First commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 38 insertions, 0 deletions

diff --git a/arg.h b/arg.h
new file mode 100644
index 0000000..1231320
--- /dev/null
+++ b/arg.h
@@ -0,0 +1,38 @@
+/* Trivial code, not subject to copyright, use as you see fit.
+ * Reimplementation of 20h's arg.h */
+
+#ifndef ARG_H
+#define ARG_H
+
+#include <stddef.h>
+
+
+extern const char *argv0;
+
+
+#define ARGBEGIN        do {\
+                                char arg_h_flag_, arg_h_break_;\
+				if (!argc)\
+					break;\
+                                argv0 = argv[0];\
+                                while (--argc, *++argv && argv[0][0] == '-' && argv[0][1]) {\
+					if (argv[0][1] == '-' && !argv[0][2]) {\
+                                                argv++;\
+                                                argc--;\
+                                                break;\
+                                        }\
+                                        for (arg_h_break_ = 0; !arg_h_break_ && *++*argv;) {\
+                                                switch ((arg_h_flag_ = **argv))
+
+#define ARGEND				}\
+				}\
+			} while (0)
+
+
+#define FLAG()		(arg_h_flag_)
+
+#define ARG()		(arg_h_break_ = 1, argv[0][1] ? &argv[0][1] :\
+			                   argv[1]    ? (argc--, *++argv) :\
+			                                (usage(), NULL))
+
+#endif