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//===- StreamWriter.h - Writes bytes and objects to a stream ----*- 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_MSF_STREAMWRITER_H
#define LLVM_DEBUGINFO_MSF_STREAMWRITER_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/MSF/MSFError.h"
#include "llvm/DebugInfo/MSF/StreamArray.h"
#include "llvm/DebugInfo/MSF/StreamRef.h"
#include "llvm/Support/Error.h"
#include <cstdint>
#include <type_traits>
namespace llvm {
namespace msf {
class StreamWriter {
public:
StreamWriter() = default;
explicit StreamWriter(WritableStreamRef Stream);
Error writeBytes(ArrayRef<uint8_t> Buffer);
Error writeInteger(uint8_t Int);
Error writeInteger(uint16_t Dest);
Error writeInteger(uint32_t Dest);
Error writeInteger(uint64_t Dest);
Error writeInteger(int8_t Int);
Error writeInteger(int16_t Dest);
Error writeInteger(int32_t Dest);
Error writeInteger(int64_t Dest);
Error writeZeroString(StringRef Str);
Error writeFixedString(StringRef Str);
Error writeStreamRef(ReadableStreamRef Ref);
Error writeStreamRef(ReadableStreamRef Ref, uint32_t Size);
template <typename T> Error writeEnum(T Num) {
return writeInteger(
static_cast<typename std::underlying_type<T>::type>(Num));
}
template <typename T> Error writeObject(const T &Obj) {
static_assert(!std::is_pointer<T>::value,
"writeObject should not be used with pointers, to write "
"the pointed-to value dereference the pointer before calling "
"writeObject");
return writeBytes(
ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&Obj), sizeof(T)));
}
template <typename T> Error writeArray(ArrayRef<T> Array) {
if (Array.empty())
return Error::success();
if (Array.size() > UINT32_MAX / sizeof(T))
return make_error<MSFError>(msf_error_code::insufficient_buffer);
return writeBytes(
ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Array.data()),
Array.size() * sizeof(T)));
}
template <typename T, typename U>
Error writeArray(VarStreamArray<T, U> Array) {
return writeStreamRef(Array.getUnderlyingStream());
}
template <typename T> Error writeArray(FixedStreamArray<T> Array) {
return writeStreamRef(Array.getUnderlyingStream());
}
void setOffset(uint32_t Off) { Offset = Off; }
uint32_t getOffset() const { return Offset; }
uint32_t getLength() const { return Stream.getLength(); }
uint32_t bytesRemaining() const { return getLength() - getOffset(); }
private:
WritableStreamRef Stream;
uint32_t Offset = 0;
};
} // end namespace msf
} // end namespace llvm
#endif // LLVM_DEBUGINFO_MSF_STREAMWRITER_H
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