mycrypt_macros.h

/* fix for MSVC ...evil! */
#ifdef _MSC_VER
   #define CONST64(n) n ## ui64
   typedef unsigned __int64 ulong64;
#else
   #define CONST64(n) n ## ULL
   typedef unsigned long long ulong64;
#endif

/* this is the "32-bit at least" data type 
 * Re-define it to suit your platform but it must be at least 32-bits 
 */
#if defined(__x86_64__)
   typedef unsigned ulong32;
#else
   typedef unsigned long ulong32;
#endif

/* ---- HELPER MACROS ---- */
#ifdef ENDIAN_NEUTRAL

#define STORE32L(x, y)                                                                     \
     { (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255);   \
       (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }

#define LOAD32L(x, y)                            \
     { x = ((unsigned long)((y)[3] & 255)<<24) | \
           ((unsigned long)((y)[2] & 255)<<16) | \
           ((unsigned long)((y)[1] & 255)<<8)  | \
           ((unsigned long)((y)[0] & 255)); }

#define STORE64L(x, y)                                                                     \
     { (y)[7] = (unsigned char)(((x)>>56)&255); (y)[6] = (unsigned char)(((x)>>48)&255);   \
       (y)[5] = (unsigned char)(((x)>>40)&255); (y)[4] = (unsigned char)(((x)>>32)&255);   \
       (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255);   \
       (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }

#define LOAD64L(x, y)                                                       \
     { x = (((ulong64)((y)[7] & 255))<<56)|(((ulong64)((y)[6] & 255))<<48)| \
           (((ulong64)((y)[5] & 255))<<40)|(((ulong64)((y)[4] & 255))<<32)| \
           (((ulong64)((y)[3] & 255))<<24)|(((ulong64)((y)[2] & 255))<<16)| \
           (((ulong64)((y)[1] & 255))<<8)|(((ulong64)((y)[0] & 255))); }

#define STORE32H(x, y)                                                                     \
     { (y)[0] = (unsigned char)(((x)>>24)&255); (y)[1] = (unsigned char)(((x)>>16)&255);   \
       (y)[2] = (unsigned char)(((x)>>8)&255); (y)[3] = (unsigned char)((x)&255); }

#define LOAD32H(x, y)                            \
     { x = ((unsigned long)((y)[0] & 255)<<24) | \
           ((unsigned long)((y)[1] & 255)<<16) | \
           ((unsigned long)((y)[2] & 255)<<8)  | \
           ((unsigned long)((y)[3] & 255)); }

#define STORE64H(x, y)                                                                     \
   { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255);     \
     (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255);     \
     (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255);     \
     (y)[6] = (unsigned char)(((x)>>8)&255); (y)[7] = (unsigned char)((x)&255); }

#define LOAD64H(x, y)                                                      \
   { x = (((ulong64)((y)[0] & 255))<<56)|(((ulong64)((y)[1] & 255))<<48) | \
         (((ulong64)((y)[2] & 255))<<40)|(((ulong64)((y)[3] & 255))<<32) | \
         (((ulong64)((y)[4] & 255))<<24)|(((ulong64)((y)[5] & 255))<<16) | \
         (((ulong64)((y)[6] & 255))<<8)|(((ulong64)((y)[7] & 255))); }

#endif /* ENDIAN_NEUTRAL */

#ifdef ENDIAN_LITTLE

#define STORE32H(x, y)                                                                     \
     { (y)[0] = (unsigned char)(((x)>>24)&255); (y)[1] = (unsigned char)(((x)>>16)&255);   \
       (y)[2] = (unsigned char)(((x)>>8)&255); (y)[3] = (unsigned char)((x)&255); }

#define LOAD32H(x, y)                            \
     { x = ((unsigned long)((y)[0] & 255)<<24) | \
           ((unsigned long)((y)[1] & 255)<<16) | \
           ((unsigned long)((y)[2] & 255)<<8)  | \
           ((unsigned long)((y)[3] & 255)); }

#define STORE64H(x, y)                                                                     \
   { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255);     \
     (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255);     \
     (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255);     \
     (y)[6] = (unsigned char)(((x)>>8)&255); (y)[7] = (unsigned char)((x)&255); }

#define LOAD64H(x, y)                                                      \
   { x = (((ulong64)((y)[0] & 255))<<56)|(((ulong64)((y)[1] & 255))<<48) | \
         (((ulong64)((y)[2] & 255))<<40)|(((ulong64)((y)[3] & 255))<<32) | \
         (((ulong64)((y)[4] & 255))<<24)|(((ulong64)((y)[5] & 255))<<16) | \
         (((ulong64)((y)[6] & 255))<<8)|(((ulong64)((y)[7] & 255))); }

#ifdef ENDIAN_32BITWORD 

#define STORE32L(x, y)        \
     { unsigned long __t = (x); memcpy(y, &__t, 4); }

#define LOAD32L(x, y)         \
     memcpy(&(x), y, 4);

#define STORE64L(x, y)                                                                     \
     { (y)[7] = (unsigned char)(((x)>>56)&255); (y)[6] = (unsigned char)(((x)>>48)&255);   \
       (y)[5] = (unsigned char)(((x)>>40)&255); (y)[4] = (unsigned char)(((x)>>32)&255);   \
       (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255);   \
       (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }

#define LOAD64L(x, y)                                                       \
     { x = (((ulong64)((y)[7] & 255))<<56)|(((ulong64)((y)[6] & 255))<<48)| \
           (((ulong64)((y)[5] & 255))<<40)|(((ulong64)((y)[4] & 255))<<32)| \
           (((ulong64)((y)[3] & 255))<<24)|(((ulong64)((y)[2] & 255))<<16)| \
           (((ulong64)((y)[1] & 255))<<8)|(((ulong64)((y)[0] & 255))); }

#else /* 64-bit words then  */

#define STORE32L(x, y)        \
     { unsigned long __t = (x); memcpy(y, &__t, 4); }

#define LOAD32L(x, y)         \
     { memcpy(&(x), y, 4); x &= 0xFFFFFFFF; }

#define STORE64L(x, y)        \
     { ulong64 __t = (x); memcpy(y, &__t, 8); }

#define LOAD64L(x, y)         \
    { memcpy(&(x), y, 8); }

#endif /* ENDIAN_64BITWORD */

#endif /* ENDIAN_LITTLE */

#ifdef ENDIAN_BIG
#define STORE32L(x, y)                                                                     \
     { (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255);   \
       (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }

#define LOAD32L(x, y)                            \
     { x = ((unsigned long)((y)[3] & 255)<<24) | \
           ((unsigned long)((y)[2] & 255)<<16) | \
           ((unsigned long)((y)[1] & 255)<<8)  | \
           ((unsigned long)((y)[0] & 255)); }

#define STORE64L(x, y)                                                                     \
   { (y)[7] = (unsigned char)(((x)>>56)&255); (y)[6] = (unsigned char)(((x)>>48)&255);     \
     (y)[5] = (unsigned char)(((x)>>40)&255); (y)[4] = (unsigned char)(((x)>>32)&255);     \
     (y)[3] = (unsigned char)(((x)>>24)&255); (y)[2] = (unsigned char)(((x)>>16)&255);     \
     (y)[1] = (unsigned char)(((x)>>8)&255); (y)[0] = (unsigned char)((x)&255); }

#define LOAD64L(x, y)                                                      \
   { x = (((ulong64)((y)[7] & 255))<<56)|(((ulong64)((y)[6] & 255))<<48) | \
         (((ulong64)((y)[5] & 255))<<40)|(((ulong64)((y)[4] & 255))<<32) | \
         (((ulong64)((y)[3] & 255))<<24)|(((ulong64)((y)[2] & 255))<<16) | \
         (((ulong64)((y)[1] & 255))<<8)|(((ulong64)((y)[0] & 255))); }

#ifdef ENDIAN_32BITWORD 

#define STORE32H(x, y)        \
     { unsigned long __t = (x); memcpy(y, &__t, 4); }

#define LOAD32H(x, y)         \
     memcpy(&(x), y, 4);

#define STORE64H(x, y)                                                                     \
     { (y)[0] = (unsigned char)(((x)>>56)&255); (y)[1] = (unsigned char)(((x)>>48)&255);   \
       (y)[2] = (unsigned char)(((x)>>40)&255); (y)[3] = (unsigned char)(((x)>>32)&255);   \
       (y)[4] = (unsigned char)(((x)>>24)&255); (y)[5] = (unsigned char)(((x)>>16)&255);   \
       (y)[6] = (unsigned char)(((x)>>8)&255);  (y)[7] = (unsigned char)((x)&255); }

#define LOAD64H(x, y)                                                       \
     { x = (((ulong64)((y)[0] & 255))<<56)|(((ulong64)((y)[1] & 255))<<48)| \
           (((ulong64)((y)[2] & 255))<<40)|(((ulong64)((y)[3] & 255))<<32)| \
           (((ulong64)((y)[4] & 255))<<24)|(((ulong64)((y)[5] & 255))<<16)| \
           (((ulong64)((y)[6] & 255))<<8)| (((ulong64)((y)[7] & 255))); }

#else /* 64-bit words then  */

#define STORE32H(x, y)        \
     { unsigned long __t = (x); memcpy(y, &__t, 4); }

#define LOAD32H(x, y)         \
     { memcpy(&(x), y, 4); x &= 0xFFFFFFFF; }

#define STORE64H(x, y)        \
     { ulong64 __t = (x); memcpy(y, &__t, 8); }

#define LOAD64H(x, y)         \
    { memcpy(&(x), y, 8); }

#endif /* ENDIAN_64BITWORD */
#endif /* ENDIAN_BIG */

#define BSWAP(x)  ( ((x>>24)&0x000000FFUL) | ((x<<24)&0xFF000000UL)  | \
                    ((x>>8)&0x0000FF00UL)  | ((x<<8)&0x00FF0000UL) )

#ifdef _MSC_VER

/* instrinsic rotate */
#include <stdlib.h>
#pragma intrinsic(_lrotr,_lrotl)
#define ROR(x,n) _lrotr(x,n)
#define ROL(x,n) _lrotl(x,n)

#elif defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && !defined(INTEL_CC)

static inline unsigned ROL(unsigned word, int i)
{
   __asm__("roll %%cl,%0"
      :"=r" (word)
      :"0" (word),"c" (i));
   return word;
}

static inline unsigned ROR(unsigned word, int i)
{
   __asm__("rorl %%cl,%0"
      :"=r" (word)
      :"0" (word),"c" (i));
   return word;
}

#else

/* rotates the hard way */
#define ROL(x, y) ( (((unsigned long)(x)<<(unsigned long)((y)&31)) | (((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)
#define ROR(x, y) ( ((((unsigned long)(x)&0xFFFFFFFFUL)>>(unsigned long)((y)&31)) | ((unsigned long)(x)<<(unsigned long)(32-((y)&31)))) & 0xFFFFFFFFUL)

#endif

#if defined(__GNUCC__) && defined(__x86_64__)

static inline unsigned long ROL64(unsigned long word, int i)
{
   __asm__("rolq %%cl,%0"
      :"=r" (word)
      :"0" (word),"c" (i));
   return word;
}

static inline unsigned long ROR64(unsigned long word, int i)
{
   __asm__("rorq %%cl,%0"
      :"=r" (word)
      :"0" (word),"c" (i));
   return word;
}

#else

#define ROL64(x, y) \
    ( (((x)<<((ulong64)(y)&63)) | \
      (((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)64-((y)&63)))) & CONST64(0xFFFFFFFFFFFFFFFF))

#define ROR64(x, y) \
    ( ((((x)&CONST64(0xFFFFFFFFFFFFFFFF))>>((ulong64)(y)&CONST64(63))) | \
      ((x)<<((ulong64)(64-((y)&CONST64(63)))))) & CONST64(0xFFFFFFFFFFFFFFFF))

#endif

#undef MAX
#undef MIN
#define MAX(x, y) ( ((x)>(y))?(x):(y) )
#define MIN(x, y) ( ((x)<(y))?(x):(y) )

/* extract a byte portably */
#ifdef _MSC_VER
   #define byte(x, n) ((unsigned char)((x) >> (8 * (n))))
#else
   #define byte(x, n) (((x) >> (8 * (n))) & 255)
#endif