libgphoto2 photo camera library (libgphoto2) API
2.5.13
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00001 /* This file is generated automatically by configure */ 00002 /* It is valid only for the system type i586-alt-linux-gnu */ 00003 00004 #ifndef __BYTEORDER_H 00005 #define __BYTEORDER_H 00006 00007 /* ntohl and relatives live here */ 00008 #include <arpa/inet.h> 00009 #define __HAVE_NTOHL 00010 00011 /* Define generic byte swapping functions */ 00012 #include <byteswap.h> 00013 #define swap16(x) bswap_16(x) 00014 #define swap32(x) bswap_32(x) 00015 #define swap64(x) bswap_64(x) 00016 00017 /* The byte swapping macros have the form: */ 00018 /* EENN[a]toh or htoEENN[a] where EE is be (big endian) or */ 00019 /* le (little-endian), NN is 16 or 32 (number of bits) and a, */ 00020 /* if present, indicates that the endian side is a pointer to an */ 00021 /* array of uint8_t bytes instead of an integer of the specified length. */ 00022 /* h refers to the host's ordering method. */ 00023 00024 /* So, to convert a 32-bit integer stored in a buffer in little-endian */ 00025 /* format into a uint32_t usable on this machine, you could use: */ 00026 /* uint32_t value = le32atoh(&buf[3]); */ 00027 /* To put that value back into the buffer, you could use: */ 00028 /* htole32a(&buf[3], value); */ 00029 00030 /* Define aliases for the standard byte swapping macros */ 00031 /* Arguments to these macros must be properly aligned on natural word */ 00032 /* boundaries in order to work properly on all architectures */ 00033 #ifndef htobe16 00034 # ifdef __HAVE_NTOHL 00035 # define htobe16(x) htons(x) 00036 # else 00037 # ifdef WORDS_BIGENDIAN 00038 # define htobe16(x) (x) 00039 # else 00040 # define htobe16(x) swap16(x) 00041 # endif 00042 # endif 00043 #endif 00044 #ifndef htobe32 00045 # ifdef __HAVE_NTOHL 00046 # define htobe32(x) htonl(x) 00047 # else 00048 # ifdef WORDS_BIGENDIAN 00049 # define htobe32(x) (x) 00050 # else 00051 # define htobe32(x) swap32(x) 00052 # endif 00053 # endif 00054 #endif 00055 #ifndef be16toh 00056 # define be16toh(x) htobe16(x) 00057 #endif 00058 #ifndef be32toh 00059 # define be32toh(x) htobe32(x) 00060 #endif 00061 00062 #define HTOBE16(x) (x) = htobe16(x) 00063 #define HTOBE32(x) (x) = htobe32(x) 00064 #define BE32TOH(x) (x) = be32toh(x) 00065 #define BE16TOH(x) (x) = be16toh(x) 00066 00067 /* On little endian machines, these macros are null */ 00068 #ifndef htole16 00069 # define htole16(x) (x) 00070 #endif 00071 #ifndef htole32 00072 # define htole32(x) (x) 00073 #endif 00074 #ifndef htole64 00075 # define htole64(x) (x) 00076 #endif 00077 #ifndef le16toh 00078 # define le16toh(x) (x) 00079 #endif 00080 #ifndef le32toh 00081 # define le32toh(x) (x) 00082 #endif 00083 #ifndef le64toh 00084 # define le64toh(x) (x) 00085 #endif 00086 00087 #define HTOLE16(x) (void) (x) 00088 #define HTOLE32(x) (void) (x) 00089 #define HTOLE64(x) (void) (x) 00090 #define LE16TOH(x) (void) (x) 00091 #define LE32TOH(x) (void) (x) 00092 #define LE64TOH(x) (void) (x) 00093 00094 /* These don't have standard aliases */ 00095 #ifndef htobe64 00096 # define htobe64(x) swap64(x) 00097 #endif 00098 #ifndef be64toh 00099 # define be64toh(x) swap64(x) 00100 #endif 00101 00102 #define HTOBE64(x) (x) = htobe64(x) 00103 #define BE64TOH(x) (x) = be64toh(x) 00104 00105 /* Define the C99 standard length-specific integer types */ 00106 #include <_stdint.h> 00107 00108 /* Here are some macros to create integers from a byte array */ 00109 /* These are used to get and put integers from/into a uint8_t array */ 00110 /* with a specific endianness. This is the most portable way to generate */ 00111 /* and read messages to a network or serial device. Each member of a */ 00112 /* packet structure must be handled separately. */ 00113 00114 /* The i386 and compatibles can handle unaligned memory access, */ 00115 /* so use the optimized macros above to do this job */ 00116 #ifndef be16atoh 00117 # define be16atoh(x) be16toh(*(uint16_t*)(x)) 00118 #endif 00119 #ifndef be32atoh 00120 # define be32atoh(x) be32toh(*(uint32_t*)(x)) 00121 #endif 00122 #ifndef be64atoh 00123 # define be64atoh(x) be64toh(*(uint64_t*)(x)) 00124 #endif 00125 #ifndef le16atoh 00126 # define le16atoh(x) le16toh(*(uint16_t*)(x)) 00127 #endif 00128 #ifndef le32atoh 00129 # define le32atoh(x) le32toh(*(uint32_t*)(x)) 00130 #endif 00131 #ifndef le64atoh 00132 # define le64atoh(x) le64toh(*(uint64_t*)(x)) 00133 #endif 00134 00135 #ifndef htob16a 00136 # define htobe16a(a,x) *(uint16_t*)(a) = htobe16(x) 00137 #endif 00138 #ifndef htobe32a 00139 # define htobe32a(a,x) *(uint32_t*)(a) = htobe32(x) 00140 #endif 00141 #ifndef htobe64a 00142 # define htobe64a(a,x) *(uint64_t*)(a) = htobe64(x) 00143 #endif 00144 #ifndef htole16a 00145 # define htole16a(a,x) *(uint16_t*)(a) = htole16(x) 00146 #endif 00147 #ifndef htole32a 00148 # define htole32a(a,x) *(uint32_t*)(a) = htole32(x) 00149 #endif 00150 #ifndef htole64a 00151 # define htole64a(a,x) *(uint64_t*)(a) = htole64(x) 00152 #endif 00153 00154 #endif /*__BYTEORDER_H*/