| /* |
| ****************************************************************************** |
| * Copyright (C) 1997-2006, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ****************************************************************************** |
| * file name: nfsubs.cpp |
| * encoding: US-ASCII |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * Modification history |
| * Date Name Comments |
| * 10/11/2001 Doug Ported from ICU4J |
| */ |
| |
| #include "nfsubs.h" |
| #include "digitlst.h" |
| |
| #include <stdio.h> |
| |
| #if U_HAVE_RBNF |
| |
| static const UChar gLessThan = 0x003c; |
| static const UChar gEquals = 0x003d; |
| static const UChar gGreaterThan = 0x003e; |
| static const UChar gPercent = 0x0025; |
| static const UChar gPound = 0x0023; |
| static const UChar gZero = 0x0030; |
| static const UChar gSpace = 0x0020; |
| |
| static const UChar gEqualsEquals[] = |
| { |
| 0x3D, 0x3D, 0 |
| }; /* "==" */ |
| static const UChar gGreaterGreaterGreaterThan[] = |
| { |
| 0x3E, 0x3E, 0x3E, 0 |
| }; /* ">>>" */ |
| static const UChar gGreaterGreaterThan[] = |
| { |
| 0x3E, 0x3E, 0 |
| }; /* ">>" */ |
| |
| U_NAMESPACE_BEGIN |
| |
| NFSubstitution* |
| NFSubstitution::makeSubstitution(int32_t pos, |
| const NFRule* rule, |
| const NFRule* predecessor, |
| const NFRuleSet* ruleSet, |
| const RuleBasedNumberFormat* formatter, |
| const UnicodeString& description, |
| UErrorCode& status) |
| { |
| // if the description is empty, return a NullSubstitution |
| if (description.length() == 0) { |
| return new NullSubstitution(pos, ruleSet, formatter, description, status); |
| } |
| |
| switch (description.charAt(0)) { |
| // if the description begins with '<'... |
| case gLessThan: |
| // throw an exception if the rule is a negative number |
| // rule |
| if (rule->getBaseValue() == NFRule::kNegativeNumberRule) { |
| // throw new IllegalArgumentException("<< not allowed in negative-number rule"); |
| status = U_PARSE_ERROR; |
| return NULL; |
| } |
| |
| // if the rule is a fraction rule, return an |
| // IntegralPartSubstitution |
| else if (rule->getBaseValue() == NFRule::kImproperFractionRule |
| || rule->getBaseValue() == NFRule::kProperFractionRule |
| || rule->getBaseValue() == NFRule::kMasterRule) { |
| return new IntegralPartSubstitution(pos, ruleSet, formatter, description, status); |
| } |
| |
| // if the rule set containing the rule is a fraction |
| // rule set, return a NumeratorSubstitution |
| else if (ruleSet->isFractionRuleSet()) { |
| return new NumeratorSubstitution(pos, (double)rule->getBaseValue(), |
| formatter->getDefaultRuleSet(), formatter, description, status); |
| } |
| |
| // otherwise, return a MultiplierSubstitution |
| else { |
| return new MultiplierSubstitution(pos, rule->getDivisor(), ruleSet, |
| formatter, description, status); |
| } |
| |
| // if the description begins with '>'... |
| case gGreaterThan: |
| // if the rule is a negative-number rule, return |
| // an AbsoluteValueSubstitution |
| if (rule->getBaseValue() == NFRule::kNegativeNumberRule) { |
| return new AbsoluteValueSubstitution(pos, ruleSet, formatter, description, status); |
| } |
| |
| // if the rule is a fraction rule, return a |
| // FractionalPartSubstitution |
| else if (rule->getBaseValue() == NFRule::kImproperFractionRule |
| || rule->getBaseValue() == NFRule::kProperFractionRule |
| || rule->getBaseValue() == NFRule::kMasterRule) { |
| return new FractionalPartSubstitution(pos, ruleSet, formatter, description, status); |
| } |
| |
| // if the rule set owning the rule is a fraction rule set, |
| // throw an exception |
| else if (ruleSet->isFractionRuleSet()) { |
| // throw new IllegalArgumentException(">> not allowed in fraction rule set"); |
| status = U_PARSE_ERROR; |
| return NULL; |
| } |
| |
| // otherwise, return a ModulusSubstitution |
| else { |
| return new ModulusSubstitution(pos, rule->getDivisor(), predecessor, |
| ruleSet, formatter, description, status); |
| } |
| |
| // if the description begins with '=', always return a |
| // SameValueSubstitution |
| case gEquals: |
| return new SameValueSubstitution(pos, ruleSet, formatter, description, status); |
| |
| // and if it's anything else, throw an exception |
| default: |
| // throw new IllegalArgumentException("Illegal substitution character"); |
| status = U_PARSE_ERROR; |
| } |
| return NULL; |
| } |
| |
| NFSubstitution::NFSubstitution(int32_t _pos, |
| const NFRuleSet* _ruleSet, |
| const RuleBasedNumberFormat* formatter, |
| const UnicodeString& description, |
| UErrorCode& status) |
| : pos(_pos), ruleSet(NULL), numberFormat(NULL) |
| { |
| // the description should begin and end with the same character. |
| // If it doesn't that's a syntax error. Otherwise, |
| // makeSubstitution() was the only thing that needed to know |
| // about these characters, so strip them off |
| UnicodeString workingDescription(description); |
| if (description.length() >= 2 |
| && description.charAt(0) == description.charAt(description.length() - 1)) |
| { |
| workingDescription.remove(description.length() - 1, 1); |
| workingDescription.remove(0, 1); |
| } |
| else if (description.length() != 0) { |
| // throw new IllegalArgumentException("Illegal substitution syntax"); |
| status = U_PARSE_ERROR; |
| return; |
| } |
| |
| // if the description was just two paired token characters |
| // (i.e., "<<" or ">>"), it uses the rule set it belongs to to |
| // format its result |
| if (workingDescription.length() == 0) { |
| this->ruleSet = _ruleSet; |
| } |
| // if the description contains a rule set name, that's the rule |
| // set we use to format the result: get a reference to the |
| // names rule set |
| else if (workingDescription.charAt(0) == gPercent) { |
| this->ruleSet = formatter->findRuleSet(workingDescription, status); |
| } |
| // if the description begins with 0 or #, treat it as a |
| // DecimalFormat pattern, and initialize a DecimalFormat with |
| // that pattern (then set it to use the DecimalFormatSymbols |
| // belonging to our formatter) |
| else if (workingDescription.charAt(0) == gPound || workingDescription.charAt(0) ==gZero) { |
| DecimalFormatSymbols* sym = formatter->getDecimalFormatSymbols(); |
| if (!sym) { |
| status = U_MISSING_RESOURCE_ERROR; |
| return; |
| } |
| this->numberFormat = new DecimalFormat(workingDescription, *sym, status); |
| /* test for NULL */ |
| if (this->numberFormat == 0) { |
| status = U_MEMORY_ALLOCATION_ERROR; |
| return; |
| } |
| if (U_FAILURE(status)) { |
| delete (DecimalFormat*)this->numberFormat; |
| this->numberFormat = NULL; |
| return; |
| } |
| // this->numberFormat->setDecimalFormatSymbols(formatter->getDecimalFormatSymbols()); |
| } |
| // if the description is ">>>", this substitution bypasses the |
| // usual rule-search process and always uses the rule that precedes |
| // it in its own rule set's rule list (this is used for place-value |
| // notations: formats where you want to see a particular part of |
| // a number even when it's 0) |
| else if (workingDescription.charAt(0) == gGreaterThan) { |
| // this causes problems when >>> is used in a frationalPartSubstitution |
| // this->ruleSet = NULL; |
| this->ruleSet = _ruleSet; |
| this->numberFormat = NULL; |
| } |
| // and of the description is none of these things, it's a syntax error |
| else { |
| // throw new IllegalArgumentException("Illegal substitution syntax"); |
| status = U_PARSE_ERROR; |
| } |
| } |
| |
| NFSubstitution::~NFSubstitution() |
| { |
| // cast away const |
| delete (NumberFormat*)numberFormat; numberFormat = NULL; |
| } |
| |
| /** |
| * Set's the substitution's divisor. Used by NFRule.setBaseValue(). |
| * A no-op for all substitutions except multiplier and modulus |
| * substitutions. |
| * @param radix The radix of the divisor |
| * @param exponent The exponent of the divisor |
| */ |
| void |
| NFSubstitution::setDivisor(int32_t /*radix*/, int32_t /*exponent*/, UErrorCode& /*status*/) { |
| // a no-op for all substitutions except multiplier and modulus substitutions |
| } |
| |
| |
| //----------------------------------------------------------------------- |
| // boilerplate |
| //----------------------------------------------------------------------- |
| |
| const char NFSubstitution::fgClassID = 0; |
| |
| UClassID |
| NFSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| /** |
| * Compares two substitutions for equality |
| * @param The substitution to compare this one to |
| * @return true if the two substitutions are functionally equivalent |
| */ |
| UBool |
| NFSubstitution::operator==(const NFSubstitution& rhs) const |
| { |
| // compare class and all of the fields all substitutions have |
| // in common |
| // this should be called by subclasses before their own equality tests |
| return getDynamicClassID() == rhs.getDynamicClassID() |
| && pos == rhs.pos |
| && (ruleSet == NULL) == (rhs.ruleSet == NULL) |
| // && ruleSet == rhs.ruleSet causes circularity, other checks to make instead? |
| && (numberFormat == NULL |
| ? (rhs.numberFormat == NULL) |
| : (*numberFormat == *rhs.numberFormat)); |
| } |
| |
| /** |
| * Returns a textual description of the substitution |
| * @return A textual description of the substitution. This might |
| * not be identical to the description it was created from, but |
| * it'll produce the same result. |
| */ |
| void |
| NFSubstitution::toString(UnicodeString& text) const |
| { |
| // use tokenChar() to get the character at the beginning and |
| // end of the substitutin token. In between them will go |
| // either the name of the rule set it uses, or the pattern of |
| // the DecimalFormat it uses |
| text.remove(); |
| text.append(tokenChar()); |
| |
| UnicodeString temp; |
| if (ruleSet != NULL) { |
| ruleSet->getName(temp); |
| } else if (numberFormat != NULL) { |
| numberFormat->toPattern(temp); |
| } |
| text.append(temp); |
| text.append(tokenChar()); |
| } |
| |
| //----------------------------------------------------------------------- |
| // formatting |
| //----------------------------------------------------------------------- |
| |
| /** |
| * Performs a mathematical operation on the number, formats it using |
| * either ruleSet or decimalFormat, and inserts the result into |
| * toInsertInto. |
| * @param number The number being formatted. |
| * @param toInsertInto The string we insert the result into |
| * @param pos The position in toInsertInto where the owning rule's |
| * rule text begins (this value is added to this substitution's |
| * position to determine exactly where to insert the new text) |
| */ |
| void |
| NFSubstitution::doSubstitution(int64_t number, UnicodeString& toInsertInto, int32_t _pos) const |
| { |
| if (ruleSet != NULL) { |
| // perform a transformation on the number that is dependent |
| // on the type of substitution this is, then just call its |
| // rule set's format() method to format the result |
| ruleSet->format(transformNumber(number), toInsertInto, _pos + this->pos); |
| } else if (numberFormat != NULL) { |
| // or perform the transformation on the number (preserving |
| // the result's fractional part if the formatter it set |
| // to show it), then use that formatter's format() method |
| // to format the result |
| double numberToFormat = transformNumber((double)number); |
| if (numberFormat->getMaximumFractionDigits() == 0) { |
| numberToFormat = uprv_floor(numberToFormat); |
| } |
| |
| UnicodeString temp; |
| numberFormat->format(numberToFormat, temp); |
| toInsertInto.insert(_pos + this->pos, temp); |
| } |
| } |
| |
| /** |
| * Performs a mathematical operation on the number, formats it using |
| * either ruleSet or decimalFormat, and inserts the result into |
| * toInsertInto. |
| * @param number The number being formatted. |
| * @param toInsertInto The string we insert the result into |
| * @param pos The position in toInsertInto where the owning rule's |
| * rule text begins (this value is added to this substitution's |
| * position to determine exactly where to insert the new text) |
| */ |
| void |
| NFSubstitution::doSubstitution(double number, UnicodeString& toInsertInto, int32_t _pos) const { |
| // perform a transformation on the number being formatted that |
| // is dependent on the type of substitution this is |
| double numberToFormat = transformNumber(number); |
| |
| // if the result is an integer, from here on out we work in integer |
| // space (saving time and memory and preserving accuracy) |
| if (numberToFormat == uprv_floor(numberToFormat) && ruleSet != NULL) { |
| ruleSet->format(util64_fromDouble(numberToFormat), toInsertInto, _pos + this->pos); |
| |
| // if the result isn't an integer, then call either our rule set's |
| // format() method or our DecimalFormat's format() method to |
| // format the result |
| } else { |
| if (ruleSet != NULL) { |
| ruleSet->format(numberToFormat, toInsertInto, _pos + this->pos); |
| } else if (numberFormat != NULL) { |
| UnicodeString temp; |
| numberFormat->format(numberToFormat, temp); |
| toInsertInto.insert(_pos + this->pos, temp); |
| } |
| } |
| } |
| |
| |
| //----------------------------------------------------------------------- |
| // parsing |
| //----------------------------------------------------------------------- |
| |
| #ifdef RBNF_DEBUG |
| #include <stdio.h> |
| #endif |
| |
| /** |
| * Parses a string using the rule set or DecimalFormat belonging |
| * to this substitution. If there's a match, a mathematical |
| * operation (the inverse of the one used in formatting) is |
| * performed on the result of the parse and the value passed in |
| * and returned as the result. The parse position is updated to |
| * point to the first unmatched character in the string. |
| * @param text The string to parse |
| * @param parsePosition On entry, ignored, but assumed to be 0. |
| * On exit, this is updated to point to the first unmatched |
| * character (or 0 if the substitution didn't match) |
| * @param baseValue A partial parse result that should be |
| * combined with the result of this parse |
| * @param upperBound When searching the rule set for a rule |
| * matching the string passed in, only rules with base values |
| * lower than this are considered |
| * @param lenientParse If true and matching against rules fails, |
| * the substitution will also try matching the text against |
| * numerals using a default-costructed NumberFormat. If false, |
| * no extra work is done. (This value is false whenever the |
| * formatter isn't in lenient-parse mode, but is also false |
| * under some conditions even when the formatter _is_ in |
| * lenient-parse mode.) |
| * @return If there's a match, this is the result of composing |
| * baseValue with whatever was returned from matching the |
| * characters. This will be either a Long or a Double. If there's |
| * no match this is new Long(0) (not null), and parsePosition |
| * is left unchanged. |
| */ |
| UBool |
| NFSubstitution::doParse(const UnicodeString& text, |
| ParsePosition& parsePosition, |
| double baseValue, |
| double upperBound, |
| UBool lenientParse, |
| Formattable& result) const |
| { |
| #ifdef RBNF_DEBUG |
| fprintf(stderr, "<nfsubs> %x bv: %g ub: %g\n", this, baseValue, upperBound); |
| #endif |
| // figure out the highest base value a rule can have and match |
| // the text being parsed (this varies according to the type of |
| // substitutions: multiplier, modulus, and numerator substitutions |
| // restrict the search to rules with base values lower than their |
| // own; same-value substitutions leave the upper bound wherever |
| // it was, and the others allow any rule to match |
| upperBound = calcUpperBound(upperBound); |
| |
| // use our rule set to parse the text. If that fails and |
| // lenient parsing is enabled (this is always false if the |
| // formatter's lenient-parsing mode is off, but it may also |
| // be false even when the formatter's lenient-parse mode is |
| // on), then also try parsing the text using a default- |
| // constructed NumberFormat |
| if (ruleSet != NULL) { |
| ruleSet->parse(text, parsePosition, upperBound, result); |
| if (lenientParse && !ruleSet->isFractionRuleSet() && parsePosition.getIndex() == 0) { |
| UErrorCode status = U_ZERO_ERROR; |
| NumberFormat* fmt = NumberFormat::createInstance(status); |
| if (U_SUCCESS(status)) { |
| fmt->parse(text, result, parsePosition); |
| } |
| delete fmt; |
| } |
| |
| // ...or use our DecimalFormat to parse the text |
| } else if (numberFormat != NULL) { |
| numberFormat->parse(text, result, parsePosition); |
| } |
| |
| // if the parse was successful, we've already advanced the caller's |
| // parse position (this is the one function that doesn't have one |
| // of its own). Derive a parse result and return it as a Long, |
| // if possible, or a Double |
| if (parsePosition.getIndex() != 0) { |
| UErrorCode status = U_ZERO_ERROR; |
| double tempResult = result.getDouble(status); |
| |
| // composeRuleValue() produces a full parse result from |
| // the partial parse result passed to this function from |
| // the caller (this is either the owning rule's base value |
| // or the partial result obtained from composing the |
| // owning rule's base value with its other substitution's |
| // parse result) and the partial parse result obtained by |
| // matching the substitution (which will be the same value |
| // the caller would get by parsing just this part of the |
| // text with RuleBasedNumberFormat.parse() ). How the two |
| // values are used to derive the full parse result depends |
| // on the types of substitutions: For a regular rule, the |
| // ultimate result is its multiplier substitution's result |
| // times the rule's divisor (or the rule's base value) plus |
| // the modulus substitution's result (which will actually |
| // supersede part of the rule's base value). For a negative- |
| // number rule, the result is the negative of its substitution's |
| // result. For a fraction rule, it's the sum of its two |
| // substitution results. For a rule in a fraction rule set, |
| // it's the numerator substitution's result divided by |
| // the rule's base value. Results from same-value substitutions |
| // propagate back upard, and null substitutions don't affect |
| // the result. |
| tempResult = composeRuleValue(tempResult, baseValue); |
| result.setDouble(tempResult); |
| return TRUE; |
| // if the parse was UNsuccessful, return 0 |
| } else { |
| result.setLong(0); |
| return FALSE; |
| } |
| } |
| |
| UBool |
| NFSubstitution::isNullSubstitution() const { |
| return FALSE; |
| } |
| |
| /** |
| * Returns true if this is a modulus substitution. (We didn't do this |
| * with instanceof partially because it causes source files to |
| * proliferate and partially because we have to port this to C++.) |
| * @return true if this object is an instance of ModulusSubstitution |
| */ |
| UBool |
| NFSubstitution::isModulusSubstitution() const { |
| return FALSE; |
| } |
| |
| //=================================================================== |
| // SameValueSubstitution |
| //=================================================================== |
| |
| /** |
| * A substitution that passes the value passed to it through unchanged. |
| * Represented by == in rule descriptions. |
| */ |
| SameValueSubstitution::SameValueSubstitution(int32_t _pos, |
| const NFRuleSet* _ruleSet, |
| const RuleBasedNumberFormat* formatter, |
| const UnicodeString& description, |
| UErrorCode& status) |
| : NFSubstitution(_pos, _ruleSet, formatter, description, status) |
| { |
| if (description == gEqualsEquals) { |
| // throw new IllegalArgumentException("== is not a legal token"); |
| status = U_PARSE_ERROR; |
| } |
| } |
| |
| const char SameValueSubstitution::fgClassID = 0; |
| |
| UClassID |
| SameValueSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| |
| //=================================================================== |
| // MultiplierSubstitution |
| //=================================================================== |
| |
| const char MultiplierSubstitution::fgClassID = 0; |
| |
| UClassID |
| MultiplierSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| UBool MultiplierSubstitution::operator==(const NFSubstitution& rhs) const |
| { |
| return NFSubstitution::operator==(rhs) && |
| divisor == ((const MultiplierSubstitution*)&rhs)->divisor; |
| } |
| |
| |
| //=================================================================== |
| // ModulusSubstitution |
| //=================================================================== |
| |
| /** |
| * A substitution that divides the number being formatted by the its rule's |
| * divisor and formats the remainder. Represented by ">>" in a |
| * regular rule. |
| */ |
| ModulusSubstitution::ModulusSubstitution(int32_t _pos, |
| double _divisor, |
| const NFRule* predecessor, |
| const NFRuleSet* _ruleSet, |
| const RuleBasedNumberFormat* formatter, |
| const UnicodeString& description, |
| UErrorCode& status) |
| : NFSubstitution(_pos, _ruleSet, formatter, description, status) |
| , divisor(_divisor) |
| , ruleToUse(NULL) |
| { |
| ldivisor = util64_fromDouble(_divisor); |
| |
| // the owning rule's divisor controls the behavior of this |
| // substitution: rather than keeping a backpointer to the rule, |
| // we keep a copy of the divisor |
| |
| if (ldivisor == 0) { |
| status = U_PARSE_ERROR; |
| } |
| |
| if (description == gGreaterGreaterGreaterThan) { |
| // the >>> token doesn't alter how this substituion calculates the |
| // values it uses for formatting and parsing, but it changes |
| // what's done with that value after it's obtained: >>> short- |
| // circuits the rule-search process and goes straight to the |
| // specified rule to format the substitution value |
| ruleToUse = predecessor; |
| } |
| } |
| |
| const char ModulusSubstitution::fgClassID = 0; |
| |
| UClassID |
| ModulusSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| UBool ModulusSubstitution::operator==(const NFSubstitution& rhs) const |
| { |
| return NFSubstitution::operator==(rhs) && |
| divisor == ((const ModulusSubstitution*)&rhs)->divisor && |
| ruleToUse == ((const ModulusSubstitution*)&rhs)->ruleToUse; |
| } |
| |
| //----------------------------------------------------------------------- |
| // formatting |
| //----------------------------------------------------------------------- |
| |
| |
| /** |
| * If this is a >>> substitution, use ruleToUse to fill in |
| * the substitution. Otherwise, just use the superclass function. |
| * @param number The number being formatted |
| * @toInsertInto The string to insert the result of this substitution |
| * into |
| * @param pos The position of the rule text in toInsertInto |
| */ |
| void |
| ModulusSubstitution::doSubstitution(int64_t number, UnicodeString& toInsertInto, int32_t _pos) const |
| { |
| // if this isn't a >>> substitution, just use the inherited version |
| // of this function (which uses either a rule set or a DecimalFormat |
| // to format its substitution value) |
| if (ruleToUse == NULL) { |
| NFSubstitution::doSubstitution(number, toInsertInto, _pos); |
| |
| // a >>> substitution goes straight to a particular rule to |
| // format the substitution value |
| } else { |
| int64_t numberToFormat = transformNumber(number); |
| ruleToUse->doFormat(numberToFormat, toInsertInto, _pos + getPos()); |
| } |
| } |
| |
| /** |
| * If this is a >>> substitution, use ruleToUse to fill in |
| * the substitution. Otherwise, just use the superclass function. |
| * @param number The number being formatted |
| * @toInsertInto The string to insert the result of this substitution |
| * into |
| * @param pos The position of the rule text in toInsertInto |
| */ |
| void |
| ModulusSubstitution::doSubstitution(double number, UnicodeString& toInsertInto, int32_t _pos) const |
| { |
| // if this isn't a >>> substitution, just use the inherited version |
| // of this function (which uses either a rule set or a DecimalFormat |
| // to format its substitution value) |
| if (ruleToUse == NULL) { |
| NFSubstitution::doSubstitution(number, toInsertInto, _pos); |
| |
| // a >>> substitution goes straight to a particular rule to |
| // format the substitution value |
| } else { |
| double numberToFormat = transformNumber(number); |
| |
| ruleToUse->doFormat(numberToFormat, toInsertInto, _pos + getPos()); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| // parsing |
| //----------------------------------------------------------------------- |
| |
| /** |
| * If this is a >>> substitution, match only against ruleToUse. |
| * Otherwise, use the superclass function. |
| * @param text The string to parse |
| * @param parsePosition Ignored on entry, updated on exit to point to |
| * the first unmatched character. |
| * @param baseValue The partial parse result prior to calling this |
| * routine. |
| */ |
| UBool |
| ModulusSubstitution::doParse(const UnicodeString& text, |
| ParsePosition& parsePosition, |
| double baseValue, |
| double upperBound, |
| UBool lenientParse, |
| Formattable& result) const |
| { |
| // if this isn't a >>> substitution, we can just use the |
| // inherited parse() routine to do the parsing |
| if (ruleToUse == NULL) { |
| return NFSubstitution::doParse(text, parsePosition, baseValue, upperBound, lenientParse, result); |
| |
| // but if it IS a >>> substitution, we have to do it here: we |
| // use the specific rule's doParse() method, and then we have to |
| // do some of the other work of NFRuleSet.parse() |
| } else { |
| ruleToUse->doParse(text, parsePosition, FALSE, upperBound, result); |
| |
| if (parsePosition.getIndex() != 0) { |
| UErrorCode status = U_ZERO_ERROR; |
| double tempResult = result.getDouble(status); |
| tempResult = composeRuleValue(tempResult, baseValue); |
| result.setDouble(tempResult); |
| } |
| |
| return TRUE; |
| } |
| } |
| |
| |
| //=================================================================== |
| // IntegralPartSubstitution |
| //=================================================================== |
| |
| const char IntegralPartSubstitution::fgClassID = 0; |
| |
| UClassID |
| IntegralPartSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| |
| //=================================================================== |
| // FractionalPartSubstitution |
| //=================================================================== |
| |
| |
| /** |
| * Constructs a FractionalPartSubstitution. This object keeps a flag |
| * telling whether it should format by digits or not. In addition, |
| * it marks the rule set it calls (if any) as a fraction rule set. |
| */ |
| FractionalPartSubstitution::FractionalPartSubstitution(int32_t _pos, |
| const NFRuleSet* _ruleSet, |
| const RuleBasedNumberFormat* formatter, |
| const UnicodeString& description, |
| UErrorCode& status) |
| : NFSubstitution(_pos, _ruleSet, formatter, description, status) |
| , byDigits(FALSE) |
| , useSpaces(TRUE) |
| |
| { |
| // akk, ruleSet can change in superclass constructor |
| if (description == gGreaterGreaterThan || |
| description == gGreaterGreaterGreaterThan || |
| _ruleSet == getRuleSet()) { |
| byDigits = TRUE; |
| if (description == gGreaterGreaterGreaterThan) { |
| useSpaces = FALSE; |
| } |
| } else { |
| // cast away const |
| ((NFRuleSet*)getRuleSet())->makeIntoFractionRuleSet(); |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| // formatting |
| //----------------------------------------------------------------------- |
| |
| /** |
| * If in "by digits" mode, fills in the substitution one decimal digit |
| * at a time using the rule set containing this substitution. |
| * Otherwise, uses the superclass function. |
| * @param number The number being formatted |
| * @param toInsertInto The string to insert the result of formatting |
| * the substitution into |
| * @param pos The position of the owning rule's rule text in |
| * toInsertInto |
| */ |
| void |
| FractionalPartSubstitution::doSubstitution(double number, UnicodeString& toInsertInto, int32_t _pos) const |
| { |
| // if we're not in "byDigits" mode, just use the inherited |
| // doSubstitution() routine |
| if (!byDigits) { |
| NFSubstitution::doSubstitution(number, toInsertInto, _pos); |
| |
| // if we're in "byDigits" mode, transform the value into an integer |
| // by moving the decimal point eight places to the right and |
| // pulling digits off the right one at a time, formatting each digit |
| // as an integer using this substitution's owning rule set |
| // (this is slower, but more accurate, than doing it from the |
| // other end) |
| } else { |
| // int32_t numberToFormat = (int32_t)uprv_round(transformNumber(number) * uprv_pow(10, kMaxDecimalDigits)); |
| // // this flag keeps us from formatting trailing zeros. It starts |
| // // out false because we're pulling from the right, and switches |
| // // to true the first time we encounter a non-zero digit |
| // UBool doZeros = FALSE; |
| // for (int32_t i = 0; i < kMaxDecimalDigits; i++) { |
| // int64_t digit = numberToFormat % 10; |
| // if (digit != 0 || doZeros) { |
| // if (doZeros && useSpaces) { |
| // toInsertInto.insert(_pos + getPos(), gSpace); |
| // } |
| // doZeros = TRUE; |
| // getRuleSet()->format(digit, toInsertInto, _pos + getPos()); |
| // } |
| // numberToFormat /= 10; |
| // } |
| |
| DigitList dl; |
| dl.set(number, 20, TRUE); |
| |
| UBool pad = FALSE; |
| while (dl.fCount > (dl.fDecimalAt <= 0 ? 0 : dl.fDecimalAt)) { |
| if (pad && useSpaces) { |
| toInsertInto.insert(_pos + getPos(), gSpace); |
| } else { |
| pad = TRUE; |
| } |
| getRuleSet()->format((int64_t)(dl.fDigits[--dl.fCount] - '0'), toInsertInto, _pos + getPos()); |
| } |
| while (dl.fDecimalAt < 0) { |
| if (pad && useSpaces) { |
| toInsertInto.insert(_pos + getPos(), gSpace); |
| } else { |
| pad = TRUE; |
| } |
| getRuleSet()->format((int64_t)0, toInsertInto, _pos + getPos()); |
| ++dl.fDecimalAt; |
| } |
| |
| if (!pad) { |
| // hack around lack of precision in digitlist. if we would end up with |
| // "foo point" make sure we add a " zero" to the end. |
| getRuleSet()->format((int64_t)0, toInsertInto, _pos + getPos()); |
| } |
| } |
| } |
| |
| //----------------------------------------------------------------------- |
| // parsing |
| //----------------------------------------------------------------------- |
| |
| /** |
| * If in "by digits" mode, parses the string as if it were a string |
| * of individual digits; otherwise, uses the superclass function. |
| * @param text The string to parse |
| * @param parsePosition Ignored on entry, but updated on exit to point |
| * to the first unmatched character |
| * @param baseValue The partial parse result prior to entering this |
| * function |
| * @param upperBound Only consider rules with base values lower than |
| * this when filling in the substitution |
| * @param lenientParse If true, try matching the text as numerals if |
| * matching as words doesn't work |
| * @return If the match was successful, the current partial parse |
| * result; otherwise new Long(0). The result is either a Long or |
| * a Double. |
| */ |
| |
| UBool |
| FractionalPartSubstitution::doParse(const UnicodeString& text, |
| ParsePosition& parsePosition, |
| double baseValue, |
| double /*upperBound*/, |
| UBool lenientParse, |
| Formattable& resVal) const |
| { |
| // if we're not in byDigits mode, we can just use the inherited |
| // doParse() |
| if (!byDigits) { |
| return NFSubstitution::doParse(text, parsePosition, baseValue, 0, lenientParse, resVal); |
| |
| // if we ARE in byDigits mode, parse the text one digit at a time |
| // using this substitution's owning rule set (we do this by setting |
| // upperBound to 10 when calling doParse() ) until we reach |
| // nonmatching text |
| } else { |
| UnicodeString workText(text); |
| ParsePosition workPos(1); |
| double result = 0; |
| int32_t digit; |
| // double p10 = 0.1; |
| |
| DigitList dl; |
| NumberFormat* fmt = NULL; |
| while (workText.length() > 0 && workPos.getIndex() != 0) { |
| workPos.setIndex(0); |
| Formattable temp; |
| getRuleSet()->parse(workText, workPos, 10, temp); |
| UErrorCode status = U_ZERO_ERROR; |
| digit = temp.getLong(status); |
| // digit = temp.getType() == Formattable::kLong ? |
| // temp.getLong() : |
| // (int32_t)temp.getDouble(); |
| |
| if (lenientParse && workPos.getIndex() == 0) { |
| if (!fmt) { |
| status = U_ZERO_ERROR; |
| fmt = NumberFormat::createInstance(status); |
| if (U_FAILURE(status)) { |
| delete fmt; |
| fmt = NULL; |
| } |
| } |
| if (fmt) { |
| fmt->parse(workText, temp, workPos); |
| digit = temp.getLong(status); |
| } |
| } |
| |
| if (workPos.getIndex() != 0) { |
| dl.append((char)('0' + digit)); |
| // result += digit * p10; |
| // p10 /= 10; |
| parsePosition.setIndex(parsePosition.getIndex() + workPos.getIndex()); |
| workText.removeBetween(0, workPos.getIndex()); |
| while (workText.length() > 0 && workText.charAt(0) == gSpace) { |
| workText.removeBetween(0, 1); |
| parsePosition.setIndex(parsePosition.getIndex() + 1); |
| } |
| } |
| } |
| delete fmt; |
| |
| result = dl.fCount == 0 ? 0 : dl.getDouble(); |
| result = composeRuleValue(result, baseValue); |
| resVal.setDouble(result); |
| return TRUE; |
| } |
| } |
| |
| UBool |
| FractionalPartSubstitution::operator==(const NFSubstitution& rhs) const |
| { |
| return NFSubstitution::operator==(rhs) && |
| ((const FractionalPartSubstitution*)&rhs)->byDigits == byDigits; |
| } |
| |
| const char FractionalPartSubstitution::fgClassID = 0; |
| |
| UClassID |
| FractionalPartSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| |
| //=================================================================== |
| // AbsoluteValueSubstitution |
| //=================================================================== |
| |
| const char AbsoluteValueSubstitution::fgClassID = 0; |
| |
| UClassID |
| AbsoluteValueSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| //=================================================================== |
| // NumeratorSubstitution |
| //=================================================================== |
| |
| void |
| NumeratorSubstitution::doSubstitution(double number, UnicodeString& toInsertInto, int32_t apos) const { |
| // perform a transformation on the number being formatted that |
| // is dependent on the type of substitution this is |
| |
| double numberToFormat = transformNumber(number); |
| int64_t longNF = util64_fromDouble(numberToFormat); |
| |
| const NFRuleSet* aruleSet = getRuleSet(); |
| if (withZeros && aruleSet != NULL) { |
| // if there are leading zeros in the decimal expansion then emit them |
| int64_t nf =longNF; |
| int32_t len = toInsertInto.length(); |
| while ((nf *= 10) < denominator) { |
| toInsertInto.insert(apos + getPos(), gSpace); |
| aruleSet->format((int64_t)0, toInsertInto, apos + getPos()); |
| } |
| apos += toInsertInto.length() - len; |
| } |
| |
| // if the result is an integer, from here on out we work in integer |
| // space (saving time and memory and preserving accuracy) |
| if (numberToFormat == longNF && aruleSet != NULL) { |
| aruleSet->format(longNF, toInsertInto, apos + getPos()); |
| |
| // if the result isn't an integer, then call either our rule set's |
| // format() method or our DecimalFormat's format() method to |
| // format the result |
| } else { |
| if (aruleSet != NULL) { |
| aruleSet->format(numberToFormat, toInsertInto, apos + getPos()); |
| } else { |
| UErrorCode status = U_ZERO_ERROR; |
| UnicodeString temp; |
| getNumberFormat()->format(numberToFormat, temp, status); |
| toInsertInto.insert(apos + getPos(), temp); |
| } |
| } |
| } |
| |
| UBool |
| NumeratorSubstitution::doParse(const UnicodeString& text, |
| ParsePosition& parsePosition, |
| double baseValue, |
| double upperBound, |
| UBool /*lenientParse*/, |
| Formattable& result) const |
| { |
| // we don't have to do anything special to do the parsing here, |
| // but we have to turn lenient parsing off-- if we leave it on, |
| // it SERIOUSLY messes up the algorithm |
| |
| // if withZeros is true, we need to count the zeros |
| // and use that to adjust the parse result |
| UErrorCode status = U_ZERO_ERROR; |
| int32_t zeroCount = 0; |
| UnicodeString workText(text); |
| |
| if (withZeros) { |
| ParsePosition workPos(1); |
| Formattable temp; |
| |
| while (workText.length() > 0 && workPos.getIndex() != 0) { |
| workPos.setIndex(0); |
| getRuleSet()->parse(workText, workPos, 1, temp); // parse zero or nothing at all |
| if (workPos.getIndex() == 0) { |
| // we failed, either there were no more zeros, or the number was formatted with digits |
| // either way, we're done |
| break; |
| } |
| |
| ++zeroCount; |
| parsePosition.setIndex(parsePosition.getIndex() + workPos.getIndex()); |
| workText.remove(0, workPos.getIndex()); |
| while (workText.length() > 0 && workText.charAt(0) == gSpace) { |
| workText.remove(0, 1); |
| parsePosition.setIndex(parsePosition.getIndex() + 1); |
| } |
| } |
| |
| workText = text; |
| workText.remove(0, (int32_t)parsePosition.getIndex()); |
| parsePosition.setIndex(0); |
| } |
| |
| // we've parsed off the zeros, now let's parse the rest from our current position |
| NFSubstitution::doParse(workText, parsePosition, withZeros ? 1 : baseValue, upperBound, FALSE, result); |
| |
| if (withZeros) { |
| // any base value will do in this case. is there a way to |
| // force this to not bother trying all the base values? |
| |
| // compute the 'effective' base and prescale the value down |
| int64_t n = result.getLong(status); // force conversion! |
| int64_t d = 1; |
| int32_t pow = 0; |
| while (d <= n) { |
| d *= 10; |
| ++pow; |
| } |
| // now add the zeros |
| while (zeroCount > 0) { |
| d *= 10; |
| --zeroCount; |
| } |
| // d is now our true denominator |
| result.setDouble((double)n/(double)d); |
| } |
| |
| return TRUE; |
| } |
| |
| UBool |
| NumeratorSubstitution::operator==(const NFSubstitution& rhs) const |
| { |
| return NFSubstitution::operator==(rhs) && |
| denominator == ((const NumeratorSubstitution*)&rhs)->denominator; |
| } |
| |
| const char NumeratorSubstitution::fgClassID = 0; |
| |
| UClassID |
| NumeratorSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| const UChar NumeratorSubstitution::LTLT[] = { 0x003c, 0x003c }; |
| |
| //=================================================================== |
| // NullSubstitution |
| //=================================================================== |
| |
| const char NullSubstitution::fgClassID = 0; |
| |
| UClassID |
| NullSubstitution::getDynamicClassID() const { |
| return getStaticClassID(); |
| } |
| |
| U_NAMESPACE_END |
| |
| /* U_HAVE_RBNF */ |
| #endif |
| |
