Function gmt_validate_modifiers

src/gmt_support.c:17513–17542

! . */

/*! . */
unsigned int gmt_validate_modifiers (struct GMT_CTRL *GMT, const char *string, const char option, const char *valid_modifiers, unsigned int verbosity) {
	/* Looks for modifiers +<mod> in string and making sure <mod> is
	 * only from the set given by valid_modifiers.  if verbosity is GMT_MSQ_QUIET
	 * we file no errors but just returns the number of valid modifiers found.
	 * Otherwise we return the number of invalid modifiers or 0.
	*/
	bool quoted = false;
	unsigned int n_bad = 0, n_good = 0;
	size_t k, len, start = 0;

	if (!string || string[0] == 0) return 0;	/* Nothing to check */
	len = strlen (string);
	for (k = 0; start == 0 && k < (len-1); k++) {
		if (string[k] == '\"') quoted = !quoted;	/* Initially false, becomes true at start of quote, then false when exits the quote */
		if (quoted) continue;		/* Not consider +<mod> inside quoted strings */
		if (string[k] == '+') {	/* Possibly a modifier */
			if (k && string[k-1] == 'e' && isdigit (string[k+1])) continue;	/* Exponential notation, e.g. 1e+5 */
			if (strchr (valid_modifiers, string[k+1]))	/* Found a recognized valid modifier */
				n_good++;
			else {	/* Found an invalid modifier or some part of a filename that has + in it */
				if (option)
					GMT_Report (GMT->parent, verbosity, "Option -%c option: Modifier +%c unrecognized\n", option, string[k+1]);
				else
					GMT_Report (GMT->parent, verbosity, "Modifier +%c unrecognized\n", string[k+1]);
				n_bad++;
			}
		}
	}
	return ((verbosity == GMT_MSG_QUIET) ? n_good : n_bad);
}

/*! . */
double gmt_pol_area (double x[], double y[], uint64_t n) {