1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "Input.h" 16 17 #include <algorithm> 18 #include <cassert> 19 #include <cstring> 20 21 namespace pp 22 { 23 24 Input::Input() : mCount(0), mString(0) 25 { 26 } 27 28 Input::Input(int count, const char* const string[], const int length[]) : 29 mCount(count), 30 mString(string) 31 { 32 assert(mCount >= 0); 33 mLength.reserve(mCount); 34 for (int i = 0; i < mCount; ++i) 35 { 36 int len = length ? length[i] : -1; 37 mLength.push_back(len < 0 ? strlen(mString[i]) : len); 38 } 39 } 40 41 int Input::read(char* buf, int maxSize) 42 { 43 int nRead = 0; 44 while ((nRead < maxSize) && (mReadLoc.sIndex < mCount)) 45 { 46 int size = mLength[mReadLoc.sIndex] - mReadLoc.cIndex; 47 size = std::min(size, maxSize); 48 memcpy(buf + nRead, mString[mReadLoc.sIndex] + mReadLoc.cIndex, size); 49 nRead += size; 50 mReadLoc.cIndex += size; 51 52 // Advance string if we reached the end of current string. 53 if (mReadLoc.cIndex == mLength[mReadLoc.sIndex]) 54 { 55 ++mReadLoc.sIndex; 56 mReadLoc.cIndex = 0; 57 } 58 } 59 return nRead; 60 } 61 62 } // namespace pp 63 64
