1 /* 2 * ***************************************************************************** 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2018-2021 Gavin D. Howard and contributors. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * * Redistributions of source code must retain the above copyright notice, this 12 * list of conditions and the following disclaimer. 13 * 14 * * Redistributions in binary form must reproduce the above copyright notice, 15 * this list of conditions and the following disclaimer in the documentation 16 * and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 * 30 * ***************************************************************************** 31 * 32 * Adapted from https://github.com/skeeto/optparse 33 * 34 * ***************************************************************************** 35 * 36 * Definitions for getopt_long() replacement. 37 * 38 */ 39 40 #ifndef BC_OPT_H 41 #define BC_OPT_H 42 43 #include <stdbool.h> 44 #include <stdlib.h> 45 46 /// The data required to parse command-line arguments. 47 typedef struct BcOpt { 48 49 /// The array of arguments. 50 char **argv; 51 52 /// The index of the current argument. 53 size_t optind; 54 55 /// The actual parse option character. 56 int optopt; 57 58 /// Where in the option we are for multi-character single-character options. 59 int subopt; 60 61 /// The option argument. 62 char *optarg; 63 64 } BcOpt; 65 66 /// The types of arguments. This is specially adapted for bc. 67 typedef enum BcOptType { 68 69 /// No argument required. 70 BC_OPT_NONE, 71 72 /// An argument required. 73 BC_OPT_REQUIRED, 74 75 /// An option that is bc-only. 76 BC_OPT_BC_ONLY, 77 78 /// An option that is bc-only that requires an argument. 79 BC_OPT_REQUIRED_BC_ONLY, 80 81 /// An option that is dc-only. 82 BC_OPT_DC_ONLY, 83 84 } BcOptType; 85 86 /// A struct to hold const data for long options. 87 typedef struct BcOptLong { 88 89 /// The name of the option. 90 const char *name; 91 92 /// The type of the option. 93 BcOptType type; 94 95 /// The character to return if the long option was parsed. 96 int val; 97 98 } BcOptLong; 99 100 /** 101 * Initialize data for parsing options. 102 * @param o The option data to initialize. 103 * @param argv The array of arguments. 104 */ 105 void bc_opt_init(BcOpt *o, char **argv); 106 107 /** 108 * Parse an option. This returns a value the same way getopt() and getopt_long() 109 * do, so it returns a character for the parsed option or -1 if done. 110 * @param o The option data. 111 * @param longopts The long options. 112 * @return A character for the parsed option, or -1 if done. 113 */ 114 int bc_opt_parse(BcOpt *o, const BcOptLong *longopts); 115 116 /** 117 * Returns true if the option is `--` and not a long option. 118 * @param a The argument to parse. 119 * @return True if @a a is the `--` option, false otherwise. 120 */ 121 #define BC_OPT_ISDASHDASH(a) \ 122 ((a) != NULL && (a)[0] == '-' && (a)[1] == '-' && (a)[2] == '\0') 123 124 /** 125 * Returns true if the option is a short option. 126 * @param a The argument to parse. 127 * @return True if @a a is a short option, false otherwise. 128 */ 129 #define BC_OPT_ISSHORTOPT(a) \ 130 ((a) != NULL && (a)[0] == '-' && (a)[1] != '-' && (a)[1] != '\0') 131 132 /** 133 * Returns true if the option has `--` at the beginning, i.e., is a long option. 134 * @param a The argument to parse. 135 * @return True if @a a is a long option, false otherwise. 136 */ 137 #define BC_OPT_ISLONGOPT(a) \ 138 ((a) != NULL && (a)[0] == '-' && (a)[1] == '-' && (a)[2] != '\0') 139 140 #endif // BC_OPT_H 141