//===- Writer.h -------------------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef LLVM_TOOLS_LLVM_OBJCOPY_WASM_WRITER_H #define LLVM_TOOLS_LLVM_OBJCOPY_WASM_WRITER_H #include "Buffer.h" #include "Object.h" #include <cstdint> #include <vector> namespace llvm { namespace objcopy { namespace wasm { class Writer { public: Writer(Object &Obj, Buffer &Buf) : Obj(Obj), Buf(Buf) {} Error write(); private: using SectionHeader = SmallVector<char, 8>; Object &Obj; Buffer &Buf; std::vector<SectionHeader> SectionHeaders; /// Generate a wasm section section header for S. /// The header consists of /// * A one-byte section ID (aka the section type). /// * The size of the section contents, encoded as ULEB128. /// * If the section is a custom section (type 0) it also has a name, which is /// encoded as a length-prefixed string. The encoded section size *includes* /// this string. /// See https://webassembly.github.io/spec/core/binary/modules.html#sections /// Return the header and store the total size in SectionSize. static SectionHeader createSectionHeader(const Section &S, size_t &SectionSize); size_t finalize(); }; } // end namespace wasm } // end namespace objcopy } // end namespace llvm #endif // LLVM_TOOLS_LLVM_OBJCOPY_WASM_WRITER_H |