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#include "aoc.h"
namespace aoc2015 {
// a -> 1
// \\ -> 1
// \" -> 1
// \xXX -> 1
std::pair<int, int> count_day8(line_view lv) {
int t1 = 0;
int t2 = 0;
const char* p1 = lv.line;
const char* p2 = lv.line + lv.length;
const char* p = p1;
while (p != p2) {
if (*p != '\\' || p == p2 - 1) {
t1 += 1;
t2 += 1;
p++;
continue;
} else {
if (*(p + 1) == '\\' || *(p + 1) == '"') {
t1 += 1;
t2 += 4;
p += 2;
continue;
}
if (*(p + 1) == 'x') {
t1 += 1;
t2 += 5;
p += 4;
continue;
}
t1 += 1;
t2 += 1;
p++;
}
}
return {t1, t2};
}
std::pair<int, int> day8(line_view file) {
int t1 = 0;
int t2 = 0;
int t3 = 0;
per_line(file, [&t1, &t2, &t3](line_view lv) {
t1 += lv.length - 1;
auto p = count_day8({lv.line + 1, lv.line + lv.length - 2});
t2 += p.first;
t3 += p.second + 6;
return true;
});
return {t1 - t2, t3 - t1};
}
} // namespace aoc2015
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