take data out of a stream

[frank dot nielsen at rocketmail dot com]

Hi there

I have a std:istrstream full of data and i want to take this data out to a void* . I have to send the data back through jni (java) so i can't use any streams to extract data...

Something like:

std::istrstream os;

.. stuff data is os...

void* dataptr = os.getptr(); ???? HOW TO DO ????
int datalen = is.pcount();

// send back thought jni....
byteArray outdata = env->NewByteArray( datalen );
env->SetByteArrayRegion( outdata, 0, datalen, (jbyte *)(char*)dataptr );


Thanks in advance

 

[Frank Nielsen]

Hi there

I have a std:istrstream full of data and i want to take this data out to
a void* . I have to send the data back through jni (java) so i can't use
any streams to extract data...

Something like:

std::istrstream os;

.. stuff data is os...

void* dataptr = os.getptr(); ???? HOW TO DO ????
int datalen = is.pcount();

// send back thought jni....
byteArray outdata = env->NewByteArray( datalen );
env->SetByteArrayRegion( outdata, 0, datalen, (jbyte *)(char*)dataptr );

Thanks in advance

Found the answer myself, and ofcoz it was too obvious...

void* dataptr = os.str();


But a new problem is raised. The data cannot be contained in a string-stream since it contains '\0' character, actually it is utf8 strings. So is there any binary stream classes i can use instead of istrstream????

 

[David Harmon]

On Tue, 27 Apr 2004 22:32:49 +0200 in comp.lang.c++, "Frank Nielsen"

But a new problem is raised. The data cannot be contained in a string-stream since it contains '\0' character, actually it is utf8 strings. So is there any binary stream classes i can use instead of istrstream????

What is the problem with the '\0' and the stringstream?

 

[John Harrison]

But a new problem is raised. The data cannot be contained in a

string-stream since it contains '\0' character, actually it is utf8 strings.
So is there any binary stream classes i can use instead of istrstream????

Yes istringstream, which is based on a string not on a char*, and string can
contain '\0' chars.

john