github.com/yanyiwu/go@v0.0.0-20150106053140-03d6637dbb7f/src/cmd/dist/arg.h (about)

     1  /*
     2  Derived from Inferno include/kern.h.
     3  
     4  http://code.google.com/p/inferno-os/source/browse/include/kern.h
     5  
     6  	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
     7  	Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com).  All rights reserved.
     8  	Portions Copyright © 2009 The Go Authors.  All rights reserved.
     9  
    10  Permission is hereby granted, free of charge, to any person obtaining a copy
    11  of this software and associated documentation files (the "Software"), to deal
    12  in the Software without restriction, including without limitation the rights
    13  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    14  copies of the Software, and to permit persons to whom the Software is
    15  furnished to do so, subject to the following conditions:
    16  
    17  The above copyright notice and this permission notice shall be included in
    18  all copies or substantial portions of the Software.
    19  
    20  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    21  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    22  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    23  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    24  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    25  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    26  THE SOFTWARE.
    27  */
    28  
    29  /* command line */
    30  extern char	*argv0;
    31  #define	ARGBEGIN	for((argv0=(argv0?argv0:*argv)),argv++,argc--;\
    32  			    argv[0] && argv[0][0]=='-' && argv[0][1];\
    33  			    argc--, argv++) {\
    34  				char *_args, *_argt;\
    35  				char _argc;\
    36  				_args = &argv[0][1];\
    37  				if(_args[0]=='-' && _args[1]==0){\
    38  					argc--; argv++; break;\
    39  				}\
    40  				while((_argc = *_args++) != 0)\
    41  				switch(_argc)
    42  #define	ARGEND		_argt=0;USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
    43  #define	ARGF()		(_argt=_args, _args="",\
    44  				(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
    45  #define	EARGF(x)	(_argt=_args, _args="",\
    46  				(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), fatal("usage"), (char*)0)))
    47  
    48  #define	ARGC()		_argc
    49