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

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

intl/icu/source/i18n/msgfmt.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:
  * Copyright (c) 1997-2013, International Business Machines Corporation and
  * others. All Rights Reserved.
  ********************************************************************
  *
  * File MSGFMT.CPP
  *
  * Modification History:
  *
  *   Date        Name        Description
  *   02/19/97    aliu        Converted from java.
  *   03/20/97    helena      Finished first cut of implementation.
  *   04/10/97    aliu        Made to work on AIX.  Added stoi to replace wtoi.
  *   06/11/97    helena      Fixed addPattern to take the pattern correctly.
  *   06/17/97    helena      Fixed the getPattern to return the correct pattern.
  *   07/09/97    helena      Made ParsePosition into a class.
  *   02/22/99    stephen     Removed character literals for EBCDIC safety
  *   11/01/09    kirtig      Added SelectFormat
  ********************************************************************/
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_FORMATTING
 #include "unicode/appendable.h"
 #include "unicode/choicfmt.h"
 #include "unicode/datefmt.h"
 #include "unicode/decimfmt.h"
 #include "unicode/localpointer.h"
 #include "unicode/msgfmt.h"
 #include "unicode/plurfmt.h"
 #include "unicode/rbnf.h"
 #include "unicode/selfmt.h"
 #include "unicode/smpdtfmt.h"
 #include "unicode/umsg.h"
 #include "unicode/ustring.h"
 #include "cmemory.h"
 #include "patternprops.h"
 #include "messageimpl.h"
 #include "msgfmt_impl.h"
 #include "plurrule_impl.h"
 #include "uassert.h"
 #include "uelement.h"
 #include "uhash.h"
 #include "ustrfmt.h"
 #include "util.h"
 #include "uvector.h"
 // *****************************************************************************
 // class MessageFormat
 // *****************************************************************************
 #define SINGLE_QUOTE      ((UChar)0x0027)
 #define COMMA             ((UChar)0x002C)
 #define LEFT_CURLY_BRACE  ((UChar)0x007B)
 #define RIGHT_CURLY_BRACE ((UChar)0x007D)
 //---------------------------------------
 // static data
 static const UChar ID_NUMBER[]    = {
 x6E, 0x75, 0x6D, 0x62, 0x65, 0x72, 0  /* "number" */
 };
 static const UChar ID_DATE[]      = {
 x64, 0x61, 0x74, 0x65, 0              /* "date" */
 };
 static const UChar ID_TIME[]      = {
 x74, 0x69, 0x6D, 0x65, 0              /* "time" */
 };
 static const UChar ID_SPELLOUT[]  = {
 x73, 0x70, 0x65, 0x6c, 0x6c, 0x6f, 0x75, 0x74, 0 /* "spellout" */
 };
 static const UChar ID_ORDINAL[]   = {
 x6f, 0x72, 0x64, 0x69, 0x6e, 0x61, 0x6c, 0 /* "ordinal" */
 };
 static const UChar ID_DURATION[]  = {
 x64, 0x75, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0 /* "duration" */
 };
 // MessageFormat Type List  Number, Date, Time or Choice
 static const UChar * const TYPE_IDS[] = {
     ID_NUMBER,
     ID_DATE,
     ID_TIME,
     ID_SPELLOUT,
     ID_ORDINAL,
     ID_DURATION,
     NULL,
 };
 static const UChar ID_EMPTY[]     = {
 /* empty string, used for default so that null can mark end of list */
 };
 static const UChar ID_CURRENCY[]  = {
 x63, 0x75, 0x72, 0x72, 0x65, 0x6E, 0x63, 0x79, 0  /* "currency" */
 };
 static const UChar ID_PERCENT[]   = {
 x70, 0x65, 0x72, 0x63, 0x65, 0x6E, 0x74, 0        /* "percent" */
 };
 static const UChar ID_INTEGER[]   = {
 x69, 0x6E, 0x74, 0x65, 0x67, 0x65, 0x72, 0        /* "integer" */
 };
 // NumberFormat modifier list, default, currency, percent or integer
 static const UChar * const NUMBER_STYLE_IDS[] = {
     ID_EMPTY,
     ID_CURRENCY,
     ID_PERCENT,
     ID_INTEGER,
     NULL,
 };
 static const UChar ID_SHORT[]     = {
 x73, 0x68, 0x6F, 0x72, 0x74, 0        /* "short" */
 };
 static const UChar ID_MEDIUM[]    = {
 x6D, 0x65, 0x64, 0x69, 0x75, 0x6D, 0  /* "medium" */
 };
 static const UChar ID_LONG[]      = {
 x6C, 0x6F, 0x6E, 0x67, 0              /* "long" */
 };
 static const UChar ID_FULL[]      = {
 x66, 0x75, 0x6C, 0x6C, 0              /* "full" */
 };
 // DateFormat modifier list, default, short, medium, long or full
 static const UChar * const DATE_STYLE_IDS[] = {
     ID_EMPTY,
     ID_SHORT,
     ID_MEDIUM,
     ID_LONG,
     ID_FULL,
     NULL,
 };
 static const icu::DateFormat::EStyle DATE_STYLES[] = {
     icu::DateFormat::kDefault,
     icu::DateFormat::kShort,
     icu::DateFormat::kMedium,
     icu::DateFormat::kLong,
     icu::DateFormat::kFull,
 };
 static const int32_t DEFAULT_INITIAL_CAPACITY = 10;
 static const UChar NULL_STRING[] = {
 x6E, 0x75, 0x6C, 0x6C, 0  // "null"
 };
 static const UChar OTHER_STRING[] = {
 x6F, 0x74, 0x68, 0x65, 0x72, 0  // "other"
 };
 U_CDECL_BEGIN
 static UBool U_CALLCONV equalFormatsForHash(const UHashTok key1,
                                             const UHashTok key2) {
     return icu::MessageFormat::equalFormats(key1.pointer, key2.pointer);
 }
 U_CDECL_END
 U_NAMESPACE_BEGIN
 // -------------------------------------
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(MessageFormat)
 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(FormatNameEnumeration)
 //--------------------------------------------------------------------
 /**
  * Convert an integer value to a string and append the result to
  * the given UnicodeString.
  */
 static UnicodeString& itos(int32_t i, UnicodeString& appendTo) {
     UChar temp[16];
     uprv_itou(temp,16,i,10,0); // 10 == radix
     appendTo.append(temp, -1);
     return appendTo;
 }
 // AppendableWrapper: encapsulates the result of formatting, keeping track
 // of the string and its length.
 class AppendableWrapper : public UMemory {
 public:
     AppendableWrapper(Appendable& appendable) : app(appendable), len(0) {
     }
     void append(const UnicodeString& s) {
         app.appendString(s.getBuffer(), s.length());
         len += s.length();
     }
     void append(const UChar* s, const int32_t sLength) {
         app.appendString(s, sLength);
         len += sLength;
     }
     void append(const UnicodeString& s, int32_t start, int32_t length) {
         append(s.tempSubString(start, length));
     }
     void formatAndAppend(const Format* formatter, const Formattable& arg, UErrorCode& ec) {
         UnicodeString s;
         formatter->format(arg, s, ec);
         if (U_SUCCESS(ec)) {
             append(s);
         }
     }
     void formatAndAppend(const Format* formatter, const Formattable& arg,
                          const UnicodeString &argString, UErrorCode& ec) {
         if (!argString.isEmpty()) {
             if (U_SUCCESS(ec)) {
                 append(argString);
             }
         } else {
             formatAndAppend(formatter, arg, ec);
         }
     }
     int32_t length() {
         return len;
     }
 private:
     Appendable& app;
     int32_t len;
 };
 // -------------------------------------
 // Creates a MessageFormat instance based on the pattern.
 MessageFormat::MessageFormat(const UnicodeString& pattern,
                              UErrorCode& success)
 : fLocale(Locale::getDefault()),  // Uses the default locale
   msgPattern(success),
   formatAliases(NULL),
   formatAliasesCapacity(0),
   argTypes(NULL),
   argTypeCount(0),
   argTypeCapacity(0),
   hasArgTypeConflicts(FALSE),
   defaultNumberFormat(NULL),
   defaultDateFormat(NULL),
   cachedFormatters(NULL),
   customFormatArgStarts(NULL),
   pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
   ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
 {
     setLocaleIDs(fLocale.getName(), fLocale.getName());
     applyPattern(pattern, success);
 }
 MessageFormat::MessageFormat(const UnicodeString& pattern,
                              const Locale& newLocale,
                              UErrorCode& success)
 : fLocale(newLocale),
   msgPattern(success),
   formatAliases(NULL),
   formatAliasesCapacity(0),
   argTypes(NULL),
   argTypeCount(0),
   argTypeCapacity(0),
   hasArgTypeConflicts(FALSE),
   defaultNumberFormat(NULL),
   defaultDateFormat(NULL),
   cachedFormatters(NULL),
   customFormatArgStarts(NULL),
   pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
   ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
 {
     setLocaleIDs(fLocale.getName(), fLocale.getName());
     applyPattern(pattern, success);
 }
 MessageFormat::MessageFormat(const UnicodeString& pattern,
                              const Locale& newLocale,
                              UParseError& parseError,
                              UErrorCode& success)
 : fLocale(newLocale),
   msgPattern(success),
   formatAliases(NULL),
   formatAliasesCapacity(0),
   argTypes(NULL),
   argTypeCount(0),
   argTypeCapacity(0),
   hasArgTypeConflicts(FALSE),
   defaultNumberFormat(NULL),
   defaultDateFormat(NULL),
   cachedFormatters(NULL),
   customFormatArgStarts(NULL),
   pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
   ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
 {
     setLocaleIDs(fLocale.getName(), fLocale.getName());
     applyPattern(pattern, parseError, success);
 }
 MessageFormat::MessageFormat(const MessageFormat& that)
 :
   Format(that),
   fLocale(that.fLocale),
   msgPattern(that.msgPattern),
   formatAliases(NULL),
   formatAliasesCapacity(0),
   argTypes(NULL),
   argTypeCount(0),
   argTypeCapacity(0),
   hasArgTypeConflicts(that.hasArgTypeConflicts),
   defaultNumberFormat(NULL),
   defaultDateFormat(NULL),
   cachedFormatters(NULL),
   customFormatArgStarts(NULL),
   pluralProvider(*this, UPLURAL_TYPE_CARDINAL),
   ordinalProvider(*this, UPLURAL_TYPE_ORDINAL)
 {
     // This will take care of creating the hash tables (since they are NULL).
     UErrorCode ec = U_ZERO_ERROR;
     copyObjects(that, ec);
     if (U_FAILURE(ec)) {
         resetPattern();
     }
 }
 MessageFormat::~MessageFormat()
 {
     uhash_close(cachedFormatters);
     uhash_close(customFormatArgStarts);
     uprv_free(argTypes);
     uprv_free(formatAliases);
     delete defaultNumberFormat;
     delete defaultDateFormat;
 }
 //--------------------------------------------------------------------
 // Variable-size array management
 /**
  * Allocate argTypes[] to at least the given capacity and return
  * TRUE if successful.  If not, leave argTypes[] unchanged.
  *
  * If argTypes is NULL, allocate it.  If it is not NULL, enlarge it
  * if necessary to be at least as large as specified.
  */
 UBool MessageFormat::allocateArgTypes(int32_t capacity, UErrorCode& status) {
     if (U_FAILURE(status)) {
         return FALSE;
     }
     if (argTypeCapacity >= capacity) {
         return TRUE;
     }
     if (capacity < DEFAULT_INITIAL_CAPACITY) {
         capacity = DEFAULT_INITIAL_CAPACITY;
     } else if (capacity < 2*argTypeCapacity) {
         capacity = 2*argTypeCapacity;
     }
     Formattable::Type* a = (Formattable::Type*)
             uprv_realloc(argTypes, sizeof(*argTypes) * capacity);
     if (a == NULL) {
         status = U_MEMORY_ALLOCATION_ERROR;
         return FALSE;
     }
     argTypes = a;
     argTypeCapacity = capacity;
     return TRUE;
 }
 // -------------------------------------
 // assignment operator
 const MessageFormat&
 MessageFormat::operator=(const MessageFormat& that)
 {
     if (this != &that) {
         // Calls the super class for assignment first.
         Format::operator=(that);
         setLocale(that.fLocale);
         msgPattern = that.msgPattern;
         hasArgTypeConflicts = that.hasArgTypeConflicts;
         UErrorCode ec = U_ZERO_ERROR;
         copyObjects(that, ec);
         if (U_FAILURE(ec)) {
             resetPattern();
         }
     }
     return *this;
 }
 UBool
 MessageFormat::operator==(const Format& rhs) const
 {
     if (this == &rhs) return TRUE;
     MessageFormat& that = (MessageFormat&)rhs;
     // Check class ID before checking MessageFormat members
     if (!Format::operator==(rhs) ||
         msgPattern != that.msgPattern ||
         fLocale != that.fLocale) {
         return FALSE;
     }
     // Compare hashtables.
     if ((customFormatArgStarts == NULL) != (that.customFormatArgStarts == NULL)) {
         return FALSE;
     }
     if (customFormatArgStarts == NULL) {
         return TRUE;
     }
     UErrorCode ec = U_ZERO_ERROR;
     const int32_t count = uhash_count(customFormatArgStarts);
     const int32_t rhs_count = uhash_count(that.customFormatArgStarts);
     if (count != rhs_count) {
         return FALSE;
     }
     int32_t idx = 0, rhs_idx = 0, pos = -1, rhs_pos = -1;
     for (; idx < count && rhs_idx < rhs_count && U_SUCCESS(ec); ++idx, ++rhs_idx) {
         const UHashElement* cur = uhash_nextElement(customFormatArgStarts, &pos);
         const UHashElement* rhs_cur = uhash_nextElement(that.customFormatArgStarts, &rhs_pos);
         if (cur->key.integer != rhs_cur->key.integer) {
             return FALSE;
         }
         const Format* format = (const Format*)uhash_iget(cachedFormatters, cur->key.integer);
         const Format* rhs_format = (const Format*)uhash_iget(that.cachedFormatters, rhs_cur->key.integer);
         if (*format != *rhs_format) {
             return FALSE;
         }
     }
     return TRUE;
 }
 // -------------------------------------
 // Creates a copy of this MessageFormat, the caller owns the copy.
 Format*
 MessageFormat::clone() const
 {
     return new MessageFormat(*this);
 }
 // -------------------------------------
 // Sets the locale of this MessageFormat object to theLocale.
 void
 MessageFormat::setLocale(const Locale& theLocale)
 {
     if (fLocale != theLocale) {
         delete defaultNumberFormat;
         defaultNumberFormat = NULL;
         delete defaultDateFormat;
         defaultDateFormat = NULL;
         fLocale = theLocale;
         setLocaleIDs(fLocale.getName(), fLocale.getName());
         pluralProvider.reset();
         ordinalProvider.reset();
     }
 }
 // -------------------------------------
 // Gets the locale of this MessageFormat object.
 const Locale&
 MessageFormat::getLocale() const
 {
     return fLocale;
 }
 void
 MessageFormat::applyPattern(const UnicodeString& newPattern,
                             UErrorCode& status)
 {
     UParseError parseError;
     applyPattern(newPattern,parseError,status);
 }
 // -------------------------------------
 // Applies the new pattern and returns an error if the pattern
 // is not correct.
 void
 MessageFormat::applyPattern(const UnicodeString& pattern,
                             UParseError& parseError,
                             UErrorCode& ec)
 {
     if(U_FAILURE(ec)) {
         return;
     }
     msgPattern.parse(pattern, &parseError, ec);
     cacheExplicitFormats(ec);
     if (U_FAILURE(ec)) {
         resetPattern();
     }
 }
 void MessageFormat::resetPattern() {
     msgPattern.clear();
     uhash_close(cachedFormatters);
     cachedFormatters = NULL;
     uhash_close(customFormatArgStarts);
     customFormatArgStarts = NULL;
     argTypeCount = 0;
     hasArgTypeConflicts = FALSE;
 }
 void
 MessageFormat::applyPattern(const UnicodeString& pattern,
                             UMessagePatternApostropheMode aposMode,
                             UParseError* parseError,
                             UErrorCode& status) {
     if (aposMode != msgPattern.getApostropheMode()) {
         msgPattern.clearPatternAndSetApostropheMode(aposMode);
     }
     applyPattern(pattern, *parseError, status);
 }
 // -------------------------------------
 // Converts this MessageFormat instance to a pattern.
 UnicodeString&
 MessageFormat::toPattern(UnicodeString& appendTo) const {
     if ((customFormatArgStarts != NULL && 0 != uhash_count(customFormatArgStarts)) ||
 == msgPattern.countParts()
     ) {
         appendTo.setToBogus();
         return appendTo;
     }
     return appendTo.append(msgPattern.getPatternString());
 }
 int32_t MessageFormat::nextTopLevelArgStart(int32_t partIndex) const {
     if (partIndex != 0) {
         partIndex = msgPattern.getLimitPartIndex(partIndex);
     }
     for (;;) {
         UMessagePatternPartType type = msgPattern.getPartType(++partIndex);
         if (type == UMSGPAT_PART_TYPE_ARG_START) {
             return partIndex;
         }
         if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
             return -1;
         }
     }
 }
 void MessageFormat::setArgStartFormat(int32_t argStart,
                                       Format* formatter,
                                       UErrorCode& status) {
     if (U_FAILURE(status)) {
         delete formatter;
         return;
     }
     if (cachedFormatters == NULL) {
         cachedFormatters=uhash_open(uhash_hashLong, uhash_compareLong,
                                     equalFormatsForHash, &status);
         if (U_FAILURE(status)) {
             delete formatter;
             return;
         }
         uhash_setValueDeleter(cachedFormatters, uprv_deleteUObject);
     }
     if (formatter == NULL) {
         formatter = new DummyFormat();
     }
     uhash_iput(cachedFormatters, argStart, formatter, &status);
 }
 UBool MessageFormat::argNameMatches(int32_t partIndex, const UnicodeString& argName, int32_t argNumber) {
     const MessagePattern::Part& part = msgPattern.getPart(partIndex);
     return part.getType() == UMSGPAT_PART_TYPE_ARG_NAME ?
         msgPattern.partSubstringMatches(part, argName) :
         part.getValue() == argNumber;  // ARG_NUMBER
 }
 // Sets a custom formatter for a MessagePattern ARG_START part index.
 // "Custom" formatters are provided by the user via setFormat() or similar APIs.
 void MessageFormat::setCustomArgStartFormat(int32_t argStart,
                                             Format* formatter,
                                             UErrorCode& status) {
     setArgStartFormat(argStart, formatter, status);
     if (customFormatArgStarts == NULL) {
         customFormatArgStarts=uhash_open(uhash_hashLong, uhash_compareLong,
                                          NULL, &status);
     }
     uhash_iputi(customFormatArgStarts, argStart, 1, &status);
 }
 Format* MessageFormat::getCachedFormatter(int32_t argumentNumber) const {
     if (cachedFormatters == NULL) {
         return NULL;
     }
     void* ptr = uhash_iget(cachedFormatters, argumentNumber);
     if (ptr != NULL && dynamic_cast<DummyFormat*>((Format*)ptr) == NULL) {
         return (Format*) ptr;
     } else {
         // Not cached, or a DummyFormat representing setFormat(NULL).
         return NULL;
     }
 }
 // -------------------------------------
 // Adopts the new formats array and updates the array count.
 // This MessageFormat instance owns the new formats.
 void
 MessageFormat::adoptFormats(Format** newFormats,
                             int32_t count) {
     if (newFormats == NULL || count < 0) {
         return;
     }
     // Throw away any cached formatters.
     if (cachedFormatters != NULL) {
         uhash_removeAll(cachedFormatters);
     }
     if (customFormatArgStarts != NULL) {
         uhash_removeAll(customFormatArgStarts);
     }
     int32_t formatNumber = 0;
     UErrorCode status = U_ZERO_ERROR;
     for (int32_t partIndex = 0;
         formatNumber < count && U_SUCCESS(status) &&
             (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
         setCustomArgStartFormat(partIndex, newFormats[formatNumber], status);
         ++formatNumber;
     }
     // Delete those that didn't get used (if any).
     for (; formatNumber < count; ++formatNumber) {
         delete newFormats[formatNumber];
     }
 }
 // -------------------------------------
 // Sets the new formats array and updates the array count.
 // This MessageFormat instance maks a copy of the new formats.
 void
 MessageFormat::setFormats(const Format** newFormats,
                           int32_t count) {
     if (newFormats == NULL || count < 0) {
         return;
     }
     // Throw away any cached formatters.
     if (cachedFormatters != NULL) {
         uhash_removeAll(cachedFormatters);
     }
     if (customFormatArgStarts != NULL) {
         uhash_removeAll(customFormatArgStarts);
     }
     UErrorCode status = U_ZERO_ERROR;
     int32_t formatNumber = 0;
     for (int32_t partIndex = 0;
         formatNumber < count && U_SUCCESS(status) && (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
       Format* newFormat = NULL;
       if (newFormats[formatNumber] != NULL) {
           newFormat = newFormats[formatNumber]->clone();
           if (newFormat == NULL) {
               status = U_MEMORY_ALLOCATION_ERROR;
           }
       }
       setCustomArgStartFormat(partIndex, newFormat, status);
       ++formatNumber;
     }
     if (U_FAILURE(status)) {
         resetPattern();
     }
 }
 // -------------------------------------
 // Adopt a single format by format number.
 // Do nothing if the format number is not less than the array count.
 void
 MessageFormat::adoptFormat(int32_t n, Format *newFormat) {
     LocalPointer<Format> p(newFormat);
     if (n >= 0) {
         int32_t formatNumber = 0;
         for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
             if (n == formatNumber) {
                 UErrorCode status = U_ZERO_ERROR;
                 setCustomArgStartFormat(partIndex, p.orphan(), status);
                 return;
             }
             ++formatNumber;
         }
     }
 }
 // -------------------------------------
 // Adopt a single format by format name.
 // Do nothing if there is no match of formatName.
 void
 MessageFormat::adoptFormat(const UnicodeString& formatName,
                            Format* formatToAdopt,
                            UErrorCode& status) {
     LocalPointer<Format> p(formatToAdopt);
     if (U_FAILURE(status)) {
         return;
     }
     int32_t argNumber = MessagePattern::validateArgumentName(formatName);
     if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return;
     }
     for (int32_t partIndex = 0;
         (partIndex = nextTopLevelArgStart(partIndex)) >= 0 && U_SUCCESS(status);
     ) {
         if (argNameMatches(partIndex + 1, formatName, argNumber)) {
             Format* f;
             if (p.isValid()) {
                 f = p.orphan();
             } else if (formatToAdopt == NULL) {
                 f = NULL;
             } else {
                 f = formatToAdopt->clone();
                 if (f == NULL) {
                     status = U_MEMORY_ALLOCATION_ERROR;
                     return;
                 }
             }
             setCustomArgStartFormat(partIndex, f, status);
         }
     }
 }
 // -------------------------------------
 // Set a single format.
 // Do nothing if the variable is not less than the array count.
 void
 MessageFormat::setFormat(int32_t n, const Format& newFormat) {
     if (n >= 0) {
         int32_t formatNumber = 0;
         for (int32_t partIndex = 0;
              (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
             if (n == formatNumber) {
                 Format* new_format = newFormat.clone();
                 if (new_format) {
                     UErrorCode status = U_ZERO_ERROR;
                     setCustomArgStartFormat(partIndex, new_format, status);
                 }
                 return;
             }
             ++formatNumber;
         }
     }
 }
 // -------------------------------------
 // Get a single format by format name.
 // Do nothing if the variable is not less than the array count.
 Format *
 MessageFormat::getFormat(const UnicodeString& formatName, UErrorCode& status) {
     if (U_FAILURE(status) || cachedFormatters == NULL) return NULL;
     int32_t argNumber = MessagePattern::validateArgumentName(formatName);
     if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return NULL;
     }
     for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
         if (argNameMatches(partIndex + 1, formatName, argNumber)) {
             return getCachedFormatter(partIndex);
         }
     }
     return NULL;
 }
 // -------------------------------------
 // Set a single format by format name
 // Do nothing if the variable is not less than the array count.
 void
 MessageFormat::setFormat(const UnicodeString& formatName,
                          const Format& newFormat,
                          UErrorCode& status) {
     if (U_FAILURE(status)) return;
     int32_t argNumber = MessagePattern::validateArgumentName(formatName);
     if (argNumber < UMSGPAT_ARG_NAME_NOT_NUMBER) {
         status = U_ILLEGAL_ARGUMENT_ERROR;
         return;
     }
     for (int32_t partIndex = 0;
         (partIndex = nextTopLevelArgStart(partIndex)) >= 0 && U_SUCCESS(status);
     ) {
         if (argNameMatches(partIndex + 1, formatName, argNumber)) {
             if (&newFormat == NULL) {
                 setCustomArgStartFormat(partIndex, NULL, status);
             } else {
                 Format* new_format = newFormat.clone();
                 if (new_format == NULL) {
                     status = U_MEMORY_ALLOCATION_ERROR;
                     return;
                 }
                 setCustomArgStartFormat(partIndex, new_format, status);
             }
         }
     }
 }
 // -------------------------------------
 // Gets the format array.
 const Format**
 MessageFormat::getFormats(int32_t& cnt) const
 {
     // This old API returns an array (which we hold) of Format*
     // pointers.  The array is valid up to the next call to any
     // method on this object.  We construct and resize an array
     // on demand that contains aliases to the subformats[i].format
     // pointers.
     MessageFormat* t = const_cast<MessageFormat*> (this);
     cnt = 0;
     if (formatAliases == NULL) {
         t->formatAliasesCapacity = (argTypeCount<10) ? 10 : argTypeCount;
         Format** a = (Format**)
             uprv_malloc(sizeof(Format*) * formatAliasesCapacity);
         if (a == NULL) {
             t->formatAliasesCapacity = 0;
             return NULL;
         }
         t->formatAliases = a;
     } else if (argTypeCount > formatAliasesCapacity) {
         Format** a = (Format**)
             uprv_realloc(formatAliases, sizeof(Format*) * argTypeCount);
         if (a == NULL) {
             t->formatAliasesCapacity = 0;
             return NULL;
         }
         t->formatAliases = a;
         t->formatAliasesCapacity = argTypeCount;
     }
     for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
         t->formatAliases[cnt++] = getCachedFormatter(partIndex);
     }
     return (const Format**)formatAliases;
 }
 UnicodeString MessageFormat::getArgName(int32_t partIndex) {
     const MessagePattern::Part& part = msgPattern.getPart(partIndex);
     return msgPattern.getSubstring(part);
 }
 StringEnumeration*
 MessageFormat::getFormatNames(UErrorCode& status) {
     if (U_FAILURE(status))  return NULL;
     UVector *fFormatNames = new UVector(status);
     if (U_FAILURE(status)) {
         status = U_MEMORY_ALLOCATION_ERROR;
         return NULL;
     }
     fFormatNames->setDeleter(uprv_deleteUObject);
     for (int32_t partIndex = 0; (partIndex = nextTopLevelArgStart(partIndex)) >= 0;) {
         fFormatNames->addElement(new UnicodeString(getArgName(partIndex + 1)), status);
     }
     StringEnumeration* nameEnumerator = new FormatNameEnumeration(fFormatNames, status);
     return nameEnumerator;
 }
 // -------------------------------------
 // Formats the source Formattable array and copy into the result buffer.
 // Ignore the FieldPosition result for error checking.
 UnicodeString&
 MessageFormat::format(const Formattable* source,
                       int32_t cnt,
                       UnicodeString& appendTo,
                       FieldPosition& ignore,
                       UErrorCode& success) const
 {
     return format(source, NULL, cnt, appendTo, &ignore, success);
 }
 // -------------------------------------
 // Internally creates a MessageFormat instance based on the
 // pattern and formats the arguments Formattable array and
 // copy into the appendTo buffer.
 UnicodeString&
 MessageFormat::format(  const UnicodeString& pattern,
                         const Formattable* arguments,
                         int32_t cnt,
                         UnicodeString& appendTo,
                         UErrorCode& success)
 {
     MessageFormat temp(pattern, success);
     return temp.format(arguments, NULL, cnt, appendTo, NULL, success);
 }
 // -------------------------------------
 // Formats the source Formattable object and copy into the
 // appendTo buffer.  The Formattable object must be an array
 // of Formattable instances, returns error otherwise.
 UnicodeString&
 MessageFormat::format(const Formattable& source,
                       UnicodeString& appendTo,
                       FieldPosition& ignore,
                       UErrorCode& success) const
 {
     if (U_FAILURE(success))
         return appendTo;
     if (source.getType() != Formattable::kArray) {
         success = U_ILLEGAL_ARGUMENT_ERROR;
         return appendTo;
     }
     int32_t cnt;
     const Formattable* tmpPtr = source.getArray(cnt);
     return format(tmpPtr, NULL, cnt, appendTo, &ignore, success);
 }
 UnicodeString&
 MessageFormat::format(const UnicodeString* argumentNames,
                       const Formattable* arguments,
                       int32_t count,
                       UnicodeString& appendTo,
                       UErrorCode& success) const {
     return format(arguments, argumentNames, count, appendTo, NULL, success);
 }
 // Does linear search to find the match for an ArgName.
 const Formattable* MessageFormat::getArgFromListByName(const Formattable* arguments,
                                                        const UnicodeString *argumentNames,
                                                        int32_t cnt, UnicodeString& name) const {
     for (int32_t i = 0; i < cnt; ++i) {
         if (0 == argumentNames[i].compare(name)) {
             return arguments + i;
         }
     }
     return NULL;
 }
 UnicodeString&
 MessageFormat::format(const Formattable* arguments,
                       const UnicodeString *argumentNames,
                       int32_t cnt,
                       UnicodeString& appendTo,
                       FieldPosition* pos,
                       UErrorCode& status) const {
     if (U_FAILURE(status)) {
         return appendTo;
     }
     UnicodeStringAppendable usapp(appendTo);
     AppendableWrapper app(usapp);
     format(0, NULL, arguments, argumentNames, cnt, app, pos, status);
     return appendTo;
 }
 namespace {
 /**
  * Mutable input/output values for the PluralSelectorProvider.
  * Separate so that it is possible to make MessageFormat Freezable.
  */
 class PluralSelectorContext {
 public:
     PluralSelectorContext(int32_t start, const UnicodeString &name,
                           const Formattable &num, double off, UErrorCode &errorCode)
             : startIndex(start), argName(name), offset(off),
               numberArgIndex(-1), formatter(NULL), forReplaceNumber(FALSE) {
         // number needs to be set even when select() is not called.
         // Keep it as a Number/Formattable:
         // For format() methods, and to preserve information (e.g., BigDecimal).
         if(off == 0) {
             number = num;
         } else {
             number = num.getDouble(errorCode) - off;
         }
     }
     // Input values for plural selection with decimals.
     int32_t startIndex;
     const UnicodeString &argName;
     /** argument number - plural offset */
     Formattable number;
     double offset;
     // Output values for plural selection with decimals.
     /** -1 if REPLACE_NUMBER, 0 arg not found, >0 ARG_START index */
     int32_t numberArgIndex;
     const Format *formatter;
     /** formatted argument number - plural offset */
     UnicodeString numberString;
     /** TRUE if number-offset was formatted with the stock number formatter */
     UBool forReplaceNumber;
 };
 }  // namespace
 // if argumentNames is NULL, this means arguments is a numeric array.
 // arguments can not be NULL.
 // We use const void *plNumber rather than const PluralSelectorContext *pluralNumber
 // so that we need not declare the PluralSelectorContext in the public header file.
 void MessageFormat::format(int32_t msgStart, const void *plNumber,
                            const Formattable* arguments,
                            const UnicodeString *argumentNames,
                            int32_t cnt,
                            AppendableWrapper& appendTo,
                            FieldPosition* ignore,
                            UErrorCode& success) const {
     if (U_FAILURE(success)) {
         return;
     }
     const UnicodeString& msgString = msgPattern.getPatternString();
     int32_t prevIndex = msgPattern.getPart(msgStart).getLimit();
     for (int32_t i = msgStart + 1; U_SUCCESS(success) ; ++i) {
         const MessagePattern::Part* part = &msgPattern.getPart(i);
         const UMessagePatternPartType type = part->getType();
         int32_t index = part->getIndex();
         appendTo.append(msgString, prevIndex, index - prevIndex);
         if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
             return;
         }
         prevIndex = part->getLimit();
         if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
             const PluralSelectorContext &pluralNumber =
                 *static_cast<const PluralSelectorContext *>(plNumber);
             if(pluralNumber.forReplaceNumber) {
                 // number-offset was already formatted.
                 appendTo.formatAndAppend(pluralNumber.formatter,
                         pluralNumber.number, pluralNumber.numberString, success);
             } else {
                 const NumberFormat* nf = getDefaultNumberFormat(success);
                 appendTo.formatAndAppend(nf, pluralNumber.number, success);
             }
             continue;
         }
         if (type != UMSGPAT_PART_TYPE_ARG_START) {
             continue;
         }
         int32_t argLimit = msgPattern.getLimitPartIndex(i);
         UMessagePatternArgType argType = part->getArgType();
         part = &msgPattern.getPart(++i);
         const Formattable* arg;
         UBool noArg = FALSE;
         UnicodeString argName = msgPattern.getSubstring(*part);
         if (argumentNames == NULL) {
             int32_t argNumber = part->getValue();  // ARG_NUMBER
             if (0 <= argNumber && argNumber < cnt) {
                 arg = arguments + argNumber;
             } else {
                 arg = NULL;
                 noArg = TRUE;
             }
         } else {
             arg = getArgFromListByName(arguments, argumentNames, cnt, argName);
             if (arg == NULL) {
                 noArg = TRUE;
             }
         }
         ++i;
         int32_t prevDestLength = appendTo.length();
         const Format* formatter = NULL;
         if (noArg) {
             appendTo.append(
                 UnicodeString(LEFT_CURLY_BRACE).append(argName).append(RIGHT_CURLY_BRACE));
         } else if (arg == NULL) {
             appendTo.append(NULL_STRING, 4);
         } else if(plNumber!=NULL &&
                 static_cast<const PluralSelectorContext *>(plNumber)->numberArgIndex==(i-2)) {
             const PluralSelectorContext &pluralNumber =
                 *static_cast<const PluralSelectorContext *>(plNumber);
             if(pluralNumber.offset == 0) {
                 // The number was already formatted with this formatter.
                 appendTo.formatAndAppend(pluralNumber.formatter, pluralNumber.number,
                                          pluralNumber.numberString, success);
             } else {
                 // Do not use the formatted (number-offset) string for a named argument
                 // that formats the number without subtracting the offset.
                 appendTo.formatAndAppend(pluralNumber.formatter, *arg, success);
             }
         } else if ((formatter = getCachedFormatter(i -2))) {
             // Handles all ArgType.SIMPLE, and formatters from setFormat() and its siblings.
             if (dynamic_cast<const ChoiceFormat*>(formatter) ||
                 dynamic_cast<const PluralFormat*>(formatter) ||
                 dynamic_cast<const SelectFormat*>(formatter)) {
                 // We only handle nested formats here if they were provided via
                 // setFormat() or its siblings. Otherwise they are not cached and instead
                 // handled below according to argType.
                 UnicodeString subMsgString;
                 formatter->format(*arg, subMsgString, success);
                 if (subMsgString.indexOf(LEFT_CURLY_BRACE) >= 0 ||
                     (subMsgString.indexOf(SINGLE_QUOTE) >= 0 && !MessageImpl::jdkAposMode(msgPattern))
                 ) {
                     MessageFormat subMsgFormat(subMsgString, fLocale, success);
                     subMsgFormat.format(0, NULL, arguments, argumentNames, cnt, appendTo, ignore, success);
                 } else {
                     appendTo.append(subMsgString);
                 }
             } else {
                 appendTo.formatAndAppend(formatter, *arg, success);
             }
         } else if (argType == UMSGPAT_ARG_TYPE_NONE || (cachedFormatters && uhash_iget(cachedFormatters, i - 2))) {
             // We arrive here if getCachedFormatter returned NULL, but there was actually an element in the hash table.
             // This can only happen if the hash table contained a DummyFormat, so the if statement above is a check
             // for the hash table containind DummyFormat.
             if (arg->isNumeric()) {
                 const NumberFormat* nf = getDefaultNumberFormat(success);
                 appendTo.formatAndAppend(nf, *arg, success);
             } else if (arg->getType() == Formattable::kDate) {
                 const DateFormat* df = getDefaultDateFormat(success);
                 appendTo.formatAndAppend(df, *arg, success);
             } else {
                 appendTo.append(arg->getString(success));
             }
         } else if (argType == UMSGPAT_ARG_TYPE_CHOICE) {
             if (!arg->isNumeric()) {
                 success = U_ILLEGAL_ARGUMENT_ERROR;
                 return;
             }
             // We must use the Formattable::getDouble() variant with the UErrorCode parameter
             // because only this one converts non-double numeric types to double.
             const double number = arg->getDouble(success);
             int32_t subMsgStart = ChoiceFormat::findSubMessage(msgPattern, i, number);
             formatComplexSubMessage(subMsgStart, NULL, arguments, argumentNames,
                                     cnt, appendTo, success);
         } else if (UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE(argType)) {
             if (!arg->isNumeric()) {
                 success = U_ILLEGAL_ARGUMENT_ERROR;
                 return;
             }
             const PluralSelectorProvider &selector =
                 argType == UMSGPAT_ARG_TYPE_PLURAL ? pluralProvider : ordinalProvider;
             // We must use the Formattable::getDouble() variant with the UErrorCode parameter
             // because only this one converts non-double numeric types to double.
             double offset = msgPattern.getPluralOffset(i);
             PluralSelectorContext context(i, argName, *arg, offset, success);
             int32_t subMsgStart = PluralFormat::findSubMessage(
                     msgPattern, i, selector, &context, arg->getDouble(success), success);
             formatComplexSubMessage(subMsgStart, &context, arguments, argumentNames,
                                     cnt, appendTo, success);
         } else if (argType == UMSGPAT_ARG_TYPE_SELECT) {
             int32_t subMsgStart = SelectFormat::findSubMessage(msgPattern, i, arg->getString(success), success);
             formatComplexSubMessage(subMsgStart, NULL, arguments, argumentNames,
                                     cnt, appendTo, success);
         } else {
             // This should never happen.
             success = U_INTERNAL_PROGRAM_ERROR;
             return;
         }
         ignore = updateMetaData(appendTo, prevDestLength, ignore, arg);
         prevIndex = msgPattern.getPart(argLimit).getLimit();
         i = argLimit;
     }
 }
 void MessageFormat::formatComplexSubMessage(int32_t msgStart,
                                             const void *plNumber,
                                             const Formattable* arguments,
                                             const UnicodeString *argumentNames,
                                             int32_t cnt,
                                             AppendableWrapper& appendTo,
                                             UErrorCode& success) const {
     if (U_FAILURE(success)) {
         return;
     }
     if (!MessageImpl::jdkAposMode(msgPattern)) {
         format(msgStart, plNumber, arguments, argumentNames, cnt, appendTo, NULL, success);
         return;
     }
     // JDK compatibility mode: (see JDK MessageFormat.format() API docs)
     // - remove SKIP_SYNTAX; that is, remove half of the apostrophes
     // - if the result string contains an open curly brace '{' then
     //   instantiate a temporary MessageFormat object and format again;
     //   otherwise just append the result string
     const UnicodeString& msgString = msgPattern.getPatternString();
     UnicodeString sb;
     int32_t prevIndex = msgPattern.getPart(msgStart).getLimit();
     for (int32_t i = msgStart;;) {
         const MessagePattern::Part& part = msgPattern.getPart(++i);
         const UMessagePatternPartType type = part.getType();
         int32_t index = part.getIndex();
         if (type == UMSGPAT_PART_TYPE_MSG_LIMIT) {
             sb.append(msgString, prevIndex, index - prevIndex);
             break;
         } else if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER || type == UMSGPAT_PART_TYPE_SKIP_SYNTAX) {
             sb.append(msgString, prevIndex, index - prevIndex);
             if (type == UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
                 const PluralSelectorContext &pluralNumber =
                     *static_cast<const PluralSelectorContext *>(plNumber);
                 if(pluralNumber.forReplaceNumber) {
                     // number-offset was already formatted.
                     sb.append(pluralNumber.numberString);
                 } else {
                     const NumberFormat* nf = getDefaultNumberFormat(success);
                     sb.append(nf->format(pluralNumber.number, sb, success));
                 }
             }
             prevIndex = part.getLimit();
         } else if (type == UMSGPAT_PART_TYPE_ARG_START) {
             sb.append(msgString, prevIndex, index - prevIndex);
             prevIndex = index;
             i = msgPattern.getLimitPartIndex(i);
             index = msgPattern.getPart(i).getLimit();
             MessageImpl::appendReducedApostrophes(msgString, prevIndex, index, sb);
             prevIndex = index;
         }
     }
     if (sb.indexOf(LEFT_CURLY_BRACE) >= 0) {
         UnicodeString emptyPattern;  // gcc 3.3.3 fails with "UnicodeString()" as the first parameter.
         MessageFormat subMsgFormat(emptyPattern, fLocale, success);
         subMsgFormat.applyPattern(sb, UMSGPAT_APOS_DOUBLE_REQUIRED, NULL, success);
         subMsgFormat.format(0, NULL, arguments, argumentNames, cnt, appendTo, NULL, success);
     } else {
         appendTo.append(sb);
     }
 }
 UnicodeString MessageFormat::getLiteralStringUntilNextArgument(int32_t from) const {
     const UnicodeString& msgString=msgPattern.getPatternString();
     int32_t prevIndex=msgPattern.getPart(from).getLimit();
     UnicodeString b;
     for (int32_t i = from + 1; ; ++i) {
         const MessagePattern::Part& part = msgPattern.getPart(i);
         const UMessagePatternPartType type=part.getType();
         int32_t index=part.getIndex();
         b.append(msgString, prevIndex, index - prevIndex);
         if(type==UMSGPAT_PART_TYPE_ARG_START || type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
             return b;
         }
         // Unexpected Part "part" in parsed message.
         U_ASSERT(type==UMSGPAT_PART_TYPE_SKIP_SYNTAX || type==UMSGPAT_PART_TYPE_INSERT_CHAR);
         prevIndex=part.getLimit();
     }
 }
 FieldPosition* MessageFormat::updateMetaData(AppendableWrapper& /*dest*/, int32_t /*prevLength*/,
                              FieldPosition* /*fp*/, const Formattable* /*argId*/) const {
     // Unlike in Java, there are no field attributes defined for MessageFormat. Do nothing.
     return NULL;
     /*
       if (fp != NULL && Field.ARGUMENT.equals(fp.getFieldAttribute())) {
           fp->setBeginIndex(prevLength);
           fp->setEndIndex(dest.get_length());
           return NULL;
       }
       return fp;
     */
 }
 int32_t
 MessageFormat::findOtherSubMessage(int32_t partIndex) const {
     int32_t count=msgPattern.countParts();
     const MessagePattern::Part *part = &msgPattern.getPart(partIndex);
     if(MessagePattern::Part::hasNumericValue(part->getType())) {
         ++partIndex;
     }
     // Iterate over (ARG_SELECTOR [ARG_INT|ARG_DOUBLE] message) tuples
     // until ARG_LIMIT or end of plural-only pattern.
     UnicodeString other(FALSE, OTHER_STRING, 5);
     do {
         part=&msgPattern.getPart(partIndex++);
         UMessagePatternPartType type=part->getType();
         if(type==UMSGPAT_PART_TYPE_ARG_LIMIT) {
             break;
         }
         U_ASSERT(type==UMSGPAT_PART_TYPE_ARG_SELECTOR);
         // part is an ARG_SELECTOR followed by an optional explicit value, and then a message
         if(msgPattern.partSubstringMatches(*part, other)) {
             return partIndex;
         }
         if(MessagePattern::Part::hasNumericValue(msgPattern.getPartType(partIndex))) {
             ++partIndex;  // skip the numeric-value part of "=1" etc.
         }
         partIndex=msgPattern.getLimitPartIndex(partIndex);
     } while(++partIndex<count);
     return 0;
 }
 int32_t
 MessageFormat::findFirstPluralNumberArg(int32_t msgStart, const UnicodeString &argName) const {
     for(int32_t i=msgStart+1;; ++i) {
         const MessagePattern::Part &part=msgPattern.getPart(i);
         UMessagePatternPartType type=part.getType();
         if(type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
             return 0;
         }
         if(type==UMSGPAT_PART_TYPE_REPLACE_NUMBER) {
             return -1;
         }
         if(type==UMSGPAT_PART_TYPE_ARG_START) {
             UMessagePatternArgType argType=part.getArgType();
             if(!argName.isEmpty() && (argType==UMSGPAT_ARG_TYPE_NONE || argType==UMSGPAT_ARG_TYPE_SIMPLE)) {
                 // ARG_NUMBER or ARG_NAME
                 if(msgPattern.partSubstringMatches(msgPattern.getPart(i+1), argName)) {
                     return i;
                 }
             }
             i=msgPattern.getLimitPartIndex(i);
         }
     }
 }
 void MessageFormat::copyObjects(const MessageFormat& that, UErrorCode& ec) {
     // Deep copy pointer fields.
     // We need not copy the formatAliases because they are re-filled
     // in each getFormats() call.
     // The defaultNumberFormat, defaultDateFormat and pluralProvider.rules
     // also get created on demand.
     argTypeCount = that.argTypeCount;
     if (argTypeCount > 0) {
         if (!allocateArgTypes(argTypeCount, ec)) {
             return;
         }
         uprv_memcpy(argTypes, that.argTypes, argTypeCount * sizeof(argTypes[0]));
     }
     if (cachedFormatters != NULL) {
         uhash_removeAll(cachedFormatters);
     }
     if (customFormatArgStarts != NULL) {
         uhash_removeAll(customFormatArgStarts);
     }
     if (that.cachedFormatters) {
         if (cachedFormatters == NULL) {
             cachedFormatters=uhash_open(uhash_hashLong, uhash_compareLong,
                                         equalFormatsForHash, &ec);
             if (U_FAILURE(ec)) {
                 return;
             }
             uhash_setValueDeleter(cachedFormatters, uprv_deleteUObject);
         }
         const int32_t count = uhash_count(that.cachedFormatters);
         int32_t pos, idx;
         for (idx = 0, pos = -1; idx < count && U_SUCCESS(ec); ++idx) {
             const UHashElement* cur = uhash_nextElement(that.cachedFormatters, &pos);
             Format* newFormat = ((Format*)(cur->value.pointer))->clone();
             if (newFormat) {
                 uhash_iput(cachedFormatters, cur->key.integer, newFormat, &ec);
             } else {
                 ec = U_MEMORY_ALLOCATION_ERROR;
                 return;
             }
         }
     }
     if (that.customFormatArgStarts) {
         if (customFormatArgStarts == NULL) {
             customFormatArgStarts=uhash_open(uhash_hashLong, uhash_compareLong,
                                               NULL, &ec);
         }
         const int32_t count = uhash_count(that.customFormatArgStarts);
         int32_t pos, idx;
         for (idx = 0, pos = -1; idx < count && U_SUCCESS(ec); ++idx) {
             const UHashElement* cur = uhash_nextElement(that.customFormatArgStarts, &pos);
             uhash_iputi(customFormatArgStarts, cur->key.integer, cur->value.integer, &ec);
         }
     }
 }
 Formattable*
 MessageFormat::parse(int32_t msgStart,
                      const UnicodeString& source,
                      ParsePosition& pos,
                      int32_t& count,
                      UErrorCode& ec) const {
     count = 0;
     if (U_FAILURE(ec)) {
         pos.setErrorIndex(pos.getIndex());
         return NULL;
     }
     // parse() does not work with named arguments.
     if (msgPattern.hasNamedArguments()) {
         ec = U_ARGUMENT_TYPE_MISMATCH;
         pos.setErrorIndex(pos.getIndex());
         return NULL;
     }
     LocalArray<Formattable> resultArray(new Formattable[argTypeCount ? argTypeCount : 1]);
     const UnicodeString& msgString=msgPattern.getPatternString();
     int32_t prevIndex=msgPattern.getPart(msgStart).getLimit();
     int32_t sourceOffset = pos.getIndex();
     ParsePosition tempStatus(0);
     for(int32_t i=msgStart+1; ; ++i) {
         UBool haveArgResult = FALSE;
         const MessagePattern::Part* part=&msgPattern.getPart(i);
         const UMessagePatternPartType type=part->getType();
         int32_t index=part->getIndex();
         // Make sure the literal string matches.
         int32_t len = index - prevIndex;
         if (len == 0 || (0 == msgString.compare(prevIndex, len, source, sourceOffset, len))) {
             sourceOffset += len;
             prevIndex += len;
         } else {
             pos.setErrorIndex(sourceOffset);
             return NULL; // leave index as is to signal error
         }
         if(type==UMSGPAT_PART_TYPE_MSG_LIMIT) {
             // Things went well! Done.
             pos.setIndex(sourceOffset);
             return resultArray.orphan();
         }
         if(type==UMSGPAT_PART_TYPE_SKIP_SYNTAX || type==UMSGPAT_PART_TYPE_INSERT_CHAR) {
             prevIndex=part->getLimit();
             continue;
         }
         // We do not support parsing Plural formats. (No REPLACE_NUMBER here.)
         // Unexpected Part "part" in parsed message.
         U_ASSERT(type==UMSGPAT_PART_TYPE_ARG_START);
         int32_t argLimit=msgPattern.getLimitPartIndex(i);
         UMessagePatternArgType argType=part->getArgType();
         part=&msgPattern.getPart(++i);
         int32_t argNumber = part->getValue();  // ARG_NUMBER
         UnicodeString key;
         ++i;
         const Format* formatter = NULL;
         Formattable& argResult = resultArray[argNumber];
         if(cachedFormatters!=NULL && (formatter = getCachedFormatter(i - 2))!=NULL) {
             // Just parse using the formatter.
             tempStatus.setIndex(sourceOffset);
             formatter->parseObject(source, argResult, tempStatus);
             if (tempStatus.getIndex() == sourceOffset) {
                 pos.setErrorIndex(sourceOffset);
                 return NULL; // leave index as is to signal error
             }
             sourceOffset = tempStatus.getIndex();
             haveArgResult = TRUE;
         } else if(
             argType==UMSGPAT_ARG_TYPE_NONE || (cachedFormatters && uhash_iget(cachedFormatters, i -2))) {
             // We arrive here if getCachedFormatter returned NULL, but there was actually an element in the hash table.
             // This can only happen if the hash table contained a DummyFormat, so the if statement above is a check
             // for the hash table containind DummyFormat.
             // Match as a string.
             // if at end, use longest possible match
             // otherwise uses first match to intervening string
             // does NOT recursively try all possibilities
             UnicodeString stringAfterArgument = getLiteralStringUntilNextArgument(argLimit);
             int32_t next;
             if (!stringAfterArgument.isEmpty()) {
                 next = source.indexOf(stringAfterArgument, sourceOffset);
             } else {
                 next = source.length();
             }
             if (next < 0) {
                 pos.setErrorIndex(sourceOffset);
                 return NULL; // leave index as is to signal error
             } else {
                 UnicodeString strValue(source.tempSubString(sourceOffset, next - sourceOffset));
                 UnicodeString compValue;
                 compValue.append(LEFT_CURLY_BRACE);
                 itos(argNumber, compValue);
                 compValue.append(RIGHT_CURLY_BRACE);
                 if (0 != strValue.compare(compValue)) {
                     argResult.setString(strValue);
                     haveArgResult = TRUE;
                 }
                 sourceOffset = next;
             }
         } else if(argType==UMSGPAT_ARG_TYPE_CHOICE) {
             tempStatus.setIndex(sourceOffset);
             double choiceResult = ChoiceFormat::parseArgument(msgPattern, i, source, tempStatus);
             if (tempStatus.getIndex() == sourceOffset) {
                 pos.setErrorIndex(sourceOffset);
                 return NULL; // leave index as is to signal error
             }
             argResult.setDouble(choiceResult);
             haveArgResult = TRUE;
             sourceOffset = tempStatus.getIndex();
         } else if(UMSGPAT_ARG_TYPE_HAS_PLURAL_STYLE(argType) || argType==UMSGPAT_ARG_TYPE_SELECT) {
             // Parsing not supported.
             ec = U_UNSUPPORTED_ERROR;
             return NULL;
         } else {
             // This should never happen.
             ec = U_INTERNAL_PROGRAM_ERROR;
             return NULL;
         }
         if (haveArgResult && count <= argNumber) {
             count = argNumber + 1;
         }
         prevIndex=msgPattern.getPart(argLimit).getLimit();
         i=argLimit;
     }
 }
 // -------------------------------------
 // Parses the source pattern and returns the Formattable objects array,
 // the array count and the ending parse position.  The caller of this method
 // owns the array.
 Formattable*
 MessageFormat::parse(const UnicodeString& source,
                      ParsePosition& pos,
                      int32_t& count) const {
     UErrorCode ec = U_ZERO_ERROR;
     return parse(0, source, pos, count, ec);
 }
 // -------------------------------------
 // Parses the source string and returns the array of
 // Formattable objects and the array count.  The caller
 // owns the returned array.
 Formattable*
 MessageFormat::parse(const UnicodeString& source,
                      int32_t& cnt,
                      UErrorCode& success) const
 {
     if (msgPattern.hasNamedArguments()) {
         success = U_ARGUMENT_TYPE_MISMATCH;
         return NULL;
     }
     ParsePosition status(0);
     // Calls the actual implementation method and starts
     // from zero offset of the source text.
     Formattable* result = parse(source, status, cnt);
     if (status.getIndex() == 0) {
         success = U_MESSAGE_PARSE_ERROR;
         delete[] result;
         return NULL;
     }
     return result;
 }
 // -------------------------------------
 // Parses the source text and copy into the result buffer.
 void
 MessageFormat::parseObject( const UnicodeString& source,
                             Formattable& result,
                             ParsePosition& status) const
 {
     int32_t cnt = 0;
     Formattable* tmpResult = parse(source, status, cnt);
     if (tmpResult != NULL)
         result.adoptArray(tmpResult, cnt);
 }
 UnicodeString
 MessageFormat::autoQuoteApostrophe(const UnicodeString& pattern, UErrorCode& status) {
     UnicodeString result;
     if (U_SUCCESS(status)) {
         int32_t plen = pattern.length();
         const UChar* pat = pattern.getBuffer();
         int32_t blen = plen * 2 + 1; // space for null termination, convenience
         UChar* buf = result.getBuffer(blen);
         if (buf == NULL) {
             status = U_MEMORY_ALLOCATION_ERROR;
         } else {
             int32_t len = umsg_autoQuoteApostrophe(pat, plen, buf, blen, &status);
             result.releaseBuffer(U_SUCCESS(status) ? len : 0);
         }
     }
     if (U_FAILURE(status)) {
         result.setToBogus();
     }
     return result;
 }
 // -------------------------------------
 static Format* makeRBNF(URBNFRuleSetTag tag, const Locale& locale, const UnicodeString& defaultRuleSet, UErrorCode& ec) {
     RuleBasedNumberFormat* fmt = new RuleBasedNumberFormat(tag, locale, ec);
     if (fmt == NULL) {
         ec = U_MEMORY_ALLOCATION_ERROR;
     } else if (U_SUCCESS(ec) && defaultRuleSet.length() > 0) {
         UErrorCode localStatus = U_ZERO_ERROR; // ignore unrecognized default rule set
         fmt->setDefaultRuleSet(defaultRuleSet, localStatus);
     }
     return fmt;
 }
 void MessageFormat::cacheExplicitFormats(UErrorCode& status) {
     if (U_FAILURE(status)) {
         return;
     }
     if (cachedFormatters != NULL) {
         uhash_removeAll(cachedFormatters);
     }
     if (customFormatArgStarts != NULL) {
         uhash_removeAll(customFormatArgStarts);
     }
     // The last two "parts" can at most be ARG_LIMIT and MSG_LIMIT
     // which we need not examine.
     int32_t limit = msgPattern.countParts() - 2;
     argTypeCount = 0;
     // We also need not look at the first two "parts"
     // (at most MSG_START and ARG_START) in this loop.
     // We determine the argTypeCount first so that we can allocateArgTypes
     // so that the next loop can set argTypes[argNumber].
     // (This is for the C API which needs the argTypes to read its va_arg list.)
     for (int32_t i = 2; i < limit && U_SUCCESS(status); ++i) {
         const MessagePattern::Part& part = msgPattern.getPart(i);
         if (part.getType() == UMSGPAT_PART_TYPE_ARG_NUMBER) {
             const int argNumber = part.getValue();
             if (argNumber >= argTypeCount) {
                 argTypeCount = argNumber + 1;
             }
         }
     }
     if (!allocateArgTypes(argTypeCount, status)) {
         return;
     }
     // Set all argTypes to kObject, as a "none" value, for lack of any better value.
     // We never use kObject for real arguments.
     // We use it as "no argument yet" for the check for hasArgTypeConflicts.
     for (int32_t i = 0; i < argTypeCount; ++i) {
         argTypes[i] = Formattable::kObject;
     }
     hasArgTypeConflicts = FALSE;
     // This loop starts at part index 1 because we do need to examine
     // ARG_START parts. (But we can ignore the MSG_START.)
     for (int32_t i = 1; i < limit && U_SUCCESS(status); ++i) {
         const MessagePattern::Part* part = &msgPattern.getPart(i);
         if (part->getType() != UMSGPAT_PART_TYPE_ARG_START) {
             continue;
         }
         UMessagePatternArgType argType = part->getArgType();
         int32_t argNumber = -1;
         part = &msgPattern.getPart(i + 1);
         if (part->getType() == UMSGPAT_PART_TYPE_ARG_NUMBER) {
             argNumber = part->getValue();
         }
         Formattable::Type formattableType;
         switch (argType) {
         case UMSGPAT_ARG_TYPE_NONE:
             formattableType = Formattable::kString;
             break;
         case UMSGPAT_ARG_TYPE_SIMPLE: {
             int32_t index = i;
             i += 2;
             UnicodeString explicitType = msgPattern.getSubstring(msgPattern.getPart(i++));
             UnicodeString style;
             if ((part = &msgPattern.getPart(i))->getType() == UMSGPAT_PART_TYPE_ARG_STYLE) {
                 style = msgPattern.getSubstring(*part);
                 ++i;
             }
             UParseError parseError;
             Format* formatter = createAppropriateFormat(explicitType, style, formattableType, parseError, status);
             setArgStartFormat(index, formatter, status);
             break;
         }
         case UMSGPAT_ARG_TYPE_CHOICE:
         case UMSGPAT_ARG_TYPE_PLURAL:
         case UMSGPAT_ARG_TYPE_SELECTORDINAL:
             formattableType = Formattable::kDouble;
             break;
         case UMSGPAT_ARG_TYPE_SELECT:
             formattableType = Formattable::kString;
             break;
         default:
             status = U_INTERNAL_PROGRAM_ERROR;  // Should be unreachable.
             formattableType = Formattable::kString;
             break;
         }
         if (argNumber != -1) {
             if (argTypes[argNumber] != Formattable::kObject && argTypes[argNumber] != formattableType) {
                 hasArgTypeConflicts = TRUE;
             }
             argTypes[argNumber] = formattableType;
         }
     }
 }
 Format* MessageFormat::createAppropriateFormat(UnicodeString& type, UnicodeString& style,
                                                Formattable::Type& formattableType, UParseError& parseError,
                                                UErrorCode& ec) {
     if (U_FAILURE(ec)) {
         return NULL;
     }
     Format* fmt = NULL;
     int32_t typeID, styleID;
     DateFormat::EStyle date_style;
     switch (typeID = findKeyword(type, TYPE_IDS)) {
     case 0: // number
         formattableType = Formattable::kDouble;
         switch (findKeyword(style, NUMBER_STYLE_IDS)) {
         case 0: // default
             fmt = NumberFormat::createInstance(fLocale, ec);
             break;
         case 1: // currency
             fmt = NumberFormat::createCurrencyInstance(fLocale, ec);
             break;
         case 2: // percent
             fmt = NumberFormat::createPercentInstance(fLocale, ec);
             break;
         case 3: // integer
             formattableType = Formattable::kLong;
             fmt = createIntegerFormat(fLocale, ec);
             break;
         default: // pattern
             fmt = NumberFormat::createInstance(fLocale, ec);
             if (fmt) {
                 DecimalFormat* decfmt = dynamic_cast<DecimalFormat*>(fmt);
                 if (decfmt != NULL) {
                     decfmt->applyPattern(style,parseError,ec);
                 }
             }
             break;
         }
         break;
     case 1: // date
     case 2: // time
         formattableType = Formattable::kDate;
         styleID = findKeyword(style, DATE_STYLE_IDS);
         date_style = (styleID >= 0) ? DATE_STYLES[styleID] : DateFormat::kDefault;
         if (typeID == 1) {
             fmt = DateFormat::createDateInstance(date_style, fLocale);
         } else {
             fmt = DateFormat::createTimeInstance(date_style, fLocale);
         }
         if (styleID < 0 && fmt != NULL) {
             SimpleDateFormat* sdtfmt = dynamic_cast<SimpleDateFormat*>(fmt);
             if (sdtfmt != NULL) {
                 sdtfmt->applyPattern(style);
             }
         }
         break;
     case 3: // spellout
         formattableType = Formattable::kDouble;
         fmt = makeRBNF(URBNF_SPELLOUT, fLocale, style, ec);
         break;
     case 4: // ordinal
         formattableType = Formattable::kDouble;
         fmt = makeRBNF(URBNF_ORDINAL, fLocale, style, ec);
         break;
     case 5: // duration
         formattableType = Formattable::kDouble;
         fmt = makeRBNF(URBNF_DURATION, fLocale, style, ec);
         break;
     default:
         formattableType = Formattable::kString;
         ec = U_ILLEGAL_ARGUMENT_ERROR;
         break;
     }
     return fmt;
 }
 //-------------------------------------
 // Finds the string, s, in the string array, list.
 int32_t MessageFormat::findKeyword(const UnicodeString& s,
                                    const UChar * const *list)
 {
     if (s.isEmpty()) {
         return 0; // default
     }
     int32_t length = s.length();
     const UChar *ps = PatternProps::trimWhiteSpace(s.getBuffer(), length);
     UnicodeString buffer(FALSE, ps, length);
     // Trims the space characters and turns all characters
     // in s to lower case.
     buffer.toLower("");
     for (int32_t i = 0; list[i]; ++i) {
         if (!buffer.compare(list[i], u_strlen(list[i]))) {
             return i;
         }
     }
     return -1;
 }
 /**
  * Convenience method that ought to be in NumberFormat
  */
 NumberFormat*
 MessageFormat::createIntegerFormat(const Locale& locale, UErrorCode& status) const {
     NumberFormat *temp = NumberFormat::createInstance(locale, status);
     DecimalFormat *temp2;
     if (temp != NULL && (temp2 = dynamic_cast<DecimalFormat*>(temp)) != NULL) {
         temp2->setMaximumFractionDigits(0);
         temp2->setDecimalSeparatorAlwaysShown(FALSE);
         temp2->setParseIntegerOnly(TRUE);
     }
     return temp;
 }
 /**
  * Return the default number format.  Used to format a numeric
  * argument when subformats[i].format is NULL.  Returns NULL
  * on failure.
  *
  * Semantically const but may modify *this.
  */
 const NumberFormat* MessageFormat::getDefaultNumberFormat(UErrorCode& ec) const {
     if (defaultNumberFormat == NULL) {
         MessageFormat* t = (MessageFormat*) this;
         t->defaultNumberFormat = NumberFormat::createInstance(fLocale, ec);
         if (U_FAILURE(ec)) {
             delete t->defaultNumberFormat;
             t->defaultNumberFormat = NULL;
         } else if (t->defaultNumberFormat == NULL) {
             ec = U_MEMORY_ALLOCATION_ERROR;
         }
     }
     return defaultNumberFormat;
 }
 /**
  * Return the default date format.  Used to format a date
  * argument when subformats[i].format is NULL.  Returns NULL
  * on failure.
  *
  * Semantically const but may modify *this.
  */
 const DateFormat* MessageFormat::getDefaultDateFormat(UErrorCode& ec) const {
     if (defaultDateFormat == NULL) {
         MessageFormat* t = (MessageFormat*) this;
         t->defaultDateFormat = DateFormat::createDateTimeInstance(DateFormat::kShort, DateFormat::kShort, fLocale);
         if (t->defaultDateFormat == NULL) {
             ec = U_MEMORY_ALLOCATION_ERROR;
         }
     }
     return defaultDateFormat;
 }
 UBool
 MessageFormat::usesNamedArguments() const {
     return msgPattern.hasNamedArguments();
 }
 int32_t
 MessageFormat::getArgTypeCount() const {
     return argTypeCount;
 }
 UBool MessageFormat::equalFormats(const void* left, const void* right) {
     return *(const Format*)left==*(const Format*)right;
 }
 UBool MessageFormat::DummyFormat::operator==(const Format&) const {
     return TRUE;
 }
 Format* MessageFormat::DummyFormat::clone() const {
     return new DummyFormat();
 }
 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
                           UnicodeString& appendTo,
                           UErrorCode& status) const {
     if (U_SUCCESS(status)) {
         status = U_UNSUPPORTED_ERROR;
     }
     return appendTo;
 }
 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
                           UnicodeString& appendTo,
                           FieldPosition&,
                           UErrorCode& status) const {
     if (U_SUCCESS(status)) {
         status = U_UNSUPPORTED_ERROR;
     }
     return appendTo;
 }
 UnicodeString& MessageFormat::DummyFormat::format(const Formattable&,
                           UnicodeString& appendTo,
                           FieldPositionIterator*,
                           UErrorCode& status) const {
     if (U_SUCCESS(status)) {
         status = U_UNSUPPORTED_ERROR;
     }
     return appendTo;
 }
 void MessageFormat::DummyFormat::parseObject(const UnicodeString&,
                                                      Formattable&,
                                                      ParsePosition& ) const {
 }
 FormatNameEnumeration::FormatNameEnumeration(UVector *fNameList, UErrorCode& /*status*/) {
     pos=0;
     fFormatNames = fNameList;
 }
 const UnicodeString*
 FormatNameEnumeration::snext(UErrorCode& status) {
     if (U_SUCCESS(status) && pos < fFormatNames->size()) {
         return (const UnicodeString*)fFormatNames->elementAt(pos++);
     }
     return NULL;
 }
 void
 FormatNameEnumeration::reset(UErrorCode& /*status*/) {
     pos=0;
 }
 int32_t
 FormatNameEnumeration::count(UErrorCode& /*status*/) const {
     return (fFormatNames==NULL) ? 0 : fFormatNames->size();
 }
 FormatNameEnumeration::~FormatNameEnumeration() {
     delete fFormatNames;
 }
 MessageFormat::PluralSelectorProvider::PluralSelectorProvider(const MessageFormat &mf, UPluralType t)
         : msgFormat(mf), rules(NULL), type(t) {
 }
 MessageFormat::PluralSelectorProvider::~PluralSelectorProvider() {
     delete rules;
 }
 UnicodeString MessageFormat::PluralSelectorProvider::select(void *ctx, double number,
                                                             UErrorCode& ec) const {
     if (U_FAILURE(ec)) {
         return UnicodeString(FALSE, OTHER_STRING, 5);
     }
     MessageFormat::PluralSelectorProvider* t = const_cast<MessageFormat::PluralSelectorProvider*>(this);
     if(rules == NULL) {
         t->rules = PluralRules::forLocale(msgFormat.fLocale, type, ec);
         if (U_FAILURE(ec)) {
             return UnicodeString(FALSE, OTHER_STRING, 5);
         }
     }
     // Select a sub-message according to how the number is formatted,
     // which is specified in the selected sub-message.
     // We avoid this circle by looking at how
     // the number is formatted in the "other" sub-message
     // which must always be present and usually contains the number.
     // Message authors should be consistent across sub-messages.
     PluralSelectorContext &context = *static_cast<PluralSelectorContext *>(ctx);
     int32_t otherIndex = msgFormat.findOtherSubMessage(context.startIndex);
     context.numberArgIndex = msgFormat.findFirstPluralNumberArg(otherIndex, context.argName);
     if(context.numberArgIndex > 0 && msgFormat.cachedFormatters != NULL) {
         context.formatter =
             (const Format*)uhash_iget(msgFormat.cachedFormatters, context.numberArgIndex);
     }
     if(context.formatter == NULL) {
         context.formatter = msgFormat.getDefaultNumberFormat(ec);
         context.forReplaceNumber = TRUE;
     }
     U_ASSERT(context.number.getDouble(ec) == number);  // argument number minus the offset
     context.formatter->format(context.number, context.numberString, ec);
     const DecimalFormat *decFmt = dynamic_cast<const DecimalFormat *>(context.formatter);
     if(decFmt != NULL) {
         FixedDecimal dec = decFmt->getFixedDecimal(context.number, ec);
         return rules->select(dec);
     } else {
         return rules->select(number);
     }
 }
 void MessageFormat::PluralSelectorProvider::reset() {
     delete rules;
     rules = NULL;
 }
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_FORMATTING */
 //eof

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

intl/icu/source/i18n/msgfmt.cpp