swap routines

These routines handle swapping the endianness (little <-> big) of evio data. More...

Macros
#define	EVIO_SWAP64(x)
#define	EVIO_SWAP32(x)
#define	EVIO_SWAP16(x)

Functions
int	evioswap (uint32_t *buf, int tolocal, uint32_t *dest)
	Routine to swap the endianness of an evio event (bank). More...
uint32_t *	swap_int32_t (uint32_t *data, unsigned int length, uint32_t *dest)
	This routine swaps a buffer of 32 bit integers. More...
uint64_t *	swap_int64_t (uint64_t *data, unsigned int length, uint64_t *dest)
	This routine swaps a buffer of 64 bit integers. More...
uint16_t *	swap_int16_t (uint16_t *data, unsigned int length, uint16_t *dest)
	This routine swaps a buffer of 16 bit integers. More...

Detailed Description

These routines handle swapping the endianness (little <-> big) of evio data.

Macro Definition Documentation

EVIO_SWAP16

#define EVIO_SWAP16

(

x

)

Value:

                         ( (((x) >> 8) & 0x00FF) | \
                         (((x) << 8) & 0xFF00) )

EVIO_SWAP32

#define EVIO_SWAP32

(

x

)

Value:

                         ( (((x) >> 24) & 0x000000FF) | \
                         (((x) >> 8)  & 0x0000FF00) | \
                         (((x) << 8)  & 0x00FF0000) | \
                         (((x) << 24) & 0xFF000000) )

EVIO_SWAP64

#define EVIO_SWAP64

(

x

)

Value:

                         ( (((x) >> 56) & 0x00000000000000FFL) | \
                         (((x) >> 40) & 0x000000000000FF00L) | \
                         (((x) >> 24) & 0x0000000000FF0000L) | \
                         (((x) >> 8)  & 0x00000000FF000000L) | \
                         (((x) << 8)  & 0x000000FF00000000L) | \
                         (((x) << 24) & 0x0000FF0000000000L) | \
                         (((x) << 40) & 0x00FF000000000000L) | \
                         (((x) << 56) & 0xFF00000000000000L) )

Function Documentation

evioswap()

int evioswap	(	uint32_t *	buf,
		int	tolocal,
		uint32_t *	dest
	)

Routine to swap the endianness of an evio event (bank).

Parameters

buf	buffer of evio event data to be swapped
tolocal	if 0 buf contains data of same endian as local host, else buf has data of opposite endian
dest	buffer to place swapped data into. If this is NULL, then dest = buf.

Returns

S_SUCCESS if successful

S_EVFILE_BADFILE format error in array of composite type

S_EVFILE_BADHEADER inconsistent header data (bad length)

swap_int16_t()

uint16_t* swap_int16_t	(	uint16_t *	data,
		unsigned int	length,
		uint16_t *	dest
	)

This routine swaps a buffer of 16 bit integers.

Parameters

data	pointer to data to be swapped
length	number of 16 bit ints to be swapped
dest	pointer to where swapped data is to be copied to. If NULL, the data is swapped in place.

Returns

pointer to beginning of swapped data

References EVIO_SWAP16.

swap_int32_t()

uint32_t* swap_int32_t	(	uint32_t *	data,
		unsigned int	length,
		uint32_t *	dest
	)

This routine swaps a buffer of 32 bit integers.

Parameters

data	pointer to data to be swapped
length	number of 32 bit ints to be swapped
dest	pointer to where swapped data is to be copied to. If NULL, the data is swapped in place.

Returns

pointer to beginning of swapped data

References EVIO_SWAP32.

swap_int64_t()

uint64_t* swap_int64_t	(	uint64_t *	data,
		unsigned int	length,
		uint64_t *	dest
	)

This routine swaps a buffer of 64 bit integers.

Parameters

data	pointer to data to be swapped
length	number of 64 bit ints to be swapped
dest	pointer to where swapped data is to be copied to. If NULL, the data is swapped in place.

Returns

pointer to beginning of swapped data

References EVIO_SWAP64.