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Add 16 bit endianness functions

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Daniel Drake 2007-10-12 15:16:51 +01:00 committed by Daniel Drake
parent ec91736ac4
commit e6624fe508
1 changed files with 25 additions and 0 deletions
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25
libfprint/fp_internal.h
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@ -24,6 +24,16 @@
#include <usb.h>
#ifdef __DARWIN_NULL
/* Darwin does endianness slightly differently */
#include <machine/endian.h>
#define __BYTE_ORDER BYTE_ORDER
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __BIG_ENDIAN BIG_ENDIAN
#else /* Linux */
#include <endian.h>
#endif
#include <fprint.h>
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*a))
@ -92,5 +102,20 @@ struct fp_print_data *fpi_print_data_new(struct fp_driver *drv, size_t length);
unsigned char *fpi_print_data_get_buffer(struct fp_print_data *data);
int fpi_print_data_compatible(struct fp_dev *dev, struct fp_print_data *data);
#define bswap16(x) (((x & 0xff) << 8) | (x >> 8))
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_le16(x) (x)
#define le16_to_cpu(x) (x)
#define cpu_to_be16(x) bswap16(x)
#define be16_to_cpu(x) bswap16(x)
#elif __BYTE_ORDER == __BIG_ENDIAN
#define cpu_to_le16(x) bswap16(x)
#define le16_to_cpu(x) bswap16(x)
#define cpu_to_be16(x) (x)
#define be16_to_cpu(x) (x)
#else
#error "Unrecognized endianness"
#endif
#endif