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namespace BitField {
private static GLib.Tree<string, Type?> list_of_types;
private static GLib.Tree<FieldInfo?, uint16> mask_cash;
void init () {
list_of_types = new GLib.Tree<string, Type?> ((a, b) => {
return (GLib.strcmp (a,b));
});
mask_cash = new GLib.Tree<FieldInfo?, uint16> ((a, b) => {
return a.compare (b);
});
}
void deinit () {
list_of_types.foreach ((_key, _val) => {
list_of_types.remove (_key);
return false;
});
}
/**
* @Return true on error.
*/
public bool add_type (string name, FieldInfo first_field, ...) {
var va = va_list ();
GLib.List<FieldInfo?> lst = new GLib.List<FieldInfo?> ();
lst.append (first_field);
for (FieldInfo? fi = va.arg<FieldInfo> (); fi != null;
fi = va.arg<FieldInfo> ()) {
lst.append (fi);
}
if (lst.length () >= 16) {
return true;
}
lst.sort ((a,b) => {return a.compare (b);});
for (uint8 i = 0; i < lst.length (); i++) {
var a = lst.nth_data (i);
// We valitade the items whilst we are at it.
if (a.validate ()) {
return true;
}
for (uint8 j = i + 1; i < lst.length (); j++) {
var b = lst.nth_data (i);
if (a.overlap (b)) {
GLib.critical ("Overlappinng fields in %s: (%s) (%s).\n" +
"\t Will not add bitmap type defitions.",
lst.nth_data (i).to_string (),
lst.nth_data (j).to_string ());
return true;
}
}
}
Type t = Type ();
for (uint8 i = 0; i < lst.length (); i++) {
t.fields[i] = lst.nth_data (i);
}
return false;
}
public void set_8 (ref uint8 field_id, string type_name, uint8 data) {
}
public struct FieldInfo {
uint8 field_id;
uint8 start;
uint8 end;
uint8 length;
public int compare (FieldInfo other) {
if (this.field_id != other.field_id) {
return other.field_id - this.field_id;
} else if (this.start != other.start) {
return other.start - this.start;
} else if (this.end != other.end) {
return other.end - this.end;
} else if (this.length != other.length) {
return other.length - this.length;
}
#if 0
if (this.start > other.start) {
return -1;
} else if (this.start < other.start) {
return 1;
} else {
if (this.end > other.end) {
return -1;
} else if (this.end < other.end) {
return 1;
} else {
if (this.length > other.length) {
return -1;
} else if (this.length < other.length) {
return 1;
}
}
}
#endif
return 0;
}
[CCode (cname = "bit_field_field_info_compare")]
public static extern int static_campare (FieldInfo a, FieldInfo b);
public bool overlap (FieldInfo other) {
return (!((this.start < other.end) || (this.end > other.start)));
}
[CCode (cname = "bit_field_field_info_overlap")]
public static extern int static_overlap (FieldInfo a, FieldInfo b);
public string to_string () {
return "start: %i, end: %i, length: %i".printf (this.start,
this.end,
this.length);
}
/**
* returns true on error;
*/
public bool validate () {
var distance = this.start - this.end;
if (distance < 1 || distance != this.length) {
GLib.critical ("Validtion if FieldInfo object failed: (%s)",
this.to_string ());
return true;
}
return false;
}
[CCode (cname = "bit_field_field_info_validate")]
public extern static bool static_validate (FieldInfo info);
public uint16 generate_mask () {
uint16 mask = 0;
for (size_t i = 0; i < this.length; i++) {
mask += 0x8000; // set the left-most bit in the field
mask >> 1; // shit it over to the right one.
}
mask >> this.start;
return mask;
}
[CCode (cname = "bit_field_field_generate_mask")]
public extern static uint16 static_generate_mask (FieldInfo info);
}
private struct Type {
FieldInfo[] fields;
Type () {
fields = new FieldInfo[16];
}
public string to_string () {
var sb = new GLib.StringBuilder ();
sb.append (typeof (Type).name ())
.append (": (\n");
for (size_t i = 0; i < fields.length; i++) {
sb.append ("\t (")
.append (fields[i].to_string ())
.append (")\n");
}
sb.append (")\n");
return sb.str;
}
}
}
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