[Dev-C++] write and fwrite functions

[Dmitry S. <si...@si...>]

Hello, dev-cpp-users.

I try to save binary data recieved from TCP socket into the file

...

#define DATA_BUFSIZE 4096

long totalRcvd = 0;
long nFileSize = 0;
int bytesRecv = SOCKET_ERROR;
char recvbuf[DATA_BUFSIZE];
int fd = open( "filename", O_CREAT|O_WRONLY );
while( bytesRecv == SOCKET_ERROR || bytesRecv > 0 ) {
   bytesRecv = recv( sock, recvbuf, DATA_BUFSIZE, 0 );
   totalRcvd += bytesRecv;
   nFileSize += write( fd, recvbuf, bytesRecv );
}
close( fd );

totalRcvd and nFileSize are equal
nFileSize value is valid (I sent the same quantity of bytes to socket)

But real file size is bigger as nFileSize
And it is broken :(

When I use fopen, fwrite and fclose functions the result is rhe same

Why?


-- 
Dmitry