Ascii control characters

[priceey]

Hello again

I am writing an application that is converting some code from char to ascii to hex as so..

QString string = (compressed_string2.c_str());
QString res = string.toAscii().toHex();
qDebug() << res;

QString string = (compressed_string2.c_str());
QString res = string.toAscii().toHex();
qDebug() << res;

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Now my problem is that sometimes I get NULL characters in the code, and therefore I do not parse the rest of the text. for example, my output should be

9c00f57b74

9c00f57b74

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instead I get

9c

9c

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I am pretty bad with QT. From my investigation so far, the best I can deduce is to use codecForCStrings but for the life of me I can't work it out.

Anyone have any ideas how I can convert the ascii control characters?

thanks

Priceey

[aamer4yu]

What if you try
QString res = string.toUtf8().toHex();

Does it help ?

[priceey]

Thanks for the quick reply, but no that doesn't work.

it alters the output to something totally different to what I am expecting

[aamer4yu]

What format is your input ?
and also what data type is compressed_string2 ? c_str() doesnt seem to be Qt function

[priceey]

My input is in a standard string format:

std::string compressed_string2;

std::string compressed_string2;

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c_str converts a regular string to a QString.

[^NyAw^]

Hi,

Hi,

QString::QString ( const QByteArray & ba )

Constructs a string initialized with the byte array ba. The given byte array is converted to Unicode using fromAscii(). Stops copying at the first 0 character, otherwise copies the entire byte array.


So

QString res = string.toAscii().toHex();

QString res = string.toAscii().toHex();

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stops at first '0' character

[priceey]

thanks for the input.

That makes sense.

but if that is the case, then if I add

#define QT_NO_CAST_FROM_ASCII

should add the complete line to the string?

is that true?

it gives the same result if I try it.

[^NyAw^]

Hi,

I think that you have to add "48" to each char to obtain the desired character. Take a look at ASCII table where you can see that character "0" is 48 decimal. So this is basically a LUT.
Try it and tell if it helps you.

[priceey]

thanks for all of your help

here is how I fixed it:

QString compressedString1 = QString::fromStdString(compressed_string1);
QString compressedString1Q = compressedString1.toAscii().toHex();

QString compressedString1 = QString::fromStdString(compressed_string1);
QString compressedString1Q = compressedString1.toAscii().toHex();

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this seemed to fix the issue.