99 lines
2.0 KiB
C++
99 lines
2.0 KiB
C++
// Copyright (c) 2014 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 "cefclient/bytes_write_handler.h"
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#include <cstdio>
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#include <cstdlib>
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#include "include/wrapper/cef_helpers.h"
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namespace client {
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BytesWriteHandler::BytesWriteHandler(size_t grow)
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: grow_(grow),
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datasize_(grow),
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offset_(0) {
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DCHECK_GT(grow, 0U);
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data_ = malloc(grow);
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DCHECK(data_ != NULL);
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}
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BytesWriteHandler::~BytesWriteHandler() {
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if (data_)
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free(data_);
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}
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size_t BytesWriteHandler::Write(const void* ptr, size_t size, size_t n) {
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base::AutoLock lock_scope(lock_);
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size_t rv;
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if (offset_ + static_cast<int64>(size * n) >= datasize_ &&
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Grow(size * n) == 0) {
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rv = 0;
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} else {
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memcpy(reinterpret_cast<char*>(data_) + offset_, ptr, size * n);
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offset_ += size * n;
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rv = n;
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}
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return rv;
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}
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int BytesWriteHandler::Seek(int64 offset, int whence) {
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int rv = -1L;
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base::AutoLock lock_scope(lock_);
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switch (whence) {
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case SEEK_CUR:
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if (offset_ + offset > datasize_ || offset_ + offset < 0)
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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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int64 offset_abs = std::abs(offset);
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if (offset_abs > datasize_)
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break;
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offset_ = datasize_ - offset_abs;
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rv = 0;
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break;
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}
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case SEEK_SET:
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if (offset > datasize_ || offset < 0)
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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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int64 BytesWriteHandler::Tell() {
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base::AutoLock lock_scope(lock_);
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return offset_;
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}
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int BytesWriteHandler::Flush() {
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return 0;
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}
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size_t BytesWriteHandler::Grow(size_t size) {
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base::AutoLock lock_scope(lock_);
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size_t rv;
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size_t s = (size > grow_ ? size : grow_);
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void* tmp = realloc(data_, datasize_ + s);
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DCHECK(tmp != NULL);
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if (tmp) {
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data_ = tmp;
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datasize_ += s;
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rv = datasize_;
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} else {
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rv = 0;
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}
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return rv;
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}
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} // namespace client
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