arg.h (2034B)
1 /* 2 * MIT/Expat license 3 * 4 * Copyright © 2021 Plan 9 Foundation 5 * Copyright © 2026 9front authors 6 * Copyright © 2026 afiw 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to deal 10 * in the Software without restriction, including without limitation the rights 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 * copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in all 16 * copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 * SOFTWARE. 25 */ 26 27 extern char *argv0; 28 29 #define ARGBEGIN for(argv0 = argv[0], argv++, argc--;\ 30 argv[0] != nullptr && argv[0][0] == '-' && argv[0][1] != '\0';\ 31 argc--, argv++){\ 32 char *argh__s = &argv[0][1];\ 33 [[maybe_unused]] char *argh__t;\ 34 char argh__c = '\0';\ 35 if(argh__s[0] == '-' && argh__s[1] == '\0'){\ 36 argc--;\ 37 argv++;\ 38 break;\ 39 }\ 40 while((argh__c = argh__s[0]) != '\0'){\ 41 argh__s++;\ 42 switch(argh__c) 43 44 #define ARGEND }\ 45 } 46 47 #define ARGF() (argh__t = argh__s, argh__s = "",\ 48 (argh__t[0] != '\0' ? argh__t : argv[1] != nullptr ? (argc--, *++argv) : nullptr)) 49 50 #define EARGF() (argh__t = argh__s, argh__s = "",\ 51 (argh__t[0] != '\0' ? argh__t : argv[1] != nullptr ? (argc--, *++argv) : ((x), abort()))) 52 53 #define ARGC() (argh__c)