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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/base/upload_bytes_element_reader.h"
#include "base/logging.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace net {
UploadBytesElementReader::UploadBytesElementReader(const char* bytes,
uint64_t length)
: bytes_(bytes), length_(length), offset_(0) {
}
UploadBytesElementReader::~UploadBytesElementReader() {
}
const UploadBytesElementReader*
UploadBytesElementReader::AsBytesReader() const {
return this;
}
int UploadBytesElementReader::Init(const CompletionCallback& callback) {
offset_ = 0;
return OK;
}
uint64_t UploadBytesElementReader::GetContentLength() const {
return length_;
}
uint64_t UploadBytesElementReader::BytesRemaining() const {
return length_ - offset_;
}
bool UploadBytesElementReader::IsInMemory() const {
return true;
}
int UploadBytesElementReader::Read(IOBuffer* buf,
int buf_length,
const CompletionCallback& callback) {
DCHECK_LT(0, buf_length);
const int num_bytes_to_read = static_cast<int>(
std::min(BytesRemaining(), static_cast<uint64_t>(buf_length)));
// Check if we have anything to copy first, because we are getting
// the address of an element in |bytes_| and that will throw an
// exception if |bytes_| is an empty vector.
if (num_bytes_to_read > 0)
memcpy(buf->data(), bytes_ + offset_, num_bytes_to_read);
offset_ += num_bytes_to_read;
return num_bytes_to_read;
}
UploadOwnedBytesElementReader::UploadOwnedBytesElementReader(
std::vector<char>* data)
: UploadBytesElementReader(data->data(), data->size()) {
data_.swap(*data);
}
UploadOwnedBytesElementReader::~UploadOwnedBytesElementReader() {}
UploadOwnedBytesElementReader*
UploadOwnedBytesElementReader::CreateWithString(const std::string& string) {
std::vector<char> data(string.begin(), string.end());
return new UploadOwnedBytesElementReader(&data);
}
} // namespace net
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