1 /* Copyright (c) 2014, Google Inc. 2 * 3 * Permission to use, copy, modify, and/or distribute this software for any 4 * purpose with or without fee is hereby granted, provided that the above 5 * copyright notice and this permission notice appear in all copies. 6 * 7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ 14 15 #include <string> 16 #include <vector> 17 18 #include <limits.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include "internal.h" 24 25 26 bool ParseKeyValueArguments(std::map<std::string, std::string> *out_args, 27 const std::vector<std::string> &args, 28 const struct argument *templates) { 29 out_args->clear(); 30 31 for (size_t i = 0; i < args.size(); i++) { 32 const std::string &arg = args[i]; 33 const struct argument *templ = nullptr; 34 for (size_t j = 0; templates[j].name[0] != 0; j++) { 35 if (strcmp(arg.c_str(), templates[j].name) == 0) { 36 templ = &templates[j]; 37 break; 38 } 39 } 40 41 if (templ == nullptr) { 42 fprintf(stderr, "Unknown argument: %s\n", arg.c_str()); 43 return false; 44 } 45 46 if (out_args->find(arg) != out_args->end()) { 47 fprintf(stderr, "Duplicate argument: %s\n", arg.c_str()); 48 return false; 49 } 50 51 if (templ->type == kBooleanArgument) { 52 (*out_args)[arg] = ""; 53 } else { 54 if (i + 1 >= args.size()) { 55 fprintf(stderr, "Missing argument for option: %s\n", arg.c_str()); 56 return false; 57 } 58 (*out_args)[arg] = args[++i]; 59 } 60 } 61 62 for (size_t j = 0; templates[j].name[0] != 0; j++) { 63 const struct argument *templ = &templates[j]; 64 if (templ->type == kRequiredArgument && 65 out_args->find(templ->name) == out_args->end()) { 66 fprintf(stderr, "Missing value for required argument: %s\n", templ->name); 67 return false; 68 } 69 } 70 71 return true; 72 } 73 74 void PrintUsage(const struct argument *templates) { 75 for (size_t i = 0; templates[i].name[0] != 0; i++) { 76 const struct argument *templ = &templates[i]; 77 fprintf(stderr, "%s\t%s\n", templ->name, templ->description); 78 } 79 } 80 81 bool GetUnsigned(unsigned *out, const std::string &arg_name, 82 unsigned default_value, 83 const std::map<std::string, std::string> &args) { 84 const auto &it = args.find(arg_name); 85 if (it == args.end()) { 86 *out = default_value; 87 return true; 88 } 89 90 const std::string &value = it->second; 91 if (value.empty()) { 92 return false; 93 } 94 95 char *endptr; 96 unsigned long int num = strtoul(value.c_str(), &endptr, 10); 97 if (*endptr || 98 num > UINT_MAX) { 99 return false; 100 } 101 102 *out = num; 103 return true; 104 } 105
