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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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