mirror of
https://github.com/matrix-construct/construct
synced 2024-11-05 05:18:54 +01:00
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
#pragma once
|
|
#define HAVE_IRCD_UTF_H
|
|
|
|
/// Unicode Transformation Format
|
|
namespace ircd::utf
|
|
{
|
|
IRCD_EXCEPTION(ircd::error, error)
|
|
}
|
|
|
|
/// Unicode Transformation Format (8-bit)
|
|
namespace ircd::utf8
|
|
{
|
|
// Get the utf8-encoded length from char32_t (decoded) codepoints
|
|
u32x16 length(const u32x16 codepoints) noexcept;
|
|
u32x8 length(const u32x8 codepoints) noexcept;
|
|
u32x4 length(const u32x4 codepoints) noexcept;
|
|
|
|
// Encode char32_t codepoints into respective utf-8 encodings
|
|
u32x16 encode(const u32x16 codepoints) noexcept;
|
|
u32x8 encode(const u32x8 codepoints) noexcept;
|
|
u32x4 encode(const u32x4 codepoints) noexcept;
|
|
|
|
// Decode utf-8 string into char32_t unicode codepoints
|
|
u32x16 decode(const u8x16 string) noexcept;
|
|
}
|
|
|
|
/// Unicode Transformation Format (16-bit)
|
|
namespace ircd::utf16
|
|
{
|
|
// mask all surrogate characters from find_() result
|
|
u8x16 mask_surrogate(const u8x16 found) noexcept;
|
|
|
|
// scan for utf-16 surrogates
|
|
u8x16 find_surrogate(const u8x16 input) noexcept;
|
|
|
|
// scan for utf-16 surrogates including incomplete sequences truncated
|
|
u8x16 find_surrogate_partial(const u8x16 input) noexcept;
|
|
|
|
// decodes one or two surrogates at the front into one or two codepoints
|
|
u32x4 decode_surrogate_aligned_next(const u8x16 input) noexcept;
|
|
}
|
|
|
|
inline ircd::u8x16
|
|
ircd::utf16::mask_surrogate(const u8x16 found)
|
|
noexcept
|
|
{
|
|
return u8x16
|
|
{
|
|
shl<0x08>(found) |
|
|
shl<0x10>(found) |
|
|
shl<0x18>(found) |
|
|
shl<0x20>(found) |
|
|
shl<0x28>(found) |
|
|
found
|
|
};
|
|
}
|