ erlang:nif_error(undef).
-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>>).
+deflateParams(Z, Level0, Strategy0) ->
+ Level = arg_level(Level0),
+ Strategy = arg_strategy(Strategy0),
+ case deflateParams_nif(Z, Level, Strategy) of
+ buf_error ->
+ %% We had data left in the pipe; flush everything and stash it away
+ %% for the next deflate call before trying again.
+ Output = deflate(Z, <<>>, full),
+ save_progress(Z, deflate, Output),
+ deflateParams_nif(Z, Level, Strategy);
+ Any -> Any
+ end.
+deflateParams_nif(_Z, _Level, _Strategy) ->
+ erlang:nif_error(undef).
-spec deflate(Z, Data) -> Compressed when
Z :: zstream(),
@@ -209,170 +197,234 @@ deflate(Z, Data) ->
-spec deflate(Z, Data, Flush) -> Compressed when
Z :: zstream(),
Data :: iodata(),
- Flush :: none | sync | full | finish,
+ Flush :: zflush(),
Compressed :: iolist().
deflate(Z, Data, Flush) ->
- try port_command(Z, Data) of
- true ->
- _ = call(Z, ?DEFLATE, <<(arg_flush(Flush)):32>>),
- collect(Z)
- catch
- error:_Err ->
- flush(Z),
- erlang:error(badarg)
- end.
+ Progress = restore_progress(Z, deflate),
+ enqueue_input(Z, Data),
+ append_iolist(Progress, dequeue_all_chunks(Z, deflate_opts(Flush))).
+
+deflate_opts(Flush) ->
+ #zlib_opts{
+ method = fun deflate_nif/4,
+ input_chunk_size = ?DEFLATE_IN_CHUNKSIZE,
+ output_chunk_size = ?DEFLATE_OUT_CHUNKSIZE,
+ flush = arg_flush(Flush)
+ }.
+
+deflate_nif(_Z, _InputChSize, _OutputChSize, _Flush) ->
+ erlang:nif_error(undef).
-spec deflateEnd(Z) -> 'ok' when
Z :: zstream().
deflateEnd(Z) ->
- call(Z, ?DEFLATE_END, []).
+ deflateEnd_nif(Z).
+deflateEnd_nif(_Z) ->
+ erlang:nif_error(undef).
-spec inflateInit(Z) -> 'ok' when
Z :: zstream().
inflateInit(Z) ->
- call(Z, ?INFLATE_INIT, []).
+ inflateInit_nif(Z).
+inflateInit_nif(_Z) ->
+ erlang:nif_error(undef).
-spec inflateInit(Z, WindowBits) -> 'ok' when
Z :: zstream(),
WindowBits :: zwindowbits().
-inflateInit(Z, WindowBits) ->
- call(Z, ?INFLATE_INIT2, <<(arg_bitsz(WindowBits)):32>>).
+inflateInit(Z, WindowBits) ->
+ inflateInit_nif(Z, WindowBits).
+inflateInit_nif(_Z, _WindowBits) ->
+ erlang:nif_error(undef).
-spec inflateSetDictionary(Z, Dictionary) -> 'ok' when
Z :: zstream(),
Dictionary :: iodata().
-inflateSetDictionary(Z, Dictionary) ->
- call(Z, ?INFLATE_SETDICT, Dictionary).
+inflateSetDictionary(Z, Dictionary) ->
+ inflateSetDictionary_nif(Z, Dictionary).
+inflateSetDictionary_nif(_Z, _Dictionary) ->
+ erlang:nif_error(undef).
-spec inflateGetDictionary(Z) -> Dictionary when
Z :: zstream(),
- Dictionary :: iolist().
+ Dictionary :: binary().
inflateGetDictionary(Z) ->
- _ = call(Z, ?INFLATE_GETDICT, []),
- collect(Z).
-
--spec inflateSync(zstream()) -> 'ok'.
-inflateSync(Z) ->
- call(Z, ?INFLATE_SYNC, []).
+ case inflateGetDictionary_nif(Z) of
+ Dictionary when is_binary(Dictionary) ->
+ Dictionary;
+ not_supported ->
+ erlang:error(enotsup)
+ end.
+inflateGetDictionary_nif(_Z) ->
+ erlang:nif_error(undef).
-spec inflateReset(Z) -> 'ok' when
Z :: zstream().
-inflateReset(Z) ->
- call(Z, ?INFLATE_RESET, []).
+inflateReset(Z) ->
+ inflateReset_nif(Z).
+inflateReset_nif(_Z) ->
+ erlang:nif_error(undef).
-spec inflate(Z, Data) -> Decompressed when
Z :: zstream(),
Data :: iodata(),
Decompressed :: iolist().
inflate(Z, Data) ->
- try port_command(Z, Data) of
- true ->
- _ = call(Z, ?INFLATE, <<?Z_NO_FLUSH:32>>),
- collect(Z)
- catch
- error:_Err ->
- flush(Z),
- erlang:error(badarg)
+ inflate(Z, Data, []).
+
+-spec inflate(Z, Data, Options) -> Decompressed when
+ Z :: zstream(),
+ Data :: iodata(),
+ Options :: list({exception_on_need_dict, boolean()}),
+ Decompressed :: iolist() |
+ {need_dictionary,
+ Adler32 :: integer(),
+ Output :: iolist()}.
+inflate(Z, Data, Options) ->
+ enqueue_input(Z, Data),
+ Result = dequeue_all_chunks(Z, inflate_opts()),
+ case proplist_get_value(Options, exception_on_need_dict, true) of
+ true -> exception_on_need_dict(Z, Result);
+ false -> Result
end.
+inflate_nif(_Z, _InputChSize, _OutputChSize, _Flush) ->
+ erlang:nif_error(undef).
+
+inflate_opts() ->
+ #zlib_opts{
+ method = fun inflate_nif/4,
+ input_chunk_size = ?INFLATE_IN_CHUNKSIZE,
+ output_chunk_size = ?INFLATE_OUT_CHUNKSIZE,
+ flush = arg_flush(none)
+ }.
+
-spec inflateChunk(Z, Data) -> Decompressed | {more, Decompressed} when
Z :: zstream(),
Data :: iodata(),
Decompressed :: iolist().
inflateChunk(Z, Data) ->
- try port_command(Z, Data) of
- true ->
- inflateChunk(Z)
- catch
- error:_Err ->
- flush(Z),
- erlang:error(badarg)
- end.
+ enqueue_input(Z, Data),
+ inflateChunk(Z).
-spec inflateChunk(Z) -> Decompressed | {more, Decompressed} when
Z :: zstream(),
Decompressed :: iolist().
inflateChunk(Z) ->
- Status = call(Z, ?INFLATE_CHUNK, []),
- Data = receive
- {Z, {data, Bin}} ->
- Bin
- after 0 ->
- []
- end,
-
- case Status of
- Good when (Good == ok) orelse (Good == stream_end) ->
- Data;
- inflate_has_more ->
- {more, Data}
- end.
+ Opts0 = inflate_opts(),
+ Opts = Opts0#zlib_opts { output_chunk_size = getBufSize(Z) },
+
+ Result0 = dequeue_next_chunk(Z, Opts),
+ Result1 = exception_on_need_dict(Z, Result0),
+ yield_inflateChunk(Z, Result1).
+
+yield_inflateChunk(_Z, {continue, Output}) ->
+ {more, lists:flatten(Output)};
+yield_inflateChunk(_Z, {finished, Output}) ->
+ lists:flatten(Output).
+
+exception_on_need_dict(Z, {need_dictionary, Adler, Output}) ->
+ Progress = restore_progress(Z, inflate),
+ save_progress(Z, inflate, append_iolist(Progress, Output)),
+ erlang:error({need_dictionary, Adler});
+exception_on_need_dict(Z, {Mark, Output}) ->
+ Progress = restore_progress(Z, inflate),
+ {Mark, append_iolist(Progress, Output)};
+exception_on_need_dict(Z, Output) when is_list(Output); is_binary(Output) ->
+ Progress = restore_progress(Z, inflate),
+ append_iolist(Progress, Output).
+
+-spec safeInflate(Z, Data) -> Result when
+ Z :: zstream(),
+ Data :: iodata(),
+ Result :: {continue, Output :: iolist()} |
+ {finished, Output :: iolist()} |
+ {need_dictionary,
+ Adler32 :: integer(),
+ Output :: iolist()}.
+safeInflate(Z, Data) ->
+ enqueue_input(Z, Data),
+ dequeue_next_chunk(Z, inflate_opts()).
-spec inflateEnd(Z) -> 'ok' when
Z :: zstream().
inflateEnd(Z) ->
- call(Z, ?INFLATE_END, []).
+ inflateEnd_nif(Z).
+inflateEnd_nif(_Z) ->
+ erlang:nif_error(undef).
-spec setBufSize(Z, Size) -> 'ok' when
Z :: zstream(),
Size :: non_neg_integer().
-setBufSize(Z, Size) ->
- call(Z, ?SET_BUFSZ, <<Size:32>>).
+setBufSize(Z, Size) when is_integer(Size), Size > 16, Size < (1 bsl 24) ->
+ setBufSize_nif(Z, Size);
+setBufSize(_Z, _Size) ->
+ erlang:error(badarg).
+setBufSize_nif(_Z, _Size) ->
+ erlang:nif_error(undef).
--spec getBufSize(Z) -> Size when
- Z :: zstream(),
- Size :: non_neg_integer().
+-spec getBufSize(Z) -> non_neg_integer() when
+ Z :: zstream().
getBufSize(Z) ->
- call(Z, ?GET_BUFSZ, []).
+ getBufSize_nif(Z).
+getBufSize_nif(_Z) ->
+ erlang:nif_error(undef).
-spec crc32(Z) -> CRC when
Z :: zstream(),
CRC :: integer().
crc32(Z) ->
- call(Z, ?CRC32_0, []).
+ crc32_nif(Z).
+crc32_nif(_Z) ->
+ erlang:nif_error(undef).
-spec crc32(Z, Data) -> CRC when
Z :: zstream(),
Data :: iodata(),
CRC :: integer().
-crc32(Z, Data) ->
- call(Z, ?CRC32_1, Data).
+crc32(Z, Data) when is_reference(Z) ->
+ erlang:crc32(Data);
+crc32(_Z, _Data) ->
+ erlang:error(badarg).
-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]).
+crc32(Z, CRC, Data) when is_reference(Z) ->
+ erlang:crc32(CRC, Data);
+crc32(_Z, _CRC, _Data) ->
+ erlang:error(badarg).
+
+-spec crc32_combine(Z, CRC1, CRC2, Size2) -> CRC when
+ Z :: zstream(),
+ CRC :: integer(),
+ CRC1 :: integer(),
+ CRC2 :: integer(),
+ Size2 :: integer().
+crc32_combine(Z, CRC1, CRC2, Size2) when is_reference(Z) ->
+ erlang:crc32_combine(CRC1, CRC2, Size2);
+crc32_combine(_Z, _CRC1, _CRC2, _Size2) ->
+ erlang:error(badarg).
-spec adler32(Z, Data) -> CheckSum when
Z :: zstream(),
Data :: iodata(),
CheckSum :: integer().
-adler32(Z, Data) ->
- call(Z, ?ADLER32_1, Data).
+adler32(Z, Data) when is_reference(Z) ->
+ erlang:adler32(Data);
+adler32(_Z, _Data) ->
+ erlang:error(badarg).
-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(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) ->
+adler32(Z, Adler, Data) when is_reference(Z) ->
+ erlang:adler32(Adler, Data);
+adler32(_Z, _Adler, _Data) ->
erlang:error(badarg).
-spec adler32_combine(Z, Adler1, Adler2, Size2) -> Adler when
@@ -381,16 +433,11 @@ crc32_combine(_Z, _CRC1, _CRC2, _Len2) ->
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>>);
-adler32_combine(_Z, _Adler1, _Adler2, _Len2) ->
+adler32_combine(Z, Adler1, Adler2, Size2) when is_reference(Z) ->
+ erlang:adler32_combine(Adler1, Adler2, Size2);
+adler32_combine(_Z, _Adler1, _Adler2, _Size2) ->
erlang:error(badarg).
--spec getQSize(zstream()) -> non_neg_integer().
-getQSize(Z) ->
- call(Z, ?GET_QSIZE, []).
-
%% compress/uncompress zlib with header
-spec compress(Data) -> Compressed when
Data :: iodata(),
@@ -398,13 +445,13 @@ getQSize(Z) ->
compress(Data) ->
Z = open(),
Bs = try
- deflateInit(Z, default),
- B = deflate(Z, Data, finish),
- deflateEnd(Z),
- B
- after
- close(Z)
- end,
+ deflateInit(Z, default),
+ B = deflate(Z, Data, finish),
+ deflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs).
-spec uncompress(Data) -> Decompressed when
@@ -416,14 +463,14 @@ uncompress(Data) ->
if
Size >= 8 ->
Z = open(),
- Bs = try
- inflateInit(Z),
- B = inflate(Z, Data),
- inflateEnd(Z),
- B
- after
- close(Z)
- end,
+ Bs = try
+ inflateInit(Z),
+ B = inflate(Z, Data),
+ inflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs);
true ->
erlang:error(data_error)
@@ -440,13 +487,13 @@ uncompress(Data) ->
zip(Data) ->
Z = open(),
Bs = try
- deflateInit(Z, default, deflated, -?MAX_WBITS, 8, default),
- B = deflate(Z, Data, finish),
- deflateEnd(Z),
- B
- after
- close(Z)
- end,
+ deflateInit(Z, default, deflated, -?MAX_WBITS, 8, default),
+ B = deflate(Z, Data, finish),
+ deflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs).
-spec unzip(Data) -> Decompressed when
@@ -455,28 +502,28 @@ zip(Data) ->
unzip(Data) ->
Z = open(),
Bs = try
- inflateInit(Z, -?MAX_WBITS),
- B = inflate(Z, Data),
- inflateEnd(Z),
- B
- after
- close(Z)
- end,
+ inflateInit(Z, -?MAX_WBITS),
+ B = inflate(Z, Data),
+ inflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs).
-
+
-spec gzip(Data) -> Compressed when
Data :: iodata(),
Compressed :: binary().
gzip(Data) ->
Z = open(),
Bs = try
- deflateInit(Z, default, deflated, 16+?MAX_WBITS, 8, default),
- B = deflate(Z, Data, finish),
- deflateEnd(Z),
- B
- after
- close(Z)
- end,
+ deflateInit(Z, default, deflated, 16+?MAX_WBITS, 8, default),
+ B = deflate(Z, Data, finish),
+ deflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs).
-spec gunzip(Data) -> Decompressed when
@@ -485,92 +532,150 @@ gzip(Data) ->
gunzip(Data) ->
Z = open(),
Bs = try
- inflateInit(Z, 16+?MAX_WBITS),
- B = inflate(Z, Data),
- inflateEnd(Z),
- B
- after
- close(Z)
- end,
+ inflateInit(Z, 16+?MAX_WBITS),
+ B = inflate(Z, Data),
+ inflateEnd(Z),
+ B
+ after
+ close(Z)
+ end,
iolist_to_binary(Bs).
--spec collect(zstream()) -> iolist().
-collect(Z) ->
- collect(Z, []).
-
--spec collect(zstream(), iolist()) -> iolist().
-collect(Z, Acc) ->
- receive
- {Z, {data, Bin}} ->
- collect(Z, [Bin|Acc])
- after 0 ->
- reverse(Acc)
+-spec dequeue_all_chunks(Z, Opts) -> Result when
+ Z :: zstream(),
+ Opts :: #zlib_opts{},
+ Result :: {need_dictionary, integer(), iolist()} |
+ iolist().
+dequeue_all_chunks(Z, Opts) ->
+ dequeue_all_chunks_1(Z, Opts, []).
+dequeue_all_chunks_1(Z, Opts, Output) ->
+ case dequeue_next_chunk(Z, Opts) of
+ {need_dictionary, _, _} = NeedDict ->
+ NeedDict;
+ {continue, Chunk} ->
+ dequeue_all_chunks_1(Z, Opts, append_iolist(Output, Chunk));
+ {finished, Chunk} ->
+ append_iolist(Output, Chunk)
end.
--spec flush(zstream()) -> 'ok'.
-flush(Z) ->
- receive
- {Z, {data,_}} ->
- flush(Z)
- after 0 ->
- ok
+-spec dequeue_next_chunk(Z, Opts) -> Result when
+ Z :: zstream(),
+ Opts :: #zlib_opts{},
+ Result :: {need_dictionary, integer(), iolist()} |
+ {continue, iolist()} |
+ {finished, iolist()}.
+dequeue_next_chunk(Z, Opts) ->
+ Method = Opts#zlib_opts.method,
+ IChSz = Opts#zlib_opts.input_chunk_size,
+ OChSz = Opts#zlib_opts.output_chunk_size,
+ Flush = Opts#zlib_opts.flush,
+ Method(Z, IChSz, OChSz, Flush).
+
+-spec append_iolist(IO, D) -> iolist() when
+ IO :: iodata(),
+ D :: iodata().
+append_iolist([], D) when is_list(D) -> D;
+append_iolist([], D) -> [D];
+append_iolist(IO, []) -> IO;
+append_iolist(IO, [D]) -> [IO, D];
+append_iolist(IO, D) -> [IO, D].
+
+%% inflate/2 and friends are documented as throwing an error on Z_NEED_DICT
+%% rather than simply returning something to that effect, and deflateParams/3
+%% may flush behind the scenes. This requires us to stow away our current
+%% progress in the handle and resume from that point on our next call.
+%%
+%% Generally speaking this is either a refc binary or nothing at all, so it's
+%% pretty cheap.
+
+-spec save_progress(Z, Kind, Output) -> ok when
+ Z :: zstream(),
+ Kind :: inflate | deflate,
+ Output :: iolist().
+save_progress(Z, Kind, Output) ->
+ ok = setStash_nif(Z, {Kind, Output}).
+
+-spec restore_progress(Z, Kind) -> iolist() when
+ Z :: zstream(),
+ Kind :: inflate | deflate.
+restore_progress(Z, Kind) ->
+ case getStash_nif(Z) of
+ {ok, {Kind, Output}} ->
+ ok = clearStash_nif(Z),
+ Output;
+ empty ->
+ []
end.
-
-arg_flush(none) -> ?Z_NO_FLUSH;
+
+-spec clearStash_nif(Z) -> ok when
+ Z :: zstream().
+clearStash_nif(_Z) ->
+ erlang:nif_error(undef).
+
+-spec setStash_nif(Z, Term) -> ok when
+ Z :: zstream(),
+ Term :: term().
+setStash_nif(_Z, _Term) ->
+ erlang:nif_error(undef).
+
+-spec getStash_nif(Z) -> {ok, term()} | empty when
+ Z :: zstream().
+getStash_nif(_Z) ->
+ erlang:nif_error(undef).
+
+%% The 'proplists' module isn't preloaded so we can't rely on its existence.
+proplist_get_value([], _Name, DefVal) -> DefVal;
+proplist_get_value([{Name, Value} | _Opts], Name, _DefVal) -> Value;
+proplist_get_value([_Head | Opts], Name, DefVal) ->
+ proplist_get_value(Opts, Name, DefVal).
+
+arg_flush(none) -> ?Z_NO_FLUSH;
%% ?Z_PARTIAL_FLUSH is deprecated in zlib -- deliberately not included.
-arg_flush(sync) -> ?Z_SYNC_FLUSH;
-arg_flush(full) -> ?Z_FULL_FLUSH;
-arg_flush(finish) -> ?Z_FINISH;
-arg_flush(_) -> erlang:error(badarg).
+arg_flush(sync) -> ?Z_SYNC_FLUSH;
+arg_flush(full) -> ?Z_FULL_FLUSH;
+arg_flush(finish) -> ?Z_FINISH;
+arg_flush(_) -> erlang:error(bad_flush_mode).
arg_level(none) -> ?Z_NO_COMPRESSION;
arg_level(best_speed) -> ?Z_BEST_SPEED;
arg_level(best_compression) -> ?Z_BEST_COMPRESSION;
arg_level(default) -> ?Z_DEFAULT_COMPRESSION;
arg_level(Level) when is_integer(Level), Level >= 0, Level =< 9 -> Level;
-arg_level(_) -> erlang:error(badarg).
-
+arg_level(_) -> erlang:error(bad_compression_level).
+
arg_strategy(filtered) -> ?Z_FILTERED;
arg_strategy(huffman_only) -> ?Z_HUFFMAN_ONLY;
arg_strategy(rle) -> ?Z_RLE;
arg_strategy(default) -> ?Z_DEFAULT_STRATEGY;
-arg_strategy(_) -> erlang:error(badarg).
+arg_strategy(_) -> erlang:error(bad_compression_strategy).
arg_method(deflated) -> ?Z_DEFLATED;
-arg_method(_) -> erlang:error(badarg).
+arg_method(_) -> erlang:error(bad_compression_method).
-spec arg_bitsz(zwindowbits()) -> zwindowbits().
arg_bitsz(Bits) when is_integer(Bits) andalso
- ((8 =< Bits andalso Bits < 48) orelse
- (-15 =< Bits andalso Bits =< -8)) ->
+ ((8 =< Bits andalso Bits < 48) orelse
+ (-15 =< Bits andalso Bits =< -8)) ->
Bits;
-arg_bitsz(_) -> erlang:error(badarg).
+arg_bitsz(_) -> erlang:error(bad_windowbits).
-spec arg_mem(zmemlevel()) -> zmemlevel().
arg_mem(Level) when is_integer(Level), 1 =< Level, Level =< 9 -> Level;
-arg_mem(_) -> erlang:error(badarg).
-
-call(Z, Cmd, Arg) ->
- try port_control(Z, Cmd, Arg) of
- [0|Res] -> list_to_atom(Res);
- [1|Res] ->
- flush(Z),
- erlang:error(list_to_atom(Res));
- [2,A,B,C,D] ->
- (A bsl 24)+(B bsl 16)+(C bsl 8)+D;
- [3,A,B,C,D] ->
- erlang:error({need_dictionary,(A bsl 24)+(B bsl 16)+(C bsl 8)+D});
- [4, _, _, _, _] ->
- inflate_has_more
- catch
- error:badarg -> %% Rethrow loses port_control from stacktrace.
- erlang:error(badarg)
- end.
+arg_mem(_) -> erlang:error(bad_memlevel).
-reverse(X) ->
- reverse(X, []).
+-spec enqueue_input(Z, IOData) -> ok when
+ Z :: zstream(),
+ IOData :: iodata().
+enqueue_input(Z, IOData) ->
+ enqueue_input_1(Z, erlang:iolist_to_iovec(IOData)).
+
+enqueue_input_1(_Z, []) ->
+ ok;
+enqueue_input_1(Z, IOVec) ->
+ case enqueue_nif(Z, IOVec) of
+ {continue, Remainder} -> enqueue_input_1(Z, Remainder);
+ ok -> ok
+ end.
-reverse([H|T], Y) ->
- reverse(T, [H|Y]);
-reverse([], X) ->
- X.
+enqueue_nif(_Z, _IOVec) ->
+ erlang:nif_error(undef). \ No newline at end of file