From eea6659a40b48e23cb660276248c7310ab879613 Mon Sep 17 00:00:00 2001
From: Kartik Agaram <vc@akkartik.com>
Date: Fri, 4 Dec 2020 22:27:12 -0800
Subject: 7331 - hacky way to convert slice to string

---
 apps/advent2020/4b.mu | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'apps/advent2020/4b.mu')

diff --git a/apps/advent2020/4b.mu b/apps/advent2020/4b.mu
index d4a3496e..ffeddb32 100644
--- a/apps/advent2020/4b.mu
+++ b/apps/advent2020/4b.mu
@@ -157,6 +157,26 @@ fn main -> _/ebx: int {
         var pid?/eax: boolean <- slice-equal? key-slice, "pid"
         compare pid?, 0  # false
         break-if-=
+        # convert val
+        var s: (handle array byte)
+        var s2: (addr handle array byte) <- address s
+        _slice-to-string val-slice, s2
+        # check length
+        var len/eax: int <- length s2
+        compare len, 9
+        {
+          break-if-=
+          curr-passport-field-count <- copy 8
+        }
+        # check valid decimal int
+        # parse-decimal-int-from-slice currently returns 0 on invalid parse,
+        # which isn't ideal but suffices for our purposes
+        var val/eax: int <- parse-decimal-int-from-slice val-slice
+        compare val, 0
+        {
+          break-if->
+          curr-passport-field-count <- copy 8
+        }
       }
       loop
     }
-- 
cgit 1.4.1-2-gfad0