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Changeset 11207

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Timestamp:
08/07/08 17:36:08 (4 months ago)
Author:
vboxsync
Message:

iprt/cdefs.h: Created a set of byte swapping macros for constants for use in case statements and swapping at compile time.

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  • trunk/include/iprt/cdefs.h

    r11198 r11207  
    10571057 * Reverses the byte order of an uint64_t value. */ 
    10581058#if 0 
    1059 # define RT_BSWAP_U64(u64)  RT_MAKE_U64(RT_H2BE_U32((u64) >> 32), RT_H2BE_U32((u64) & 0xffffffff)) 
    1060 #else 
     1059# define RT_BSWAP_U64(u64)  RT_BSWAP_U64_C(u64) 
     1060#elif defined(__GNUC__) 
     1061/** @todo use __builtin_constant_p? */ 
    10611062# define RT_BSWAP_U64(u64)  ASMByteSwapU64(u64) 
     1063#else 
     1064# define RT_BSWAP_U64(u64)  ASMByteSwapU64(u64) 
    10621065#endif 
    10631066 
    10641067/** @def RT_BSWAP_U32 
    1065  * Converts uint32_t value from host to big endian byte order. */ 
     1068 * Reverses the byte order of an uint32_t value. */ 
    10661069#if 0 
    1067 # define RT_BSWAP_U32(u32)  (RT_BYTE4(u32) | (RT_BYTE3(u32) << 8) | (RT_BYTE2(u32) << 16) | (RT_BYTE1(u32) << 24)) 
    1068 #else 
     1070# define RT_BSWAP_U32(u32)  RT_BSWAP_U32_C(u32) 
     1071#elif defined(__GNUC__) 
     1072/** @todo use __builtin_constant_p? */ 
    10691073# define RT_BSWAP_U32(u32)  ASMByteSwapU32(u32) 
     1074#else 
     1075# define RT_BSWAP_U32(u32)  ASMByteSwapU32(u32) 
    10701076#endif 
    10711077 
    10721078/** @def RT_BSWAP_U16 
    1073  * Converts uint16_t value from host to big endian byte order. */ 
     1079 * Reverses the byte order of an uint16_t value. */ 
    10741080#if 0 
    1075 # define RT_BSWAP_U16(u16)  (RT_HIBYTE(u16) | (RT_LOBYTE(u16) << 8)) 
    1076 #else 
     1081# define RT_BSWAP_U16(u16)  RT_BSWAP_U16_C(u16) 
     1082#elif defined(__GNUC__) 
     1083/** @todo use __builtin_constant_p? */ 
    10771084# define RT_BSWAP_U16(u16)  ASMByteSwapU16(u16) 
    1078 #endif 
     1085#else 
     1086# define RT_BSWAP_U16(u16)  ASMByteSwapU16(u16) 
     1087#endif 
     1088 
     1089 
     1090/** @def RT_BSWAP_U64_C 
     1091 * Reverses the byte order of an uint64_t constant. */ 
     1092#define RT_BSWAP_U64_C(u64) RT_MAKE_U64(RT_BSWAP_U32_C((u64) >> 32), RT_BSWAP_U32_C((u64) & 0xffffffff)) 
     1093 
     1094/** @def RT_BSWAP_U32_C 
     1095 * Reverses the byte order of an uint32_t constant. */ 
     1096#define RT_BSWAP_U32_C(u32) (RT_BYTE4(u32) | (RT_BYTE3(u32) << 8) | (RT_BYTE2(u32) << 16) | (RT_BYTE1(u32) << 24)) 
     1097 
     1098/** @def RT_BSWAP_U16_C 
     1099 * Reverses the byte order of an uint16_t constant. */ 
     1100#define RT_BSWAP_U16_C(u16) (RT_HIBYTE(u16) | (RT_LOBYTE(u16) << 8)) 
    10791101 
    10801102 
    …… 
    10871109#endif 
    10881110 
     1111/** @def RT_H2LE_U64_C 
     1112 * Converts an uint64_t constant from host to little endian byte order. */ 
     1113#ifdef RT_BIG_ENDIAN 
     1114# define RT_H2LE_U64_C(u64) RT_BSWAP_U64_C(u64) 
     1115#else 
     1116# define RT_H2LE_U64_C(u64) (u64) 
     1117#endif 
     1118 
    10891119/** @def RT_H2LE_U32 
    10901120 * Converts an uint32_t value from host to little endian byte order. */ 
    …… 
    10951125#endif 
    10961126 
     1127/** @def RT_H2LE_U32_C 
     1128 * Converts an uint32_t constant from host to little endian byte order. */ 
     1129#ifdef RT_BIG_ENDIAN 
     1130# define RT_H2LE_U32_C(u32) RT_BSWAP_U32_C(u32) 
     1131#else 
     1132# define RT_H2LE_U32_C(u32) (u32) 
     1133#endif 
     1134 
    10971135/** @def RT_H2LE_U16 
    10981136 * Converts an uint16_t value from host to little endian byte order. */ 
    …… 
    11031141#endif 
    11041142 
     1143/** @def RT_H2LE_U16_C 
     1144 * Converts an uint16_t constant from host to little endian byte order. */ 
     1145#ifdef RT_BIG_ENDIAN 
     1146# define RT_H2LE_U16_C(u16) RT_BSWAP_U16_C(u16) 
     1147#else 
     1148# define RT_H2LE_U16_C(u16) (u16) 
     1149#endif 
     1150 
     1151 
    11051152/** @def RT_LE2H_U64 
    11061153 * Converts an uint64_t value from little endian to host byte order. */ 
    …… 
    11111158#endif 
    11121159 
     1160/** @def RT_LE2H_U64_C 
     1161 * Converts an uint64_t constant from little endian to host byte order. */ 
     1162#ifdef RT_BIG_ENDIAN 
     1163# define RT_LE2H_U64_C(u64) RT_BSWAP_U64_C(u64) 
     1164#else 
     1165# define RT_LE2H_U64_C(u64) (u64) 
     1166#endif 
     1167 
    11131168/** @def RT_LE2H_U32 
    11141169 * Converts an uint32_t value from little endian to host byte order. */ 
    …… 
    11191174#endif 
    11201175 
     1176/** @def RT_LE2H_U32_C 
     1177 * Converts an uint32_t constant from little endian to host byte order. */ 
     1178#ifdef RT_BIG_ENDIAN 
     1179# define RT_LE2H_U32_C(u32) RT_BSWAP_U32_C(u32) 
     1180#else 
     1181# define RT_LE2H_U32_C(u32) (u32) 
     1182#endif 
     1183 
    11211184/** @def RT_LE2H_U16 
    11221185 * Converts an uint16_t value from little endian to host byte order. */ 
    …… 
    11271190#endif 
    11281191 
     1192/** @def RT_LE2H_U16_C 
     1193 * Converts an uint16_t constant from little endian to host byte order. */ 
     1194#ifdef RT_BIG_ENDIAN 
     1195# define RT_LE2H_U16_C(u16) RT_BSWAP_U16_C(u16) 
     1196#else 
     1197# define RT_LE2H_U16_C(u16) (u16) 
     1198#endif 
     1199 
    11291200 
    11301201/** @def RT_H2BE_U64 
    …… 
    11361207#endif 
    11371208 
     1209/** @def RT_H2BE_U64_C 
     1210 * Converts an uint64_t constant from host to big endian byte order. */ 
     1211#ifdef RT_BIG_ENDIAN 
     1212# define RT_H2BE_U64_C(u64) (u64) 
     1213#else 
     1214# define RT_H2BE_U64_C(u64) RT_BSWAP_U64_C(u64) 
     1215#endif 
     1216 
    11381217/** @def RT_H2BE_U32 
    11391218 * Converts an uint32_t value from host to big endian byte order. */ 
    …… 
    11441223#endif 
    11451224 
     1225/** @def RT_H2BE_U32_C 
     1226 * Converts an uint32_t constant from host to big endian byte order. */ 
     1227#ifdef RT_BIG_ENDIAN 
     1228# define RT_H2BE_U32_C(u32) (u32) 
     1229#else 
     1230# define RT_H2BE_U32_C(u32) RT_BSWAP_U32_C(u32) 
     1231#endif 
     1232 
    11461233/** @def RT_H2BE_U16 
    11471234 * Converts an uint16_t value from host to big endian byte order. */ 
    …… 
    11521239#endif 
    11531240 
     1241/** @def RT_H2BE_U16_C 
     1242 * Converts an uint16_t constant from host to big endian byte order. */ 
     1243#ifdef RT_BIG_ENDIAN 
     1244# define RT_H2BE_U16_C(u16) (u16) 
     1245#else 
     1246# define RT_H2BE_U16_C(u16) RT_BSWAP_U16_C(u16) 
     1247#endif 
     1248 
    11541249/** @def RT_BE2H_U64 
    11551250 * Converts an uint64_t value from big endian to host byte order. */ 
    …… 
    11601255#endif 
    11611256 
     1257/** @def RT_BE2H_U64 
     1258 * Converts an uint64_t constant from big endian to host byte order. */ 
     1259#ifdef RT_BIG_ENDIAN 
     1260# define RT_BE2H_U64_C(u64) (u64) 
     1261#else 
     1262# define RT_BE2H_U64_C(u64) RT_BSWAP_U64_C(u64) 
     1263#endif 
     1264 
    11621265/** @def RT_BE2H_U32 
    11631266 * Converts an uint32_t value from big endian to host byte order. */ 
    …… 
    11681271#endif 
    11691272 
     1273/** @def RT_BE2H_U32_C 
     1274 * Converts an uint32_t value from big endian to host byte order. */ 
     1275#ifdef RT_BIG_ENDIAN 
     1276# define RT_BE2H_U32_C(u32) (u32) 
     1277#else 
     1278# define RT_BE2H_U32_C(u32) RT_BSWAP_U32_C(u32) 
     1279#endif 
     1280 
    11701281/** @def RT_BE2H_U16 
    11711282 * Converts an uint16_t value from big endian to host byte order. */ 
    …… 
    11741285#else 
    11751286# define RT_BE2H_U16(u16)   RT_BSWAP_U16(u16) 
     1287#endif 
     1288 
     1289/** @def RT_BE2H_U16_C 
     1290 * Converts an uint16_t constant from big endian to host byte order. */ 
     1291#ifdef RT_BIG_ENDIAN 
     1292# define RT_BE2H_U16_C(u16) (u16) 
     1293#else 
     1294# define RT_BE2H_U16_C(u16) RT_BSWAP_U16_C(u16) 
    11761295#endif 
    11771296 
    …… 
    11811300#define RT_H2N_U64(u64)     RT_H2BE_U64(u64) 
    11821301 
     1302/** @def RT_H2N_U64_C 
     1303 * Converts an uint64_t constant from host to network byte order. */ 
     1304#define RT_H2N_U64_C(u64)   RT_H2BE_U64_C(u64) 
     1305 
    11831306/** @def RT_H2N_U32 
    11841307 * Converts an uint32_t value from host to network byte order. */ 
    11851308#define RT_H2N_U32(u32)     RT_H2BE_U32(u32) 
    11861309 
     1310/** @def RT_H2N_U32_C 
     1311 * Converts an uint32_t constant from host to network byte order. */ 
     1312#define RT_H2N_U32_C(u32)   RT_H2BE_U32_C(u32) 
     1313 
    11871314/** @def RT_H2N_U16 
    11881315 * Converts an uint16_t value from host to network byte order. */ 
    11891316#define RT_H2N_U16(u16)     RT_H2BE_U16(u16) 
    11901317 
     1318/** @def RT_H2N_U16_C 
     1319 * Converts an uint16_t constant from host to network byte order. */ 
     1320#define RT_H2N_U16_C(u16)   RT_H2BE_U16_C(u16) 
     1321 
    11911322/** @def RT_N2H_U64 
    11921323 * Converts an uint64_t value from network to host byte order. */ 
    11931324#define RT_N2H_U64(u64)     RT_BE2H_U64(u64) 
    11941325 
     1326/** @def RT_N2H_U64_C 
     1327 * Converts an uint64_t constant from network to host byte order. */ 
     1328#define RT_N2H_U64_C(u64)   RT_BE2H_U64_C(u64) 
     1329 
    11951330/** @def RT_N2H_U32 
    11961331 * Converts an uint32_t value from network to host byte order. */ 
    11971332#define RT_N2H_U32(u32)     RT_BE2H_U32(u32) 
    11981333 
     1334/** @def RT_N2H_U32_C 
     1335 * Converts an uint32_t constant from network to host byte order. */ 
     1336#define RT_N2H_U32_C(u32)   RT_BE2H_U32_C(u32) 
     1337 
    11991338/** @def RT_N2H_U16 
    12001339 * Converts an uint16_t value from network to host byte order. */ 
    12011340#define RT_N2H_U16(u16)     RT_BE2H_U16(u16) 
     1341 
     1342/** @def RT_N2H_U16_C 
     1343 * Converts an uint16_t value from network to host byte order. */ 
     1344#define RT_N2H_U16_C(u16)   RT_BE2H_U16_C(u16) 
    12021345 
    12031346 

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