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Diffstat (limited to 'thirdparty/thekla_atlas/poshlib/posh.c')
| -rw-r--r-- | thirdparty/thekla_atlas/poshlib/posh.c | 1006 |
1 files changed, 0 insertions, 1006 deletions
diff --git a/thirdparty/thekla_atlas/poshlib/posh.c b/thirdparty/thekla_atlas/poshlib/posh.c deleted file mode 100644 index bd3fcc66ea..0000000000 --- a/thirdparty/thekla_atlas/poshlib/posh.c +++ /dev/null @@ -1,1006 +0,0 @@ -/* -LICENSE: - -Copyright (c) 2004, Brian Hook -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are -met: - - * Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - * Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following - disclaimer in the documentation and/or other materials provided - with the distribution. - - * The names of this package'ss contributors contributors may not - be used to endorse or promote products derived from this - software without specific prior written permission. - - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ -/** - @file posh.c - @author Brian Hook - @date 2002 - @brief Portable Open Source Harness primary source file -*/ -#include "posh.h" - -#if !defined FORCE_DOXYGEN - -#if !defined POSH_NO_FLOAT -# define POSH_FLOAT_STRING "enabled" -#else -# define POSH_FLOAT_STRING "disabled" -#endif - -#if defined POSH_64BIT_INTEGER -# define POSH_64BIT_INTEGER_STRING "yes" -#else -# define POSH_64BIT_INTEGER_STRING "no" -#endif - -#if defined POSH_64BIT_POINTER -# define POSH_POINTER_STRING "64-bits" -#else -# define POSH_POINTER_STRING "32-bits" -#endif - -#if defined POSH_LITTLE_ENDIAN -# define IS_BIG_ENDIAN 0 - -# define NATIVE16 POSH_LittleU16 -# define NATIVE32 POSH_LittleU32 -# define NATIVE64 POSH_LittleU64 -# define FOREIGN16 POSH_BigU16 -# define FOREIGN32 POSH_BigU32 -# define FOREIGN64 POSH_BigU64 -#else -# define IS_BIG_ENDIAN 1 - -# define NATIVE16 POSH_BigU16 -# define NATIVE32 POSH_BigU32 -# define NATIVE64 POSH_BigU64 -# define FOREIGN16 POSH_LittleU16 -# define FOREIGN32 POSH_LittleU32 -# define FOREIGN64 POSH_LittleU64 -#endif /* POSH_LITTLE_ENDIAN */ - -static -int -s_testBigEndian( void ) -{ - union - { - posh_byte_t c[ 4 ]; - posh_u32_t i; - } u; - - u.i= 1; - - if ( u.c[ 0 ] == 1 ) - { - return 0; - } - return 1; -} - -static -const char * -s_testSerialization( void ) -{ - posh_byte_t serbuf[ 8 ]; - posh_u16_t tmp16; - posh_u32_t tmp32; - - /* 16-bit serialization */ - POSH_WriteU16ToLittle( serbuf, 0xABCD ); - if ( ( tmp16 = POSH_ReadU16FromLittle( serbuf ) ) != 0xABCD ) - { - return "*ERROR: failed little-endian 16-bit serialization test"; - } - - POSH_WriteU16ToBig( serbuf, 0xABCD ); - if ( ( tmp16 = POSH_ReadU16FromBig( serbuf ) ) != 0xABCD ) - { - return "*ERROR: failed big-endian 16-bit serialization test"; - } - - /* 32-bit serialization */ - POSH_WriteU32ToLittle( serbuf, 0xABCD1234L ); - if ( ( tmp32 = POSH_ReadU32FromLittle( serbuf ) ) != 0xABCD1234 ) - { - return "*ERROR: failed little-endian 32-bit serialization test"; - } - - POSH_WriteU32ToBig( serbuf, 0xABCD1234L ); - if ( ( tmp32 = POSH_ReadU32FromBig( serbuf ) ) != 0xABCD1234 ) - { - return "*ERROR: failed big-endian 32-bit serialization test"; - } - -#if defined POSH_64BIT_INTEGER - { -#define REF64 POSH_U64(0xFEDCBA9876543210) - - posh_u64_t tmp64; - - POSH_WriteU64ToLittle( serbuf, REF64 ); - - if ( ( tmp64 = POSH_ReadU64FromLittle( serbuf ) ) != REF64 ) - { - return "*ERROR: failed little-endian 64-bit serialization test"; - } - - POSH_WriteU64ToBig( serbuf, REF64 ); - - if ( ( tmp64 = POSH_ReadU64FromBig( serbuf ) ) != REF64 ) - { - return "*ERROR: failed big-endian 64-bit serialization test"; - } - } -#endif - - return 0; -} - -#if !defined POSH_NO_FLOAT -static -const char * -s_testFloatingPoint( void ) -{ - float fRef = 10.0f/30.0f; - double dRef = 10.0/30.0; - posh_byte_t dbuf[ 8 ]; - float fTmp; - double dTmp; - - fTmp = POSH_FloatFromLittleBits( POSH_LittleFloatBits( fRef ) ); - - if ( fTmp != fRef ) - { - return "*ERROR: POSH little endian floating point conversion failed. Please report this to poshlib@poshlib.org!\n"; - } - - fTmp = POSH_FloatFromBigBits( POSH_BigFloatBits( fRef ) ); - if ( fTmp != fRef ) - { - return "*ERROR: POSH big endian floating point conversion failed. Please report this to poshlib@poshlib.org!\n"; - } - - POSH_DoubleBits( dRef, dbuf ); - - dTmp = POSH_DoubleFromBits( dbuf ); - - if ( dTmp != dRef ) - { - return "*ERROR: POSH double precision floating point serialization failed. Please report this to poshlib@poshlib.org!\n"; - } - - return 0; -} -#endif /* !defined POSH_NO_FLOAT */ - -static -const char * -s_testEndianess( void ) -{ - /* check endianess */ - if ( s_testBigEndian() != IS_BIG_ENDIAN ) - { - return "*ERROR: POSH compile time endianess does not match run-time endianess verification. Please report this to poshlib@poshlib.org!\n"; - } - - /* make sure our endian swap routines work */ - if ( ( NATIVE32( 0x11223344L ) != 0x11223344L ) || - ( FOREIGN32( 0x11223344L ) != 0x44332211L ) || - ( NATIVE16( 0x1234 ) != 0x1234 ) || - ( FOREIGN16( 0x1234 ) != 0x3412 ) ) - { - return "*ERROR: POSH endianess macro selection failed. Please report this to poshlib@poshlib.org!\n"; - } - - /* test serialization routines */ - - return 0; -} -#endif /* !defined FORCE_DOXYGEN */ - -/** - Returns a string describing this platform's basic attributes. - - POSH_GetArchString() reports on an architecture's statically determined - attributes. In addition, it will perform run-time verification checks - to make sure the various platform specific functions work. If an error - occurs, please contact me at poshlib@poshlib.org so we can try to resolve - what the specific failure case is. - @returns a string describing this platform on success, or a string in the - form "*ERROR: [text]" on failure. You can simply check to see if - the first character returned is '*' to verify an error condition. -*/ -const char * -POSH_GetArchString( void ) -{ - const char *err; - const char *s = "OS:.............."POSH_OS_STRING"\n" - "CPU:............."POSH_CPU_STRING"\n" - "endian:.........."POSH_ENDIAN_STRING"\n" - "ptr size:........"POSH_POINTER_STRING"\n" - "64-bit ints......"POSH_64BIT_INTEGER_STRING"\n" - "floating point..."POSH_FLOAT_STRING"\n" - "compiler........."POSH_COMPILER_STRING"\n"; - - /* test endianess */ - err = s_testEndianess(); - - if ( err != 0 ) - { - return err; - } - - /* test serialization */ - err = s_testSerialization(); - - if ( err != 0 ) - { - return err; - } - -#if !defined POSH_NO_FLOAT - /* check that our floating point support is correct */ - err = s_testFloatingPoint(); - - if ( err != 0 ) - { - return err; - } - -#endif - - return s; -} - -/* ---------------------------------------------------------------------------*/ -/* BYTE SWAPPING SUPPORT */ -/* ---------------------------------------------------------------------------*/ -/** - * Byte swaps a 16-bit unsigned value - * - @ingroup ByteSwapFunctions - @param v [in] unsigned 16-bit input value to swap - @returns a byte swapped version of v - */ -posh_u16_t -POSH_SwapU16( posh_u16_t v ) -{ - posh_u16_t swapped; - - swapped = v << 8; - swapped |= v >> 8; - - return swapped; -} - -/** - * Byte swaps a 16-bit signed value - * - @ingroup ByteSwapFunctions - @param v [in] signed 16-bit input value to swap - @returns a byte swapped version of v - @remarks This just calls back to the unsigned version, since byte swapping - is independent of sign. However, we still provide this function to - avoid signed/unsigned mismatch compiler warnings. - */ -posh_i16_t -POSH_SwapI16( posh_i16_t v ) -{ - return ( posh_i16_t ) POSH_SwapU16( v ); -} - -/** - * Byte swaps a 32-bit unsigned value - * - @ingroup ByteSwapFunctions - @param v [in] unsigned 32-bit input value to swap - @returns a byte swapped version of v - */ -posh_u32_t -POSH_SwapU32( posh_u32_t v ) -{ - posh_u32_t swapped; - - swapped = ( v & 0xFF ) << 24; - swapped |= ( v & 0xFF00 ) << 8; - swapped |= ( v >> 8 ) & 0xFF00; - swapped |= ( v >> 24 ); - - return swapped; -} - -/** - * Byte swaps a 32-bit signed value - * - @ingroup ByteSwapFunctions - @param v [in] signed 32-bit input value to swap - @returns a byte swapped version of v - @remarks This just calls back to the unsigned version, since byte swapping - is independent of sign. However, we still provide this function to - avoid signed/unsigned mismatch compiler warnings. - */ -posh_i32_t -POSH_SwapI32( posh_i32_t v ) -{ - return ( posh_i32_t ) POSH_SwapU32( ( posh_u32_t ) v ); -} - -#if defined POSH_64BIT_INTEGER -/** - * Byte swaps a 64-bit unsigned value - - @param v [in] a 64-bit input value to swap - @ingroup SixtyFourBit - @returns a byte swapped version of v -*/ -posh_u64_t -POSH_SwapU64( posh_u64_t v ) -{ - posh_byte_t tmp; - union { - posh_byte_t bytes[ 8 ]; - posh_u64_t u64; - } u; - - u.u64 = v; - - tmp = u.bytes[ 0 ]; u.bytes[ 0 ] = u.bytes[ 7 ]; u.bytes[ 7 ] = tmp; - tmp = u.bytes[ 1 ]; u.bytes[ 1 ] = u.bytes[ 6 ]; u.bytes[ 6 ] = tmp; - tmp = u.bytes[ 2 ]; u.bytes[ 2 ] = u.bytes[ 5 ]; u.bytes[ 5 ] = tmp; - tmp = u.bytes[ 3 ]; u.bytes[ 3 ] = u.bytes[ 4 ]; u.bytes[ 4 ] = tmp; - - return u.u64; -} - -/** - * Byte swaps a 64-bit signed value - - @param v [in] a 64-bit input value to swap - @ingroup SixtyFourBit - @returns a byte swapped version of v -*/ -posh_i64_t -POSH_SwapI64( posh_i64_t v ) -{ - return ( posh_i64_t ) POSH_SwapU64( ( posh_u64_t ) v ); -} - -#endif /* defined POSH_64BIT_INTEGER */ - -/* ---------------------------------------------------------------------------*/ -/* IN-MEMORY SERIALIZATION */ -/* ---------------------------------------------------------------------------*/ - -/** - * Writes an unsigned 16-bit value to a little endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL. Alignment doesn't matter. - @param value [in] host-endian unsigned 16-bit value - @returns a pointer to the location two bytes after dst - @remarks does no validation of the inputs -*/ -posh_u16_t * -POSH_WriteU16ToLittle( void *dst, posh_u16_t value ) -{ - posh_u16_t *p16 = ( posh_u16_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - - p[ 0 ] = value & 0xFF; - p[ 1 ] = ( value & 0xFF00) >> 8; - - return p16 + 1; -} - -/** - * Writes a signed 16-bit value to a little endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 16-bit value - @returns a pointer to the location two bytes after dst - @remarks does no validation of the inputs. This simply calls - POSH_WriteU16ToLittle() with appropriate casting. -*/ -posh_i16_t * -POSH_WriteI16ToLittle( void *dst, posh_i16_t value ) -{ - return ( posh_i16_t * ) POSH_WriteU16ToLittle( dst, ( posh_u16_t ) value ); -} - -/** - * Writes an unsigned 32-bit value to a little endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 32-bit value - @returns a pointer to the location four bytes after dst - @remarks does no validation of the inputs. -*/ -posh_u32_t * -POSH_WriteU32ToLittle( void *dst, posh_u32_t value ) -{ - posh_u32_t *p32 = ( posh_u32_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - - p[ 0 ] = ( value & 0xFF ); - p[ 1 ] = ( value & 0xFF00 ) >> 8; - p[ 2 ] = ( value & 0xFF0000 ) >> 16; - p[ 3 ] = ( value & 0xFF000000 ) >> 24; - - return p32 + 1; -} - -/** - * Writes a signed 32-bit value to a little endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 32-bit value - @returns a pointer to the location four bytes after dst - @remarks does no validation of the inputs. This simply calls - POSH_WriteU32ToLittle() with appropriate casting. -*/ -posh_i32_t * -POSH_WriteI32ToLittle( void *dst, posh_i32_t value ) -{ - return ( posh_i32_t * ) POSH_WriteU32ToLittle( dst, ( posh_u32_t ) value ); -} - -/** - * Writes an unsigned 16-bit value to a big endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian unsigned 16-bit value - @returns a pointer to the location two bytes after dst - @remarks does no validation of the inputs -*/ -posh_u16_t * -POSH_WriteU16ToBig( void *dst, posh_u16_t value ) -{ - posh_u16_t *p16 = ( posh_u16_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - - p[ 1 ] = ( value & 0xFF ); - p[ 0 ] = ( value & 0xFF00 ) >> 8; - - return p16 + 1; -} - -/** - * Writes a signed 16-bit value to a big endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 16-bit value - @returns a pointer to the location two bytes after dst - @remarks does no validation of the inputs. This simply calls - POSH_WriteU16ToLittle() with appropriate casting. -*/ -posh_i16_t * -POSH_WriteI16ToBig( void *dst, posh_i16_t value ) -{ - return ( posh_i16_t * ) POSH_WriteU16ToBig( dst, ( posh_u16_t ) value ); -} - -/** - * Writes an unsigned 32-bit value to a big endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian unsigned 32-bit value - @returns a pointer to the location four bytes after dst - @remarks does no validation of the inputs. -*/ -posh_u32_t * -POSH_WriteU32ToBig( void *dst, posh_u32_t value ) -{ - posh_u32_t *p32 = ( posh_u32_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - - p[ 3 ] = ( value & 0xFF ); - p[ 2 ] = ( value & 0xFF00 ) >> 8; - p[ 1 ] = ( value & 0xFF0000 ) >> 16; - p[ 0 ] = ( value & 0xFF000000 ) >> 24; - - return p32 + 1; -} - -/** - * Writes a signed 32-bit value to a big endian buffer - - @ingroup MemoryBuffer - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 32-bit value - @returns a pointer to the location four bytes after dst - @remarks does no validation of the inputs. This simply calls - POSH_WriteU32ToBig() with appropriate casting. -*/ -posh_i32_t * -POSH_WriteI32ToBig( void *dst, posh_i32_t value ) -{ - return ( posh_i32_t * ) POSH_WriteU32ToBig( dst, ( posh_u32_t ) value ); -} - -#if defined POSH_64BIT_INTEGER -/** - * Writes an unsigned 64-bit value to a little-endian buffer - - @ingroup SixtyFourBit - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian unsigned 64-bit value - @returns a pointer to the location eight bytes after dst - @remarks does no validation of the inputs. -*/ -posh_u64_t * -POSH_WriteU64ToLittle( void *dst, posh_u64_t value ) -{ - posh_u64_t *p64 = ( posh_u64_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - int i; - - for ( i = 0; i < 8; i++, value >>= 8 ) - { - p[ i ] = ( posh_byte_t ) ( value & 0xFF ); - } - - return p64 + 1; -} - -/** - * Writes a signed 64-bit value to a little-endian buffer - - @ingroup SixtyFourBit - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian unsigned 64-bit value - @returns a pointer to the location eight bytes after dst - @remarks does no validation of the inputs. -*/ -posh_i64_t * -POSH_WriteI64ToLittle( void *dst, posh_i64_t value ) -{ - return ( posh_i64_t * ) POSH_WriteU64ToLittle( dst, ( posh_u64_t ) value ); -} - -/** - * Writes an unsigned 64-bit value to a big-endian buffer - - @ingroup SixtyFourBit - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian unsigned 64-bit value - @returns a pointer to the location eight bytes after dst - @remarks does no validation of the inputs. -*/ -posh_u64_t * -POSH_WriteU64ToBig( void *dst, posh_u64_t value ) -{ - posh_u64_t *p64 = ( posh_u64_t * ) dst; - posh_byte_t *p = ( posh_byte_t * ) dst; - int i; - - for ( i = 0; i < 8; i++, value >>= 8 ) - { - p[ 7-i ] = ( posh_byte_t ) ( value & 0xFF ); - } - - return p64 + 8; -} - -/** - * Writes a signed 64-bit value to a big-endian buffer - - @ingroup SixtyFourBit - @param dst [out] pointer to the destination buffer, may not be NULL - @param value [in] host-endian signed 64-bit value - @returns a pointer to the location eight bytes after dst - @remarks does no validation of the inputs. -*/ -posh_i64_t * -POSH_WriteI64ToBig( void *dst, posh_i64_t value ) -{ - return ( posh_i64_t * ) POSH_WriteU64ToBig( dst, ( posh_u64_t ) value ); -} - -#endif /* POSH_64BIT_INTEGER */ - -/* ---------------------------------------------------------------------------*/ -/* IN-MEMORY DESERIALIZATION */ -/* ---------------------------------------------------------------------------*/ - -/** - * Reads an unsigned 16-bit value from a little-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian unsigned 16-bit value -*/ -posh_u16_t -POSH_ReadU16FromLittle( const void *src ) -{ - posh_u16_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - - v |= p[ 0 ]; - v |= ( ( posh_u16_t ) p[ 1 ] ) << 8; - - return v; -} - -/** - * Reads a signed 16-bit value from a little-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian signed 16-bit value -*/ -posh_i16_t -POSH_ReadI16FromLittle( const void *src ) -{ - return ( posh_i16_t ) POSH_ReadU16FromLittle( src ); -} - -/** - * Reads an unsigned 32-bit value from a little-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian unsigned 32-bit value -*/ -posh_u32_t -POSH_ReadU32FromLittle( const void *src ) -{ - posh_u32_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - - v |= p[ 0 ]; - v |= ( ( posh_u32_t ) p[ 1 ] ) << 8; - v |= ( ( posh_u32_t ) p[ 2 ] ) << 16; - v |= ( ( posh_u32_t ) p[ 3 ] ) << 24; - - return v; -} - -/** - * Reads a signed 32-bit value from a little-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian signed 32-bit value -*/ -posh_i32_t -POSH_ReadI32FromLittle( const void *src ) -{ - return ( posh_i32_t ) POSH_ReadU32FromLittle( src ); -} - - -/** - * Reads an unsigned 16-bit value from a big-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian unsigned 16-bit value -*/ -posh_u16_t -POSH_ReadU16FromBig( const void *src ) -{ - posh_u16_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - - v |= p[ 1 ]; - v |= ( ( posh_u16_t ) p[ 0 ] ) << 8; - - return v; -} - -/** - * Reads a signed 16-bit value from a big-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian signed 16-bit value -*/ -posh_i16_t -POSH_ReadI16FromBig( const void *src ) -{ - return ( posh_i16_t ) POSH_ReadU16FromBig( src ); -} - -/** - * Reads an unsigned 32-bit value from a big-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian unsigned 32-bit value -*/ -posh_u32_t -POSH_ReadU32FromBig( const void *src ) -{ - posh_u32_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - - v |= p[ 3 ]; - v |= ( ( posh_u32_t ) p[ 2 ] ) << 8; - v |= ( ( posh_u32_t ) p[ 1 ] ) << 16; - v |= ( ( posh_u32_t ) p[ 0 ] ) << 24; - - return v; -} - -/** - * Reads a signed 32-bit value from a big-endian buffer - @ingroup MemoryBuffer - @param src [in] source buffer - @returns host-endian signed 32-bit value -*/ -posh_i32_t -POSH_ReadI32FromBig( const void *src ) -{ - return POSH_BigI32( (*(const posh_i32_t*)src ) ); -} - -#if defined POSH_64BIT_INTEGER - -/** - * Reads an unsigned 64-bit value from a little-endian buffer - @param src [in] source buffer - @returns host-endian unsigned 32-bit value -*/ -posh_u64_t -POSH_ReadU64FromLittle( const void *src ) -{ - posh_u64_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - int i; - - for ( i = 0; i < 8; i++ ) - { - v |= ( ( posh_u64_t ) p[ i ] ) << (i*8); - } - - return v; -} - -/** - * Reads a signed 64-bit value from a little-endian buffer - @param src [in] source buffer - @returns host-endian signed 32-bit value -*/ -posh_i64_t -POSH_ReadI64FromLittle( const void *src ) -{ - return ( posh_i64_t ) POSH_ReadU64FromLittle( src ); -} - -/** - * Reads an unsigned 64-bit value from a big-endian buffer - @param src [in] source buffer - @returns host-endian unsigned 32-bit value -*/ -posh_u64_t -POSH_ReadU64FromBig( const void *src ) -{ - posh_u64_t v = 0; - posh_byte_t *p = ( posh_byte_t * ) src; - int i; - - for ( i = 0; i < 8; i++ ) - { - v |= ( ( posh_u64_t ) p[ 7-i ] ) << (i*8); - } - - return v; -} - -/** - * Reads an signed 64-bit value from a big-endian buffer - @param src [in] source buffer - @returns host-endian signed 32-bit value -*/ -posh_i64_t -POSH_ReadI64FromBig( const void *src ) -{ - return ( posh_i64_t ) POSH_ReadU64FromBig( src ); -} - -#endif /* POSH_64BIT_INTEGER */ - -/* ---------------------------------------------------------------------------*/ -/* FLOATING POINT SUPPORT */ -/* ---------------------------------------------------------------------------*/ - -#if !defined POSH_NO_FLOAT - -/** @ingroup FloatingPoint - @param[in] f floating point value - @returns a little-endian bit representation of f - */ -posh_u32_t -POSH_LittleFloatBits( float f ) -{ - union - { - float f32; - posh_u32_t u32; - } u; - - u.f32 = f; - - return POSH_LittleU32( u.u32 ); -} - -/** - * Extracts raw big-endian bits from a 32-bit floating point value - * - @ingroup FloatingPoint - @param f [in] floating point value - @returns a big-endian bit representation of f - */ -posh_u32_t -POSH_BigFloatBits( float f ) -{ - union - { - float f32; - posh_u32_t u32; - } u; - - u.f32 = f; - - return POSH_BigU32( u.u32 ); -} - -/** - * Extracts raw, little-endian bit representation from a 64-bit double. - * - @param d [in] 64-bit double precision value - @param dst [out] 8-byte storage buffer - @ingroup FloatingPoint - @returns the raw bits used to represent the value 'd', in the form dst[0]=LSB - */ -void -POSH_DoubleBits( double d, posh_byte_t dst[ 8 ] ) -{ - union - { - double d64; - posh_byte_t bytes[ 8 ]; - } u; - - u.d64 = d; - -#if defined POSH_LITTLE_ENDIAN - dst[ 0 ] = u.bytes[ 0 ]; - dst[ 1 ] = u.bytes[ 1 ]; - dst[ 2 ] = u.bytes[ 2 ]; - dst[ 3 ] = u.bytes[ 3 ]; - dst[ 4 ] = u.bytes[ 4 ]; - dst[ 5 ] = u.bytes[ 5 ]; - dst[ 6 ] = u.bytes[ 6 ]; - dst[ 7 ] = u.bytes[ 7 ]; -#else - dst[ 0 ] = u.bytes[ 7 ]; - dst[ 1 ] = u.bytes[ 6 ]; - dst[ 2 ] = u.bytes[ 5 ]; - dst[ 3 ] = u.bytes[ 4 ]; - dst[ 4 ] = u.bytes[ 3 ]; - dst[ 5 ] = u.bytes[ 2 ]; - dst[ 6 ] = u.bytes[ 1 ]; - dst[ 7 ] = u.bytes[ 0 ]; -#endif -} - -/** - * Creates a double-precision, 64-bit floating point value from a set of raw, - * little-endian bits - - @ingroup FloatingPoint - @param src [in] little-endian byte representation of 64-bit double precision - floating point value - @returns double precision floating point representation of the raw bits - @remarks No error checking is performed, so there are no guarantees that the - result is a valid number, nor is there any check to ensure that src is - non-NULL. BE CAREFUL USING THIS. - */ -double -POSH_DoubleFromBits( const posh_byte_t src[ 8 ] ) -{ - union - { - double d64; - posh_byte_t bytes[ 8 ]; - } u; - -#if defined POSH_LITTLE_ENDIAN - u.bytes[ 0 ] = src[ 0 ]; - u.bytes[ 1 ] = src[ 1 ]; - u.bytes[ 2 ] = src[ 2 ]; - u.bytes[ 3 ] = src[ 3 ]; - u.bytes[ 4 ] = src[ 4 ]; - u.bytes[ 5 ] = src[ 5 ]; - u.bytes[ 6 ] = src[ 6 ]; - u.bytes[ 7 ] = src[ 7 ]; -#else - u.bytes[ 0 ] = src[ 7 ]; - u.bytes[ 1 ] = src[ 6 ]; - u.bytes[ 2 ] = src[ 5 ]; - u.bytes[ 3 ] = src[ 4 ]; - u.bytes[ 4 ] = src[ 3 ]; - u.bytes[ 5 ] = src[ 2 ]; - u.bytes[ 6 ] = src[ 1 ]; - u.bytes[ 7 ] = src[ 0 ]; -#endif - - return u.d64; -} - -/** - * Creates a floating point number from little endian bits - * - @ingroup FloatingPoint - @param bits [in] raw floating point bits in little-endian form - @returns a floating point number based on the given bit representation - @remarks No error checking is performed, so there are no guarantees that the - result is a valid number. BE CAREFUL USING THIS. - */ -float -POSH_FloatFromLittleBits( posh_u32_t bits ) -{ - union - { - float f32; - posh_u32_t u32; - } u; - - u.u32 = bits; -#if defined POSH_BIG_ENDIAN - u.u32 = POSH_SwapU32( u.u32 ); -#endif - - return u.f32; -} - -/** - * Creates a floating point number from big-endian bits - * - @ingroup FloatingPoint - @param bits [in] raw floating point bits in big-endian form - @returns a floating point number based on the given bit representation - @remarks No error checking is performed, so there are no guarantees that the - result is a valid number. BE CAREFUL USING THIS. - */ -float -POSH_FloatFromBigBits( posh_u32_t bits ) -{ - union - { - float f32; - posh_u32_t u32; - } u; - - u.u32 = bits; -#if defined POSH_LITTLE_ENDIAN - u.u32 = POSH_SwapU32( u.u32 ); -#endif - - return u.f32; -} - -#endif /* !defined POSH_NO_FLOAT */ |