X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=version2%2Fsrc%2FC%2FIoTString.h;h=99e45bb2f287be3ce0e4e549ca812819b8b54ea1;hb=3c985f718d03a555926fb3886af30f19a9b14a33;hp=bbd0c775df095b87fdb5a1748e3669bddc8220f6;hpb=0b9aca2b62c74f68652b170a92271a98d5b96666;p=iotcloud.git

diff --git a/version2/src/C/IoTString.h b/version2/src/C/IoTString.h
index bbd0c77..99e45bb 100644
--- a/version2/src/C/IoTString.h
+++ b/version2/src/C/IoTString.h
@@ -2,17 +2,29 @@
 #define IOTSTRING_H
 
 #include "array.h"
-
+#include <string.h>
+#include <stdio.h>
 /**
  * IoTString wraps the underlying char string.
  * @author Brian Demsky <bdemsky@uci.edu>
  * @version 1.0
  */
 
-public class IoTString {
+inline unsigned int hashCharArray(Array<char> *array) {
+	uint len = array->length();
+	unsigned int hash = 0;
+	for (uint i = 0; i < len; i++) {
+		hash = 31 * hash + ((unsigned int) array->get(i));
+	}
+	return hash;
+}
+
+class IoTString {
 private:
 	Array<char> *array;
-	IoTString() {}
+	unsigned int hashvalue;
+	unsigned int refCount;
+  IoTString() : refCount (1) {}
 
 	/**
 	 * Builds an IoTString object around the char array.  This
@@ -20,8 +32,46 @@ private:
 	 */
 
 public:
-	IoTString(Array<char> *_array) : array(new Array<char>(_array)) {}
-	~IoTString() {}
+	IoTString(Array<char> *_array) :
+		array(new Array<char>(_array)),
+			hashvalue(hashCharArray(array)),
+			refCount(1) {
+	}
+
+	IoTString(const char *_array) {
+		int32_t len = strlen(_array);
+		array = new Array<char>(len);
+		memcpy(array->internalArray(), _array, len);
+		hashvalue = hashCharArray(array);
+		refCount = 1;
+	}
+
+	IoTString(IoTString *string) :
+	  array(new Array<char>(string->array)),
+			hashvalue(string->hashvalue),
+			refCount(1) {
+	}
+
+	IoTString * acquireRef() {
+		refCount++;
+		return this;
+	}
+
+	void releaseRef() {
+		if ((--refCount) == 0)
+			delete this;
+	}
+	
+	~IoTString() {
+		delete array;
+	}
+
+	void print() {
+		for(uint i=0; i < array->length(); i++)
+			printf("%c", array->get(i));
+	};
+	
+	char get(uint i) {return array->get(i);}
 
 	/**
 	 * Internal method to grab a reference to our char array.  Caller
@@ -34,19 +84,40 @@ public:
 	 * Returns a copy of the underlying char string.
 	 */
 
-	Array<char> *getBytes() { return new Array<Char>(&array); }
+	Array<char> *getBytes() { return new Array<char>(array); }
 
 	/**
 	 * Returns the length in chars of the IoTString.
 	 */
 
+	
+	bool equals(IoTString *str) {
+		uint strlength = str->array->length();
+		uint thislength = array->length();
+		if (strlength != thislength)
+			return false;
+
+		int result = memcmp(str->array->internalArray(), array->internalArray(), strlength);
+		return result == 0;
+	}
+
+	unsigned int hashValue() { return hashvalue;}
 	int length() { return array->length(); }
 	friend IoTString *IoTString_shallow(Array<char> *_array);
 };
 
-IoTString *IoTString_shallow(Array<char> *_array) {
+inline IoTString *IoTString_shallow(Array<char> *_array) {
 	IoTString *str = new IoTString();
 	str->array = _array;
+	str->hashvalue = hashCharArray(_array);
 	return str;
 }
+
+inline unsigned int hashString(IoTString *a) {
+	return a->hashValue();
+}
+
+inline bool StringEquals(IoTString *a, IoTString *b) {
+	return a->equals(b);
+}
 #endif