canon

For each character in string, if the character is not in valid_chars, replaces the character with substitutor .

Modifies string in place, and return string itself, not a copy. The return value is to allow nesting such as: ```C g_ascii_strup (g_strcanon (str, "abc", '?')) ```

In order to modify a copy, you may use [func@GLib.strdup]: ```C reformatted = g_strcanon (g_strdup (const_str), "abc", '?'); … g_free ( reformatted); ```

Example: Replace invalid chars:

public static int main (string[] args) {
	string str = "glib-2.0";
	// Output: ``?????2.0``
	str.canon ("0123456789.", '?');
	print ("%s\n", str);
	return 0;
}

valac --pkg glib-2.0 string.canon.vala

Parameters:

valid_chars	bytes permitted in string
substitutor	replacement character for disallowed bytes
string	a nul-terminated array of bytes

Returns:

the modified string