C: POSIX Datatypes

The following are datatypes required by the POSIX specification:

Datatype	Description	Header
int8_t	Signed 8-bit integer (char)	<sys/types.h>
uint8_t	Unsigned 8-bit integer (unsigned char)	<sys/types.h>
int16_t	Signed 16-bit integer (short)	<sys/types.h>
uint16_t	Unsigned 16-bit integer (unsigned short)	<sys/types.h>
int32_t	Signed 32-bit integer (int)	<sys/types.h>
uint32_t	Unsigned 32-bit integer (unsigned int)	<sys/types.h>
sa_family_t	Address family of socket address struct	<sys/types.h>
socklen_t	Length of socket address struct (unint32_t)	<sys/types.h>
in_addr_t	IPv4 address (uint32_t)	<netinet/in.h>
in_port_t	TCP or UDP port (uint16_t)	<netinet/in.h>
u_char	Unsigned char - OBSOLETE
u_short	Unsigned short - OBSOLETE
u_int	Unsigned int - OBSOLETE
u_long	Unsigned long - OBSOLETE
struct timeval	long tv_sec (secs), long tv_usec (microsecs)	<sys/time.h>