1 files changed, 127 insertions, 0 deletions
diff --git a/test.c b/test.c
new file mode 100644
index 0000000..f3e6338
--- /dev/null
+++ b/test.c
@@ -0,0 +1,127 @@
+
+#define __USE_POSIX199309
+
+#include <sys/time.h>
+#include <sys/vfs.h>
+#include <time.h>
+
+#include <unistd.h>
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <string>
+
+#include <scan.h>
+
+using std::string;
+
+#define success 0
+#define TB 1
+
+//***************************************************************************
+// Variable Provider
+//***************************************************************************
+
+class VariableProvider
+{
+   public:
+      
+      VariableProvider() {};
+      virtual ~VariableProvider() {};
+
+      int calcExpression(const char* expression);
+      int calc(const char* op, int left, int right);
+};
+
+//***************************************************************************
+// Calculate Expression
+//   calc expressions like: "2 + 4"
+//***************************************************************************
+
+int VariableProvider::calcExpression(const char* expression)
+{
+   Scan* scan;
+   int result = 0;
+   char op[100]; *op = 0;
+   
+   if (!expression || !*expression)
+      return 0;
+   
+   scan = new Scan(expression, no);
+
+   // left expression
+
+   if (scan->eat(yes) != success || !scan->isNum())
+   {
+      delete scan;
+      return result;
+   }
+
+   result = scan->lastInt();
+
+   while (scan->eat() == success && scan->isOperator())
+   {
+      strcpy(op, scan->lastIdent());
+      
+      if (scan->eat(yes) != success || !scan->isNum())
+      {
+         delete scan;
+         return result;
+      }
+
+      result = calc(op, result, scan->lastInt());
+   }
+
+   delete scan;
+
+   return result;
+}
+
+int VariableProvider::calc(const char* op, int left, int right)
+{
+   int result = left;
+
+   if (*op == '+')
+      result += right;
+   else if (*op == '-')
+      result -= right;
+   else if (*op == '*')
+      result *= right;
+   else if (*op == ':')
+      result /= right;
+   
+   return result;
+}
+
+//***************************************************************************
+// tescht
+//***************************************************************************
+
+#include <cstdlib>
+#include <iostream>
+
+int main(int argc, char** argv)
+{
+   int res = 0;
+   VariableProvider v;
+
+   // res = v.calcExpression(argv[1]);
+   // printf("result = %d\n", res);
+
+   int x = 250;
+   int width = 400;
+   int dspWidth = 1360;
+   int themeWidth = 1600;
+
+   double xScale = (double)dspWidth / (double)themeWidth;
+
+   int xDsp = x * xScale;
+   int widthDsp = width * xScale;
+
+   printf("%d / %d = %.2f \n", dspWidth, themeWidth, xScale);
+   printf("%d / %.2f = %d \n", width, xScale, widthDsp);
+
+   return 0;
+}