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# build parse functions for a parsed struct file
function elem_name(v, elem)
{
return v["UNION"]elem;
}
function parse_array(f, v, elnum, flags,
LOCAL, type, elem)
{
type = elements[elnum, "type"];
elem = elements[elnum, "elem"];
v["ELEM"] = elem_name(v, elem);
v["TYPE"] = type;
v["FLAGS"] = flags;
v["ARRAY_LEN"] = elements[elnum, "array_len"];
if (type == "wchar") {
print_template(f, "prs_wstring.tpl", v);
} else {
print_template(f, "prs_array.tpl", v);
}
}
function parse_element(f, v, elnum, flags,
LOCAL, type, elem)
{
type = elements[elnum, "type"];
if (substr(type,1,1) == ".") return;
elem = elements[elnum, "elem"];
if (elements[elnum,"ptr"] == "") {
v["PTR"] = "\\&";
} else {
v["PTR"] = " ";
}
v["ELEM"] = elem_name(v, elem);
v["TYPE"] = type;
v["FLAGS"] = flags;
print_template(f, "prs_element.tpl", v);
}
function parse_union(f, v, elnum, flags,
LOCAL, i)
{
v["UNION"] = elements[elnum, "elem"];
v["SWITCH"] = elements[elnum, "switch"];
if (elements[elnum, "ptr"] == "1") {
v["UNION"] = v["UNION"]"->";
} else {
v["UNION"] = v["UNION"]".";
}
print_template(f, "union_start.tpl", v);
for (i=0;i<unions[elnum, "num_elems"];i++) {
v["CASE"] = elements[unions[elnum, i], "case"];
print_template(f, "prs_case.tpl", v);
if (elements[elnum, "ptr"] == "1") {
parse_scalars(f, v, unions[elnum, i], "PARSE_SCALARS");
parse_buffers(f, v, unions[elnum, i], "PARSE_BUFFERS");
} else {
if (flags == "PARSE_SCALARS") {
parse_scalars(f, v, unions[elnum, i], flags);
} else {
parse_buffers(f, v, unions[elnum, i], flags);
}
}
print_template(f, "prs_break.tpl", v);
}
v["UNION"] = "";
print_template(f, "union_end.tpl", v);
}
function parse_scalar(f, v, elnum, flags)
{
if (elements[elnum, "type"] == "union") {
parse_union(f, v, elnum, flags);
} else if (elements[elnum, "array_len"]!="") {
parse_array(f, v, elnum, flags);
} else {
parse_element(f, v, elnum, flags);
}
}
function parse_pointer(f, v, elnum, flags,
LOCAL, elem)
{
elem = elements[elnum, "elem"];
v["ELEM"] = elem_name(v, elem);
v["FLAGS"] = flags;
print_template(f, "prs_pointer.tpl", v);
}
function parse_scalars(f, v, elnum, flags)
{
if (elements[elnum, "ptr"] == "1") {
parse_pointer(f, v, elnum, flags);
} else {
parse_scalar(f, v, elnum, flags);
}
}
function parse_buffers(f, v, elnum, flags,
LOCAL, elem, type)
{
elem = elements[elnum, "elem"];
type = elements[elnum, "type"];
v["ELEM"] = elem_name(v, elem);
if (elements[elnum, "ptr"] == "1") {
print_template(f, "ifptr_start.tpl", v);
parse_scalar(f, v, elnum, "PARSE_SCALARS|PARSE_BUFFERS");
print_template(f, "ifptr_end.tpl", v);
} else {
parse_scalar(f, v, elnum, flags);
}
}
function struct_parser(f, v, struct_num,
LOCAL, i, n1)
{
v["STRUCTNAME"] = structs[struct_num, "name"];
v["FUNCNAME"] = "io_" v["STRUCTNAME"];
print_template(f, "fn_start.tpl", v);
for (n1=0;n1<structs[struct_num, "num_elems"];n1++) {
if (elements[structs[struct_num, n1], "type"] == ".trailer") break;
}
# first all the structure pointers, scalars and arrays
for (i=0;i<n1;i++) {
parse_scalars(f, v, structs[struct_num, i], "PARSE_SCALARS");
}
print_template(f, "fn_mid.tpl", v);
# now the buffers
for (i=0;i<n1;i++) {
parse_buffers(f, v, structs[struct_num, i], "PARSE_BUFFERS");
}
# and any trailers
for (i=n1;i<structs[struct_num, "num_elems"];i++) {
parse_scalars(f, v, structs[struct_num, i], "PARSE_SCALARS");
parse_buffers(f, v, structs[struct_num, i], "PARSE_BUFFERS");
}
print_template(f, "fn_end.tpl", v);
}
function produce_parsers(f,
LOCAL, v, i)
{
v["MODULE"]=module;
print_template(f, "module_start.tpl", v);
for (i=0;i < num_structs;i++) {
struct_parser(f, v, i);
}
print_template(f, "module_end.tpl", v);
}
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