Closes #2071, implementing glfwGetErrorDescription

include/GLFW/glfw3.h

@@ -2364,6 +2364,29 @@ GLFWAPI const char* glfwGetVersionString(void);
  */
 GLFWAPI int glfwGetError(const char** description);
 
+/*! @brief Returns the description for a specific error code.
+ *
+ *  @param[in] code The error code whose description is requested.
+ *  @return The error description pointer belonging to specified error code, or NULL if error code is not found.
+ *  
+ *  @errors None.
+ *
+ *  @pointer_lifetime The returned string is allocated and freed by GLFW.  You
+ *  should not free it yourself.  It is guaranteed to be valid only until the library is terminated.
+ *
+ *  @remark This function may be called before @ref glfwInit.
+ *
+ *  @thread_safety This function may be called from any thread.
+ *
+ *  @sa @ref error_handling
+ *  @sa @ref glfwGetError
+ *
+ *  @since Added in version 3.3.7.
+ *
+ *  @ingroup init
+ */
+GLFWAPI const char* glfwGetErrorDescription(int code);
+
 /*! @brief Sets the error callback.
  *
  *  This function sets the error callback, which is called with an error code

src/init.c

@@ -484,6 +484,23 @@ GLFWAPI int glfwGetError(const char** description)
     return code;
 }
 
+GLFWAPI const char* glfwGetErrorDescription(int code)
+{
+    _GLFWerror* error;
+        
+    error = _glfw.errorListHead;
+    
+    while (error)
+    {
+        if (error->code == code)
+            return error->description;
+            
+        error = error->next;
+    }
+    
+    return NULL;
+}
+
 GLFWAPI GLFWerrorfun glfwSetErrorCallback(GLFWerrorfun cbfun)
 {
     _GLFW_SWAP(GLFWerrorfun, _glfwErrorCallback, cbfun);