/* * Copyright (c) 1999-2000, Image Power, Inc. and the University of *   British Columbia. * Copyright (c) 2001-2002 Michael David Adams. * All rights reserved.  *//* __START_OF_JASPER_LICENSE__ *  * JasPer License Version 2.0 *  * Copyright (c) 1999-2000 Image Power, Inc. * Copyright (c) 1999-2000 The University of British Columbia * Copyright (c) 2001-2003 Michael David Adams *  * All rights reserved. *  * Permission is hereby granted, free of charge, to any person (the * "User") obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: *  * 1.  The above copyright notices and this permission notice (which * includes the disclaimer below) shall be included in all copies or * substantial portions of the Software. *  * 2.  The name of a copyright holder shall not be used to endorse or * promote products derived from the Software without specific prior * written permission. *  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY. * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES, * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH, * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. *  * __END_OF_JASPER_LICENSE__ *//* * Command Line Option Parsing Library * * $Id$ *//******************************************************************************\* Includes.\******************************************************************************/#include <stdio.h>#include <string.h>#include "jasper/jas_getopt.h"#include "jasper/jas_math.h"/******************************************************************************\* Global data.\******************************************************************************/int jas_optind = 0;int jas_opterr = 1;char *jas_optarg = 0;/******************************************************************************\* Code.\******************************************************************************/static jas_opt_t *jas_optlookup(jas_opt_t *opts, char *name){	jas_opt_t *opt;	for (opt = opts; opt->id >= 0 && opt->name; ++opt) {		if (!strcmp(opt->name, name)) {			return opt;		}	}	return 0;}int jas_getopt(int argc, char **argv, jas_opt_t *opts){	char *cp;	int id;	int hasarg;	jas_opt_t *opt;	char *s;	if (!jas_optind) {		jas_optind = JAS_MIN(1, argc);	}	while (jas_optind < argc) {		s = cp = argv[jas_optind];		if (*cp == '-') {			/* We are processing an option. */			++jas_optind;			if (*++cp == '-') {				/* We are processing a long option. */				++cp;				if (*cp == '\0') {					/* This is the end of the options. */					return JAS_GETOPT_EOF;				}				if (!(opt = jas_optlookup(opts, cp))) {					if (jas_opterr) {						fprintf(stderr, "unknown long option %s\n", s);					}					return JAS_GETOPT_ERR;				}				hasarg = (opt->flags & JAS_OPT_HASARG) != 0;				id = opt->id;			} else {				/* We are processing a short option. */				if (strlen(cp) != 1 ||				  !(opt = jas_optlookup(opts, cp))) {					if (jas_opterr) {						fprintf(stderr, "unknown short option %s\n", s);					}					return JAS_GETOPT_ERR;				}				hasarg = (opt->flags & JAS_OPT_HASARG) != 0;				id = opt->id;			}			if (hasarg) {				/* The option has an argument. */				if (jas_optind >= argc) {					if (jas_opterr) {						fprintf(stderr, "missing argument for option %s\n", s);					}					return JAS_GETOPT_ERR;				}				jas_optarg = argv[jas_optind];				++jas_optind;			} else {				/* The option does not have an argument. */				jas_optarg = 0;			}			return id;		} else {			/* We are not processing an option. */			return JAS_GETOPT_EOF;		}	}	return JAS_GETOPT_EOF;}