initial commit

1 files changed, 33 insertions, 0 deletions

diff --git a/arg.h b/arg.h
new file mode 100644
index 0000000..5f1f408
--- /dev/null
+++ b/arg.h
@@ -0,0 +1,33 @@
+/* See LICENSE file for copyright and license details. */
+#ifndef ARG_H
+#define ARG_H
+
+extern char *argv0;
+
+/* int main(int argc, char *argv[]) */
+#define ARGBEGIN for (argv0 = *argv, *argv ? (argc--, argv++) : ((void *)0);      \
+                      *argv && (*argv)[0] == '-' && (*argv)[1]; argc--, argv++) { \
+                 	int i_, argused_;                                         \
+                 	if ((*argv)[1] == '-' && !(*argv)[2]) {                   \
+                 		argc--, argv++;                                   \
+                 		break;                                            \
+                 	}                                                         \
+                 	for (i_ = 1, argused_ = 0; (*argv)[i_]; i_++) {           \
+				switch ((*argv)[i_])
+#define ARGEND   		if (argused_) {                                   \
+                 			if ((*argv)[i_ + 1]) {                    \
+                 				break;                            \
+                 			} else {                                  \
+                 				argc--, argv++;                   \
+                 				break;                            \
+                 			}                                         \
+                 		}                                                 \
+                 	}                                                         \
+                 }
+#define ARGC()    ((*argv)[i_])
+#define ARGF_(x) (((*argv)[i_ + 1]) ? (argused_ = 1, &((*argv)[i_ + 1])) :        \
+                  (*(argv + 1))     ? (argused_ = 1, *(argv + 1))        : (x))
+#define EARGF(x) ARGF_(((x), exit(1), (char *)0))
+#define ARGF()   ARGF_((char *)0)
+
+#endif