AuroraRuntime/Source/Locale/Encoding/UTFn/AuUTF16.hpp
Reece 99c5e1fa65 A pretty large patch not worth breaking up into separate commits
[*] Split up Aurora Async
[*] Split Async app into seperate ThreadPool concept
[*] Fix various OSThread bugs and tls transfer issues
[*] Set default affinity to 0xFFFFFFFF
[*] Update Build script
[+] Add AuTuplePopFront
[+] New Network Interface (unimplemented)
[*] Stub out the interfaces required for a better logger
[*] Fix Win32 ShellExecute bug; windows 11 struggles without explicit com init per the docs - now deferring to thread pool
[*] Update gitignore
[*] Follow XDG home standard
[*] Refactor some namespaces to use the shorthand aliases
[*] Various stability fixes
2021-11-05 17:34:23 +00:00

53 lines
1.5 KiB
C++

/***
Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.
File: AuUTF16.hpp
Date: 2021-10-31
Author: Reece
***/
#pragma once
namespace Aurora::Locale::Encoding::UTF16
{
static void SwapU16(void *base, AuUInt32 count)
{
count *= 2;
for (int i = 0; i < count; i += 2)
{
AuWriteU16BE(base, i, AuReadU16LE(base, i));
}
}
#define AU_HIGH_SURROGATE_START 0xd800
#define AU_HIGH_SURROGATE_END 0xdbff
#define AU_LOW_SURROGATE_START 0xdc00
#define AU_LOW_SURROGATE_END 0xdfff
#define AU_IS_HIGH_SURROGATE(wch) (((wch) >= AU_HIGH_SURROGATE_START) && ((wch) <= AU_HIGH_SURROGATE_END))
#define AU_IS_LOW_SURROGATE(wch) (((wch) >= AU_LOW_SURROGATE_START) && ((wch) <= AU_LOW_SURROGATE_END))
static int GetLenUC2CodePoint(const AuUInt8 *in, AuUInt32 len)
{
if (len < 2) return 0;
auto a = *reinterpret_cast<const AuUInt16 *>(in);
if (!AU_IS_HIGH_SURROGATE(a)) return 2;
if (len < 4) return 0;
auto b = *reinterpret_cast<const AuUInt16 *>(in + 2);
return AU_IS_LOW_SURROGATE(b) ? 4 : 0;
}
static int Count16(const void *base, AuUInt32 length, bool bytes = false)
{
AuUInt32 i {}, cps {};
for (; i < length; )
{
auto next = GetLenUC2CodePoint(((const AuUInt8 *)base) + i, length - i);
if (next == 0) return i;
i += next;
cps++;
}
return bytes ? i : cps;
}
}