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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
2.1 KiB
C++
75 lines
2.1 KiB
C++
//===- StringTableBuilder.h - String table building utility -----*- 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_MC_STRINGTABLEBUILDER_H
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#define LLVM_MC_STRINGTABLEBUILDER_H
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#include "llvm/ADT/CachedHashString.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringRef.h"
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#include <cstddef>
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#include <cstdint>
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namespace llvm {
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class raw_ostream;
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/// Utility for building string tables with deduplicated suffixes.
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class StringTableBuilder {
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public:
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enum Kind { ELF, WinCOFF, MachO, RAW, DWARF };
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private:
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DenseMap<CachedHashStringRef, size_t> StringIndexMap;
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size_t Size = 0;
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Kind K;
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unsigned Alignment;
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bool Finalized = false;
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void finalizeStringTable(bool Optimize);
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void initSize();
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public:
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StringTableBuilder(Kind K, unsigned Alignment = 1);
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~StringTableBuilder();
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/// Add a string to the builder. Returns the position of S in the
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/// table. The position will be changed if finalize is used.
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/// Can only be used before the table is finalized.
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size_t add(CachedHashStringRef S);
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size_t add(StringRef S) { return add(CachedHashStringRef(S)); }
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/// Analyze the strings and build the final table. No more strings can
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/// be added after this point.
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void finalize();
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/// Finalize the string table without reording it. In this mode, offsets
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/// returned by add will still be valid.
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void finalizeInOrder();
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/// Get the offest of a string in the string table. Can only be used
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/// after the table is finalized.
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size_t getOffset(CachedHashStringRef S) const;
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size_t getOffset(StringRef S) const {
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return getOffset(CachedHashStringRef(S));
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}
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size_t getSize() const { return Size; }
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void clear();
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void write(raw_ostream &OS) const;
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void write(uint8_t *Buf) const;
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private:
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bool isFinalized() const { return Finalized; }
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};
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} // end namespace llvm
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#endif // LLVM_MC_STRINGTABLEBUILDER_H
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