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/base/cef_macros.h" 42 #include "include/cef_base.h" 43 #include "include/cef_stream.h" 44 45 /// 46 // Thread safe implementation of the CefReadHandler class for reading an 47 // in-memory array of bytes. 48 /// 49 class CefByteReadHandler : public CefReadHandler { 50 public: 51 /// 52 // Create a new object for reading an array of bytes. An optional |source| 53 // reference can be kept to keep the underlying data source from being 54 // released while the reader exists. 55 /// 56 CefByteReadHandler(const unsigned char* bytes, 57 size_t size, 58 CefRefPtr<CefBaseRefCounted> source); 59 60 // CefReadHandler methods. 61 virtual size_t Read(void* ptr, size_t size, size_t n) OVERRIDE; 62 virtual int Seek(int64 offset, int whence) OVERRIDE; 63 virtual int64 Tell() OVERRIDE; 64 virtual int Eof() OVERRIDE; MayBlock()65 virtual bool MayBlock() OVERRIDE { return false; } 66 67 private: 68 const unsigned char* bytes_; 69 int64 size_; 70 int64 offset_; 71 CefRefPtr<CefBaseRefCounted> source_; 72 73 base::Lock lock_; 74 75 IMPLEMENT_REFCOUNTING(CefByteReadHandler); 76 DISALLOW_COPY_AND_ASSIGN(CefByteReadHandler); 77 }; 78 79 #endif // CEF_INCLUDE_WRAPPER_CEF_BYTE_READ_HANDLER_H_ 80