mirror of
https://github.com/pragma-/pbot.git
synced 2024-11-30 07:59:42 +01:00
79 lines
1.6 KiB
Perl
Executable File
79 lines
1.6 KiB
Perl
Executable File
#!/usr/bin/perl
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
use Parse::RecDescent;
|
|
use Getopt::Std;
|
|
use Data::Dumper;
|
|
|
|
# todo: 1. the entire syntax for pointers to functions.
|
|
# 2. preprocessor directives. (getting there)
|
|
# So, the problem with handling CPP directives is when they
|
|
# interrupt something. I'm open to ideas.
|
|
# 4. functions to handle the nesting levels (ordinal number generator and CPP stack)
|
|
# 6. change returns to prints where appropriate.
|
|
|
|
our ($opt_T, $opt_t, $opt_o, $opt_P);
|
|
getopts('TPto:');
|
|
|
|
if ($opt_T ) {
|
|
$::RD_TRACE = 1;
|
|
} else {
|
|
undef $::RD_TRACE ;
|
|
}
|
|
|
|
$::RD_HINT = 1;
|
|
$Parse::RecDescent::skip = '\s*';
|
|
|
|
# This may be necessary..
|
|
# $::RD_AUTOACTION = q { [@item] };
|
|
|
|
my $parser;
|
|
|
|
if($opt_P or !eval { require PCGrammar }) {
|
|
precompile_grammar();
|
|
require PCGrammar;
|
|
}
|
|
|
|
$parser = PCGrammar->new() or die "Bad grammar!\n";
|
|
|
|
if ($opt_o) {
|
|
open(OUTFILE, ">>$opt_o");
|
|
*STDOUT = *OUTFILE{IO};
|
|
}
|
|
|
|
my $text = "";
|
|
foreach my $arg (@ARGV) {
|
|
print STDERR "Opening file $arg\n";
|
|
|
|
open(CFILE, "$arg") or die "Could not open $arg.\n";
|
|
local $/;
|
|
$text = <CFILE>;
|
|
close(CFILE);
|
|
|
|
print STDERR "parsing...\n";
|
|
|
|
# for debugging...
|
|
if ($opt_t) {
|
|
$::RD_TRACE = 1;
|
|
} else {
|
|
undef $::RD_TRACE;
|
|
}
|
|
|
|
defined $parser->startrule(\$text) or die "Bad text!\n$text\n";
|
|
}
|
|
|
|
$text =~ s/\s+//g;
|
|
print "\n[$text]\n" if length $text;
|
|
|
|
sub precompile_grammar {
|
|
print STDERR "Precompiling grammar...\n";
|
|
open GRAMMAR, 'CGrammar.pm' or die "Could not open CGrammar.pm: $!";
|
|
local $/;
|
|
my $grammar = <GRAMMAR>;
|
|
close GRAMMAR;
|
|
|
|
Parse::RecDescent->Precompile($grammar, "PCGrammar") or die "Could not precompile: $!";
|
|
}
|