libgphoto2 photo camera library (libgphoto2) API
2.5.30
gphoto2-endian.h
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/* This file is generated automatically by configure */
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/* It is valid only for the system type i686-w64-mingw32 */
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#ifndef GP_BYTEORDER_H
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#define GP_BYTEORDER_H
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/* Use these as generic byteswapping macros on this little endian system */
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/* on windows we might not have ntohs / ntohl without including winsock.dll,
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* so use generic macros */
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#ifdef __HAVE_NTOHL
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# define swap16(x) htons(x)
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# define swap32(x) htonl(x)
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#else
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# define swap16(x) ((uint16_t)(((x) << 8) | ((uint16_t)(x) >> 8)))
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# define swap32(x) ((uint32_t)((((uint32_t)(x) << 24) & 0xff000000UL) | \
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(((uint32_t)(x) << 8) & 0x00ff0000UL) | \
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(((x) >> 8) & 0x0000ff00UL) | \
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(((x) >> 24) & 0x000000ffUL)))
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#endif
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/* No optimized 64 bit byte swapping macro is available */
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#define swap64(x) ((uint64_t)((((uint64_t)(x) << 56) & 0xff00000000000000ULL) | \
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(((uint64_t)(x) << 40) & 0x00ff000000000000ULL) | \
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(((uint64_t)(x) << 24) & 0x0000ff0000000000ULL) | \
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(((uint64_t)(x) << 8) & 0x000000ff00000000ULL) | \
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(((x) >> 8) & 0x00000000ff000000ULL) | \
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(((x) >> 24) & 0x0000000000ff0000ULL) | \
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(((x) >> 40) & 0x000000000000ff00ULL) | \
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(((x) >> 56) & 0x00000000000000ffULL)))
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/* The byte swapping macros have the form: */
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/* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
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/* le (little-endian), NN is 16 or 32 (number of bits) and a, */
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/* if present, indicates that the endian side is a pointer to an */
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/* array of uint8_t bytes instead of an integer of the specified length. */
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/* h refers to the host's ordering method. */
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/* So, to convert a 32-bit integer stored in a buffer in little-endian */
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/* format into a uint32_t usable on this machine, you could use: */
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/* uint32_t value = le32atoh(&buf[3]); */
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/* To put that value back into the buffer, you could use: */
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/* htole32a(&buf[3], value); */
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/* Define aliases for the standard byte swapping macros */
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/* Arguments to these macros must be properly aligned on natural word */
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/* boundaries in order to work properly on all architectures */
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#ifndef htobe16
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# ifdef __HAVE_NTOHL
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# define htobe16(x) htons(x)
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# else
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# ifdef WORDS_BIGENDIAN
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# define htobe16(x) (x)
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# else
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# define htobe16(x) swap16(x)
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# endif
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# endif
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#endif
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#ifndef htobe32
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# ifdef __HAVE_NTOHL
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# define htobe32(x) htonl(x)
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# else
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# ifdef WORDS_BIGENDIAN
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# define htobe32(x) (x)
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# else
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# define htobe32(x) swap32(x)
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# endif
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# endif
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#endif
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#ifndef be16toh
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# define be16toh(x) htobe16(x)
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#endif
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#ifndef be32toh
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# define be32toh(x) htobe32(x)
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#endif
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#define HTOBE16(x) (x) = htobe16(x)
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#define HTOBE32(x) (x) = htobe32(x)
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#define BE32TOH(x) (x) = be32toh(x)
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#define BE16TOH(x) (x) = be16toh(x)
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/* On little endian machines, these macros are null */
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#ifndef htole16
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# define htole16(x) (x)
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#endif
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#ifndef htole32
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# define htole32(x) (x)
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#endif
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#ifndef htole64
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# define htole64(x) (x)
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#endif
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#ifndef le16toh
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# define le16toh(x) (x)
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#endif
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#ifndef le32toh
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# define le32toh(x) (x)
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#endif
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#ifndef le64toh
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# define le64toh(x) (x)
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#endif
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#define HTOLE16(x) (void) (x)
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#define HTOLE32(x) (void) (x)
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#define HTOLE64(x) (void) (x)
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#define LE16TOH(x) (void) (x)
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#define LE32TOH(x) (void) (x)
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#define LE64TOH(x) (void) (x)
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/* These don't have standard aliases */
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#ifndef htobe64
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# define htobe64(x) swap64(x)
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#endif
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#ifndef be64toh
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# define be64toh(x) swap64(x)
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#endif
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#define HTOBE64(x) (x) = htobe64(x)
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#define BE64TOH(x) (x) = be64toh(x)
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/* Define the C99 standard length-specific integer types */
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#include <stdint.h>
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/* Here are some macros to create integers from a byte array */
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/* These are used to get and put integers from/into a uint8_t array */
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/* with a specific endianness. This is the most portable way to generate */
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/* and read messages to a network or serial device. Each member of a */
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/* packet structure must be handled separately. */
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/* The i386 and compatibles can handle unaligned memory access, */
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/* so use the optimized macros above to do this job */
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#ifndef be16atoh
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# define be16atoh(x) be16toh(*(uint16_t*)(x))
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#endif
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#ifndef be32atoh
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# define be32atoh(x) be32toh(*(uint32_t*)(x))
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#endif
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#ifndef be64atoh
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# define be64atoh(x) be64toh(*(uint64_t*)(x))
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#endif
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#ifndef le16atoh
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# define le16atoh(x) le16toh(*(uint16_t*)(x))
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#endif
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#ifndef le32atoh
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# define le32atoh(x) le32toh(*(uint32_t*)(x))
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#endif
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#ifndef le64atoh
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# define le64atoh(x) le64toh(*(uint64_t*)(x))
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#endif
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#ifndef htob16a
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# define htobe16a(a,x) *(uint16_t*)(a) = htobe16(x)
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#endif
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#ifndef htobe32a
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# define htobe32a(a,x) *(uint32_t*)(a) = htobe32(x)
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#endif
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#ifndef htobe64a
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# define htobe64a(a,x) *(uint64_t*)(a) = htobe64(x)
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#endif
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#ifndef htole16a
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# define htole16a(a,x) *(uint16_t*)(a) = htole16(x)
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#endif
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#ifndef htole32a
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# define htole32a(a,x) *(uint32_t*)(a) = htole32(x)
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#endif
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#ifndef htole64a
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# define htole64a(a,x) *(uint64_t*)(a) = htole64(x)
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#endif
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#endif
/* GP_BYTEORDER_H */
libgphoto2
gphoto2-endian.h
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