523 lines
16 KiB
C++
523 lines
16 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 2013-2016, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: listformatter.cpp
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2012aug27
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* created by: Umesh P. Nair
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*/
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#include "cmemory.h"
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#include "unicode/fpositer.h" // FieldPositionIterator
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#include "unicode/listformatter.h"
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#include "unicode/simpleformatter.h"
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#include "unicode/ulistformatter.h"
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#include "fphdlimp.h"
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#include "mutex.h"
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#include "hash.h"
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#include "cstring.h"
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#include "uarrsort.h"
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#include "ulocimp.h"
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#include "charstr.h"
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#include "ucln_in.h"
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#include "uresimp.h"
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#include "resource.h"
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U_NAMESPACE_BEGIN
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struct ListFormatInternal : public UMemory {
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SimpleFormatter twoPattern;
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SimpleFormatter startPattern;
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SimpleFormatter middlePattern;
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SimpleFormatter endPattern;
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ListFormatInternal(
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const UnicodeString& two,
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const UnicodeString& start,
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const UnicodeString& middle,
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const UnicodeString& end,
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UErrorCode &errorCode) :
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twoPattern(two, 2, 2, errorCode),
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startPattern(start, 2, 2, errorCode),
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middlePattern(middle, 2, 2, errorCode),
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endPattern(end, 2, 2, errorCode) {}
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ListFormatInternal(const ListFormatData &data, UErrorCode &errorCode) :
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twoPattern(data.twoPattern, errorCode),
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startPattern(data.startPattern, errorCode),
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middlePattern(data.middlePattern, errorCode),
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endPattern(data.endPattern, errorCode) { }
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ListFormatInternal(const ListFormatInternal &other) :
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twoPattern(other.twoPattern),
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startPattern(other.startPattern),
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middlePattern(other.middlePattern),
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endPattern(other.endPattern) { }
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};
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static Hashtable* listPatternHash = nullptr;
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static UMutex listFormatterMutex = U_MUTEX_INITIALIZER;
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static const char STANDARD_STYLE[] = "standard";
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U_CDECL_BEGIN
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static UBool U_CALLCONV uprv_listformatter_cleanup() {
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delete listPatternHash;
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listPatternHash = nullptr;
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return TRUE;
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}
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static void U_CALLCONV
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uprv_deleteListFormatInternal(void *obj) {
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delete static_cast<ListFormatInternal *>(obj);
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}
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U_CDECL_END
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ListFormatter::ListFormatter(const ListFormatter& other) :
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owned(other.owned), data(other.data) {
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if (other.owned != nullptr) {
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owned = new ListFormatInternal(*other.owned);
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data = owned;
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}
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}
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ListFormatter& ListFormatter::operator=(const ListFormatter& other) {
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if (this == &other) {
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return *this;
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}
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delete owned;
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if (other.owned) {
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owned = new ListFormatInternal(*other.owned);
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data = owned;
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} else {
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owned = nullptr;
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data = other.data;
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}
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return *this;
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}
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void ListFormatter::initializeHash(UErrorCode& errorCode) {
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if (U_FAILURE(errorCode)) {
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return;
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}
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listPatternHash = new Hashtable();
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if (listPatternHash == nullptr) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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listPatternHash->setValueDeleter(uprv_deleteListFormatInternal);
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ucln_i18n_registerCleanup(UCLN_I18N_LIST_FORMATTER, uprv_listformatter_cleanup);
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}
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const ListFormatInternal* ListFormatter::getListFormatInternal(
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const Locale& locale, const char *style, UErrorCode& errorCode) {
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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CharString keyBuffer(locale.getName(), errorCode);
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keyBuffer.append(':', errorCode).append(style, errorCode);
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UnicodeString key(keyBuffer.data(), -1, US_INV);
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ListFormatInternal* result = nullptr;
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{
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Mutex m(&listFormatterMutex);
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if (listPatternHash == nullptr) {
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initializeHash(errorCode);
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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}
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result = static_cast<ListFormatInternal*>(listPatternHash->get(key));
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}
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if (result != nullptr) {
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return result;
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}
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result = loadListFormatInternal(locale, style, errorCode);
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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{
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Mutex m(&listFormatterMutex);
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ListFormatInternal* temp = static_cast<ListFormatInternal*>(listPatternHash->get(key));
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if (temp != nullptr) {
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delete result;
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result = temp;
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} else {
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listPatternHash->put(key, result, errorCode);
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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}
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}
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return result;
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}
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static const UChar solidus = 0x2F;
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static const UChar aliasPrefix[] = { 0x6C,0x69,0x73,0x74,0x50,0x61,0x74,0x74,0x65,0x72,0x6E,0x2F }; // "listPattern/"
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enum {
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kAliasPrefixLen = UPRV_LENGTHOF(aliasPrefix),
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kStyleLenMax = 24 // longest currently is 14
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};
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struct ListFormatter::ListPatternsSink : public ResourceSink {
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UnicodeString two, start, middle, end;
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#if ((U_PLATFORM == U_PF_AIX) || (U_PLATFORM == U_PF_OS390)) && (U_CPLUSPLUS_VERSION < 11)
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char aliasedStyle[kStyleLenMax+1];
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ListPatternsSink() {
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uprv_memset(aliasedStyle, 0, kStyleLenMax+1);
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}
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#else
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char aliasedStyle[kStyleLenMax+1] = {0};
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ListPatternsSink() {}
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#endif
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virtual ~ListPatternsSink();
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void setAliasedStyle(UnicodeString alias) {
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int32_t startIndex = alias.indexOf(aliasPrefix, kAliasPrefixLen, 0);
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if (startIndex < 0) {
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return;
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}
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startIndex += kAliasPrefixLen;
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int32_t endIndex = alias.indexOf(solidus, startIndex);
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if (endIndex < 0) {
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endIndex = alias.length();
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}
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alias.extract(startIndex, endIndex-startIndex, aliasedStyle, kStyleLenMax+1, US_INV);
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aliasedStyle[kStyleLenMax] = 0;
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}
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void handleValueForPattern(ResourceValue &value, UnicodeString &pattern, UErrorCode &errorCode) {
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if (pattern.isEmpty()) {
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if (value.getType() == URES_ALIAS) {
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if (aliasedStyle[0] == 0) {
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setAliasedStyle(value.getAliasUnicodeString(errorCode));
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}
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} else {
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pattern = value.getUnicodeString(errorCode);
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}
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}
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}
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virtual void put(const char *key, ResourceValue &value, UBool /*noFallback*/,
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UErrorCode &errorCode) {
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aliasedStyle[0] = 0;
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if (value.getType() == URES_ALIAS) {
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setAliasedStyle(value.getAliasUnicodeString(errorCode));
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return;
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}
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ResourceTable listPatterns = value.getTable(errorCode);
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for (int i = 0; U_SUCCESS(errorCode) && listPatterns.getKeyAndValue(i, key, value); ++i) {
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if (uprv_strcmp(key, "2") == 0) {
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handleValueForPattern(value, two, errorCode);
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} else if (uprv_strcmp(key, "end") == 0) {
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handleValueForPattern(value, end, errorCode);
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} else if (uprv_strcmp(key, "middle") == 0) {
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handleValueForPattern(value, middle, errorCode);
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} else if (uprv_strcmp(key, "start") == 0) {
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handleValueForPattern(value, start, errorCode);
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}
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}
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}
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};
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// Virtual destructors must be defined out of line.
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ListFormatter::ListPatternsSink::~ListPatternsSink() {}
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ListFormatInternal* ListFormatter::loadListFormatInternal(
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const Locale& locale, const char * style, UErrorCode& errorCode) {
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UResourceBundle* rb = ures_open(nullptr, locale.getName(), &errorCode);
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rb = ures_getByKeyWithFallback(rb, "listPattern", rb, &errorCode);
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if (U_FAILURE(errorCode)) {
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ures_close(rb);
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return nullptr;
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}
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ListFormatter::ListPatternsSink sink;
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char currentStyle[kStyleLenMax+1];
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uprv_strncpy(currentStyle, style, kStyleLenMax);
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currentStyle[kStyleLenMax] = 0;
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for (;;) {
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ures_getAllItemsWithFallback(rb, currentStyle, sink, errorCode);
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if (U_FAILURE(errorCode) || sink.aliasedStyle[0] == 0 || uprv_strcmp(currentStyle, sink.aliasedStyle) == 0) {
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break;
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}
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uprv_strcpy(currentStyle, sink.aliasedStyle);
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}
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ures_close(rb);
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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if (sink.two.isEmpty() || sink.start.isEmpty() || sink.middle.isEmpty() || sink.end.isEmpty()) {
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errorCode = U_MISSING_RESOURCE_ERROR;
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return nullptr;
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}
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ListFormatInternal* result = new ListFormatInternal(sink.two, sink.start, sink.middle, sink.end, errorCode);
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if (result == nullptr) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return nullptr;
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}
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if (U_FAILURE(errorCode)) {
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delete result;
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return nullptr;
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}
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return result;
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}
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ListFormatter* ListFormatter::createInstance(UErrorCode& errorCode) {
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Locale locale; // The default locale.
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return createInstance(locale, errorCode);
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}
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ListFormatter* ListFormatter::createInstance(const Locale& locale, UErrorCode& errorCode) {
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return createInstance(locale, STANDARD_STYLE, errorCode);
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}
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ListFormatter* ListFormatter::createInstance(const Locale& locale, const char *style, UErrorCode& errorCode) {
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Locale tempLocale = locale;
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const ListFormatInternal* listFormatInternal = getListFormatInternal(tempLocale, style, errorCode);
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if (U_FAILURE(errorCode)) {
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return nullptr;
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}
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ListFormatter* p = new ListFormatter(listFormatInternal);
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if (p == nullptr) {
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errorCode = U_MEMORY_ALLOCATION_ERROR;
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return nullptr;
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}
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return p;
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}
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ListFormatter::ListFormatter(const ListFormatData& listFormatData, UErrorCode &errorCode) {
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owned = new ListFormatInternal(listFormatData, errorCode);
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data = owned;
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}
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ListFormatter::ListFormatter(const ListFormatInternal* listFormatterInternal) : owned(nullptr), data(listFormatterInternal) {
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}
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ListFormatter::~ListFormatter() {
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delete owned;
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}
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/**
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* Joins first and second using the pattern pat.
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* On entry offset is an offset into first or -1 if offset unspecified.
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* On exit offset is offset of second in result if recordOffset was set
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* Otherwise if it was >=0 it is set to point into result where it used
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* to point into first. On exit, result is the join of first and second
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* according to pat. Any previous value of result gets replaced.
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*/
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static void joinStringsAndReplace(
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const SimpleFormatter& pat,
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const UnicodeString& first,
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const UnicodeString& second,
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UnicodeString &result,
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UBool recordOffset,
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int32_t &offset,
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int32_t *offsetFirst,
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int32_t *offsetSecond,
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UErrorCode& errorCode) {
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if (U_FAILURE(errorCode)) {
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return;
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}
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const UnicodeString *params[2] = {&first, &second};
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int32_t offsets[2];
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pat.formatAndReplace(
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params,
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UPRV_LENGTHOF(params),
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result,
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offsets,
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UPRV_LENGTHOF(offsets),
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errorCode);
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if (U_FAILURE(errorCode)) {
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return;
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}
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if (offsets[0] == -1 || offsets[1] == -1) {
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errorCode = U_INVALID_FORMAT_ERROR;
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return;
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}
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if (recordOffset) {
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offset = offsets[1];
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} else if (offset >= 0) {
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offset += offsets[0];
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}
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if (offsetFirst != nullptr) *offsetFirst = offsets[0];
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if (offsetSecond != nullptr) *offsetSecond = offsets[1];
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}
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UnicodeString& ListFormatter::format(
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const UnicodeString items[],
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int32_t nItems,
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UnicodeString& appendTo,
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UErrorCode& errorCode) const {
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int32_t offset;
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return format(items, nItems, appendTo, -1, offset, errorCode);
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}
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UnicodeString& ListFormatter::format(
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const UnicodeString items[],
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int32_t nItems,
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UnicodeString & appendTo,
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FieldPositionIterator* posIter,
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UErrorCode& errorCode) const {
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int32_t offset;
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FieldPositionIteratorHandler handler(posIter, errorCode);
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return format_(items, nItems, appendTo, -1, offset, &handler, errorCode);
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};
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UnicodeString& ListFormatter::format(
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const UnicodeString items[],
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int32_t nItems,
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UnicodeString& appendTo,
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int32_t index,
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int32_t &offset,
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UErrorCode& errorCode) const {
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return format_(items, nItems, appendTo, index, offset, nullptr, errorCode);
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}
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UnicodeString& ListFormatter::format_(
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const UnicodeString items[],
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int32_t nItems,
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UnicodeString& appendTo,
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int32_t index,
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int32_t &offset,
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FieldPositionHandler* handler,
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UErrorCode& errorCode) const {
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offset = -1;
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if (U_FAILURE(errorCode)) {
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return appendTo;
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}
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if (data == nullptr) {
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errorCode = U_INVALID_STATE_ERROR;
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return appendTo;
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}
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if (nItems <= 0) {
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return appendTo;
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}
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if (nItems == 1) {
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if (index == 0) {
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offset = appendTo.length();
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}
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if (handler != nullptr) {
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handler->addAttribute(ULISTFMT_ELEMENT_FIELD,
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appendTo.length(),
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appendTo.length() + items[0].length());
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}
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appendTo.append(items[0]);
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return appendTo;
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}
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UnicodeString result(items[0]);
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if (index == 0) {
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offset = 0;
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}
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int32_t offsetFirst;
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int32_t offsetSecond;
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int32_t prefixLength = 0;
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// for n items, there are 2 * (n + 1) boundary including 0 and the upper
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// edge.
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MaybeStackArray<int32_t, 10> offsets((handler != nullptr) ? 2 * (nItems + 1): 0);
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joinStringsAndReplace(
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nItems == 2 ? data->twoPattern : data->startPattern,
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result,
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items[1],
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result,
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index == 1,
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offset,
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&offsetFirst,
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&offsetSecond,
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errorCode);
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if (handler != nullptr) {
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offsets[0] = 0;
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prefixLength += offsetFirst;
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offsets[1] = offsetSecond - prefixLength;
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}
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if (nItems > 2) {
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for (int32_t i = 2; i < nItems - 1; ++i) {
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joinStringsAndReplace(
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data->middlePattern,
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result,
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items[i],
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result,
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index == i,
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offset,
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&offsetFirst,
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&offsetSecond,
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errorCode);
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if (handler != nullptr) {
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prefixLength += offsetFirst;
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offsets[i] = offsetSecond - prefixLength;
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}
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}
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joinStringsAndReplace(
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data->endPattern,
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result,
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items[nItems - 1],
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result,
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index == nItems - 1,
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offset,
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&offsetFirst,
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&offsetSecond,
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errorCode);
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if (handler != nullptr) {
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prefixLength += offsetFirst;
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offsets[nItems - 1] = offsetSecond - prefixLength;
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}
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}
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if (handler != nullptr) {
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// If there are already some data in appendTo, we need to adjust the index
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// by shifting that lenght while insert into handler.
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int32_t shift = appendTo.length() + prefixLength;
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// Output the ULISTFMT_ELEMENT_FIELD in the order of the input elements
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for (int32_t i = 0; i < nItems; ++i) {
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offsets[i + nItems] = offsets[i] + items[i].length() + shift;
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offsets[i] += shift;
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handler->addAttribute(
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ULISTFMT_ELEMENT_FIELD, // id
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offsets[i], // index
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offsets[i + nItems]); // limit
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}
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// The locale pattern may reorder the items (such as in ur-IN locale),
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// so we cannot assume the array is in accendning order.
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// To handle the edging case, just insert the two ends into the array
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// and sort. Then we output ULISTFMT_LITERAL_FIELD if the indecies
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// between the even and odd position are not the same in the sorted array.
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offsets[2 * nItems] = shift - prefixLength;
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offsets[2 * nItems + 1] = result.length() + shift - prefixLength;
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uprv_sortArray(offsets.getAlias(), 2 * (nItems + 1), sizeof(int32_t),
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uprv_int32Comparator, nullptr,
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false, &errorCode);
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for (int32_t i = 0; i <= nItems; ++i) {
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if (offsets[i * 2] != offsets[i * 2 + 1]) {
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handler->addAttribute(
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ULISTFMT_LITERAL_FIELD, // id
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offsets[i * 2], // index
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offsets[i * 2 + 1]); // limit
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}
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}
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}
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if (U_SUCCESS(errorCode)) {
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if (offset >= 0) {
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offset += appendTo.length();
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}
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appendTo += result;
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}
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return appendTo;
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}
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U_NAMESPACE_END
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