1 // Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved. 2 // 3 // Redistribution and use in source and binary forms, with or without 4 // modification, are permitted provided that the following conditions are 5 // met: 6 // 7 // * Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // * Redistributions in binary form must reproduce the above 10 // copyright notice, this list of conditions and the following disclaimer 11 // in the documentation and/or other materials provided with the 12 // distribution. 13 // * Neither the name of Google Inc. nor the name Chromium Embedded 14 // Framework nor the names of its contributors may be used to endorse 15 // or promote products derived from this software without specific prior 16 // written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 // 30 // --------------------------------------------------------------------------- 31 // 32 // The contents of this file are only available to applications that link 33 // against the libcef_dll_wrapper target. 34 // 35 36 #ifndef CEF_INCLUDE_WRAPPER_CEF_BYTE_READ_HANDLER_H_ 37 #define CEF_INCLUDE_WRAPPER_CEF_BYTE_READ_HANDLER_H_ 38 #pragma once 39 40 #include "include/base/cef_lock.h" 41 #include "include/cef_base.h" 42 #include "include/cef_stream.h" 43 44 /// 45 // Thread safe implementation of the CefReadHandler class for reading an 46 // in-memory array of bytes. 47 /// 48 class CefByteReadHandler : public CefReadHandler { 49 public: 50 /// 51 // Create a new object for reading an array of bytes. An optional |source| 52 // reference can be kept to keep the underlying data source from being 53 // released while the reader exists. 54 /// 55 CefByteReadHandler(const unsigned char* bytes, 56 size_t size, 57 CefRefPtr<CefBaseRefCounted> source); 58 59 CefByteReadHandler(const CefByteReadHandler&) = delete; 60 CefByteReadHandler& operator=(const CefByteReadHandler&) = delete; 61 62 // CefReadHandler methods. 63 virtual size_t Read(void* ptr, size_t size, size_t n) override; 64 virtual int Seek(int64 offset, int whence) override; 65 virtual int64 Tell() override; 66 virtual int Eof() override; MayBlock()67 virtual bool MayBlock() override { return false; } 68 69 private: 70 const unsigned char* bytes_; 71 int64 size_; 72 int64 offset_; 73 CefRefPtr<CefBaseRefCounted> source_; 74 75 base::Lock lock_; 76 77 IMPLEMENT_REFCOUNTING(CefByteReadHandler); 78 }; 79 80 #endif // CEF_INCLUDE_WRAPPER_CEF_BYTE_READ_HANDLER_H_ 81