The Tor Browser: intl/icu/source/i18n/choicfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/choicfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/choicfmt.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
 *******************************************************************************
 * Copyright (C) 1997-2013, International Business Machines Corporation and    *
 * others. All Rights Reserved.                                                *
 *******************************************************************************
 *
 * File CHOICFMT.CPP
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   02/19/97    aliu        Converted from java.
 *   03/20/97    helena      Finished first cut of implementation and got rid
 *                           of nextDouble/previousDouble and replaced with
 *                           boolean array.
 *   4/10/97     aliu        Clean up.  Modified to work on AIX.
 *   06/04/97    helena      Fixed applyPattern(), toPattern() and not to include
 *                           wchar.h.
 *   07/09/97    helena      Made ParsePosition into a class.
 *   08/06/97    nos         removed overloaded constructor, fixed 'format(array)'
 *   07/22/98    stephen     JDK 1.2 Sync - removed UBool array (doubleFlags)
 *   02/22/99    stephen     Removed character literals for EBCDIC safety
 ********************************************************************************
 */
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_FORMATTING
 #include "unicode/choicfmt.h"
 #include "unicode/numfmt.h"
 #include "unicode/locid.h"
 #include "cpputils.h"
 #include "cstring.h"
 #include "messageimpl.h"
 #include "putilimp.h"
 #include "uassert.h"
 #include <stdio.h>
 #include <float.h>
 // *****************************************************************************
 // class ChoiceFormat
 // *****************************************************************************
 U_NAMESPACE_BEGIN
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ChoiceFormat)
 // Special characters used by ChoiceFormat.  There are two characters
 // used interchangeably to indicate <=.  Either is parsed, but only
 // LESS_EQUAL is generated by toPattern().
 #define SINGLE_QUOTE ((UChar)0x0027)   /*'*/
 #define LESS_THAN    ((UChar)0x003C)   /*<*/
 #define LESS_EQUAL   ((UChar)0x0023)   /*#*/
 #define LESS_EQUAL2  ((UChar)0x2264)
 #define VERTICAL_BAR ((UChar)0x007C)   /*|*/
 #define MINUS        ((UChar)0x002D)   /*-*/
 static const UChar LEFT_CURLY_BRACE = 0x7B;     /*{*/
 static const UChar RIGHT_CURLY_BRACE = 0x7D;    /*}*/
 #ifdef INFINITY
 #undef INFINITY
 #endif
 #define INFINITY     ((UChar)0x221E)
 //static const UChar gPositiveInfinity[] = {INFINITY, 0};
 //static const UChar gNegativeInfinity[] = {MINUS, INFINITY, 0};
 #define POSITIVE_INF_STRLEN 1
 #define NEGATIVE_INF_STRLEN 2
 // -------------------------------------
 // Creates a ChoiceFormat instance based on the pattern.
 ChoiceFormat::ChoiceFormat(const UnicodeString& newPattern,
                            UErrorCode& status)
 : constructorErrorCode(status),
   msgPattern(status)
 {
     applyPattern(newPattern, status);
 }
 // -------------------------------------
 // Creates a ChoiceFormat instance with the limit array and
 // format strings for each limit.
 ChoiceFormat::ChoiceFormat(const double* limits,
                            const UnicodeString* formats,
                            int32_t cnt )
 : constructorErrorCode(U_ZERO_ERROR),
   msgPattern(constructorErrorCode)
 {
     setChoices(limits, NULL, formats, cnt, constructorErrorCode);
 }
 // -------------------------------------
 ChoiceFormat::ChoiceFormat(const double* limits,
                            const UBool* closures,
                            const UnicodeString* formats,
                            int32_t cnt )
 : constructorErrorCode(U_ZERO_ERROR),
   msgPattern(constructorErrorCode)
 {
     setChoices(limits, closures, formats, cnt, constructorErrorCode);
 }
 // -------------------------------------
 // copy constructor
 ChoiceFormat::ChoiceFormat(const    ChoiceFormat&   that)
 : NumberFormat(that),
   constructorErrorCode(that.constructorErrorCode),
   msgPattern(that.msgPattern)
 {
 }
 // -------------------------------------
 // Private constructor that creates a
 // ChoiceFormat instance based on the
 // pattern and populates UParseError
 ChoiceFormat::ChoiceFormat(const UnicodeString& newPattern,
                            UParseError& parseError,
                            UErrorCode& status)
 : constructorErrorCode(status),
   msgPattern(status)
 {
     applyPattern(newPattern,parseError, status);
 }
 // -------------------------------------
 UBool
 ChoiceFormat::operator==(const Format& that) const
 {
     if (this == &that) return TRUE;
     if (!NumberFormat::operator==(that)) return FALSE;
     ChoiceFormat& thatAlias = (ChoiceFormat&)that;
     return msgPattern == thatAlias.msgPattern;
 }
 // -------------------------------------
 // copy constructor
 const ChoiceFormat&
 ChoiceFormat::operator=(const   ChoiceFormat& that)
 {
     if (this != &that) {
         NumberFormat::operator=(that);
         constructorErrorCode = that.constructorErrorCode;
         msgPattern = that.msgPattern;
     }
     return *this;
 }
 // -------------------------------------
 ChoiceFormat::~ChoiceFormat()
 {
 }
 // -------------------------------------
 /**
  * Convert a double value to a string without the overhead of NumberFormat.
  */
 UnicodeString&
 ChoiceFormat::dtos(double value,
                    UnicodeString& string)
 {
     /* Buffer to contain the digits and any extra formatting stuff. */
     char temp[DBL_DIG + 16];
     char *itrPtr = temp;
     char *expPtr;
     sprintf(temp, "%.*g", DBL_DIG, value);
     /* Find and convert the decimal point.
        Using setlocale on some machines will cause sprintf to use a comma for certain locales.
     */
     while (*itrPtr && (*itrPtr == '-' || isdigit(*itrPtr))) {
         itrPtr++;
     }
     if (*itrPtr != 0 && *itrPtr != 'e') {
         /* We reached something that looks like a decimal point.
         In case someone used setlocale(), which changes the decimal point. */
         *itrPtr = '.';
         itrPtr++;
     }
     /* Search for the exponent */
     while (*itrPtr && *itrPtr != 'e') {
         itrPtr++;
     }
     if (*itrPtr == 'e') {
         itrPtr++;
         /* Verify the exponent sign */
         if (*itrPtr == '+' || *itrPtr == '-') {
             itrPtr++;
         }
         /* Remove leading zeros. You will see this on Windows machines. */
         expPtr = itrPtr;
         while (*itrPtr == '0') {
             itrPtr++;
         }
         if (*itrPtr && expPtr != itrPtr) {
             /* Shift the exponent without zeros. */
             while (*itrPtr) {
                 *(expPtr++)  = *(itrPtr++);
             }
             // NULL terminate
             *expPtr = 0;
         }
     }
     string = UnicodeString(temp, -1, US_INV);    /* invariant codepage */
     return string;
 }
 // -------------------------------------
 // calls the overloaded applyPattern method.
 void
 ChoiceFormat::applyPattern(const UnicodeString& pattern,
                            UErrorCode& status)
 {
     msgPattern.parseChoiceStyle(pattern, NULL, status);
     constructorErrorCode = status;
 }
 // -------------------------------------
 // Applies the pattern to this ChoiceFormat instance.
 void
 ChoiceFormat::applyPattern(const UnicodeString& pattern,
                            UParseError& parseError,
                            UErrorCode& status)
 {
     msgPattern.parseChoiceStyle(pattern, &parseError, status);
     constructorErrorCode = status;
 }
 // -------------------------------------
 // Returns the input pattern string.
 UnicodeString&
 ChoiceFormat::toPattern(UnicodeString& result) const
 {
     return result = msgPattern.getPatternString();
 }
 // -------------------------------------
 // Sets the limit and format arrays.
 void
 ChoiceFormat::setChoices(  const double* limits,
                            const UnicodeString* formats,
                            int32_t cnt )
 {
     UErrorCode errorCode = U_ZERO_ERROR;
     setChoices(limits, NULL, formats, cnt, errorCode);
 }
 // -------------------------------------
 // Sets the limit and format arrays.
 void
 ChoiceFormat::setChoices(  const double* limits,
                            const UBool* closures,
                            const UnicodeString* formats,
                            int32_t cnt )
 {
     UErrorCode errorCode = U_ZERO_ERROR;
     setChoices(limits, closures, formats, cnt, errorCode);
 }
 void
 ChoiceFormat::setChoices(const double* limits,
                          const UBool* closures,
                          const UnicodeString* formats,
                          int32_t count,
                          UErrorCode &errorCode) {
     if (U_FAILURE(errorCode)) {
         return;
     }
     if (limits == NULL || formats == NULL) {
         errorCode = U_ILLEGAL_ARGUMENT_ERROR;
         return;
     }
     // Reconstruct the original input pattern.
     // Modified version of the pre-ICU 4.8 toPattern() implementation.
     UnicodeString result;
     for (int32_t i = 0; i < count; ++i) {
         if (i != 0) {
             result += VERTICAL_BAR;
         }
         UnicodeString buf;
         if (uprv_isPositiveInfinity(limits[i])) {
             result += INFINITY;
         } else if (uprv_isNegativeInfinity(limits[i])) {
             result += MINUS;
             result += INFINITY;
         } else {
             result += dtos(limits[i], buf);
         }
         if (closures != NULL && closures[i]) {
             result += LESS_THAN;
         } else {
             result += LESS_EQUAL;
         }
         // Append formats[i], using quotes if there are special
         // characters.  Single quotes themselves must be escaped in
         // either case.
         const UnicodeString& text = formats[i];
         int32_t textLength = text.length();
         int32_t nestingLevel = 0;
         for (int32_t j = 0; j < textLength; ++j) {
             UChar c = text[j];
             if (c == SINGLE_QUOTE && nestingLevel == 0) {
                 // Double each top-level apostrophe.
                 result.append(c);
             } else if (c == VERTICAL_BAR && nestingLevel == 0) {
                 // Surround each pipe symbol with apostrophes for quoting.
                 // If the next character is an apostrophe, then that will be doubled,
                 // and although the parser will see the apostrophe pairs beginning
                 // and ending one character earlier than our doubling, the result
                 // is as desired.
                 //   | -> '|'
                 //   |' -> '|'''
                 //   |'' -> '|''''' etc.
                 result.append(SINGLE_QUOTE).append(c).append(SINGLE_QUOTE);
                 continue;  // Skip the append(c) at the end of the loop body.
             } else if (c == LEFT_CURLY_BRACE) {
                 ++nestingLevel;
             } else if (c == RIGHT_CURLY_BRACE && nestingLevel > 0) {
                 --nestingLevel;
             }
             result.append(c);
         }
     }
     // Apply the reconstructed pattern.
     applyPattern(result, errorCode);
 }
 // -------------------------------------
 // Gets the limit array.
 const double*
 ChoiceFormat::getLimits(int32_t& cnt) const
 {
     cnt = 0;
     return NULL;
 }
 // -------------------------------------
 // Gets the closures array.
 const UBool*
 ChoiceFormat::getClosures(int32_t& cnt) const
 {
     cnt = 0;
     return NULL;
 }
 // -------------------------------------
 // Gets the format array.
 const UnicodeString*
 ChoiceFormat::getFormats(int32_t& cnt) const
 {
     cnt = 0;
     return NULL;
 }
 // -------------------------------------
 // Formats an int64 number, it's actually formatted as
 // a double.  The returned format string may differ
 // from the input number because of this.
 UnicodeString&
 ChoiceFormat::format(int64_t number,
                      UnicodeString& appendTo,
                      FieldPosition& status) const
 {
     return format((double) number, appendTo, status);
 }
 // -------------------------------------
 // Formats an int32_t number, it's actually formatted as
 // a double.
 UnicodeString&
 ChoiceFormat::format(int32_t number,
                      UnicodeString& appendTo,
                      FieldPosition& status) const
 {
     return format((double) number, appendTo, status);
 }
 // -------------------------------------
 // Formats a double number.
 UnicodeString&
 ChoiceFormat::format(double number,
                      UnicodeString& appendTo,
                      FieldPosition& /*pos*/) const
 {
     if (msgPattern.countParts() == 0) {
         // No pattern was applied, or it failed.
         return appendTo;
     }
     // Get the appropriate sub-message.
     int32_t msgStart = findSubMessage(msgPattern, 0, number);
     if (!MessageImpl::jdkAposMode(msgPattern)) {
         int32_t patternStart = msgPattern.getPart(msgStart).getLimit();
         int32_t msgLimit = msgPattern.getLimitPartIndex(msgStart);
         appendTo.append(msgPattern.getPatternString(),
                         patternStart,
                         msgPattern.getPatternIndex(msgLimit) - patternStart);
         return appendTo;
     }
     // JDK compatibility mode: Remove SKIP_SYNTAX.
     return MessageImpl::appendSubMessageWithoutSkipSyntax(msgPattern, msgStart, appendTo);
 }
 int32_t
 ChoiceFormat::findSubMessage(const MessagePattern &pattern, int32_t partIndex, double number) {
     int32_t count = pattern.countParts();
     int32_t msgStart;
     // Iterate over (ARG_INT|DOUBLE, ARG_SELECTOR, message) tuples
     // until ARG_LIMIT or end of choice-only pattern.
     // Ignore the first number and selector and start the loop on the first message.
     partIndex += 2;
     for (;;) {
         // Skip but remember the current sub-message.
         msgStart = partIndex;
         partIndex = pattern.getLimitPartIndex(partIndex);
         if (++partIndex >= count) {
             // Reached the end of the choice-only pattern.
             // Return with the last sub-message.
             break;
         }
         const MessagePattern::Part &part = pattern.getPart(partIndex++);
         UMessagePatternPartType type = part.getType();
         if (type == UMSGPAT_PART_TYPE_ARG_LIMIT) {
             // Reached the end of the ChoiceFormat style.
             // Return with the last sub-message.
             break;
         }
         // part is an ARG_INT or ARG_DOUBLE
         U_ASSERT(MessagePattern::Part::hasNumericValue(type));
         double boundary = pattern.getNumericValue(part);
         // Fetch the ARG_SELECTOR character.
         int32_t selectorIndex = pattern.getPatternIndex(partIndex++);
         UChar boundaryChar = pattern.getPatternString().charAt(selectorIndex);
         if (boundaryChar == LESS_THAN ? !(number > boundary) : !(number >= boundary)) {
             // The number is in the interval between the previous boundary and the current one.
             // Return with the sub-message between them.
             // The !(a>b) and !(a>=b) comparisons are equivalent to
             // (a<=b) and (a<b) except they "catch" NaN.
             break;
         }
     }
     return msgStart;
 }
 // -------------------------------------
 // Formats an array of objects. Checks if the data type of the objects
 // to get the right value for formatting.
 UnicodeString&
 ChoiceFormat::format(const Formattable* objs,
                      int32_t cnt,
                      UnicodeString& appendTo,
                      FieldPosition& pos,
                      UErrorCode& status) const
 {
     if(cnt < 0) {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return appendTo;
     }
     if (msgPattern.countParts() == 0) {
         status = U_INVALID_STATE_ERROR;
         return appendTo;
     }
     for (int32_t i = 0; i < cnt; i++) {
         double objDouble = objs[i].getDouble(status);
         if (U_SUCCESS(status)) {
             format(objDouble, appendTo, pos);
         }
     }
     return appendTo;
 }
 // -------------------------------------
 void
 ChoiceFormat::parse(const UnicodeString& text,
                     Formattable& result,
                     ParsePosition& pos) const
 {
     result.setDouble(parseArgument(msgPattern, 0, text, pos));
 }
 double
 ChoiceFormat::parseArgument(
         const MessagePattern &pattern, int32_t partIndex,
         const UnicodeString &source, ParsePosition &pos) {
     // find the best number (defined as the one with the longest parse)
     int32_t start = pos.getIndex();
     int32_t furthest = start;
     double bestNumber = uprv_getNaN();
     double tempNumber = 0.0;
     int32_t count = pattern.countParts();
     while (partIndex < count && pattern.getPartType(partIndex) != UMSGPAT_PART_TYPE_ARG_LIMIT) {
         tempNumber = pattern.getNumericValue(pattern.getPart(partIndex));
         partIndex += 2;  // skip the numeric part and ignore the ARG_SELECTOR
         int32_t msgLimit = pattern.getLimitPartIndex(partIndex);
         int32_t len = matchStringUntilLimitPart(pattern, partIndex, msgLimit, source, start);
         if (len >= 0) {
             int32_t newIndex = start + len;
             if (newIndex > furthest) {
                 furthest = newIndex;
                 bestNumber = tempNumber;
                 if (furthest == source.length()) {
                     break;
                 }
             }
         }
         partIndex = msgLimit + 1;
     }
     if (furthest == start) {
         pos.setErrorIndex(start);
     } else {
         pos.setIndex(furthest);
     }
     return bestNumber;
 }
 int32_t
 ChoiceFormat::matchStringUntilLimitPart(
         const MessagePattern &pattern, int32_t partIndex, int32_t limitPartIndex,
         const UnicodeString &source, int32_t sourceOffset) {
     int32_t matchingSourceLength = 0;
     const UnicodeString &msgString = pattern.getPatternString();
     int32_t prevIndex = pattern.getPart(partIndex).getLimit();
     for (;;) {
         const MessagePattern::Part &part = pattern.getPart(++partIndex);
         if (partIndex == limitPartIndex || part.getType() == UMSGPAT_PART_TYPE_SKIP_SYNTAX) {
             int32_t index = part.getIndex();
             int32_t length = index - prevIndex;
             if (length != 0 && 0 != source.compare(sourceOffset, length, msgString, prevIndex, length)) {
                 return -1;  // mismatch
             }
             matchingSourceLength += length;
             if (partIndex == limitPartIndex) {
                 return matchingSourceLength;
             }
             prevIndex = part.getLimit();  // SKIP_SYNTAX
         }
     }
 }
 // -------------------------------------
 Format*
 ChoiceFormat::clone() const
 {
     ChoiceFormat *aCopy = new ChoiceFormat(*this);
     return aCopy;
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_FORMATTING */
 //eof

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intl/icu/source/i18n/choicfmt.cpp@6474c204b198 (annotated)

intl/icu/source/i18n/choicfmt.cpp