mirror of
https://github.com/xcat2/xNBA.git
synced 2025-01-05 19:15:05 +00:00
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
#ifndef _GETOPT_H
|
|
#define _GETOPT_H
|
|
|
|
/** @file
|
|
*
|
|
* Parse command-line options
|
|
*
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
|
|
enum getopt_argument_requirement {
|
|
/** Option does not take an argument */
|
|
no_argument = 0,
|
|
/** Option requires an argument */
|
|
required_argument = 1,
|
|
/** Option may have an argument */
|
|
optional_argument = 2,
|
|
};
|
|
|
|
/** A long option, as used for getopt_long() */
|
|
struct option {
|
|
/** Long name of this option */
|
|
const char *name;
|
|
/** Option takes an argument
|
|
*
|
|
* Must be one of @c no_argument, @c required_argument, or @c
|
|
* optional_argument.
|
|
*/
|
|
int has_arg;
|
|
/** Location into which to store @c val, or NULL.
|
|
*
|
|
* See the description for @c val for more details.
|
|
*/
|
|
int *flag;
|
|
/** Value to return
|
|
*
|
|
* If @c flag is NULL, then this is the value that will be
|
|
* returned by getopt_long() when this option is found, and
|
|
* should therefore be set to the equivalent short option
|
|
* character.
|
|
*
|
|
* If @c flag is non-NULL, then this value will be written to
|
|
* the location pointed to by @flag, and getopt_long() will
|
|
* return 0.
|
|
*/
|
|
int val;
|
|
};
|
|
|
|
extern char *optarg;
|
|
extern int optind;
|
|
extern int nextchar;
|
|
extern int optopt;
|
|
|
|
extern int getopt_long ( int argc, char * const argv[], const char *optstring,
|
|
const struct option *longopts, int *longindex );
|
|
|
|
/**
|
|
* Parse command-line options
|
|
*
|
|
* @v argv Argument count
|
|
* @v argv Argument list
|
|
* @v optstring Option specification string
|
|
* @ret option Option found, or -1 for no more options
|
|
*
|
|
* See getopt_long() for full details.
|
|
*/
|
|
static inline int getopt ( int argc, char * const argv[],
|
|
const char *optstring ) {
|
|
static const struct option no_options[] = {
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
return getopt_long ( argc, argv, optstring, no_options, NULL );
|
|
}
|
|
|
|
/**
|
|
* Reset getopt() internal state
|
|
*
|
|
* Due to a limitation of the POSIX getopt() API, it is necessary to
|
|
* add a call to reset_getopt() before each set of calls to getopt()
|
|
* or getopt_long(). This arises because POSIX assumes that each
|
|
* process will parse command line arguments no more than once; this
|
|
* assumption is not valid within Etherboot. We work around the
|
|
* limitation by arranging for execv() to call reset_getopt() before
|
|
* executing the command.
|
|
*/
|
|
static inline void reset_getopt ( void ) {
|
|
optind = 1;
|
|
nextchar = 0;
|
|
}
|
|
|
|
#endif /* _GETOPT_H */
|