clear buffer in c + how to invert something?

[mendhak]

in continuation from previous post..

Is there a function in C to clear a buffer?

anything at all.


2nd question:
a rough idea: how can we invert a bytestream? or a block of data of any size...



basically, the data has to be sent across the network, and the network data structure requires the bytestream be inverted. SO how to go about doin' that?

[amac]

What do you mean clear a buffer?

There is

char szBuffer[32];

memset( szBuffer, 0, sizeof(buffer) / sizeof(char) );

or

char szBuffer[32];

ZeroMemory( szBuffer, sizeof(buffer) / sizeof(char) );

Basically the same thing...


and for your second question take a look at these fuctions: htons(), htonl(), ntohs(), ntohl()... They might help.

[jim mcnamara]

Also you can completely clear the buffer from memory like thisL:

char *buf;
buf = (char*) malloc(10000);
// code here, then nuke the buffer
free(buf);
// or use new and delete (standard C++)which is like malloc and free.

[mendhak]

Thanks. Just what was needed.

[MoMad]

Beware of malloc and free (ie new and delete)..... You CANNOT free a buffer that was not created with malloc (or new). The result could be tragic!!

Regards,
MoMad