[apple/icu.git] / icuSources / common / listformatter.cpp

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
*   Copyright (C) 2013-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  listformatter.cpp
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2012aug27
*   created by: Umesh P. Nair
*/

#include "unicode/listformatter.h"
#include "unicode/simpleformatter.h"
#include "mutex.h"
#include "hash.h"
#include "cstring.h"
#include "ulocimp.h"
#include "charstr.h"
#include "ucln_cmn.h"
#include "uresimp.h"
#include "resource.h"

U_NAMESPACE_BEGIN

struct ListFormatInternal : public UMemory {
    SimpleFormatter twoPattern;
    SimpleFormatter startPattern;
    SimpleFormatter middlePattern;
    SimpleFormatter endPattern;

ListFormatInternal(
        const UnicodeString& two,
        const UnicodeString& start,
        const UnicodeString& middle,
        const UnicodeString& end,
        UErrorCode &errorCode) :
        twoPattern(two, 2, 2, errorCode),
        startPattern(start, 2, 2, errorCode),
        middlePattern(middle, 2, 2, errorCode),
        endPattern(end, 2, 2, errorCode) {}

ListFormatInternal(const ListFormatData &data, UErrorCode &errorCode) :
        twoPattern(data.twoPattern, errorCode),
        startPattern(data.startPattern, errorCode),
        middlePattern(data.middlePattern, errorCode),
        endPattern(data.endPattern, errorCode) { }

ListFormatInternal(const ListFormatInternal &other) :
    twoPattern(other.twoPattern),
    startPattern(other.startPattern),
    middlePattern(other.middlePattern),
    endPattern(other.endPattern) { }
};


static Hashtable* listPatternHash = NULL;
static UMutex listFormatterMutex = U_MUTEX_INITIALIZER;
static const char STANDARD_STYLE[] = "standard";

U_CDECL_BEGIN
static UBool U_CALLCONV uprv_listformatter_cleanup() {
    delete listPatternHash;
    listPatternHash = NULL;
    return TRUE;
}

static void U_CALLCONV
uprv_deleteListFormatInternal(void *obj) {
    delete static_cast<ListFormatInternal *>(obj);
}

U_CDECL_END

ListFormatter::ListFormatter(const ListFormatter& other) :
        owned(other.owned), data(other.data) {
    if (other.owned != NULL) {
        owned = new ListFormatInternal(*other.owned);
        data = owned;
    }
}

ListFormatter& ListFormatter::operator=(const ListFormatter& other) {
    if (this == &other) {
        return *this;
    }
    delete owned;
    if (other.owned) {
        owned = new ListFormatInternal(*other.owned);
        data = owned;
    } else {
        owned = NULL;
        data = other.data;
    }
    return *this;
}

void ListFormatter::initializeHash(UErrorCode& errorCode) {
    if (U_FAILURE(errorCode)) {
        return;
    }

    listPatternHash = new Hashtable();
    if (listPatternHash == NULL) {
        errorCode = U_MEMORY_ALLOCATION_ERROR;
        return;
    }

    listPatternHash->setValueDeleter(uprv_deleteListFormatInternal);
    ucln_common_registerCleanup(UCLN_COMMON_LIST_FORMATTER, uprv_listformatter_cleanup);

}

const ListFormatInternal* ListFormatter::getListFormatInternal(
        const Locale& locale, const char *style, UErrorCode& errorCode) {
    if (U_FAILURE(errorCode)) {
        return NULL;
    }
    CharString keyBuffer(locale.getName(), errorCode);
    keyBuffer.append(':', errorCode).append(style, errorCode);
    UnicodeString key(keyBuffer.data(), -1, US_INV);
    ListFormatInternal* result = NULL;
    {
        Mutex m(&listFormatterMutex);
        if (listPatternHash == NULL) {
            initializeHash(errorCode);
            if (U_FAILURE(errorCode)) {
                return NULL;
            }
        }
        result = static_cast<ListFormatInternal*>(listPatternHash->get(key));
    }
    if (result != NULL) {
        return result;
    }
    result = loadListFormatInternal(locale, style, errorCode);
    if (U_FAILURE(errorCode)) {
        return NULL;
    }

    {
        Mutex m(&listFormatterMutex);
        ListFormatInternal* temp = static_cast<ListFormatInternal*>(listPatternHash->get(key));
        if (temp != NULL) {
            delete result;
            result = temp;
        } else {
            listPatternHash->put(key, result, errorCode);
            if (U_FAILURE(errorCode)) {
                return NULL;
            }
        }
    }
    return result;
}

static const UChar solidus = 0x2F;
static const UChar aliasPrefix[] = { 0x6C,0x69,0x73,0x74,0x50,0x61,0x74,0x74,0x65,0x72,0x6E,0x2F }; // "listPattern/"
enum {
    kAliasPrefixLen = UPRV_LENGTHOF(aliasPrefix),
    kStyleLenMax = 24 // longest currently is 14
};

struct ListFormatter::ListPatternsSink : public ResourceSink {
    UnicodeString two, start, middle, end;
#if ((U_PLATFORM == U_PF_AIX) || (U_PLATFORM == U_PF_OS390)) && (U_CPLUSPLUS_VERSION < 11)
    char aliasedStyle[kStyleLenMax+1];
    ListPatternsSink() {
      uprv_memset(aliasedStyle, 0, kStyleLenMax+1);
    }
#else
    char aliasedStyle[kStyleLenMax+1] = {0};

    ListPatternsSink() {}
#endif
    virtual ~ListPatternsSink();

    void setAliasedStyle(UnicodeString alias) {
        int32_t startIndex = alias.indexOf(aliasPrefix, kAliasPrefixLen, 0);
        if (startIndex < 0) {
            return;
        }
        startIndex += kAliasPrefixLen;
        int32_t endIndex = alias.indexOf(solidus, startIndex);
        if (endIndex < 0) {
            endIndex = alias.length();
        }
        alias.extract(startIndex, endIndex-startIndex, aliasedStyle, kStyleLenMax+1, US_INV);
        aliasedStyle[kStyleLenMax] = 0;
    }

    void handleValueForPattern(ResourceValue &value, UnicodeString &pattern, UErrorCode &errorCode) {
        if (pattern.isEmpty()) {
            if (value.getType() == URES_ALIAS) {
                if (aliasedStyle[0] == 0) {
                    setAliasedStyle(value.getAliasUnicodeString(errorCode));
                }
            } else {
                pattern = value.getUnicodeString(errorCode);
            }
        }
    }

    virtual void put(const char *key, ResourceValue &value, UBool /*noFallback*/,
            UErrorCode &errorCode) {
        aliasedStyle[0] = 0;
        if (value.getType() == URES_ALIAS) {
            setAliasedStyle(value.getAliasUnicodeString(errorCode));
            return;
        }
        ResourceTable listPatterns = value.getTable(errorCode);
        for (int i = 0; U_SUCCESS(errorCode) && listPatterns.getKeyAndValue(i, key, value); ++i) {
            if (uprv_strcmp(key, "2") == 0) {
                handleValueForPattern(value, two, errorCode);
            } else if (uprv_strcmp(key, "end") == 0) {
                handleValueForPattern(value, end, errorCode);
            } else if (uprv_strcmp(key, "middle") == 0) {
                handleValueForPattern(value, middle, errorCode);
            } else if (uprv_strcmp(key, "start") == 0) {
                handleValueForPattern(value, start, errorCode);
            }
        }
    }
};

// Virtual destructors must be defined out of line.
ListFormatter::ListPatternsSink::~ListPatternsSink() {}

ListFormatInternal* ListFormatter::loadListFormatInternal(
        const Locale& locale, const char * style, UErrorCode& errorCode) {
    UResourceBundle* rb = ures_open(NULL, locale.getName(), &errorCode);
    rb = ures_getByKeyWithFallback(rb, "listPattern", rb, &errorCode);
    if (U_FAILURE(errorCode)) {
        ures_close(rb);
        return NULL;
    }
    ListFormatter::ListPatternsSink sink;
    char currentStyle[kStyleLenMax+1];
    uprv_strncpy(currentStyle, style, kStyleLenMax);
    currentStyle[kStyleLenMax] = 0;

    for (;;) {
        ures_getAllItemsWithFallback(rb, currentStyle, sink, errorCode);
        if (U_FAILURE(errorCode) || sink.aliasedStyle[0] == 0 || uprv_strcmp(currentStyle, sink.aliasedStyle) == 0) {
            break;
        }
        uprv_strcpy(currentStyle, sink.aliasedStyle);
    }
    ures_close(rb);
    if (U_FAILURE(errorCode)) {
        return NULL;
    }
    if (sink.two.isEmpty() || sink.start.isEmpty() || sink.middle.isEmpty() || sink.end.isEmpty()) {
        errorCode = U_MISSING_RESOURCE_ERROR;
        return NULL;
    }
    ListFormatInternal* result = new ListFormatInternal(sink.two, sink.start, sink.middle, sink.end, errorCode);
    if (result == NULL) {
        errorCode = U_MEMORY_ALLOCATION_ERROR;
        return NULL;
    }
    if (U_FAILURE(errorCode)) {
        delete result;
        return NULL;
    }
    return result;
}

ListFormatter* ListFormatter::createInstance(UErrorCode& errorCode) {
    Locale locale;  // The default locale.
    return createInstance(locale, errorCode);
}

ListFormatter* ListFormatter::createInstance(const Locale& locale, UErrorCode& errorCode) {
    return createInstance(locale, STANDARD_STYLE, errorCode);
}

ListFormatter* ListFormatter::createInstance(const Locale& locale, const char *style, UErrorCode& errorCode) {
    Locale tempLocale = locale;
    const ListFormatInternal* listFormatInternal = getListFormatInternal(tempLocale, style, errorCode);
    if (U_FAILURE(errorCode)) {
        return NULL;
    }
    ListFormatter* p = new ListFormatter(listFormatInternal);
    if (p == NULL) {
        errorCode = U_MEMORY_ALLOCATION_ERROR;
        return NULL;
    }
    return p;
}

ListFormatter::ListFormatter(const ListFormatData& listFormatData, UErrorCode &errorCode) {
    owned = new ListFormatInternal(listFormatData, errorCode);
    data = owned;
}

ListFormatter::ListFormatter(const ListFormatInternal* listFormatterInternal) : owned(NULL), data(listFormatterInternal) {
}

ListFormatter::~ListFormatter() {
    delete owned;
}

/**
 * Joins first and second using the pattern pat.
 * On entry offset is an offset into first or -1 if offset unspecified.
 * On exit offset is offset of second in result if recordOffset was set
 * Otherwise if it was >=0 it is set to point into result where it used
 * to point into first. On exit, result is the join of first and second
 * according to pat. Any previous value of result gets replaced.
 */
static void joinStringsAndReplace(
        const SimpleFormatter& pat,
        const UnicodeString& first,
        const UnicodeString& second,
        UnicodeString &result,
        UBool recordOffset,
        int32_t &offset,
        UErrorCode& errorCode) {
    if (U_FAILURE(errorCode)) {
        return;
    }
    const UnicodeString *params[2] = {&first, &second};
    int32_t offsets[2];
    pat.formatAndReplace(
            params,
            UPRV_LENGTHOF(params),
            result,
            offsets,
            UPRV_LENGTHOF(offsets),
            errorCode);
    if (U_FAILURE(errorCode)) {
        return;
    }
    if (offsets[0] == -1 || offsets[1] == -1) {
        errorCode = U_INVALID_FORMAT_ERROR;
        return;
    }
    if (recordOffset) {
        offset = offsets[1];
    } else if (offset >= 0) {
        offset += offsets[0];
    }
}

UnicodeString& ListFormatter::format(
        const UnicodeString items[],
        int32_t nItems,
        UnicodeString& appendTo,
        UErrorCode& errorCode) const {
    int32_t offset;
    return format(items, nItems, appendTo, -1, offset, errorCode);
}

UnicodeString& ListFormatter::format(
        const UnicodeString items[],
        int32_t nItems,
        UnicodeString& appendTo,
        int32_t index,
        int32_t &offset,
        UErrorCode& errorCode) const {
    offset = -1;
    if (U_FAILURE(errorCode)) {
        return appendTo;
    }
    if (data == NULL) {
        errorCode = U_INVALID_STATE_ERROR;
        return appendTo;
    }

    if (nItems <= 0) {
        return appendTo;
    }
    if (nItems == 1) {
        if (index == 0) {
            offset = appendTo.length();
        }
        appendTo.append(items[0]);
        return appendTo;
    }
    UnicodeString result(items[0]);
    if (index == 0) {
        offset = 0;
    }
    joinStringsAndReplace(
            nItems == 2 ? data->twoPattern : data->startPattern,
            result,
            items[1],
            result,
            index == 1,
            offset,
            errorCode);
    if (nItems > 2) {
        for (int32_t i = 2; i < nItems - 1; ++i) {
             joinStringsAndReplace(
                     data->middlePattern,
                     result,
                     items[i],
                     result,
                     index == i,
                     offset,
                     errorCode);
        }
        joinStringsAndReplace(
                data->endPattern,
                result,
                items[nItems - 1],
                result,
                index == nItems - 1,
                offset,
                errorCode);
    }
    if (U_SUCCESS(errorCode)) {
        if (offset >= 0) {
            offset += appendTo.length();
        }
        appendTo += result;
    }
    return appendTo;
}

U_NAMESPACE_END
Commit	Line	Data
f3c0d7a5 A	1	// © 2016 and later: Unicode, Inc. and others.
f3c0d7a5 A	2	// License & terms of use: http://www.unicode.org/copyright.html
51004dcb A	3	/*
	4	*******************************************************************************
	5	*
2ca993e8	6	* Copyright (C) 2013-2016, International Business Machines
51004dcb A	7	* Corporation and others. All Rights Reserved.
	8	*
	9	*******************************************************************************
	10	* file name: listformatter.cpp
f3c0d7a5	11	* encoding: UTF-8
51004dcb A	12	* tab size: 8 (not used)
	13	* indentation:4
	14	*
	15	* created on: 2012aug27
	16	* created by: Umesh P. Nair
	17	*/
	18
	19	#include "unicode/listformatter.h"
2ca993e8	20	#include "unicode/simpleformatter.h"
51004dcb A	21	#include "mutex.h"
	22	#include "hash.h"
	23	#include "cstring.h"
	24	#include "ulocimp.h"
	25	#include "charstr.h"
	26	#include "ucln_cmn.h"
	27	#include "uresimp.h"
f3c0d7a5	28	#include "resource.h"
51004dcb A	29
	30	U_NAMESPACE_BEGIN
	31
57a6839d	32	struct ListFormatInternal : public UMemory {
2ca993e8 A	33	SimpleFormatter twoPattern;
	34	SimpleFormatter startPattern;
	35	SimpleFormatter middlePattern;
	36	SimpleFormatter endPattern;
57a6839d A	37
	38	ListFormatInternal(
	39	const UnicodeString& two,
	40	const UnicodeString& start,
	41	const UnicodeString& middle,
2ca993e8 A	42	const UnicodeString& end,
	43	UErrorCode &errorCode) :
	44	twoPattern(two, 2, 2, errorCode),
	45	startPattern(start, 2, 2, errorCode),
	46	middlePattern(middle, 2, 2, errorCode),
	47	endPattern(end, 2, 2, errorCode) {}
	48
	49	ListFormatInternal(const ListFormatData &data, UErrorCode &errorCode) :
	50	twoPattern(data.twoPattern, errorCode),
	51	startPattern(data.startPattern, errorCode),
	52	middlePattern(data.middlePattern, errorCode),
	53	endPattern(data.endPattern, errorCode) { }
57a6839d A	54
	55	ListFormatInternal(const ListFormatInternal &other) :
	56	twoPattern(other.twoPattern),
	57	startPattern(other.startPattern),
	58	middlePattern(other.middlePattern),
	59	endPattern(other.endPattern) { }
	60	};
	61
	62
	63
51004dcb A	64	static Hashtable* listPatternHash = NULL;
51004dcb A	65	static UMutex listFormatterMutex = U_MUTEX_INITIALIZER;
0f5d89e8	66	static const char STANDARD_STYLE[] = "standard";
51004dcb A	67
	68	U_CDECL_BEGIN
	69	static UBool U_CALLCONV uprv_listformatter_cleanup() {
	70	delete listPatternHash;
	71	listPatternHash = NULL;
	72	return TRUE;
	73	}
	74
	75	static void U_CALLCONV
57a6839d A	76	uprv_deleteListFormatInternal(void *obj) {
57a6839d A	77	delete static_cast<ListFormatInternal *>(obj);
51004dcb A	78	}
	79
	80	U_CDECL_END
	81
57a6839d A	82	ListFormatter::ListFormatter(const ListFormatter& other) :
	83	owned(other.owned), data(other.data) {
	84	if (other.owned != NULL) {
	85	owned = new ListFormatInternal(*other.owned);
	86	data = owned;
	87	}
	88	}
	89
	90	ListFormatter& ListFormatter::operator=(const ListFormatter& other) {
	91	if (this == &other) {
	92	return *this;
	93	}
	94	delete owned;
	95	if (other.owned) {
	96	owned = new ListFormatInternal(*other.owned);
	97	data = owned;
	98	} else {
	99	owned = NULL;
	100	data = other.data;
	101	}
	102	return *this;
	103	}
51004dcb A	104
	105	void ListFormatter::initializeHash(UErrorCode& errorCode) {
	106	if (U_FAILURE(errorCode)) {
	107	return;
	108	}
	109
	110	listPatternHash = new Hashtable();
	111	if (listPatternHash == NULL) {
	112	errorCode = U_MEMORY_ALLOCATION_ERROR;
	113	return;
	114	}
	115
57a6839d	116	listPatternHash->setValueDeleter(uprv_deleteListFormatInternal);
51004dcb A	117	ucln_common_registerCleanup(UCLN_COMMON_LIST_FORMATTER, uprv_listformatter_cleanup);
	118
	119	}
	120
57a6839d A	121	const ListFormatInternal* ListFormatter::getListFormatInternal(
57a6839d A	122	const Locale& locale, const char *style, UErrorCode& errorCode) {
51004dcb A	123	if (U_FAILURE(errorCode)) {
	124	return NULL;
	125	}
57a6839d A	126	CharString keyBuffer(locale.getName(), errorCode);
	127	keyBuffer.append(':', errorCode).append(style, errorCode);
	128	UnicodeString key(keyBuffer.data(), -1, US_INV);
	129	ListFormatInternal* result = NULL;
51004dcb A	130	{
	131	Mutex m(&listFormatterMutex);
	132	if (listPatternHash == NULL) {
	133	initializeHash(errorCode);
	134	if (U_FAILURE(errorCode)) {
	135	return NULL;
	136	}
	137	}
57a6839d	138	result = static_cast<ListFormatInternal*>(listPatternHash->get(key));
51004dcb A	139	}
	140	if (result != NULL) {
	141	return result;
	142	}
57a6839d	143	result = loadListFormatInternal(locale, style, errorCode);
51004dcb A	144	if (U_FAILURE(errorCode)) {
	145	return NULL;
	146	}
	147
	148	{
	149	Mutex m(&listFormatterMutex);
57a6839d	150	ListFormatInternal* temp = static_cast<ListFormatInternal*>(listPatternHash->get(key));
51004dcb A	151	if (temp != NULL) {
	152	delete result;
	153	result = temp;
	154	} else {
	155	listPatternHash->put(key, result, errorCode);
	156	if (U_FAILURE(errorCode)) {
	157	return NULL;
	158	}
	159	}
	160	}
	161	return result;
	162	}
	163
f3c0d7a5 A	164	static const UChar solidus = 0x2F;
	165	static const UChar aliasPrefix[] = { 0x6C,0x69,0x73,0x74,0x50,0x61,0x74,0x74,0x65,0x72,0x6E,0x2F }; // "listPattern/"
	166	enum {
	167	kAliasPrefixLen = UPRV_LENGTHOF(aliasPrefix),
	168	kStyleLenMax = 24 // longest currently is 14
	169	};
	170
	171	struct ListFormatter::ListPatternsSink : public ResourceSink {
	172	UnicodeString two, start, middle, end;
	173	#if ((U_PLATFORM == U_PF_AIX) \|\| (U_PLATFORM == U_PF_OS390)) && (U_CPLUSPLUS_VERSION < 11)
	174	char aliasedStyle[kStyleLenMax+1];
	175	ListPatternsSink() {
	176	uprv_memset(aliasedStyle, 0, kStyleLenMax+1);
	177	}
	178	#else
	179	char aliasedStyle[kStyleLenMax+1] = {0};
	180
	181	ListPatternsSink() {}
	182	#endif
	183	virtual ~ListPatternsSink();
	184
	185	void setAliasedStyle(UnicodeString alias) {
	186	int32_t startIndex = alias.indexOf(aliasPrefix, kAliasPrefixLen, 0);
	187	if (startIndex < 0) {
	188	return;
	189	}
	190	startIndex += kAliasPrefixLen;
	191	int32_t endIndex = alias.indexOf(solidus, startIndex);
	192	if (endIndex < 0) {
	193	endIndex = alias.length();
	194	}
	195	alias.extract(startIndex, endIndex-startIndex, aliasedStyle, kStyleLenMax+1, US_INV);
	196	aliasedStyle[kStyleLenMax] = 0;
	197	}
	198
	199	void handleValueForPattern(ResourceValue &value, UnicodeString &pattern, UErrorCode &errorCode) {
	200	if (pattern.isEmpty()) {
	201	if (value.getType() == URES_ALIAS) {
	202	if (aliasedStyle[0] == 0) {
	203	setAliasedStyle(value.getAliasUnicodeString(errorCode));
	204	}
	205	} else {
	206	pattern = value.getUnicodeString(errorCode);
	207	}
	208	}
	209	}
	210
	211	virtual void put(const char key, ResourceValue &value, UBool /noFallback*/,
	212	UErrorCode &errorCode) {
	213	aliasedStyle[0] = 0;
	214	if (value.getType() == URES_ALIAS) {
	215	setAliasedStyle(value.getAliasUnicodeString(errorCode));
	216	return;
	217	}
	218	ResourceTable listPatterns = value.getTable(errorCode);
	219	for (int i = 0; U_SUCCESS(errorCode) && listPatterns.getKeyAndValue(i, key, value); ++i) {
	220	if (uprv_strcmp(key, "2") == 0) {
	221	handleValueForPattern(value, two, errorCode);
	222	} else if (uprv_strcmp(key, "end") == 0) {
	223	handleValueForPattern(value, end, errorCode);
	224	} else if (uprv_strcmp(key, "middle") == 0) {
	225	handleValueForPattern(value, middle, errorCode);
	226	} else if (uprv_strcmp(key, "start") == 0) {
	227	handleValueForPattern(value, start, errorCode);
228	}
229	}
230	}
231	};
232
233	// Virtual destructors must be defined out of line.
234	ListFormatter::ListPatternsSink::~ListPatternsSink() {}
235
236	ListFormatInternal* ListFormatter::loadListFormatInternal(
57a6839d	237	const Locale& locale, const char * style, UErrorCode& errorCode) {
51004dcb	238	UResourceBundle* rb = ures_open(NULL, locale.getName(), &errorCode);
f3c0d7a5	239	rb = ures_getByKeyWithFallback(rb, "listPattern", rb, &errorCode);
51004dcb A	240	if (U_FAILURE(errorCode)) {
	241	ures_close(rb);
	242	return NULL;
	243	}
f3c0d7a5 A	244	ListFormatter::ListPatternsSink sink;
	245	char currentStyle[kStyleLenMax+1];
	246	uprv_strncpy(currentStyle, style, kStyleLenMax);
	247	currentStyle[kStyleLenMax] = 0;
57a6839d	248
f3c0d7a5 A	249	for (;;) {
	250	ures_getAllItemsWithFallback(rb, currentStyle, sink, errorCode);
	251	if (U_FAILURE(errorCode) \|\| sink.aliasedStyle[0] == 0 \|\| uprv_strcmp(currentStyle, sink.aliasedStyle) == 0) {
	252	break;
	253	}
	254	uprv_strcpy(currentStyle, sink.aliasedStyle);
51004dcb	255	}
51004dcb A	256	ures_close(rb);
	257	if (U_FAILURE(errorCode)) {
	258	return NULL;
	259	}
f3c0d7a5 A	260	if (sink.two.isEmpty() \|\| sink.start.isEmpty() \|\| sink.middle.isEmpty() \|\| sink.end.isEmpty()) {
	261	errorCode = U_MISSING_RESOURCE_ERROR;
	262	return NULL;
	263	}
	264	ListFormatInternal* result = new ListFormatInternal(sink.two, sink.start, sink.middle, sink.end, errorCode);
51004dcb A	265	if (result == NULL) {
	266	errorCode = U_MEMORY_ALLOCATION_ERROR;
	267	return NULL;
	268	}
2ca993e8 A	269	if (U_FAILURE(errorCode)) {
	270	delete result;
	271	return NULL;
	272	}
51004dcb A	273	return result;
	274	}
	275
51004dcb A	276	ListFormatter* ListFormatter::createInstance(UErrorCode& errorCode) {
	277	Locale locale; // The default locale.
	278	return createInstance(locale, errorCode);
	279	}
	280
	281	ListFormatter* ListFormatter::createInstance(const Locale& locale, UErrorCode& errorCode) {
57a6839d A	282	return createInstance(locale, STANDARD_STYLE, errorCode);
	283	}
	284
	285	ListFormatter* ListFormatter::createInstance(const Locale& locale, const char *style, UErrorCode& errorCode) {
51004dcb	286	Locale tempLocale = locale;
57a6839d	287	const ListFormatInternal* listFormatInternal = getListFormatInternal(tempLocale, style, errorCode);
51004dcb A	288	if (U_FAILURE(errorCode)) {
	289	return NULL;
	290	}
57a6839d	291	ListFormatter* p = new ListFormatter(listFormatInternal);
51004dcb A	292	if (p == NULL) {
	293	errorCode = U_MEMORY_ALLOCATION_ERROR;
	294	return NULL;
	295	}
	296	return p;
	297	}
	298
2ca993e8 A	299	ListFormatter::ListFormatter(const ListFormatData& listFormatData, UErrorCode &errorCode) {
2ca993e8 A	300	owned = new ListFormatInternal(listFormatData, errorCode);
57a6839d	301	data = owned;
51004dcb A	302	}
51004dcb A	303
57a6839d A	304	ListFormatter::ListFormatter(const ListFormatInternal* listFormatterInternal) : owned(NULL), data(listFormatterInternal) {
57a6839d A	305	}
51004dcb	306
57a6839d A	307	ListFormatter::~ListFormatter() {
57a6839d A	308	delete owned;
51004dcb A	309	}
	310
	311	/**
57a6839d A	312	* Joins first and second using the pattern pat.
	313	* On entry offset is an offset into first or -1 if offset unspecified.
	314	* On exit offset is offset of second in result if recordOffset was set
	315	* Otherwise if it was >=0 it is set to point into result where it used
b331163b A	316	* to point into first. On exit, result is the join of first and second
b331163b A	317	* according to pat. Any previous value of result gets replaced.
51004dcb	318	*/
b331163b	319	static void joinStringsAndReplace(
2ca993e8	320	const SimpleFormatter& pat,
57a6839d A	321	const UnicodeString& first,
	322	const UnicodeString& second,
	323	UnicodeString &result,
	324	UBool recordOffset,
	325	int32_t &offset,
	326	UErrorCode& errorCode) {
51004dcb A	327	if (U_FAILURE(errorCode)) {
	328	return;
	329	}
57a6839d A	330	const UnicodeString *params[2] = {&first, &second};
57a6839d A	331	int32_t offsets[2];
b331163b	332	pat.formatAndReplace(
57a6839d	333	params,
b331163b	334	UPRV_LENGTHOF(params),
57a6839d A	335	result,
57a6839d A	336	offsets,
b331163b	337	UPRV_LENGTHOF(offsets),
57a6839d A	338	errorCode);
57a6839d A	339	if (U_FAILURE(errorCode)) {
51004dcb A	340	return;
51004dcb A	341	}
57a6839d A	342	if (offsets[0] == -1 \|\| offsets[1] == -1) {
57a6839d A	343	errorCode = U_INVALID_FORMAT_ERROR;
51004dcb A	344	return;
51004dcb A	345	}
57a6839d A	346	if (recordOffset) {
	347	offset = offsets[1];
	348	} else if (offset >= 0) {
	349	offset += offsets[0];
	350	}
	351	}
51004dcb	352
57a6839d A	353	UnicodeString& ListFormatter::format(
	354	const UnicodeString items[],
	355	int32_t nItems,
	356	UnicodeString& appendTo,
	357	UErrorCode& errorCode) const {
	358	int32_t offset;
	359	return format(items, nItems, appendTo, -1, offset, errorCode);
	360	}
51004dcb	361
57a6839d A	362	UnicodeString& ListFormatter::format(
	363	const UnicodeString items[],
	364	int32_t nItems,
	365	UnicodeString& appendTo,
	366	int32_t index,
	367	int32_t &offset,
	368	UErrorCode& errorCode) const {
	369	offset = -1;
	370	if (U_FAILURE(errorCode)) {
	371	return appendTo;
	372	}
	373	if (data == NULL) {
	374	errorCode = U_INVALID_STATE_ERROR;
	375	return appendTo;
51004dcb A	376	}
51004dcb A	377
57a6839d A	378	if (nItems <= 0) {
	379	return appendTo;
	380	}
	381	if (nItems == 1) {
	382	if (index == 0) {
	383	offset = appendTo.length();
	384	}
	385	appendTo.append(items[0]);
	386	return appendTo;
	387	}
b331163b	388	UnicodeString result(items[0]);
57a6839d A	389	if (index == 0) {
	390	offset = 0;
	391	}
b331163b A	392	joinStringsAndReplace(
	393	nItems == 2 ? data->twoPattern : data->startPattern,
	394	result,
57a6839d	395	items[1],
b331163b	396	result,
57a6839d A	397	index == 1,
	398	offset,
	399	errorCode);
b331163b A	400	if (nItems > 2) {
	401	for (int32_t i = 2; i < nItems - 1; ++i) {
	402	joinStringsAndReplace(
	403	data->middlePattern,
	404	result,
	405	items[i],
	406	result,
	407	index == i,
	408	offset,
	409	errorCode);
	410	}
	411	joinStringsAndReplace(
	412	data->endPattern,
	413	result,
	414	items[nItems - 1],
	415	result,
	416	index == nItems - 1,
	417	offset,
	418	errorCode);
57a6839d	419	}
57a6839d A	420	if (U_SUCCESS(errorCode)) {
	421	if (offset >= 0) {
	422	offset += appendTo.length();
	423	}
b331163b	424	appendTo += result;
57a6839d A	425	}
57a6839d A	426	return appendTo;
51004dcb A	427	}
	428
	429	U_NAMESPACE_END