utility.h File Reference

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Functions
void	checkerr (int Result, const char *ErrorOut)
	Checks if Result is < 0 then printout the ErrorOut and exits with code 0.
uint32_t	snf_bytes_to_uint32 (const char *bytes, int nBytes)
	Turns a sequence of bytes into a uint32 (Following big-endian)
char *	snf_strlen_to_bytes (const char *Str, int nBytes)
	Turns a string's length into a sequence of bytes (Following big-endian)
char *	snf_uint32_to_bytes (uint32_t i, int nBytes)
	Turns a uint32 into a sequence of bytes (Following big-endian)
int	snf_setnonblocking (int _sock)
	Sets a socket as non blocking.

Function Documentation

checkerr()

void checkerr ( int Result, const char * ErrorOut )

extern

Checks if Result is < 0 then printout the ErrorOut and exits with code 0.

Parameters

Result	Input to be checked if < 0
ErrorOut	Error Message content

snf_bytes_to_uint32()

uint32_t snf_bytes_to_uint32 ( const char * bytes, int nBytes )

extern

Turns a sequence of bytes into a uint32 (Following big-endian)

Parameters

bytes	Bytes sequence
nBytes	Bytes sequence's length

Returns

bytes's value in uint32_t On Sucess || 0

snf_strlen_to_bytes()

char * snf_strlen_to_bytes ( const char * Str, int nBytes )

extern

Turns a string's length into a sequence of bytes (Following big-endian)

Parameters

Str	String whose length would be formatted into Bytes sequence
nBytes	Bytes sequence's length

Returns

Byte sequence On Success | NULL On fail { Shall fail if Str is NULL || nBytes is a negative number || Str doesn't finish with a null character || an Error occured during allocation }

snf_uint32_to_bytes()

char * snf_uint32_to_bytes ( uint32_t i, int nBytes )

extern

Turns a uint32 into a sequence of bytes (Following big-endian)

Parameters

i	uint32_t that would be formatted into Bytes sequence
nBytes	Bytes sequence's length

Returns

Byte sequence On Success | NULL On fail { Shall fail if nBytes is a negative number || Str doesn't finish with a null character || an Error occured during allocation }

snf_setnonblocking()

int snf_setnonblocking ( int _sock )

extern

Sets a socket as non blocking.

Parameters

_sock

Socket to be operated on

Returns

See fcntl(..)