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Utility to format 6502 assembler source files for as65
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Leeland Heins 2018-12-19 23:09:16 -06:00 committed by GitHub
parent 1588103efb
commit 1152bcd84d
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#!/usr/bin/perl -w
#
# asfmt.pl
#
# Simple 65C02 assembler source formatter.
#
# 20181219 LSH
#
use strict;
sub usage {
print "Usage:\n";
print "$0 [-h] <input_file>\n";
print " -h : This help\n";
}
# Process command line arguments.
while (defined $ARGV[0] && $ARGV[0] =~ /^-/) {
# Help.
if ($ARGV[0] eq '-h') {
usage();
exit;
} else {
die "Invalid argument $ARGV[0]\n";
}
}
my $input_file = shift;
die "Must supply input filename\n" unless defined $input_file && $input_file;
sub parse_line {
my ($line, $lineno) = @_;
my ($label, $mnemonic, $operand, $comment) = ('', '', '', '');
if ($line =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(;.*)$/) {
$label = $1;
$mnemonic = $2;
$operand = $3;
$comment = $4;
} elsif ($line =~ /^(\S+)\s+(\S+)\s+(\S+)\s*$/) {
$label = $1;
$mnemonic = $2;
$operand = $3;
$comment = '';
} elsif ($line =~ /^\s+(\S+)\s+(\S+)\s+(;.*)$/) {
$label = '';
$mnemonic = $1;
$operand = $2;
$comment = $3;
} elsif ($line =~ /^\s+(\S+)\s+(\S+)\s*$/) {
$label = '';
$mnemonic = $1;
$operand = $2;
$comment = '';
} elsif ($line =~ /^\s+(\S+)\s+(;.*)$/) {
$label = '';
$mnemonic = $1;
$operand = '';
$comment = $2;
} elsif ($line =~ /^\s+(\S+)\s*$/) {
$label = '';
$mnemonic = $1;
$operand = '';
$comment = '';
} elsif ($line =~ /^(\S+)\s*$/) {
$label = $1;
$mnemonic = '';
$operand = '';
$comment = '';
} elsif ($line =~ /^(\S+)\s+(\S+)\s*$/) {
$label = $1;
$mnemonic = $2;
$operand = '';
$comment = '';
} elsif ($line =~ /^\s+(\S+)\s+(;.*)$/) {
$label = '';
$mnemonic = $1;
$operand = '';
$comment = $2;
} elsif ($line =~ /^(\S+)\s+(\S+)\s+(;.*)$/) {
$label = $1;
$mnemonic = $2;
$operand = '';
$comment = $3;
} elsif ($line =~ /^(\S+)\s+([Aa][Ss][Cc])\s+(".+")\s+(;.*)$/) {
$label = $1;
$mnemonic = $2;
$operand = $3;
$comment = $4;
} elsif ($line =~ /^\s+([Aa][Ss][Cc])\s+(".+")\s+(;.*)$/) {
$label = '';
$mnemonic = $1;
$operand = $2;
$comment = $3;
} elsif ($line =~ /^(\S+)\s+([Aa][Ss][Cc])\s+(".+")\s*$/) {
$label = $1;
$mnemonic = $2;
$operand = $3;
$comment = '';
} elsif ($line =~ /^\s+([Aa][Ss][Cc])\s+(".+")\s*$/) {
$label = '';
$mnemonic = $1;
$operand = $2;
$comment = '';
} else {
print "SYNTAX ERROR! $lineno : $line\n";
}
$label = '' unless defined $label;
$comment = '' unless defined $comment;
$mnemonic = '' unless defined $mnemonic;
$operand = '' unless defined $operand;
return ($label, $mnemonic, $operand, $comment);
}
my $ifh;
# Open the input file.
if (open($ifh, "<$input_file")) {
my $lineno = 0;
while (my $line = readline $ifh) {
chomp $line;
$lineno++;
if ($line =~ /^\s*\*|^\s*;/) {
print "$line\n";
next;
}
# Parse input lines.
my ($label, $mnemonic, $operand, $comment) = parse_line($line, $lineno);
print sprintf("%-8s %-4s %-12s %s\n", $label, $mnemonic, $operand, $comment);
}
close $ifh;
} else {
die "Can't open $input_file\n";
}
1;