1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 // MARKER(update_precomp.py): autogen include statement, do not remove 25 #include "precompiled_shell.hxx" 26 #include <stdexcept> 27 #include <osl/diagnose.h> 28 #include "cmdline.hxx" 29 30 //--------------------------------- 31 /** Simple command line abstraction 32 */ 33 34 //################################ 35 // Creation 36 //################################ 37 38 39 CommandLine::CommandLine(size_t argc, char* argv[], const std::string& ArgPrefix) : 40 m_argc(argc), 41 m_argv(argv), 42 m_argprefix(ArgPrefix) 43 { 44 } 45 46 47 //################################ 48 // Query 49 //################################ 50 51 52 /** Return the argument count 53 */ 54 size_t CommandLine::get_arg_count() const 55 { 56 return m_argc; 57 } 58 59 /** Return an argument by index 60 This method doesn't skip argument 61 names if any, so if the second 62 argument is an argument name the 63 function nevertheless returns it. 64 65 @precond 0 <= Index < GetArgumentCount 66 67 @throws std::out_of_range exception 68 if the given index is to high 69 */ 70 std::string CommandLine::get_arg(size_t Index) const 71 { 72 OSL_PRECOND(Index < m_argc, "Index out of range"); 73 74 if (Index > (m_argc - 1)) 75 throw std::out_of_range("Invalid index"); 76 77 return m_argv[Index]; 78 } 79 80 81 /** Returns all argument name found in the 82 command line. An argument will be identified 83 by a specified prefix. The standard prefix 84 is '-'. 85 If the are no argument names the returned 86 container is empty. 87 */ 88 StringListPtr_t CommandLine::get_arg_names() const 89 { 90 StringListPtr_t arg_cont(new StringList_t()); 91 92 for (size_t i = 0; i < m_argc; i++) 93 { 94 std::string argn = m_argv[i]; 95 96 if (is_arg_name(argn)) 97 arg_cont->push_back(argn); 98 } 99 100 return arg_cont; 101 } 102 103 /** Returns an argument by name. If there are 104 duplicate argument names in the command line, 105 the first one wins. 106 Argument name and the argument value must be separated 107 by spaces. If the argument value starts with an 108 argument prefix use quotes else the return value is 109 an empty string because the value will be interpreted 110 as the next argument name. 111 If an argument value contains spaces use quotes. 112 113 @precond GetArgumentNames() -> has element ArgumentName 114 115 @throws std::invalid_argument exception 116 if the specified argument could not be 117 found 118 */ 119 std::string CommandLine::get_arg(const std::string& ArgumentName) const 120 { 121 std::string arg_value; 122 size_t i; 123 for ( i = 0; i < m_argc; i++) 124 { 125 std::string arg = m_argv[i]; 126 127 if (ArgumentName == arg && ((i+1) < m_argc) && !is_arg_name(m_argv[i+1])) 128 { 129 arg_value = m_argv[i+1]; 130 break; 131 } 132 } 133 134 if (i == m_argc) 135 throw std::invalid_argument("Invalid argument name"); 136 137 return arg_value; 138 } 139 140 141 //################################ 142 // Command 143 //################################ 144 145 146 /** Set the prefix used to identify arguments in 147 the command line. 148 149 @precond prefix is not empty 150 151 @throws std::invalid_argument exception if 152 the prefix is empty 153 */ 154 void CommandLine::set_arg_prefix(const std::string& Prefix) 155 { 156 OSL_PRECOND(Prefix.length(), "Empty argument prefix!"); 157 158 if (0 == Prefix.length()) 159 throw std::invalid_argument("Empty argument prefix not allowed"); 160 161 m_argprefix = Prefix; 162 } 163 164 165 /** Returns whether a given argument is an argument name 166 */ 167 bool CommandLine::is_arg_name(const std::string& Argument) const 168 { 169 return (0 == Argument.compare(0, m_argprefix.length(), m_argprefix)); 170 } 171 172 /* vim: set noet sw=4 ts=4: */ 173