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#pragma once

// ------------------------------------------------------------------------
// standard library

#include <sys.h>
#include <arch/types.h>

// TODO: remove dependency system headers
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#include <stdio.h>
#include <wchar.h>
#include <errno.h>
#include <pwd.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>

typedef wchar_t wchar;

/* must be included first */
#include <base/mem.h>
#include <base/string.h>
#include <base/error.h>
#include <base/io.h>

#include <base/fmt.h>
#include <base/utf.h>
#include <base/coro.h>
#include <base/mmap.h>
#include <base/fs.h>
#include <base/flate.h>
#include <base/gz.h>
#include <base/sort.h>
#include <base/rng.h>

// -----------------------------------------------------------------------------
// variable arguments

/* from plan9 libc */

#define	ERRMAX	128 /* max length of error string */

#define	SET(x)	((x)=0)
#define	USED(x)	if(x){}else{}
#ifdef __GNUC__
#	if __GNUC__ >= 3
#		undef USED
#		define USED(x) ((void)(x))
#	endif
#endif

extern char *argv0;
#define	ARGBEGIN	for((argv0?0:(argv0=*argv)),argv++,argc--;            \
			    argv[0] && argv[0][0]=='-' && argv[0][1];                 \
			    argc--, argv++) {                                         \
				byte *_args, *_argt;                                      \
				uint32 _argc;                                             \
				_args = &argv[0][1];                                      \
				if(_args[0]=='-' && _args[1]==0){                         \
					argc--; argv++; break;                                \
				}                                                         \
				_argc = 0;                                                \
				while(*_args && (_args += utf8·decode(_args, &_argc)))\
				switch(_argc)
#define	ARGEND		SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
#define	ARGF()		(_argt=_args, _args="",\
				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
#define	EARGF(x)	(_argt=_args, _args="",\
				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), abort(), (char*)0)))

#define	ARGC()		_argc