arguments.c

bool arg_copy(char** dest, char* src){
	(*dest) = calloc(strlen(src) + 1, sizeof(char));
	if(!(*dest)){
		fprintf(stderr, "Failed to allocate memory\n");
		return false;
	}
	strncpy((*dest), src, strlen(src));
	return true;
}

int args_parse(CFG* config, int argc, char** argv){
	unsigned i, c;

	for(i = 0; i < argc ; i++){
		if(!strcmp(argv[i], "-padding")){
			if(++i < argc){
				config->padding = strtoul(argv[i], NULL, 10);
			}
			else{
				fprintf(stderr, "No parameter for padding\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-linespacing")){
			if(++i < argc){
				config->line_spacing = strtoul(argv[i], NULL, 10);
			}
			else{
				fprintf(stderr, "No parameter for line spacing\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-maxsize")){
			if(++i < argc){
				config->max_size = strtoul(argv[i], NULL, 10);
			}
			else{
				fprintf(stderr, "No parameter for max size\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-size")){
			if(++i < argc){
				config->force_size = (double)strtoul(argv[i], NULL, 10);
			}
			else{
				fprintf(stderr, "No parameter for size\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-independent-lines")){
			config->independent_resize = true;
		}
		else if(!strcmp(argv[i], "-disable-text")){
			config->disable_text = true;
		}
		else if(!strcmp(argv[i], "-disable-doublebuffer")){
			config->double_buffer = false;
		}
		else if(!strcmp(argv[i], "-windowed")){
			config->windowed = true;
		}
		//this parameter is now a noop and deprecated, but still recognized for compatability reasons
		else if(!strcmp(argv[i], "-stdin")){
			config->handle_stdin = true;
		}
		else if(!strcmp(argv[i], "-no-stdin")){
			config->handle_stdin = false;
		}
		else if(!strcmp(argv[i], "-debugboxes")){
			config->debug_boxes = true;
		}
		else if(!strcmp(argv[i], "-help") || !strcmp(argv[i], "--help") || !strcmp(argv[i], "-h")){
			config->print_usage = true;
		}
		else if(!strcmp(argv[i], "-fc")){
			if(++i < argc && !(config->text_color)){
				if(!arg_copy(&(config->text_color), argv[i])){
					return false;
				}
			}
			else{
				fprintf(stderr, "No parameter for text color or already defined\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-bc")){
			if(++i < argc && !(config->bg_color)){
				if(!arg_copy(&(config->bg_color), argv[i])){
					return false;
				}
			}
			else{
				fprintf(stderr, "No parameter for window color or already defined\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-dc")){
			if(++i < argc && !(config->debug_color)){
				if(!arg_copy(&(config->debug_color), argv[i])){
					return false;
				}
			}
			else{
				fprintf(stderr, "No parameter for debug color or already defined\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-font")){
			if(++i < argc && !(config->font_name)){
				if(!arg_copy(&(config->font_name), argv[i])){
					return false;
				}
			}
			else{
				fprintf(stderr, "No parameter for font or already defined\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-title")){
			if(++i < argc && !(config->window_name)){
				if(!arg_copy(&(config->window_name), argv[i])){
					return false;
				}
			}
			else{
				fprintf(stderr, "No parameter for window name or already defined\n");
				return -1;
			}
		}
		else if(!strcmp(argv[i], "-align")){
			if(++i < argc){
				switch(argv[i][0]){
					case 'n':
					case 'N':
						switch(argv[i][1]){
							case 'e':
							case 'E':
								config->alignment = ALIGN_NORTHEAST;
								break;
							case 'w':
							case 'W':
								config->alignment = ALIGN_NORTHWEST;
								break;
							default:
								config->alignment = ALIGN_NORTH;
						}
						break;
					case 'e':
					case 'E':
						config->alignment = ALIGN_EAST;
						break;
					case 's':
					case 'S':
						switch(argv[i][1]){
							case 'e':
							case 'E':
								config->alignment = ALIGN_SOUTHEAST;
								break;
							case 'w':
							case 'W':
								config->alignment = ALIGN_SOUTHWEST;
								break;
							default:
								config->alignment = ALIGN_SOUTH;
						}
						break;
					case 'w':
					case 'W':
						config->alignment = ALIGN_WEST;
						break;
					default:
						fprintf(stderr, "Invalid alignment specifier\n");
						return -1;
				}
			}
			else{
				fprintf(stderr, "No parameter for alignment\n");
				return -1;
			}
		}
		else if(!strncmp(argv[i], "-v", 2)){
			for(c = 1; argv[i][c] == 'v'; c++){
			}
			config->verbosity = c - 1;
		}
		else if(!strncmp(argv[i], "--", 2)){
			i++;
			break;
		}
		else{
			break;
		}
	}

	return i + 1;
}

bool args_sane(CFG* config){
	//string memory is allocated in order to be able to
	//simply free() them later

	if(!(config->font_name)){
		errlog(config, LOG_INFO, "No font name specified, using default.\n");
		if(!arg_copy(&(config->font_name), DEFAULT_FONT)){
			return false;
		}
	}

	if(!(config->window_name)){
		errlog(config, LOG_INFO, "No window name specified, using default.\n");
		if(!arg_copy(&(config->window_name), DEFAULT_WINDOWNAME)){
			return false;
		}
	}

	if(!(config->bg_color)){
		errlog(config, LOG_INFO, "No window color specified, using default\n");
		if(!arg_copy(&(config->bg_color), DEFAULT_WINCOLOR)){
			return false;
		}
	}

	if(!(config->text_color)){
		errlog(config, LOG_INFO, "No text color specified, using default\n");
		if(!arg_copy(&(config->text_color), DEFAULT_TEXTCOLOR)){
			return false;
		}
	}

	if(!(config->debug_color)){
		errlog(config, LOG_INFO, "No debug color specified, using default\n");
		if(!arg_copy(&(config->debug_color), DEFAULT_DEBUGCOLOR)){
			return false;
		}
	}

	if(config->verbosity > 1){
		fprintf(stderr, "Config summary\n");
		fprintf(stderr, "Verbosity level: %d\n", config->verbosity);
		fprintf(stderr, "Text padding: %d\n", config->padding);
		fprintf(stderr, "Line spacing: %d\n", config->line_spacing);
		fprintf(stderr, "Maximum size: %d\n", config->max_size);
		fprintf(stderr, "Text alignment: %d\n", config->alignment);
		fprintf(stderr, "Resize lines independently: %s\n", config->independent_resize ? "true":"false");
		fprintf(stderr, "Handle stdin: %s\n", config->handle_stdin ? "true":"false");
		fprintf(stderr, "Draw debug boxes: %s\n", config->debug_boxes ? "true":"false");
		fprintf(stderr, "Disable text draw: %s\n", config->disable_text ? "true":"false");
		fprintf(stderr, "Forced text size: %d\n", (int)config->force_size);
		fprintf(stderr, "Text colorspec: %s\n", config->text_color);
		fprintf(stderr, "Window colorspec: %s\n", config->bg_color);
		fprintf(stderr, "Debug colorspec: %s\n", config->debug_color);
		fprintf(stderr, "Font name: %s\n", config->font_name);
	}

	if(config->print_usage){
		return false;
	}

	return true;
}

void args_cleanup(CFG* config){
	free(config->text_color);
	free(config->bg_color);
	free(config->debug_color);
	free(config->font_name);
	free(config->window_name);
}