1 // Copyright 2015 The Chromium OS 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 "data_reader.h" 6 7 #include <algorithm> 8 9 #include "base/logging.h" 10 11 #include "binary_data_utils.h" 12 13 namespace quipper { 14 15 bool DataReader::ReadDataString(const size_t size, string* dest) { 16 if (size == 0) { 17 dest->clear(); 18 return true; 19 } 20 const size_t orig_size = dest->size(); 21 dest->resize(std::max(size, orig_size)); 22 bool ret = ReadData(size, &(*dest)[0]); 23 dest->resize(ret ? size : orig_size); 24 return ret; 25 } 26 27 bool DataReader::ReadDataValue(const size_t size, const string& value_name, 28 void* dest) { 29 if (ReadData(size, dest)) return true; 30 LOG(ERROR) << "Unable to read " << value_name << ". Requested " << size 31 << " bytes, " << size_ - Tell() << " bytes remaining."; 32 return false; 33 } 34 35 bool DataReader::ReadStringWithSizeFromData(string* dest) { 36 uint32_t len = 0; 37 if (!ReadUint32(&len)) { 38 LOG(ERROR) << "Could not read string length from data."; 39 return false; 40 } 41 42 if (!ReadString(len, dest)) { 43 LOG(ERROR) << "Failed to read string from data. len: " << len; 44 return false; 45 } 46 return true; 47 } 48 49 } // namespace quipper 50
