Hello everyone,

I have a piece of code that I need some help with. I'm actually suspecting this is a Lite-C bug, but I'm posting here first to be sure.

The code crashes at a certain point. If I debug the code, it seems the code magically jumps to a totaly unrelated function. No function call, nothing. It just jumps to the middle of some other function.

When I remove the do..while loop in this function, the code works fine.

Try for yourself, please. Just copy this in a new file and run. The debugger will be activated right away. Then it will do 20 str_cpy's in a loop, and suddenly jump to the other function.

The code may be a bit large, but you don't have to read or understand it. Just confirm that it does not follow the normal path of execution.
Code:

---

#include <acknex.h>

#define NUM_LINES_IN_CONSOLE 20


FONT* arialFont = "Arial#16";

int numLinesUsed = 0;

TEXT* console = 
{
   layer = 1;
   pos_x = 10;
   pos_y = 10;
   font = arialFont;
   strings = 20;//NUM_LINES_IN_CONSOLE;  // Syntax error: Number syntax...??
}

/*
- Name: initConsole
- Desc: initializes the console. Right now, it just makes it visible.
- Params: -
*/
void initConsole()
{
   console->flags |= VISIBLE;
   if(screen_color.red == 0) screen_color.red = 1;
}

/*
- Name: consoleScrollMessage
- Desc: prints a new message in the console. If the console is full, older messages will
be scrolled up.
- Params: STRING* message - the message to be printed
*/
void consoleScrollMessage(STRING* message)
{
   // Check if the console is full:
   if(numLinesUsed >= NUM_LINES_IN_CONSOLE)
   {
      // It is full, move older messages up 1 string:
      int i = 0;
      for(i = 0; i + 1 < NUM_LINES_IN_CONSOLE; i++)
      {
         // Copy next string to current string:
         str_cpy((console.pstring)[i], (console.pstring)[i + 1]);
      }
   }
   else
   {
      // The console wasn't full so increment numLinesUsed:
      numLinesUsed++;
   }
   
   // Finally, print the message (prepended with "> "):
   str_cpy((console.pstring)[numLinesUsed - 1], "> ");
   str_cat((console.pstring)[numLinesUsed - 1], message);
}

void consoleInkey(STRING* str)
{
   consoleScrollMessage("");
   str_cpy((console.pstring)[numLinesUsed - 1], "                                                  ");
   
   // COMMENT THIS DO WHILE LOOP OUT AND IT WILL WORK:
   do {
      inkey((console.pstring)[numLinesUsed - 1]);
   }
   while(result != 13);
   str_cpy(str, (console.pstring)[numLinesUsed - 1]);
}
#define CONSOLE_INKEY(str) consoleInkey(str); wait_for(consoleInkey)

/*
- Name: consoleClear
- Desc: clears all lines in the console.
- Params: -
*/
void consoleClear()
{
   int i;
   for(i = 0; i < NUM_LINES_IN_CONSOLE; i++)
   {
      str_cpy((console.pstring)[i], "");
   }
}

void main()
{
   // Print numbers 0 - 20 in the console:
   initConsole();
   wait(1);
   
   var i = 0;  
   STRING* strtmp = str_create("   ");
   for(i = 0; i < 20; i++)
   {
      consoleScrollMessage(str_for_num(strtmp, i));
   }
   
   // Debugging starts here:
   i++;//!
   consoleScrollMessage(str_for_num(strtmp, i)); 
}

---

This is interesting, I also had a crash with a do while loop and I now believe that this is a bug in the compiler. Do while lets a previous loop crash. This is the proof:

Code:

---

 
int result = 0;

void test1()
{
   int i;
   for(i = 0; i < 10; i++)
   {
      result = 1;
   }      
}

void test2()
{
   
   do {
      result = 13;
   } while (result != 13);
}

void main()
{
   test1();
}
 

---

This simple program crashes all the time but works when I replace do..while by while {..}. I believe the previous for loop is somehow trashed by the do while loop. I will report this as a bug.

Thanks for looking into this. Let's hope it will be resolved soon..