Commit 85059c29 authored by Ondřej Surý's avatar Ondřej Surý Committed by Michał Kępień

Add fallback definitions to <isc/endian.h>

Since the hto[bl]e{16,32,64}() and [bl]e{16,32,64}toh() conversion
functions are nonstandard, add fallback definitions of these functions
to <isc/endian.h>, so that their unavailability does not prevent
compilation from succeeding.
parent 7ab1fb2a
......@@ -85,6 +85,90 @@
#else
#error Platform not supported
#endif /* Specific platform support */
#endif
/*
* Fallback definitions.
*/
#include <inttypes.h>
#ifndef bswap_16
# define bswap_16(x) \
((uint16_t)((((uint16_t) (x) & 0xff00) >> 8) | \
(((uint16_t) (x) & 0x00ff) << 8)))
#endif /* !bswap_16 */
#ifndef bswap_32
# define bswap_32(x) \
((uint32_t)((((uint32_t) (x) & 0xff000000) >> 24) | \
(((uint32_t) (x) & 0x00ff0000) >> 8) | \
(((uint32_t) (x) & 0x0000ff00) << 8) | \
(((uint32_t) (x) & 0x000000ff) << 24)))
#endif /* !bswap_32 */
#ifndef bswap_64
# define bswap_64(x) \
((uint64_t)((((uint64_t) (x) & 0xff00000000000000ULL) >> 56) | \
(((uint64_t) (x) & 0x00ff000000000000ULL) >> 40) | \
(((uint64_t) (x) & 0x0000ff0000000000ULL) >> 24) | \
(((uint64_t) (x) & 0x000000ff00000000ULL) >> 8) | \
(((uint64_t) (x) & 0x00000000ff000000ULL) << 8) | \
(((uint64_t) (x) & 0x0000000000ff0000ULL) << 24) | \
(((uint64_t) (x) & 0x000000000000ff00ULL) << 40) | \
(((uint64_t) (x) & 0x00000000000000ffULL) << 56)))
#endif /* !bswap_64 */
#ifndef htobe16
# if WORDS_BIGENDIAN
# define htobe16(x) (x)
# define htole16(x) bswap_16(x)
# define be16toh(x) (x)
# define le16toh(x) bswap_16(x)
# else /* WORDS_BIGENDIAN */
# define htobe16(x) bswap_16(x)
# define htole16(x) (x)
# define be16toh(x) bswap_16(x)
# define le16toh(x) (x)
# endif /* WORDS_BIGENDIAN */
#endif /* !htobe16 */
#ifndef htobe32
# if WORDS_BIGENDIAN
# define htobe32(x) (x)
# define htole32(x) bswap_32(x)
# define be32toh(x) (x)
# define le32toh(x) bswap_32(x)
# else /* WORDS_BIGENDIAN */
# define htobe32(x) bswap_32(x)
# define htole32(x) (x)
# define be32toh(x) bswap_32(x)
# define le32toh(x) (x)
# endif /* WORDS_BIGENDIAN */
#endif /* !htobe32 */
#ifndef htobe64
# if WORDS_BIGENDIAN
# define htobe64(x) (x)
# define htole64(x) bswap_64(x)
# define be64toh(x) (x)
# define le64toh(x) bswap_64(x)
#else /* WORDS_BIGENDIAN */
# define htobe64(x) bswap_64(x)
# define htole64(x) (x)
# define be64toh(x) bswap_64(x)
# define le64toh(x) (x)
# endif /* WORDS_BIGENDIAN */
#endif /* !htobe64 */
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