Function parse

src/grdvector.c:172–420

}

static int parse (struct GMT_CTRL *GMT, struct GRDVECTOR_CTRL *Ctrl, struct GMT_OPTION *options) {
	/* This parses the options provided to grdvector and sets parameters in Ctrl.
	 * Note Ctrl has already been initialized and non-zero default values set.
	 * Any GMT common options will override values set previously by other commands.
	 * It also replaces any file names specified as input or output with the data ID
	 * returned when registering these sources/destinations with the API.
	 */

	unsigned int n_errors = 0, n_files = 0;
	int j;
	size_t len;
	char txt_a[GMT_LEN256] = {""}, txt_b[GMT_LEN256] = {""}, txt_c[GMT_LEN256] = {""}, *c = NULL;
	struct GMT_OPTION *opt = NULL;
	struct GMTAPI_CTRL *API = GMT->parent;

	/* First determine what type of vector to plot */
	for (opt = options; opt; opt = opt->next) {
		if (opt->option != 'S') continue;	/* Skip until we find -S */
		j = (strchr ("li", opt->arg[0])) ? 1 : 0;	/* Possibly skip leading -Si or -Sl */
		while (opt->arg[j] && strchr (GMT_LEN_UNITS GMT_DIM_UNITS, opt->arg[j]) == NULL) j++;	/* Skip digits etc until we hit first unit or end of string */
		if (opt->arg[j] && strchr (GMT_LEN_UNITS, opt->arg[j]) && gmt_M_is_geographic (GMT, GMT_IN))
			Ctrl->S.symbol = '=';	/* Selected a geo-vector */
		else if (opt->arg[j] && strchr (GMT_DIM_UNITS, opt->arg[j]))
			Ctrl->S.symbol = 'v';	/* Selected a Cartesian vector */
		else {	/* No useful info, select Cartesian with a warning */
			GMT_Report (API, GMT_MSG_WARNING, "No units specified in -S. Selecting Cartesian vector symbol\n");
			Ctrl->S.symbol = 'v';	/* Selected a Cartesian vector */
		}
	}

	for (opt = options; opt; opt = opt->next) {	/* Process all the options given */

		switch (opt->option) {
			case '<':	/* Input file (only two are accepted) */
				Ctrl->In.active = true;
				if (n_files >= 2) {n_errors++; continue; }
				n_errors += gmt_get_required_file (GMT, opt->arg, opt->option, 0, GMT_IS_GRID, GMT_IN, GMT_FILE_REMOTE, &(Ctrl->In.file[n_files]));
				n_files++;
				break;

			/* Processes program-specific parameters */

			case 'A':	/* Polar data grids */
				n_errors += gmt_M_repeated_module_option (API, Ctrl->A.active);
				n_errors += gmt_get_no_argument (GMT, opt->arg, opt->option, 0);
				break;
			case 'C':	/* Vary symbol color with z */
				n_errors += gmt_M_repeated_module_option (API, Ctrl->C.active);
				gmt_M_str_free (Ctrl->C.file);
				if (opt->arg[0]) Ctrl->C.file = strdup (opt->arg);
				gmt_cpt_interval_modifier (GMT, &(Ctrl->C.file), &(Ctrl->C.dz));
				break;
			case 'E':	/* Center vectors [OBSOLETE; use modifier +jc in -Q ] */
				if (gmt_M_compat_check (GMT, 4)) {
					GMT_Report (API, GMT_MSG_COMPAT, "Option -E is deprecated; use modifier +jc in -Q instead.\n");
					Ctrl->Q.S.v.status |= PSL_VEC_JUST_C;
				}
				else