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94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
//===-- llvm/Remarks/Remark.h - The remark type -----------------*- 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 file provides an interface for parsing remarks in LLVM.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_REMARKS_REMARKPARSER_H
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#define LLVM_REMARKS_REMARKPARSER_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Remarks/Remark.h"
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#include "llvm/Remarks/RemarkFormat.h"
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#include "llvm/Support/Error.h"
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#include <memory>
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namespace llvm {
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namespace remarks {
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class EndOfFileError : public ErrorInfo<EndOfFileError> {
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public:
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static char ID;
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EndOfFileError() {}
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void log(raw_ostream &OS) const override { OS << "End of file reached."; }
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std::error_code convertToErrorCode() const override {
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return inconvertibleErrorCode();
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}
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};
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/// Parser used to parse a raw buffer to remarks::Remark objects.
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struct RemarkParser {
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/// The format of the parser.
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Format ParserFormat;
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/// Path to prepend when opening an external remark file.
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std::string ExternalFilePrependPath;
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RemarkParser(Format ParserFormat) : ParserFormat(ParserFormat) {}
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/// If no error occurs, this returns a valid Remark object.
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/// If an error of type EndOfFileError occurs, it is safe to recover from it
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/// by stopping the parsing.
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/// If any other error occurs, it should be propagated to the user.
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/// The pointer should never be null.
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virtual Expected<std::unique_ptr<Remark>> next() = 0;
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virtual ~RemarkParser() = default;
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};
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/// In-memory representation of the string table parsed from a buffer (e.g. the
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/// remarks section).
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struct ParsedStringTable {
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/// The buffer mapped from the section contents.
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StringRef Buffer;
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/// This object has high changes to be std::move'd around, so don't use a
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/// SmallVector for once.
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std::vector<size_t> Offsets;
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ParsedStringTable(StringRef Buffer);
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/// Disable copy.
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ParsedStringTable(const ParsedStringTable &) = delete;
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ParsedStringTable &operator=(const ParsedStringTable &) = delete;
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/// Should be movable.
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ParsedStringTable(ParsedStringTable &&) = default;
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ParsedStringTable &operator=(ParsedStringTable &&) = default;
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size_t size() const { return Offsets.size(); }
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Expected<StringRef> operator[](size_t Index) const;
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};
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Expected<std::unique_ptr<RemarkParser>> createRemarkParser(Format ParserFormat,
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StringRef Buf);
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Expected<std::unique_ptr<RemarkParser>>
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createRemarkParser(Format ParserFormat, StringRef Buf,
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ParsedStringTable StrTab);
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Expected<std::unique_ptr<RemarkParser>>
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createRemarkParserFromMeta(Format ParserFormat, StringRef Buf,
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Optional<ParsedStringTable> StrTab = None,
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Optional<StringRef> ExternalFilePrependPath = None);
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} // end namespace remarks
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} // end namespace llvm
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#endif // LLVM_REMARKS_REMARKPARSER_H
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