2002-03-09 23:29:33 +00:00
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#
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# Copyright 1999, 2000, 2001 Patrik Stridvall
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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1999-10-24 21:45:39 +00:00
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package preprocessor;
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use strict;
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2004-10-07 18:53:56 +00:00
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sub new($) {
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1999-10-24 21:45:39 +00:00
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my $proto = shift;
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my $class = ref($proto) || $proto;
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my $self = {};
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bless ($self, $class);
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my $state = \%{$self->{STATE}};
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my $stack = \@{$self->{STACK}};
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my $include_found = \${$self->{INCLUDE_FOUND}};
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my $conditional_found = \${$self->{CONDITIONAL_FOUND}};
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2002-06-01 02:55:48 +00:00
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1999-10-24 21:45:39 +00:00
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$$include_found = shift;
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$$conditional_found = shift;
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return $self;
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}
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2004-10-07 18:53:56 +00:00
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sub include($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $include_found = \${$self->{INCLUDE_FOUND}};
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my $argument = shift;
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&$$include_found($argument);
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}
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2004-10-07 18:53:56 +00:00
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sub define($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $conditional_found = \${$self->{CONDITIONAL_FOUND}};
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my $name = shift;
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$$state{$name} = "def";
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&$$conditional_found($name);
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}
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2004-10-07 18:53:56 +00:00
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sub undefine($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $conditional_found = \${$self->{CONDITIONAL_FOUND}};
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my $name = shift;
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$$state{$name} = "undef";
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&$$conditional_found($name);
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}
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2004-10-07 18:53:56 +00:00
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sub begin_if($$$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $stack = \@{$self->{STACK}};
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my $directive = shift;
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local $_ = shift;
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while(!/^$/) {
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2003-08-08 21:04:17 +00:00
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if(/^0\s*\&\&/s) {
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1999-10-24 21:45:39 +00:00
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$_ = "0";
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2003-08-08 21:04:17 +00:00
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} elsif(/^1\s*\|\|/s) {
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1999-10-24 21:45:39 +00:00
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$_ = "1";
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}
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2003-08-08 21:04:17 +00:00
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if (/^(!\s*)?defined\s*\(\s*(\w+)\s*\)\s*(?:(\&\&|\|\|)\s*)?/s ||
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/^(!\s*)?defined\s*(\w+)\s*(?:(\&\&|\|\|)\s*)?/s)
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{
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1999-10-24 21:45:39 +00:00
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$_ = $';
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2003-08-08 21:04:17 +00:00
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my $sign = $1;
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my $var = $2;
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if (defined($sign) && $sign eq "!") {
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$self->undefine($var);
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push @$stack, $var;
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1999-10-24 21:45:39 +00:00
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} else {
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2003-08-08 21:04:17 +00:00
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$self->define($var);
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push @$stack, $var;
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1999-10-24 21:45:39 +00:00
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}
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2003-08-08 21:04:17 +00:00
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} elsif (/^(!\s*)?(\w+)\s*(?:(<|<=|==|!=|>=|>|\+|\-|\*\/)\s*(\w+)\s*)?(?:(\&\&|\|\|)\s*)?/s) {
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1999-10-24 21:45:39 +00:00
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$_ = $';
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2003-08-08 21:04:17 +00:00
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my $sign = $1;
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my $var = $2;
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if (defined($sign) && $sign eq "!") {
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$self->undefine($var);
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push @$stack, $var;
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} else {
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$self->define($var);
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push @$stack, $var;
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}
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} elsif(/^(!\s*)?\(/s) {
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$_ = "";
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1999-10-24 21:45:39 +00:00
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} else {
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print "*** Can't parse '#$directive $_' ***\n";
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$_ = "";
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}
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}
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}
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2004-10-07 18:53:56 +00:00
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sub else_if($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $stack = \@{$self->{STACK}};
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my $argument = shift;
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$self->end_if;
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if(defined($argument)) {
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$self->begin_if("elif", $argument);
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}
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}
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2004-10-07 18:53:56 +00:00
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sub end_if($) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $stack = \@{$self->{STACK}};
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my $macro = pop @$stack;
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delete $$state{$macro} if defined($macro);
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}
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2004-10-07 18:53:56 +00:00
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sub directive($$$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $stack = \@{$self->{STACK}};
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my $directive = shift;
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my $argument = shift;
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local $_ = $directive;
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if(/^if$/) {
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$self->begin_if("if",$argument);
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} elsif(/^ifdef$/) {
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$self->begin_if("if", "defined($argument)");
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} elsif(/^ifndef$/) {
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$self->begin_if("if", "!defined($argument)");
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push @$stack, $argument;
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} elsif(/^elif$/) {
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$self->else_if($argument);
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} elsif(/^else$/) {
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$self->else_if;
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} elsif(/^endif$/) {
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$self->end_if;
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} elsif(/^include/) {
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$self->include($argument);
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}
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}
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2004-10-07 18:53:56 +00:00
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sub is_def($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $name = shift;
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2002-06-01 02:55:48 +00:00
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1999-10-24 21:45:39 +00:00
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my $status = $$state{$name};
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return defined($status) && $status eq "def";
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}
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2004-10-07 18:53:56 +00:00
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sub is_undef($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $name = shift;
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2002-06-01 02:55:48 +00:00
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1999-10-24 21:45:39 +00:00
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my $status = $$state{$name};
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return defined($status) && $status eq "undef";
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}
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2004-10-07 18:53:56 +00:00
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sub is_unknown($$) {
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1999-10-24 21:45:39 +00:00
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my $self = shift;
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my $state = \%{$self->{STATE}};
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my $name = shift;
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2002-06-01 02:55:48 +00:00
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1999-10-24 21:45:39 +00:00
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my $status = $$state{$name};
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return !defined($status);
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}
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1;
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