mirror of
git://projects.qi-hardware.com/eda-tools.git
synced 2024-11-05 16:06:15 +02:00
134 lines
3.2 KiB
Perl
Executable File
134 lines
3.2 KiB
Perl
Executable File
#!/usr/bin/perl
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require "parser.pl";
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require "misc.pl";
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$mult = shift(@ARGV);
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&parse;
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sub number
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{
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local ($id) = @_;
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my $s = $inv{$id}[0];
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my $n = $want{$id}*$mult;
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return $n < $s ? $n : $s;
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}
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#
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# The heuristics here aren't very nice. We give zero-cost stock priority over
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# any other stock, when we go by stock size up to the quantity we need. The
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# idea is to exhause local stock (zero-cost) first, then try to obtain the
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# parts with as few orders as possible.
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#
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# It would be better to have some sort of priority, so that we can express a
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# preference among stock we already own. Also, if non-zero-cost stock has widly
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# different prices, the smallest order cost may not be a good indicator of
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# which source we prefer.
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#
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# Furthermore, the algorithm doesn't consider the number of sources we use in
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# total or things like lead time, shipping cost, customs, etc.
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#
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sub rank
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{
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local ($a, $b) = @_;
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my $na = &number($a); # min(number wanted, available)
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my $nb = &number($b);
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my $pa = $inv{$a}[3]; # per unit price for smallest quantum
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my $pb = $inv{$b}[3];
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#print STDERR "a=$a b=$b na=$na nb=$nb pa=$pa pb=$pb\n";
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return 1 if $na && !$pa && $pb;
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return -1 if $nb && $pa && !$pb;
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return $na <=> $nb if $na != $nb;
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return $pb <=> $pa;
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}
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for (keys %parts) {
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$parts++;
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}
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print "#ORD\n";
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for (sort { &rank($b, $a) } keys %want) {
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my $n = &number($_);
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$n -= $n % $mult;
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next unless $n;
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my @f = @{ $inv{$_} };
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my $max = shift @f;
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my $currency = shift @f;
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my @qty;
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my @price;
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my %index;
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my $best_qty;
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my $best_price = undef;
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while (@f) {
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my $q = shift @f;
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my $p = shift @f;
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if (defined $index{$q}) {
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$price[$index{$q}] = $p;
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} else {
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push(@qty, $q);
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push(@price, $p);
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$index{$q} = $#qty;
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# @@@ this fails if smaller quantities following a large quantity
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# differ from the quantities preceding them. E.g., 1 10 100 25
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# wouldn't yield correct results.
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}
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for (my $i = $#qty; $i >= 0; $i--) {
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my $order = 0;
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my $price = 0;
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my $left = $n;
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for (my $j = $#qty; $j >= $i; $j--) {
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while ($left >= ($j == $i ? 1 : $qty[$j])) {
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$left -= $qty[$j];
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$order += $qty[$j];
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$price += $price[$j]*$qty[$j];
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}
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}
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next if $order > $max;
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if (!defined $best_price || $price < $best_price) {
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$best_price = $price;
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$best_qty = $order;
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}
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}
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}
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next if !defined $best_price;
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print "$_ $best_qty $currency $best_price";
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my $id = $_;
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while (keys %{ $comps{$id} }) {
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last if $best_qty < $mult;
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$best_qty -= $mult;
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my $ref = (sort { &cmp_cref($a, $b); } keys %{ $comps{$id} })[0];
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#print STDERR "$id: $ref + ", join("|", keys %{ $comps{$id} }), "\n";
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my @f = @{ $parts{$ref} };
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while (@f) {
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my @id2 = splice(@f, 0, 2);
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my $id2 = "$id2[0] $id2[1]";
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$want{$id2}--;
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delete $comps{$id2}{$ref};
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}
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print " $ref";
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}
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print "\n";
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}
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for my $id (sort { $want{$b} <=> $want{$a} } keys %want) {
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next unless $want{$id};
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print STDERR "$id";
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for (&eq($id)) {
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# next unless $want{$_};
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die "\n$_ ($want{$_}) vs. $id want ($want{$id})"
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unless $want{$_} == $want{$id};
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print STDERR " $_";
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$want{$_} = 0;
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}
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print STDERR ": want $want{$id}\n";
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$want{$id} = 0;
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}
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