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#!/usr/bin/perl
#
# mms2make.pl - convert Descrip.MMS file to Makefile
# Version 2.0 29-Sep-1994
# David Denholm <denholm@conmat.phys.soton.ac.uk>
#
# 1.0 06-Aug-1994 Charles Bailey bailey@genetics.upenn.edu
# - original version
# 2.0 29-Sep-1994 David Denholm <denholm@conmat.phys.soton.ac.uk>
# - take action based on MMS .if / .else / .endif
# any command line options after filenames are set in an assoc array %macros
# maintain "@condition as a stack of current conditions
# we unshift a 0 or 1 to front of @conditions at an .ifdef
# we invert top of stack at a .else
# we pop at a .endif
# we deselect any other line if $conditions[0] is 0
# I'm being very lazy - push a 1 at start, then dont need to check for
# an empty @conditions [assume nesting in descrip.mms is correct]
if ($#ARGV > -1 && $ARGV[0] =~ /^[\-\/]trim/i) {
$do_trim = 1;
shift @ARGV;
}
$infile = $#ARGV > -1 ? shift(@ARGV) : "Descrip.MMS";
$outfile = $#ARGV > -1 ? shift(@ARGV) : "Makefile.";
# set any other args in %macros - set VAXC by default
foreach (@ARGV) { $macros{"\U$_"}=1 }
# consistency check
$macros{"DECC"} = 1 if $macros{"__AXP__"};
# set conditions as if there was a .if 1 around whole file
# [lazy - saves having to check for empty array - just test [0]==1]
@conditions = (1);
open(INFIL,$infile) || die "Can't open $infile: $!\n";
open(OUTFIL,">$outfile") || die "Can't open $outfile: $!\n";
print OUTFIL "#> This file produced from $infile by $0\n";
print OUTFIL "#> Lines beginning with \"#>\" were commented out during the\n";
print OUTFIL "#> conversion process. For more information, see $0\n";
print OUTFIL "#>\n";
while (<INFIL>) {
s/$infile/$outfile/eoi;
if (/^\#/) {
if (!/^\#\:/) {print OUTFIL;}
next;
}
# look for ".ifdef macro" and push 1 or 0 to head of @conditions
# push 0 if we are in false branch of another if
if (/^\.ifdef\s*(.+)/i)
{
print OUTFIL "#> ",$_ unless $do_trim;
unshift @conditions, ($macros{"\U$1"} ? $conditions[0] : 0);
next;
}
# reverse $conditions[0] for .else provided surrounding if is active
if (/^\.else/i)
{
print OUTFIL "#> ",$_ unless $do_trim;
$conditions[0] = $conditions[1] && !$conditions[0];
next;
}
# pop top condition for .endif
if (/^\.endif/i)
{
print OUTFIL "#> ",$_ unless $do_trim;
shift @conditions;
next;
}
next if ($do_trim && !$conditions[0]);
# spot new rule and pick up first source file, since some versions of
# Make don't provide a macro for this
if (/[^#!]*:\s+/) {
if (/:\s+([^\s,]+)/) { $firstsrc = $1 }
else { $firstsrc = "\$<" }
}
s/^ +/\t/;
s/^\.first/\.first:/i;
s/^\.suffixes/\.suffixes:/i;
s/\@\[\.vms\]/\$\$\@\[\.vms\]/;
s/f\$/f\$\$/goi;
s/\$\(mms\$source\)/$firstsrc/i;
s/\$\(mms\$target\)/\$\@/i;
s/\$\(mms\$target_name\)\$\(O\)/\$\@/i;
s/\$\(mms\$target_name\)/\$\*/i;
s/sys\$([^\(])/sys\$\$$1/gi;
print OUTFIL "#> " unless $conditions[0];
print OUTFIL $_;
}
close INFIL;
close OUTFIL;
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