SkEndian.h File Reference

#include "include/private/base/SkAssert.h"
#include "include/private/base/SkFeatures.h"
#include <cstdint>

Go to the source code of this file.

Classes
struct	SkTEndianSwap16< N >
struct	SkTEndianSwap32< N >
struct	SkTEndianSwap64< N >

Macros
#define	SkEndian_SwapBE16(n)   static_cast<uint16_t>(n)
#define	SkEndian_SwapBE32(n)   static_cast<uint32_t>(n)
#define	SkEndian_SwapBE64(n)   static_cast<uint64_t>(n)
#define	SkEndian_SwapLE16(n)   SkEndianSwap16(n)
#define	SkEndian_SwapLE32(n)   SkEndianSwap32(n)
#define	SkEndian_SwapLE64(n)   SkEndianSwap64(n)
#define	SkTEndian_SwapBE16(n)   (n)
#define	SkTEndian_SwapBE32(n)   (n)
#define	SkTEndian_SwapBE64(n)   (n)
#define	SkTEndian_SwapLE16(n)   SkTEndianSwap16<n>::value
#define	SkTEndian_SwapLE32(n)   SkTEndianSwap32<n>::value
#define	SkTEndian_SwapLE64(n)   SkTEndianSwap64<n>::value
#define	SkEndian_Byte0Shift   24
#define	SkEndian_Byte1Shift   16
#define	SkEndian_Byte2Shift   8
#define	SkEndian_Byte3Shift   0
#define	SK_UINT8_BITFIELD_BENDIAN
#define	SK_UINT8_BITFIELD(f0, f1, f2, f3, f4, f5, f6, f7)

Functions
static uint16_t	SkEndianSwap16 (uint16_t value)
static void	SkEndianSwap16s (uint16_t array[], int count)
static constexpr uint32_t	SkEndianSwap32 (uint32_t value)
static void	SkEndianSwap32s (uint32_t array[], int count)
static uint64_t	SkEndianSwap64 (uint64_t value)
static void	SkEndianSwap64s (uint64_t array[], int count)

Detailed Description

Macros and helper functions for handling 16 and 32 bit values in big and little endian formats.

Definition in file SkEndian.h.

Macro Definition Documentation

SK_UINT8_BITFIELD

#define SK_UINT8_BITFIELD	(		f0,
			f1,
			f2,
			f3,
			f4,
			f5,
			f6,
			f7
	)

Value:

        SK_OT_BYTE f7 : 1; \
        SK_OT_BYTE f6 : 1; \
        SK_OT_BYTE f5 : 1; \
        SK_OT_BYTE f4 : 1; \
        SK_OT_BYTE f3 : 1; \
        SK_OT_BYTE f2 : 1; \
        SK_OT_BYTE f1 : 1; \
        SK_OT_BYTE f0 : 1;

Definition at line 188 of file SkEndian.h.

SK_UINT8_BITFIELD_BENDIAN

#define SK_UINT8_BITFIELD_BENDIAN

Definition at line 173 of file SkEndian.h.

SkEndian_Byte0Shift

#define SkEndian_Byte0Shift   24

Definition at line 158 of file SkEndian.h.

SkEndian_Byte1Shift

#define SkEndian_Byte1Shift   16

Definition at line 159 of file SkEndian.h.

SkEndian_Byte2Shift

#define SkEndian_Byte2Shift   8

Definition at line 160 of file SkEndian.h.

SkEndian_Byte3Shift

#define SkEndian_Byte3Shift   0

Definition at line 161 of file SkEndian.h.

SkEndian_SwapBE16

#define SkEndian_SwapBE16

(

n

)

static_cast<uint16_t>(n)

Definition at line 135 of file SkEndian.h.

SkEndian_SwapBE32

#define SkEndian_SwapBE32

(

n

)

static_cast<uint32_t>(n)

Definition at line 136 of file SkEndian.h.

SkEndian_SwapBE64

#define SkEndian_SwapBE64

(

n

)

static_cast<uint64_t>(n)

Definition at line 137 of file SkEndian.h.

SkEndian_SwapLE16

#define SkEndian_SwapLE16

(

n

)

SkEndianSwap16(n)

Definition at line 138 of file SkEndian.h.

SkEndian_SwapLE32

#define SkEndian_SwapLE32

(

n

)

SkEndianSwap32(n)

Definition at line 139 of file SkEndian.h.

SkEndian_SwapLE64

#define SkEndian_SwapLE64

(

n

)

SkEndianSwap64(n)

Definition at line 140 of file SkEndian.h.

SkTEndian_SwapBE16

#define SkTEndian_SwapBE16

(

n

)

(n)

Definition at line 142 of file SkEndian.h.

SkTEndian_SwapBE32

#define SkTEndian_SwapBE32

(

n

)

(n)

Definition at line 143 of file SkEndian.h.

SkTEndian_SwapBE64

#define SkTEndian_SwapBE64

(

n

)

(n)

Definition at line 144 of file SkEndian.h.

SkTEndian_SwapLE16

#define SkTEndian_SwapLE16

(

n

)

SkTEndianSwap16<n>::value

Definition at line 145 of file SkEndian.h.

SkTEndian_SwapLE32

#define SkTEndian_SwapLE32

(

n

)

SkTEndianSwap32<n>::value

Definition at line 146 of file SkEndian.h.

SkTEndian_SwapLE64

#define SkTEndian_SwapLE64

(

n

)

SkTEndianSwap64<n>::value

Definition at line 147 of file SkEndian.h.

Function Documentation

SkEndianSwap16()

static uint16_t SkEndianSwap16 ( uint16_t  value )

inlinestatic

Swap the two bytes in the low 16bits of the parameters. e.g. 0x1234 -> 0x3412

Definition at line 33 of file SkEndian.h.

                                                      {
    return static_cast<uint16_t>((value >> 8) | ((value & 0xFF) << 8));
}

SkEndianSwap16s()

static void SkEndianSwap16s ( uint16_t  array[], int  count  )

inlinestatic

Vector version of SkEndianSwap16(), which swaps the low two bytes of each value in the array.

Definition at line 44 of file SkEndian.h.

                                                                {
    SkASSERT(count == 0 || array != nullptr);
 
    while (--count >= 0) {
        *array = SkEndianSwap16(*array);
        array += 1;
    }
}

SkEndianSwap32()

static constexpr uint32_t SkEndianSwap32 ( uint32_t  value )

staticconstexpr

Reverse all 4 bytes in a 32bit value. e.g. 0x12345678 -> 0x78563412

Definition at line 56 of file SkEndian.h.

                                                         {
    return ((value & 0xFF) << 24) |
           ((value & 0xFF00) << 8) |
           ((value & 0xFF0000) >> 8) |
            (value >> 24);
}

SkEndianSwap32s()

static void SkEndianSwap32s ( uint32_t  array[], int  count  )

inlinestatic

Vector version of SkEndianSwap32(), which swaps the bytes of each value in the array.

Definition at line 73 of file SkEndian.h.

                                                                {
    SkASSERT(count == 0 || array != nullptr);
 
    while (--count >= 0) {
        *array = SkEndianSwap32(*array);
        array += 1;
    }
}

SkEndianSwap64()

static uint64_t SkEndianSwap64 ( uint64_t  value )

inlinestatic

Reverse all 8 bytes in a 64bit value. e.g. 0x1122334455667788 -> 0x8877665544332211

Definition at line 85 of file SkEndian.h.

                                                      {
    return (((value & 0x00000000000000FFULL) << (8*7)) |
            ((value & 0x000000000000FF00ULL) << (8*5)) |
            ((value & 0x0000000000FF0000ULL) << (8*3)) |
            ((value & 0x00000000FF000000ULL) << (8*1)) |
            ((value & 0x000000FF00000000ULL) >> (8*1)) |
            ((value & 0x0000FF0000000000ULL) >> (8*3)) |
            ((value & 0x00FF000000000000ULL) >> (8*5)) |
            ((value)                         >> (8*7)));
}

SkEndianSwap64s()

static void SkEndianSwap64s ( uint64_t  array[], int  count  )

inlinestatic

Vector version of SkEndianSwap64(), which swaps the bytes of each value in the array.

Definition at line 109 of file SkEndian.h.

                                                                {
    SkASSERT(count == 0 || array != nullptr);
 
    while (--count >= 0) {
        *array = SkEndianSwap64(*array);
        array += 1;
    }
}