Add Android project

src/openrct2/core/ZipAndroid.cpp

@@ -0,0 +1,179 @@
+#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
+/*****************************************************************************
+ * OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
+ *
+ * OpenRCT2 is the work of many authors, a full list can be found in contributors.md
+ * For more information, visit https://github.com/OpenRCT2/OpenRCT2
+ *
+ * OpenRCT2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * A full copy of the GNU General Public License can be found in licence.txt
+ *****************************************************************************/
+#pragma endregion
+
+#ifdef __ANDROID__
+
+#include <SDL.h>
+#include <jni.h>
+#include "IStream.hpp"
+#include "Zip.h"
+#include "MemoryStream.h"
+
+class ZipArchive final : public IZipArchive {
+private:
+    jobject _zip;
+
+public:
+    ZipArchive(const utf8 *path, ZIP_ACCESS access) {
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass jniClass = env->FindClass("website/openrct2/ZipArchive");
+        jmethodID constructor = env->GetMethodID(jniClass, "<init>", "(Ljava/lang/String;)V");
+
+        jstring jniPath = env->NewStringUTF(path);
+
+        // TODO: Catch exceptions. Should probably be done on Java side, and just return null from a static method
+        jobject zip = env->NewObject(jniClass, constructor, jniPath);
+
+        _zip = env->NewGlobalRef(zip);
+
+    }
+
+    ~ZipArchive() override {
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass zipClass = env->GetObjectClass(_zip);
+        jmethodID closeMethod = env->GetMethodID(zipClass, "close", "()V");
+
+        env->CallVoidMethod(_zip, closeMethod);
+
+        env->DeleteGlobalRef(_zip);
+    }
+
+    size_t GetNumFiles() const override {
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass zipClass = env->GetObjectClass(_zip);
+        jmethodID fileCountMethod = env->GetMethodID(zipClass, "getNumFiles", "()I");
+
+        return (size_t) env->CallIntMethod(_zip, fileCountMethod);
+    }
+
+    const utf8 *GetFileName(size_t index) const override {
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass zipClass = env->GetObjectClass(_zip);
+        jmethodID fileNameMethod = env->GetMethodID(zipClass, "getFileName",
+                                                    "(I)Ljava/lang/String;");
+
+        jstring jniString = (jstring) env->CallObjectMethod(_zip, fileNameMethod, (jint) index);
+
+        const char *jniChars = env->GetStringUTFChars(jniString, nullptr);
+
+        utf8 *string = (char *) malloc(strlen(jniChars) + 1);
+        memcpy((void *) string, jniChars, strlen(jniChars));
+        string[strlen(jniChars)] = 0x00;
+
+        env->ReleaseStringUTFChars(jniString, jniChars);
+
+        return string;
+    }
+
+    uint64 GetFileSize(size_t index) const override {
+
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass zipClass = env->GetObjectClass(_zip);
+        jmethodID fileSizeMethod = env->GetMethodID(zipClass, "getFileSize", "(I)J");
+
+        return (size_t) env->CallLongMethod(_zip, fileSizeMethod, (jint) index);
+    }
+
+    void *GetFileData(const utf8 *path, size_t *outSize) const override {
+
+        // retrieve the JNI environment.
+        JNIEnv *env = (JNIEnv *) SDL_AndroidGetJNIEnv();
+
+        jclass zipClass = env->GetObjectClass(_zip);
+        jstring javaPath = env->NewStringUTF(path);
+        jmethodID indexMethod = env->GetMethodID(zipClass, "getFileIndex", "(Ljava/lang/String;)I");
+        jint index = env->CallIntMethod(_zip, indexMethod, javaPath);
+
+        jmethodID fileMethod = env->GetMethodID(zipClass, "getFile", "(I)J");
+        jlong ptr = env->CallLongMethod(_zip, fileMethod, index);
+
+        *outSize = this->GetFileSize(index);
+        return reinterpret_cast<void *>(ptr);
+    }
+
+    IStream *GetFileStream(const utf8 *path) const override {
+        IStream * stream = nullptr;
+        size_t dataSize;
+        void * data = GetFileData(path, &dataSize);
+        if (data != nullptr)
+        {
+            stream = new MemoryStream(data, dataSize, MEMORY_ACCESS::READ | MEMORY_ACCESS::OWNER);
+        }
+        return stream;
+    }
+
+    void SetFileData(const utf8 *path, void *data, size_t dataSize) override {
+        STUB();
+    }
+
+    void DeleteFile(const utf8 *path) override {
+        STUB();
+    }
+
+    void RenameFile(const utf8 *path, const utf8 *newPath) override {
+        STUB();
+    }
+};
+
+namespace Zip {
+    IZipArchive *Open(const utf8 *path, ZIP_ACCESS access) {
+        return new ZipArchive(path, access);
+    }
+
+    IZipArchive *TryOpen(const utf8 *path, ZIP_ACCESS access) {
+        IZipArchive *result = nullptr;
+        try {
+            result = new ZipArchive(path, access);
+        }
+        catch (Exception) {
+        }
+        return result;
+    }
+}
+
+extern "C" {
+
+JNIEXPORT jlong JNICALL
+Java_website_openrct2_ZipArchive_allocBytes(JNIEnv *env, jclass, jbyteArray input,
+                                                jint numBytes);
+}
+
+
+JNIEXPORT jlong JNICALL
+Java_website_openrct2_ZipArchive_allocBytes(JNIEnv *env, jclass, jbyteArray input,
+                                                jint numBytes) {
+
+    jbyte *bufferPtr = env->GetByteArrayElements(input, NULL);
+
+    void *data = Memory::Allocate<void>((size_t) numBytes);
+    memcpy(data, bufferPtr, numBytes);
+
+    env->ReleaseByteArrayElements(input, bufferPtr, 0);
+
+    return (uintptr_t) data;
+}
+
+#endif // __ANDROID__