61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
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/* gopt.h version 8.1: tom.viza@gmail.com PUBLIC DOMAIN 2003-8 */
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/*
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I, Tom Vajzovic, am the author of this software and its documentation and
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permanently abandon all copyright and other intellectual property rights in
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them, including the right to be identified as the author.
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I am fairly certain that this software does what the documentation says it
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does, but I cannot guarantee that it does, or that it does what you think it
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should, and I cannot guarantee that it will not have undesirable side effects.
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You are free to use, modify and distribute this software as you please, but
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you do so at your own risk. If you remove or hide this warning then you are
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responsible for any problems encountered by people that you make the software
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available to.
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Before modifying or distributing this software I ask that you would please
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read http://www.purposeful.co.uk/tfl/
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*/
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#ifndef GOPT_H_INCLUDED
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#define GOPT_H_INCLUDED
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#define GOPT_ONCE 0
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#define GOPT_REPEAT 1
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#define GOPT_NOARG 0
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#define GOPT_ARG 2
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#define gopt_start(...) (const void*)( const struct { int k; int f; const char *s; const char*const*l; }[]){ __VA_ARGS__, {0}}
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#define gopt_option(k,f,s,l) { k, f, s, l }
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#define gopt_shorts( ... ) (const char*)(const char[]){ __VA_ARGS__, 0 }
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#define gopt_longs( ... ) (const char**)(const char*[]){ __VA_ARGS__, NULL }
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void *gopt_sort( int *argc, const char **argv, const void *opt_specs );
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/* returns a pointer for use in the following calls
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* prints to stderr and call exit() on error
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*/
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size_t gopt( const void *opts, int key );
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/* returns the number of times the option was specified
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* which will be 0 or 1 unless GOPT_REPEAT was used
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*/
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size_t gopt_arg( const void *opts, int key, const char **arg );
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/* returns the number of times the option was specified
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* writes a pointer to the option argument from the first (or only) occurance to *arg
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*/
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const char *gopt_arg_i( const void *opts, int key, size_t i );
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/* returns a pointer to the ith (starting at zero) occurance
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* of the option, or NULL if it was not specified that many times
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*/
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size_t gopt_args( const void *opts, int key, const char **args, size_t args_len );
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/* returns the number of times the option was specified
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* writes pointers to the option arguments in the order of occurance to args[].
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* writes at most args_len pointers
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* if the return value is less than args_len, also writes a null pointer
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*/
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void gopt_free( void *opts );
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/* releases memory allocated in the corresponding call to gopt_sort()
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* opts can no longer be used
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*/
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#endif /* GOPT_H_INCLUDED */
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