allow runtime setting of logging function, move to ctaocrypt for use by both, submitted by eof

ctaocrypt/include/logging.h

@@ -0,0 +1,46 @@
+#ifndef CYASSL_LOGGING_H
+#define CYASSL_LOGGING_H
+
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+
+enum  CYA_Log_Levels {
+    ERROR_LOG = 0,
+    INFO_LOG,
+	ENTER_LOG,
+	LEAVE_LOG,
+	OTHER_LOG
+};
+
+typedef void (*CyaSSL_Logging_cb)(const int logLevel,
+                                  const char *const logMessage);
+
+int CyaSSL_SetLoggingCb(CyaSSL_Logging_cb log_function);
+
+
+#ifdef DEBUG_CYASSL
+
+    void CYASSL_ENTER(const char* msg);
+    void CYASSL_LEAVE(const char* msg, int ret);
+
+    void CYASSL_ERROR(int);
+    void CYASSL_MSG(const char* msg);
+
+#else /* DEBUG_CYASSL   */
+
+    #define CYASSL_ENTER(m)
+    #define CYASSL_LEAVE(m, r)
+
+    #define CYASSL_ERROR(e) 
+    #define CYASSL_MSG(m)
+
+#endif /* DEBUG_CYASSL  */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CYASSL_MEMORY_H */