From f3371fffba9b2857fce35a06942e758c08b4bfa7 Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Fri, 4 Dec 2020 01:38:48 -0500
Subject: Solve day 4 part 2

---
 2020/day04-2.sh | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 2020/day04-2.sh

(limited to '2020')

diff --git a/2020/day04-2.sh b/2020/day04-2.sh
new file mode 100644
index 0000000..5b3c2d3
--- /dev/null
+++ b/2020/day04-2.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+valid=0
+check() {
+	[ \
+		"${#byr}" -eq 4 -a "${byr}" -ge 1920 -a "${byr}" -le 2002 -a \
+		"${#iyr}" -eq 4 -a "${iyr}" -ge 2010 -a "${iyr}" -le 2020 -a \
+		"${#eyr}" -eq 4 -a "${eyr}" -ge 2020 -a "${eyr}" -le 2030 \
+	] || return 0
+	case "${hgt}" in
+		(*cm) [ "${hgt%cm}" -ge 150 -a "${hgt%cm}" -le 193 ] || return 0 ;;
+		(*in) [ "${hgt%in}" -ge 59 -a "${hgt%in}" -le 76 ] || return 0 ;;
+		(*) return 0 ;;
+	esac
+	echo "${hcl}" | egrep -q '^#[0-9a-f]{6}$' || return 0
+	case "${ecl}" in
+		(amb|blu|brn|gry|grn|hzl|oth) ;;
+		(*) return 0 ;;
+	esac
+	[ "${#pid}" -eq 9 ] || return 0
+	return 1
+}
+validate() {
+	check
+	valid=$((valid + $?))
+	unset byr iyr eyr hgt hcl ecl pid cid
+}
+while :; do
+	read -r line
+	last=$?
+	if [ -n "${line}" ]; then
+		for pair in $line; do
+			var=${pair%:*}
+			val=${pair#*:}
+			eval "${var}=${val}"
+		done
+	else
+		validate
+	fi
+	[ $last -ne 0 ] && break
+done
+validate
+echo $valid
-- 
cgit 1.4.1

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<div class='path'>path: <a href='/src/log/?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d&amp;follow=1'>root</a>/<a href='/src/log/www?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d&amp;follow=1'>www</a>/<a href='/src/log/www/causal.agency?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d&amp;follow=1'>causal.agency</a>/<a href='/src/log/www/causal.agency/index.7?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d&amp;follow=1'>index.7</a> (<a href='/src/log/www/causal.agency/index.7?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d'>unfollow</a>)</div><div class='content'><table class='list nowrap'><tr class='nohover'><th></th><th class='left'>Commit message (<a href='/src/log/www/causal.agency/index.7?id=e7b4d18510cf26a0a72fac72604f930d62b4fa7d&amp;showmsg=1&amp;follow=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-09-11 15:11:48 -0400'>2021-09-11</span></td><td><a href='/src/commit/bin/git-comment.pl?id=9d3e8a88a0d06310ff0a9309a5439ab97b8f922f&amp;follow=1'>Also defer printing comment for lone close-parens</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-10 20:06:21 -0400'>2021-09-10</span></td><td><a href='/src/commit/www/text.causal.agency/Makefile?id=ae5823a4cda93b6def9ae017ba3d93daa2eceeb9&amp;follow=1'>Publish "git-comment"</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-10 17:10:15 -0400'>2021-09-10</span></td><td><a href='/src/commit/bin/man1/git-comment.1?id=4c6cb6a661e970cf6951f627390f65b59ec8a7de&amp;follow=1'>Add git comment --pretty option</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 23:32:51 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/git-comment.pl?id=774decfc311710c12a27a3c5cd827c96fea4d332&amp;follow=1'>Defer printing comment if line is blank or closing brace</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 22:17:13 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/man1/git-comment.1?id=1a5ecb6c6d42d8e0a9284897c90d6047f8ad8842&amp;follow=1'>Up default min-repeat to 30 lines</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 22:11:15 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/git-comment.pl?id=5908b0ae469e5d20d6b05eb3aabf2ea7b3d65311&amp;follow=1'>Handle dirty lines in git-comment</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 21:59:30 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/man1/git-comment.1?id=a237a866bba3b7c4618ccef1347c0c01009e66f3&amp;follow=1'>Document and install git-comment</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 21:05:33 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/git-comment.pl?id=ce5d7b18c0143dda7b3c9a78260b6e5ce7eec11a&amp;follow=1'>Add repeat and all options to git-comment</a></td><td>June McEnroe</td></tr>
<tr><td><span title='2021-09-08 19:05:36 -0400'>2021-09-08</span></td><td><a href='/src/commit/bin/git-comment.pl?id=c06e03fe68c3f55ff251607a534c75ac5d419af8&amp;follow=1'>Add group threshold to git-comment</a></td><td>June McEnroe