libmtp: /tmp/libmtp-0.0.18/src/gphoto2-endian.h Source File

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# gphoto2-endian.h

    00001 /* This file is generated automatically by configure */
    00002 /* It is valid only for the system type s390x-slackware-linux */
    00003
    00004 #ifndef __BYTEORDER_H
    00005 #define __BYTEORDER_H
    00006
    00007 /* ntohl and relatives live here */
    00008 #include <arpa/inet.h>
    00009
    00010 /* Define generic byte swapping functions */
    00011 #include <byteswap.h>
    00012 #define swap16(x) bswap_16(x)
    00013 #define swap32(x) bswap_32(x)
    00014 #define swap64(x) bswap_64(x)
    00015
    00016 /* The byte swapping macros have the form: */
    00017 /*   EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
    00018 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */
    00019 /* if present, indicates that the endian side is a pointer to an */
    00020 /* array of uint8_t bytes instead of an integer of the specified length. */
    00021 /* h refers to the host's ordering method. */
    00022
    00023 /* So, to convert a 32-bit integer stored in a buffer in little-endian */
    00024 /* format into a uint32_t usable on this machine, you could use: */
    00025 /*   uint32_t value = le32atoh(&buf[3]); */
    00026 /* To put that value back into the buffer, you could use: */
    00027 /*   htole32a(&buf[3], value); */
    00028
    00029 /* Define aliases for the standard byte swapping macros */
    00030 /* Arguments to these macros must be properly aligned on natural word */
    00031 /* boundaries in order to work properly on all architectures */
    00032 #define htobe16(x) htons(x)
    00033 #define htobe32(x) htonl(x)
    00034 #define be16toh(x) ntohs(x)
    00035 #define be32toh(x) ntohl(x)
    00036
    00037 #define HTOBE16(x) (x) = htobe16(x)
    00038 #define HTOBE32(x) (x) = htobe32(x)
    00039 #define BE32TOH(x) (x) = be32toh(x)
    00040 #define BE16TOH(x) (x) = be16toh(x)
    00041
    00042 /* Define our own extended byte swapping macros for big-endian machines */
    00043 #define htole16(x)      swap16(x)
    00044 #define htole32(x)      swap32(x)
    00045 #define le16toh(x)      swap16(x)
    00046 #define le32toh(x)      swap32(x)
    00047
    00048 #define htobe64(x)      (x)
    00049 #define be64toh(x)      (x)
    00050
    00051 #define HTOLE16(x)      (x) = htole16(x)
    00052 #define HTOLE32(x)      (x) = htole32(x)
    00053 #define LE16TOH(x)      (x) = le16toh(x)
    00054 #define LE32TOH(x)      (x) = le32toh(x)
    00055
    00056 #define HTOBE64(x)      (void) (x)
    00057 #define BE64TOH(x)      (void) (x)
    00058
    00059 /* Define the C99 standard length-specific integer types */
    00060 #include "libptp-stdint.h"
    00061
    00062 /* Here are some macros to create integers from a byte array */
    00063 /* These are used to get and put integers from/into a uint8_t array */
    00064 /* with a specific endianness.  This is the most portable way to generate */
    00065 /* and read messages to a network or serial device.  Each member of a */
    00066 /* packet structure must be handled separately. */
    00067
    00068 /* Non-optimized but portable macros */
    00069 #define be16atoh(x)     ((uint16_t)(((x)[0]<<8)|(x)[1]))
    00070 #define be32atoh(x)     ((uint32_t)(((x)[0]<<24)|((x)[1]<<16)|((x)[2]<<8)|(x)[3]))
    00071 #define be64atoh(x)     ((uint64_t)(((x)[0]<<56)|((x)[1]<<48)|((x)[2]<<40)| \
    00072         ((x)[3]<<32)|((x)[4]<<24)|((x)[5]<<16)|((x)[6]<<8)|(x)[7]))
    00073 #define le16atoh(x)     ((uint16_t)(((x)[1]<<8)|(x)[0]))
    00074 #define le32atoh(x)     ((uint32_t)(((x)[3]<<24)|((x)[2]<<16)|((x)[1]<<8)|(x)[0]))
    00075 #define le64atoh(x)     ((uint64_t)(((x)[7]<<56)|((x)[6]<<48)|((x)[5]<<40)| \
    00076         ((x)[4]<<32)|((x)[3]<<24)|((x)[2]<<16)|((x)[1]<<8)|(x)[0]))
    00077
    00078 #define htobe16a(a,x)   (a)[0]=(uint8_t)((x)>>8), (a)[1]=(uint8_t)(x)
    00079 #define htobe32a(a,x)   (a)[0]=(uint8_t)((x)>>24), (a)[1]=(uint8_t)((x)>>16), \
    00080         (a)[2]=(uint8_t)((x)>>8), (a)[3]=(uint8_t)(x)
    00081 #define htobe64a(a,x)   (a)[0]=(uint8_t)((x)>>56), (a)[1]=(uint8_t)((x)>>48), \
    00082         (a)[2]=(uint8_t)((x)>>40), (a)[3]=(uint8_t)((x)>>32), \
    00083         (a)[4]=(uint8_t)((x)>>24), (a)[5]=(uint8_t)((x)>>16), \
    00084         (a)[6]=(uint8_t)((x)>>8), (a)[7]=(uint8_t)(x)
    00085 #define htole16a(a,x)   (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
    00086 #define htole32a(a,x)   (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
    00087         (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
    00088 #define htole64a(a,x)   (a)[7]=(uint8_t)((x)>>56), (a)[6]=(uint8_t)((x)>>48), \
    00089         (a)[5]=(uint8_t)((x)>>40), (a)[4]=(uint8_t)((x)>>32), \
    00090         (a)[3]=(uint8_t)((x)>>24), (a)[2]=(uint8_t)((x)>>16), \
    00091         (a)[1]=(uint8_t)((x)>>8), (a)[0]=(uint8_t)(x)
    00092
    00093 #endif /*__BYTEORDER_H*/