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

ctaocrypt/src/logging.c

@@ -0,0 +1,107 @@
+#include "logging.h"
+
+#ifdef HAVE_CONFIG_H
+    #include "config.h"
+#endif
+
+
+/* Set these to default values initially. */
+static CyaSSL_Logging_cb log_function = 0;
+static int loggingEnabled = 0;
+
+
+int CyaSSL_SetLoggingCb(CyaSSL_Logging_cb f)
+{
+	int res = 0;
+
+	if (f)
+		log_function = f;
+	else
+		res = -1;
+
+	return res;
+
+}
+
+
+int CyaSSL_Debugging_ON(void)
+{
+#ifdef DEBUG_CYASSL
+    loggingEnabled = 1;
+    return 0;
+#else
+    return -1;  /* not compiled in */
+#endif
+}
+
+
+void CyaSSL_Debugging_OFF(void)
+{
+    loggingEnabled = 0;
+}
+
+
+#ifdef DEBUG_CYASSL
+
+#include <stdio.h>   /* for default printf stuff */
+
+#ifdef THREADX
+    int dc_log_printf(char*, ...);
+#endif
+
+static void log(const int logLevel, const char *const logMessage)
+{
+	if (log_function)
+		log_function(logLevel, logMessage);
+	else {
+        if (loggingEnabled) {
+#ifdef THREADX
+            dc_log_printf("%s\n", logMessage);
+#elif defined(MICRIUM)
+        #if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED)
+            NetSecure_TraceOut((CPU_CHAR *)logMessage);
+        #endif
+#else
+            fprintf(stderr, "%s\n", logMessage);
+#endif
+		}
+	}
+}
+
+
+void CYASSL_MSG(const char* msg)
+{
+	log(INFO_LOG , msg);
+}
+
+
+void CYASSL_ENTER(const char* msg)
+{
+	if (loggingEnabled) {
+		char buffer[80];
+		sprintf(buffer, "CyaSSL Entering %s", msg);
+		log(ENTER_LOG , buffer);
+	}
+}
+
+
+void CYASSL_LEAVE(const char* msg, int ret)
+{
+	if (loggingEnabled) {
+		char buffer[80];
+		sprintf(buffer, "CyaSSL Leaving %s, return %d", msg, ret);
+		log(LEAVE_LOG , buffer);
+	}
+}
+
+
+void CYASSL_ERROR(int error)
+{
+ 	if (loggingEnabled) {
+		char buffer[80];
+		sprintf(buffer, "CyaSSL error occured, error = %d", error);
+		log(ERROR_LOG , buffer);
+	}
+}
+
+#endif  /* DEBUG_CYASSL */