ref: 574330802775a8417de895c924bf454807295150
parent: d902d0e899a7e69fc1b159db45d2e283cc6f3a51
author: mkf <mkf@cloud9p.org>
date: Thu Jul 4 05:36:01 EDT 2024
add plan 9 ARG macros
--- a/unix.h
+++ b/unix.h
@@ -1,2 +1,54 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\
+ argv[0] && argv[0][0] == '-'\
+ && argv[0][1];\
+ argc--, argv++) {\+ char argc_;\
+ char **argv_;\
+ int brk_;\
+ if (argv[0][1] == '-' && argv[0][2] == '\0') {\+ argv++;\
+ argc--;\
+ break;\
+ }\
+ int i_;\
+ for (i_ = 1, brk_ = 0, argv_ = argv;\
+ argv[0][i_] && !brk_;\
+ i_++) {\+ if (argv_ != argv)\
+ break;\
+ argc_ = argv[0][i_];\
+ switch (argc_)
+
+#define ARGEND }\
+ }
+
+#define ARGC() argc_
+
+#define EARGF(x) ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
+ ((x), abort(), (char *)0) :\
+ (brk_ = 1, (argv[0][i_+1] != '\0')?\
+ (&argv[0][i_+1]) :\
+ (argc--, argv++, argv[0])))
+
+#define ARGF() ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
+ (char *)0 :\
+ (brk_ = 1, (argv[0][i_+1] != '\0')?\
+ (&argv[0][i_+1]) :\
+ (argc--, argv++, argv[0])))
+
+#endif
+
+/* aux functions */
_Noreturn void sysfatal(char *fmt, ...);
int fprint(int fd, char *fmt, ...);