Initial commit

.gitignore

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+results.txt
+.*.sw?
+*.so

README.md

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+AWK solutions for Advent of Code 2023
+=====================================
+I decided to implement the Advent of Code challenges this year in AWK. This
+daily programming challenge can be found at http://www.adventofcode.com.
+
+Here are my solutions. There is a folder for each day, each containing:
+
+| file         | description                                 |
+| ------------ | ------------------------------------------- |
+| Makefile     | Makefile that runs a regression by default  |
+| expected.txt | Expected results of regression test         |
+| sample.txt   | sample input from the challenge description |
+| input.txt    | test input from the challenge description   |
+| one.awk      | first solution                              |
+| two.awk      | second solution                             |
+| *            | additional files as needed                  |
+
+Jerry Williams
+gsw@wfam.info

clean.sh

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+#!/bin/bash
+cd $(dirname $0)
+for d in day*
+do
+    echo + $d
+    make -C $d clean
+done

day00/Makefile

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+.PHONY: test clean update
+
+test : expected.txt results.txt
+	diff -s expected.txt results.txt
+
+PROGRAMS = one.awk two.awk
+INPUTS = sample.txt input.txt
+
+results.txt : $(PROGRAMS) $(INPUTS)
+	./one.awk sample.txt > $@
+	./one.awk input.txt >> $@
+	./two.awk sample.txt >> $@
+	./two.awk input.txt >> $@
+	cat $@
+
+clean:
+	$(RM) results.txt
+
+update: results.txt
+	cp $< expected.txt

day00/expected.txt

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+0
+2
+0
+2

day00/input.txt

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+1
+2

day00/one.awk

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+#!/usr/bin/env gawk -f
+BEGIN {
+}
+{
+    if (_error) {
+        print "DATA ERROR"
+        exit _exit=1
+    }
+}
+END {
+    if (_exit) {
+        exit _exit
+    }
+    print NR
+}

day00/two.awk

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+#!/usr/bin/env gawk -f
+BEGIN {
+}
+{
+    if (_error) {
+        print "DATA ERROR"
+        exit _exit=1
+    }
+}
+END {
+    if (_exit) {
+        exit _exit
+    }
+    print NR
+}

regress.sh

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+#!/bin/bash
+cd $(dirname $0)
+export PREVENT_LONG_RUN=1
+for d in day*
+do
+    echo + $d
+    make -C $d
+done