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-rw-r--r--application/basilisk/components/translation/cld2/internal/cldutil_shared.cc437
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diff --git a/application/basilisk/components/translation/cld2/internal/cldutil_shared.cc b/application/basilisk/components/translation/cld2/internal/cldutil_shared.cc
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index f111473af..000000000
--- a/application/basilisk/components/translation/cld2/internal/cldutil_shared.cc
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@@ -1,437 +0,0 @@
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//
-// Author: dsites@google.com (Dick Sites)
-//
-
-#include "cldutil_shared.h"
-#include <string>
-
-#include "cld2tablesummary.h"
-#include "integral_types.h"
-#include "port.h"
-#include "utf8statetable.h"
-
-namespace CLD2 {
-
-// Runtime routines for hashing, looking up, and scoring
-// unigrams (CJK), bigrams (CJK), quadgrams, and octagrams.
-// Unigrams and bigrams are for CJK languages only, including simplified/
-// traditional Chinese, Japanese, Korean, Vietnamese Han characters, and
-// Zhuang Han characters. Surrounding spaces are not considered.
-// Quadgrams and octagrams for for non-CJK and include two bits indicating
-// preceding and trailing spaces (word boundaries).
-
-
-// Indicator bits for leading/trailing space around quad/octagram
-// NOTE: 4444 bits are chosen to flip constant bits in hash of four chars of
-// 1-, 2-, or 3-bytes each.
-static const uint32 kPreSpaceIndicator = 0x00004444;
-static const uint32 kPostSpaceIndicator = 0x44440000;
-
-// Little-endian masks for 0..24 bytes picked up as uint32's
-static const uint32 kWordMask0[4] = {
- 0xFFFFFFFF, 0x000000FF, 0x0000FFFF, 0x00FFFFFF
-};
-
-static const int kMinCJKUTF8CharBytes = 3;
-
-static const int kMinGramCount = 3;
-static const int kMaxGramCount = 16;
-
-static const int UTFmax = 4; // Max number of bytes in a UTF-8 character
-
-
-// Routines to access a hash table of <key:wordhash, value:probs> pairs
-// Buckets have 4-byte wordhash for sizes < 32K buckets, but only
-// 2-byte wordhash for sizes >= 32K buckets, with other wordhash bits used as
-// bucket subscript.
-// Probs is a packed: three languages plus a subscript for probability table
-// Buckets have all the keys together, then all the values.Key array never
-// crosses a cache-line boundary, so no-match case takes exactly one cache miss.
-// Match case may sometimes take an additional cache miss on value access.
-//
-// Other possibilites include 5 or 10 6-byte entries plus pad to make 32 or 64
-// byte buckets with single cache miss.
-// Or 2-byte key and 6-byte value, allowing 5 languages instead of three.
-
-
-//----------------------------------------------------------------------------//
-// Hashing groups of 1/2/4/8 letters, perhaps with spaces or underscores //
-//----------------------------------------------------------------------------//
-
-// Design principles for these hash functions
-// - Few operations
-// - Handle 1-, 2-, and 3-byte UTF-8 scripts, ignoring intermixing except in
-// Latin script expect 1- and 2-byte mixtures.
-// - Last byte of each character has about 5 bits of information
-// - Spread good bits around so they can interact in at least two ways
-// with other characters
-// - Use add for additional mixing thorugh carries
-
-// CJK Three-byte bigram
-// ....dddd..cccccc..bbbbbb....aaaa
-// ..................ffffff..eeeeee
-// make
-// ....dddd..cccccc..bbbbbb....aaaa
-// 000....dddd..cccccc..bbbbbb....a
-// ..................ffffff..eeeeee
-// ffffff..eeeeee000000000000000000
-//
-// CJK Four-byte bigram
-// ..dddddd..cccccc....bbbb....aaaa
-// ..hhhhhh..gggggg....ffff....eeee
-// make
-// ..dddddd..cccccc....bbbb....aaaa
-// 000..dddddd..cccccc....bbbb....a
-// ..hhhhhh..gggggg....ffff....eeee
-// ..ffff....eeee000000000000000000
-
-// BIGRAM
-// Pick up 1..8 bytes and hash them via mask/shift/add. NO pre/post
-// OVERSHOOTS up to 3 bytes
-// For runtime use of tables
-// Does X86 unaligned loads
-uint32 BiHashV2(const char* word_ptr, int bytecount) {
- if (bytecount == 0) {return 0;}
- const uint32* word_ptr32 = reinterpret_cast<const uint32*>(word_ptr);
- uint32 word0, word1;
- if (bytecount <= 4) {
- word0 = UNALIGNED_LOAD32(word_ptr32) & kWordMask0[bytecount & 3];
- word0 = word0 ^ (word0 >> 3);
- return word0;
- }
- // Else do 8 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32);
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1) & kWordMask0[bytecount & 3];
- word1 = word1 ^ (word1 << 18);
- return word0 + word1;
-}
-
-//
-// Ascii-7 One-byte chars
-// ...ddddd...ccccc...bbbbb...aaaaa
-// make
-// ...ddddd...ccccc...bbbbb...aaaaa
-// 000...ddddd...ccccc...bbbbb...aa
-//
-// Latin 1- and 2-byte chars
-// ...ddddd...ccccc...bbbbb...aaaaa
-// ...................fffff...eeeee
-// make
-// ...ddddd...ccccc...bbbbb...aaaaa
-// 000...ddddd...ccccc...bbbbb...aa
-// ...................fffff...eeeee
-// ...............fffff...eeeee0000
-//
-// Non-CJK Two-byte chars
-// ...ddddd...........bbbbb........
-// ...hhhhh...........fffff........
-// make
-// ...ddddd...........bbbbb........
-// 000...ddddd...........bbbbb.....
-// ...hhhhh...........fffff........
-// hhhh...........fffff........0000
-//
-// Non-CJK Three-byte chars
-// ...........ccccc................
-// ...................fffff........
-// ...lllll...................iiiii
-// make
-// ...........ccccc................
-// 000...........ccccc.............
-// ...................fffff........
-// ...............fffff........0000
-// ...lllll...................iiiii
-// .lllll...................iiiii00
-//
-
-// QUADGRAM
-// Pick up 1..12 bytes plus pre/post space and hash them via mask/shift/add
-// OVERSHOOTS up to 3 bytes
-// For runtime use of tables
-// Does X86 unaligned loads
-uint32 QuadHashV2Mix(const char* word_ptr, int bytecount, uint32 prepost) {
- const uint32* word_ptr32 = reinterpret_cast<const uint32*>(word_ptr);
- uint32 word0, word1, word2;
- if (bytecount <= 4) {
- word0 = UNALIGNED_LOAD32(word_ptr32) & kWordMask0[bytecount & 3];
- word0 = word0 ^ (word0 >> 3);
- return word0 ^ prepost;
- } else if (bytecount <= 8) {
- word0 = UNALIGNED_LOAD32(word_ptr32);
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1) & kWordMask0[bytecount & 3];
- word1 = word1 ^ (word1 << 4);
- return (word0 ^ prepost) + word1;
- }
- // else do 12 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32);
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1);
- word1 = word1 ^ (word1 << 4);
- word2 = UNALIGNED_LOAD32(word_ptr32 + 2) & kWordMask0[bytecount & 3];
- word2 = word2 ^ (word2 << 2);
- return (word0 ^ prepost) + word1 + word2;
-}
-
-
-// QUADGRAM wrapper with surrounding spaces
-// Pick up 1..12 bytes plus pre/post space and hash them via mask/shift/add
-// UNDERSHOOTS 1 byte, OVERSHOOTS up to 3 bytes
-// For runtime use of tables
-uint32 QuadHashV2(const char* word_ptr, int bytecount) {
- if (bytecount == 0) {return 0;}
- uint32 prepost = 0;
- if (word_ptr[-1] == ' ') {prepost |= kPreSpaceIndicator;}
- if (word_ptr[bytecount] == ' ') {prepost |= kPostSpaceIndicator;}
- return QuadHashV2Mix(word_ptr, bytecount, prepost);
-}
-
-// QUADGRAM wrapper with surrounding underscores (offline use)
-// Pick up 1..12 bytes plus pre/post '_' and hash them via mask/shift/add
-// OVERSHOOTS up to 3 bytes
-// For offline construction of tables
-uint32 QuadHashV2Underscore(const char* word_ptr, int bytecount) {
- if (bytecount == 0) {return 0;}
- const char* local_word_ptr = word_ptr;
- int local_bytecount = bytecount;
- uint32 prepost = 0;
- if (local_word_ptr[0] == '_') {
- prepost |= kPreSpaceIndicator;
- ++local_word_ptr;
- --local_bytecount;
- }
- if (local_word_ptr[local_bytecount - 1] == '_') {
- prepost |= kPostSpaceIndicator;
- --local_bytecount;
- }
- return QuadHashV2Mix(local_word_ptr, local_bytecount, prepost);
-}
-
-
-// OCTAGRAM
-// Pick up 1..24 bytes plus pre/post space and hash them via mask/shift/add
-// UNDERSHOOTS 1 byte, OVERSHOOTS up to 3 bytes
-//
-// The low 32 bits follow the pattern from above, tuned to different scripts
-// The high 8 bits are a simple sum of all bytes, shifted by 0/1/2/3 bits each
-// For runtime use of tables V3
-// Does X86 unaligned loads
-uint64 OctaHash40Mix(const char* word_ptr, int bytecount, uint64 prepost) {
- const uint32* word_ptr32 = reinterpret_cast<const uint32*>(word_ptr);
- uint64 word0;
- uint64 word1;
- uint64 sum;
-
- if (word_ptr[-1] == ' ') {prepost |= kPreSpaceIndicator;}
- if (word_ptr[bytecount] == ' ') {prepost |= kPostSpaceIndicator;}
- switch ((bytecount - 1) >> 2) {
- case 0: // 1..4 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32) & kWordMask0[bytecount & 3];
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- break;
- case 1: // 5..8 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32);
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1) & kWordMask0[bytecount & 3];
- sum += word1;
- word1 = word1 ^ (word1 << 4);
- word0 += word1;
- break;
- case 2: // 9..12 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32);
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1);
- sum += word1;
- word1 = word1 ^ (word1 << 4);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 2) & kWordMask0[bytecount & 3];
- sum += word1;
- word1 = word1 ^ (word1 << 2);
- word0 += word1;
- break;
- case 3: // 13..16 bytes
- word0 =UNALIGNED_LOAD32(word_ptr32);
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1);
- sum += word1;
- word1 = word1 ^ (word1 << 4);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 2);
- sum += word1;
- word1 = word1 ^ (word1 << 2);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 3) & kWordMask0[bytecount & 3];
- sum += word1;
- word1 = word1 ^ (word1 >> 8);
- word0 += word1;
- break;
- case 4: // 17..20 bytes
- word0 = UNALIGNED_LOAD32(word_ptr32);
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1);
- sum += word1;
- word1 = word1 ^ (word1 << 4);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 2);
- sum += word1;
- word1 = word1 ^ (word1 << 2);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 3);
- sum += word1;
- word1 = word1 ^ (word1 >> 8);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 4) & kWordMask0[bytecount & 3];
- sum += word1;
- word1 = word1 ^ (word1 >> 4);
- word0 += word1;
- break;
- default: // 21..24 bytes and higher (ignores beyond 24)
- word0 = UNALIGNED_LOAD32(word_ptr32);
- sum = word0;
- word0 = word0 ^ (word0 >> 3);
- word1 = UNALIGNED_LOAD32(word_ptr32 + 1);
- sum += word1;
- word1 = word1 ^ (word1 << 4);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 2);
- sum += word1;
- word1 = word1 ^ (word1 << 2);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 3);
- sum += word1;
- word1 = word1 ^ (word1 >> 8);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 4);
- sum += word1;
- word1 = word1 ^ (word1 >> 4);
- word0 += word1;
- word1 = UNALIGNED_LOAD32(word_ptr32 + 5) & kWordMask0[bytecount & 3];
- sum += word1;
- word1 = word1 ^ (word1 >> 6);
- word0 += word1;
- break;
- }
-
- sum += (sum >> 17); // extra 1-bit shift for bytes 2 & 3
- sum += (sum >> 9); // extra 1-bit shift for bytes 1 & 3
- sum = (sum & 0xff) << 32;
- return (word0 ^ prepost) + sum;
-}
-
-// OCTAGRAM wrapper with surrounding spaces
-// Pick up 1..24 bytes plus pre/post space and hash them via mask/shift/add
-// UNDERSHOOTS 1 byte, OVERSHOOTS up to 3 bytes
-//
-// The low 32 bits follow the pattern from above, tuned to different scripts
-// The high 8 bits are a simple sum of all bytes, shifted by 0/1/2/3 bits each
-// For runtime use of tables V3
-uint64 OctaHash40(const char* word_ptr, int bytecount) {
- if (bytecount == 0) {return 0;}
- uint64 prepost = 0;
- if (word_ptr[-1] == ' ') {prepost |= kPreSpaceIndicator;}
- if (word_ptr[bytecount] == ' ') {prepost |= kPostSpaceIndicator;}
- return OctaHash40Mix(word_ptr, bytecount, prepost);
-}
-
-
-// OCTAGRAM wrapper with surrounding underscores (offline use)
-// Pick up 1..24 bytes plus pre/post space and hash them via mask/shift/add
-// UNDERSHOOTS 1 byte, OVERSHOOTS up to 3 bytes
-//
-// The low 32 bits follow the pattern from above, tuned to different scripts
-// The high 8 bits are a simple sum of all bytes, shifted by 0/1/2/3 bits each
-// For offline construction of tables
-uint64 OctaHash40underscore(const char* word_ptr, int bytecount) {
- if (bytecount == 0) {return 0;}
- const char* local_word_ptr = word_ptr;
- int local_bytecount = bytecount;
- uint64 prepost = 0;
- if (local_word_ptr[0] == '_') {
- prepost |= kPreSpaceIndicator;
- ++local_word_ptr;
- --local_bytecount;
- }
- if (local_word_ptr[local_bytecount - 1] == '_') {
- prepost |= kPostSpaceIndicator;
- --local_bytecount;
- }
- return OctaHash40Mix(local_word_ptr, local_bytecount, prepost);
-}
-
-// Hash a consecutive pair of tokens/words A B
-// Old: hash is B - A, which gives too many false hits on one-char diffs
-// Now: rotate(A,13) + B
-uint64 PairHash(uint64 worda_hash, uint64 wordb_hash) {
- return ((worda_hash >> 13) | (worda_hash << (64 - 13))) + wordb_hash;
-}
-
-
-
-
-//----------------------------------------------------------------------------//
-// Finding groups of 1/2/4/8 letters //
-//----------------------------------------------------------------------------//
-
-// src points to a letter. Find the byte length of a unigram starting there.
-int UniLen(const char* src) {
- const char* src_end = src;
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- return src_end - src;
-}
-
-// src points to a letter. Find the byte length of a bigram starting there.
-int BiLen(const char* src) {
- const char* src_end = src;
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- return src_end - src;
-}
-
-// src points to a letter. Find the byte length of a quadgram starting there.
-int QuadLen(const char* src) {
- const char* src_end = src;
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- src_end += kAdvanceOneCharButSpace[(uint8)src_end[0]];
- return src_end - src;
-}
-
-// src points to a letter. Find the byte length of an octagram starting there.
-int OctaLen(const char* src) {
- const char* src_end = src;
- int charcount = 0;
- while (src_end[0] != ' ') {
- src_end += UTF8OneCharLen(src);
- ++charcount;
- if (charcount == 8) {break;}
- }
- return src_end - src;
-}
-
-} // End namespace CLD2
-
-
-
-
-
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