db75897057
https://code.google.com/p/cld2/issues/detail?id=7 git-svn-id: https://cld2.googlecode.com/svn/trunk@154 b252ecd4-b096-bf77-eb8e-91563289f87e
370 lines
16 KiB
C++
370 lines
16 KiB
C++
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <iostream>
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#include "cld2_dynamic_data.h"
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#include "cld2_dynamic_data_extractor.h"
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#include "cld2_dynamic_data_loader.h" // for verifying the written data
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#include "integral_types.h"
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#include "cld2tablesummary.h"
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#include "utf8statetable.h"
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using namespace std;
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namespace CLD2DynamicDataExtractor {
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static int DEBUG=0;
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void setDebug(int debug) {
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DEBUG=debug;
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}
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int advance(FILE* f, CLD2::uint32 position) {
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const char ZERO = 0;
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int pad = position - ftell(f);
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if (DEBUG) cout << " Adding " << pad << " bytes of padding" << endl;
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while (pad-- > 0) {
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fwrite(&ZERO,1,1,f);
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}
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return pad;
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}
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void writeChunk(FILE *f, const void* data, CLD2::uint32 startAt, CLD2::uint32 length) {
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if (DEBUG) cout << "Write chunk @" << startAt << ", len=" << length << endl;
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advance(f, startAt);
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if (DEBUG) cout << " Writing " << length << " bytes of data" << endl;
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fwrite(data, 1, length, f);
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}
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void writeDataFile(const CLD2::ScoringTables* data,
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const CLD2DynamicData::Supplement* supplement,
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const char* fileName) {
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// The order here is hardcoded and MUST NOT BE CHANGED, else you will de-sync
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// with the reading code.
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const char ZERO = 0;
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const int NUM_TABLES = 7;
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const CLD2::CLD2TableSummary* tableSummaries[NUM_TABLES];
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tableSummaries[0] = data->unigram_compat_obj;
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tableSummaries[1] = data->deltabi_obj;
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tableSummaries[2] = data->distinctbi_obj;
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tableSummaries[3] = data->quadgram_obj;
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tableSummaries[4] = data->quadgram_obj2;
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tableSummaries[5] = data->deltaocta_obj;
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tableSummaries[6] = data->distinctocta_obj;
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CLD2DynamicData::TableHeader tableHeaders[NUM_TABLES];
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CLD2DynamicData::FileHeader fileHeader;
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fileHeader.numTablesEncoded = NUM_TABLES;
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fileHeader.tableHeaders = tableHeaders;
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initUtf8Headers(&fileHeader, data->unigram_obj);
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initDeltaHeaders(&fileHeader, supplement->lengthOf_kAvgDeltaOctaScore);
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initTableHeaders(tableSummaries, NUM_TABLES, supplement, tableHeaders);
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alignAll(&fileHeader, 16); // Align all sections to 128-bit boundaries
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// We are ready to rock.
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for (int x=0; x<CLD2DynamicData::DATA_FILE_MARKER_LENGTH; x++)
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fileHeader.sanityString[x] = CLD2DynamicData::DATA_FILE_MARKER[x];
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FILE* outFile = fopen(fileName, "w");
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fwrite(fileHeader.sanityString, 1, CLD2DynamicData::DATA_FILE_MARKER_LENGTH, outFile);
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fwrite(&(fileHeader.totalFileSizeBytes), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_state0), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_state0_size), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_total_size), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_max_expand), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_entry_shift), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_bytes_per_entry), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_losub), 4, 1, outFile);
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fwrite(&(fileHeader.utf8PropObj_hiadd), 4, 1, outFile);
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fwrite(&(fileHeader.startOf_utf8PropObj_state_table), 4, 1, outFile);
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fwrite(&(fileHeader.lengthOf_utf8PropObj_state_table), 4, 1, outFile);
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fwrite(&(fileHeader.startOf_utf8PropObj_remap_base), 4, 1, outFile);
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fwrite(&(fileHeader.lengthOf_utf8PropObj_remap_base), 4, 1, outFile);
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fwrite(&(fileHeader.startOf_utf8PropObj_remap_string), 4, 1, outFile);
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fwrite(&(fileHeader.lengthOf_utf8PropObj_remap_string), 4, 1, outFile);
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fwrite(&(fileHeader.startOf_utf8PropObj_fast_state), 4, 1, outFile);
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fwrite(&(fileHeader.lengthOf_utf8PropObj_fast_state), 4, 1, outFile);
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fwrite(&(fileHeader.startOf_kAvgDeltaOctaScore), 4, 1, outFile);
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fwrite(&(fileHeader.lengthOf_kAvgDeltaOctaScore), 4, 1, outFile);
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fwrite(&(fileHeader.numTablesEncoded), 4, 1, outFile);
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for (int x=0; x<NUM_TABLES; x++) {
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CLD2DynamicData::TableHeader& tHeader = fileHeader.tableHeaders[x];
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fwrite(&(tHeader.kCLDTableSizeOne), 4, 1, outFile);
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fwrite(&(tHeader.kCLDTableSize), 4, 1, outFile);
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fwrite(&(tHeader.kCLDTableKeyMask), 4, 1, outFile);
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fwrite(&(tHeader.kCLDTableBuildDate), 4, 1, outFile);
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fwrite(&(tHeader.startOf_kCLDTable), 4, 1, outFile);
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fwrite(&(tHeader.lengthOf_kCLDTable), 4, 1, outFile);
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fwrite(&(tHeader.startOf_kCLDTableInd), 4, 1, outFile);
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fwrite(&(tHeader.lengthOf_kCLDTableInd), 4, 1, outFile);
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fwrite(&(tHeader.startOf_kRecognizedLangScripts), 4, 1, outFile);
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fwrite(&(tHeader.lengthOf_kRecognizedLangScripts), 4, 1, outFile);
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}
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// Write data blob
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// 1. UTF8 Object
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writeChunk(outFile,
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data->unigram_obj->state_table,
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fileHeader.startOf_utf8PropObj_state_table,
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fileHeader.lengthOf_utf8PropObj_state_table);
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// FIXME: Unsafe to rely on this since RemapEntry is not a bit-packed structure
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writeChunk(outFile,
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data->unigram_obj->remap_base,
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fileHeader.startOf_utf8PropObj_remap_base,
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fileHeader.lengthOf_utf8PropObj_remap_base);
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writeChunk(outFile,
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data->unigram_obj->remap_string,
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fileHeader.startOf_utf8PropObj_remap_string,
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fileHeader.lengthOf_utf8PropObj_remap_string - 1);
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fwrite(&ZERO,1,1,outFile); // null terminator
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if (fileHeader.startOf_utf8PropObj_fast_state > 0) {
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writeChunk(outFile,
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data->unigram_obj->fast_state,
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fileHeader.startOf_utf8PropObj_fast_state,
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fileHeader.lengthOf_utf8PropObj_fast_state - 1);
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fwrite(&ZERO,1,1,outFile); // null terminator
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}
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// 2. kAvgDeltaOctaScore array
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writeChunk(outFile,
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data->kExpectedScore,
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fileHeader.startOf_kAvgDeltaOctaScore,
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fileHeader.lengthOf_kAvgDeltaOctaScore);
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// 3. Each table
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for (int x=0; x<NUM_TABLES; x++) {
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const CLD2::CLD2TableSummary* summary = tableSummaries[x];
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CLD2DynamicData::TableHeader& tHeader = fileHeader.tableHeaders[x];
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// NB: Safe to directly write IndirectProbBucket4 as it is just an alias for CLD2::uint32
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writeChunk(outFile,
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summary->kCLDTable,
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tHeader.startOf_kCLDTable,
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tHeader.lengthOf_kCLDTable);
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writeChunk(outFile,
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summary->kCLDTableInd,
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tHeader.startOf_kCLDTableInd,
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tHeader.lengthOf_kCLDTableInd);
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writeChunk(outFile,
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summary->kRecognizedLangScripts,
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tHeader.startOf_kRecognizedLangScripts,
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tHeader.lengthOf_kRecognizedLangScripts - 1);
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fwrite(&ZERO,1,1,outFile); // null terminator
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}
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fclose(outFile);
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}
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void initTableHeaders(const CLD2::CLD2TableSummary** summaries,
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const int numSummaries,
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const CLD2DynamicData::Supplement* supplement,
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CLD2DynamicData::TableHeader* tableHeaders) {
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// Important: As documented in the .h, we assume that the Supplement data
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// structure contains exactly one entry in indirectTableSizes for each
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// CLD2TableSummary, in the same order.
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for (int x=0; x<numSummaries; x++) {
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const CLD2::CLD2TableSummary* summary = summaries[x];
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CLD2DynamicData::TableHeader& tableHeader = tableHeaders[x];
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// Copy the primitive bits
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tableHeader.kCLDTableSizeOne = summary->kCLDTableSizeOne;
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tableHeader.kCLDTableSize = summary->kCLDTableSize;
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tableHeader.kCLDTableKeyMask = summary->kCLDTableKeyMask;
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tableHeader.kCLDTableBuildDate = summary->kCLDTableBuildDate;
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// Calculate size information
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CLD2::uint32 bytesPerBucket = sizeof(CLD2::IndirectProbBucket4);
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CLD2::uint32 numBuckets = summary->kCLDTableSize;
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CLD2::uint32 tableSizeBytes = bytesPerBucket * numBuckets;
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CLD2::uint32 indirectTableSizeBytes =
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supplement->indirectTableSizes[x] * sizeof(CLD2::uint32);
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CLD2::uint32 recognizedScriptsSizeBytes =
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strlen(summary->kRecognizedLangScripts) + 1; // note null terminator
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// Place size information into header. We'll align on byte boundaries later.
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tableHeader.lengthOf_kCLDTable = tableSizeBytes;
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tableHeader.lengthOf_kCLDTableInd = indirectTableSizeBytes;
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tableHeader.lengthOf_kRecognizedLangScripts =
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recognizedScriptsSizeBytes; // null terminator counted above
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}
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}
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// Assuming that all fields have been set in the specified header, re-align
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// the starting positions of all data chunks to be aligned along 64-bit
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// boundaries for maximum efficiency.
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void alignAll(CLD2DynamicData::FileHeader* header, const int alignment) {
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CLD2::uint32 totalPadding = 0;
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if (DEBUG) { std::cout << "Align for " << (alignment*8) << " bits." << std::endl; }
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CLD2::uint32 headerSize = CLD2DynamicData::calculateHeaderSize(
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header->numTablesEncoded);
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CLD2::uint32 offset = headerSize;
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{ // scoping block
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int stateTablePad = alignment - (offset % alignment);
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if (stateTablePad == alignment) stateTablePad = 0;
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totalPadding += stateTablePad;
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if (DEBUG) { std::cout << "Alignment for stateTable adjusted by " << stateTablePad << std::endl; }
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offset += stateTablePad;
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header->startOf_utf8PropObj_state_table = offset;
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offset += header->lengthOf_utf8PropObj_state_table;
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}
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{ // scoping block
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int remapPad = alignment - (offset % alignment);
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if (remapPad == alignment) remapPad = 0;
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totalPadding += remapPad;
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if (DEBUG) { std::cout << "Alignment for remap adjusted by " << remapPad << std::endl; }
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offset += remapPad;
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header->startOf_utf8PropObj_remap_base = offset;
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offset += header->lengthOf_utf8PropObj_remap_base;
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}
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{ // scoping block
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int remapStringPad = alignment - (offset % alignment);
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if (remapStringPad == alignment) remapStringPad = 0;
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totalPadding += remapStringPad;
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if (DEBUG) { std::cout << "Alignment for remapString adjusted by " << remapStringPad << std::endl; }
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offset += remapStringPad;
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header->startOf_utf8PropObj_remap_string = offset;
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offset += header->lengthOf_utf8PropObj_remap_string; // null terminator already counted in initUtf8Headers
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}
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{ // scoping block
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int fastStatePad = alignment - (offset % alignment);
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if (fastStatePad == alignment) fastStatePad = 0;
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totalPadding += fastStatePad;
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if (DEBUG) { std::cout << "Alignment for fastState adjusted by " << fastStatePad << std::endl; }
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offset += fastStatePad;
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if (header->lengthOf_utf8PropObj_fast_state > 0) {
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header->startOf_utf8PropObj_fast_state = offset;
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offset += header->lengthOf_utf8PropObj_fast_state; // null terminator already counted in initUtf8Headers
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} else {
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header->startOf_utf8PropObj_fast_state = 0;
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}
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}
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{ // scoping block
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int deltaOctaPad = alignment - (offset % alignment);
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if (deltaOctaPad == alignment) deltaOctaPad = 0;
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totalPadding += deltaOctaPad;
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if (DEBUG) { std::cout << "Alignment for deltaOctaScore adjusted by " << deltaOctaPad << std::endl; }
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offset += deltaOctaPad;
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header->startOf_kAvgDeltaOctaScore = offset;
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offset += header->lengthOf_kAvgDeltaOctaScore;
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}
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for (int x=0; x<header->numTablesEncoded; x++) {
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CLD2DynamicData::TableHeader& tableHeader = header->tableHeaders[x];
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int tablePad = alignment - (offset % alignment);
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if (tablePad == alignment) tablePad = 0;
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totalPadding += tablePad;
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if (DEBUG) { std::cout << "Alignment for table " << x << " adjusted by " << tablePad << std::endl; }
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offset += tablePad;
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tableHeader.startOf_kCLDTable = offset;
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offset += tableHeader.lengthOf_kCLDTable;
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int indirectPad = alignment - (offset % alignment);
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if (indirectPad == alignment) indirectPad = 0;
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totalPadding += indirectPad;
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if (DEBUG) { std::cout << "Alignment for tableInd " << x << " adjusted by " << indirectPad << std::endl; }
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offset += indirectPad;
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tableHeader.startOf_kCLDTableInd = offset;
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offset += tableHeader.lengthOf_kCLDTableInd;
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int scriptsPad = alignment - (offset % alignment);
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if (scriptsPad == alignment) scriptsPad = 0;
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totalPadding += scriptsPad;
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if (DEBUG) { std::cout << "Alignment for scriptsPad " << x << " adjusted by " << scriptsPad << std::endl; }
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offset += scriptsPad;
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tableHeader.startOf_kRecognizedLangScripts = offset;
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offset += tableHeader.lengthOf_kRecognizedLangScripts; // null terminator already counted in initTableHeaders
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}
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// Now that we know exactly how much data we have written, store it in the
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// header as a sanity check
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header->totalFileSizeBytes = offset;
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if (DEBUG) {
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std::cout << "Data aligned." << std::endl;
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std::cout << "Header size: " << headerSize << " bytes " << std::endl;
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std::cout << "Data size: " << (offset - totalPadding) << " bytes" << std::endl;
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std::cout << "Padding size: " << totalPadding << " bytes" << std::endl;
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std::cout << " cld_generated_CjkUni_obj: " << (
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header->lengthOf_utf8PropObj_state_table +
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header->lengthOf_utf8PropObj_remap_string +
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header->lengthOf_utf8PropObj_fast_state)
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<< " bytes " << std::endl;
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std::cout << " kAvgDeltaOctaScore: "
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<< header->lengthOf_kAvgDeltaOctaScore << " bytes " << std::endl;
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std::cout << " kCjkCompat_obj: " << (
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header->tableHeaders[0].lengthOf_kCLDTable +
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header->tableHeaders[0].lengthOf_kCLDTableInd +
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header->tableHeaders[0].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kCjkDeltaBi_obj: " << (
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header->tableHeaders[1].lengthOf_kCLDTable +
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header->tableHeaders[1].lengthOf_kCLDTableInd +
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header->tableHeaders[1].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kDistinctBiTable_obj: " << (
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header->tableHeaders[2].lengthOf_kCLDTable +
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header->tableHeaders[2].lengthOf_kCLDTableInd +
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header->tableHeaders[2].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kQuad_obj: " << (
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header->tableHeaders[3].lengthOf_kCLDTable +
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header->tableHeaders[3].lengthOf_kCLDTableInd +
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header->tableHeaders[3].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kQuad_obj2: " << (
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header->tableHeaders[4].lengthOf_kCLDTable +
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header->tableHeaders[4].lengthOf_kCLDTableInd +
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header->tableHeaders[4].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kDeltaOcta_obj: " << (
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header->tableHeaders[5].lengthOf_kCLDTable +
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header->tableHeaders[5].lengthOf_kCLDTableInd +
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header->tableHeaders[5].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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std::cout << " kDistinctOcta_obj: " << (
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header->tableHeaders[6].lengthOf_kCLDTable +
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header->tableHeaders[6].lengthOf_kCLDTableInd +
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header->tableHeaders[6].lengthOf_kRecognizedLangScripts + 1)
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<< " bytes " << std::endl;
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}
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}
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void initDeltaHeaders(CLD2DynamicData::FileHeader* header, const CLD2::uint32 deltaLength) {
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header->startOf_kAvgDeltaOctaScore = 0;
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header->lengthOf_kAvgDeltaOctaScore = deltaLength;
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}
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void initUtf8Headers(CLD2DynamicData::FileHeader* header, const CLD2::UTF8PropObj* utf8Object) {
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header->utf8PropObj_state0 = utf8Object->state0;
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header->utf8PropObj_state0_size = utf8Object->state0_size;
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header->utf8PropObj_total_size = utf8Object->total_size;
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header->utf8PropObj_max_expand = utf8Object->max_expand;
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header->utf8PropObj_entry_shift = utf8Object->entry_shift;
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header->utf8PropObj_bytes_per_entry = utf8Object->bytes_per_entry;
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header->utf8PropObj_losub = utf8Object->losub;
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header->utf8PropObj_hiadd = utf8Object->hiadd;
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header->lengthOf_utf8PropObj_state_table = utf8Object->total_size;
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header->lengthOf_utf8PropObj_remap_base = sizeof(CLD2::RemapEntry); // TODO: Can this ever have more than one entry?
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header->lengthOf_utf8PropObj_remap_string = strlen(
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reinterpret_cast<const char*>(utf8Object->remap_string)) + 1; // note null terminator
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if (utf8Object->fast_state == NULL) {
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header->lengthOf_utf8PropObj_fast_state = 0; // not applicable
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} else {
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header->lengthOf_utf8PropObj_fast_state = strlen(
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reinterpret_cast<const char*>(utf8Object->fast_state)) + 1; // note null terminator
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}
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}
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} // End namespace CLD2DynamicDataExtractor
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