nuclear@12: /*
nuclear@12: glviewvol is an OpenGL 3D volume data viewer
nuclear@12: Copyright (C) 2014  John Tsiombikas <nuclear@member.fsf.org>
nuclear@12: 
nuclear@12: This program is free software: you can redistribute it and/or modify
nuclear@12: it under the terms of the GNU General Public License as published by
nuclear@12: the Free Software Foundation, either version 3 of the License, or
nuclear@12: (at your option) any later version.
nuclear@12: 
nuclear@12: This program is distributed in the hope that it will be useful,
nuclear@12: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@12: GNU General Public License for more details.
nuclear@12: 
nuclear@12: You should have received a copy of the GNU General Public License
nuclear@12: along with this program.  If not, see <http://www.gnu.org/licenses/>.
nuclear@12: */
nuclear@3: #include <stdio.h>
nuclear@3: #include <string.h>
nuclear@3: #include "opt.h"
nuclear@3: 
nuclear@3: static struct {
nuclear@3: 	const char *name;
nuclear@3: 	RendererType rtype;
nuclear@3: } rend[] = {
nuclear@3: 	{ "fast", REND_FAST },
nuclear@3: 	{ 0, REND_NONE }
nuclear@3: };
nuclear@3: 
nuclear@3: Options opt;
nuclear@3: 
nuclear@3: static void init_opt()
nuclear@3: {
nuclear@3: 	opt.fname = 0;
nuclear@3: 	opt.rend_type = REND_FAST;
nuclear@6: 	opt.xsz = 800;
nuclear@6: 	opt.ysz = 800;
nuclear@3: }
nuclear@3: 
nuclear@3: static RendererType renderer_type(const char *name)
nuclear@3: {
nuclear@3: 	for(int i=0; rend[i].name; i++) {
nuclear@3: 		if(strcmp(rend[i].name, name) == 0) {
nuclear@3: 			return rend[i].rtype;
nuclear@3: 		}
nuclear@3: 	}
nuclear@3: 	return REND_NONE;
nuclear@3: }
nuclear@3: 
nuclear@3: int parse_args(int argc, char **argv)
nuclear@3: {
nuclear@3: 	init_opt();
nuclear@3: 
nuclear@3: 	for(int i=1; i<argc; i++) {
nuclear@3: 		if(argv[i][0] == '-') {
nuclear@3: 			if(argv[i][2] == 0) {
nuclear@3: 				switch(argv[i][1]) {
nuclear@6: 				case 's':
nuclear@6: 					if(sscanf(argv[++i], "%dx%d", &opt.xsz, &opt.ysz) != 2) {
nuclear@6: 						fprintf(stderr, "-s must be followed by the window size (WxH)\n");
nuclear@6: 						return -1;
nuclear@6: 					}
nuclear@6: 					break;
nuclear@6: 
nuclear@3: 				case 'r':
nuclear@3: 					if((opt.rend_type = renderer_type(argv[++i])) == REND_NONE) {
nuclear@3: 						if(strcmp(argv[i], "help") == 0) {
nuclear@3: 							printf("available renderers: ");
nuclear@3: 							for(int j=0; rend[j].name; j++) {
nuclear@3: 								printf("%s ", rend[j].name);
nuclear@3: 							}
nuclear@3: 							putchar('\n');
nuclear@3: 							return -1;
nuclear@3: 						}
nuclear@3: 						fprintf(stderr, "unknown renderer type: %s (use -r help to show list of renderers)\n", argv[i]);
nuclear@3: 						return -1;
nuclear@3: 					}
nuclear@3: 					break;
nuclear@3: 
nuclear@3: 				default:
nuclear@3: 					fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@3: 					return -1;
nuclear@3: 				}
nuclear@3: 			} else {
nuclear@3: 				fprintf(stderr, "invalid option: %s\n", argv[i]);
nuclear@3: 				return -1;
nuclear@3: 			}
nuclear@3: 		} else {
nuclear@3: 			if(opt.fname) {
nuclear@3: 				fprintf(stderr, "unexpected argument: %s\n", argv[i]);
nuclear@3: 				return -1;
nuclear@3: 			}
nuclear@3: 			opt.fname = argv[i];
nuclear@3: 		}
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	return 0;
nuclear@3: }