From b7022e94d2ab62d522b0a7c2886cce3afaff6872 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Sun, 14 May 2000 14:05:10 +0000
Subject: vastly improved awk based code generator now handles recursive
 function definitions, unions etc it is sufficient for some basic types like
 UNISTR2 and BUFFER5 to be defined in the *.struct file and used successfully

this generator uses templates (in *.tpl files) for all code
generation, allowing easy replacement of the backend functions
(This used to be commit 14ded82dc92ae6eff7639351f391a33b9cc31c0d)
---
 source3/aparser/parsetree.awk | 64 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 source3/aparser/parsetree.awk

(limited to 'source3/aparser/parsetree.awk')

diff --git a/source3/aparser/parsetree.awk b/source3/aparser/parsetree.awk
new file mode 100644
index 0000000000..e0f946a663
--- /dev/null
+++ b/source3/aparser/parsetree.awk
@@ -0,0 +1,64 @@
+# build the parse tree for a struct file
+
+function start_module(name) 
+{
+	module=name;
+	num_structs=0;
+}
+
+function start_struct(name) 
+{
+	current_struct=num_structs;
+	structs[name]=current_struct;
+	structs[current_struct, "name"]=name;
+	structs[current_struct, "num_elems"]=0;
+	structs[current_struct, "num_unions"]=0;
+}
+
+function end_struct() 
+{
+	num_structs++;
+	current_struct="";
+}
+
+function add_elem(type, elem,
+		  LOCAL, elem_num)
+{
+	elem_num=structs[current_struct, "num_elems"];
+	structs[current_struct, elem_num, "type"] = type;
+	structs[current_struct, elem_num, "elem"] = elem;
+	structs[current_struct, elem_num, "array_len"] = "";
+	structs[current_struct, "num_elems"]++;
+	return elem_num;
+}
+
+function add_array(array_len, type, elem,
+		   LOCAL, elem_num)
+{
+	elem_num=add_elem(type, elem);
+	structs[current_struct, elem_num, "array_len"] = array_len;
+}
+
+function start_union(switch, elem) 
+{
+	current_union=elem;
+	add_elem("union", elem);
+	structs[current_struct, "unions", current_union, "switch"] = switch;
+	structs[current_struct, "unions", current_union, "num_elems"] = 0;
+}
+
+function parse_case(value, type, elem,
+		    LOCAL, elem_num) 
+{
+	elem_num =structs[current_struct, "unions", current_union, "num_elems"];
+	structs[current_struct, "unions", current_union, elem_num, "type"] = type;
+	structs[current_struct, "unions", current_union, elem_num, "elem"] = elem;
+	structs[current_struct, "unions", current_union, elem_num, "value"] = value;
+	structs[current_struct, "unions", current_union, "num_elems"]++;
+}
+
+function end_union() 
+{
+	current_union="";
+}
+
-- 
cgit