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gphoto2-endian.h

00001 /* This file is generated automatically by configure */
00002 /* It is valid only for the system type powerpc64-unknown-linux-gnu */
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 <_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*/

Generated on Thu Jun 14 21:43:51 2007 for libgphoto2 (libgphoto2) by  doxygen 1.4.2