if (editor.ui.getLineType == TEXT_EDIT_DECIMAL)
                {
                    // char format_string[8]
                    // char digit[8]
                    // int number_format (could use enum)
                    PT_ASSERT(editor.ui.numLen < 8);
                    // print format string to pad with zeros
                    sprintf(format_string, "%%0%ii", editor.ui.numLen);
                    // clear all digits
                    for (int i = 0; i < editor.ui.numLen; i++) {
                        digit[i] = '0';
                    }
                    for (int i = editor.ui.numLen; i < 8; i++) {
                        digit[i] = 0;
                    }

                    if ((rawKey >= '0') && (rawKey <= '9'))
                    {
                        // read value
                        if (editor.ui.numPtr32) {
                            // int32
                            number = editor.ui.numPtr32[0];
                            number_format = 3;
                        } else if (editor.ui.numPtr16) {
                            // int 16
                            number = editor.ui.numPtr16[0];
                            number_format = 2;
                        }

                        // print value to string
                        sprintf(digit, format_string, number);

                        // overwrite digit with input
                        PT_ASSERT(editor.ui.dstPos < editor.ui.numLen);
                        digit[editor.ui.dstPos] = rawKey;

                        // read digits and output number
                        number = atoi(digit);

                        // write value
                        switch (number_format) {
                            // float
                            case 4: PT_ASSERT(0); break;
                            // int32
                            case 3: editor.ui.numPtr32[0] = number; break;
                            // int16
                            case 2: editor.ui.numPtr16[0] = number; break;
                            // int8
                            case 1: PT_ASSERT(0); break;
                            // invalid
                            case 0: PT_ASSERT(0); break;
                        }

                        textMarkerMoveRight();
                        if (editor.ui.dstPos >= editor.ui.numLen)
                            exitGetTextLine(EDIT_TEXT_UPDATE);
                    }
                }