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#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "aocutils.h"
bool TGvalid(struct TextGrid *tg, unsigned row, unsigned col) {
bool TGvalid(struct TextGrid *tg, unsigned col, unsigned row) {
if (row >= tg->rows) return false;
if (col >= tg->cols) return false;
return true;
}
char *TGcharptr(struct TextGrid *tg, unsigned row, unsigned col) {
if (!TGvalid(tg, row, col)) return NULL;
char *TGcharptr(struct TextGrid *tg, unsigned col, unsigned row) {
if (!TGvalid(tg, col, row)) return NULL;
return tg->data + (row * tg->cols) + col;
}
unsigned TGcol(struct TextGrid *tg, char *p) {
return (p - tg->data) % tg->cols;
}
unsigned TGrow(struct TextGrid *tg, char *p) {
return (p - tg->data) / tg->cols;
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