Function checkExt

src/core/sd_functions.cpp:491–509

** Function name: checkExt ** Description: check file extension ***************************************************************************************/

** Description:   check file extension
***************************************************************************************/
bool checkExt(String ext, String pattern) {
    ext.toUpperCase();
    pattern.toUpperCase();
    if (ext == pattern) return true;

    // If the pattern is a list of extensions (e.g., "TXT|JPG|PNG"), split and check
    int start = 0;
    int end = pattern.indexOf('|');
    while (end != -1) {
        String currentExt = pattern.substring(start, end);
        if (ext == currentExt) { return true; }
        start = end + 1;
        end = pattern.indexOf('|', start);
    }

    // Check the last extension in the list
    String lastExt = pattern.substring(start);
    return ext == lastExt;
}

/***************************************************************************************
** Function name: readFs