Georgios Pinitas | 12be7ab | 2018-07-03 12:06:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017-2018 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #ifndef ARM_COMPUTE_UTILS_COMMANDLINEPARSER |
| 25 | #define ARM_COMPUTE_UTILS_COMMANDLINEPARSER |
| 26 | |
| 27 | #include "Option.h" |
| 28 | #include "arm_compute/core/utils/misc/Utility.h" |
| 29 | #include "support/ToolchainSupport.h" |
| 30 | |
| 31 | #include <iostream> |
| 32 | #include <map> |
| 33 | #include <memory> |
| 34 | #include <regex> |
| 35 | #include <string> |
| 36 | #include <utility> |
| 37 | #include <vector> |
| 38 | |
| 39 | namespace arm_compute |
| 40 | { |
| 41 | namespace utils |
| 42 | { |
| 43 | /** Class to parse command line arguments. */ |
| 44 | class CommandLineParser final |
| 45 | { |
| 46 | public: |
| 47 | /** Default constructor. */ |
| 48 | CommandLineParser() = default; |
| 49 | |
| 50 | /** Function to add a new option to the parser. |
| 51 | * |
| 52 | * @param[in] name Name of the option. Will be available under --name=VALUE. |
| 53 | * @param[in] args Option specific configuration arguments. |
| 54 | * |
| 55 | * @return Pointer to the option. The option is owned by the parser. |
| 56 | */ |
| 57 | template <typename T, typename... As> |
| 58 | T *add_option(const std::string &name, As &&... args); |
| 59 | |
| 60 | /** Function to add a new positional argument to the parser. |
| 61 | * |
| 62 | * @param[in] args Option specific configuration arguments. |
| 63 | * |
| 64 | * @return Pointer to the option. The option is owned by the parser. |
| 65 | */ |
| 66 | template <typename T, typename... As> |
| 67 | T *add_positional_option(As &&... args); |
| 68 | |
| 69 | /** Parses the command line arguments and updates the options accordingly. |
| 70 | * |
| 71 | * @param[in] argc Number of arguments. |
| 72 | * @param[in] argv Arguments. |
| 73 | */ |
| 74 | void parse(int argc, char **argv); |
| 75 | |
| 76 | /** Validates the previously parsed command line arguments. |
| 77 | * |
| 78 | * Validation fails if not all required options are provided. Additionally |
| 79 | * warnings are generated for options that have illegal values or unknown |
| 80 | * options. |
| 81 | * |
| 82 | * @return True if all required options have been provided. |
| 83 | */ |
| 84 | bool validate() const; |
| 85 | |
| 86 | /** Prints a help message for all configured options. |
| 87 | * |
| 88 | * @param[in] program_name Name of the program to be used in the help message. |
| 89 | */ |
| 90 | void print_help(const std::string &program_name) const; |
| 91 | |
| 92 | private: |
| 93 | using OptionsMap = std::map<std::string, std::unique_ptr<Option>>; |
| 94 | using PositionalOptionsVector = std::vector<std::unique_ptr<Option>>; |
| 95 | |
| 96 | OptionsMap _options{}; |
| 97 | PositionalOptionsVector _positional_options{}; |
| 98 | std::vector<std::string> _unknown_options{}; |
| 99 | std::vector<std::string> _invalid_options{}; |
| 100 | }; |
| 101 | |
| 102 | template <typename T, typename... As> |
| 103 | inline T *CommandLineParser::add_option(const std::string &name, As &&... args) |
| 104 | { |
| 105 | auto result = _options.emplace(name, support::cpp14::make_unique<T>(name, std::forward<As>(args)...)); |
| 106 | return static_cast<T *>(result.first->second.get()); |
| 107 | } |
| 108 | |
| 109 | template <typename T, typename... As> |
| 110 | inline T *CommandLineParser::add_positional_option(As &&... args) |
| 111 | { |
| 112 | _positional_options.emplace_back(support::cpp14::make_unique<T>(std::forward<As>(args)...)); |
| 113 | return static_cast<T *>(_positional_options.back().get()); |
| 114 | } |
| 115 | |
| 116 | inline void CommandLineParser::parse(int argc, char **argv) |
| 117 | { |
| 118 | const std::regex option_regex{ "--((?:no-)?)([^=]+)(?:=(.*))?" }; |
| 119 | |
| 120 | const auto set_option = [&](const std::string & option, const std::string & name, const std::string & value) |
| 121 | { |
| 122 | if(_options.find(name) == _options.end()) |
| 123 | { |
| 124 | _unknown_options.push_back(option); |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | const bool success = _options[name]->parse(value); |
| 129 | |
| 130 | if(!success) |
| 131 | { |
| 132 | _invalid_options.push_back(option); |
| 133 | } |
| 134 | }; |
| 135 | |
| 136 | unsigned int positional_index = 0; |
| 137 | |
| 138 | for(int i = 1; i < argc; ++i) |
| 139 | { |
| 140 | std::string mixed_case_opt{ argv[i] }; |
| 141 | int equal_sign = mixed_case_opt.find('='); |
| 142 | int pos = (equal_sign == -1) ? strlen(argv[i]) : equal_sign; |
| 143 | |
| 144 | const std::string option = arm_compute::utility::tolower(mixed_case_opt.substr(0, pos)) + mixed_case_opt.substr(pos); |
| 145 | std::smatch option_matches; |
| 146 | |
| 147 | if(std::regex_match(option, option_matches, option_regex)) |
| 148 | { |
| 149 | // Boolean option |
| 150 | if(option_matches.str(3).empty()) |
| 151 | { |
| 152 | set_option(option, option_matches.str(2), option_matches.str(1).empty() ? "true" : "false"); |
| 153 | } |
| 154 | else |
| 155 | { |
| 156 | // Can't have "no-" and a value |
| 157 | if(!option_matches.str(1).empty()) |
| 158 | { |
| 159 | _invalid_options.emplace_back(option); |
| 160 | } |
| 161 | else |
| 162 | { |
| 163 | set_option(option, option_matches.str(2), option_matches.str(3)); |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | else |
| 168 | { |
| 169 | if(positional_index >= _positional_options.size()) |
| 170 | { |
| 171 | _invalid_options.push_back(mixed_case_opt); |
| 172 | } |
| 173 | else |
| 174 | { |
| 175 | _positional_options[positional_index]->parse(mixed_case_opt); |
| 176 | ++positional_index; |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | inline bool CommandLineParser::validate() const |
| 183 | { |
| 184 | bool is_valid = true; |
| 185 | |
| 186 | for(const auto &option : _options) |
| 187 | { |
| 188 | if(option.second->is_required() && !option.second->is_set()) |
| 189 | { |
| 190 | is_valid = false; |
| 191 | std::cerr << "ERROR: Option '" << option.second->name() << "' is required but not given!\n"; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | for(const auto &option : _positional_options) |
| 196 | { |
| 197 | if(option->is_required() && !option->is_set()) |
| 198 | { |
| 199 | is_valid = false; |
| 200 | std::cerr << "ERROR: Option '" << option->name() << "' is required but not given!\n"; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | for(const auto &option : _unknown_options) |
| 205 | { |
| 206 | std::cerr << "WARNING: Skipping unknown option '" << option << "'!\n"; |
| 207 | } |
| 208 | |
| 209 | for(const auto &option : _invalid_options) |
| 210 | { |
| 211 | std::cerr << "WARNING: Skipping invalid option '" << option << "'!\n"; |
| 212 | } |
| 213 | |
| 214 | return is_valid; |
| 215 | } |
| 216 | |
| 217 | inline void CommandLineParser::print_help(const std::string &program_name) const |
| 218 | { |
| 219 | std::cout << "usage: " << program_name << " \n"; |
| 220 | |
| 221 | for(const auto &option : _options) |
| 222 | { |
| 223 | std::cout << option.second->help() << "\n"; |
| 224 | } |
| 225 | |
| 226 | for(const auto &option : _positional_options) |
| 227 | { |
| 228 | //FIXME: Print help string as well |
| 229 | std::cout << option->name() << "\n"; |
| 230 | } |
| 231 | } |
| 232 | } // namespace utils |
| 233 | } // namespace arm_compute |
| 234 | #endif /* ARM_COMPUTE_UTILS_COMMANDLINEPARSER */ |