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