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/*
Copyright (C) 2018- The University of Notre Dame
This software is distributed under the GNU General Public License.
See the file COPYING for details.
*/
/** @file jx_getopt.h Pull command line args from a JSON document.
*
* This is a wrapper around getopt_long that supports reading arguments
* from a JX object during command line parsing. The object's keys are
* interpreted as long option names, and the values are stored in optarg.
* Currently only string, integer, float, and boolean values are written
* to optarg. Other value types result in optarg being set to NULL. To
* access the raw JX struture provided as an option argument, callers
* can inspect jx_optarg. JX-aware programs can check jx_optarg when
* reading JX values from the command line to simplify parsing and avoid
* quoting issues.
*/
#ifndef JX_GETOPT_H
#define JX_GETOPT_H
#include <unistd.h>
#include <getopt.h>
#include "jx.h"
extern struct jx *jx_optarg;
/** Process command lines from a JX document.
* The pushed args will be processesed next, before any remaining command line
* args or previously pushed JX args.
* @param j The args to process.
*/
void jx_getopt_push(struct jx *j);
/** Parse the next argument.
* If there are no JX args to be processed, this is the same as calling
* getopt_long() directly.
* @returns 0 on error. Do not use this as a valid option val.
*/
int jx_getopt(int argc, char *const argv[], const char *optstring, const struct option *longopts, int *longindex);
#endif
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