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-rw-r--r--src/arg.h78
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diff --git a/src/arg.h b/src/arg.h
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-/**
- * Copyright © 2016 Mattias Andrée <maandree@member.fsf.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-
-/**
- * The name of the process.
- */
-extern char *argv0;
-
-
-
-/**
- * Start command line parsing.
- *
- * `argv` and `argc` must be available as given to `main`.
- * The global variable `argv0` must be declare (not necessary
- * the the same file) and will be set to `argv[0]`.
- *
- * Only short options and "--" are supported. Short options
- * may start with a '+', in which case `plus` will be 1.
- *
- * @example
- * ARGBEGIN {
- * case 'a': printf("%s\n", plus ? "+a" : "-a"); break;
- * case 'b': if (plus) usage(1); printf("-b\n"); break;
- * case 'c': if (plus) printf("+c\n"); else printf("-c %s\n", ARGF()); break;
- * default: usage(1); break;
- * } ARGEND;
- */
-#define ARGBEGIN \
-do { \
- for (argv0 = *argv++, argc -= !!argv0; *argv; argv++, argc--) { \
- int plus = argv[0][0] == '+', next__ = 0; \
- if (((argv[0][0] != '-') && !plus) || (argv[0][1] == (plus ? '+' : '-'))) { \
- if ((argv[0][0] == argv[0][1]) && (argv[0][1] == '-') && (argv[0][2] == '\0')) \
- argc--, argv++; \
- break; \
- } \
- for (argv[0]++; argv[0][0] && !next__;) { \
- switch (*(argv[0])++)
-
-/**
- * End of command line parsing,
- */
-#define ARGEND \
- } \
- } \
-} while (0)
-
-/**
- * Get the argument of the current option.
- * Do not use more once per option.
- *
- * The function `noreturn void usage(int)` must be available.
- * `usage` shall exit if its argument is `1`.
- *
- * @return The argument of the current option.
- */
-#define ARGF() \
- (next__ = 1, argv[0][0] ? (argv[0]) \
- : (argv++, (argv[0] ? (argc--, argv[0]) \
- : (usage(1), NULL))))
-