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 #ifndef _MMAP_INCLUDED_ 16 #define _MMAP_INCLUDED_ 17 18 // 19 // Encapsulate memory mapped files 20 // 21 22 class TMMap { 23 public: 24 TMMap(const char* fileName) : 25 fSize(-1), // -1 is the error value returned by GetFileSize() 26 fp(nullptr), 27 fBuff(0) // 0 is the error value returned by MapViewOfFile() 28 { 29 if ((fp = fopen(fileName, "r")) == NULL) 30 return; 31 char c = getc(fp); 32 fSize = 0; 33 while (c != EOF) { 34 fSize++; 35 c = getc(fp); 36 } 37 if (c == EOF) 38 fSize++; 39 rewind(fp); 40 fBuff = (char*)malloc(sizeof(char) * fSize); 41 int count = 0; 42 c = getc(fp); 43 while (c != EOF) { 44 fBuff[count++] = c; 45 c = getc(fp); 46 } 47 fBuff[count++] = c; 48 } 49 50 char* getData() { return fBuff; } 51 int getSize() { return fSize; } 52 53 ~TMMap() { 54 if (fp != NULL) 55 fclose(fp); 56 } 57 58 private: 59 int fSize; // size of file to map in 60 FILE *fp; 61 char* fBuff; // the actual data; 62 }; 63 64 #endif // _MMAP_INCLUDED_ 65
