-#!/usr/bin/perl
+#!/usr/bin/perl -w
+
+# code generator to help with writing Tcl extensions
+# Copyright 2006-2012 Ian Jackson
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses/>.
+
# Input format is line-based, ws-significant, offside rule (some kind
# of, anyway).
# Arranges for generated .h files to #include the specified
# file. C-INCLUDE-SPECIFIER should include the <..> or "..".
#
-# Table TABLENAME C-ENTRY-TYPE
+# Table [*]TABLENAME C-ENTRY-TYPE
# Starts a table of commands or subcommands. The generated .h
# will contain a definition of C-ENTRY-TYPE containing
# const char *name;
# where C-ARRAY-NAME is TABLENAME, with `_entries' appended
# and `cht_' prepended. The entries are indented one level (one
# or more spaces) and look like this:
-# ENTRYNAME
+# ENTRYNAME [ C-EXTRA-ENTRY-VALUES ]
# FORMALARGNAME TYPE
# ...
# [ => RESULT-TYPE ]
# implement the function. If the `=> RESULT-TYPE' is omitted, so
# is the result argument to the function. Each argument to the
# function is of the C type corresponding to the specified type.
+# TYPE may be `...', in which case the C function will be passed
+# two args (int objc, Tcl_Obj *const *objv) for the remaining
+# arguments.
+#
# The cht_do_... function should not eat any memory associated with
# the arguments. The result buffer (if any) will be initialised
# using the `Init' and should on success contain the relevant
# result. On failure it should leave the result unmodified (or at
# least, not in need of freeing).
#
+# As an alternative, the arguments can be replaced with just
+# dispatch(TYPE-ARGS-FOR-ENUM)
+# which is a shorthand for
+# subcmd enum(TYPE-ARGS-FOR-ENUM)
+# args ...
+# and also generates and uses a standard dispatch function.
+#
# There will be an entry in C-ARRAY-NAME for every table entry.
# The name will be ENTRYNAME, and the func will be a function
# suitable for use as a Tcl command procedure, which parses the
# arguments, processes the command, and sets any result, as
# applicable.
#
-# ExtraEntry C-ENTRY-TYPE
+# `*' should be used if the table name is not useful for error
+# messages. It suppresses `TABLENAME ' from the front of the
+# autogenerated argument parsing error strings.
+#
+# EntryExtra C-ENTRY-TYPE
# Introduces a section of additional C code which will be inserted
# into the definition of C-ENTRY-TYPE by `Table'. The C
# code, which follows on several indented lines, should be
# structure member definitions.
#
-# When ExtraEntry is used, in the corresponding Table, each
+# When EntryExtra is used, in the corresponding Table, each
# ENTRYNAME should be followed on the same line by whitespace and
# EXTRA-VALUES; the EXTRA-VALUES are used as initialisers for the
# additional structure elements.
# and the two predefined types `int' (C `int') and `obj' (Tcl_Obj*,
# unmodified.) The corresponding definitions are in tcmdiflib.c.
-use IO;
+use strict;
+use IO::File;
use Data::Dumper;
+our (%o, $oh);
+our ($prefix, $write, $output);
+our (%tables, %table_x, %entrytype_x);
+our (%types, %type_init, %type_fini);
+
+sub parse ($$);
+sub subst_in_decl ($$;$);
+sub subst_in ($$;$);
+sub o ($$$);
+sub make_decl ($$$;$);
+sub make_decl_init ($$$$;$);
+
parse('builtins','DATA');
while (@ARGV) {
die "unknown option $_\n";
} else {
if (!defined $prefix) { $prefix= $_; $prefix =~ s/\.[^.]+$//; }
- $x= new IO::File $_,'r' or die "$_: $!\n";
+ my $x= new IO::File $_,'r' or die "$_: $!\n";
parse($_,$x);
}
}
die "must say -w<something>\n" if !defined $write;
+our ($c_entry, $c_entrytype);
+our ($c_table, $c_entryextra, $c_of);
+
sub zilch () {
undef $c_table;
undef $c_entryextra;
sub parse ($$) {
my ($wh,$f) = @_;
+ my @i;
while (defined($_= $f->getline)) {
chomp; s/\s+$//;
next if m/^\s*\#/;
while (s/\t/ ' 'x(8 - (length $`) % 8) /e) { }
s/^\s*//;
- $this_indent= length $&;
+ my $this_indent= length $&;
while (@i && $this_indent < $i[0]) {
shift @i;
}
unshift @i, $this_indent;
}
- if (@i==0 && m/^Table\s+(\w+)\s+(\w+)$/) {
+ if (@i==0 && m/^Table\s+(\*?)(\w+)\s+(\w+)$/) {
zilch();
- $c_table= $1;
- $table_x{$c_table}{C}= $2;
- $entrytype_x{$2}= '' unless exists $entrytype_x{$2};
+ $c_table= $2;
+ $table_x{$c_table}{T}= $1;
+ $table_x{$c_table}{C}= $3;
+ $entrytype_x{$3}= '' unless exists $entrytype_x{$3};
} elsif (@i==0 && m/^Untabled$/) {
zilch();
$c_table= '';
$tables{$c_table}{$c_entry}{A} = [ ];
} elsif (@i==2 && m/^\.\.\.\s+(\w+)$/ && defined $c_entry) {
$tables{$c_table}{$c_entry}{V}= $1;
+ } elsif (@i==2 && m:^dispatch\(((.*)/(.*)\,.*)\)$: && defined $c_entry) {
+ my $enumargs= $1;
+ my $subcmdtype= $2.$3;
+ $tables{$c_table}{$c_entry}{D}= $subcmdtype;
+ $tables{$c_table}{$c_entry}{V}= 'obj';
+ push @{ $tables{$c_table}{$c_entry}{A} },
+ { N => 'subcmd', T => 'enum', A => $enumargs, O => '' };
} elsif (@i==2 && m/^(\??)([a-z]\w*)\s*(\S.*)/
&& defined $c_entry) {
- ($opt, $var, $type) = ($1,$2,$3);
- ($type, $xtypeargs) = split_type_args($type);
+ my ($opt, $var, $typea) = ($1,$2,$3);
+ my ($type, $xtypeargs) = split_type_args($wh,$typea);
push @{ $tables{$c_table}{$c_entry}{A} },
{ N => $var, T => $type, A => $xtypeargs, O => ($opt eq '?') };
} elsif (@i==2 && m/^\=\>\s*(\S.*)$/ && defined $c_entry) {
- ($type, $xtypeargs) = split_type_args($1);
+ my ($type, $xtypeargs) = split_type_args($wh,$1);
$tables{$c_table}{$c_entry}{R}= $type;
$tables{$c_table}{$c_entry}{X}= $xtypeargs;
} elsif (@i==0 && m/^Type\s+([^\:]+)\:\s+(\S.*)$/) {
- ($typename,$ctype)= ($1,$2);
+ my ($typenamea,$ctype)= ($1,$2);
$ctype .= ' @' unless $ctype =~ m/\@/;
- ($typename,$xtypeargs) = split_type_args($typename);
+ my ($typename,$xtypeargs) = split_type_args($wh,$typenamea);
$types{$typename}= { C => $ctype, X => $xtypeargs };
} elsif (@i==0 && s/^Init\s+(\w+)\s+(\S.*)//) {
$type_init{$1}= $2;
#print Dumper(\%tables),"\n";
#print Dumper(\%types),"\n";
-foreach $t (sort keys %types) {
- $type= $types{$t};
- $c= $type->{C};
- $xta= $type->{X};
- $decl= "int cht_pat_$t(Tcl_Interp *ip, Tcl_Obj *obj, ";
+foreach my $t (sort keys %types) {
+ my $type= $types{$t};
+ my $c= $type->{C};
+ my $xta= $type->{X};
+ my $decl= "int cht_pat_$t(Tcl_Interp *ip, Tcl_Obj *obj, ";
$decl .= subst_in_decl('*val', $c, "type $t");
$decl .= ", $xta", if length $xta;
$decl .= ");\n";
"};\n\n");
}
+our (%dispatch_done);
+
foreach $c_table (sort keys %tables) {
- $r_table= $tables{$c_table};
- $x_table= $table_x{$c_table};
- $op_tab= '';
+ my $r_table= $tables{$c_table};
+ my $x_table= $table_x{$c_table};
+ my $op_tab= '';
foreach $c_entry (sort keys %$r_table) {
- $c_entry_c= $c_entry; $c_entry_c =~ y/-/_/;
- $r_entry= $r_table->{$c_entry};
- $pa_decl= "int pa_${c_table}_${c_entry_c}(ClientData cd,".
+ my $c_entry_c= $c_entry; $c_entry_c =~ y/-/_/;
+ my $r_entry= $r_table->{$c_entry};
+ my $pa_decl= "int pa_${c_table}_${c_entry_c}(ClientData cd,".
" Tcl_Interp *ip, int objc, Tcl_Obj *const *objv)";
- $do_decl= "int cht_do_${c_table}_${c_entry_c}(";
- @do_al= ('ClientData cd', 'Tcl_Interp *ip');
- @do_aa= qw(cd ip);
- $pa_init= '';
- $pa_argc= " objc--; objv++;\n";
- $pa_vars= " int rc;\n";
- $pa_body= '';
- $pa_rslt= '';
- $pa_free= '';
- $pa_fini= '';
- $any_mand= 0;
- $any_optl= 0;
- $any_eerr= 0;
- $any_eargc= 0;
- $pa_hint= '';
- $pa_hint .= "$c_table " if length $c_table;
+ my $pa_func= "cht_do_${c_table}_${c_entry_c}";
+ if (exists $r_entry->{D}) {
+ $pa_func= "cht_dispatch_$r_entry->{D}";
+ }
+ my $do_decl= "int $pa_func(";
+ my @do_al= ('ClientData cd', 'Tcl_Interp *ip');
+ my @do_aa= qw(cd ip);
+ my $pa_init= '';
+ my $pa_argc= " objc--; objv++;\n";
+ my $pa_vars= " int rc;\n";
+ my $pa_body= '';
+ my $pa_rslt= '';
+ my $pa_free= '';
+ my $pa_fini= '';
+ my $any_mand= 0;
+ my $any_optl= 0;
+ my $any_eerr= 0;
+ my $any_eargc= 0;
+ my $pa_hint= '';
+ $pa_hint .= "$c_table " if length $c_table &&
+ !length $table_x{$c_table}{T};
$pa_hint.= $c_entry;
- foreach $arg (@{ $r_entry->{A} }) {
- $n= $arg->{N};
- $t= $arg->{T};
- $a= $arg->{A};
+ foreach my $arg (@{ $r_entry->{A} }) {
+ my $n= $arg->{N};
+ my $t= $arg->{T};
+ my $a= $arg->{A};
push @do_al, make_decl($n, $t, $arg->{A},
"table $c_table entry $c_entry arg $n");
$pa_vars .= make_decl_init("a_$n", $t, $a, \$pa_init, "pa_vars");
$any_eargc= 1;
die if $any_optl;
}
- $paarg= "&a_$n";
- $pafin= '';
+ my $paarg= "&a_$n";
+ my $pafin= '';
if ($t eq 'enum') {
$pa_vars .= " const void *v_$n= 0;\n";
$paarg= "&v_$n";
$pafin= "\n a_$n= v_$n; ";
- ($a_tab, $ee_type, $estr) = enumargs($a);
+ my ($a_tab, $ee_type, $estr) = enumargs($a);
$a = "cht_$a_tab, sizeof($ee_type), $estr";
o('h', 210, "extern const $ee_type cht_$a_tab".'[]'.";\n");
}
}
if (exists $r_entry->{V}) {
$pa_hint .= " ...";
- $va= $r_entry->{V};
+ my $va= $r_entry->{V};
push @do_al, subst_in_decl("${va}c", 'int @');
push @do_al, subst_in_decl("${va}v", 'Tcl_Obj *const *@');
push @do_aa, "objc+1", "objv-1";
$pa_body .= "end_optional:\n";
}
if (exists $r_entry->{R}) {
- $t= $r_entry->{R};
- $xta= $r_entry->{X};
+ my $t= $r_entry->{R};
+ my $xta= $r_entry->{X};
push @do_al, make_decl("*result", $t, "cht_do_al result");
$pa_vars .= make_decl_init("result", $t, $xta, \$pa_init,
"pa_vars result");
$pa_rslt .= "));\n";
}
$pa_body .= "\n";
- $pa_body .= " rc= cht_do_${c_table}_${c_entry_c}(";
+ $pa_body .= " rc= $pa_func(";
$pa_body .= join ', ', @do_aa;
$pa_body .= ");\n";
$pa_body .= " if (rc) goto rc_err;\n";
$pa_init .= "\n" if length $pa_init;
$pa_fini .= "}\n\n";
+ my $static;
if (length $c_table) {
$static= 'static ';
} else {
$pa_fini);
$do_decl .= join ', ', @do_al;
$do_decl .= ")";
- o('h',100, $do_decl.";\n") or die $!;
-
+ if (exists $r_entry->{D}) {
+ my $subcmdtype= $r_entry->{D};
+ if (!exists $dispatch_done{$subcmdtype}) {
+ my $di_body='';
+ $di_body .= "static $do_decl {\n";
+ $di_body .= " return subcmd->func(0,ip,objc,objv);\n";
+ $di_body .= "}\n";
+ o('c',50, $di_body) or die $!;
+ }
+ } else {
+ o('h',100, $do_decl.";\n") or die $!;
+ }
$op_tab .= sprintf(" { %-20s %-40s%s },\n",
"\"$c_entry\",",
"pa_${c_table}_${c_entry_c}",
- $r_entry->{I});
+ ($r_entry->{I}) // '');
}
if (length $c_table) {
- $decl= "const $x_table->{C} cht_${c_table}_entries[]";
+ my $decl= "const $x_table->{C} cht_${c_table}_entries[]";
o('h', 500, "extern $decl;\n");
o('c', 100,
"$decl = {\n".
}
}
-o(c, 0, "#include \"$prefix.h\"\n");
+o('c', 0, "#include \"$prefix.h\"\n");
-o(h, 0,
+o('h', 0,
"#ifndef INCLUDED_\U${prefix}_H\n".
- "#define INCLUDED_\U${prefix}_H\n\n".
- "#include <tcl8.3/tcl.h>\n");
+ "#define INCLUDED_\U${prefix}_H\n\n");
-o(h, 999,
+o('h', 999,
"#endif /*INCLUDED_\U${prefix}_H*/\n");
if (defined $output) {
}
print $oh "/* AUTOGENERATED - DO NOT EDIT */\n" or die $!;
-foreach $pr (sort keys %{ $o{$write} }) {
+foreach my $pr (sort keys %{ $o{$write} }) {
print $oh "\n" or die $!;
print $oh $o{$write}{$pr} or die $!;
}
rename "$output.tmp", $output or die $!;
}
-sub o ($$) {
+sub o ($$$) {
my ($wh,$pr,$s) = @_;
$o{$wh}{sprintf "%010d", $pr} .= $s;
}
-sub split_type_args ($) {
- my ($type) = @_;
+sub split_type_args ($$) {
+ my ($wh,$type) = @_;
my ($xtypeargs);
if ($type =~ m/^\w+$/) {
$xtypeargs='';
return ($type,$xtypeargs);
}
-sub make_decl_init ($$$$$) {
+sub make_decl_init ($$$$;$) {
my ($n, $t, $a, $initcode, $why) = @_;
my ($o,$init);
$o= make_decl($n,$t,$a,"$why _init");
return " ".$o.";\n";
}
-sub make_decl ($$$$) {
+sub make_decl ($$$;$) {
my ($n, $t, $ta, $why) = @_;
- my ($type);
+ my ($type, $c);
if ($t eq 'enum') {
- ($a_tab, $ee_type, $estr) = enumargs($ta);
+ my ($a_tab, $ee_type, $estr) = enumargs($ta);
$c= "const $ee_type* @";
} else {
defined $types{$t} or die "unknown type $t ($why)\n";
return subst_in_decl($n,$c);
}
-sub subst_in_decl ($$$) {
+sub subst_in_decl ($$;$) {
my ($val, $pat, $why) = @_;
local ($_) = subst_in($val, $pat, $why);
s/ *(\**) *$/$1/;
return $_;
}
-sub subst_in ($$$) {
+sub subst_in ($$;$) {
my ($val, $pat, $why) = @_;
$pat =~ m/\@/ or die "$pat for $val in $why ?";
$pat =~ s/\@/$val/g;