#! /usr/bin/env perl

# Convert cmupint.sty to a faked version that does not require
# the definition of any additional math alphabets
#
# By Scott Pakin <scott+clsl@pakin.org>

use warnings;
use strict;

# Read and process cmupint.sty.
my %raw_sym2slot;   # Map from a no-limits integral to a font slot
my %sym2slot;       # Map from an integral with limits to a font slot
my $provides;       # \ProvidesPackage line
while (my $line = <>) {
    chomp $line;
    if ($line =~ /^\\DeclareMathSymbol\{\\(\w+)\}.*\{(\d+)\}/) {
	$raw_sym2slot{$1} = $2 + 0;
    }
    elsif ($line =~ /^\\def\\(\w+)\{\\relax\\(\w+)/) {
	$sym2slot{$1} = $raw_sym2slot{$2};
    }
    elsif ($line =~ /^\\ProvidesPackage/) {
	$provides = $line;
    }
}

# Output some header boilerplate.
print "\%" x 43, "\n";
print "\% This is a generated file.  DO NOT EDIT. \%\n";
print "\%" x 43, "\n";
print "\n";
print $provides, "\n";
print <<'DEFCMD';
\newcommand*{\cmupintsym}[2]{%
  \raisebox{#1}{%
    \usefont{U}{cmupint}{m}{n}\selectfont
    \char#2%
  }%
}

DEFCMD
;

# Define each symbol as a text symbol.
foreach my $sym (sort {$sym2slot{$a} <=> $sym2slot{$b}} keys %sym2slot) {
    printf '\DeclareRobustCommand{\CMUP%sT}{\cmupintsym{8pt}{%d}}'."\n", $sym, $sym2slot{$sym};
    printf '\DeclareRobustCommand{\CMUP%sD}{\cmupintsym{13pt}{%d}}'."\n", $sym, $sym2slot{$sym} + 1;
}

# \idotsint needs to be constructed manually.
print <<'IDOTSINT';
\DeclareRobustCommand{\CMUPidotsintT}{\CMUPintT$\,\intdots@$\CMUPintT}
\DeclareRobustCommand{\CMUPidotsintD}{\CMUPintD$\,\intdots@$\CMUPintD}
IDOTSINT
;

# Output some header boilerplate.
print "\n";
print "\\endinput\n";