Bash: 2022/day 4 part 1

2022/day04/aoc.bash

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+#!/usr/bin/env bash
+#
+# aoc.bash: Advent of Code 2022, day 3
+#
+# Copyright (C) 2022 Bruno Raoult ("br")
+# Licensed under the GNU General Public License v3.0 or later.
+# Some rights reserved. See COPYING.
+#
+# You should have received a copy of the GNU General Public License along with this
+# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
+
+. common.bash
+
+export LANG=C
+declare -a sections
+
+parse() {
+    local -a _arr
+    local -i _tmp
+
+    while IFS=-, read -ra _arr; do
+        # arrange the two sections so that the lowest is the first
+        printf "_arr=%s\n" "${_arr[*]}"
+        if ((_arr[0] > _arr[2])); then
+            ((_tmp=_arr[0], _arr[0]=_arr[2], _arr[2]=_tmp))
+            ((_tmp=_arr[1], _arr[1]=_arr[3], _arr[3]=_tmp))
+            printf "\t->%s\n" "${_arr[*]}"
+        fi
+        sections+=("${_arr[*]}")
+    done
+    #readarray -t input
+}
+
+part1() {
+    declare -ig res=0
+    local -a _sect
+
+    for line in "${sections[@]}"; do
+        # shellcheck disable=SC2206
+        _sect=($line)
+        (( _sect[1] >= _sect[3] ||
+               (_sect[0] == _sect[2] && _sect[3] >= _sect[1]) )) && (( res++ ))
+    done
+}
+
+solve() {
+    if (($1 == 1)); then
+        part1
+    else
+        part2
+    fi
+}
+
+main "$@"
+exit 0