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Per Zachary Turner and Mehdi Amini suggestion to make only post-commit reviews. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287355 91177308-0d34-0410-b5e6-96231b3b80d8
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
//===- StreamWriter.h - Writes bytes and objects to a stream ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_MSF_STREAMWRITER_H
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#define LLVM_DEBUGINFO_MSF_STREAMWRITER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/DebugInfo/MSF/MSFError.h"
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#include "llvm/DebugInfo/MSF/StreamArray.h"
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#include "llvm/DebugInfo/MSF/StreamRef.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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#include <type_traits>
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namespace llvm {
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namespace msf {
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class StreamWriter {
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public:
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StreamWriter() = default;
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explicit StreamWriter(WritableStreamRef Stream);
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Error writeBytes(ArrayRef<uint8_t> Buffer);
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Error writeInteger(uint8_t Int);
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Error writeInteger(uint16_t Dest);
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Error writeInteger(uint32_t Dest);
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Error writeInteger(uint64_t Dest);
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Error writeInteger(int8_t Int);
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Error writeInteger(int16_t Dest);
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Error writeInteger(int32_t Dest);
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Error writeInteger(int64_t Dest);
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Error writeZeroString(StringRef Str);
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Error writeFixedString(StringRef Str);
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Error writeStreamRef(ReadableStreamRef Ref);
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Error writeStreamRef(ReadableStreamRef Ref, uint32_t Size);
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template <typename T> Error writeEnum(T Num) {
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return writeInteger(
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static_cast<typename std::underlying_type<T>::type>(Num));
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}
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template <typename T> Error writeObject(const T &Obj) {
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static_assert(!std::is_pointer<T>::value,
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"writeObject should not be used with pointers, to write "
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"the pointed-to value dereference the pointer before calling "
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"writeObject");
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return writeBytes(
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ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&Obj), sizeof(T)));
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}
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template <typename T> Error writeArray(ArrayRef<T> Array) {
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if (Array.empty())
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return Error::success();
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if (Array.size() > UINT32_MAX / sizeof(T))
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return make_error<MSFError>(msf_error_code::insufficient_buffer);
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return writeBytes(
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ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Array.data()),
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Array.size() * sizeof(T)));
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}
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template <typename T, typename U>
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Error writeArray(VarStreamArray<T, U> Array) {
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return writeStreamRef(Array.getUnderlyingStream());
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}
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template <typename T> Error writeArray(FixedStreamArray<T> Array) {
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return writeStreamRef(Array.getUnderlyingStream());
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}
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void setOffset(uint32_t Off) { Offset = Off; }
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uint32_t getOffset() const { return Offset; }
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uint32_t getLength() const { return Stream.getLength(); }
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uint32_t bytesRemaining() const { return getLength() - getOffset(); }
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private:
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WritableStreamRef Stream;
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uint32_t Offset = 0;
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};
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} // end namespace msf
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_MSF_STREAMWRITER_H
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