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namespace Eva {
public interface Term : Object {
public abstract string to_string();
public abstract void encode(Erl.Buffer buffer);
public static Term decode(void *buffer) {
int index = 0;
int version;
Erl.decode_version(buffer, ref index, out version);
return do_decode(buffer, ref index);
}
private static Term do_decode(void *buffer, ref int index) {
int type, size;
assert(Erl.get_type(buffer, ref index, out type, out size) == 0);
switch(type) {
case Erl.TermType.SMALL_INTEGER:
char value;
assert(Erl.decode_char(buffer, ref index, out value) == 0);
return new Int((uchar)value);
case Erl.TermType.INTEGER:
long value;
assert(Erl.decode_long(buffer, ref index, out value) == 0);
return new Int(value);
case Erl.TermType.FLOAT:
double value;
assert(Erl.decode_double(buffer, ref index, out value) == 0);
return new Double(value);
case Erl.TermType.ATOM:
char[] value = new char[size+1];
assert(Erl.decode_atom(buffer, ref index, value) == 0);
return new Atom(((string)value).ndup(size));
case Erl.TermType.SMALL_TUPLE:
case Erl.TermType.LARGE_TUPLE:
assert(Erl.decode_tuple_header(buffer, ref index, out size) == 0);
Tuple term = new Tuple();
for(int i = 0; i < size; ++i) {
term.value.add(do_decode(buffer, ref index));
}
return term;
case Erl.TermType.NIL:
case Erl.TermType.LIST:
List term = new List();
while(true) {
assert(Erl.decode_list_header(buffer, ref index, out size) == 0);
if(size == 0)
break;
for(int i = 0; i < size; ++i) {
term.value.add(do_decode(buffer, ref index));
}
}
return term;
case Erl.TermType.STRING:
char[] value = new char[size+1];
assert(Erl.decode_string(buffer, ref index, value) == 0);
return new String(((string)value).ndup(size));
case Erl.TermType.BINARY:
char[] value = new char[size];
stdout.printf("Size: %i\n", size);
long l;
assert(Erl.decode_binary(buffer, ref index, value, out l) == 0);
return new Binary(value);
default:
assert_not_reached();
}
}
}
public class Int : Object, Term {
public long value {get; construct;}
public Int(long v) {
Object(value: v);
}
public string to_string() {
return value.to_string();
}
public void encode(Erl.Buffer buffer) {
buffer.encode_long(value);
}
}
public class UInt : Object, Term {
public ulong value {get; construct;}
public UInt(ulong v) {
Object(value: v);
}
public string to_string() {
return value.to_string();
}
public void encode(Erl.Buffer buffer) {
buffer.encode_ulong(value);
}
}
public class Double : Object, Term {
public double value {get; construct;}
public Double(double v) {
Object(value: v);
}
public string to_string() {
return value.to_string();
}
public void encode(Erl.Buffer buffer) {
buffer.encode_double(value);
}
}
public class Atom : Object, Term {
public string value {get; construct;}
public Atom(string v) {
Object(value: v);
}
public string to_string() {
return value.to_string();
}
public void encode(Erl.Buffer buffer) {
buffer.encode_atom(value.to_utf8());
}
}
public class Tuple : Object, Term {
public Gee.List<Term?> value {get; construct;}
public Tuple() {
Gee.List<Term?> list = new Gee.ArrayList<Term?>();
Object(value: list);
}
public string to_string() {
string ret = "{";
bool first = true;
foreach(Term term in value) {
if(first) {
first = false;
ret += term.to_string();
}
else {
ret += "," + term.to_string();
}
}
return ret + "}";
}
public void encode(Erl.Buffer buffer) {
buffer.encode_tuple_header(value.size);
foreach(Term term in value) {
term.encode(buffer);
}
}
}
public class List : Object, Term {
public Gee.List<Term?> value {get; construct;}
public List() {
Gee.List<Term?> list = new Gee.LinkedList<Term?>();
Object(value: list);
}
public string to_string() {
string ret = "[";
bool first = true;
foreach(Term term in value) {
if(first) {
first = false;
ret += term.to_string();
}
else {
ret += "," + term.to_string();
}
}
return ret + "]";
}
public void encode(Erl.Buffer buffer) {
if(!value.is_empty) {
buffer.encode_list_header(value.size);
foreach(Term term in value) {
term.encode(buffer);
}
}
buffer.encode_empty_list();
}
}
public class String : Object, Term {
public string value {get; construct;}
public String(string v) {
Object(value: v);
}
public string to_string() {
return value.to_string();
}
public void encode(Erl.Buffer buffer) {
buffer.encode_string(value.to_utf8());
}
}
public class Binary : Object, Term {
public void* value {get; private set;}
public long len {get; private set;}
public Binary(char[] v) {
value = Memory.dup(v, (uint)(sizeof(char)*v.length));
len = v.length;
}
public string to_string() {
return "[[Binary]]";
}
public void encode(Erl.Buffer buffer) {
buffer.encode_binary((char*)value, len);
}
}
}
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