1 files changed, 36 insertions, 1 deletions
diff --git a/src/2017/day13/aoc.h b/src/2017/day13/aoc.h
index 5baa78a..5e46b4f 100644
--- a/src/2017/day13/aoc.h
+++ b/src/2017/day13/aoc.h
@@ -3,5 +3,40 @@
 #include <vector>
 
 namespace aoc2017 {
+
+struct scanner {
+  int depth = 0;
+  int range = 0;
+
+  void get_number(const char** pp, int* d) {
+    const char* p = *pp;
+    while (*p >= '0' && *p <= '9') {
+      *d = *d * 10 + *p - '0';
+      p++;
+    }
+    *pp = p;
+  }
+
+  void print() const noexcept {
+    printf("%d %d\n", depth, range);
+  }
+
+  int at_level(int t) const noexcept {
+    return 0;
+  }
+
+  scanner(line_view lv) {
+    int* ds[] = {&depth, &range};
+    int i{0};
+    const char* p = lv.line;
+    while (p < lv.line + lv.length) {
+      if (*p >= '0' && *p <= '9') {
+        get_number(&p, ds[i++]);
+      }
+      p++;
+    }
+  }
+};
+
 std::pair<int64_t, int64_t> day13(line_view);
-}
+} // namespace aoc2017