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uspoof_build.cpp (3278B)

      1 // © 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 ***************************************************************************
      5 * Copyright (C) 2008-2015, International Business Machines Corporation
      6 * and others. All Rights Reserved.
      7 ***************************************************************************
      8 *   file name:  uspoof_build.cpp
      9 *   encoding:   UTF-8
     10 *   tab size:   8 (not used)
     11 *   indentation:4
     12 *
     13 *   created on: 2008 Dec 8
     14 *   created by: Andy Heninger
     15 *
     16 *   Unicode Spoof Detection Data Builder
     17 *   Builder-related functions are kept in separate files so that applications not needing
     18 *   the builder can more easily exclude them, typically by means of static linking.
     19 *
     20 *   There are three relatively independent sets of Spoof data,
     21 *      Confusables,
     22 *      Whole Script Confusables
     23 *      ID character extensions.
     24 *
     25 *   The data tables for each are built separately, each from its own definitions
     26 */
     27 
     28 #include "unicode/utypes.h"
     29 #include "unicode/uspoof.h"
     30 #include "unicode/unorm.h"
     31 #include "unicode/uregex.h"
     32 #include "unicode/ustring.h"
     33 #include "cmemory.h"
     34 #include "uspoof_impl.h"
     35 #include "uhash.h"
     36 #include "uvector.h"
     37 #include "uassert.h"
     38 #include "uarrsort.h"
     39 #include "uspoof_conf.h"
     40 
     41 #if !UCONFIG_NO_NORMALIZATION
     42 
     43 U_NAMESPACE_USE
     44 
     45 // Defined in uspoof.cpp, initializes file-static variables.
     46 U_CFUNC void uspoof_internalInitStatics(UErrorCode *status);
     47 
     48 // The main data building function
     49 
     50 U_CAPI USpoofChecker * U_EXPORT2
     51 uspoof_openFromSource(const char *confusables,  int32_t confusablesLen,
     52                      const char* /*confusablesWholeScript*/, int32_t /*confusablesWholeScriptLen*/,
     53                      int32_t *errorType, UParseError *pe, UErrorCode *status) {
     54    uspoof_internalInitStatics(status);
     55    if (U_FAILURE(*status)) {
     56        return nullptr;
     57    }
     58 #if UCONFIG_NO_REGULAR_EXPRESSIONS 
     59    *status = U_UNSUPPORTED_ERROR;      
     60    return nullptr;
     61 #else
     62    if (errorType!=nullptr) {
     63        *errorType = 0;
     64    }
     65    if (pe != nullptr) {
     66        pe->line = 0;
     67        pe->offset = 0;
     68        pe->preContext[0] = 0;
     69        pe->postContext[0] = 0;
     70    }
     71 
     72    // Set up a shell of a spoof detector, with empty data.
     73    SpoofData *newSpoofData = new SpoofData(*status);
     74 
     75    if (newSpoofData == nullptr) {
     76        *status = U_MEMORY_ALLOCATION_ERROR;
     77        return nullptr;
     78    }
     79 
     80    if (U_FAILURE(*status)) {
     81        delete newSpoofData;
     82        return nullptr;
     83    }
     84    SpoofImpl *This = new SpoofImpl(newSpoofData, *status);
     85 
     86    if (This == nullptr) {
     87        *status = U_MEMORY_ALLOCATION_ERROR;
     88        delete newSpoofData; // explicit delete as the destructor for SpoofImpl won't be called.
     89        return nullptr;
     90    }
     91 
     92    if (U_FAILURE(*status)) {
     93        delete This; // no delete for newSpoofData, as the SpoofImpl destructor will delete it.
     94        return nullptr;
     95    }
     96 
     97    // Compile the binary data from the source (text) format.
     98    ConfusabledataBuilder::buildConfusableData(This, confusables, confusablesLen, errorType, pe, *status);
     99    
    100    if (U_FAILURE(*status)) {
    101        delete This;
    102        This = nullptr;
    103    }
    104    return (USpoofChecker *)This;
    105 #endif // UCONFIG_NO_REGULAR_EXPRESSIONS 
    106 }
    107 
    108 #endif