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// 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)
//
#ifndef I18N_ENCODINGS_CLD2_INTERNAL_TOTE_H_
#define I18N_ENCODINGS_CLD2_INTERNAL_TOTE_H_
#include <stdio.h>
#include "integral_types.h" // for uint8 etc
namespace CLD2 {
// Take a set of <key, score> pairs and tote them up.
// Key is an 8-bit per-script language
// After explicitly sorting, retrieve top key, score pairs
// Normal use is key=per-script language
// The main data structure is an array of 256 uint16 counts. We normally
// expect this to be initialized, added-to about 60 times, then the top three
// items found. The reduce the initial and final time, we also keep a bit vector
// of unused (and uninitialized) parts, each of 64 bits covering four keys.
class Tote {
public:
Tote();
~Tote();
void Reinit();
void AddScoreCount();
void Add(uint8 ikey, int idelta);
void AddBytes(int ibytes) {byte_count_ += ibytes;}
void CurrentTopThreeKeys(int* key3) const;
int GetScoreCount() const {return score_count_;}
int GetByteCount() const {return byte_count_;}
int GetScore(int i) const {return score_[i];}
void SetScoreCount(uint16 v) {score_count_ = v;}
void SetScore(int i, int v) {score_[i] = v;}
private:
uint64 in_use_mask_; // 64 bits, one for each group of 4 scores.
// 0 = not initialized,not used
int byte_count_; // Bytes of text scored
int score_count_; // Number of quadgrams/etc. scored
union {
uint64 gscore_[64]; // For alignment and clearing quickly
uint16 score_[256]; // Probability score sum
};
};
// Take a set of <key, score, reliability> triples and tote them up.
// Key is a 16-bit full language
// After explicitly sorting, retrieve top key, score, reliability triples
class DocTote {
public:
DocTote();
~DocTote();
void Reinit();
void Add(uint16 ikey, int ibytes, int score, int ireliability);
int Find(uint16 ikey);
void AddClosePair(int subscr, int val) {closepair_[subscr] += val;}
int CurrentTopKey();
Tote* RunningScore() {return &runningscore_;}
void Sort(int n);
void Dump(FILE* f);
int GetIncrCount() const {return incr_count_;}
int GetClosePair(int subscr) const {return closepair_[subscr];}
int MaxSize() const {return kMaxSize_;}
uint16 Key(int i) const {return key_[i];}
int Value(int i) const {return value_[i];} // byte count
int Score(int i) const {return score_[i];} // sum lg prob
int Reliability(int i) const {return reliability_[i];}
void SetKey(int i, int v) {key_[i] = v;}
void SetValue(int i, int v) {value_[i] = v;}
void SetScore(int i, int v) {score_[i] = v;}
void SetReliability(int i, int v) {reliability_[i] = v;}
static const uint16 kUnusedKey = 0xFFFF;
private:
static const int kMaxSize_ = 24;
static const int kMaxClosePairSize_ = 8;
int incr_count_; // Number of Add calls
int sorted_; // Contents have been sorted, cannot Add
Tote runningscore_; // Top lang scores across entire doc, for
// helping resolve close pairs
// Align at multiple of 8 bytes
int closepair_[kMaxClosePairSize_];
uint16 key_[kMaxSize_]; // Lang unassigned = 0xFFFF, valid = 1..1023
int value_[kMaxSize_]; // Bytecount this lang
int score_[kMaxSize_]; // Probability score sum
int reliability_[kMaxSize_]; // Percentage 0..100
};
} // End namespace CLD2
#endif // I18N_ENCODINGS_CLD2_INTERNAL_TOTE_H_
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