1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdio.h> 18 19 #include "utils.h" 20 21 /** Write a 4-byte value to f in little-endian order. */ 22 void Write4(int value, FILE* f) { 23 fputc(value & 0xff, f); 24 fputc((value >> 8) & 0xff, f); 25 fputc((value >> 16) & 0xff, f); 26 fputc((value >> 24) & 0xff, f); 27 } 28 29 /** Write an 8-byte value to f in little-endian order. */ 30 void Write8(long long value, FILE* f) { 31 fputc(value & 0xff, f); 32 fputc((value >> 8) & 0xff, f); 33 fputc((value >> 16) & 0xff, f); 34 fputc((value >> 24) & 0xff, f); 35 fputc((value >> 32) & 0xff, f); 36 fputc((value >> 40) & 0xff, f); 37 fputc((value >> 48) & 0xff, f); 38 fputc((value >> 56) & 0xff, f); 39 } 40 41 int Read2(void* pv) { 42 unsigned char* p = pv; 43 return (int)(((unsigned int)p[1] << 8) | 44 (unsigned int)p[0]); 45 } 46 47 int Read4(void* pv) { 48 unsigned char* p = pv; 49 return (int)(((unsigned int)p[3] << 24) | 50 ((unsigned int)p[2] << 16) | 51 ((unsigned int)p[1] << 8) | 52 (unsigned int)p[0]); 53 } 54 55 long long Read8(void* pv) { 56 unsigned char* p = pv; 57 return (long long)(((unsigned long long)p[7] << 56) | 58 ((unsigned long long)p[6] << 48) | 59 ((unsigned long long)p[5] << 40) | 60 ((unsigned long long)p[4] << 32) | 61 ((unsigned long long)p[3] << 24) | 62 ((unsigned long long)p[2] << 16) | 63 ((unsigned long long)p[1] << 8) | 64 (unsigned long long)p[0]); 65 } 66
