Basic compression on Windows, Unix placeholder

parsec-cloud · Dec 19, 2023 · 57a6baf · 57a6baf
1 parent 61436ed
commit 57a6baf
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diff --git a/Android.mk b/Android.mk
@@ -63,6 +63,7 @@ LOCAL_SRC_FILES := \
 	src/gfx/vk/vk-ctx.c \
 	src/gfx/vk/vk-ui.c \
 	src/hid/utils.c \
+	src/unix/compress.c \
 	src/unix/file.c \
 	src/unix/memory.c \
 	src/unix/system.c \

diff --git a/GNUmakefile b/GNUmakefile
@@ -39,6 +39,7 @@ OBJS = \
 	src/tlocal.o \
 	src/version.o \
 	src/hid/utils.o \
+	src/unix/compress.o \
 	src/unix/file.o \
 	src/unix/memory.o \
 	src/unix/thread.o \

diff --git a/makefile b/makefile
@@ -49,6 +49,7 @@ OBJS = \
 	src\windows\aes-gcm.obj \
 	src\windows\appw.obj \
 	src\windows\audio.obj \
+	src\windows\compress.obj \
 	src\windows\cryptow.obj \
 	src\windows\dialog.obj \
 	src\windows\dtlsw.obj \

diff --git a/src/matoya.h b/src/matoya.h
@@ -1496,6 +1496,32 @@ MTY_EXPORT void
 MTY_ResamplerReset(MTY_Resampler *ctx);
 
 
+//- #module Compression
+//- #mbrief Basic compression.
+//- #mdetails These functions are platform specific and any data compressed with
+//-   these functions should only be decompressed on the same platform.
+
+/// @brief Compress data with a balanced algorithm.
+/// @param input Uncompressed input buffer.
+/// @param inputSize Size in bytes of `input`.
+/// @param outputSize Set to the size in bytes of the returned compressed buffer.
+/// @returns On failure, NULL is returned. Call MTY_GetLog for details.\n\n
+///   The returned buffer must be destroyed with MTY_Free.
+MTY_EXPORT void *
+MTY_Compress(const void *input, size_t inputSize, size_t *outputSize);
+
+/// @brief Decompress data compressed with MTY_Compress.
+/// @details This function should only be called on the same platform that originally
+///   called MTY_Compress.
+/// @param input Compressed input buffer.
+/// @param inputSize Size in bytes of `input`.
+/// @param outputSize Set to the size in bytes of the returned decompressed buffer.
+/// @returns On failure, NULL is returned. Call MTY_GetLog for details.\n\n
+///   The returned buffer must be destroyed with MTY_Free.
+MTY_EXPORT void *
+MTY_Decompress(const void *input, size_t inputSize, size_t *outputSize);
+
+
 //- #module Crypto
 //- #mbrief Common cryptography tasks.
 

diff --git a/src/unix/compress.c b/src/unix/compress.c
@@ -0,0 +1,19 @@
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT License was not distributed with this file,
+// You can obtain one at https://spdx.org/licenses/MIT.html.
+
+#include "matoya.h"
+
+void *MTY_Compress(const void *input, size_t inputSize, size_t *outputSize)
+{
+	*outputSize = inputSize;
+
+	return MTY_Dup(input, inputSize);
+}
+
+void *MTY_Decompress(const void *input, size_t inputSize, size_t *outputSize)
+{
+	*outputSize = inputSize;
+
+	return MTY_Dup(input, inputSize);
+}
diff --git a/src/windows/compress.c b/src/windows/compress.c
@@ -0,0 +1,54 @@
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT License was not distributed with this file,
+// You can obtain one at https://spdx.org/licenses/MIT.html.
+
+#include "matoya.h"
+
+#include <windows.h>
+#include <compressapi.h>
+
+void *MTY_Compress(const void *input, size_t inputSize, size_t *outputSize)
+{
+	COMPRESSOR_HANDLE h = NULL;
+
+	if (!CreateCompressor(COMPRESS_ALGORITHM_MSZIP, NULL, &h))
+		return NULL;
+
+	BOOL success = Compress(h, input, inputSize, NULL, 0, outputSize);
+	if (!success && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+		return NULL;
+
+	void *output = MTY_Alloc(*outputSize, 1);
+
+	if (!Compress(h, input, inputSize, output, *outputSize, outputSize)) {
+		MTY_Free(output);
+		output = NULL;
+	}
+
+	CloseCompressor(h);
+
+	return output;
+}
+
+void *MTY_Decompress(const void *input, size_t inputSize, size_t *outputSize)
+{
+	DECOMPRESSOR_HANDLE h = NULL;
+
+	if (!CreateDecompressor(COMPRESS_ALGORITHM_MSZIP, NULL, &h))
+		return NULL;
+
+	BOOL success = Decompress(h, input, inputSize, NULL, 0, outputSize);
+	if (!success && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+		return NULL;
+
+	void *output = MTY_Alloc(*outputSize, 1);
+
+	if (!Decompress(h, input, inputSize, output, *outputSize, outputSize)) {
+		MTY_Free(output);
+		output = NULL;
+	}
+
+	CloseDecompressor(h);
+
+	return output;
+}