511 lines
14 KiB
C++
511 lines
14 KiB
C++
/*
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******************************************************************************
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* Copyright (C) 1998-2001, International Business Machines Corporation and *
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* others. All Rights Reserved. *
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******************************************************************************
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "unicode/utypes.h"
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#include "unicode/uchar.h"
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#include "unicode/uchriter.h"
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#include "unicode/brkiter.h"
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#include "unicode/locid.h"
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#include "unicode/unistr.h"
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/*
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* This program takes a Unicode text file containing Thai text with
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* spaces inserted where the word breaks are. It computes a copy of
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* the text without spaces and uses a word instance of a Thai BreakIterator
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* to compute the word breaks. The program reports any differences in the
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* breaks.
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*
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* NOTE: by it's very nature, Thai word breaking is not exact, so it is
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* exptected that this program will always report some differences.
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*/
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/*
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* This class is a break iterator that counts words and spaces.
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*/
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class SpaceBreakIterator
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{
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public:
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// The constructor:
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// text - pointer to an array of UChars to iterate over
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// count - the number of UChars in text
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SpaceBreakIterator(const UChar *text, int32_t count);
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// the destructor
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~SpaceBreakIterator();
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// return next break position
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int32_t next();
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// return current word count
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int32_t getWordCount();
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// return current space count
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int32_t getSpaceCount();
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private:
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// No arg constructor: private so clients can't call it.
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SpaceBreakIterator();
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// The underlying BreakIterator
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BreakIterator *fBreakIter;
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// address of the UChar array
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const UChar *fText;
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// number of UChars in fText
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int32_t fTextCount;
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// current word count
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int32_t fWordCount;
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// current space count
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int32_t fSpaceCount;
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// true when fBreakIter has returned DONE
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UBool fDone;
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};
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/*
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* This is the main class. It compares word breaks and reports the differences.
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*/
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class ThaiWordbreakTest
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{
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public:
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// The main constructor:
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// spaces - pointer to a UChar array for the text with spaces
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// spaceCount - the number of characters in the spaces array
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// noSpaces - pointer to a UChar array for the text without spaces
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// noSpaceCount - the number of characters in the noSpaces array
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// verbose - report all breaks if true, otherwise just report differences
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ThaiWordbreakTest(const UChar *spaces, int32_t spaceCount, const UChar *noSpaces, int32_t noSpaceCount, UBool verbose);
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~ThaiWordbreakTest();
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// returns the number of breaks that are in the spaces array
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// but aren't found in the noSpaces array
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int32_t getBreaksNotFound();
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// returns the number of breaks which are found in the noSpaces
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// array but aren't in the spaces array
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int32_t getInvalidBreaks();
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// returns the number of words found in the spaces array
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int32_t getWordCount();
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// reads the input Unicode text file:
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// fileName - the path name of the file
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// charCount - set to the number of UChars read from the file
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// returns - the address of the UChar array containing the characters
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static const UChar *readFile(char *fileName, int32_t &charCount);
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// removes spaces form the input UChar array:
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// spaces - pointer to the input UChar array
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// count - number of UChars in the spaces array
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// nonSpaceCount - the number of UChars in the result array
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// returns - the address of the UChar array with spaces removed
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static const UChar *crunchSpaces(const UChar *spaces, int32_t count, int32_t &nonSpaceCount);
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private:
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// The no arg constructor - private so clients can't call it
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ThaiWordbreakTest();
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// This does the actual comparison:
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// spaces - the address of the UChar array for the text with spaces
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// spaceCount - the number of UChars in the spaces array
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// noSpaces - the address of the UChar array for the text without spaces
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// noSpaceCount - the number of UChars in the noSpaces array
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// returns - true if all breaks match, false otherwise
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UBool compareWordBreaks(const UChar *spaces, int32_t spaceCount,
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const UChar *noSpaces, int32_t noSpaceCount);
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// helper method to report a break in the spaces
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// array that's not found in the noSpaces array
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void breakNotFound(int32_t br);
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// helper method to report a break that's found in
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// the noSpaces array that's not in the spaces array
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void foundInvalidBreak(int32_t br);
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// count of breaks in the spaces array that
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// aren't found in the noSpaces array
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int32_t fBreaksNotFound;
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// count of breaks found in the noSpaces array
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// that aren't in the spaces array
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int32_t fInvalidBreaks;
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// number of words found in the spaces array
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int32_t fWordCount;
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// report all breaks if true, otherwise just report differences
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UBool fVerbose;
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};
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/*
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* The main constructor: it calls compareWordBreaks and reports any differences
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*/
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ThaiWordbreakTest::ThaiWordbreakTest(const UChar *spaces, int32_t spaceCount,
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const UChar *noSpaces, int32_t noSpaceCount, UBool verbose)
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: fBreaksNotFound(0), fInvalidBreaks(0), fWordCount(0), fVerbose(verbose)
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{
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compareWordBreaks(spaces, spaceCount, noSpaces, noSpaceCount);
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}
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/*
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* The no arg constructor
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*/
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ThaiWordbreakTest::ThaiWordbreakTest()
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{
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// nothing
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}
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/*
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* The destructor
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*/
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ThaiWordbreakTest::~ThaiWordbreakTest()
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{
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// nothing?
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}
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/*
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* returns the number of breaks in the spaces array
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* that aren't found in the noSpaces array
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*/
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inline int32_t ThaiWordbreakTest::getBreaksNotFound()
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{
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return fBreaksNotFound;
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}
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/*
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* Returns the number of breaks found in the noSpaces
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* array that aren't in the spaces array
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*/
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inline int32_t ThaiWordbreakTest::getInvalidBreaks()
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{
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return fInvalidBreaks;
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}
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/*
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* Returns the number of words found in the spaces array
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*/
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inline int32_t ThaiWordbreakTest::getWordCount()
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{
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return fWordCount;
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}
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/*
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* This method does the acutal break comparison and reports the results.
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* It uses a SpaceBreakIterator to iterate over the text with spaces,
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* and a word instance of a Thai BreakIterator to iterate over the text
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* without spaces.
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*/
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UBool ThaiWordbreakTest::compareWordBreaks(const UChar *spaces, int32_t spaceCount,
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const UChar *noSpaces, int32_t noSpaceCount)
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{
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UBool result = true;
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Locale thai("th");
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UCharCharacterIterator *noSpaceIter = new UCharCharacterIterator(noSpaces, noSpaceCount);
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UErrorCode status = U_ZERO_ERROR;
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BreakIterator *breakIter = BreakIterator::createWordInstance(thai, status);
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breakIter->adoptText(noSpaceIter);
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SpaceBreakIterator spaceIter(spaces, spaceCount);
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int32_t nextBreak = 0;
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int32_t nextSpaceBreak = 0;
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int32_t iterCount = 0;
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while (true) {
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nextSpaceBreak = spaceIter.next();
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nextBreak = breakIter->next();
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if (nextSpaceBreak == BreakIterator::DONE || nextBreak == BreakIterator::DONE) {
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if (nextBreak != BreakIterator::DONE) {
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fprintf(stderr, "break iterator didn't end.\n");
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} else if (nextSpaceBreak != BreakIterator::DONE) {
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fprintf(stderr, "premature break iterator end.\n");
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}
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break;
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}
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while (nextSpaceBreak != nextBreak &&
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nextSpaceBreak != BreakIterator::DONE && nextBreak != BreakIterator::DONE) {
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if (nextSpaceBreak < nextBreak) {
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breakNotFound(nextSpaceBreak);
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result = false;
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nextSpaceBreak = spaceIter.next();
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} else if (nextSpaceBreak > nextBreak) {
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foundInvalidBreak(nextBreak);
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result = false;
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nextBreak = breakIter->next();
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}
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}
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if (fVerbose) {
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printf("%d %d\n", nextSpaceBreak, nextBreak);
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}
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}
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fWordCount = spaceIter.getWordCount();
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delete breakIter;
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return result;
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}
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/*
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* Report a break that's in the text with spaces but
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* not found in the text without spaces.
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*/
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void ThaiWordbreakTest::breakNotFound(int32_t br)
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{
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if (fVerbose) {
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printf("%d ****\n", br);
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} else {
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fprintf(stderr, "break not found: %d\n", br);
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}
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fBreaksNotFound += 1;
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}
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/*
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* Report a break that's found in the text without spaces
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* that isn't in the text with spaces.
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*/
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void ThaiWordbreakTest::foundInvalidBreak(int32_t br)
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{
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if (fVerbose) {
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printf("**** %d\n", br);
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} else {
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fprintf(stderr, "found invalid break: %d\n", br);
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}
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fInvalidBreaks += 1;
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}
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/*
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* Read the text from a file. The text must start with a Unicode Byte
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* Order Mark (BOM) so that we know what order to read the bytes in.
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*/
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const UChar *ThaiWordbreakTest::readFile(char *fileName, int32_t &charCount)
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{
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FILE *f;
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int32_t fileSize;
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UChar *buffer;
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char *bufferChars;
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f = fopen(fileName, "rb");
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if( f == NULL ) {
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fprintf(stderr,"Couldn't open %s reason: %s \n", fileName, strerror(errno));
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return 0;
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}
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fseek(f, 0, SEEK_END);
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fileSize = ftell(f);
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fseek(f, 0, SEEK_SET);
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bufferChars = new char[fileSize];
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if(bufferChars == 0) {
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fprintf(stderr,"Couldn't get memory for reading %s reason: %s \n", fileName, strerror(errno));
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fclose(f);
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return 0;
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}
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fread(bufferChars, sizeof(char), fileSize, f);
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if( ferror(f) ) {
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fprintf(stderr,"Couldn't read %s reason: %s \n", fileName, strerror(errno));
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fclose(f);
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delete[] bufferChars;
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return 0;
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}
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fclose(f);
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UnicodeString myText(bufferChars, fileSize, "UTF-8");
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delete[] bufferChars;
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charCount = myText.length();
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buffer = new UChar[charCount];
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if(buffer == 0) {
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fprintf(stderr,"Couldn't get memory for reading %s reason: %s \n", fileName, strerror(errno));
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return 0;
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}
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myText.extract(1, myText.length(), buffer);
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charCount--; // skip the BOM
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buffer[charCount] = 0; // NULL terminate for easier reading in the debugger
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return buffer;
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}
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/*
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* Remove spaces from the input UChar array.
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*
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* We check explicitly for a Unicode code value of 0x0020
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* because Unicode::isSpaceChar returns true for CR, LF, etc.
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*
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*/
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const UChar *ThaiWordbreakTest::crunchSpaces(const UChar *spaces, int32_t count, int32_t &nonSpaceCount)
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{
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int32_t i, out, spaceCount;
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spaceCount = 0;
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for (i = 0; i < count; i += 1) {
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if (spaces[i] == 0x0020 /*Unicode::isSpaceChar(spaces[i])*/) {
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spaceCount += 1;
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}
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}
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nonSpaceCount = count - spaceCount;
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UChar *noSpaces = new UChar[nonSpaceCount];
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if (noSpaces == 0) {
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fprintf(stderr, "Couldn't allocate memory for the space stripped text.\n");
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return 0;
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}
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for (out = 0, i = 0; i < count; i += 1) {
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if (spaces[i] != 0x0020 /*! Unicode::isSpaceChar(spaces[i])*/) {
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noSpaces[out++] = spaces[i];
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}
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}
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return noSpaces;
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}
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/*
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* The main routine. Read the command line arguments, read the text file,
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* remove the spaces, do the comparison and report the final results
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*/
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int main(int argc, char **argv)
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{
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char *fileName = "space.txt";
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int arg = 1;
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UBool verbose = false;
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if (argc >= 2 && strcmp(argv[1], "-verbose") == 0) {
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verbose = true;
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arg += 1;
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}
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if (arg == argc - 1) {
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fileName = argv[arg++];
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}
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if (arg != argc) {
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fprintf(stderr, "Usage: %s [-verbose] [<file>]\n", argv[0]);
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return 1;
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}
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int32_t spaceCount, nonSpaceCount;
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const UChar *spaces, *noSpaces;
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spaces = ThaiWordbreakTest::readFile(fileName, spaceCount);
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if (spaces == 0) {
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return 1;
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}
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noSpaces = ThaiWordbreakTest::crunchSpaces(spaces, spaceCount, nonSpaceCount);
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if (noSpaces == 0) {
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return 1;
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}
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ThaiWordbreakTest test(spaces, spaceCount, noSpaces, nonSpaceCount, verbose);
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printf("word count: %d\n", test.getWordCount());
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printf("breaks not found: %d\n", test.getBreaksNotFound());
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printf("invalid breaks found: %d\n", test.getInvalidBreaks());
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return 0;
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}
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/*
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* The main constructor. Clear all the counts and construct a default
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* word instance of a BreakIterator.
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*/
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SpaceBreakIterator::SpaceBreakIterator(const UChar *text, int32_t count)
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: fBreakIter(0), fText(text), fTextCount(count), fWordCount(0), fSpaceCount(0), fDone(false)
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{
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UCharCharacterIterator *iter = new UCharCharacterIterator(text, count);
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UErrorCode status = U_ZERO_ERROR;
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Locale us("us");
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fBreakIter = BreakIterator::createWordInstance(us, status);
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fBreakIter->adoptText(iter);
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}
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SpaceBreakIterator::SpaceBreakIterator()
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{
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// nothing
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}
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/*
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* The destructor. delete the underlying BreakIterator
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*/
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SpaceBreakIterator::~SpaceBreakIterator()
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{
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delete fBreakIter;
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}
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/*
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* Return the next break, counting words and spaces.
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*/
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int32_t SpaceBreakIterator::next()
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{
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if (fDone) {
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return BreakIterator::DONE;
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}
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int32_t nextBreak = fBreakIter->next();
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if (nextBreak == BreakIterator::DONE) {
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fDone = true;
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return BreakIterator::DONE;
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}
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int32_t result = nextBreak - fSpaceCount;
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if (nextBreak < fTextCount) {
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if (fText[nextBreak] == 0x0020 /*Unicode::isSpaceChar(fText[nextBreak])*/) {
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fSpaceCount += fBreakIter->next() - nextBreak;
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}
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}
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fWordCount += 1;
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return result;
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}
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/*
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* Returns the current space count
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*/
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int32_t SpaceBreakIterator::getSpaceCount()
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{
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return fSpaceCount;
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}
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/*
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* Returns the current word count
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*/
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int32_t SpaceBreakIterator::getWordCount()
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{
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return fWordCount;
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}
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