From ceb277ced9ccd13936384e94c567b37c5db2c46e Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 8 Jul 2005 03:10:30 +0000
Subject: r8213: I've started to understand the LEVELS stuff in pidl much
 better now, and have re-coded the push side of the ejs generator to use it
 properly. It ends up being very neat and small, and should handle much more
 complex structures (like arrays of pointers to unions etc).

Also added push side support for unions. This should get more of the
echo pipe working via ejs.
(This used to be commit 2e306be1d83f722c259c4a63233e77d8bb1d5a72)
---
 source4/build/pidl/ejs.pm | 146 +++++++++++++++++++++++++++++-----------------
 1 file changed, 93 insertions(+), 53 deletions(-)

(limited to 'source4/build')

diff --git a/source4/build/pidl/ejs.pm b/source4/build/pidl/ejs.pm
index e983a5ce49..db8db00014 100644
--- a/source4/build/pidl/ejs.pm
+++ b/source4/build/pidl/ejs.pm
@@ -23,7 +23,9 @@ sub GenerateStructEnv($)
 	my %env;
 
 	foreach my $e (@{$x->{ELEMENTS}}) {
-		$env{$e->{NAME}} = "r->$e->{NAME}";
+		if ($e->{NAME}) {
+			$env{$e->{NAME}} = "r->$e->{NAME}";
+		}
 	}
 
 	$env{"this"} = "r";
@@ -184,6 +186,13 @@ sub EjsEnumPull($$)
 	pidl "}\n\n";
 }
 
+###########################
+# pull a bitmap
+sub EjsBitmapPull($$)
+{
+# ignored for now
+}
+
 
 ###########################
 # generate a structure pull
@@ -196,8 +205,10 @@ sub EjsTypedefPull($)
 		EjsUnionPull($d->{NAME}, $d->{DATA});
 	} elsif ($d->{DATA}->{TYPE} eq 'ENUM') {
 		EjsEnumPull($d->{NAME}, $d->{DATA});
+	} elsif ($d->{DATA}->{TYPE} eq 'BITMAP') {
+		EjsBitmapPull($d->{NAME}, $d->{DATA});
 	} else {
-		warn "Unhandled pull typedef $d->{NAME} of type $d->{TYPE}\n";
+		warn "Unhandled pull typedef $d->{NAME} of type $d->{DATA}->{TYPE}\n";
 	}
 }
 
@@ -225,83 +236,87 @@ sub EjsPullFunction($)
 
 
 ###########################
-# pull a scalar element
-sub EjsPushScalar($$$)
+# push a scalar element
+sub EjsPushScalar($$$$$)
 {
-	my $e = shift;
-	my $l = shift;
-	my $env = shift;
-	my $var = util::ParseExpr($e->{NAME}, $env);
-
+	my ($e, $l, $var, $name, $env) = @_;
 	$var = get_pointer_to($var);
-
-	pidl "\tNDR_CHECK(ejs_push_$e->{TYPE}(ejs, v, \"$e->{NAME}\", $var));\n";
+	pidl "\tNDR_CHECK(ejs_push_$e->{TYPE}(ejs, v, $name, $var));\n";
 }
 
 ###########################
-# pull a string element
-sub EjsPushString($$$)
+# push a string element
+sub EjsPushString($$$$$)
 {
-	my $e = shift;
-	my $l = shift;
-	my $env = shift;
-	my $var = util::ParseExpr($e->{NAME}, $env);
-
-	pidl "\tNDR_CHECK(ejs_push_string(ejs, v, \"$e->{NAME}\", $var));\n";
+	my ($e, $l, $var, $name, $env) = @_;
+	pidl "\tNDR_CHECK(ejs_push_string(ejs, v, $name, $var));\n";
 }
 
 ###########################
-# pull a pointer element
-sub EjsPushPointer($$$)
+# push a pointer element
+sub EjsPushPointer($$$$$)
 {
-	my $e = shift;
-	my $l = shift;
-	my $env = shift;
-	my $var = util::ParseExpr($e->{NAME}, $env);
-
-	while ($l->{TYPE} eq "POINTER") {
-		$var = get_value_of($var);
-		$l = Ndr::GetNextLevel($e, $l);
-	}
-	$var = get_pointer_to($var);		
+	my ($e, $l, $var, $name, $env) = @_;
+	$var = get_value_of($var);		
+	EjsPushElement($e, Ndr::GetNextLevel($e, $l), $var, $name, $env);
+}
 
-	pidl "\tNDR_CHECK(ejs_push_$e->{TYPE}(ejs, v, \"$e->{NAME}\", $var));\n";
+###########################
+# push a switch element
+sub EjsPushSwitch($$$$$)
+{
+	my ($e, $l, $var, $name, $env) = @_;
+	my $switch_var = util::ParseExpr($l->{SWITCH_IS}, $env);
+	pidl "ejs_set_switch(ejs, $switch_var);\n";
+	EjsPushElement($e, Ndr::GetNextLevel($e, $l), $var, $name, $env);
 }
 
 
 ###########################
 # push an arrar element
 # only handles a very limited range of array types so far
-sub EjsPushArray($$$)
+sub EjsPushArray($$$$$)
 {
-	my $e = shift;
-	my $l = shift;
-	my $env = shift;
+	my ($e, $l, $var, $name, $env) = @_;
 	my $length = util::ParseExpr($l->{LENGTH_IS}, $env);
-	my $var = util::ParseExpr($e->{NAME}, $env);
-	pidl "\tNDR_CHECK(ejs_push_array(ejs, v, \"$e->{NAME}\", $length, sizeof($var\[0]), (void *)$var, (ejs_push_t)ejs_push_$e->{TYPE}));\n";
+	pidl "{ uint32_t i; for (i=0;i<$length;i++) {\n";
+	pidl "\tconst char *id = talloc_asprintf(ejs, \"%s.%u\", $name, i);\n";
+	EjsPushElement($e, Ndr::GetNextLevel($e, $l), $var . "[i]", "id", $env);
+	pidl "}\nejs_push_uint32(ejs, v, $name \".length\", &i); }\n";
 }
 
-###########################
-# push a structure element
-sub EjsPushElement($$)
+################################
+# push a structure/union element
+sub EjsPushElement($$$$$)
 {
-	my $e = shift;
-	my $env = shift;
-	my $l = $e->{LEVELS}[0];
+	my ($e, $l, $var, $name, $env) = @_;
 	if (util::has_property($e, "charset")) {
-		EjsPushString($e, $l, $env);
+		EjsPushString($e, $l, $var, $name, $env);
 	} elsif ($l->{TYPE} eq "ARRAY") {
-		EjsPushArray($e, $l, $env);
+		EjsPushArray($e, $l, $var, $name, $env);
 	} elsif ($l->{TYPE} eq "DATA") {
-		EjsPushScalar($e, $l, $env);
+		EjsPushScalar($e, $l, $var, $name, $env);
 	} elsif (($l->{TYPE} eq "POINTER")) {
-		EjsPushPointer($e, $l, $env);
+		EjsPushPointer($e, $l, $var, $name, $env);
+	} elsif (($l->{TYPE} eq "SWITCH")) {
+		EjsPushSwitch($e, $l, $var, $name, $env);
 	} else {
 		pidl "return ejs_panic(ejs, \"unhandled push type $l->{TYPE}\");\n";
 	}
 }
 
+#############################################
+# push a structure/union element at top level
+sub EjsPushElementTop($$)
+{
+	my $e = shift;
+	my $env = shift;
+	my $l = $e->{LEVELS}[0];
+	my $var = util::ParseExpr($e->{NAME}, $env);
+	my $name = "\"$e->{NAME}\"";
+	EjsPushElement($e, $l, $var, $name, $env);
+}
+
 ###########################
 # push a struct
 sub EjsStructPush($$)
@@ -312,7 +327,7 @@ sub EjsStructPush($$)
 	pidl "\nstatic NTSTATUS ejs_push_$name(struct ejs_rpc *ejs, struct MprVar *v, const char *name, const struct $name *r)\n{\n";
 	pidl "\tNDR_CHECK(ejs_push_struct_start(ejs, &v, name));\n";
         foreach my $e (@{$d->{ELEMENTS}}) {
-		EjsPushElement($e, $env);
+		EjsPushElementTop($e, $env);
 	}
 	pidl "\treturn NT_STATUS_OK;\n";
 	pidl "}\n\n";
@@ -324,9 +339,25 @@ sub EjsUnionPush($$)
 {
 	my $name = shift;
 	my $d = shift;
+	my $have_default = 0;
+	my $env = GenerateStructEnv($d);
 	pidl "\nstatic NTSTATUS ejs_push_$name(struct ejs_rpc *ejs, struct MprVar *v, const char *name, const union $name *r)\n{\n";
-	pidl "return ejs_panic(ejs, \"union push not handled\");\n";
-	pidl "}\n\n";
+	pidl "switch (ejs->switch_var) {\n";
+	foreach my $e (@{$d->{ELEMENTS}}) {
+		if ($e->{CASE} eq "default") {
+			$have_default = 1;
+		}
+		pidl "$e->{CASE}:";
+		if ($e->{TYPE} ne "EMPTY") {
+			EjsPushElementTop($e, $env);
+		}
+		pidl "break;\n";
+	}
+	if (! $have_default) {
+		pidl "default:";
+		pidl "\treturn ejs_panic(ejs, \"Bad switch value\");";
+	}
+	pidl "}\nreturn NT_STATUS_OK;\n}\n";
 }
 
 ###########################
@@ -342,6 +373,13 @@ sub EjsEnumPush($$)
 	pidl "}\n\n";
 }
 
+###########################
+# push a bitmap
+sub EjsBitmapPush($$)
+{
+	# ignored for now
+}
+
 
 ###########################
 # generate a structure push
@@ -354,8 +392,10 @@ sub EjsTypedefPush($)
 		EjsUnionPush($d->{NAME}, $d->{DATA});
 	} elsif ($d->{DATA}->{TYPE} eq 'ENUM') {
 		EjsEnumPush($d->{NAME}, $d->{DATA});
+	} elsif ($d->{DATA}->{TYPE} eq 'BITMAP') {
+		EjsBitmapPush($d->{NAME}, $d->{DATA});
 	} else {
-		warn "Unhandled push typedef $d->{NAME} of type $d->{TYPE}\n";
+		warn "Unhandled push typedef $d->{NAME} of type $d->{DATA}->{TYPE}\n";
 	}
 }
 
@@ -374,7 +414,7 @@ sub EjsPushFunction($)
 
 	foreach my $e (@{$d->{ELEMENTS}}) {
 		next unless (grep(/out/, @{$e->{DIRECTION}}));
-		EjsPushElement($e, $env);
+		EjsPushElementTop($e, $env);
 	}
 
 	pidl "\treturn NT_STATUS_OK;\n";
-- 
cgit