Implement QLZ4

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "zlib"]
 	path = zlib
 	url = https://github.com/madler/zlib.git
-[submodule "lz4"]
-	path = lz4
-	url = https://github.com/lz4/lz4

Deling.pro

@@ -21,6 +21,7 @@ lessThan(QT_MAJOR_VERSION, 5) {
 # Input
 HEADERS += MainWindow.h \
     PreviewWidget.h \
+    QLZ4.h \
     parameters.h \
     Data.h \
     Config.h \
@@ -109,6 +110,7 @@ HEADERS += MainWindow.h \
 
 SOURCES += MainWindow.cpp \
     PreviewWidget.cpp \
+    QLZ4.cpp \
     main.cpp \
     Data.cpp \
     Config.cpp \
@@ -222,7 +224,8 @@ RESOURCES += Deling.qrc
 !win32 {
     LIBS += -llz4
 } else {
-    INCLUDEPATH += lz4/lib
+    INCLUDEPATH += lz4
+    LIBS += $$_PRO_FILE_PWD_/lz4/liblz4.lib
 }
 
 win32 {

QLZ4.cpp

@@ -0,0 +1,88 @@
+#include "QLZ4.h"
+#include <lz4.h>
+
+QByteArray QLZ4::result;
+
+const QByteArray &QLZ4::decompressAll(const char *data, int size, bool *ok)
+{
+	if (ok != nullptr) {
+		*ok = false;
+	}
+
+	if (size <= 8) {
+		return result;
+	}
+
+	int dstCapacity;
+
+	memcpy(&dstCapacity, data + 4, 4);
+
+	// Impossible ratio
+	if (dstCapacity > size * 2000) {
+		return result;
+	}
+
+	result.resize(dstCapacity * 1000);
+
+	int decSize = LZ4_decompress_safe(data + 8, result.data(), size - 8, result.size());
+
+	if (decSize < 0) {
+		return result;
+	}
+
+	if (ok != nullptr) {
+		*ok = true;
+	}
+
+	result.resize(decSize);
+
+	return result;
+}
+
+const QByteArray &QLZ4::decompress(const char *data, int size, int max, bool *ok)
+{
+	if (ok != nullptr) {
+		*ok = false;
+	}
+
+	if (size <= 8) {
+		return result;
+	}
+
+	result.resize(max + 10);
+
+	int decSize = LZ4_decompress_safe_partial(data + 8, result.data(), size - 8, max, result.size());
+
+	if (decSize < 0) {
+		return result;
+	}
+
+	if (ok != nullptr) {
+		*ok = true;
+	}
+
+	result.resize(decSize);
+
+	return result;
+}
+
+const QByteArray &QLZ4::compress(const char *data, int size)
+{
+	if (size <= 0) {
+		result.resize(0);
+
+		return result;
+	}
+
+	result.resize(size * 2);
+
+	int compSize = LZ4_compress_default(data, result.data() + 8, size, result.size() - 8);
+
+	if (compSize > 0) {
+		result.resize(8 + compSize);
+		memcpy(result.data(), "4ZL_", 4);
+		memcpy(result.data() + 4, &size, 4);
+	}
+
+	return result;
+}

QLZ4.h

@@ -0,0 +1,25 @@
+#ifndef QLZ4_H
+#define QLZ4_H
+
+#include <QByteArray>
+
+class QLZ4
+{
+public:
+	static const QByteArray &decompressAll(const QByteArray &data, bool *ok = nullptr) {
+		return decompressAll(data.constData(), data.size(), ok);
+	}
+	static const QByteArray &decompressAll(const char *data, int size, bool *ok = nullptr);
+	static const QByteArray &decompress(const QByteArray &data, int max, bool *ok = nullptr) {
+		return decompress(data.constData(), data.size(), max, ok);
+	}
+	static const QByteArray &decompress(const char *data, int size, int max, bool *ok = nullptr);
+	static const QByteArray &compress(const QByteArray &data) {
+		return compress(data.constData(), data.size());
+	}
+	static const QByteArray &compress(const char *data, int size);
+private:
+	static QByteArray result;
+};
+
+#endif // QLZ4_H

README.md

@@ -17,6 +17,7 @@ Final Fantasy VIII field archive editor.
  - lz4
 
 On Windows, you can either use mingw32 (g++) or msvc to compile.
+You need liblz4.dll to run Deling on Windows.
 
 ### With Qt Creator
 

deploy.bat

@@ -21,6 +21,8 @@ for %%l in (%LANGUAGES%) do (
     echo "Create %QT_TR_DIR%\qtbase_%%l.qm"
 )
 
+xcopy /y %LIB_DIR%\liblz4.dll %OUTPUT_DIR%
+
 rem Deploy Exe
 xcopy /y %EXE_PATH% %OUTPUT_DIR%