From b74b7faed500074055836296929fb9efa3ad7498 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 9 Jun 2009 12:48:17 +0100
Subject: [PATCH] marketdata file decoder

---
 pctb/yppsc-decode-marketdata | 81 ++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100755 pctb/yppsc-decode-marketdata

diff --git a/pctb/yppsc-decode-marketdata b/pctb/yppsc-decode-marketdata
new file mode 100755
index 0000000..969ada0
--- /dev/null
+++ b/pctb/yppsc-decode-marketdata
@@ -0,0 +1,81 @@
+#!/usr/bin/perl
+
+use IO::Handle;
+
+open CM, "commodmap" or die $!;
+while (<CM>) {
+    m/^(\S.*\S)\t(\d+)$/ or die;
+    $commodmap[$2]= $1;
+}
+die $! if CM->error;
+
+%stallkinds= qw(A Apothecary
+		D Distilling
+		F Furnishing
+		I Ironworking
+		S Shipbuilding
+		T Tailor
+		W Weaving);
+
+sub getline() {
+    $!=0; my $l= <STDIN>; die $! unless defined $l;
+    die $! if STDIN->error;
+    die unless chomp $l;
+#print STDERR "GOT LINE [$l]\n";
+    return $l;
+}
+
+sub getint() {
+    my $b;
+    my $r= read STDIN,$b,2; die $! if STDIN->error;
+    die unless $r==2;
+    my $v= scalar unpack "v", $b;
+#printf STDERR "GOT INT %d 0x%x\n", $v, $v;
+    return $v;
+}
+
+sub inmap($\@$) {
+    my ($what,$ary,$ix) = @_;
+    my $got= $ary->[$ix];
+    return $got if defined $got;
+    die "$what $ix ?";
+}
+    
+
+printf "# Version: \"%s\"\n", getline();
+$nstalls= getline()+0;
+
+while (@stalls < $nstalls) {
+    $_= getline();
+    if (s/\^[A-Z]$//) {
+	$kind= $1;
+	$sk= $stallkinds{$kind};
+	die "kind $kind in $_ ?" unless defined $sk;
+	$_ .= "'s $sk Stall";
+    }
+    push @stalls, $_;
+}
+unshift @stalls, undef;
+
+$|=1;
+
+foreach $bs qw(Buy Sell) {
+    $ncommods= getint();
+    for ($commodnum=0; $commodnum<$ncommods; $commodnum++) {
+	$commodix= getint();
+	$offers= getint();
+	for ($offernum=0; $offernum<$offers; $offernum++) {
+	    $stallix= getint();
+	    $price= getint();
+	    $qty= getint();
+	    printf("%s\t%s\t%s",
+		   $bs,
+		   inmap('commod',@commodmap,$commodix),
+		   inmap('stall',@stalls,$stallix)) or die $!;
+	    if ($bs eq 'Sell') { print "\t\t" or die $!; }
+	    printf("\t%d\t%d", $price, $qty) or die $!;
+	    if ($bs eq 'Buy') { print "\t\t" or die $!; }
+	    print "\n" or die $!;
+	}
+    }
+}
-- 
2.30.2