Added CGI stuff and unixtime function.

Operand.cpp

@@ -3,6 +3,7 @@
 #include <format>
 #include <iostream>
 #include <time.h>
+#include <chrono>
 
 namespace jet {
 
@@ -11,7 +12,7 @@ namespace jet {
       doubleValue = 0;
       
       in.skipWhitespace();
-
+      
       if(in.startsWith("$[") || in.startsWith("#[")) {
 	 string = tag.getVariable(in);
 	 doubleValue = string.asDouble();
@@ -36,7 +37,7 @@ namespace jet {
 	 if(in.ifNext(")")) {
 	    string = parm1.string.substring(parm2.string.asInteger());
 	 } else if(!in.ifNext(","))
-	   throw coreutils::Exception("Expecting , in SUBSTRING expression.");
+	      throw coreutils::Exception("Expecting , in SUBSTRING expression.");
 	 Operand parm3(in, tag);
 	 if(in.ifNext(")")) {
 	    string = parm1.string.substring(parm2.string.asInteger(), parm3.string.asInteger());
@@ -122,6 +123,45 @@ namespace jet {
 	 isNumber = true;
 	 string = std::format("{:.12f}", doubleValue);
 	 string.removeTrailingZeros();
+      } else if(in.ifNextIgnoreCase("ABS")) {
+	 
+      } else if(in.ifNextIgnoreCase("MAX")) {
+	 
+      } else if(in.ifNextIgnoreCase("MIN")) {
+	 
+      } else if(in.ifNextIgnoreCase("POW")) {
+	 
+      } else if(in.ifNextIgnoreCase("SIN")) {
+	 
+      } else if(in.ifNextIgnoreCase("ASIN")) {
+	 
+      } else if(in.ifNextIgnoreCase("COS")) {
+	 
+      } else if(in.ifNextIgnoreCase("ACOS")) {
+	 
+      } else if(in.ifNextIgnoreCase("ATAN")) {
+	 
+      } else if(in.ifNextIgnoreCase("SQRT")) {
+	 
+      } else if(in.ifNextIgnoreCase("TAN")) {
+	 
+      } else if(in.ifNextIgnoreCase("TRUNC")) {
+	 
+      } else if(in.ifNextIgnoreCase("CEIL")) {
+	 
+      } else if(in.ifNextIgnoreCase("FLOOR")) {
+	 
+      } else if(in.ifNextIgnoreCase("UNIXTIME")) {
+	 if(!in.ifNext("("))
+	   throw coreutils::Exception("Expecting ( for UNIXTIME.");
+	 if(in.ifNext(")")) {
+	    auto now = std::chrono::system_clock::now();
+	    auto duration_since_epoch = now.time_since_epoch();
+	    auto seconds_since_epoch = std::chrono::duration_cast<std::chrono::seconds>(duration_since_epoch);
+	    int unixtime = seconds_since_epoch.count();	    
+	    string << unixtime;
+	 } else
+	   throw coreutils::Exception("Expecting ) at end of UNIXTIME.");	 	 	 	 	 	 
       } else if(in.ifNextIgnoreCase("true")) {
 	 boolean = true;
 	 string = "true";
@@ -138,7 +178,7 @@ namespace jet {
 	 isNumber = false;
       } else
 	throw coreutils::Exception("operand is not valid.");
-
+      
       in.skipWhitespace();
       
       if(in.ifNext("!=") || in.ifNext("<>")) {