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#!/bin/sh

PauseOnFail=
if [ "$1" = "--pause-on-fail" ]
then
	PauseOnFail=1
	shift
fi

NoColor=
if [ "$1" = "--no-color" ]
then
	NoColor=1
	shift
fi

if [ -z "$1" ]
then
	>&2 printf 'Usage: single_tester.sh <source>\n'
	return 1
fi

ThisDir="$(dirname "$(readlink -f "$0")")"

for File in $@
do
	SourceFile="$(readlink -f "$File")"
	[ "$SourceFile" ] || exit 1
	SourceFile="${SourceFile%.asm}.asm"
	[ -r "$SourceFile" ] || exit 1
	>&2 printf 'File: %s\n' "$File"

	(
		cd "$ThisDir"

		Stripped="${SourceFile%.asm}"
		OutName="../build/$(basename "$Stripped")"

		grep -v '^$\|^;\|^bits' "$SourceFile" |
		while read -r line
		do
			first="${OutName}_first"
			second="${OutName}_second"
			error="${OutName}_error"

			printf 'bits 16\n%s\n' "$line" > "$first".asm

			nasm -o "$first" "$first".asm 2> "$error"
			../build/sim8086 "$first" > "$second".asm  2> "$error"
			nasm -o "$second" "$second".asm 2>> "$error"

			if diff -q "$first" "$second" > /dev/null 2>> "$error"
			then
				if [ "$NoColor" ]
				then
					printf ' PASSED: '\''%s'\''\n' "$line"
				else
					printf '\033[32m PASSED: '\''%s'\''\033[0m\n' "$line"
				fi
			else
				if [ "$NoColor" ]
				then
					printf ' FAILED: '\''%s'\''\n' "$SourceFile"
				else
					printf '\033[31m FAILED: '\''%s'\''\033[0m\n' "$SourceFile"
				fi
				cat "$error" | sed 's/.*/    &/'
				printf '    listing>    %s\n' "$line"
			        printf '    sim8086>    %s\n' "$(grep -v '^$\|^;\|bits' "$second".asm)"

			        if [ "$PauseOnFail" ]
			        then
			        	exit
			        fi

			fi
			rm -f "$error" "$second" "$second".asm "$first" "$first".asm
		done
	)
done