| // Copyright 2014 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. |
| |
| #include <assert.h> |
| #include <stdio.h> |
| #include <iostream> |
| #include <fstream> |
| #include <fcntl.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| |
| #include "cld2_dynamic_data.h" |
| #include "cld2_dynamic_data_loader.h" |
| #include "integral_types.h" |
| #include "cld2tablesummary.h" |
| #include "utf8statetable.h" |
| #include "scoreonescriptspan.h" |
| |
| namespace CLD2DynamicDataLoader { |
| static int DEBUG=0; |
| |
| CLD2DynamicData::FileHeader* loadHeader(const char* fileName) { |
| // TODO: force null-terminate char* strings for safety |
| FILE* inFile = fopen(fileName, "r"); |
| if (inFile == NULL) { |
| return NULL; |
| } |
| |
| int bytesRead = 0; |
| CLD2DynamicData::FileHeader* fileHeader = new CLD2DynamicData::FileHeader; |
| bytesRead += fread(fileHeader->sanityString, 1, CLD2DynamicData::DATA_FILE_MARKER_LENGTH, inFile); |
| if (!CLD2DynamicData::mem_compare(fileHeader->sanityString, CLD2DynamicData::DATA_FILE_MARKER, CLD2DynamicData::DATA_FILE_MARKER_LENGTH)) { |
| std::cerr << "Malformed header: bad file marker!" << std::endl; |
| delete fileHeader; |
| return NULL; |
| } |
| |
| bytesRead += 4 * fread(&(fileHeader->totalFileSizeBytes), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_state0), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_state0_size), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_total_size), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_max_expand), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_entry_shift), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_bytes_per_entry), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_losub), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->utf8PropObj_hiadd), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->startOf_utf8PropObj_state_table), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->lengthOf_utf8PropObj_state_table), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->startOf_utf8PropObj_remap_base), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->lengthOf_utf8PropObj_remap_base), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->startOf_utf8PropObj_remap_string), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->lengthOf_utf8PropObj_remap_string), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->startOf_utf8PropObj_fast_state), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->lengthOf_utf8PropObj_fast_state), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->startOf_kAvgDeltaOctaScore), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->lengthOf_kAvgDeltaOctaScore), 4, 1, inFile); |
| bytesRead += 4 * fread(&(fileHeader->numTablesEncoded), 4, 1, inFile); |
| |
| CLD2DynamicData::TableHeader* tableHeaders = new CLD2DynamicData::TableHeader[fileHeader->numTablesEncoded]; |
| fileHeader->tableHeaders = tableHeaders; |
| for (int x=0; x<fileHeader->numTablesEncoded; x++) { |
| CLD2DynamicData::TableHeader &tHeader = fileHeader->tableHeaders[x]; |
| bytesRead += 4 * fread(&(tHeader.kCLDTableSizeOne), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.kCLDTableSize), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.kCLDTableKeyMask), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.kCLDTableBuildDate), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.startOf_kCLDTable), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.lengthOf_kCLDTable), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.startOf_kCLDTableInd), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.lengthOf_kCLDTableInd), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.startOf_kRecognizedLangScripts), 4, 1, inFile); |
| bytesRead += 4 * fread(&(tHeader.lengthOf_kRecognizedLangScripts), 4, 1, inFile); |
| } |
| |
| // Confirm header size is correct. |
| int expectedHeaderSize = CLD2DynamicData::calculateHeaderSize(fileHeader->numTablesEncoded); |
| if (expectedHeaderSize != bytesRead) { |
| std::cerr << "Header size mismatch! Expected " << expectedHeaderSize << ", but read " << bytesRead << std::endl; |
| delete fileHeader; |
| delete tableHeaders; |
| return NULL; |
| } |
| |
| // Confirm file size is correct. |
| fseek(inFile, 0, SEEK_END); |
| int actualSize = ftell(inFile); |
| fclose(inFile); |
| |
| if (actualSize != fileHeader->totalFileSizeBytes) { |
| std::cerr << "File size mismatch! Expected " << fileHeader->totalFileSizeBytes << ", but found " << actualSize << std::endl; |
| delete fileHeader; |
| delete tableHeaders; |
| return NULL; |
| } |
| return fileHeader; |
| } |
| |
| void unloadData(CLD2::ScoringTables** scoringTables, void** mmapAddress, int* mmapLength) { |
| free(const_cast<CLD2::UTF8PropObj*>((*scoringTables)->unigram_obj)); |
| (*scoringTables)->unigram_obj = NULL; |
| delete((*scoringTables)->unigram_compat_obj); // tableSummaries[0] from loadDataFile |
| (*scoringTables)->unigram_compat_obj = NULL; |
| delete(*scoringTables); |
| *scoringTables = NULL; |
| munmap(*mmapAddress, *mmapLength); |
| *mmapAddress = NULL; |
| *mmapLength = 0; |
| } |
| |
| CLD2::ScoringTables* loadDataFile(const char* fileName, void** mmapAddressOut, int* mmapLengthOut) { |
| CLD2DynamicData::FileHeader* fileHeader = loadHeader(fileName); |
| if (fileHeader == NULL) { |
| return NULL; |
| } |
| |
| // Initialize the memory map |
| int inFileHandle = open(fileName, O_RDONLY); |
| void* mapped = mmap(NULL, fileHeader->totalFileSizeBytes, |
| PROT_READ, MAP_PRIVATE, inFileHandle, 0); |
| // Record the map address. This allows callers to unmap |
| *mmapAddressOut=mapped; |
| *mmapLengthOut=fileHeader->totalFileSizeBytes; |
| close(inFileHandle); |
| |
| // 1. UTF8 Object |
| const CLD2::uint8* state_table = static_cast<const CLD2::uint8*>(mapped) + |
| fileHeader->startOf_utf8PropObj_state_table; |
| // FIXME: Unsafe to rely on this since RemapEntry is not a bit-packed structure |
| const CLD2::RemapEntry* remap_base = |
| reinterpret_cast<const CLD2::RemapEntry*>( |
| static_cast<const CLD2::uint8*>(mapped) + |
| fileHeader->startOf_utf8PropObj_remap_base); |
| const CLD2::uint8* remap_string = static_cast<const CLD2::uint8*>(mapped) + |
| fileHeader->startOf_utf8PropObj_remap_string; |
| const CLD2::uint8* fast_state = |
| fileHeader->startOf_utf8PropObj_fast_state == 0 ? 0 : |
| static_cast<const CLD2::uint8*>(mapped) + |
| fileHeader->startOf_utf8PropObj_fast_state; |
| |
| // Populate intermediate object. Horrible casting required because the struct |
| // is all read-only integers, and doesn't have a constructor. Yikes. |
| // TODO: It might actually be less horrible to memcpy the data in <shudder> |
| const CLD2::UTF8PropObj* unigram_obj = reinterpret_cast<CLD2::UTF8PropObj*>(malloc(sizeof(CLD2::UTF8PropObj))); |
| *const_cast<CLD2::uint32*>(&unigram_obj->state0) = fileHeader->utf8PropObj_state0; |
| *const_cast<CLD2::uint32*>(&unigram_obj->state0_size) = fileHeader->utf8PropObj_state0_size; |
| *const_cast<CLD2::uint32*>(&unigram_obj->total_size) = fileHeader->utf8PropObj_total_size; |
| *const_cast<int*>(&unigram_obj->max_expand) = fileHeader->utf8PropObj_max_expand; |
| *const_cast<int*>(&unigram_obj->entry_shift) = fileHeader->utf8PropObj_entry_shift; |
| *const_cast<int*>(&unigram_obj->bytes_per_entry) = fileHeader->utf8PropObj_bytes_per_entry; |
| *const_cast<CLD2::uint32*>(&unigram_obj->losub) = fileHeader->utf8PropObj_losub; |
| *const_cast<CLD2::uint32*>(&unigram_obj->hiadd) = fileHeader->utf8PropObj_hiadd; |
| *const_cast<const CLD2::uint8**>(&unigram_obj->state_table) = state_table; |
| *const_cast<const CLD2::RemapEntry**>(&unigram_obj->remap_base) = remap_base; |
| *const_cast<const CLD2::uint8**>(&unigram_obj->remap_string) = remap_string; |
| *const_cast<const CLD2::uint8**>(&unigram_obj->fast_state) = fast_state; |
| |
| // 2. kAvgDeltaOctaScore array |
| const short* read_kAvgDeltaOctaScore = reinterpret_cast<const short*>( |
| static_cast<const CLD2::uint8*>(mapped) + |
| fileHeader->startOf_kAvgDeltaOctaScore); |
| |
| // 3. Each table |
| CLD2::CLD2TableSummary* tableSummaries = new CLD2::CLD2TableSummary[fileHeader->numTablesEncoded]; |
| for (int x=0; x<fileHeader->numTablesEncoded; x++) { |
| CLD2::CLD2TableSummary &summary = tableSummaries[x]; |
| CLD2DynamicData::TableHeader& tHeader = fileHeader->tableHeaders[x]; |
| const CLD2::IndirectProbBucket4* kCLDTable = |
| reinterpret_cast<const CLD2::IndirectProbBucket4*>( |
| static_cast<CLD2::uint8*>(mapped) + tHeader.startOf_kCLDTable); |
| const CLD2::uint32* kCLDTableInd = |
| reinterpret_cast<const CLD2::uint32*>( |
| static_cast<CLD2::uint8*>(mapped) + tHeader.startOf_kCLDTableInd); |
| const char* kRecognizedLangScripts = |
| static_cast<const char*>(mapped) + tHeader.startOf_kRecognizedLangScripts; |
| |
| summary.kCLDTable = kCLDTable; |
| summary.kCLDTableInd = kCLDTableInd; |
| summary.kCLDTableSizeOne = tHeader.kCLDTableSizeOne; |
| summary.kCLDTableSize = tHeader.kCLDTableSize; |
| summary.kCLDTableKeyMask = tHeader.kCLDTableKeyMask; |
| summary.kCLDTableBuildDate = tHeader.kCLDTableBuildDate; |
| summary.kRecognizedLangScripts = kRecognizedLangScripts; |
| } |
| |
| // Tie everything together |
| CLD2::ScoringTables* result = new CLD2::ScoringTables; |
| result->unigram_obj = unigram_obj; |
| result->unigram_compat_obj = &tableSummaries[0]; |
| result->deltabi_obj = &tableSummaries[1]; |
| result->distinctbi_obj = &tableSummaries[2]; |
| result->quadgram_obj = &tableSummaries[3]; |
| result->quadgram_obj2 = &tableSummaries[4]; |
| result->deltaocta_obj = &tableSummaries[5]; |
| result->distinctocta_obj = &tableSummaries[6]; |
| result->kExpectedScore = read_kAvgDeltaOctaScore; |
| delete fileHeader->tableHeaders; |
| delete fileHeader; |
| return result; |
| } |
| } |