keepassxc/src/core/CsvParser.cpp at develop · sourcecodes2/keepassxc · GitHub

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* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 2 or (at your option)

* version 3 of the License.

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

#include "CsvParser.h"

#include <QObject>

#include <QTextCodec>

#include "core/Tools.h"

CsvParser::CsvParser()

: m_ch(0)

, m_comment('#')

, m_currCol(1)

, m_currRow(1)

, m_isBackslashSyntax(false)

, m_isEof(false)

, m_isFileLoaded(false)

, m_isGood(true)

, m_lastPos(-1)

, m_maxCols(0)

, m_qualifier('"')

, m_separator(',')

, m_statusMsg("")

{

m_csv.setBuffer(&m_array);

m_ts.setDevice(&m_csv);

m_csv.open(QIODevice::ReadOnly);

m_ts.setCodec("UTF-8");

}

CsvParser::~CsvParser()

{

m_csv.close();

}

bool CsvParser::isFileLoaded()

{

return m_isFileLoaded;

}

bool CsvParser::reparse()

{

reset();

return parseFile();

}

bool CsvParser::parse(QFile* device)

{

clear();

if (nullptr == device) {

appendStatusMsg(QObject::tr("NULL device"), true);

return false;

}

if (!readFile(device)) {

return false;

}

return parseFile();

}

bool CsvParser::readFile(QFile* device)

{

if (device->isOpen()) {

device->close();

}

device->open(QIODevice::ReadOnly);

if (!Tools::readAllFromDevice(device, m_array)) {

appendStatusMsg(QObject::tr("error reading from device"), true);

m_isFileLoaded = false;

} else {

device->close();

m_array.replace("\r\n", "\n");

m_array.replace("\r", "\n");

if (0 == m_array.size()) {

appendStatusMsg(QObject::tr("file empty").append("\n"));

}

m_isFileLoaded = true;

}

return m_isFileLoaded;

}

void CsvParser::reset()

{

m_ch = 0;

m_currCol = 1;

m_currRow = 1;

m_isEof = false;

m_isGood = true;

m_lastPos = -1;

m_maxCols = 0;

m_statusMsg = "";

m_ts.seek(0);

m_table.clear();

// the following are users' concern :)

// m_comment = '#';

// m_backslashSyntax = false;

// m_comment = '#';

// m_qualifier = '"';

// m_separator = ',';

}

void CsvParser::clear()

{

reset();

m_isFileLoaded = false;

m_array.clear();

}

bool CsvParser::parseFile()

{

parseRecord();

while (!m_isEof) {

if (!skipEndline()) {

appendStatusMsg(QObject::tr("malformed string"), true);

}

m_currRow++;

m_currCol = 1;

parseRecord();

}

fillColumns();

return m_isGood;

}

void CsvParser::parseRecord()

{

CsvRow row;

if (isComment()) {

skipLine();

return;

}

do {

parseField(row);

getChar(m_ch);

} while (isSeparator(m_ch) && !m_isEof);

if (!m_isEof) {

ungetChar();

}

if (isEmptyRow(row)) {

row.clear();

return;

}

m_table.push_back(row);

if (m_maxCols < row.size()) {

m_maxCols = row.size();

}

m_currCol++;

}

void CsvParser::parseField(CsvRow& row)

{

QString field;

peek(m_ch);

if (!isTerminator(m_ch)) {

if (isQualifier(m_ch)) {

parseQuoted(field);

} else {

parseSimple(field);

}

row.push_back(field);

}

void CsvParser::parseSimple(QString& s)

{

QChar c;

getChar(c);

while ((isText(c)) && (!m_isEof)) {

s.append(c);

getChar(c);

}

if (!m_isEof) {

ungetChar();

}

void CsvParser::parseQuoted(QString& s)

{

// read and discard initial qualifier (e.g. quote)

getChar(m_ch);

parseEscaped(s);

// getChar(m_ch);

if (!isQualifier(m_ch)) {

appendStatusMsg(QObject::tr("missing closing quote"), true);

}

void CsvParser::parseEscaped(QString& s)

{

parseEscapedText(s);

while (processEscapeMark(s, m_ch)) {

parseEscapedText(s);

}

if (!m_isEof) {

ungetChar();

}

void CsvParser::parseEscapedText(QString& s)

{

getChar(m_ch);

while ((!isQualifier(m_ch)) && !m_isEof) {

s.append(m_ch);

getChar(m_ch);

}

bool CsvParser::processEscapeMark(QString& s, QChar c)

{

QChar buf;

peek(buf);

QChar c2;

if (true == m_isBackslashSyntax) {

// escape-character syntax, e.g. \"

if (c != '\\') {

return false;

}

// consume (and append) second qualifier

getChar(c2);

if (m_isEof) {

c2 = '\\';

s.append('\\');

return false;

} else {

s.append(c2);

return true;

}

} else {

// double quote syntax, e.g. ""

if (!isQualifier(c)) {

return false;

}

peek(c2);

if (!m_isEof) { // not EOF, can read one char

if (isQualifier(c2)) {

s.append(c2);

getChar(c2);

return true;

}

return false;

}

void CsvParser::fillColumns()

{

// fill shorter rows with empty placeholder columns

for (int i = 0; i < m_table.size(); ++i) {

int gap = m_maxCols - m_table.at(i).size();

if (gap > 0) {

CsvRow r = m_table.at(i);

for (int j = 0; j < gap; ++j) {

r.append(QString(""));

}

m_table.replace(i, r);

}

void CsvParser::skipLine()

{

m_ts.readLine();

m_ts.seek(m_ts.pos() - 1);

}

bool CsvParser::skipEndline()

{

getChar(m_ch);

return (m_ch == '\n');

}

void CsvParser::getChar(QChar& c)

{

m_isEof = m_ts.atEnd();

if (!m_isEof) {

m_lastPos = m_ts.pos();

m_ts >> c;

}

void CsvParser::ungetChar()

{

if (!m_ts.seek(m_lastPos)) {

qWarning("CSV Parser: unget lower bound exceeded");

m_isGood = false;

}

void CsvParser::peek(QChar& c)

{

getChar(c);

if (!m_isEof) {

ungetChar();

}

bool CsvParser::isQualifier(const QChar& c) const

{

if (true == m_isBackslashSyntax && (c != m_qualifier)) {

return (c == '\\');

} else {

return (c == m_qualifier);

}

bool CsvParser::isComment()

{

bool result = false;

QChar c2;

qint64 pos = m_ts.pos();

do {

getChar(c2);

} while ((isSpace(c2) || isTab(c2)) && (!m_isEof));

if (c2 == m_comment) {

result = true;

}

m_ts.seek(pos);

return result;

}

bool CsvParser::isText(QChar c) const

{

return !((isCRLF(c)) || (isSeparator(c)));

}

bool CsvParser::isEmptyRow(const CsvRow& row) const

{

CsvRow::const_iterator it = row.constBegin();

for (; it != row.constEnd(); ++it) {

if (((*it) != "\n") && ((*it) != "")) {

return false;

}

return true;

}

bool CsvParser::isCRLF(const QChar& c) const

{

return (c == '\n');

}

bool CsvParser::isSpace(const QChar& c) const

{

return (c == ' ');

}

bool CsvParser::isTab(const QChar& c) const

{

return (c == '\t');

}

bool CsvParser::isSeparator(const QChar& c) const

{

return (c == m_separator);

}

bool CsvParser::isTerminator(const QChar& c) const

{

return (isSeparator(c) || (c == '\n') || (c == '\r'));

}

void CsvParser::setBackslashSyntax(bool set)

{

m_isBackslashSyntax = set;

}

void CsvParser::setComment(const QChar& c)

{

m_comment = c.unicode();

}

void CsvParser::setCodec(const QString& s)

{

m_ts.setCodec(QTextCodec::codecForName(s.toLocal8Bit()));

}

void CsvParser::setFieldSeparator(const QChar& c)

{

m_separator = c.unicode();

}

void CsvParser::setTextQualifier(const QChar& c)

{

m_qualifier = c.unicode();

}

int CsvParser::getFileSize() const

{

return m_csv.size();

}

const CsvTable CsvParser::getCsvTable() const

{

return m_table;

}

QString CsvParser::getStatus() const

{

return m_statusMsg;

}

int CsvParser::getCsvCols() const

{

if (!m_table.isEmpty() && !m_table.at(0).isEmpty()) {

return m_table.at(0).size();

} else {

return 0;

}

int CsvParser::getCsvRows() const

{

return m_table.size();

}

void CsvParser::appendStatusMsg(const QString& s, bool isCritical)

{

m_statusMsg += QObject::tr("%1: (row, col) %2,%3").arg(s, m_currRow, m_currCol).append("\n");

m_isGood = !isCritical;

}

keepassxc/src/core/CsvParser.cpp at develop · sourcecodes2/keepassxc · GitHub

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