diff options
| -rw-r--r-- | core/io/stream_peer_gzip.cpp | 209 | ||||
| -rw-r--r-- | core/io/stream_peer_gzip.h | 76 | ||||
| -rw-r--r-- | core/register_core_types.cpp | 2 | ||||
| -rw-r--r-- | doc/classes/StreamPeerGZIP.xml | 42 |
4 files changed, 329 insertions, 0 deletions
diff --git a/core/io/stream_peer_gzip.cpp b/core/io/stream_peer_gzip.cpp new file mode 100644 index 0000000000..ca8be2d62e --- /dev/null +++ b/core/io/stream_peer_gzip.cpp @@ -0,0 +1,209 @@ +/*************************************************************************/ +/* stream_peer_gzip.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#include "core/io/stream_peer_gzip.h" + +#include "core/io/zip_io.h" +#include <zlib.h> + +void StreamPeerGZIP::_bind_methods() { + ClassDB::bind_method(D_METHOD("start_compression", "use_deflate", "buffer_size"), &StreamPeerGZIP::start_compression, DEFVAL(false), DEFVAL(65535)); + ClassDB::bind_method(D_METHOD("start_decompression", "use_deflate", "buffer_size"), &StreamPeerGZIP::start_decompression, DEFVAL(false), DEFVAL(65535)); + ClassDB::bind_method(D_METHOD("finish"), &StreamPeerGZIP::finish); + ClassDB::bind_method(D_METHOD("clear"), &StreamPeerGZIP::clear); +} + +StreamPeerGZIP::StreamPeerGZIP() { +} + +StreamPeerGZIP::~StreamPeerGZIP() { + _close(); +} + +void StreamPeerGZIP::_close() { + if (ctx) { + z_stream *strm = (z_stream *)ctx; + if (compressing) { + deflateEnd(strm); + } else { + inflateEnd(strm); + } + memfree(strm); + ctx = nullptr; + } +} + +void StreamPeerGZIP::clear() { + _close(); + rb.clear(); + buffer.clear(); +} + +Error StreamPeerGZIP::start_compression(bool p_is_deflate, int buffer_size) { + return _start(true, p_is_deflate, buffer_size); +} + +Error StreamPeerGZIP::start_decompression(bool p_is_deflate, int buffer_size) { + return _start(false, p_is_deflate, buffer_size); +} + +Error StreamPeerGZIP::_start(bool p_compress, bool p_is_deflate, int buffer_size) { + ERR_FAIL_COND_V(ctx != nullptr, ERR_ALREADY_IN_USE); + clear(); + compressing = p_compress; + rb.resize(nearest_shift(buffer_size - 1)); + buffer.resize(1024); + + // Create ctx. + ctx = memalloc(sizeof(z_stream)); + z_stream &strm = *(z_stream *)ctx; + strm.next_in = Z_NULL; + strm.avail_in = 0; + strm.zalloc = zipio_alloc; + strm.zfree = zipio_free; + strm.opaque = Z_NULL; + int window_bits = p_is_deflate ? 15 : (15 + 16); + int err = Z_OK; + int level = Z_DEFAULT_COMPRESSION; + if (compressing) { + err = deflateInit2(&strm, level, Z_DEFLATED, window_bits, 8, Z_DEFAULT_STRATEGY); + } else { + err = inflateInit2(&strm, window_bits); + } + ERR_FAIL_COND_V(err != Z_OK, FAILED); + return OK; +} + +Error StreamPeerGZIP::_process(uint8_t *p_dst, int p_dst_size, const uint8_t *p_src, int p_src_size, int &r_consumed, int &r_out, bool p_close) { + ERR_FAIL_COND_V(!ctx, ERR_UNCONFIGURED); + z_stream &strm = *(z_stream *)ctx; + strm.avail_in = p_src_size; + strm.avail_out = p_dst_size; + strm.next_in = (Bytef *)p_src; + strm.next_out = (Bytef *)p_dst; + int flush = p_close ? Z_FINISH : Z_NO_FLUSH; + if (compressing) { + int err = deflate(&strm, flush); + ERR_FAIL_COND_V(err != (p_close ? Z_STREAM_END : Z_OK), FAILED); + } else { + int err = inflate(&strm, flush); + ERR_FAIL_COND_V(err != Z_OK && err != Z_STREAM_END, FAILED); + } + r_out = p_dst_size - strm.avail_out; + r_consumed = p_src_size - strm.avail_in; + return OK; +} + +Error StreamPeerGZIP::put_data(const uint8_t *p_data, int p_bytes) { + int wrote = 0; + Error err = put_partial_data(p_data, p_bytes, wrote); + if (err != OK) { + return err; + } + ERR_FAIL_COND_V(p_bytes != wrote, ERR_OUT_OF_MEMORY); + return OK; +} + +Error StreamPeerGZIP::put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) { + ERR_FAIL_COND_V(!ctx, ERR_UNCONFIGURED); + ERR_FAIL_COND_V(p_bytes < 0, ERR_INVALID_PARAMETER); + + // Ensure we have enough space in temporary buffer. + if (buffer.size() < p_bytes) { + buffer.resize(p_bytes); + } + + r_sent = 0; + while (r_sent < p_bytes && rb.space_left() > 1024) { // Keep the ring buffer size meaningful. + int sent = 0; + int to_write = 0; + // Compress or decompress + Error err = _process(buffer.ptrw(), MIN(buffer.size(), rb.space_left()), p_data + r_sent, p_bytes - r_sent, sent, to_write); + if (err != OK) { + return err; + } + // When decompressing, we might need to do another round. + r_sent += sent; + + // We can't write more than this buffer is full. + if (sent == 0 && to_write == 0) { + return OK; + } + if (to_write) { + // Copy to ring buffer. + int wrote = rb.write(buffer.ptr(), to_write); + ERR_FAIL_COND_V(wrote != to_write, ERR_BUG); + } + } + return OK; +} + +Error StreamPeerGZIP::get_data(uint8_t *p_buffer, int p_bytes) { + int received = 0; + Error err = get_partial_data(p_buffer, p_bytes, received); + if (err != OK) { + return err; + } + ERR_FAIL_COND_V(p_bytes != received, ERR_UNAVAILABLE); + return OK; +} + +Error StreamPeerGZIP::get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) { + ERR_FAIL_COND_V(p_bytes < 0, ERR_INVALID_PARAMETER); + + r_received = MIN(p_bytes, rb.data_left()); + if (r_received == 0) { + return OK; + } + int received = rb.read(p_buffer, r_received); + ERR_FAIL_COND_V(received != r_received, ERR_BUG); + return OK; +} + +int StreamPeerGZIP::get_available_bytes() const { + return rb.data_left(); +} + +Error StreamPeerGZIP::finish() { + ERR_FAIL_COND_V(!ctx || !compressing, ERR_UNAVAILABLE); + // Ensure we have enough space in temporary buffer. + if (buffer.size() < 1024) { + buffer.resize(1024); // 1024 should be more than enough. + } + int consumed = 0; + int to_write = 0; + Error err = _process(buffer.ptrw(), 1024, nullptr, 0, consumed, to_write, true); // compress + if (err != OK) { + return err; + } + int wrote = rb.write(buffer.ptr(), to_write); + ERR_FAIL_COND_V(wrote != to_write, ERR_OUT_OF_MEMORY); + return OK; +} diff --git a/core/io/stream_peer_gzip.h b/core/io/stream_peer_gzip.h new file mode 100644 index 0000000000..5bafdbca9b --- /dev/null +++ b/core/io/stream_peer_gzip.h @@ -0,0 +1,76 @@ +/*************************************************************************/ +/* stream_peer_gzip.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ + +#ifndef STREAM_PEER_GZIP_H +#define STREAM_PEER_GZIP_H + +#include "core/io/stream_peer.h" + +#include "core/core_bind.h" +#include "core/io/compression.h" +#include "core/templates/ring_buffer.h" + +class StreamPeerGZIP : public StreamPeer { + GDCLASS(StreamPeerGZIP, StreamPeer); + +private: + void *ctx = nullptr; // Will hold our z_stream instance. + bool compressing = true; + + RingBuffer<uint8_t> rb; + Vector<uint8_t> buffer; + + Error _process(uint8_t *p_dst, int p_dst_size, const uint8_t *p_src, int p_src_size, int &r_consumed, int &r_out, bool p_close = false); + void _close(); + Error _start(bool p_compress, bool p_is_deflate, int buffer_size = 65535); + +protected: + static void _bind_methods(); + +public: + Error start_compression(bool p_is_deflate, int buffer_size = 65535); + Error start_decompression(bool p_is_deflate, int buffer_size = 65535); + + Error finish(); + void clear(); + + virtual Error put_data(const uint8_t *p_data, int p_bytes) override; + virtual Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) override; + + virtual Error get_data(uint8_t *p_buffer, int p_bytes) override; + virtual Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) override; + + virtual int get_available_bytes() const override; + + StreamPeerGZIP(); + ~StreamPeerGZIP(); +}; + +#endif // STREAM_PEER_GZIP_H diff --git a/core/register_core_types.cpp b/core/register_core_types.cpp index 0233afe199..64cc6f2aab 100644 --- a/core/register_core_types.cpp +++ b/core/register_core_types.cpp @@ -58,6 +58,7 @@ #include "core/io/resource_format_binary.h" #include "core/io/resource_importer.h" #include "core/io/resource_uid.h" +#include "core/io/stream_peer_gzip.h" #include "core/io/stream_peer_tls.h" #include "core/io/tcp_server.h" #include "core/io/translation_loader_po.h" @@ -184,6 +185,7 @@ void register_core_types() { GDREGISTER_ABSTRACT_CLASS(StreamPeer); GDREGISTER_CLASS(StreamPeerExtension); GDREGISTER_CLASS(StreamPeerBuffer); + GDREGISTER_CLASS(StreamPeerGZIP); GDREGISTER_CLASS(StreamPeerTCP); GDREGISTER_CLASS(TCPServer); diff --git a/doc/classes/StreamPeerGZIP.xml b/doc/classes/StreamPeerGZIP.xml new file mode 100644 index 0000000000..71dd36160d --- /dev/null +++ b/doc/classes/StreamPeerGZIP.xml @@ -0,0 +1,42 @@ +<?xml version="1.0" encoding="UTF-8" ?> +<class name="StreamPeerGZIP" inherits="StreamPeer" is_experimental="true" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd"> + <brief_description> + Stream peer handling GZIP and deflate compression/decompresison. + </brief_description> + <description> + This class allows to compress or decompress data using GZIP/deflate in a streaming fashion. This is particularly useful when compressing or decompressing files that has to be sent through the network without having to allocate them all in memory. + After starting the stream via [method start_compression] (or [method start_decompression]), calling [method StreamPeer.put_partial_data] on this stream will compress (or decompress) the data, writing it to the internal buffer. Calling [method StreamPeer.get_available_bytes] will return the pending bytes in the internal buffer, and [method StreamPeer.get_partial_data] will retrieve the compressed (or decompressed) bytes from it. When the stream is over, you must call [method finish] to ensure the internal buffer is properly flushed (make sure to call [method StreamPeer.get_available_bytes] on last time to check if more data needs to be read after that). + </description> + <tutorials> + </tutorials> + <methods> + <method name="clear"> + <return type="void" /> + <description> + Clears this stream, resetting the internal state. + </description> + </method> + <method name="finish"> + <return type="int" enum="Error" /> + <description> + Finalizes the stream, compressing or decompressing any buffered chunk left. + </description> + </method> + <method name="start_compression"> + <return type="int" enum="Error" /> + <param index="0" name="use_deflate" type="bool" default="false" /> + <param index="1" name="buffer_size" type="int" default="65535" /> + <description> + Start the stream in compression mode with the given [param buffer_size], if [param use_deflate] is [code]true[/code] uses deflate instead of GZIP. + </description> + </method> + <method name="start_decompression"> + <return type="int" enum="Error" /> + <param index="0" name="use_deflate" type="bool" default="false" /> + <param index="1" name="buffer_size" type="int" default="65535" /> + <description> + Start the stream in decompression mode with the given [param buffer_size], if [param use_deflate] is [code]true[/code] uses deflate instead of GZIP. + </description> + </method> + </methods> +</class> |