From 1b2562ed6503f3bb7c19514b5e9571c1fcb79360 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 7 Jul 2010 23:59:18 +0200
Subject: Added equality checks

---
 src/Term.vala | 179 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)

diff --git a/src/Term.vala b/src/Term.vala
index 1e063c1..7037e48 100644
--- a/src/Term.vala
+++ b/src/Term.vala
@@ -1,6 +1,7 @@
 namespace Eva {
   public interface Term : Object {
     public abstract string to_string();
+    public abstract bool equals(Term o);
     
     public abstract void encode(Erl.Buffer buffer);
     
@@ -108,6 +109,18 @@ namespace Eva {
       return value.to_string();
     }
     
+    public bool equals(Term o) {
+      if(o is Int) {
+        return value == (o as Int).value;
+      }
+      else if(o is UInt) {
+        return value == (o as UInt).value;
+      }
+      else {
+        return false;
+      }
+    }
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_long(value);
     }
@@ -124,6 +137,19 @@ namespace Eva {
       return value.to_string();
     }
     
+    public bool equals(Term o) {
+      if(o is Int) {
+        return value == (o as Int).value;
+      }
+      else if(o is UInt) {
+        return value == (o as UInt).value;
+      }
+      else {
+        return false;
+      }
+    }
+
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_ulong(value);
     }
@@ -140,6 +166,15 @@ namespace Eva {
       return value.to_string();
     }
     
+    public bool equals(Term o) {
+      if(o is Double) {
+        return value == (o as Double).value;
+      }
+      else {
+        return false;
+      }
+    }
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_double(value);
     }
@@ -156,6 +191,15 @@ namespace Eva {
       return value.to_string();
     }
     
+    public bool equals(Term o) {
+      if(o is Atom) {
+        return value == (o as Atom).value;
+      }
+      else {
+        return false;
+      }
+    }
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_atom(value.to_utf8());
     }
@@ -186,6 +230,23 @@ namespace Eva {
       return ret + "}";
     }
     
+    public bool equals(Term o) {
+      if(!(o is Tuple))
+        return false;
+      
+      Tuple t = o as Tuple;
+      
+      if(t.value.size != value.size)
+        return false;
+      
+      for(int i = 0; i < value.size; ++i) {
+        if(!value[i].equals(t.value[i]))
+          return false;
+      }
+      
+      return true;
+    }
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_tuple_header(value.size);
       
@@ -222,6 +283,61 @@ namespace Eva {
       tail = null;
     }
     
+    public bool equals(Term o) {
+      if(o is List) {
+        List l = o as List;
+        
+        if(list.size != l.list.size)
+          return false;
+        if((tail == null) != (l.tail == null))
+          return false;
+        if(tail != null && !tail.equals(l.tail))
+          return false;
+        
+        Gee.Iterator<Term> lt = l.list.iterator();
+        lt.first();
+        foreach(Term t in list) {
+          if(!t.equals(lt.get()))
+            return false;
+          
+          lt.next();
+        }
+        
+        return true;
+      }
+      else if(o is String) {
+        if(tail != null)
+          return false;
+        
+        string s = "";
+        
+        foreach(Term t in list) {
+          if(t is Int) {
+            Int i = t as Int;
+            if(i.value < 0 || i.value > 255)
+              return false;
+            
+            s += i.value.to_string("%c");
+          }
+          else if(t is UInt) {
+            UInt i = t as UInt;
+            if(i.value > 255)
+              return false;
+            
+            s += i.value.to_string("%c");
+          }
+          else {
+            return false;
+          }
+        }
+        
+        return (s == (o as String).value);
+      }
+      else {
+        return false;
+      }
+    }
+    
     public string to_string() {
       string ret = "[";
       bool first = true;
@@ -269,6 +385,18 @@ namespace Eva {
       return value.to_string();
     }
     
+    public bool equals(Term o) {
+      if(o is String) {
+        return (value == (o as String).value);
+      }
+      else if(o is List) {
+        return o.equals(this);
+      }
+      else {
+        return false;
+      }
+    }
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_string(value.to_utf8());
     }
@@ -287,6 +415,21 @@ namespace Eva {
       return "#Bin";
     }
     
+    public bool equals(Term o) {
+      if(o is Binary) {
+        Binary b = o as Binary;
+        
+        if(b.len != len)
+          return false;
+        
+        return (Memory.cmp(value, b.value, len) == 0);
+      }
+      else {
+        return false;
+      }
+    }
+
+    
     public void encode(Erl.Buffer buffer) {
       buffer.encode_binary((char*)value, len);
     }
@@ -310,6 +453,15 @@ namespace Eva {
       return "<" + node + "." + num.to_string() + "." + serial.to_string() + ">";
     }
     
+    public bool equals(Term o) {
+      if(!(o is Pid))
+        return false;
+      
+      Pid p = o as Pid;
+      
+      return (node == p.node && num == p.num && serial == p.serial && creation == p.creation);
+    }
+    
     public void encode(Erl.Buffer buffer) {
       Erl.Pid pid = Erl.Pid();
       char[] nodedata = node.to_utf8();
@@ -342,6 +494,15 @@ namespace Eva {
       return "#Port";
     }
     
+    public bool equals(Term o) {
+      if(!(o is Port))
+        return false;
+      
+      Port p = o as Port;
+      
+      return (node == p.node && id == p.id && creation == p.creation);
+    }
+    
     public void encode(Erl.Buffer buffer) {
       Erl.Port port = Erl.Port();
       char[] nodedata = node.to_utf8();
@@ -379,6 +540,24 @@ namespace Eva {
       return "#Ref";
     }
     
+    public bool equals(Term o) {
+      if(!(o is Ref))
+        return false;
+      
+      Ref r = o as Ref;
+      
+      if(node != r.node || len != r.len || creation != r.creation) {
+        return false;
+      }
+      
+      for(int i = 0; i < len; ++i) {
+        if(n[i] != r.n[i])
+          return false;
+      }
+      
+      return true;
+    }
+    
     public void encode(Erl.Buffer buffer) {
       Erl.Ref reference = Erl.Ref();
       char[] nodedata = node.to_utf8();
-- 
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