Allow advanced CSV formating in CRS files

src/common/csv.cpp

@@ -0,0 +1,69 @@
+#include <QByteArrayList>
+#include "csv.h"
+
+/*
+RFC 4180 parser with the following enchancements:
+ - allows an arbitrary delimiter
+ - allows LF line ends in addition to CRLF line ends
+*/
+
+bool CSV::readEntry(QByteArrayList &list)
+{
+	int state = 0;
+	char c;
+	QByteArray field;
+
+	list.clear();
+
+	while (_device->getChar(&c)) {
+		switch (state) {
+			case 0:
+				if (c == '\r')
+					state = 3;
+				else if (c == '\n') {
+					list.append(field);
+					_line++;
+					return true;
+				} else if (c == _delimiter) {
+					list.append(field);
+					field.clear();
+				} else if (c == '"') {
+					if (!field.isEmpty())
+						return false;
+					state = 1;
+				} else
+					field.append(c);
+				break;
+			case 1:
+				if (c == '"')
+					state = 2;
+				else {
+					field.append(c);
+					if (c == '\n')
+						_line++;
+				}
+				break;
+			case 2:
+				if (c == '"') {
+					field.append('"');
+					state = 1;
+				} else if (c == _delimiter || c == '\r' || c == '\n') {
+					_device->ungetChar(c);
+					state = 0;
+				} else
+					return false;
+				break;
+			case 3:
+				if (c == '\n') {
+					_device->ungetChar(c);
+					state = 0;
+				} else
+					return false;
+				break;
+		}
+	}
+
+	list.append(field);
+
+	return (_device->atEnd() && (state == 0 || state == 2));
+}

src/common/csv.h

@@ -0,0 +1,22 @@
+#ifndef CSV_H
+#define CSV_H
+
+#include <QIODevice>
+
+class CSV
+{
+public:
+	CSV(QIODevice *device, char delimiter = ',')
+	  : _device(device), _delimiter(delimiter), _line(1) {}
+
+	bool readEntry(QByteArrayList &list);
+	bool atEnd() const {return _device->atEnd();}
+	int line() const {return _line;}
+
+private:
+	QIODevice *_device;
+	char _delimiter;
+	int _line;
+};
+
+#endif // CSV_H