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Rolled back changes in Functions.
This commit is contained in:
Vladimir Chebotarev
parent
3c08a4a23b
commit
6e600df160
@ -1,302 +0,0 @@
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#pragma once
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#include <Core/Types.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#ifdef __SSE4_1__
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# include <emmintrin.h>
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# include <smmintrin.h>
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# include <tmmintrin.h>
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#endif
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namespace DB
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{
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struct ValidUTF8Impl
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{
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/// inspired by https://github.com/cyb70289/utf8/
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/*
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MIT License
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Copyright (c) 2019 Yibo Cai
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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/*
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* http://www.unicode.org/versions/Unicode6.0.0/ch03.pdf - page 94
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*
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* Table 3-7. Well-Formed UTF-8 Byte Sequences
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*
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* +--------------------+------------+-------------+------------+-------------+
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* | Code Points | First Byte | Second Byte | Third Byte | Fourth Byte |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+0000..U+007F | 00..7F | | | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+0080..U+07FF | C2..DF | 80..BF | | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+0800..U+0FFF | E0 | A0..BF | 80..BF | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+1000..U+CFFF | E1..EC | 80..BF | 80..BF | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+D000..U+D7FF | ED | 80..9F | 80..BF | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+E000..U+FFFF | EE..EF | 80..BF | 80..BF | |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+10000..U+3FFFF | F0 | 90..BF | 80..BF | 80..BF |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+40000..U+FFFFF | F1..F3 | 80..BF | 80..BF | 80..BF |
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* +--------------------+------------+-------------+------------+-------------+
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* | U+100000..U+10FFFF | F4 | 80..8F | 80..BF | 80..BF |
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* +--------------------+------------+-------------+------------+-------------+
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*/
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static inline UInt8 isValidUTF8Naive(const UInt8 * data, UInt64 len)
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{
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while (len)
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{
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int bytes;
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const UInt8 byte1 = data[0];
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/* 00..7F */
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if (byte1 <= 0x7F)
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{
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bytes = 1;
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}
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/* C2..DF, 80..BF */
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else if (len >= 2 && byte1 >= 0xC2 && byte1 <= 0xDF && static_cast<Int8>(data[1]) <= static_cast<Int8>(0xBF))
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{
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bytes = 2;
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}
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else if (len >= 3)
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{
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const UInt8 byte2 = data[1];
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bool byte2_ok = static_cast<Int8>(byte2) <= static_cast<Int8>(0xBF);
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bool byte3_ok = static_cast<Int8>(data[2]) <= static_cast<Int8>(0xBF);
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if (byte2_ok && byte3_ok &&
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/* E0, A0..BF, 80..BF */
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((byte1 == 0xE0 && byte2 >= 0xA0) ||
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/* E1..EC, 80..BF, 80..BF */
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(byte1 >= 0xE1 && byte1 <= 0xEC) ||
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/* ED, 80..9F, 80..BF */
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(byte1 == 0xED && byte2 <= 0x9F) ||
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/* EE..EF, 80..BF, 80..BF */
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(byte1 >= 0xEE && byte1 <= 0xEF)))
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{
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bytes = 3;
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}
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else if (len >= 4)
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{
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bool byte4_ok = static_cast<Int8>(data[3]) <= static_cast<Int8>(0xBF);
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if (byte2_ok && byte3_ok && byte4_ok &&
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/* F0, 90..BF, 80..BF, 80..BF */
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((byte1 == 0xF0 && byte2 >= 0x90) ||
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/* F1..F3, 80..BF, 80..BF, 80..BF */
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(byte1 >= 0xF1 && byte1 <= 0xF3) ||
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/* F4, 80..8F, 80..BF, 80..BF */
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(byte1 == 0xF4 && byte2 <= 0x8F)))
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{
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bytes = 4;
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}
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else
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{
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return false;
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}
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}
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else
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{
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return false;
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}
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}
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else
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{
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return false;
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}
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len -= bytes;
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data += bytes;
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}
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return true;
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}
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#ifndef __SSE4_1__
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static inline UInt8 isValidUTF8(const UInt8 * data, UInt64 len) { return isValidUTF8Naive(data, len); }
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#else
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static inline UInt8 isValidUTF8(const UInt8 * data, UInt64 len)
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{
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/*
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* Map high nibble of "First Byte" to legal character length minus 1
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* 0x00 ~ 0xBF --> 0
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* 0xC0 ~ 0xDF --> 1
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* 0xE0 ~ 0xEF --> 2
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* 0xF0 ~ 0xFF --> 3
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*/
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const __m128i first_len_tbl = _mm_setr_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3);
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/* Map "First Byte" to 8-th item of range table (0xC2 ~ 0xF4) */
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const __m128i first_range_tbl = _mm_setr_epi8(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8);
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/*
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* Range table, map range index to min and max values
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*/
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const __m128i range_min_tbl
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= _mm_setr_epi8(0x00, 0x80, 0x80, 0x80, 0xA0, 0x80, 0x90, 0x80, 0xC2, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F);
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const __m128i range_max_tbl
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= _mm_setr_epi8(0x7F, 0xBF, 0xBF, 0xBF, 0xBF, 0x9F, 0xBF, 0x8F, 0xF4, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80);
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/*
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* Tables for fast handling of four special First Bytes(E0,ED,F0,F4), after
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* which the Second Byte are not 80~BF. It contains "range index adjustment".
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* +------------+---------------+------------------+----------------+
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* | First Byte | original range| range adjustment | adjusted range |
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* +------------+---------------+------------------+----------------+
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* | E0 | 2 | 2 | 4 |
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* +------------+---------------+------------------+----------------+
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* | ED | 2 | 3 | 5 |
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* +------------+---------------+------------------+----------------+
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* | F0 | 3 | 3 | 6 |
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* +------------+---------------+------------------+----------------+
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* | F4 | 4 | 4 | 8 |
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* +------------+---------------+------------------+----------------+
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*/
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/* index1 -> E0, index14 -> ED */
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const __m128i df_ee_tbl = _mm_setr_epi8(0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0);
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/* index1 -> F0, index5 -> F4 */
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const __m128i ef_fe_tbl = _mm_setr_epi8(0, 3, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
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__m128i prev_input = _mm_set1_epi8(0);
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__m128i prev_first_len = _mm_set1_epi8(0);
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__m128i error = _mm_set1_epi8(0);
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auto check_packed = [&](__m128i input) noexcept
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{
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/* high_nibbles = input >> 4 */
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const __m128i high_nibbles = _mm_and_si128(_mm_srli_epi16(input, 4), _mm_set1_epi8(0x0F));
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/* first_len = legal character length minus 1 */
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/* 0 for 00~7F, 1 for C0~DF, 2 for E0~EF, 3 for F0~FF */
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/* first_len = first_len_tbl[high_nibbles] */
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__m128i first_len = _mm_shuffle_epi8(first_len_tbl, high_nibbles);
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/* First Byte: set range index to 8 for bytes within 0xC0 ~ 0xFF */
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/* range = first_range_tbl[high_nibbles] */
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__m128i range = _mm_shuffle_epi8(first_range_tbl, high_nibbles);
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/* Second Byte: set range index to first_len */
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/* 0 for 00~7F, 1 for C0~DF, 2 for E0~EF, 3 for F0~FF */
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/* range |= (first_len, prev_first_len) << 1 byte */
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range = _mm_or_si128(range, _mm_alignr_epi8(first_len, prev_first_len, 15));
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/* Third Byte: set range index to saturate_sub(first_len, 1) */
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/* 0 for 00~7F, 0 for C0~DF, 1 for E0~EF, 2 for F0~FF */
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__m128i tmp1;
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__m128i tmp2;
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/* tmp1 = saturate_sub(first_len, 1) */
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tmp1 = _mm_subs_epu8(first_len, _mm_set1_epi8(1));
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/* tmp2 = saturate_sub(prev_first_len, 1) */
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tmp2 = _mm_subs_epu8(prev_first_len, _mm_set1_epi8(1));
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/* range |= (tmp1, tmp2) << 2 bytes */
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range = _mm_or_si128(range, _mm_alignr_epi8(tmp1, tmp2, 14));
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/* Fourth Byte: set range index to saturate_sub(first_len, 2) */
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/* 0 for 00~7F, 0 for C0~DF, 0 for E0~EF, 1 for F0~FF */
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/* tmp1 = saturate_sub(first_len, 2) */
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tmp1 = _mm_subs_epu8(first_len, _mm_set1_epi8(2));
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/* tmp2 = saturate_sub(prev_first_len, 2) */
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tmp2 = _mm_subs_epu8(prev_first_len, _mm_set1_epi8(2));
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/* range |= (tmp1, tmp2) << 3 bytes */
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range = _mm_or_si128(range, _mm_alignr_epi8(tmp1, tmp2, 13));
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/*
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* Now we have below range indices calculated
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* Correct cases:
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* - 8 for C0~FF
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* - 3 for 1st byte after F0~FF
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* - 2 for 1st byte after E0~EF or 2nd byte after F0~FF
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* - 1 for 1st byte after C0~DF or 2nd byte after E0~EF or
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* 3rd byte after F0~FF
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* - 0 for others
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* Error cases:
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* 9,10,11 if non ascii First Byte overlaps
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* E.g., F1 80 C2 90 --> 8 3 10 2, where 10 indicates error
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*/
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/* Adjust Second Byte range for special First Bytes(E0,ED,F0,F4) */
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/* Overlaps lead to index 9~15, which are illegal in range table */
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__m128i shift1, pos, range2;
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/* shift1 = (input, prev_input) << 1 byte */
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shift1 = _mm_alignr_epi8(input, prev_input, 15);
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pos = _mm_sub_epi8(shift1, _mm_set1_epi8(0xEF));
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/*
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* shift1: | EF F0 ... FE | FF 00 ... ... DE | DF E0 ... EE |
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* pos: | 0 1 15 | 16 17 239| 240 241 255|
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* pos-240: | 0 0 0 | 0 0 0 | 0 1 15 |
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* pos+112: | 112 113 127| >= 128 | >= 128 |
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*/
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tmp1 = _mm_subs_epu8(pos, _mm_set1_epi8(0xF0));
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range2 = _mm_shuffle_epi8(df_ee_tbl, tmp1);
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tmp2 = _mm_adds_epu8(pos, _mm_set1_epi8(112));
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range2 = _mm_add_epi8(range2, _mm_shuffle_epi8(ef_fe_tbl, tmp2));
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range = _mm_add_epi8(range, range2);
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/* Load min and max values per calculated range index */
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__m128i minv = _mm_shuffle_epi8(range_min_tbl, range);
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__m128i maxv = _mm_shuffle_epi8(range_max_tbl, range);
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/* Check value range */
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error = _mm_or_si128(error, _mm_cmplt_epi8(input, minv));
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error = _mm_or_si128(error, _mm_cmpgt_epi8(input, maxv));
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prev_input = input;
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prev_first_len = first_len;
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data += 16;
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len -= 16;
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};
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while (len >= 16) // NOLINT //-V1044
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check_packed(_mm_loadu_si128(reinterpret_cast<const __m128i *>(data)));
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/// 0 <= len <= 15 for now. Reading data from data - 1 because of right padding of 15 and left padding
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/// Then zero some bytes from the unknown memory and check again.
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alignas(16) char buf[32];
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_mm_store_si128(reinterpret_cast<__m128i *>(buf), _mm_loadu_si128(reinterpret_cast<const __m128i *>(data - 1)));
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memset(buf + len + 1, 0, 16);
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check_packed(_mm_loadu_si128(reinterpret_cast<__m128i *>(buf + 1)));
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return _mm_testz_si128(error, error);
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}
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#endif
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static constexpr bool is_fixed_to_constant = false;
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static void vector(const ColumnString::Chars & data, const ColumnString::Offsets & offsets, PaddedPODArray<UInt8> & res);
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static void vectorFixedToConstant(const ColumnString::Chars & data, size_t n, UInt8 & res);
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static void vectorFixedToVector(const ColumnString::Chars & data, size_t n, PaddedPODArray<UInt8> & res);
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[[noreturn]] static void array(const ColumnString::Offsets &, PaddedPODArray<UInt8> &);
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[[noreturn]] static void uuid(const ColumnUUID::Container &, size_t &, PaddedPODArray<UInt8> &);
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};
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}
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