| #ifndef CASS_ENDIAN |
| #define CASS_ENDIAN |
| |
| /* Detect endianness of machine |
| * Returns true if machine uses little endian format and |
| * false if it uses big endian format |
| */ |
| static inline int isLittleEndian() { |
| union { |
| uint16_t word; |
| uint8_t byte; |
| } endian_test; |
| |
| endian_test.word = 0x00FF; |
| return (endian_test.byte == 0xFF); |
| } |
| |
| /* Convert 32-bit integer and floats between the two endianness |
| * formats. Note that you *must* use the float version for |
| * floating point variables because the compiler inserts |
| * additional `magic' for accesses to floating point variables. |
| */ |
| union __float_and_int { |
| uint32_t i; |
| float f; |
| }; |
| |
| #define bswap_float(x) \ |
| ({ union __float_and_int __x; __x.f = x; __x.i = \ |
| ((__x.i & 0xff000000) >> 24) | ((__x.i & 0x00ff0000) >> 8) | \ |
| ((__x.i & 0x0000ff00) << 8) | ((__x.i & 0x000000ff) << 24);__x.f;}) |
| |
| #define bswap_int32(x) \ |
| ( (((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \ |
| (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24) ) |
| |
| #endif |
