I have gotten a file, which contains multiple NULL charactes /0
in a line. My goal was to load the file and replace the /0
with something else, but I experience some problems doing that.
Qt stops reading the file, after it get's to the point, where the NULL character appears.
Code:
QTextStream fileContent;
QFile file(pendingFile);
if (file.open(QIODevice::ReadOnly | QIODevice::Text))
{
fileContent.append(file.readAll());
}
File:
Text
Text
Text /x00/x00/x00/x00/x00/x00/x00
More Text
I am currently using Qt 5.9.1 and develop with VS2017.
Read the file with as QDataStream
QFile file("raw.dat");
file.open(QIODevice::ReadOnly);
QDataStream fileStream(&file);
qint64 fileSize = file.size();
QByteArray data(fileSize, '\0');
fileStream.readRawData(data.data(), fileSize)
In the ByteArray you can replace all \\0 elements.
Update (comments, look at underscore_d 's answer):
data.replace('\0','_');
QString dataString(data);
The problem is not that QFile
stops reading at NUL
(ie '\\0'
, not the NULL
macro), but rather that QTextStream
considers a NUL
to mean end-of-string and thus stops append()
ing after the first NUL
it encounters.
Here is a previous thread on another site discussing something very similar, with a suggested alternative, which boils down to this:
You need to replace the NUL
s before feeding them into the QTextStream
, as it will not pass them through. The suggestion there is to use a QDataStream
. Maybe you don't need a TextStream
or any Stream
at all, and could just read the files into memory as binary and replace the NUL
s with your choice of substitute before writing out again.
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