1 /* 2 * Copyright 2011, 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 __ANDROID_BCINFO_BITCODEWRAPPER_H__ 18 #define __ANDROID_BCINFO_BITCODEWRAPPER_H__ 19 20 #include <cstddef> 21 #include <stdint.h> 22 23 namespace bcinfo { 24 25 struct BCWrapperHeader { 26 uint32_t Magic; 27 uint32_t Version; 28 uint32_t BitcodeOffset; 29 uint32_t BitcodeSize; 30 uint32_t HeaderVersion; 31 uint32_t TargetAPI; 32 }; 33 34 enum BCFileType { 35 BC_NOT_BC = 0, 36 BC_WRAPPER = 1, 37 BC_RAW = 2 38 }; 39 40 class BitcodeWrapper { 41 private: 42 enum BCFileType mFileType; 43 const char *mBitcode; 44 const char *mBitcodeEnd; 45 size_t mBitcodeSize; 46 47 struct BCWrapperHeader mBCHeader; 48 49 public: 50 /** 51 * Reads wrapper information from \p bitcode. 52 * 53 * \param bitcode - input bitcode string. 54 * \param bitcodeSize - length of \p bitcode string (in bytes). 55 */ 56 BitcodeWrapper(const char *bitcode, size_t bitcodeSize); 57 58 ~BitcodeWrapper(); 59 60 /** 61 * Attempt to unwrap the target bitcode. 62 * 63 * \return true on success and false if an error occurred. 64 */ 65 bool unwrap(); 66 67 /** 68 * \return type of bitcode file. 69 */ 70 enum BCFileType getBCFileType() const { 71 return mFileType; 72 } 73 74 /** 75 * \return header version of bitcode wrapper. This can only be 0 currently. 76 */ 77 uint32_t getHeaderVersion() const { 78 return mBCHeader.HeaderVersion; 79 } 80 81 /** 82 * \return target API version of this script. 83 */ 84 uint32_t getTargetAPI() const { 85 return mBCHeader.TargetAPI; 86 } 87 }; 88 89 } // namespace bcinfo 90 91 #endif // __ANDROID_BCINFO_BITCODEWRAPPER_H__ 92
