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#!/usr/bin/perl -w
use strict;
# read embed.fnc and regen/opcodes, needed by regen/embed.pl and makedef.pl
require 5.004; # keep this compatible, an old perl is all we may have before
# we build the new one
# Records the current pre-processor state:
my @state;
# Nested structure to group functions by the pre-processor conditions that
# control when they are compiled:
my %groups;
sub current_group {
my $group = \%groups;
# Nested #if blocks are effectively &&ed together
# For embed.fnc, ordering within the && isn't relevant, so we can
# sort them to try to group more functions together.
foreach (sort @state) {
$group->{$_} ||= {};
$group = $group->{$_};
}
return $group->{''} ||= [];
}
sub add_level {
my ($level, $indent, $wanted) = @_;
my $funcs = $level->{''};
my @entries;
if ($funcs) {
if (!defined $wanted) {
@entries = @$funcs;
} else {
foreach (@$funcs) {
if ($_->[0] =~ /A/) {
push @entries, $_ if $wanted eq 'A';
} elsif ($_->[0] =~ /E/) {
push @entries, $_ if $wanted eq 'E';
} else {
push @entries, $_ if $wanted eq '';
}
}
}
@entries = sort {$a->[2] cmp $b->[2]} @entries;
}
foreach (sort grep {length $_} keys %$level) {
my @conditional = add_level($level->{$_}, $indent . ' ', $wanted);
push @entries,
["#${indent}if $_"], @conditional, ["#${indent}endif"]
if @conditional;
}
return @entries;
}
sub setup_embed {
my $prefix = shift || '';
open IN, $prefix . 'embed.fnc' or die $!;
my @embed;
my %seen;
my $macro_depth = 0;
while (<IN>) {
chomp;
next if /^:/;
next if /^$/;
while (s|\\$||) {
$_ .= <IN>;
chomp;
}
s/\s+$//;
my @args;
if (/^\s*(#|$)/) {
@args = $_;
}
else {
@args = split /\s*\|\s*/, $_;
}
if (@args == 1) {
if ($args[0] !~ /^#\s*(?:if|ifdef|ifndef|else|endif)/) {
die "Illegal line $. '$args[0]' in embed.fnc";
}
$macro_depth++ if $args[0] =~/^#\s*if(n?def)?\b/;
$macro_depth-- if $args[0] =~/^#\s*endif\b/;
die "More #endif than #if in embed.fnc:$." if $macro_depth < 0;
}
else {
die "Illegal line (less than 3 fields) in embed.fnc:$.: $_"
unless @args >= 3;
my $name = $args[2];
# only check for duplicates outside of #if's - otherwise
# they may be alternate definitions of the same function
if ($macro_depth == 0) {
die "Duplicate function name: '$name' in embed.fnc:$."
if exists $seen{$name};
}
$seen{$name} = 1;
}
push @embed, \@args;
}
die "More #if than #endif by the end of embed.fnc" if $macro_depth != 0;
close IN or die "Problem reading embed.fnc: $!";
open IN, $prefix . 'regen/opcodes' or die $!;
{
my %syms;
while (<IN>) {
chomp;
next unless $_;
next if /^#/;
my $check = (split /\t+/, $_)[2];
next if $syms{$check}++;
# These are all indirectly referenced by globals.c.
push @embed, ['pR', 'OP *', $check, 'NN OP *o'];
}
}
close IN or die "Problem reading regen/opcodes: $!";
# Cluster entries in embed.fnc that have the same #ifdef guards.
# Also, split out at the top level the three classes of functions.
# Output structure is actually the same as input structure - an
# (ordered) list of array references, where the elements in the
# reference determine what it is - a reference to a 1-element array is a
# pre-processor directive, a reference to 2+ element array is a function.
my $current = current_group();
foreach (@embed) {
if (@$_ > 1) {
push @$current, $_;
next;
}
$_->[0] =~ s/^#\s+/#/;
$_->[0] =~ /^\S*/;
$_->[0] =~ s/^#ifdef\s+(\S+)/#if defined($1)/;
$_->[0] =~ s/^#ifndef\s+(\S+)/#if !defined($1)/;
if ($_->[0] =~ /^#if\s*(.*)/) {
push @state, $1;
} elsif ($_->[0] =~ /^#else\s*$/) {
die "Unmatched #else in embed.fnc" unless @state;
$state[-1] = "!($state[-1])";
} elsif ($_->[0] =~ m!^#endif\s*(?:/\*.*\*/)?$!) {
die "Unmatched #endif in embed.fnc" unless @state;
pop @state;
} else {
die "Unhandled pre-processor directive '$_->[0]' in embed.fnc";
}
$current = current_group();
}
return ([add_level(\%groups, '')],
[add_level(\%groups, '', '')], # core
[add_level(\%groups, '', 'E')], # ext
[add_level(\%groups, '', 'A')]); # api
}
1;
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