| //===- WasmWriter.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_LIB_OBJCOPY_WASM_WASMWRITER_H |
| #define LLVM_LIB_OBJCOPY_WASM_WASMWRITER_H |
| |
| #include "WasmObject.h" |
| #include <cstdint> |
| #include <vector> |
| |
| namespace llvm { |
| namespace objcopy { |
| namespace wasm { |
| |
| class Writer { |
| public: |
| Writer(Object &Obj, raw_ostream &Out) : Obj(Obj), Out(Out) {} |
| Error write(); |
| |
| private: |
| using SectionHeader = SmallVector<char, 8>; |
| Object &Obj; |
| raw_ostream &Out; |
| 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_LIB_OBJCOPY_WASM_WASMWRITER_H |