Jumping Ball

Progress Report 1

Working on the windows version

Just as expected. More weird character string memory problems. It is unfortunate that I have to rewrite the code that manages character input and deletion. After some experimentation, I managed to fix the character input. I deleted most memory allocations and used character arrays instead. The arrays are very easy to use compared to char*.

To fix the bug, I used temporary variables and loops to edit the input content while the user inputs new values. Also, I made sure that the terminating character is properly added to the end of the string. The program does not need 1024 characters. I need to fix this on the next update.

main.c

char *newCharacter = events.text.text;
char cpyTemp[1024];

if (strlen(interiorTextBox.content) == 0)
{
     for (int i = 0; i < strlen(newCharacter); i++)
     {
        interiorTextBox.content[i] = newCharacter[i];
     }
}
else
{
    for (int i = 0; i < strlen(interiorTextBox.content); i++)
    {
        cpyTemp[i] = interiorTextBox.content[i];
    }

    cpyTemp[strlen(interiorTextBox.content)] = newCharacter[0];
    cpyTemp[strlen(interiorTextBox.content) + 1] = '\0';

    for (int k = 0; k < strlen(cpyTemp); k++)
    {
        interiorTextBox.content[k] = cpyTemp[k];
    }

    interiorTextBox.content[strlen(cpyTemp)] = '\0';
}        

There was a need to edit the textbox.c source file too. The cursor of the text box appears at the end of the input. The temp variable is used to display the user’s input on the screen.

textbox.c

char temp[5];

if (strlen(interiorTextBox.content) > 0)
{
    for (int i = 0; i < strlen(interiorTextBox.content); i++)
    {
        temp[i] = interiorTextBox.content[i];
    }

    temp[strlen(interiorTextBox.content)] = 'I';
    temp[strlen(interiorTextBox.content) + 1] = '\0';
}
else
{
    temp[0] = 'I';
    temp[1] = '\0';
}        

I still need to fix the logic for the character deletion. Avoiding memory allocation is a good way to increase performance and headaches compared to using char*, calloc, and malloc. I should move the new code to the main working branch when it’s finished.

Original Post

https://therunner.digital/jumping-ball/devlog/2024/07/23/jumpingball-progress-1.html