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//
// Copyright 2020 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// InfoLog.h: Defines the gl::InfoLog class to handle the logs generated when
// compiling/linking shaders so useful error messages can be returned to the caller.
#ifndef LIBANGLE_INFOLOG_H_
#define LIBANGLE_INFOLOG_H_
namespace gl
{
class InfoLog : angle::NonCopyable
{
public:
InfoLog();
~InfoLog();
size_t getLength() const;
void getLog(GLsizei bufSize, GLsizei *length, char *infoLog) const;
void appendSanitized(const char *message);
void reset();
// This helper class ensures we append a newline after writing a line.
class StreamHelper : angle::NonCopyable
{
public:
StreamHelper(StreamHelper &&rhs) : mStream(rhs.mStream) { rhs.mStream = nullptr; }
StreamHelper &operator=(StreamHelper &&rhs)
{
std::swap(mStream, rhs.mStream);
return *this;
}
~StreamHelper()
{
// Write newline when destroyed on the stack
if (mStream && !mStream->str().empty())
{
(*mStream) << std::endl;
}
}
template <typename T>
StreamHelper &operator<<(const T &value)
{
(*mStream) << value;
return *this;
}
private:
friend class InfoLog;
StreamHelper(std::stringstream *stream) : mStream(stream) { ASSERT(stream); }
std::stringstream *mStream;
};
template <typename T>
StreamHelper operator<<(const T &value)
{
ensureInitialized();
StreamHelper helper(mLazyStream.get());
helper << value;
return helper;
}
std::string str() const { return mLazyStream ? mLazyStream->str() : ""; }
bool empty() const;
private:
void ensureInitialized()
{
if (!mLazyStream)
{
mLazyStream.reset(new std::stringstream());
}
}
std::unique_ptr<std::stringstream> mLazyStream;
};
} // namespace gl
#endif // LIBANGLE_INFOLOG_H_
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