1 /* 2 * Copyright (C) 2015 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 "utils.h" 18 19 #include <dirent.h> 20 #include <errno.h> 21 #include <stdarg.h> 22 #include <stdio.h> 23 #include <unistd.h> 24 25 #include <base/logging.h> 26 27 void PrintIndented(size_t indent, const char* fmt, ...) { 28 va_list ap; 29 va_start(ap, fmt); 30 printf("%*s", static_cast<int>(indent * 2), ""); 31 vprintf(fmt, ap); 32 va_end(ap); 33 } 34 35 bool IsPowerOfTwo(uint64_t value) { 36 return (value != 0 && ((value & (value - 1)) == 0)); 37 } 38 39 bool NextArgumentOrError(const std::vector<std::string>& args, size_t* pi) { 40 if (*pi + 1 == args.size()) { 41 LOG(ERROR) << "No argument following " << args[*pi] << " option. Try `simpleperf help " 42 << args[0] << "`"; 43 return false; 44 } 45 ++*pi; 46 return true; 47 } 48 49 void GetEntriesInDir(const std::string& dirpath, std::vector<std::string>* files, 50 std::vector<std::string>* subdirs) { 51 if (files != nullptr) { 52 files->clear(); 53 } 54 if (subdirs != nullptr) { 55 subdirs->clear(); 56 } 57 DIR* dir = opendir(dirpath.c_str()); 58 if (dir == nullptr) { 59 PLOG(DEBUG) << "can't open dir " << dirpath; 60 return; 61 } 62 dirent* entry; 63 while ((entry = readdir(dir)) != nullptr) { 64 if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) { 65 continue; 66 } 67 if (entry->d_type == DT_DIR) { 68 if (subdirs != nullptr) { 69 subdirs->push_back(entry->d_name); 70 } 71 } else { 72 if (files != nullptr) { 73 files->push_back(entry->d_name); 74 } 75 } 76 } 77 closedir(dir); 78 } 79
