void* allocPage()
{
void* res;
if (pool == NULL)
{
initPages();
}
res = next_free_page;
if (res == NULL)
{
error("error: all pages already allocated", "");
}
next_free_page = *((void**)next_free_page);
assert(res != NULL);
return res;
}
void Global::initDatabase(QString filename)
{
GASSERT(_db == NULL, "Cannot initialize database twice");
QFile fd (filename);
if (!fd.open(QIODevice::ReadOnly))
GEXITDIALOG("Could not open project file for reading " + filename);
QTextStream file (&fd);
// The first five lines contain the following information
// VERSION=%s
// IMAGE_PATH=%s
// QUESTIONS_PER_STUDENT=%d
// PAGES_PER_STUDENT=%d
// TOTAL_STUDENTS=%d
// SAVE_DATE_TIME=%s
// NUM_IMAGES=%d
struct _keyvalue { QString key; QString string; size_t number; };
_keyvalue intro[7];
QString header_names[7] = { "VERSION", "IMAGE_PATH", "QUESTIONS_PER_STUDENT", "PAGES_PER_STUDENT", "TOTAL_STUDENTS", "SAVE_DATE_TIME", "NUM_IMAGES" };
bool expect_numbers[7] = { false, false, true, true, true, false, true };
for (size_t i = 0; i < 7; i++)
{
if (file.atEnd())
GEXITDIALOG(QString("Encountered end of file reading line %1").arg(i));
QString in = file.readLine();
QStringList fields = in.split("=");
if (fields.size() != 2)
GEXITDIALOG(QString("Could not find key/value pair separated by = in [%1] reading line %2").arg(in).arg(i));
intro[i].key = fields.at(0);
if (header_names[i] != fields.at(0))
GEXITDIALOG(QString("Line %1 header was not [%2] but found instead [%3]").arg(i).arg(header_names[i]).arg(intro[i].key));
intro[i].string = fields.at(1);
if (fields.at(0).size() == 0)
GEXITDIALOG(QString("Key in [%1] was empty reading line %2").arg(in).arg(i));
if (fields.at(1).size() == 0)
GEXITDIALOG(QString("Value in [%1] was empty reading line %2").arg(in).arg(i));
intro[i].number = -1;
if (expect_numbers[i])
{
bool ok;
int num = fields.at(1).toInt(&ok);
if (!ok)
GEXITDIALOG(QString("Value [%1] in [%2] was not an integer").arg(fields.at(1)).arg(in));
if (num <= 0)
GEXITDIALOG(QString("Value [%1] in [%2] was not a positive integer").arg(fields.at(1)).arg(in));
intro[i].number = num;
}
if (expect_numbers[i])
GDEBUG ("Parsed key [%s] = number [%zu]", qPrintable(intro[i].key), intro[i].number);
else
GDEBUG ("Parsed key [%s] = string [%s]", qPrintable(intro[i].key), qPrintable(intro[i].string));
}
QString version = intro[0].string;
QString image_path = intro[1].string;
size_t numQuestions = intro[2].number;
size_t numPagesPerStudent = intro[3].number;
size_t numStudents = intro[4].number;
QString unused_date_time = intro[5].string;
size_t numImages = intro[6].number;
// Initialize the database since we know all the dimensions now
initDatabase(numStudents, numQuestions, numPagesPerStudent);
// Check the version is what we are expecting
if (version != DB_VERSION)
GEXITDIALOG(QString("Found version [%1] when only version [%2] is supported").arg(version).arg(DB_VERSION));
// Image paths should always be . right now, nothing else is supported
if (image_path != ".")
GEXITDIALOG("Non-empty path found for image loading");
int slash = filename.lastIndexOf("/");
if (slash < 0)
GEXITDIALOG("Could not find ending slash in file name");
QString full_image_path = filename.left(slash);
GDEBUG("Using image path [%s] from input file [%s]", qPrintable(full_image_path), qPrintable(filename));
initPages(full_image_path);
// Check that the number of images loaded matches what we are expecting
GDEBUG ("Loaded in %zu images from [%s], input file says %zu images", getPages()->size(), qPrintable(image_path), numImages);
if (getPages()->size() != numImages)
GEXITDIALOG(QString("Found different number of images than was used for the save"));
// Now populate the database. Each entry is of the following form:
// IDNUM,STUDENTID,STUDENTNAME,TOTAL,Q0,Q1,..,QN,Feed0,Feed1,..,FeedN
// All fields will contain something except for Feed0..FeedN
for (int student = -2; student < (int)numStudents; student++)
{
if (file.atEnd())
GEXITDIALOG(QString("Encountered end of file reading student %1 of %2").arg(student+1).arg(numStudents));
QString in = file.readLine();
QStringList fields = in.split("\t");
if (fields.size() != (2*(int)numQuestions + 4))
GEXITDIALOG(QString("Found only %1 columns in [%2] for student %3 of %4 when expected 2x%5+4 columns").arg(fields.size()).arg(in).arg(student+1).arg(numStudents).arg(numQuestions));
for (size_t col = 4; col < numQuestions+4; col++) // Do not search student id/name, or any feedback, since these can be empty
if (fields.at(col) == "")
GEXITDIALOG(QString("Found empty column %1 for student %3 of %4").arg(col+1).arg(student+1).arg(numStudents));
bool ok;
{
int num = fields.at(0).toInt(&ok);
if ((!ok) || (num != student))
GEXITDIALOG(QString("Expected row number %1 but found [%2] instead for student %3 of %4").arg(student).arg(fields.at(0)).arg(student+1).arg(numStudents));
}
if (student == -2)
{
if ((fields.at(1) != "PAGE") && (fields.at(2) != "PAGE"))
GEXITDIALOG(QString("Expected PAGE headers for first row of data, but found [%1] [%2] instead").arg(fields.at(1).arg(fields.at(2))));
for (size_t q = 0; q < numQuestions; q++)
{
int page = fields.at(q+4).toInt(&ok);
if ((!ok) || (page < -1))
GEXITDIALOG(QString("Page value [%1] for question %2 was not valid for maximum values").arg(fields.at(q+4)).arg(q+1));
Global::db()->setQuestionPage(q, page, false);
}
int total = fields.at(3).toInt(&ok);
if ((!ok) || (total != -1))
GEXITDIALOG(QString("Page total in file [%1] was not -1").arg(fields.at(3)));
}
else if (student == -1)
{
if ((fields.at(1) != "MAX") && (fields.at(2) != "MAX"))
GEXITDIALOG(QString("Expected MAX headers for first row of data, but found [%1] [%2] instead").arg(fields.at(1).arg(fields.at(2))));
for (size_t q = 0; q < numQuestions; q++)
{
int score = fields.at(q+4).toInt(&ok);
if ((!ok) || (score < -1))
GEXITDIALOG(QString("Score value [%1] for question %2 was not valid for maximum values").arg(fields.at(q+4)).arg(q+1));
Global::db()->setQuestionMaximum(q, score, false);
}
int total = fields.at(3).toInt(&ok);
if ((!ok) || (total != Global::db()->getTotalMaximum()))
GEXITDIALOG(QString("Maximum total in file [%1] did not match calculated maximum total %2").arg(fields.at(3)).arg(Global::db()->getTotalMaximum()));
}
else
{
Student &entry = Global::db()->getStudent(student);
entry.setStudentId(fields.at(1), false);
entry.setStudentName(fields.at(2), false);
for (size_t q = 0; q < numQuestions; q++)
{
int score = fields.at(q+4).toInt(&ok);
if ((!ok) || (score < -1) || (score > Global::db()->getQuestionMaximum(q)))
GEXITDIALOG(QString("Score value [%1] for question %2 was not valid student %3 of %4").arg(fields.at(q+4)).arg(q+1).arg(student+1).arg(numStudents));
entry.setGrade(q, score, false);
}
for (size_t q = 0; q < numQuestions; q++)
entry.setFeedback(q, fields.at(q+4+numQuestions), false);
int total = fields.at(3).toInt(&ok);
if ((!ok) || (total != entry.getTotal()))
GEXITDIALOG(QString("Total in file [%1] did not match calculated total %2").arg(fields.at(3)).arg(entry.getTotal()));
}
}
}
DataStorage::DataStorage(){
initPages();
initBooks();
initAuthors();
}
