gphoto2-endian.h

00001 /* This file is generated automatically by configure */
00002 /* It is valid only for the system type i386-pc-solaris2.11 */
00003 
00004 #ifndef __BYTEORDER_H
00005 #define __BYTEORDER_H
00006 
00007 /* ntohl and relatives live here */
00008 #include <arpa/inet.h>
00009 
00010 /* Use these as generic byteswapping macros on this little endian system */
00011 #define swap16(x)               ntohs(x)
00012 #define swap32(x)               ntohl(x)
00013 /* No optimized 64 bit byte swapping macro is available */
00014 #define swap64(x) ((uint64_t)(((uint64_t)(x) << 56) & 0xff00000000000000ULL | \
00015                               ((uint64_t)(x) << 40) & 0x00ff000000000000ULL | \
00016                               ((uint64_t)(x) << 24) & 0x0000ff0000000000ULL | \
00017                               ((uint64_t)(x) << 8)  & 0x000000ff00000000ULL | \
00018                               ((x) >> 8)  & 0x00000000ff000000ULL | \
00019                               ((x) >> 24) & 0x0000000000ff0000ULL | \
00020                               ((x) >> 40) & 0x000000000000ff00ULL | \
00021                               ((x) >> 56) & 0x00000000000000ffULL))
00022 
00023 /* The byte swapping macros have the form: */
00024 /*   EENN[a]toh or htoEENN[a] where EE is be (big endian) or */
00025 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */
00026 /* if present, indicates that the endian side is a pointer to an */
00027 /* array of uint8_t bytes instead of an integer of the specified length. */
00028 /* h refers to the host's ordering method. */
00029 
00030 /* So, to convert a 32-bit integer stored in a buffer in little-endian */
00031 /* format into a uint32_t usable on this machine, you could use: */
00032 /*   uint32_t value = le32atoh(&buf[3]); */
00033 /* To put that value back into the buffer, you could use: */
00034 /*   htole32a(&buf[3], value); */
00035 
00036 /* Define aliases for the standard byte swapping macros */
00037 /* Arguments to these macros must be properly aligned on natural word */
00038 /* boundaries in order to work properly on all architectures */
00039 #define htobe16(x) htons(x)
00040 #define htobe32(x) htonl(x)
00041 #define be16toh(x) ntohs(x)
00042 #define be32toh(x) ntohl(x)
00043 
00044 #define HTOBE16(x) (x) = htobe16(x)
00045 #define HTOBE32(x) (x) = htobe32(x)
00046 #define BE32TOH(x) (x) = be32toh(x)
00047 #define BE16TOH(x) (x) = be16toh(x)
00048 
00049 /* On little endian machines, these macros are null */
00050 #define htole16(x)      (x)
00051 #define htole32(x)      (x)
00052 #define htole64(x)      (x)
00053 #define le16toh(x)      (x)
00054 #define le32toh(x)      (x)
00055 #define le64toh(x)      (x)
00056 
00057 #define HTOLE16(x)      (void) (x)
00058 #define HTOLE32(x)      (void) (x)
00059 #define HTOLE64(x)      (void) (x)
00060 #define LE16TOH(x)      (void) (x)
00061 #define LE32TOH(x)      (void) (x)
00062 #define LE64TOH(x)      (void) (x)
00063 
00064 /* These don't have standard aliases */
00065 #define htobe64(x)      swap64(x)
00066 #define be64toh(x)      swap64(x)
00067 
00068 #define HTOBE64(x)      (x) = htobe64(x)
00069 #define BE64TOH(x)      (x) = be64toh(x)
00070 
00071 /* Define the C99 standard length-specific integer types */
00072 #include "libptp-stdint.h"
00073 
00074 /* Here are some macros to create integers from a byte array */
00075 /* These are used to get and put integers from/into a uint8_t array */
00076 /* with a specific endianness.  This is the most portable way to generate */
00077 /* and read messages to a network or serial device.  Each member of a */
00078 /* packet structure must be handled separately. */
00079 
00080 /* The i386 and compatibles can handle unaligned memory access, */
00081 /* so use the optimized macros above to do this job */
00082 #define be16atoh(x)     be16toh(*(uint16_t*)(x))
00083 #define be32atoh(x)     be32toh(*(uint32_t*)(x))
00084 #define be64atoh(x)     be64toh(*(uint64_t*)(x))
00085 #define le16atoh(x)     le16toh(*(uint16_t*)(x))
00086 #define le32atoh(x)     le32toh(*(uint32_t*)(x))
00087 #define le64atoh(x)     le64toh(*(uint64_t*)(x))
00088 
00089 #define htobe16a(a,x)   *(uint16_t*)(a) = htobe16(x)
00090 #define htobe32a(a,x)   *(uint32_t*)(a) = htobe32(x)
00091 #define htobe64a(a,x)   *(uint64_t*)(a) = htobe64(x)
00092 #define htole16a(a,x)   *(uint16_t*)(a) = htole16(x)
00093 #define htole32a(a,x)   *(uint32_t*)(a) = htole32(x)
00094 #define htole64a(a,x)   *(uint64_t*)(a) = htole64(x)
00095 
00096 #endif /*__BYTEORDER_H*/

Generated on Mon Jan 5 21:05:33 2009 for libmtp by  doxygen 1.4.6