17cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines/* 27cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Copyright 2012, The Android Open Source Project 37cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 47cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Licensed under the Apache License, Version 2.0 (the "License"); 57cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * you may not use this file except in compliance with the License. 67cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * You may obtain a copy of the License at 77cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 87cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * http://www.apache.org/licenses/LICENSE-2.0 97cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * 107cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * Unless required by applicable law or agreed to in writing, software 117cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * distributed under the License is distributed on an "AS IS" BASIS, 127cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 137cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * See the License for the specific language governing permissions and 147cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines * limitations under the License. 157cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines */ 167cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 177cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines// Define a generic interface to a file/memory region that contains 187cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines// a bitcode file, a wrapped bitcode file, or a data file to wrap. 197cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 207cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#ifndef LLVM_WRAP_WRAPPER_INPUT_H__ 217cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#define LLVM_WRAP_WRAPPER_INPUT_H__ 227cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 237cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include <stdint.h> 247cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include <sys/types.h> 257cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 267cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#include "support_macros.h" 277cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 287cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines// The following is a generic interface to a file/memory region that contains 297cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines// a bitcode file, a wrapped bitcode file, or data file to wrap. 307cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hinesclass WrapperInput { 317cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines public: 327cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines WrapperInput() {} 337cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines virtual ~WrapperInput() {} 347cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // Tries to read the requested number of bytes into the buffer. Returns the 357cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // actual number of bytes read. 367cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines virtual size_t Read(uint8_t* buffer, size_t wanted) = 0; 377cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // Returns true if at end of input. Note: May return false until 387cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // Read is called, and returns 0. 397cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines virtual bool AtEof() = 0; 407cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // Returns the size of the input (in bytes). 417cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines virtual off_t Size() = 0; 427cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // Moves to the given offset within the input region. Returns false 437cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines // if unable to move to that position. 447cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines virtual bool Seek(uint32_t pos) = 0; 457cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines private: 467cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines DISALLOW_CLASS_COPY_AND_ASSIGN(WrapperInput); 477cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines}; 487cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines 497cd4c49d575478b2380f129dcd376a4e5e37939cStephen Hines#endif // LLVM_WRAP_WRAPPER_INPUT_H__ 50