#!/usr/bin/perl -w
-use strict qw (vars);
+use strict qw(vars);
use IO::Handle;
use POSIX;
-our ($ship, %have, %price);
-
my $usage = <<END
usage:
- .../ypp-restock-rum [<prices>] [<ship> <stocks>]
-where
- <prices> is three arguments: the prices for swill, grog and fine rum
- <ship> is a ship name or an amount of fine rum
- <stocks> are amounts on board for swill, grog and fine rum
+ .../ypp-restock-rum [<information> ...]
+
+where <information> is
+
+ have [<swill> <grog>] <fine> [<hold_shot>+<loaded_shot>]
+ want [<swill> <grog>] <fine> [<shot>]
+ price <swill> <grog> <fine> [<shot>]
+
+Each of which may appear only once, except \`have' which may appear
+more than once which case we calculate the differences and the profit
+for each one.
+
+If /<shot> is not specified at all, relevant information about shot is
+not reported. For have and want, specifying an empty string means
+zero. Entirely Missing <swill>/<grog>/ is taken as if both were
+specified and zero.
+
+In price, missing entries mean the commodity is unavailable.
END
;
-sub main () {
- if (@ARGV==4) {
- ($ship, $have{Swill}, $have{Grog}, $have{Fine}) = @ARGV;
- print_inputs();
- compute_restock_requirements();
- } elsif (@ARGV==3) {
- ($price{Swill}, $price{Grog}, $price{Fine}) = @ARGV;
- print_inputs();
- compute_cheapest_rum();
- } elsif (@ARGV==7) {
- ($price{Swill}, $price{Grog}, $price{Fine},
- $ship,
- $have{Swill}, $have{Grog}, $have{Fine}) = @ARGV;
- print_inputs();
- compute_cheapest_rum();
- compute_restock_requirements();
- compute_restock_cheapest_rum();
+our (@vals) = qw(swill grog fine shot);
+our (@proofs) = qw(40 60 100);
+
+sub parse_info ($$$\@$) {
+ my ($omitswgok,$default,$multishot, $storeary, $what) = @_;
+ @ARGV or badusage("missing value for information argument \`$_'");
+ badusage("$what: specified more than once")
+ if defined $storeary->[2];
+ my (@v) = ();
+ while (@ARGV and $ARGV[0] =~ m/^\d/) {
+ $_ = shift @ARGV;
+ push @v, $_;
+ }
+ if (@v==1 or @v==2) {
+ badusage("$what: swill and grog amounts must be specified")
+ unless $omitswgok;
+ @v=($default,$default,@v);
+ }
+ if ($multishot and @v==4 and length $v[3]) {
+ $v[3] =~ m/^0*(\d+)\+0*(\d+)$/ or
+ badusage("$what: shot must be specified as <hold>+<loaded>");
+ $v[3] = $1 + $2;
+ }
+ if (@v==3) {
+ push @v, $default;
+ }
+ if (@v != 4) {
+ badusage("$what: invalid syntax (wrong number of /s)");
+ }
+ my $i=0;
+ foreach $_ (@v) {
+ $_ = $default if !length;
+ m/^0*(\d+)$/ or badusage("$what: $vals[$i] \`$_': bad syntax");
+ $_= $1;
+ $i++;
+ }
+ @$storeary = @v;
+}
+
+our (@haves,@want,@price);
+
+sub parse_args () {
+ @ARGV or badusage("need some information to go on");
+ while (@ARGV) {
+ $_ = shift @ARGV;
+ if (m/^have$/) {
+ parse_info(1,0,1, @{ $haves[@haves] }, 'BUG');
+ } elsif (m/^want$/) {
+ parse_info(1,0,0, @want, 'want');
+ } elsif (m/^price$/) {
+ parse_info(0,1e6,0, @price, 'price');
+ } else {
+ badusage("unknown information argument \`$_'");
+ }
+ }
+}
+
+sub badusage ($) {
+ my ($m) = @_;
+ print STDERR "bad usage: $m\n\n$usage\n";
+ exit 16;
+}
+
+parse_args();
+use Data::Dumper;
+print Dumper({ Have => \@haves, Want => \@want, Price => \@price });
+
+our @norm_price;
+our $best;
+
+sub compute_cheapest_rum() {
+ return unless @price;
+
+ $best= undef;
+ my $best_norm_price= 1e5;
+ for my $i (qw(0 1 2)) {
+ next unless $price[$i];
+ $norm_price[$i] = $price[$i] * $proof[$i] / $proof[$i];
+ if ($norm_price[$i] <= $best_norm_price) {
+ $best= $i;
+ }
+ };
+ prf('normalised prices', @norm_price, 'poe/fine');
+ if (defined $best) {
+ printf "best is %s\n\n", $best;
} else {
- die $usage;
+ die "no rum available ?\n";
}
}
-our @rums= qw(Swill Grog Fine);
-our %proof= qw(Swill 40
- Grog 60
- Fine 100);
+
+
+__DATA__
our $ff = '%6.1f';
printf "%-20s %s\n", "$k:", $v;
}
-our ($best_kind);
-
-sub compute_cheapest_rum() {
- $best_kind= undef;
- my %norm_price;
- my $best_norm_price= 1e6;
- foreach $_ (@rums) {
- next unless defined $price{$_};
- $norm_price{$_} = $price{$_} * $proof{Fine} / $proof{$_};
- if ($norm_price{$_} <= $best_norm_price) {
- $best_kind= $_;
- $best_norm_price= $norm_price{$_};
- }
- };
- prf('normalised prices', %norm_price, 'poe/fine');
- if (defined $best_kind) {
- printf "best is %s\n\n", $best_kind;
- } else {
- die "no rum available ?\n";
- }
-}
+our ($best);
our $have_proof;
if ($need_proof < 0) {
printf "stocks are sufficient";
} else {
- my $buy= ceil($buy{$best_kind});
+ my $buy= ceil($buy{$best});
printf "buy %d %s at %d poe each for %d poe",
- $buy, $best_kind, $price{$best_kind}, $buy * $price{$best_kind};
+ $buy, $best, $price{$best}, $buy * $price{$best};
}
print "\n\n";
}