host.h

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/*
Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
All rights reserved.

This file is part of the VLFeat library and is made available under
the terms of the BSD license (see the COPYING file).
*/

#ifndef VL_HOST_H
#define VL_HOST_H

#if defined(__DOXYGEN__)
#define VL_DISABLE_THREADS
#define VL_DISABLE_SSE2
#define VL_DISABLE_OPENMP
#endif

#if defined(__DOXYGEN__)
#define VL_EXPORT
#define VL_INLINE
#endif

#define VL_STRINGIFY(x) # x

#define VL_XSTRINGIFY(x) VL_STRINGIFY(x)

#define VL_CAT(x,y) x ## y

#define VL_XCAT(x,y) VL_CAT(x,y)

#define VL_XCAT3(x,y,z) VL_XCAT(VL_XCAT(x,y),z)

#define VL_XCAT4(x,y,z,u) VL_XCAT(VL_XCAT3(x,y,z),u)

#define VL_XCAT5(x,y,z,u,v) VL_XCAT(VL_XCAT4(x,y,z,u),v)

#define VL_YESNO(x) ((x)?"yes":"no")

/*
 The following macros identify the host OS, architecture and compiler.
 They are derived from http://predef.sourceforge.net/
 */

#if defined(linux)     || \
    defined(__linux)   || \
    defined(__linux__) || \
    defined(__DOXYGEN__)
#define VL_OS_LINUX 1
#endif

#if (defined(__APPLE__) & defined(__MACH__)) || \
     defined(__DOXYGEN__)
#define VL_OS_MACOSX 1
#endif

#if defined(__WIN32__) || \
    defined(_WIN32)    || \
    defined(__DOXYGEN__)
#define VL_OS_WIN 1
#endif

#if defined(_WIN64) || \
    defined(__DOXYGEN__)
#define VL_OS_WIN64 1
#endif

#if defined(VL_OS_MACOSX) || defined(VL_OS_LINUX) || \
defined(__DOXYGEN__)
#define VL_THREADS_POSIX 1
#endif

#if defined(VL_OS_WIN) || defined(VL_OS_WIN64) || \
defined(__DOXYGEN__)
#define VL_THREADS_WIN 1
#endif

#if defined(__GNUC__) || defined(__DOXYGEN__)
# if defined(__GNUC_PATCHLEVEL__)
#  define VL_COMPILER_GNUC (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100 \
+ __GNUC_PATCHLEVEL__)
# else
#  define VL_COMPILER_GNUC (__GNUC__ * 10000 \
+ __GNUC_MINOR__ * 100)
# endif
#endif

#if defined(_MSC_VER) || defined(__DOXYGEN__)
#define VL_COMPILER_MSC _MSC_VER
#endif

#if defined(__LCC__) || defined(__DOXYGEN__)
#warning "LCC support is experimental!"
#define VL_COMPILER_LCC 1
#endif

#if defined(i386)     || \
    defined(__i386__) || \
    defined(__DOXYGEN__)
#define VL_ARCH_IX86 300
#elif defined(__i486__)
#define VL_ARCH_IX86 400
#elif defined(__i586__)
#define VL_ARCH_IX86 500
#elif defined(__i686__)
#define VL_ARCH_IX86 600
#elif defined(_M_IX86)
#define VL_ARCH_IX86 _M_IX86
#endif

#if defined(_M_X64)    || \
    defined(__amd64__) || \
    defined(__amd64)   || \
    defined(__x86_64)  || \
    defined(__x86_64)
#define VL_ARCH_X64
#endif

#if defined(__ia64__)   || \
    defined(_IA64)      || \
    defined(__IA64)     || \
    defined(__ia64)     || \
    defined(_M_IA64)    || \
    defined(__DOXYGEN__)
#define VL_ARCH_IA64
#endif

#if defined(__LLP64__) || \
    defined(__LLP64)   || \
    defined(__LLP64)   || \
    (defined(VL_COMPILER_MSC) & defined(VL_OS_WIN64)) || \
    (defined(VL_COMPILER_LCC) & defined(VL_OS_WIN64)) || \
    defined(__DOXYGEN__)
#define VL_COMPILER_LLP64
#endif

#if defined(__LP64__) || \
    defined(__LP64)   || \
    defined(__LP64)   || \
    (defined(VL_OS_MACOSX) & defined(VL_ARCH_IA64)) || \
    defined(__DOXYGEN__)
#define VL_COMPILER_LP64
#endif

#if (!defined(VL_COMPILER_LLP64) & !defined(VL_COMPILER_LP64)) || \
    defined(__DOXYGEN__)
#define VL_COMPILER_ILP32
#endif

#if defined(__LITTLE_ENDIAN__) || \
    defined(VL_ARCH_IX86)      || \
    defined(VL_ARCH_IA64)      || \
    defined(VL_ARCH_X64)       || \
    defined(__DOXYGEN__)
#define VL_ARCH_LITTLE_ENDIAN
#endif

#if  defined(__DOXYGEN__) || \
    !defined(VL_ARCH_LITTLE_ENDIAN)
#define VL_ARCH_BIG_ENDIAN
#endif

#if defined(VL_COMPILER_MSC) & ! defined(__DOXYGEN__)
#  define VL_UNUSED
#  define VL_INLINE static __inline
#  define snprintf _snprintf
#  define isnan _isnan
#  ifdef VL_BUILD_DLL
#    ifdef __cplusplus
#      define VL_EXPORT extern "C" __declspec(dllexport)
#    else
#      define VL_EXPORT extern __declspec(dllexport)
#    endif
#  else
#    ifdef __cplusplus
#      define VL_EXPORT extern "C" __declspec(dllimport)
#    else
#      define VL_EXPORT extern __declspec(dllimport)
#    endif
#  endif
#endif

#if defined(VL_COMPILER_LCC) & ! defined(__DOXYGEN__)
#  define VL_UNUSED
#  define VL_INLINE static __inline
#  define snprintf _snprintf
#  define isnan _isnan
VL_INLINE float fabsf(float x) { return (float) fabs((double) x) ; }
#  ifdef VL_BUILD_DLL
#    define VL_EXPORT extern __declspec(dllexport)
#  else
#    define VL_EXPORT extern
#  endif
#endif

#if defined(VL_COMPILER_GNUC) & ! defined(__DOXYGEN__)
#  define VL_UNUSED __attribute__((unused))
#  define VL_INLINE static __inline__
#  ifdef VL_BUILD_DLL
#    ifdef __cplusplus
#      define VL_EXPORT __attribute__((visibility ("default"))) extern "C"
#    else
#      define VL_EXPORT __attribute__((visibility ("default"))) extern
#    endif
#  else
#    ifdef __cplusplus
#      define VL_EXPORT extern "C"
#    else
#      define VL_EXPORT extern
#    endif
#  endif
#endif

VL_EXPORT char * vl_static_configuration_to_string_copy () ;

#define VL_TRUE 1   
#define VL_FALSE 0  
#if defined(VL_COMPILER_LP64) || defined(VL_COMPILER_LLP64)
typedef long long           vl_int64 ;   
typedef int                 vl_int32 ;   
typedef short               vl_int16 ;   
typedef char                vl_int8  ;   
typedef long long unsigned  vl_uint64 ;  
typedef int       unsigned  vl_uint32 ;  
typedef short     unsigned  vl_uint16 ;  
typedef char      unsigned  vl_uint8 ;   
typedef int                 vl_int ;     
typedef unsigned int        vl_uint ;    
typedef int                 vl_bool ;    
typedef vl_int64            vl_intptr ;  
typedef vl_uint64           vl_uintptr ; 
typedef vl_uint64           vl_size ;    
typedef vl_int64            vl_index ;   
typedef vl_uint64           vl_uindex ;  
#endif

#if defined(VL_COMPILER_ILP32)

#ifdef VL_COMPILER_MSC
typedef __int64             vl_int64 ;
#else
typedef long long           vl_int64 ;
#endif

typedef int                 vl_int32 ;
typedef short               vl_int16 ;
typedef char                vl_int8  ;

#ifdef VL_COMPILER_MSC
typedef __int64   unsigned  vl_uint64 ;
#else
typedef long long unsigned  vl_uint64 ;
#endif
typedef int       unsigned  vl_uint32 ;
typedef short     unsigned  vl_uint16 ;
typedef char      unsigned  vl_uint8 ;

typedef int                 vl_int ;
typedef unsigned int        vl_uint ;

typedef int                 vl_bool ;
typedef vl_int32            vl_intptr ;
typedef vl_uint32           vl_uintptr ;
typedef vl_uint32           vl_size ;
typedef vl_int32            vl_index ;
typedef vl_uint32           vl_uindex ;
#endif

#if defined(VL_COMPILER_LP64) || defined(__DOXYGEN__)
#define VL_INT8_C(x) x
#define VL_INT16_C(x) x
#define VL_INT32_C(x) x
#define VL_INT64_C(x) x ## L

#define VL_UINT8_C(x) x
#define VL_UINT16_C(x) x
#define VL_UINT32_C(x) x ## U
#define VL_UINT64_C(x) x ## UL
#endif

#if (defined(VL_COMPILER_LLP64) || defined(VL_COMPILER_ILP32)) \
    & !defined(__DOXYGEN__)
#define VL_INT8_C(x) x
#define VL_INT16_C(x) x
#define VL_INT32_C(x) x
#define VL_INT64_C(x) x ## LL

#define VL_UINT8_C(x) x
#define VL_UINT16_C(x) x
#define VL_UINT32_C(x) x ## U
#define VL_UINT64_C(x) x ## ULL
#endif

/* Lengths only: */

#ifdef VL_COMPILER_MSC
#define VL_FL_INT64  "I64"
#else
#define VL_FL_INT64  "ll"
#endif
#define VL_FL_INT32  ""
#define VL_FL_INT16  "h"
#define VL_FL_INT8   "hh"

#if defined(VL_COMPILER_LP64) || defined(VL_COMPILER_LLP64)
#define VL_FL_INDEX VL_FL_INT64
#endif

#if defined(VL_COMPILER_ILP32)
#define VL_FL_INDEX VL_FL_INT32
#endif

/* Formats (but not conversions!): */

#define VL_FMT_INDEX   VL_FL_INDEX "d"
#define VL_FMT_INTPTR  VL_FMT_INDEX
#define VL_FMT_UINDEX  VL_FL_INDEX "u"
#define VL_FMT_SIZE    VL_FMT_UINDEX
#define VL_FMT_UINTPTR VL_FMT_UINDEX

#define VL_BIG_INT  0x7FFFFFFFL

#define VL_SMALL_INT  (- VL_BIG_INT - 1)

#define VL_BIG_UINT 0xFFFFFFFFUL

VL_INLINE void vl_swap_host_big_endianness_8 (void *dst, void* src) ;
VL_INLINE void vl_swap_host_big_endianness_4 (void *dst, void* src) ;
VL_INLINE void vl_swap_host_big_endianness_2 (void *dst, void* src) ;
typedef struct _VlX86CpuInfo
{
  union {
    char string [0x20] ;
    vl_uint32 words [0x20 / 4] ;
  } vendor ;
  vl_bool hasAVX ;
  vl_bool hasSSE42 ;
  vl_bool hasSSE41 ;
  vl_bool hasSSE3 ;
  vl_bool hasSSE2 ;
  vl_bool hasSSE ;
  vl_bool hasMMX ;
} VlX86CpuInfo ;

void _vl_x86cpu_info_init (VlX86CpuInfo *self) ;
char * _vl_x86cpu_info_to_string_copy (VlX86CpuInfo const *self) ;

VL_INLINE void
vl_swap_host_big_endianness_8 (void *dst, void* src)
{
  char *dst_ = (char*) dst ;
  char *src_ = (char*) src ;
#if defined(VL_ARCH_BIG_ENDIAN)
    dst_ [0] = src_ [0] ;
    dst_ [1] = src_ [1] ;
    dst_ [2] = src_ [2] ;
    dst_ [3] = src_ [3] ;
    dst_ [4] = src_ [4] ;
    dst_ [5] = src_ [5] ;
    dst_ [6] = src_ [6] ;
    dst_ [7] = src_ [7] ;
#else
    dst_ [0] = src_ [7] ;
    dst_ [1] = src_ [6] ;
    dst_ [2] = src_ [5] ;
    dst_ [3] = src_ [4] ;
    dst_ [4] = src_ [3] ;
    dst_ [5] = src_ [2] ;
    dst_ [6] = src_ [1] ;
    dst_ [7] = src_ [0] ;
#endif
}

VL_INLINE void
vl_swap_host_big_endianness_4 (void *dst, void* src)
{
  char *dst_ = (char*) dst ;
  char *src_ = (char*) src ;
#if defined(VL_ARCH_BIG_ENDIAN)
    dst_ [0] = src_ [0] ;
    dst_ [1] = src_ [1] ;
    dst_ [2] = src_ [2] ;
    dst_ [3] = src_ [3] ;
#else
    dst_ [0] = src_ [3] ;
    dst_ [1] = src_ [2] ;
    dst_ [2] = src_ [1] ;
    dst_ [3] = src_ [0] ;
#endif
}

VL_INLINE void
vl_swap_host_big_endianness_2 (void *dst, void* src)
{
  char *dst_ = (char*) dst ;
  char *src_ = (char*) src ;
#if defined(VL_ARCH_BIG_ENDIAN)
    dst_ [0] = src_ [0] ;
    dst_ [1] = src_ [1] ;
#else
    dst_ [0] = src_ [1] ;
    dst_ [1] = src_ [0] ;
#endif
}

/* VL_HOST_H */
#endif