/*

 * This file is part of Libav.

 *

 * Libav is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * Libav is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef AVUTIL_INTREADWRITE_H

#define AVUTIL_INTREADWRITE_H

#include <stdint.h>

#include "libavutil/avconfig.h"

#include "attributes.h"

#include "bswap.h"

typedef union {

    uint64_t u64;

    uint32_t u32[2];

    uint16_t u16[4];

    uint8_t  u8 [8];

    double   f64;

    float    f32[2];

} av_alias av_alias64;

typedef union {

    uint32_t u32;

    uint16_t u16[2];

    uint8_t  u8 [4];

    float    f32;

} av_alias av_alias32;

typedef union {

    uint16_t u16;

    uint8_t  u8 [2];

} av_alias av_alias16;

/*

 * Arch-specific headers can provide any combination of

 * AV_[RW][BLN](16|24|32|64) and AV_(COPY|SWAP|ZERO)(64|128) macros.

 * Preprocessor symbols must be defined, even if these are implemented

 * as inline functions.

 */

#ifdef HAVE_AV_CONFIG_H

#include "config.h"

#if   ARCH_ARM

#   include "arm/intreadwrite.h"

#elif ARCH_AVR32

#   include "avr32/intreadwrite.h"

#elif ARCH_MIPS

#   include "mips/intreadwrite.h"

#elif ARCH_PPC

#   include "ppc/intreadwrite.h"

#elif ARCH_TOMI

#   include "tomi/intreadwrite.h"

#elif ARCH_X86

#   include "x86/intreadwrite.h"

#endif

#endif /* HAVE_AV_CONFIG_H */

/*

 * Map AV_RNXX <-> AV_R[BL]XX for all variants provided by per-arch headers.

 */

#if AV_HAVE_BIGENDIAN

#   if    defined(AV_RN16) && !defined(AV_RB16)

#       define AV_RB16(p) AV_RN16(p)

#   elif !defined(AV_RN16) &&  defined(AV_RB16)

#       define AV_RN16(p) AV_RB16(p)

#   endif

#   if    defined(AV_WN16) && !defined(AV_WB16)

#       define AV_WB16(p, v) AV_WN16(p, v)

#   elif !defined(AV_WN16) &&  defined(AV_WB16)

#       define AV_WN16(p, v) AV_WB16(p, v)

#   endif

#   if    defined(AV_RN24) && !defined(AV_RB24)

#       define AV_RB24(p) AV_RN24(p)

#   elif !defined(AV_RN24) &&  defined(AV_RB24)

#       define AV_RN24(p) AV_RB24(p)

#   endif

#   if    defined(AV_WN24) && !defined(AV_WB24)

#       define AV_WB24(p, v) AV_WN24(p, v)

#   elif !defined(AV_WN24) &&  defined(AV_WB24)

#       define AV_WN24(p, v) AV_WB24(p, v)

#   endif

#   if    defined(AV_RN32) && !defined(AV_RB32)

#       define AV_RB32(p) AV_RN32(p)

#   elif !defined(AV_RN32) &&  defined(AV_RB32)

#       define AV_RN32(p) AV_RB32(p)

#   endif

#   if    defined(AV_WN32) && !defined(AV_WB32)

#       define AV_WB32(p, v) AV_WN32(p, v)

#   elif !defined(AV_WN32) &&  defined(AV_WB32)

#       define AV_WN32(p, v) AV_WB32(p, v)

#   endif

#   if    defined(AV_RN64) && !defined(AV_RB64)

#       define AV_RB64(p) AV_RN64(p)

#   elif !defined(AV_RN64) &&  defined(AV_RB64)

#       define AV_RN64(p) AV_RB64(p)

#   endif

#   if    defined(AV_WN64) && !defined(AV_WB64)

#       define AV_WB64(p, v) AV_WN64(p, v)

#   elif !defined(AV_WN64) &&  defined(AV_WB64)

#       define AV_WN64(p, v) AV_WB64(p, v)

#   endif

#else /* AV_HAVE_BIGENDIAN */

#   if    defined(AV_RN16) && !defined(AV_RL16)

#       define AV_RL16(p) AV_RN16(p)

#   elif !defined(AV_RN16) &&  defined(AV_RL16)

#       define AV_RN16(p) AV_RL16(p)

#   endif

#   if    defined(AV_WN16) && !defined(AV_WL16)

#       define AV_WL16(p, v) AV_WN16(p, v)

#   elif !defined(AV_WN16) &&  defined(AV_WL16)

#       define AV_WN16(p, v) AV_WL16(p, v)

#   endif

#   if    defined(AV_RN24) && !defined(AV_RL24)

#       define AV_RL24(p) AV_RN24(p)

#   elif !defined(AV_RN24) &&  defined(AV_RL24)

#       define AV_RN24(p) AV_RL24(p)

#   endif

#   if    defined(AV_WN24) && !defined(AV_WL24)

#       define AV_WL24(p, v) AV_WN24(p, v)

#   elif !defined(AV_WN24) &&  defined(AV_WL24)

#       define AV_WN24(p, v) AV_WL24(p, v)

#   endif

#   if    defined(AV_RN32) && !defined(AV_RL32)

#       define AV_RL32(p) AV_RN32(p)

#   elif !defined(AV_RN32) &&  defined(AV_RL32)

#       define AV_RN32(p) AV_RL32(p)

#   endif

#   if    defined(AV_WN32) && !defined(AV_WL32)

#       define AV_WL32(p, v) AV_WN32(p, v)

#   elif !defined(AV_WN32) &&  defined(AV_WL32)

#       define AV_WN32(p, v) AV_WL32(p, v)

#   endif

#   if    defined(AV_RN64) && !defined(AV_RL64)

#       define AV_RL64(p) AV_RN64(p)

#   elif !defined(AV_RN64) &&  defined(AV_RL64)

#       define AV_RN64(p) AV_RL64(p)

#   endif

#   if    defined(AV_WN64) && !defined(AV_WL64)

#       define AV_WL64(p, v) AV_WN64(p, v)

#   elif !defined(AV_WN64) &&  defined(AV_WL64)

#       define AV_WN64(p, v) AV_WL64(p, v)

#   endif

#endif /* !AV_HAVE_BIGENDIAN */

/*

 * Define AV_[RW]N helper macros to simplify definitions not provided

 * by per-arch headers.

 */

#if defined(__GNUC__) && !defined(__TI_COMPILER_VERSION__)

union unaligned_64 { uint64_t l; } __attribute__((packed)) av_alias;

union unaligned_32 { uint32_t l; } __attribute__((packed)) av_alias;

union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias;

#   define AV_RN(s, p) (((const union unaligned_##s *) (p))->l)

#   define AV_WN(s, p, v) ((((union unaligned_##s *) (p))->l) = (v))

#elif defined(__DECC)

#   define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))

#   define AV_WN(s, p, v) (*((__unaligned uint##s##_t*)(p)) = (v))

#elif AV_HAVE_FAST_UNALIGNED

#   define AV_RN(s, p) (((const av_alias##s*)(p))->u##s)

#   define AV_WN(s, p, v) (((av_alias##s*)(p))->u##s = (v))

#else

#ifndef AV_RB16

#   define AV_RB16(x)                           \

    ((((const uint8_t*)(x))[0] << 8) |          \

      ((const uint8_t*)(x))[1])

#endif

#ifndef AV_WB16

#   define AV_WB16(p, d) do {                   \

        ((uint8_t*)(p))[1] = (d);               \

        ((uint8_t*)(p))[0] = (d)>>8;            \

    } while(0)

#endif

#ifndef AV_RL16

#   define AV_RL16(x)                           \

    ((((const uint8_t*)(x))[1] << 8) |          \

      ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL16

#   define AV_WL16(p, d) do {                   \

        ((uint8_t*)(p))[0] = (d);               \

        ((uint8_t*)(p))[1] = (d)>>8;            \

    } while(0)

#endif

#ifndef AV_RB32

#   define AV_RB32(x)                                \

    (((uint32_t)((const uint8_t*)(x))[0] << 24) |    \

               (((const uint8_t*)(x))[1] << 16) |    \

               (((const uint8_t*)(x))[2] <<  8) |    \

                ((const uint8_t*)(x))[3])

#endif

#ifndef AV_WB32

#   define AV_WB32(p, d) do {                   \

        ((uint8_t*)(p))[3] = (d);               \

        ((uint8_t*)(p))[2] = (d)>>8;            \

        ((uint8_t*)(p))[1] = (d)>>16;           \

        ((uint8_t*)(p))[0] = (d)>>24;           \

    } while(0)

#endif

#ifndef AV_RL32

#   define AV_RL32(x)                                \

    (((uint32_t)((const uint8_t*)(x))[3] << 24) |    \

               (((const uint8_t*)(x))[2] << 16) |    \

               (((const uint8_t*)(x))[1] <<  8) |    \

                ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL32

#   define AV_WL32(p, d) do {                   \

        ((uint8_t*)(p))[0] = (d);               \

        ((uint8_t*)(p))[1] = (d)>>8;            \

        ((uint8_t*)(p))[2] = (d)>>16;           \

        ((uint8_t*)(p))[3] = (d)>>24;           \

    } while(0)

#endif

#ifndef AV_RB64

#   define AV_RB64(x)                                   \

    (((uint64_t)((const uint8_t*)(x))[0] << 56) |       \

     ((uint64_t)((const uint8_t*)(x))[1] << 48) |       \

     ((uint64_t)((const uint8_t*)(x))[2] << 40) |       \

     ((uint64_t)((const uint8_t*)(x))[3] << 32) |       \

     ((uint64_t)((const uint8_t*)(x))[4] << 24) |       \

     ((uint64_t)((const uint8_t*)(x))[5] << 16) |       \

     ((uint64_t)((const uint8_t*)(x))[6] <<  8) |       \

      (uint64_t)((const uint8_t*)(x))[7])

#endif

#ifndef AV_WB64

#   define AV_WB64(p, d) do {                   \

        ((uint8_t*)(p))[7] = (d);               \

        ((uint8_t*)(p))[6] = (d)>>8;            \

        ((uint8_t*)(p))[5] = (d)>>16;           \

        ((uint8_t*)(p))[4] = (d)>>24;           \

        ((uint8_t*)(p))[3] = (d)>>32;           \

        ((uint8_t*)(p))[2] = (d)>>40;           \

        ((uint8_t*)(p))[1] = (d)>>48;           \

        ((uint8_t*)(p))[0] = (d)>>56;           \

    } while(0)

#endif

#ifndef AV_RL64

#   define AV_RL64(x)                                   \

    (((uint64_t)((const uint8_t*)(x))[7] << 56) |       \

     ((uint64_t)((const uint8_t*)(x))[6] << 48) |       \

     ((uint64_t)((const uint8_t*)(x))[5] << 40) |       \

     ((uint64_t)((const uint8_t*)(x))[4] << 32) |       \

     ((uint64_t)((const uint8_t*)(x))[3] << 24) |       \

     ((uint64_t)((const uint8_t*)(x))[2] << 16) |       \

     ((uint64_t)((const uint8_t*)(x))[1] <<  8) |       \

      (uint64_t)((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL64

#   define AV_WL64(p, d) do {                   \

        ((uint8_t*)(p))[0] = (d);               \

        ((uint8_t*)(p))[1] = (d)>>8;            \

        ((uint8_t*)(p))[2] = (d)>>16;           \

        ((uint8_t*)(p))[3] = (d)>>24;           \

        ((uint8_t*)(p))[4] = (d)>>32;           \

        ((uint8_t*)(p))[5] = (d)>>40;           \

        ((uint8_t*)(p))[6] = (d)>>48;           \

        ((uint8_t*)(p))[7] = (d)>>56;           \

    } while(0)

#endif

#if AV_HAVE_BIGENDIAN

#   define AV_RN(s, p)    AV_RB##s(p)

#   define AV_WN(s, p, v) AV_WB##s(p, v)

#else

#   define AV_RN(s, p)    AV_RL##s(p)

#   define AV_WN(s, p, v) AV_WL##s(p, v)

#endif

#endif /* HAVE_FAST_UNALIGNED */

#ifndef AV_RN16

#   define AV_RN16(p) AV_RN(16, p)

#endif

#ifndef AV_RN32

#   define AV_RN32(p) AV_RN(32, p)

#endif

#ifndef AV_RN64

#   define AV_RN64(p) AV_RN(64, p)

#endif

#ifndef AV_WN16

#   define AV_WN16(p, v) AV_WN(16, p, v)

#endif

#ifndef AV_WN32

#   define AV_WN32(p, v) AV_WN(32, p, v)

#endif

#ifndef AV_WN64

#   define AV_WN64(p, v) AV_WN(64, p, v)

#endif

#if AV_HAVE_BIGENDIAN

#   define AV_RB(s, p)    AV_RN##s(p)

#   define AV_WB(s, p, v) AV_WN##s(p, v)

#   define AV_RL(s, p)    av_bswap##s(AV_RN##s(p))

#   define AV_WL(s, p, v) AV_WN##s(p, av_bswap##s(v))

#else

#   define AV_RB(s, p)    av_bswap##s(AV_RN##s(p))

#   define AV_WB(s, p, v) AV_WN##s(p, av_bswap##s(v))

#   define AV_RL(s, p)    AV_RN##s(p)

#   define AV_WL(s, p, v) AV_WN##s(p, v)

#endif

#define AV_RB8(x)     (((const uint8_t*)(x))[0])

#define AV_WB8(p, d)  do { ((uint8_t*)(p))[0] = (d); } while(0)

#define AV_RL8(x)     AV_RB8(x)

#define AV_WL8(p, d)  AV_WB8(p, d)

#ifndef AV_RB16

#   define AV_RB16(p)    AV_RB(16, p)

#endif

#ifndef AV_WB16

#   define AV_WB16(p, v) AV_WB(16, p, v)

#endif

#ifndef AV_RL16

#   define AV_RL16(p)    AV_RL(16, p)

#endif

#ifndef AV_WL16

#   define AV_WL16(p, v) AV_WL(16, p, v)

#endif

#ifndef AV_RB32

#   define AV_RB32(p)    AV_RB(32, p)

#endif

#ifndef AV_WB32

#   define AV_WB32(p, v) AV_WB(32, p, v)

#endif

#ifndef AV_RL32

#   define AV_RL32(p)    AV_RL(32, p)

#endif

#ifndef AV_WL32

#   define AV_WL32(p, v) AV_WL(32, p, v)

#endif

#ifndef AV_RB64

#   define AV_RB64(p)    AV_RB(64, p)

#endif

#ifndef AV_WB64

#   define AV_WB64(p, v) AV_WB(64, p, v)

#endif

#ifndef AV_RL64

#   define AV_RL64(p)    AV_RL(64, p)

#endif

#ifndef AV_WL64

#   define AV_WL64(p, v) AV_WL(64, p, v)

#endif

#ifndef AV_RB24

#   define AV_RB24(x)                           \

    ((((const uint8_t*)(x))[0] << 16) |         \

     (((const uint8_t*)(x))[1] <<  8) |         \

      ((const uint8_t*)(x))[2])

#endif

#ifndef AV_WB24

#   define AV_WB24(p, d) do {                   \

        ((uint8_t*)(p))[2] = (d);               \

        ((uint8_t*)(p))[1] = (d)>>8;            \

        ((uint8_t*)(p))[0] = (d)>>16;           \

    } while(0)

#endif

#ifndef AV_RL24

#   define AV_RL24(x)                           \

    ((((const uint8_t*)(x))[2] << 16) |         \

     (((const uint8_t*)(x))[1] <<  8) |         \

      ((const uint8_t*)(x))[0])

#endif

#ifndef AV_WL24

#   define AV_WL24(p, d) do {                   \

        ((uint8_t*)(p))[0] = (d);               \

        ((uint8_t*)(p))[1] = (d)>>8;            \

        ((uint8_t*)(p))[2] = (d)>>16;           \

    } while(0)

#endif

/*

 * The AV_[RW]NA macros access naturally aligned data

 * in a type-safe way.

 */

#define AV_RNA(s, p)    (((const av_alias##s*)(p))->u##s)

#define AV_WNA(s, p, v) (((av_alias##s*)(p))->u##s = (v))

#ifndef AV_RN16A

#   define AV_RN16A(p) AV_RNA(16, p)

#endif

#ifndef AV_RN32A

#   define AV_RN32A(p) AV_RNA(32, p)

#endif

#ifndef AV_RN64A

#   define AV_RN64A(p) AV_RNA(64, p)

#endif

#ifndef AV_WN16A

#   define AV_WN16A(p, v) AV_WNA(16, p, v)

#endif

#ifndef AV_WN32A

#   define AV_WN32A(p, v) AV_WNA(32, p, v)

#endif

#ifndef AV_WN64A

#   define AV_WN64A(p, v) AV_WNA(64, p, v)

#endif

/* Parameters for AV_COPY*, AV_SWAP*, AV_ZERO* must be

 * naturally aligned. They may be implemented using MMX,

 * so emms_c() must be called before using any float code

 * afterwards.

 */

#define AV_COPY(n, d, s) \

    (((av_alias##n*)(d))->u##n = ((const av_alias##n*)(s))->u##n)

#ifndef AV_COPY16

#   define AV_COPY16(d, s) AV_COPY(16, d, s)

#endif

#ifndef AV_COPY32

#   define AV_COPY32(d, s) AV_COPY(32, d, s)

#endif

#ifndef AV_COPY64

#   define AV_COPY64(d, s) AV_COPY(64, d, s)

#endif

#ifndef AV_COPY128

#   define AV_COPY128(d, s)                    \

    do {                                       \

        AV_COPY64(d, s);                       \

        AV_COPY64((char*)(d)+8, (char*)(s)+8); \

    } while(0)

#endif

#define AV_SWAP(n, a, b) FFSWAP(av_alias##n, *(av_alias##n*)(a), *(av_alias##n*)(b))

#ifndef AV_SWAP64

#   define AV_SWAP64(a, b) AV_SWAP(64, a, b)

#endif

#define AV_ZERO(n, d) (((av_alias##n*)(d))->u##n = 0)

#ifndef AV_ZERO16

#   define AV_ZERO16(d) AV_ZERO(16, d)

#endif

#ifndef AV_ZERO32

#   define AV_ZERO32(d) AV_ZERO(32, d)

#endif

#ifndef AV_ZERO64

#   define AV_ZERO64(d) AV_ZERO(64, d)

#endif

#ifndef AV_ZERO128

#   define AV_ZERO128(d)         \

    do {                         \

        AV_ZERO64(d);            \

        AV_ZERO64((char*)(d)+8); \

    } while(0)

#endif

#endif /* AVUTIL_INTREADWRITE_H */