1 // Copyright (c) 2011 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/test_data_stream.h" 6 7 namespace net { 8 9 TestDataStream::TestDataStream() { 10 Reset(); 11 } 12 13 // Fill |buffer| with |length| bytes of data from the stream. 14 void TestDataStream::GetBytes(char* buffer, int length) { 15 while (length) { 16 AdvanceIndex(); 17 int bytes_to_copy = std::min(length, bytes_remaining_); 18 memcpy(buffer, buffer_ptr_, bytes_to_copy); 19 buffer += bytes_to_copy; 20 Consume(bytes_to_copy); 21 length -= bytes_to_copy; 22 } 23 } 24 25 bool TestDataStream::VerifyBytes(const char *buffer, int length) { 26 while (length) { 27 AdvanceIndex(); 28 int bytes_to_compare = std::min(length, bytes_remaining_); 29 if (memcmp(buffer, buffer_ptr_, bytes_to_compare)) 30 return false; 31 Consume(bytes_to_compare); 32 length -= bytes_to_compare; 33 buffer += bytes_to_compare; 34 } 35 return true; 36 } 37 38 void TestDataStream::Reset() { 39 index_ = 0; 40 bytes_remaining_ = 0; 41 buffer_ptr_ = buffer_; 42 } 43 44 // If there is no data spilled over from the previous index, advance the 45 // index and fill the buffer. 46 void TestDataStream::AdvanceIndex() { 47 if (bytes_remaining_ == 0) { 48 // Convert it to ascii, but don't bother to reverse it. 49 // (e.g. 12345 becomes "54321") 50 int val = index_++; 51 do { 52 buffer_[bytes_remaining_++] = (val % 10) + '0'; 53 } while ((val /= 10) > 0); 54 buffer_[bytes_remaining_++] = '.'; 55 } 56 } 57 58 // Consume data from the spill buffer. 59 void TestDataStream::Consume(int bytes) { 60 bytes_remaining_ -= bytes; 61 if (bytes_remaining_) 62 buffer_ptr_ += bytes; 63 else 64 buffer_ptr_ = buffer_; 65 } 66 67 } // namespace net 68 69
