Function parse_item_from_format_string

Core/SoarKernel/src/trace.cpp:342–642

}

trace_format* parse_item_from_format_string(agent* thisAgent)
{
    trace_format* tf, *pattern;
    char* ch;
    list* attribute_path;
    int n;
    
    if (*format == 0)
    {
        return NIL;
    }
    if (*format == ']')
    {
        return NIL;
    }
    if (*format == '[')
    {
        format_string_error_message = "unexpected '[' character";
        return NIL;
    }
    
    if (*format != '%')
    {
        char buf[MAX_LEXEME_LENGTH + 20];
        
        ch = buf;
        while ((*format != 0) && (*format != '%') &&
                (*format != '[') && (*format != ']'))
        {
            *ch++ = *format++;
        }
        *ch = 0;
        tf = static_cast<trace_format_struct*>(allocate_memory(thisAgent, sizeof(trace_format),
                                               MISCELLANEOUS_MEM_USAGE));
        tf->type = STRING_TFT;
        tf->data.string = make_memory_block_for_string(thisAgent, buf);
        return tf;
    }
    
    /* --- otherwise *format is '%', so parse the escape sequence --- */
    
    if (!strncmp(format, "%v", 2))
    {
        format += 2;
        attribute_path = parse_attribute_path_in_brackets(thisAgent);
        if (format_string_error_message)
        {
            return NIL;
        }
        tf = static_cast<trace_format_struct*>(allocate_memory(thisAgent, sizeof(trace_format),
                                               MISCELLANEOUS_MEM_USAGE));
        tf->type = VALUES_TFT;
        tf->data.attribute_path = attribute_path;
        return tf;
    }
    
    if (!strncmp(format, "%o", 2))
    {