63 lines
1.3 KiB
C++
63 lines
1.3 KiB
C++
// Copyright (c) 2010 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that
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// can be found in the LICENSE file.
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#include "include/cef_wrapper.h"
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#include "base/logging.h"
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CefByteReadHandler::CefByteReadHandler(const unsigned char* bytes, size_t size,
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CefRefPtr<CefBase> source)
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: bytes_(bytes), size_(size), offset_(0), source_(source)
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{
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}
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size_t CefByteReadHandler::Read(void* ptr, size_t size, size_t n)
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{
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AutoLock lock_scope(this);
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size_t s = (size_ - offset_) / size;
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size_t ret = std::min(n, s);
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memcpy(ptr, bytes_ + offset_, ret * size);
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offset_ += ret * size;
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return ret;
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}
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int CefByteReadHandler::Seek(long offset, int whence)
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{
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int rv = -1L;
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AutoLock lock_scope(this);
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switch(whence) {
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case SEEK_CUR:
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if(offset_ + offset > size_)
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break;
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offset_ += offset;
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rv = 0;
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break;
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case SEEK_END:
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if(offset > static_cast<long>(size_))
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break;
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offset_ = size_ - offset;
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rv = 0;
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break;
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case SEEK_SET:
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if(offset > static_cast<long>(size_))
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break;
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offset_ = offset;
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rv = 0;
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break;
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}
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return rv;
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}
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long CefByteReadHandler::Tell()
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{
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AutoLock lock_scope(this);
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return offset_;
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}
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int CefByteReadHandler::Eof()
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{
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AutoLock lock_scope(this);
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return (offset_ >= size_);
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}
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