Merge pull request #672 from peace-maker/null_natives_fixed

Add natives to check for NULL_VECTOR and NULL_STRING

plugins/include/core.inc

@@ -143,6 +143,22 @@ struct SharedPlugin
 public float NULL_VECTOR[3];		/**< Pass this into certain functions to act as a C++ NULL */
 public const char NULL_STRING[1];	/**< pass this into certain functions to act as a C++ NULL */
 
+/**
+ * Check if the given vector is the NULL_VECTOR.
+ *
+ * @param vec     The vector to test.
+ * @return        True if NULL_VECTOR, false otherwise.
+ */
+native bool IsNullVector(const float vec[3]);
+
+/**
+ * Check if the given string is the NULL_STRING.
+ *
+ * @param str     The string to test.
+ * @return        True if NULL_STRING, false otherwise.
+ */
+native bool IsNullString(const char[] str);
+
 /**
  * Horrible compatibility shim.
  */

plugins/include/functions.inc

@@ -290,6 +290,16 @@ native void Call_PushArray(const any[] value, int size);
  */
 native void Call_PushArrayEx(any[] value, int size, int cpflags);
 
+/**
+ * Pushes the NULL_VECTOR onto the current call.
+ * @see IsNullVector
+ *
+ * @note Cannot be used before a call has been started.
+ *
+ * @error					Called before a call has been started.
+ */
+native void Call_PushNullVector();
+
 /**
  * Pushes a string onto the current call.
  *
@@ -317,6 +327,16 @@ native void Call_PushString(const char[] value);
  */
 native void Call_PushStringEx(char[] value, int length, int szflags, int cpflags);
 
+/**
+ * Pushes the NULL_STRING onto the current call.
+ * @see IsNullString
+ *
+ * @note Cannot be used before a call has been started.
+ *
+ * @error					Called before a call has been started.
+ */
+native void Call_PushNullString();
+
 /**
  * Completes a call to a function or forward's call list.
  *
@@ -465,6 +485,22 @@ native int GetNativeArray(int param, any[] local, int size);
  */
 native int SetNativeArray(int param, const any[] local, int size);
 
+/**
+ * Check if the native parameter is the NULL_VECTOR.
+ *
+ * @param param		Parameter number, starting from 1.
+ * @return        True if NULL_VECTOR, false otherwise.
+ */
+native bool IsNativeParamNullVector(int param);
+
+/**
+ * Check if the native parameter is the NULL_STRING.
+ *
+ * @param param		Parameter number, starting from 1.
+ * @return        True if NULL_STRING, false otherwise.
+ */
+native bool IsNativeParamNullString(int param);
+
 /**
  * Formats a string using parameters from a native.
  *