[apple/icu.git] / icuSources / i18n / collationdatawriter.cpp

/*
*******************************************************************************
* Copyright (C) 2013-2014, International Business Machines
* Corporation and others.  All Rights Reserved.
*******************************************************************************
* collationdatawriter.cpp
*
* created on: 2013aug06
* created by: Markus W. Scherer
*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_COLLATION

#include "unicode/tblcoll.h"
#include "unicode/udata.h"
#include "unicode/uniset.h"
#include "cmemory.h"
#include "collationdata.h"
#include "collationdatabuilder.h"
#include "collationdatareader.h"
#include "collationdatawriter.h"
#include "collationfastlatin.h"
#include "collationsettings.h"
#include "collationtailoring.h"
#include "uassert.h"
#include "ucmndata.h"

U_NAMESPACE_BEGIN

uint8_t *
RuleBasedCollator::cloneRuleData(int32_t &length, UErrorCode &errorCode) const {
    if(U_FAILURE(errorCode)) { return NULL; }
    LocalMemory<uint8_t> buffer((uint8_t *)uprv_malloc(20000));
    if(buffer.isNull()) {
        errorCode = U_MEMORY_ALLOCATION_ERROR;
        return NULL;
    }
    length = cloneBinary(buffer.getAlias(), 20000, errorCode);
    if(errorCode == U_BUFFER_OVERFLOW_ERROR) {
        if(buffer.allocateInsteadAndCopy(length, 0) == NULL) {
            errorCode = U_MEMORY_ALLOCATION_ERROR;
            return NULL;
        }
        errorCode = U_ZERO_ERROR;
        length = cloneBinary(buffer.getAlias(), length, errorCode);
    }
    if(U_FAILURE(errorCode)) { return NULL; }
    return buffer.orphan();
}

int32_t
RuleBasedCollator::cloneBinary(uint8_t *dest, int32_t capacity, UErrorCode &errorCode) const {
    int32_t indexes[CollationDataReader::IX_TOTAL_SIZE + 1];
    return CollationDataWriter::writeTailoring(
            *tailoring, *settings, indexes, dest, capacity,
            errorCode);
}

static const UDataInfo dataInfo = {
    sizeof(UDataInfo),
    0,

    U_IS_BIG_ENDIAN,
    U_CHARSET_FAMILY,
    U_SIZEOF_UCHAR,
    0,

    { 0x55, 0x43, 0x6f, 0x6c },         // dataFormat="UCol"
    { 4, 0, 0, 0 },                     // formatVersion
    { 6, 3, 0, 0 }                      // dataVersion
};

int32_t
CollationDataWriter::writeBase(const CollationData &data, const CollationSettings &settings,
                               const void *rootElements, int32_t rootElementsLength,
                               int32_t indexes[], uint8_t *dest, int32_t capacity,
                               UErrorCode &errorCode) {
    return write(TRUE, NULL,
                 data, settings,
                 rootElements, rootElementsLength,
                 indexes, dest, capacity, errorCode);
}

int32_t
CollationDataWriter::writeTailoring(const CollationTailoring &t, const CollationSettings &settings,
                                    int32_t indexes[], uint8_t *dest, int32_t capacity,
                                    UErrorCode &errorCode) {
    return write(FALSE, t.version,
                 *t.data, settings,
                 NULL, 0,
                 indexes, dest, capacity, errorCode);
}

int32_t
CollationDataWriter::write(UBool isBase, const UVersionInfo dataVersion,
                           const CollationData &data, const CollationSettings &settings,
                           const void *rootElements, int32_t rootElementsLength,
                           int32_t indexes[], uint8_t *dest, int32_t capacity,
                           UErrorCode &errorCode) {
    if(U_FAILURE(errorCode)) { return 0; }
    if(capacity < 0 || (capacity > 0 && dest == NULL)) {
        errorCode = U_ILLEGAL_ARGUMENT_ERROR;
        return 0;
    }

    // Figure out which data items to write before settling on
    // the indexes length and writing offsets.
    // For any data item, we need to write the start and limit offsets,
    // so the indexes length must be at least index-of-start-offset + 2.
    int32_t indexesLength;
    UBool hasMappings;
    UnicodeSet unsafeBackwardSet;
    const CollationData *baseData = data.base;

    int32_t fastLatinVersion;
    if(data.fastLatinTable != NULL) {
        fastLatinVersion = (int32_t)CollationFastLatin::VERSION << 16;
    } else {
        fastLatinVersion = 0;
    }
    int32_t fastLatinTableLength = 0;

    if(isBase) {
        // For the root collator, we write an even number of indexes
        // so that we start with an 8-aligned offset.
        indexesLength = CollationDataReader::IX_TOTAL_SIZE + 1;
        U_ASSERT(settings.reorderCodesLength == 0);
        hasMappings = TRUE;
        unsafeBackwardSet = *data.unsafeBackwardSet;
        fastLatinTableLength = data.fastLatinTableLength;
    } else if(baseData == NULL) {
        hasMappings = FALSE;
        if(settings.reorderCodesLength == 0) {
            // only options
            indexesLength = CollationDataReader::IX_OPTIONS + 1;  // no limit offset here
        } else {
            // only options, reorder codes, and the reorder table
            indexesLength = CollationDataReader::IX_REORDER_TABLE_OFFSET + 2;
        }
    } else {
        hasMappings = TRUE;
        // Tailored mappings, and what else?
        // Check in ascending order of optional tailoring data items.
        indexesLength = CollationDataReader::IX_CE32S_OFFSET + 2;
        if(data.contextsLength != 0) {
            indexesLength = CollationDataReader::IX_CONTEXTS_OFFSET + 2;
        }
        unsafeBackwardSet.addAll(*data.unsafeBackwardSet).removeAll(*baseData->unsafeBackwardSet);
        if(!unsafeBackwardSet.isEmpty()) {
            indexesLength = CollationDataReader::IX_UNSAFE_BWD_OFFSET + 2;
        }
        if(data.fastLatinTable != baseData->fastLatinTable) {
            fastLatinTableLength = data.fastLatinTableLength;
            indexesLength = CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET + 2;
        }
    }

    int32_t headerSize;
    if(isBase) {
        headerSize = 0;  // udata_create() writes the header
    } else {
        DataHeader header;
        header.dataHeader.magic1 = 0xda;
        header.dataHeader.magic2 = 0x27;
        uprv_memcpy(&header.info, &dataInfo, sizeof(UDataInfo));
        uprv_memcpy(header.info.dataVersion, dataVersion, sizeof(UVersionInfo));
        headerSize = (int32_t)sizeof(header);
        U_ASSERT((headerSize & 3) == 0);  // multiple of 4 bytes
        if(hasMappings && data.cesLength != 0) {
            // Sum of the sizes of the data items which are
            // not automatically multiples of 8 bytes and which are placed before the CEs.
            int32_t sum = headerSize + (indexesLength + settings.reorderCodesLength) * 4;
            if((sum & 7) != 0) {
                // We need to add padding somewhere so that the 64-bit CEs are 8-aligned.
                // We add to the header size here.
                // Alternatively, we could increment the indexesLength
                // or add a few bytes to the reorderTable.
                headerSize += 4;
            }
        }
        header.dataHeader.headerSize = (uint16_t)headerSize;
        if(headerSize <= capacity) {
            uprv_memcpy(dest, &header, sizeof(header));
            // Write 00 bytes so that the padding is not mistaken for a copyright string.
            uprv_memset(dest + sizeof(header), 0, headerSize - (int32_t)sizeof(header));
            dest += headerSize;
            capacity -= headerSize;
        } else {
            dest = NULL;
            capacity = 0;
        }
    }

    indexes[CollationDataReader::IX_INDEXES_LENGTH] = indexesLength;
    U_ASSERT((settings.options & ~0xffff) == 0);
    indexes[CollationDataReader::IX_OPTIONS] =
            data.numericPrimary | fastLatinVersion | settings.options;
    indexes[CollationDataReader::IX_RESERVED2] = 0;
    indexes[CollationDataReader::IX_RESERVED3] = 0;

    // Byte offsets of data items all start from the start of the indexes.
    // We add the headerSize at the very end.
    int32_t totalSize = indexesLength * 4;

    if(hasMappings && (isBase || data.jamoCE32s != baseData->jamoCE32s)) {
        indexes[CollationDataReader::IX_JAMO_CE32S_START] = data.jamoCE32s - data.ce32s;
    } else {
        indexes[CollationDataReader::IX_JAMO_CE32S_START] = -1;
    }

    indexes[CollationDataReader::IX_REORDER_CODES_OFFSET] = totalSize;
    totalSize += settings.reorderCodesLength * 4;

    indexes[CollationDataReader::IX_REORDER_TABLE_OFFSET] = totalSize;
    if(settings.reorderTable != NULL) {
        totalSize += 256;
    }

    indexes[CollationDataReader::IX_TRIE_OFFSET] = totalSize;
    if(hasMappings) {
        UErrorCode errorCode2 = U_ZERO_ERROR;
        int32_t length;
        if(totalSize < capacity) {
            length = utrie2_serialize(data.trie, dest + totalSize,
                                      capacity - totalSize, &errorCode2);
        } else {
            length = utrie2_serialize(data.trie, NULL, 0, &errorCode2);
        }
        if(U_FAILURE(errorCode2) && errorCode2 != U_BUFFER_OVERFLOW_ERROR) {
            errorCode = errorCode2;
            return 0;
        }
        // The trie size should be a multiple of 8 bytes due to the way
        // compactIndex2(UNewTrie2 *trie) currently works.
        U_ASSERT((length & 7) == 0);
        totalSize += length;
    }

    indexes[CollationDataReader::IX_RESERVED8_OFFSET] = totalSize;
    indexes[CollationDataReader::IX_CES_OFFSET] = totalSize;
    if(hasMappings && data.cesLength != 0) {
        U_ASSERT(((headerSize + totalSize) & 7) == 0);
        totalSize += data.cesLength * 8;
    }

    indexes[CollationDataReader::IX_RESERVED10_OFFSET] = totalSize;
    indexes[CollationDataReader::IX_CE32S_OFFSET] = totalSize;
    if(hasMappings) {
        totalSize += data.ce32sLength * 4;
    }

    indexes[CollationDataReader::IX_ROOT_ELEMENTS_OFFSET] = totalSize;
    totalSize += rootElementsLength * 4;

    indexes[CollationDataReader::IX_CONTEXTS_OFFSET] = totalSize;
    if(hasMappings) {
        totalSize += data.contextsLength * 2;
    }

    indexes[CollationDataReader::IX_UNSAFE_BWD_OFFSET] = totalSize;
    if(hasMappings && !unsafeBackwardSet.isEmpty()) {
        UErrorCode errorCode2 = U_ZERO_ERROR;
        int32_t length;
        if(totalSize < capacity) {
            uint16_t *p = reinterpret_cast<uint16_t *>(dest + totalSize);
            length = unsafeBackwardSet.serialize(
                    p, (capacity - totalSize) / 2, errorCode2);
        } else {
            length = unsafeBackwardSet.serialize(NULL, 0, errorCode2);
        }
        if(U_FAILURE(errorCode2) && errorCode2 != U_BUFFER_OVERFLOW_ERROR) {
            errorCode = errorCode2;
            return 0;
        }
        totalSize += length * 2;
    }

    indexes[CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET] = totalSize;
    totalSize += fastLatinTableLength * 2;

    indexes[CollationDataReader::IX_SCRIPTS_OFFSET] = totalSize;
    if(isBase) {
        totalSize += data.scriptsLength * 2;
    }

    indexes[CollationDataReader::IX_COMPRESSIBLE_BYTES_OFFSET] = totalSize;
    if(isBase) {
        totalSize += 256;
    }

    indexes[CollationDataReader::IX_RESERVED18_OFFSET] = totalSize;
    indexes[CollationDataReader::IX_TOTAL_SIZE] = totalSize;

    if(totalSize > capacity) {
        errorCode = U_BUFFER_OVERFLOW_ERROR;
        return headerSize + totalSize;
    }

    uprv_memcpy(dest, indexes, indexesLength * 4);
    copyData(indexes, CollationDataReader::IX_REORDER_CODES_OFFSET, settings.reorderCodes, dest);
    copyData(indexes, CollationDataReader::IX_REORDER_TABLE_OFFSET, settings.reorderTable, dest);
    // The trie has already been serialized into the dest buffer.
    copyData(indexes, CollationDataReader::IX_CES_OFFSET, data.ces, dest);
    copyData(indexes, CollationDataReader::IX_CE32S_OFFSET, data.ce32s, dest);
    copyData(indexes, CollationDataReader::IX_ROOT_ELEMENTS_OFFSET, rootElements, dest);
    copyData(indexes, CollationDataReader::IX_CONTEXTS_OFFSET, data.contexts, dest);
    // The unsafeBackwardSet has already been serialized into the dest buffer.
    copyData(indexes, CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET, data.fastLatinTable, dest);
    copyData(indexes, CollationDataReader::IX_SCRIPTS_OFFSET, data.scripts, dest);
    copyData(indexes, CollationDataReader::IX_COMPRESSIBLE_BYTES_OFFSET, data.compressibleBytes, dest);

    return headerSize + totalSize;
}

void
CollationDataWriter::copyData(const int32_t indexes[], int32_t startIndex,
                              const void *src, uint8_t *dest) {
    int32_t start = indexes[startIndex];
    int32_t limit = indexes[startIndex + 1];
    if(start < limit) {
        uprv_memcpy(dest + start, src, limit - start);
    }
}

U_NAMESPACE_END

#endif  // !UCONFIG_NO_COLLATION
Commit	Line	Data
57a6839d A	1	/*
	2	*******************************************************************************
	3	* Copyright (C) 2013-2014, International Business Machines
	4	* Corporation and others. All Rights Reserved.
	5	*******************************************************************************
	6	* collationdatawriter.cpp
	7	*
	8	* created on: 2013aug06
	9	* created by: Markus W. Scherer
	10	*/
	11
	12	#include "unicode/utypes.h"
	13
	14	#if !UCONFIG_NO_COLLATION
	15
	16	#include "unicode/tblcoll.h"
	17	#include "unicode/udata.h"
	18	#include "unicode/uniset.h"
	19	#include "cmemory.h"
	20	#include "collationdata.h"
	21	#include "collationdatabuilder.h"
	22	#include "collationdatareader.h"
	23	#include "collationdatawriter.h"
	24	#include "collationfastlatin.h"
	25	#include "collationsettings.h"
	26	#include "collationtailoring.h"
	27	#include "uassert.h"
	28	#include "ucmndata.h"
	29
	30	U_NAMESPACE_BEGIN
	31
	32	uint8_t *
	33	RuleBasedCollator::cloneRuleData(int32_t &length, UErrorCode &errorCode) const {
	34	if(U_FAILURE(errorCode)) { return NULL; }
	35	LocalMemory<uint8_t> buffer((uint8_t *)uprv_malloc(20000));
	36	if(buffer.isNull()) {
	37	errorCode = U_MEMORY_ALLOCATION_ERROR;
	38	return NULL;
	39	}
	40	length = cloneBinary(buffer.getAlias(), 20000, errorCode);
	41	if(errorCode == U_BUFFER_OVERFLOW_ERROR) {
	42	if(buffer.allocateInsteadAndCopy(length, 0) == NULL) {
	43	errorCode = U_MEMORY_ALLOCATION_ERROR;
	44	return NULL;
	45	}
	46	errorCode = U_ZERO_ERROR;
	47	length = cloneBinary(buffer.getAlias(), length, errorCode);
	48	}
	49	if(U_FAILURE(errorCode)) { return NULL; }
	50	return buffer.orphan();
	51	}
	52
	53	int32_t
	54	RuleBasedCollator::cloneBinary(uint8_t *dest, int32_t capacity, UErrorCode &errorCode) const {
	55	int32_t indexes[CollationDataReader::IX_TOTAL_SIZE + 1];
	56	return CollationDataWriter::writeTailoring(
	57	tailoring, settings, indexes, dest, capacity,
	58	errorCode);
	59	}
	60
	61	static const UDataInfo dataInfo = {
	62	sizeof(UDataInfo),
	63	0,
	64
65	U_IS_BIG_ENDIAN,
66	U_CHARSET_FAMILY,
67	U_SIZEOF_UCHAR,
68	0,
69
70	{ 0x55, 0x43, 0x6f, 0x6c }, // dataFormat="UCol"
71	{ 4, 0, 0, 0 }, // formatVersion
72	{ 6, 3, 0, 0 } // dataVersion
73	};
74
75	int32_t
76	CollationDataWriter::writeBase(const CollationData &data, const CollationSettings &settings,
77	const void *rootElements, int32_t rootElementsLength,
78	int32_t indexes[], uint8_t *dest, int32_t capacity,
79	UErrorCode &errorCode) {
80	return write(TRUE, NULL,
81	data, settings,
82	rootElements, rootElementsLength,
83	indexes, dest, capacity, errorCode);
84	}
85
86	int32_t
87	CollationDataWriter::writeTailoring(const CollationTailoring &t, const CollationSettings &settings,
88	int32_t indexes[], uint8_t *dest, int32_t capacity,
89	UErrorCode &errorCode) {
90	return write(FALSE, t.version,
91	*t.data, settings,
92	NULL, 0,
93	indexes, dest, capacity, errorCode);
94	}
95
96	int32_t
97	CollationDataWriter::write(UBool isBase, const UVersionInfo dataVersion,
98	const CollationData &data, const CollationSettings &settings,
99	const void *rootElements, int32_t rootElementsLength,
100	int32_t indexes[], uint8_t *dest, int32_t capacity,
101	UErrorCode &errorCode) {
102	if(U_FAILURE(errorCode)) { return 0; }
103	if(capacity < 0 \|\| (capacity > 0 && dest == NULL)) {
104	errorCode = U_ILLEGAL_ARGUMENT_ERROR;
105	return 0;
106	}
107
108	// Figure out which data items to write before settling on
109	// the indexes length and writing offsets.
110	// For any data item, we need to write the start and limit offsets,
111	// so the indexes length must be at least index-of-start-offset + 2.
112	int32_t indexesLength;
113	UBool hasMappings;
114	UnicodeSet unsafeBackwardSet;
115	const CollationData *baseData = data.base;
116
117	int32_t fastLatinVersion;
118	if(data.fastLatinTable != NULL) {
119	fastLatinVersion = (int32_t)CollationFastLatin::VERSION << 16;
120	} else {
121	fastLatinVersion = 0;
122	}
123	int32_t fastLatinTableLength = 0;
124
125	if(isBase) {
126	// For the root collator, we write an even number of indexes
127	// so that we start with an 8-aligned offset.
128	indexesLength = CollationDataReader::IX_TOTAL_SIZE + 1;
129	U_ASSERT(settings.reorderCodesLength == 0);
130	hasMappings = TRUE;
131	unsafeBackwardSet = *data.unsafeBackwardSet;
132	fastLatinTableLength = data.fastLatinTableLength;
133	} else if(baseData == NULL) {
134	hasMappings = FALSE;
135	if(settings.reorderCodesLength == 0) {
136	// only options
137	indexesLength = CollationDataReader::IX_OPTIONS + 1; // no limit offset here
138	} else {
139	// only options, reorder codes, and the reorder table
140	indexesLength = CollationDataReader::IX_REORDER_TABLE_OFFSET + 2;
141	}
142	} else {
143	hasMappings = TRUE;
144	// Tailored mappings, and what else?
145	// Check in ascending order of optional tailoring data items.
146	indexesLength = CollationDataReader::IX_CE32S_OFFSET + 2;
147	if(data.contextsLength != 0) {
148	indexesLength = CollationDataReader::IX_CONTEXTS_OFFSET + 2;
149	}
150	unsafeBackwardSet.addAll(data.unsafeBackwardSet).removeAll(baseData->unsafeBackwardSet);
151	if(!unsafeBackwardSet.isEmpty()) {
152	indexesLength = CollationDataReader::IX_UNSAFE_BWD_OFFSET + 2;
153	}
154	if(data.fastLatinTable != baseData->fastLatinTable) {
155	fastLatinTableLength = data.fastLatinTableLength;
156	indexesLength = CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET + 2;
157	}
158	}
159
160	int32_t headerSize;
161	if(isBase) {
162	headerSize = 0; // udata_create() writes the header
163	} else {
164	DataHeader header;
165	header.dataHeader.magic1 = 0xda;
166	header.dataHeader.magic2 = 0x27;
167	uprv_memcpy(&header.info, &dataInfo, sizeof(UDataInfo));
168	uprv_memcpy(header.info.dataVersion, dataVersion, sizeof(UVersionInfo));
169	headerSize = (int32_t)sizeof(header);
170	U_ASSERT((headerSize & 3) == 0); // multiple of 4 bytes
171	if(hasMappings && data.cesLength != 0) {
172	// Sum of the sizes of the data items which are
173	// not automatically multiples of 8 bytes and which are placed before the CEs.
174	int32_t sum = headerSize + (indexesLength + settings.reorderCodesLength) * 4;
175	if((sum & 7) != 0) {
176	// We need to add padding somewhere so that the 64-bit CEs are 8-aligned.
177	// We add to the header size here.
178	// Alternatively, we could increment the indexesLength
179	// or add a few bytes to the reorderTable.
180	headerSize += 4;
181	}
182	}
183	header.dataHeader.headerSize = (uint16_t)headerSize;
184	if(headerSize <= capacity) {
185	uprv_memcpy(dest, &header, sizeof(header));
186	// Write 00 bytes so that the padding is not mistaken for a copyright string.
187	uprv_memset(dest + sizeof(header), 0, headerSize - (int32_t)sizeof(header));
188	dest += headerSize;
189	capacity -= headerSize;
190	} else {
191	dest = NULL;
192	capacity = 0;
193	}
194	}
195
196	indexes[CollationDataReader::IX_INDEXES_LENGTH] = indexesLength;
197	U_ASSERT((settings.options & ~0xffff) == 0);
198	indexes[CollationDataReader::IX_OPTIONS] =
199	data.numericPrimary \| fastLatinVersion \| settings.options;
200	indexes[CollationDataReader::IX_RESERVED2] = 0;
201	indexes[CollationDataReader::IX_RESERVED3] = 0;
202
203	// Byte offsets of data items all start from the start of the indexes.
204	// We add the headerSize at the very end.
205	int32_t totalSize = indexesLength * 4;
206
207	if(hasMappings && (isBase \|\| data.jamoCE32s != baseData->jamoCE32s)) {
208	indexes[CollationDataReader::IX_JAMO_CE32S_START] = data.jamoCE32s - data.ce32s;
209	} else {
210	indexes[CollationDataReader::IX_JAMO_CE32S_START] = -1;
211	}
212
213	indexes[CollationDataReader::IX_REORDER_CODES_OFFSET] = totalSize;
214	totalSize += settings.reorderCodesLength * 4;
215
216	indexes[CollationDataReader::IX_REORDER_TABLE_OFFSET] = totalSize;
217	if(settings.reorderTable != NULL) {
218	totalSize += 256;
219	}
220
221	indexes[CollationDataReader::IX_TRIE_OFFSET] = totalSize;
222	if(hasMappings) {
223	UErrorCode errorCode2 = U_ZERO_ERROR;
224	int32_t length;
225	if(totalSize < capacity) {
226	length = utrie2_serialize(data.trie, dest + totalSize,
227	capacity - totalSize, &errorCode2);
228	} else {
229	length = utrie2_serialize(data.trie, NULL, 0, &errorCode2);
230	}
231	if(U_FAILURE(errorCode2) && errorCode2 != U_BUFFER_OVERFLOW_ERROR) {
232	errorCode = errorCode2;
233	return 0;
234	}
235	// The trie size should be a multiple of 8 bytes due to the way
236	// compactIndex2(UNewTrie2 *trie) currently works.
237	U_ASSERT((length & 7) == 0);
238	totalSize += length;
239	}
240
241	indexes[CollationDataReader::IX_RESERVED8_OFFSET] = totalSize;
242	indexes[CollationDataReader::IX_CES_OFFSET] = totalSize;
243	if(hasMappings && data.cesLength != 0) {
244	U_ASSERT(((headerSize + totalSize) & 7) == 0);
245	totalSize += data.cesLength * 8;
246	}
247
248	indexes[CollationDataReader::IX_RESERVED10_OFFSET] = totalSize;
249	indexes[CollationDataReader::IX_CE32S_OFFSET] = totalSize;
250	if(hasMappings) {
251	totalSize += data.ce32sLength * 4;
252	}
253
254	indexes[CollationDataReader::IX_ROOT_ELEMENTS_OFFSET] = totalSize;
255	totalSize += rootElementsLength * 4;
256
257	indexes[CollationDataReader::IX_CONTEXTS_OFFSET] = totalSize;
258	if(hasMappings) {
259	totalSize += data.contextsLength * 2;
260	}
261
262	indexes[CollationDataReader::IX_UNSAFE_BWD_OFFSET] = totalSize;
263	if(hasMappings && !unsafeBackwardSet.isEmpty()) {
264	UErrorCode errorCode2 = U_ZERO_ERROR;
265	int32_t length;
266	if(totalSize < capacity) {
267	uint16_t p = reinterpret_cast<uint16_t >(dest + totalSize);
268	length = unsafeBackwardSet.serialize(
269	p, (capacity - totalSize) / 2, errorCode2);
270	} else {
271	length = unsafeBackwardSet.serialize(NULL, 0, errorCode2);
272	}
273	if(U_FAILURE(errorCode2) && errorCode2 != U_BUFFER_OVERFLOW_ERROR) {
274	errorCode = errorCode2;
275	return 0;
276	}
277	totalSize += length * 2;
278	}
279
280	indexes[CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET] = totalSize;
281	totalSize += fastLatinTableLength * 2;
282
283	indexes[CollationDataReader::IX_SCRIPTS_OFFSET] = totalSize;
284	if(isBase) {
285	totalSize += data.scriptsLength * 2;
286	}
287
288	indexes[CollationDataReader::IX_COMPRESSIBLE_BYTES_OFFSET] = totalSize;
289	if(isBase) {
290	totalSize += 256;
291	}
292
293	indexes[CollationDataReader::IX_RESERVED18_OFFSET] = totalSize;
294	indexes[CollationDataReader::IX_TOTAL_SIZE] = totalSize;
295
296	if(totalSize > capacity) {
297	errorCode = U_BUFFER_OVERFLOW_ERROR;
298	return headerSize + totalSize;
299	}
300
301	uprv_memcpy(dest, indexes, indexesLength * 4);
302	copyData(indexes, CollationDataReader::IX_REORDER_CODES_OFFSET, settings.reorderCodes, dest);
303	copyData(indexes, CollationDataReader::IX_REORDER_TABLE_OFFSET, settings.reorderTable, dest);
304	// The trie has already been serialized into the dest buffer.
305	copyData(indexes, CollationDataReader::IX_CES_OFFSET, data.ces, dest);
306	copyData(indexes, CollationDataReader::IX_CE32S_OFFSET, data.ce32s, dest);
307	copyData(indexes, CollationDataReader::IX_ROOT_ELEMENTS_OFFSET, rootElements, dest);
308	copyData(indexes, CollationDataReader::IX_CONTEXTS_OFFSET, data.contexts, dest);
309	// The unsafeBackwardSet has already been serialized into the dest buffer.
310	copyData(indexes, CollationDataReader::IX_FAST_LATIN_TABLE_OFFSET, data.fastLatinTable, dest);
311	copyData(indexes, CollationDataReader::IX_SCRIPTS_OFFSET, data.scripts, dest);
312	copyData(indexes, CollationDataReader::IX_COMPRESSIBLE_BYTES_OFFSET, data.compressibleBytes, dest);
313
314	return headerSize + totalSize;
315	}
316
317	void
318	CollationDataWriter::copyData(const int32_t indexes[], int32_t startIndex,
319	const void src, uint8_t dest) {
320	int32_t start = indexes[startIndex];
321	int32_t limit = indexes[startIndex + 1];
322	if(start < limit) {
323	uprv_memcpy(dest + start, src, limit - start);
324	}
325	}
326
327	U_NAMESPACE_END
328
329	#endif // !UCONFIG_NO_COLLATION