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utf_utils.cpp
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utf_utils.cpp
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//==================================================================================================
// File: unicode_utils.cpp
//
// Copyright (c) 2018 Bob Steagall and KEWB Computing, All Rights Reserved
//==================================================================================================
//
#include "utf_utils.h"
#include <cstdio>
#if defined KEWB_PLATFORM_LINUX
#include <emmintrin.h>
#include <immintrin.h>
#include <xmmintrin.h>
#elif defined KEWB_PLATFORM_WINDOWS
#include <intrin.h>
#endif
namespace uu {
//- Static member data init.
//
UtfUtils::LookupTables const UtfUtils::smTables =
{
//- Initialize the maFirstUnitTable member array. This array implements a lookup table that
// maps the first code unit of a sequence to: 1. a pre-masked value to start the computation
// of the resulting code point; and, 2. the next state in the DFA for this code unit.
//
{
{ 0x00, BGN }, //- 0x00
{ 0x01, BGN }, //- 0x01
{ 0x02, BGN }, //- 0x02
{ 0x03, BGN }, //- 0x03
{ 0x04, BGN }, //- 0x04
{ 0x05, BGN }, //- 0x05
{ 0x06, BGN }, //- 0x06
{ 0x07, BGN }, //- 0x07
{ 0x08, BGN }, //- 0x08
{ 0x09, BGN }, //- 0x09
{ 0x0A, BGN }, //- 0x0A
{ 0x0B, BGN }, //- 0x0B
{ 0x0C, BGN }, //- 0x0C
{ 0x0D, BGN }, //- 0x0D
{ 0x0E, BGN }, //- 0x0E
{ 0x0F, BGN }, //- 0x0F
{ 0x10, BGN }, //- 0x10
{ 0x11, BGN }, //- 0x11
{ 0x12, BGN }, //- 0x12
{ 0x13, BGN }, //- 0x13
{ 0x14, BGN }, //- 0x14
{ 0x15, BGN }, //- 0x15
{ 0x16, BGN }, //- 0x16
{ 0x17, BGN }, //- 0x17
{ 0x18, BGN }, //- 0x18
{ 0x19, BGN }, //- 0x19
{ 0x1A, BGN }, //- 0x1A
{ 0x1B, BGN }, //- 0x1B
{ 0x1C, BGN }, //- 0x1C
{ 0x1D, BGN }, //- 0x1D
{ 0x1E, BGN }, //- 0x1E
{ 0x1F, BGN }, //- 0x1F
{ 0x20, BGN }, //- 0x20
{ 0x21, BGN }, //- 0x21
{ 0x22, BGN }, //- 0x22
{ 0x23, BGN }, //- 0x23
{ 0x24, BGN }, //- 0x24
{ 0x25, BGN }, //- 0x25
{ 0x26, BGN }, //- 0x26
{ 0x27, BGN }, //- 0x27
{ 0x28, BGN }, //- 0x28
{ 0x29, BGN }, //- 0x29
{ 0x2A, BGN }, //- 0x2A
{ 0x2B, BGN }, //- 0x2B
{ 0x2C, BGN }, //- 0x2C
{ 0x2D, BGN }, //- 0x2D
{ 0x2E, BGN }, //- 0x2E
{ 0x2F, BGN }, //- 0x2F
{ 0x30, BGN }, //- 0x30
{ 0x31, BGN }, //- 0x31
{ 0x32, BGN }, //- 0x32
{ 0x33, BGN }, //- 0x33
{ 0x34, BGN }, //- 0x34
{ 0x35, BGN }, //- 0x35
{ 0x36, BGN }, //- 0x36
{ 0x37, BGN }, //- 0x37
{ 0x38, BGN }, //- 0x38
{ 0x39, BGN }, //- 0x39
{ 0x3A, BGN }, //- 0x3A
{ 0x3B, BGN }, //- 0x3B
{ 0x3C, BGN }, //- 0x3C
{ 0x3D, BGN }, //- 0x3D
{ 0x3E, BGN }, //- 0x3E
{ 0x3F, BGN }, //- 0x3F
{ 0x40, BGN }, //- 0x40
{ 0x41, BGN }, //- 0x41
{ 0x42, BGN }, //- 0x42
{ 0x43, BGN }, //- 0x43
{ 0x44, BGN }, //- 0x44
{ 0x45, BGN }, //- 0x45
{ 0x46, BGN }, //- 0x46
{ 0x47, BGN }, //- 0x47
{ 0x48, BGN }, //- 0x48
{ 0x49, BGN }, //- 0x49
{ 0x4A, BGN }, //- 0x4A
{ 0x4B, BGN }, //- 0x4B
{ 0x4C, BGN }, //- 0x4C
{ 0x4D, BGN }, //- 0x4D
{ 0x4E, BGN }, //- 0x4E
{ 0x4F, BGN }, //- 0x4F
{ 0x50, BGN }, //- 0x50
{ 0x51, BGN }, //- 0x51
{ 0x52, BGN }, //- 0x52
{ 0x53, BGN }, //- 0x53
{ 0x54, BGN }, //- 0x54
{ 0x55, BGN }, //- 0x55
{ 0x56, BGN }, //- 0x56
{ 0x57, BGN }, //- 0x57
{ 0x58, BGN }, //- 0x58
{ 0x59, BGN }, //- 0x59
{ 0x5A, BGN }, //- 0x5A
{ 0x5B, BGN }, //- 0x5B
{ 0x5C, BGN }, //- 0x5C
{ 0x5D, BGN }, //- 0x5D
{ 0x5E, BGN }, //- 0x5E
{ 0x5F, BGN }, //- 0x5F
{ 0x60, BGN }, //- 0x60
{ 0x61, BGN }, //- 0x61
{ 0x62, BGN }, //- 0x62
{ 0x63, BGN }, //- 0x63
{ 0x64, BGN }, //- 0x64
{ 0x65, BGN }, //- 0x65
{ 0x66, BGN }, //- 0x66
{ 0x67, BGN }, //- 0x67
{ 0x68, BGN }, //- 0x68
{ 0x69, BGN }, //- 0x69
{ 0x6A, BGN }, //- 0x6A
{ 0x6B, BGN }, //- 0x6B
{ 0x6C, BGN }, //- 0x6C
{ 0x6D, BGN }, //- 0x6D
{ 0x6E, BGN }, //- 0x6E
{ 0x6F, BGN }, //- 0x6F
{ 0x70, BGN }, //- 0x70
{ 0x71, BGN }, //- 0x71
{ 0x72, BGN }, //- 0x72
{ 0x73, BGN }, //- 0x73
{ 0x74, BGN }, //- 0x74
{ 0x75, BGN }, //- 0x75
{ 0x76, BGN }, //- 0x76
{ 0x77, BGN }, //- 0x77
{ 0x78, BGN }, //- 0x78
{ 0x79, BGN }, //- 0x79
{ 0x7A, BGN }, //- 0x7A
{ 0x7B, BGN }, //- 0x7B
{ 0x7C, BGN }, //- 0x7C
{ 0x7D, BGN }, //- 0x7D
{ 0x7E, BGN }, //- 0x7E
{ 0x7F, BGN }, //- 0x7F
{ 0x00, ERR }, //- 0x80
{ 0x01, ERR }, //- 0x81
{ 0x02, ERR }, //- 0x82
{ 0x03, ERR }, //- 0x83
{ 0x04, ERR }, //- 0x84
{ 0x05, ERR }, //- 0x85
{ 0x06, ERR }, //- 0x86
{ 0x07, ERR }, //- 0x87
{ 0x08, ERR }, //- 0x88
{ 0x09, ERR }, //- 0x89
{ 0x0A, ERR }, //- 0x8A
{ 0x0B, ERR }, //- 0x8B
{ 0x0C, ERR }, //- 0x8C
{ 0x0D, ERR }, //- 0x8D
{ 0x0E, ERR }, //- 0x8E
{ 0x0F, ERR }, //- 0x8F
{ 0x10, ERR }, //- 0x90
{ 0x11, ERR }, //- 0x91
{ 0x12, ERR }, //- 0x92
{ 0x13, ERR }, //- 0x93
{ 0x14, ERR }, //- 0x94
{ 0x15, ERR }, //- 0x95
{ 0x16, ERR }, //- 0x96
{ 0x17, ERR }, //- 0x97
{ 0x18, ERR }, //- 0x98
{ 0x19, ERR }, //- 0x99
{ 0x1A, ERR }, //- 0x9A
{ 0x1B, ERR }, //- 0x9B
{ 0x1C, ERR }, //- 0x9C
{ 0x1D, ERR }, //- 0x9D
{ 0x1E, ERR }, //- 0x9E
{ 0x1F, ERR }, //- 0x9F
{ 0x20, ERR }, //- 0xA0
{ 0x21, ERR }, //- 0xA1
{ 0x22, ERR }, //- 0xA2
{ 0x23, ERR }, //- 0xA3
{ 0x24, ERR }, //- 0xA4
{ 0x25, ERR }, //- 0xA5
{ 0x26, ERR }, //- 0xA6
{ 0x27, ERR }, //- 0xA7
{ 0x28, ERR }, //- 0xA8
{ 0x29, ERR }, //- 0xA9
{ 0x2A, ERR }, //- 0xAA
{ 0x2B, ERR }, //- 0xAB
{ 0x2C, ERR }, //- 0xAC
{ 0x2D, ERR }, //- 0xAD
{ 0x2E, ERR }, //- 0xAE
{ 0x2F, ERR }, //- 0xAF
{ 0x30, ERR }, //- 0xB0
{ 0x31, ERR }, //- 0xB1
{ 0x32, ERR }, //- 0xB2
{ 0x33, ERR }, //- 0xB3
{ 0x34, ERR }, //- 0xB4
{ 0x35, ERR }, //- 0xB5
{ 0x36, ERR }, //- 0xB6
{ 0x37, ERR }, //- 0xB7
{ 0x38, ERR }, //- 0xB8
{ 0x39, ERR }, //- 0xB9
{ 0x3A, ERR }, //- 0xBA
{ 0x3B, ERR }, //- 0xBB
{ 0x3C, ERR }, //- 0xBC
{ 0x3D, ERR }, //- 0xBD
{ 0x3E, ERR }, //- 0xBE
{ 0x3F, ERR }, //- 0xBF
{ 0xC0, ERR }, //- 0xC0
{ 0xC1, ERR }, //- 0xC1
{ 0x02, CS1 }, //- 0xC2
{ 0x03, CS1 }, //- 0xC3
{ 0x04, CS1 }, //- 0xC4
{ 0x05, CS1 }, //- 0xC5
{ 0x06, CS1 }, //- 0xC6
{ 0x07, CS1 }, //- 0xC7
{ 0x08, CS1 }, //- 0xC8
{ 0x09, CS1 }, //- 0xC9
{ 0x0A, CS1 }, //- 0xCA
{ 0x0B, CS1 }, //- 0xCB
{ 0x0C, CS1 }, //- 0xCC
{ 0x0D, CS1 }, //- 0xCD
{ 0x0E, CS1 }, //- 0xCE
{ 0x0F, CS1 }, //- 0xCF
{ 0x10, CS1 }, //- 0xD0
{ 0x11, CS1 }, //- 0xD1
{ 0x12, CS1 }, //- 0xD2
{ 0x13, CS1 }, //- 0xD3
{ 0x14, CS1 }, //- 0xD4
{ 0x15, CS1 }, //- 0xD5
{ 0x16, CS1 }, //- 0xD6
{ 0x17, CS1 }, //- 0xD7
{ 0x18, CS1 }, //- 0xD8
{ 0x19, CS1 }, //- 0xD9
{ 0x1A, CS1 }, //- 0xDA
{ 0x1B, CS1 }, //- 0xDB
{ 0x1C, CS1 }, //- 0xDC
{ 0x1D, CS1 }, //- 0xDD
{ 0x1E, CS1 }, //- 0xDE
{ 0x1F, CS1 }, //- 0xDF
{ 0x00, P3A }, //- 0xE0
{ 0x01, CS2 }, //- 0xE1
{ 0x02, CS2 }, //- 0xE2
{ 0x03, CS2 }, //- 0xE3
{ 0x04, CS2 }, //- 0xE4
{ 0x05, CS2 }, //- 0xE5
{ 0x06, CS2 }, //- 0xE6
{ 0x07, CS2 }, //- 0xE7
{ 0x08, CS2 }, //- 0xE8
{ 0x09, CS2 }, //- 0xE9
{ 0x0A, CS2 }, //- 0xEA
{ 0x0B, CS2 }, //- 0xEB
{ 0x0C, CS2 }, //- 0xEC
{ 0x0D, P3B }, //- 0xED
{ 0x0E, CS2 }, //- 0xEE
{ 0x0F, CS2 }, //- 0xEF
{ 0x00, P4A }, //- 0xF0
{ 0x01, CS3 }, //- 0xF1
{ 0x02, CS3 }, //- 0xF2
{ 0x03, CS3 }, //- 0xF3
{ 0x04, P4B }, //- 0xF4
{ 0xF5, ERR }, //- 0xF5
{ 0xF6, ERR }, //- 0xF6
{ 0xF7, ERR }, //- 0xF7
{ 0xF8, ERR }, //- 0xF8
{ 0xF9, ERR }, //- 0xF9
{ 0xFA, ERR }, //- 0xFA
{ 0xFB, ERR }, //- 0xFB
{ 0xFC, ERR }, //- 0xFC
{ 0xFD, ERR }, //- 0xFD
{ 0xFE, ERR }, //- 0xFE
{ 0xFF, ERR }, //- 0xFF
},
//- Initialize the maOctetCategory member array. This array implements a lookup table
// that maps an input octet to a corresponding octet category.
//
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
//============================================================================================
{
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 00..0F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 10..1F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 20..2F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 30..3F
//
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 40..4F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 50..5F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 60..6F
ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC, //- 70..7F
//
CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, CR1, //- 80..8F
CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, CR2, //- 90..9F
CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, //- A0..AF
CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, CR3, //- B0..BF
//
ILL, ILL, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, //- C0..CF
L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, L2A, //- D0..DF
L3A, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3B, L3C, L3B, L3B, //- E0..EF
L4A, L4B, L4B, L4B, L4C, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL, //- F0..FF
},
//- Initialize the maTransitions member array. This array implements a lookup table that,
// given the current DFA state and an input code unit, indicates the next DFA state.
//
// ILL ASC CR1 CR2 CR3 L2A L3A L3B L3C L4A L4B L4C CLASS/STATE
//=========================================================================
{
err, END, err, err, err, CS1, P3A, CS2, P3B, P4A, CS3, P4B, //- BGN|END
err, err, err, err, err, err, err, err, err, err, err, err, //- ERR
//
err, err, END, END, END, err, err, err, err, err, err, err, //- CS1
err, err, CS1, CS1, CS1, err, err, err, err, err, err, err, //- CS2
err, err, CS2, CS2, CS2, err, err, err, err, err, err, err, //- CS3
//
err, err, err, err, CS1, err, err, err, err, err, err, err, //- P3A
err, err, CS1, CS1, err, err, err, err, err, err, err, err, //- P3B
//
err, err, err, CS2, CS2, err, err, err, err, err, err, err, //- P4A
err, err, CS2, err, err, err, err, err, err, err, err, err, //- P4B
},
//- Initialize the maFirstOctetMask member array. This array implements a lookup table that
// maps a character class to a mask that is applied to the first code unit in a sequence.
//
{
0xFF, //- ILL - C0..C1, F5..FF Illegal code unit
//
0x7F, //- ASC - 00..7F ASCII byte range
//
0x3F, //- CR1 - 80..8F Continuation range 1
0x3F, //- CR2 - 90..9F Continuation range 2
0x3F, //- CR3 - A0..BF Continuation range 3
//
0x1F, //- L2A - C2..DF Leading byte range 2A / 2-byte sequence
//
0x0F, //- L3A - E0 Leading byte range 3A / 3-byte sequence
0x0F, //- L3B - E1..EC, EE..EF Leading byte range 3B / 3-byte sequence
0x0F, //- L3C - ED Leading byte range 3C / 3-byte sequence
//
0x07, //- L4A - F0 Leading byte range 4A / 4-byte sequence
0x07, //- L4B - F1..F3 Leading byte range 4B / 4-byte sequence
0x07, //- L4C - F4 Leading byte range 4C / 4-byte sequence
},
};
//- These are the human-readable names assigned to the code unit categories.
//
char const* UtfUtils::smClassNames[12] =
{
"ILL", "ASC", "CR1", "CR2", "CR3", "L2A", "L3A", "L3B", "L3C", "L4A", "L4B", "L4C",
};
//- These are the human-readable names assigned to the various states comprising the DFA.
//
char const* UtfUtils::smStateNames[9] =
{
"BGN", "ERR", "CS1", "CS2", "CS3", "P3A", "P3B", "P4A", "P4B",
};
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It performs conversion by traversing
/// the DFA without any optimizations using the `AdvanceWithBigTable` member function to
/// read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::BasicBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by checking for ASCII code units and
/// converting them directly to code points. It uses the `AdvanceWithBigTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::FastBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by converting contiguous sequences of
/// ASCII code units using SSE intrinsics. It uses the `AdvanceWithBigTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::SseBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < (pSrcEnd - sizeof(__m128i)))
{
if (*pSrc < 0x80)
{
ConvertAsciiWithSse(pSrc, pDst);
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code units. It performs conversion by traversing
/// the DFA without any optimizations using the `AdvanceWithBigTable` member function to
/// read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::BasicBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code unis. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by checking for ASCII code units and
/// converting them directly to code points. It uses the `AdvanceWithBigTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::FastBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code units. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by converting contiguous sequences of
/// ASCII code units using SSE intrinsics. It uses the `AdvanceWithBigTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::SseBigTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < (pSrcEnd - sizeof(__m128i)))
{
if (*pSrc < 0x80)
{
ConvertAsciiWithSse(pSrc, pDst);
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
}
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithBigTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It performs conversion by traversing
/// the DFA without any optimizations using the `AdvanceWithSmallTable` member function to
/// read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::BasicSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by checking for ASCII code units and
/// converting them directly to code points. It uses the `AdvanceWithSmallTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::FastSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-32 code points.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-32 code points. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by converting contiguous sequences of
/// ASCII code units using SSE intrinsics. It uses the `AdvanceWithSmallTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code point output range.
///
/// \returns
/// If successful, the number of UTF-32 code points written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::SseSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char32_t* pDst) noexcept
{
char32_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < (pSrcEnd - sizeof(__m128i)))
{
if (*pSrc < 0x80)
{
ConvertAsciiWithSse(pSrc, pDst);
}
else
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
*pDst++ = cdpt;
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code units. It performs conversion by traversing
/// the DFA without any optimizations using the `AdvanceWithSmallTable` member function to
/// read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::BasicSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code unis. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by checking for ASCII code units and
/// converting them directly to code points. It uses the `AdvanceWithSmallTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::FastSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < pSrcEnd)
{
if (*pSrc < 0x80)
{
*pDst++ = *pSrc++;
}
else
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}
else
{
return -1;
}
}
}
return pDst - pDstOrig;
}
//--------------------------------------------------------------------------------------------------
/// \brief Converts a sequence of UTF-8 code units to a sequence of UTF-16 code units.
///
/// \details
/// This static member function reads an input sequence of UTF-8 code units and converts
/// it to an output sequence of UTF-16 code units. It uses the DFA to perform non-ascii
/// code-unit sequence conversions, but optimizes by converting contiguous sequences of
/// ASCII code units using SSE intrinsics. It uses the `AdvanceWithSmallTable` member
/// function to read and convert input.
///
/// \param pSrc
/// A non-null pointer defining the beginning of the code unit input range.
/// \param pSrcEnd
/// A non-null past-the-end pointer defining the end of the code unit input range.
/// \param pDst
/// A non-null pointer defining the beginning of the code unit output range.
///
/// \returns
/// If successful, the number of UTF-16 code units written; otherwise -1 is returned to
/// indicate an error was encountered.
//--------------------------------------------------------------------------------------------------
//
KEWB_ALIGN_FN std::ptrdiff_t
UtfUtils::SseSmallTableConvert(char8_t const* pSrc, char8_t const* pSrcEnd, char16_t* pDst) noexcept
{
char16_t* pDstOrig = pDst;
char32_t cdpt;
while (pSrc < (pSrcEnd - sizeof(__m128i)))
{
if (*pSrc < 0x80)
{
ConvertAsciiWithSse(pSrc, pDst);
}
else
{
if (AdvanceWithSmallTable(pSrc, pSrcEnd, cdpt) != ERR)
{
GetCodeUnits(cdpt, pDst);
}