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//===- DebugStringTableSubsection.h - CodeView String Table -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
#define LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
#include "llvm/Support/BinaryStreamRef.h"
#include "llvm/Support/Error.h"
#include <cstdint>
namespace llvm {
class BinaryStreamReader;
namespace codeview {
/// Represents a read-only view of a CodeView string table. This is a very
/// simple flat buffer consisting of null-terminated strings, where strings
/// are retrieved by their offset in the buffer. DebugStringTableSubsectionRef
/// does not own the underlying storage for the buffer.
class DebugStringTableSubsectionRef : public DebugSubsectionRef {
public:
DebugStringTableSubsectionRef();
static bool classof(const DebugSubsectionRef *S) {
return S->kind() == DebugSubsectionKind::StringTable;
}
Error initialize(BinaryStreamRef Contents);
Error initialize(BinaryStreamReader &Reader);
Expected<StringRef> getString(uint32_t Offset) const;
bool valid() const { return Stream.valid(); }
BinaryStreamRef getBuffer() const { return Stream; }
private:
BinaryStreamRef Stream;
};
/// Represents a read-write view of a CodeView string table.
/// DebugStringTableSubsection owns the underlying storage for the table, and is
/// capable of serializing the string table into a format understood by
/// DebugStringTableSubsectionRef.
class DebugStringTableSubsection : public DebugSubsection {
public:
DebugStringTableSubsection();
static bool classof(const DebugSubsection *S) {
return S->kind() == DebugSubsectionKind::StringTable;
}
// If string S does not exist in the string table, insert it.
// Returns the ID for S.
uint32_t insert(StringRef S);
// Return the ID for string S. Assumes S exists in the table.
uint32_t getIdForString(StringRef S) const;
StringRef getStringForId(uint32_t Id) const;
uint32_t calculateSerializedSize() const override;
Error commit(BinaryStreamWriter &Writer) const override;
uint32_t size() const;
StringMap<uint32_t>::const_iterator begin() const {
return StringToId.begin();
}
StringMap<uint32_t>::const_iterator end() const { return StringToId.end(); }
std::vector<uint32_t> sortedIds() const;
private:
DenseMap<uint32_t, StringRef> IdToString;
StringMap<uint32_t> StringToId;
uint32_t StringSize = 1;
};
} // end namespace codeview
} // end namespace llvm
#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
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