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75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
//===-- RemarkStringTable.h - Serializing string table ----------*- 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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//
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// This class is used to deduplicate and serialize a string table used for
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// generating remarks.
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//
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// For parsing a string table, use ParsedStringTable in RemarkParser.h
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_REMARKS_REMARKSTRINGTABLE_H
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#define LLVM_REMARKS_REMARKSTRINGTABLE_H
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Support/Allocator.h"
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#include <vector>
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namespace llvm {
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class raw_ostream;
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class StringRef;
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namespace remarks {
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struct ParsedStringTable;
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struct Remark;
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/// The string table used for serializing remarks.
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/// This table can be for example serialized in a section to be consumed after
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/// the compilation.
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struct StringTable {
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/// The string table containing all the unique strings used in the output.
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/// It maps a string to an unique ID.
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StringMap<unsigned, BumpPtrAllocator> StrTab;
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/// Total size of the string table when serialized.
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size_t SerializedSize = 0;
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StringTable() = default;
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/// Disable copy.
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StringTable(const StringTable &) = delete;
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StringTable &operator=(const StringTable &) = delete;
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/// Should be movable.
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StringTable(StringTable &&) = default;
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StringTable &operator=(StringTable &&) = default;
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/// Construct a string table from a ParsedStringTable.
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StringTable(const ParsedStringTable &Other);
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/// Add a string to the table. It returns an unique ID of the string.
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std::pair<unsigned, StringRef> add(StringRef Str);
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/// Modify \p R to use strings from this string table. If the string table
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/// does not contain the strings, it adds them.
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void internalize(Remark &R);
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/// Serialize the string table to a stream. It is serialized as a little
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/// endian uint64 (the size of the table in bytes) followed by a sequence of
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/// NULL-terminated strings, where the N-th string is the string with the ID N
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/// in the StrTab map.
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void serialize(raw_ostream &OS) const;
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/// Serialize the string table to a vector. This allows users to do the actual
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/// writing to file/memory/other.
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/// The string with the ID == N should be the N-th element in the vector.
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std::vector<StringRef> serialize() const;
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};
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} // end namespace remarks
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} // end namespace llvm
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#endif // LLVM_REMARKS_REMARKSTRINGTABLE_H
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