return a pointer (char *) to a str substring
str_view (struct str * s, int pos, int l)
if (pos < 0) panic ("string position below 0");
if (pos >= s->l) panic ("substring length too large");
if (l < 0) panic ("substring length below 0");
if ((pos + l) > s->l) panic ("substring length too large");
return s->s + pos;
This file is part of Crux.
Crux is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Crux is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Crux. If not, see <http://www.gnu.org/licenses/>.