Metrologic Optimus R, Programming Manual

Page: 169 / 241

Chapter 3 Terminal Specific Function Library 163
Byte Swapping
htonl
Purpose To convert an unsigned long integer from host byte order to network byte
order.
Syntax unsigned long htonl (unsigned long val);
unsigned long val; /* an unsigned long integer to be converted */
Example (?)
Description This routine converts an unsigned long integer from host byte order to network
byte order.
Return
If successful, it returns the value of conversion.
Otherwise (?)
See Also ntohl
htons
Purpose To convert an unsigned (short) integer from host byte order to network byte
order.
Syntax unsigned htons (unsigned val);
unsigned val; /* an unsigned integer to be converted */
Example struct sockaddr_in name;
s = socket (PF_INET, SOCK_STREAM, TCP);
if (s < 0) {
printf ("SOCKET allocation failed");
.......................
}
memset (&name, 0, sizeof (name));
name.sin_family = AF_INET;
name.sin_port = htons (3000);
Description
This routine converts an unsigned (short) integer from host byte order to
network byte order.
Return If successful, it returns the value of conversion.
Otherwise (?)
See Also ntohs