regular expressions pure c

//operation '*' for regular expression
int RegularExprAsterisk(char* mask, char* remainder)
{
    if (*mask == '\0' || ApplyRegularExpr((mask + 1), remainder))
        return 1;
    else if (*remainder != '\0')
        return RegularExprAsterisk(mask, (remainder + 1));
}

//check if <inspected> suits the <mask>
int ApplyRegularExpr(char* mask, char* inspected)
{
    int i = 0, curInspectedIndex = 0;
    for (; *(mask + i) != '\0'; i++){
        switch (*(mask + i))
        {
        case '*':
            if (RegularExprAsterisk(mask+i, inspected+curInspectedIndex))
                return 1;
            else
                return 0;
            break;
        case '?':
            if (*(inspected+curInspectedIndex) == '\0')
                return 0;
            else
                curInspectedIndex++;
            break;
        default:
            if (*(inspected+ curInspectedIndex)!='\0' &&
                *(inspected + curInspectedIndex) == *(mask+i))
                curInspectedIndex++;
            else
                return 0;
            break;
        }
    }
    return (*(inspected + curInspectedIndex) == '\0');
}