Started adding validation layer.

src/log.c

@@ -0,0 +1,37 @@
+#include "log.h"
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+int logLevel = 0;
+
+// TODO
+/*const char* timeStr() {
+    time_t now = time(NULL);
+    struct tm * p = localtime(&now);
+    char buffer[25];
+    strftime(buffer, 25, "%Y-%m-%d %H:%M:%S", p);
+    //buffer[24] = '\0';
+    const char* str = buffer;
+    return str;
+}*/
+
+void vkeSetLogLevel(int level) {
+    logLevel = level;
+}
+
+void vkeLogDebug(const char* message) {
+    if(logLevel == 0) {
+        time_t now;
+        time(&now);
+        printf("%s [DEBUG] %s\n", ctime(&now), message);
+    }
+}
+
+void vkeLogError(const char* message) {
+    if(logLevel > 0) {
+        time_t now;
+        time(&now);
+        printf("%s [ERROR] %s\n", ctime(&now), message);
+    }
+}