=head1 SYNOPSIS
-B<xsubpp> [B<-v>] [B<-C++>] [B<-except>] [B<-s pattern>] [B<-prototypes>] [B<-noversioncheck>] [B<-nolinenumbers>] [B<-typemap typemap>] ... file.xs
+B<xsubpp> [B<-v>] [B<-C++>] [B<-except>] [B<-s pattern>] [B<-prototypes>] [B<-noversioncheck>] [B<-nolinenumbers>] [B<-nooptimize>] [B<-typemap typemap>] ... file.xs
=head1 DESCRIPTION
+This compiler is typically run by the makefiles created by L<ExtUtils::MakeMaker>.
+
I<xsubpp> will compile XS code into C code by embedding the constructs
necessary to let C functions manipulate Perl values and creates the glue
necessary to let Perl access those functions. The compiler uses typemaps to
=head1 OPTIONS
+Note that the C<XSOPT> MakeMaker option may be used to add these options to
+any makefiles generated by MakeMaker.
+
=over 5
=item B<-C++>
Adds ``extern "C"'' to the C code.
-
=item B<-except>
Adds exception handling stubs to the C code.
Prevents the inclusion of `#line' directives in the output.
+=item B<-nooptimize>
+
+Disables certain optimizations. The only optimization that is currently
+affected is the use of I<target>s by the output C code (see L<perlguts>).
+This may significantly slow down the generated code, but this is the way
+B<xsubpp> of 5.005 and earlier operated.
+
=back
=head1 ENVIRONMENT
$FH = 'File0000' ;
-$usage = "Usage: xsubpp [-v] [-C++] [-except] [-prototypes] [-noversioncheck] [-nolinenumbers] [-s pattern] [-typemap typemap]... file.xs\n";
+$usage = "Usage: xsubpp [-v] [-C++] [-except] [-prototypes] [-noversioncheck] [-nolinenumbers] [-nooptimize] [-s pattern] [-typemap typemap]... file.xs\n";
$proto_re = "[" . quotemeta('\$%&*@;') . "]" ;
# mjn
$WantVersionChk = 1 ;
$ProtoUsed = 0 ;
$WantLineNumbers = 1 ;
+$WantOptimize = 1 ;
SWITCH: while (@ARGV and $ARGV[0] =~ /^-./) {
$flag = shift @ARGV;
$flag =~ s/^-// ;
push(@tm,shift), next SWITCH if $flag eq 'typemap';
$WantLineNumbers = 0, next SWITCH if $flag eq 'nolinenumbers';
$WantLineNumbers = 1, next SWITCH if $flag eq 'linenumbers';
- (print "xsubpp version $XSUBPP_version\n"), exit
+ $WantOptimize = 0, next SWITCH if $flag eq 'nooptimize';
+ $WantOptimize = 1, next SWITCH if $flag eq 'optimize';
+ (print "xsubpp version $XSUBPP_version\n"), exit
if $flag eq 'v';
die $usage;
}
$input_expr{$key} =~ s/\n+$//;
}
+$bal = qr[(?:(?>[^()]+)|\((?p{ $bal })\))*]; # ()-balanced
+$cast = qr[(?:\(\s*SV\s*\*\s*\)\s*)?]; # Optional (SV*) cast
+$size = qr[,\s* (?p{ $bal }) ]x; # Third arg (to setpvn)
+
+foreach $key (keys %output_expr) {
+ use re 'eval';
+
+ my ($t, $with_size, $arg, $sarg) =
+ ($output_expr{$key} =~
+ m[^ \s+ sv_set ( [iunp] ) v (n)? # Type, is_setpvn
+ \s* \( \s* $cast \$arg \s* ,
+ \s* ( (?p{ $bal }) ) # Set from
+ ( (?p{ $size }) )? # Possible sizeof set-from
+ \) \s* ; \s* $
+ ]x);
+ $targetable{$key} = [$t, $with_size, $arg, $sarg] if $t;
+}
+
$END = "!End!\n\n"; # "impossible" keyword (multiple newline)
# Match an XS keyword
$thisdone |= $var_name eq "THIS";
$retvaldone |= $var_name eq "RETVAL";
$var_types{$var_name} = $var_type;
- print "\t" . &map_type($var_type);
+ # XXXX This check is a safeguard against the unfinished conversion of
+ # generate_init(). When generate_init() is fixed,
+ # one can use 2-args map_type() unconditionally.
+ if ($var_type =~ / \( \s* \* \s* \) /x) {
+ # Function pointers are not yet supported with &output_init!
+ print "\t" . &map_type($var_type, $var_name);
+ $name_printed = 1;
+ } else {
+ print "\t" . &map_type($var_type);
+ $name_printed = 0;
+ }
$var_num = $args_match{$var_name};
$proto_arg[$var_num] = ProtoString($var_type)
$func_args =~ s/\b($var_name)\b/&$1/;
}
if ($var_init =~ /^[=;]\s*NO_INIT\s*;?\s*$/) {
+ if ($name_printed) {
+ print ";\n";
+ } else {
print "\t$var_name;\n";
+ }
} elsif ($var_init =~ /\S/) {
- &output_init($var_type, $var_num, $var_name, $var_init);
+ &output_init($var_type, $var_num, $var_name, $var_init, $name_printed);
} elsif ($var_num) {
# generate initialization code
- &generate_init($var_type, $var_num, $var_name);
+ &generate_init($var_type, $var_num, $var_name, $name_printed);
} else {
print ";\n";
}
$_ = '' ;
} else {
if ($ret_type ne "void") {
- print "\t" . &map_type($ret_type) . "\tRETVAL;\n"
+ print "\t" . &map_type($ret_type, 'RETVAL') . ";\n"
if !$retvaldone;
$args_match{"RETVAL"} = 0;
$var_types{"RETVAL"} = $ret_type;
+ print "\tdXSTARG;\n"
+ if $WantOptimize and $targetable{$type_kind{$ret_type}};
}
print $deferred;
if ($gotRETVAL && $RETVAL_code) {
print "\t$RETVAL_code\n";
} elsif ($gotRETVAL || $wantRETVAL) {
- # RETVAL almost never needs SvSETMAGIC()
- &generate_output($ret_type, 0, 'RETVAL', 0);
+ my $t = $WantOptimize && $targetable{$type_kind{$ret_type}};
+ my $var = 'RETVAL';
+ my $type = $ret_type;
+
+ # 0: type, 1: with_size, 2: how, 3: how_size
+ if ($t and not $t->[1] and $t->[0] eq 'p') {
+ # PUSHp corresponds to setpvn. Treate setpv directly
+ my $what = eval qq("$t->[2]");
+ warn $@ if $@;
+
+ print "\tsv_setpv(TARG, $what); XSprePUSH; PUSHTARG;\n";
+ }
+ elsif ($t) {
+ my $what = eval qq("$t->[2]");
+ warn $@ if $@;
+
+ my $size = $t->[3];
+ $size = '' unless defined $size;
+ $size = eval qq("$size");
+ warn $@ if $@;
+ print "\tXSprePUSH; PUSH$t->[0]($what$size);\n";
+ }
+ else {
+ # RETVAL almost never needs SvSETMAGIC()
+ &generate_output($ret_type, 0, 'RETVAL', 0);
+ }
}
# do cleanup
&Exit;
sub output_init {
- local($type, $num, $var, $init) = @_;
+ local($type, $num, $var, $init, $name_printed) = @_;
local($arg) = "ST(" . ($num - 1) . ")";
if( $init =~ /^=/ ) {
- eval qq/print "\\t$var $init\\n"/;
+ if ($name_printed) {
+ eval qq/print " $init\\n"/;
+ } else {
+ eval qq/print "\\t$var $init\\n"/;
+ }
warn $@ if $@;
} else {
if( $init =~ s/^\+// && $num ) {
- &generate_init($type, $num, $var);
+ &generate_init($type, $num, $var, $name_printed);
+ } elsif ($name_printed) {
+ print ";\n";
+ $init =~ s/^;//;
} else {
eval qq/print "\\t$var;\\n"/;
warn $@ if $@;
if (defined($defaults{$var})) {
$expr =~ s/(\t+)/$1 /g;
$expr =~ s/ /\t/g;
- eval qq/print "\\t$var;\\n"/;
- warn $@ if $@;
+ if ($name_printed) {
+ print ";\n";
+ } else {
+ eval qq/print "\\t$var;\\n"/;
+ warn $@ if $@;
+ }
$deferred .= eval qq/"\\n\\tif (items < $num)\\n\\t $var = $defaults{$var};\\n\\telse {\\n$expr;\\n\\t}\\n"/;
warn $@ if $@;
} elsif ($ScopeThisXSUB or $expr !~ /^\t\$var =/) {
- eval qq/print "\\t$var;\\n"/;
- warn $@ if $@;
+ if ($name_printed) {
+ print ";\n";
+ } else {
+ eval qq/print "\\t$var;\\n"/;
+ warn $@ if $@;
+ }
$deferred .= eval qq/"\\n$expr;\\n"/;
warn $@ if $@;
} else {
+ die "panic: do not know how to handle this branch for function pointers"
+ if $name_printed;
eval qq/print "$expr;\\n"/;
warn $@ if $@;
}
}
sub map_type {
- my($type) = @_;
+ my($type, $varname) = @_;
$type =~ tr/:/_/;
$type =~ s/^array\(([^,]*),(.*)\).*/$1 */s;
+ if ($varname) {
+ if ($varname && $type =~ / \( \s* \* (?= \s* \) ) /xg) {
+ (substr $type, pos $type, 0) = " $varname ";
+ } else {
+ $type .= "\t$varname";
+ }
+ }
$type;
}
https://perl5.git.perl.org / perl5.git / blobdiff