| 1 | #! /usr/bin/perl |
| 2 | |
| 3 | use autodie; |
| 4 | |
| 5 | sub intify ($) { |
| 6 | my ($n) = @_; |
| 7 | if ($n =~ /^0/) { $n = oct $n; } |
| 8 | return $n; |
| 9 | } |
| 10 | |
| 11 | my $MEM = ""; |
| 12 | my $BASE = 0x4009; |
| 13 | my $LIMIT = 0x8000; |
| 14 | |
| 15 | for my $a (@ARGV) { |
| 16 | $a =~ /^(\w+):(.*)$/ or die "bad spec ADDR:FILE"; |
| 17 | my $addr = intify $1; |
| 18 | my $file = $2; |
| 19 | |
| 20 | my $body = ""; |
| 21 | open my $fh, "<", $file; |
| 22 | READ: for (;;) { |
| 23 | sysread $fh, my $buf, 4096; |
| 24 | last READ unless length $buf; |
| 25 | $body .= $buf; |
| 26 | } |
| 27 | close $fh; |
| 28 | |
| 29 | $addr >= $BASE && $LIMIT >= $addr + length $body |
| 30 | or die "out of bounds"; |
| 31 | |
| 32 | $addr -= $BASE; |
| 33 | my $end = $addr + length $body; |
| 34 | my $before = $addr > length $MEM |
| 35 | ? $MEM . "\0" x ($addr - length $MEM) |
| 36 | : substr $MEM, 0, $addr; |
| 37 | my $after = $end <= length $MEM |
| 38 | ? "" |
| 39 | : substr $MEM, $end; |
| 40 | $MEM = $before . $body . $after; |
| 41 | } |
| 42 | |
| 43 | syswrite STDOUT, $MEM; |