1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef RASTERMILL_STREAM_H 18 #define RASTERMILL_STREAM_H 19 20 #include <jni.h> 21 #include <stdio.h> 22 #include <sys/types.h> 23 24 class Stream { 25 public: 26 Stream(); 27 virtual ~Stream(); 28 29 size_t peek(void* buffer, size_t size); 30 size_t read(void* buffer, size_t size); 31 32 protected: 33 virtual size_t doRead(void* buffer, size_t size) = 0; 34 35 private: 36 char* mPeekBuffer; 37 size_t mPeekSize; 38 size_t mPeekOffset; 39 }; 40 41 class MemoryStream : public Stream { 42 public: 43 MemoryStream(void* buffer, size_t size) : 44 mBuffer((char*)buffer), 45 mRemaining(size) {} 46 47 protected: 48 virtual size_t doRead(void* buffer, size_t size); 49 50 private: 51 char* mBuffer; 52 size_t mRemaining; 53 }; 54 55 class FileStream : public Stream { 56 public: 57 FileStream(FILE* fd) : mFd(fd) {} 58 59 protected: 60 virtual size_t doRead(void* buffer, size_t size); 61 62 private: 63 FILE* mFd; 64 }; 65 66 class JavaInputStream : public Stream { 67 public: 68 JavaInputStream(JNIEnv* env, jobject inputStream, jbyteArray byteArray) : 69 mEnv(env), 70 mInputStream(inputStream), 71 mByteArray(byteArray), 72 mByteArrayLength(env->GetArrayLength(byteArray)) {} 73 74 protected: 75 virtual size_t doRead(void* buffer, size_t size); 76 77 private: 78 JNIEnv* mEnv; 79 const jobject mInputStream; 80 const jbyteArray mByteArray; 81 const size_t mByteArrayLength; 82 }; 83 84 jint JavaStream_OnLoad(JNIEnv* env); 85 86 #endif //RASTERMILL_STREAM_H 87
