cef/libcef/browser/stream_impl.h

160 lines
4.1 KiB
C++

// Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.
#ifndef CEF_LIBCEF_BROWSER_STREAM_IMPL_H_
#define CEF_LIBCEF_BROWSER_STREAM_IMPL_H_
#pragma once
#include "include/cef_stream.h"
#include <stdio.h>
#include <string>
#include "base/synchronization/lock.h"
// Implementation of CefStreamReader for files.
class CefFileReader : public CefStreamReader {
public:
CefFileReader(FILE* file, bool close);
~CefFileReader() override;
size_t Read(void* ptr, size_t size, size_t n) override;
int Seek(int64_t offset, int whence) override;
int64_t Tell() override;
int Eof() override;
bool MayBlock() override { return true; }
protected:
bool close_;
FILE* file_;
base::Lock lock_;
IMPLEMENT_REFCOUNTING(CefFileReader);
};
// Implementation of CefStreamWriter for files.
class CefFileWriter : public CefStreamWriter {
public:
CefFileWriter(FILE* file, bool close);
~CefFileWriter() override;
size_t Write(const void* ptr, size_t size, size_t n) override;
int Seek(int64_t offset, int whence) override;
int64_t Tell() override;
int Flush() override;
bool MayBlock() override { return true; }
protected:
FILE* file_;
bool close_;
base::Lock lock_;
IMPLEMENT_REFCOUNTING(CefFileWriter);
};
// Implementation of CefStreamReader for byte buffers.
class CefBytesReader : public CefStreamReader {
public:
CefBytesReader(void* data, int64_t datasize, bool copy);
~CefBytesReader() override;
size_t Read(void* ptr, size_t size, size_t n) override;
int Seek(int64_t offset, int whence) override;
int64_t Tell() override;
int Eof() override;
bool MayBlock() override { return false; }
void SetData(void* data, int64_t datasize, bool copy);
void* GetData() { return data_; }
size_t GetDataSize() { return offset_; }
protected:
void* data_ = nullptr;
int64_t datasize_ = 0;
bool copy_ = false;
int64_t offset_ = 0;
base::Lock lock_;
IMPLEMENT_REFCOUNTING(CefBytesReader);
};
// Implementation of CefStreamWriter for byte buffers.
class CefBytesWriter : public CefStreamWriter {
public:
explicit CefBytesWriter(size_t grow);
~CefBytesWriter() override;
size_t Write(const void* ptr, size_t size, size_t n) override;
int Seek(int64_t offset, int whence) override;
int64_t Tell() override;
int Flush() override;
bool MayBlock() override { return false; }
void* GetData() { return data_; }
int64_t GetDataSize() { return offset_; }
std::string GetDataString();
protected:
size_t Grow(size_t size);
size_t grow_;
void* data_;
int64_t datasize_;
int64_t offset_ = 0;
base::Lock lock_;
IMPLEMENT_REFCOUNTING(CefBytesWriter);
};
// Implementation of CefStreamReader for handlers.
class CefHandlerReader : public CefStreamReader {
public:
explicit CefHandlerReader(CefRefPtr<CefReadHandler> handler)
: handler_(handler) {}
size_t Read(void* ptr, size_t size, size_t n) override {
return handler_->Read(ptr, size, n);
}
int Seek(int64_t offset, int whence) override {
return handler_->Seek(offset, whence);
}
int64_t Tell() override { return handler_->Tell(); }
int Eof() override { return handler_->Eof(); }
bool MayBlock() override { return handler_->MayBlock(); }
protected:
CefRefPtr<CefReadHandler> handler_;
IMPLEMENT_REFCOUNTING(CefHandlerReader);
};
// Implementation of CefStreamWriter for handlers.
class CefHandlerWriter : public CefStreamWriter {
public:
explicit CefHandlerWriter(CefRefPtr<CefWriteHandler> handler)
: handler_(handler) {}
size_t Write(const void* ptr, size_t size, size_t n) override {
return handler_->Write(ptr, size, n);
}
int Seek(int64_t offset, int whence) override {
return handler_->Seek(offset, whence);
}
int64_t Tell() override { return handler_->Tell(); }
int Flush() override { return handler_->Flush(); }
bool MayBlock() override { return handler_->MayBlock(); }
protected:
CefRefPtr<CefWriteHandler> handler_;
IMPLEMENT_REFCOUNTING(CefHandlerWriter);
};
#endif // CEF_LIBCEF_BROWSER_STREAM_IMPL_H_