Momentum-Apps/flipbip/lib/crypto/chacha20poly1305/ecrypt_portable.h

/* ecrypt_portable.h */

/*
 * WARNING: the conversions defined below are implemented as macros,
 * and should be used carefully. They should NOT be used with
 * parameters which perform some action. E.g., the following two lines
 * are not equivalent:
 *
 *  1) ++x; y = ROTL32(x, n);
 *  2) y = ROTL32(++x, n);
 */

/*
 * *** Please do not edit this file. ***
 *
 * The default macros can be overridden for specific architectures by
 * editing 'ecrypt_machine.h'.
 */

#ifndef ECRYPT_PORTABLE
#define ECRYPT_PORTABLE

#include "ecrypt_config.h"
#include "ecrypt_types.h"

/* ------------------------------------------------------------------------- */

/*
 * The following macros are used to obtain exact-width results.
 */

#define U8V(v) ((u8)(v)&U8C(0xFF))
#define U16V(v) ((u16)(v)&U16C(0xFFFF))
#define U32V(v) ((u32)(v)&U32C(0xFFFFFFFF))
#define U64V(v) ((u64)(v)&U64C(0xFFFFFFFFFFFFFFFF))

/* ------------------------------------------------------------------------- */

/*
 * The following macros return words with their bits rotated over n
 * positions to the left/right.
 */

#define ECRYPT_DEFAULT_ROT

#define ROTL8(v, n) (U8V((v) << (n)) | ((v) >> (8 - (n))))

#define ROTL16(v, n) (U16V((v) << (n)) | ((v) >> (16 - (n))))

#define ROTL32(v, n) (U32V((v) << (n)) | ((v) >> (32 - (n))))

#define ROTL64(v, n) (U64V((v) << (n)) | ((v) >> (64 - (n))))

#define ROTR8(v, n) ROTL8(v, 8 - (n))
#define ROTR16(v, n) ROTL16(v, 16 - (n))
#define ROTR32(v, n) ROTL32(v, 32 - (n))
#define ROTR64(v, n) ROTL64(v, 64 - (n))

#include "ecrypt_machine.h"

/* ------------------------------------------------------------------------- */

/*
 * The following macros return a word with bytes in reverse order.
 */

#define ECRYPT_DEFAULT_SWAP

#define SWAP16(v) ROTL16(v, 8)

#define SWAP32(v) ((ROTL32(v, 8) & U32C(0x00FF00FF)) | (ROTL32(v, 24) & U32C(0xFF00FF00)))

#ifdef ECRYPT_NATIVE64
#define SWAP64(v)                                                                             \
    ((ROTL64(v, 8) & U64C(0x000000FF000000FF)) | (ROTL64(v, 24) & U64C(0x0000FF000000FF00)) | \
     (ROTL64(v, 40) & U64C(0x00FF000000FF0000)) | (ROTL64(v, 56) & U64C(0xFF000000FF000000)))
#else
#define SWAP64(v) (((u64)SWAP32(U32V(v)) << 32) | (u64)SWAP32(U32V(v >> 32)))
#endif

#include "ecrypt_machine.h"

#define ECRYPT_DEFAULT_WTOW

#ifdef ECRYPT_LITTLE_ENDIAN
#define U16TO16_LITTLE(v) (v)
#define U32TO32_LITTLE(v) (v)
#define U64TO64_LITTLE(v) (v)

#define U16TO16_BIG(v) SWAP16(v)
#define U32TO32_BIG(v) SWAP32(v)
#define U64TO64_BIG(v) SWAP64(v)
#endif

#ifdef ECRYPT_BIG_ENDIAN
#define U16TO16_LITTLE(v) SWAP16(v)
#define U32TO32_LITTLE(v) SWAP32(v)
#define U64TO64_LITTLE(v) SWAP64(v)

#define U16TO16_BIG(v) (v)
#define U32TO32_BIG(v) (v)
#define U64TO64_BIG(v) (v)
#endif

#include "ecrypt_machine.h"

/*
 * The following macros load words from an array of bytes with
 * different types of endianness, and vice versa.
 */

#define ECRYPT_DEFAULT_BTOW

#if(!defined(ECRYPT_UNKNOWN) && defined(ECRYPT_I8T_IS_BYTE))

#define U8TO16_LITTLE(p) U16TO16_LITTLE(((u16*)(p))[0])
#define U8TO32_LITTLE(p) U32TO32_LITTLE(((u32*)(p))[0])
#define U8TO64_LITTLE(p) U64TO64_LITTLE(((u64*)(p))[0])

#define U8TO16_BIG(p) U16TO16_BIG(((u16*)(p))[0])
#define U8TO32_BIG(p) U32TO32_BIG(((u32*)(p))[0])
#define U8TO64_BIG(p) U64TO64_BIG(((u64*)(p))[0])

#define U16TO8_LITTLE(p, v) (((u16*)(p))[0] = U16TO16_LITTLE(v))
#define U32TO8_LITTLE(p, v) (((u32*)(p))[0] = U32TO32_LITTLE(v))
#define U64TO8_LITTLE(p, v) (((u64*)(p))[0] = U64TO64_LITTLE(v))

#define U16TO8_BIG(p, v) (((u16*)(p))[0] = U16TO16_BIG(v))
#define U32TO8_BIG(p, v) (((u32*)(p))[0] = U32TO32_BIG(v))
#define U64TO8_BIG(p, v) (((u64*)(p))[0] = U64TO64_BIG(v))

#else

#define U8TO16_LITTLE(p) (((u16)((p)[0])) | ((u16)((p)[1]) << 8))

#define U8TO32_LITTLE(p) \
    (((u32)((p)[0])) | ((u32)((p)[1]) << 8) | ((u32)((p)[2]) << 16) | ((u32)((p)[3]) << 24))

#ifdef ECRYPT_NATIVE64
#define U8TO64_LITTLE(p)                                                                      \
    (((u64)((p)[0])) | ((u64)((p)[1]) << 8) | ((u64)((p)[2]) << 16) | ((u64)((p)[3]) << 24) | \
     ((u64)((p)[4]) << 32) | ((u64)((p)[5]) << 40) | ((u64)((p)[6]) << 48) |                  \
     ((u64)((p)[7]) << 56))
#else
#define U8TO64_LITTLE(p) ((u64)U8TO32_LITTLE(p) | ((u64)U8TO32_LITTLE((p) + 4) << 32))
#endif

#define U8TO16_BIG(p) (((u16)((p)[0]) << 8) | ((u16)((p)[1])))

#define U8TO32_BIG(p) \
    (((u32)((p)[0]) << 24) | ((u32)((p)[1]) << 16) | ((u32)((p)[2]) << 8) | ((u32)((p)[3])))

#ifdef ECRYPT_NATIVE64
#define U8TO64_BIG(p)                                                        \
    (((u64)((p)[0]) << 56) | ((u64)((p)[1]) << 48) | ((u64)((p)[2]) << 40) | \
     ((u64)((p)[3]) << 32) | ((u64)((p)[4]) << 24) | ((u64)((p)[5]) << 16) | \
     ((u64)((p)[6]) << 8) | ((u64)((p)[7])))
#else
#define U8TO64_BIG(p) (((u64)U8TO32_BIG(p) << 32) | (u64)U8TO32_BIG((p) + 4))
#endif

#define U16TO8_LITTLE(p, v)     \
    do {                        \
        (p)[0] = U8V((v));      \
        (p)[1] = U8V((v) >> 8); \
    } while(0)

#define U32TO8_LITTLE(p, v)      \
    do {                         \
        (p)[0] = U8V((v));       \
        (p)[1] = U8V((v) >> 8);  \
        (p)[2] = U8V((v) >> 16); \
        (p)[3] = U8V((v) >> 24); \
    } while(0)

#ifdef ECRYPT_NATIVE64
#define U64TO8_LITTLE(p, v)      \
    do {                         \
        (p)[0] = U8V((v));       \
        (p)[1] = U8V((v) >> 8);  \
        (p)[2] = U8V((v) >> 16); \
        (p)[3] = U8V((v) >> 24); \
        (p)[4] = U8V((v) >> 32); \
        (p)[5] = U8V((v) >> 40); \
        (p)[6] = U8V((v) >> 48); \
        (p)[7] = U8V((v) >> 56); \
    } while(0)
#else
#define U64TO8_LITTLE(p, v)                      \
    do {                                         \
        U32TO8_LITTLE((p), U32V((v)));           \
        U32TO8_LITTLE((p) + 4, U32V((v) >> 32)); \
    } while(0)
#endif

#define U16TO8_BIG(p, v)        \
    do {                        \
        (p)[0] = U8V((v));      \
        (p)[1] = U8V((v) >> 8); \
    } while(0)

#define U32TO8_BIG(p, v)         \
    do {                         \
        (p)[0] = U8V((v) >> 24); \
        (p)[1] = U8V((v) >> 16); \
        (p)[2] = U8V((v) >> 8);  \
        (p)[3] = U8V((v));       \
    } while(0)

#ifdef ECRYPT_NATIVE64
#define U64TO8_BIG(p, v)         \
    do {                         \
        (p)[0] = U8V((v) >> 56); \
        (p)[1] = U8V((v) >> 48); \
        (p)[2] = U8V((v) >> 40); \
        (p)[3] = U8V((v) >> 32); \
        (p)[4] = U8V((v) >> 24); \
        (p)[5] = U8V((v) >> 16); \
        (p)[6] = U8V((v) >> 8);  \
        (p)[7] = U8V((v));       \
    } while(0)
#else
#define U64TO8_BIG(p, v)                  \
    do {                                  \
        U32TO8_BIG((p), U32V((v) >> 32)); \
        U32TO8_BIG((p) + 4, U32V((v)));   \
    } while(0)
#endif

#endif

#include "ecrypt_machine.h"

/* ------------------------------------------------------------------------- */

#define AT_LEAST_ONE(n) (((n) < 1) ? 1 : (n))

#define ALIGN(t, v, n)                                      \
    union {                                                 \
        t b[n];                                             \
        MAXT l[AT_LEAST_ONE(n * sizeof(t) / sizeof(MAXT))]; \
    } v

/* ------------------------------------------------------------------------- */

#endif