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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "net/base/upload_bytes_element_reader.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/stl_util.h" | |
| 9 #include "net/base/io_buffer.h" | |
| 10 #include "net/base/net_errors.h" | |
| 11 | |
| 12 namespace net { | |
| 13 | |
| 14 UploadBytesElementReader::UploadBytesElementReader(const char* bytes, | |
| 15 uint64 length) | |
| 16 : bytes_(bytes), | |
| 17 length_(length), | |
| 18 offset_(0) { | |
| 19 } | |
| 20 | |
| 21 UploadBytesElementReader::~UploadBytesElementReader() { | |
| 22 } | |
| 23 | |
| 24 const UploadBytesElementReader* | |
| 25 UploadBytesElementReader::AsBytesReader() const { | |
| 26 return this; | |
| 27 } | |
| 28 | |
| 29 int UploadBytesElementReader::Init(const CompletionCallback& callback) { | |
| 30 offset_ = 0; | |
| 31 return OK; | |
| 32 } | |
| 33 | |
| 34 uint64 UploadBytesElementReader::GetContentLength() const { | |
| 35 return length_; | |
| 36 } | |
| 37 | |
| 38 uint64 UploadBytesElementReader::BytesRemaining() const { | |
| 39 return length_ - offset_; | |
| 40 } | |
| 41 | |
| 42 bool UploadBytesElementReader::IsInMemory() const { | |
| 43 return true; | |
| 44 } | |
| 45 | |
| 46 int UploadBytesElementReader::Read(IOBuffer* buf, | |
| 47 int buf_length, | |
| 48 const CompletionCallback& callback) { | |
| 49 DCHECK_LT(0, buf_length); | |
| 50 | |
| 51 const int num_bytes_to_read = static_cast<int>( | |
| 52 std::min(BytesRemaining(), static_cast<uint64>(buf_length))); | |
| 53 | |
| 54 // Check if we have anything to copy first, because we are getting | |
| 55 // the address of an element in |bytes_| and that will throw an | |
| 56 // exception if |bytes_| is an empty vector. | |
| 57 if (num_bytes_to_read > 0) | |
| 58 memcpy(buf->data(), bytes_ + offset_, num_bytes_to_read); | |
| 59 | |
| 60 offset_ += num_bytes_to_read; | |
| 61 return num_bytes_to_read; | |
| 62 } | |
| 63 | |
| 64 | |
| 65 UploadOwnedBytesElementReader::UploadOwnedBytesElementReader( | |
| 66 std::vector<char>* data) | |
| 67 : UploadBytesElementReader(vector_as_array(data), data->size()) { | |
| 68 data_.swap(*data); | |
| 69 } | |
| 70 | |
| 71 UploadOwnedBytesElementReader::~UploadOwnedBytesElementReader() {} | |
| 72 | |
| 73 UploadOwnedBytesElementReader* | |
| 74 UploadOwnedBytesElementReader::CreateWithString(const std::string& string) { | |
| 75 std::vector<char> data(string.begin(), string.end()); | |
| 76 return new UploadOwnedBytesElementReader(&data); | |
| 77 } | |
| 78 | |
| 79 } // namespace net | |
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