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
void	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

#define EVIO_SWAP16

(

x

)

Value:

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

Referenced by swap_int16_t().

#define EVIO_SWAP32

(

x

)

Value:

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

Referenced by evCreateFirstEventBlock(), evPrintBuffer(), evRead(), evReadNoCopy(), evReadRandom(), and swap_int32_t().

#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) )

Referenced by swap_int64_t().

Function Documentation

void 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.

Referenced by evRead(), evReadNoCopy(), and evReadRandom().

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.

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.

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.