Qt Transition – Strings (File Input)

There was an issue in the way the test files were being read.  When the test code was modified to use Qt, the QFile class was used to read the file, where the function used to read a line is actually inherited from the QIODevice class, which QFile is based on.  This function returns the line into a QByteArray, which was easily converted to a character array currently used by the Parser.

However, the Parser is being converted to use the QString class.   The QString class actually contains QChar characters, which supports 16-bit Unicode.  Reading the file as QByteArray would need to be converted to a QString and would not support Unicode text files.  After doing some research, it was found that files can be read as Unicode text using the QTextStream class (into a QString).

Therefore, the file reading code was modified to use a QTextStream (where a pointer to the QFile instance is given in the constructor).  This will also be used for the standard (console) input for the interactive test modes.  The file is opened the same way, but the at end of file check and read line routines from QTextStream are used instead.  This read line routine also strips the line separator from the line (ether newline on Linux or CRLF on Windows).

Temporarily, the QString line is converted to a QByteArray, a null character is added to the end and then converted to character array (constant character pointer) to pass to the Parser.  So that a type cast to a char * was not needed, the argument and variables in the Parser were changed to const char *, which is fine since the Parser does not modify the input line.

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