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Unified Diff: source/i18n/collationdata.h

Issue 845603002: Update ICU to 54.1 step 1 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/icu.git@master
Patch Set: remove unusued directories Created 5 years, 11 months ago
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Index: source/i18n/collationdata.h
diff --git a/source/i18n/collationdata.h b/source/i18n/collationdata.h
new file mode 100644
index 0000000000000000000000000000000000000000..f24076b8e6474d7e6737106a2dbb5e326426893d
--- /dev/null
+++ b/source/i18n/collationdata.h
@@ -0,0 +1,230 @@
+/*
+*******************************************************************************
+* Copyright (C) 2010-2014, International Business Machines
+* Corporation and others. All Rights Reserved.
+*******************************************************************************
+* collationdata.h
+*
+* created on: 2010oct27
+* created by: Markus W. Scherer
+*/
+
+#ifndef __COLLATIONDATA_H__
+#define __COLLATIONDATA_H__
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_COLLATION
+
+#include "unicode/uniset.h"
+#include "collation.h"
+#include "normalizer2impl.h"
+#include "utrie2.h"
+
+struct UDataMemory;
+
+U_NAMESPACE_BEGIN
+
+/**
+ * Collation data container.
+ * Immutable data created by a CollationDataBuilder, or loaded from a file,
+ * or deserialized from API-provided binary data.
+ *
+ * Includes data for the collation base (root/default), aliased if this is not the base.
+ */
+struct U_I18N_API CollationData : public UMemory {
+ CollationData(const Normalizer2Impl &nfc)
+ : trie(NULL),
+ ce32s(NULL), ces(NULL), contexts(NULL), base(NULL),
+ jamoCE32s(NULL),
+ nfcImpl(nfc),
+ numericPrimary(0x12000000),
+ ce32sLength(0), cesLength(0), contextsLength(0),
+ compressibleBytes(NULL),
+ unsafeBackwardSet(NULL),
+ fastLatinTable(NULL), fastLatinTableLength(0),
+ scripts(NULL), scriptsLength(0),
+ rootElements(NULL), rootElementsLength(0) {}
+
+ uint32_t getCE32(UChar32 c) const {
+ return UTRIE2_GET32(trie, c);
+ }
+
+ uint32_t getCE32FromSupplementary(UChar32 c) const {
+ return UTRIE2_GET32_FROM_SUPP(trie, c);
+ }
+
+ UBool isDigit(UChar32 c) const {
+ return c < 0x660 ? c <= 0x39 && 0x30 <= c :
+ Collation::hasCE32Tag(getCE32(c), Collation::DIGIT_TAG);
+ }
+
+ UBool isUnsafeBackward(UChar32 c, UBool numeric) const {
+ return unsafeBackwardSet->contains(c) || (numeric && isDigit(c));
+ }
+
+ UBool isCompressibleLeadByte(uint32_t b) const {
+ return compressibleBytes[b];
+ }
+
+ inline UBool isCompressiblePrimary(uint32_t p) const {
+ return isCompressibleLeadByte(p >> 24);
+ }
+
+ /**
+ * Returns the CE32 from two contexts words.
+ * Access to the defaultCE32 for contraction and prefix matching.
+ */
+ static uint32_t readCE32(const UChar *p) {
+ return ((uint32_t)p[0] << 16) | p[1];
+ }
+
+ /**
+ * Returns the CE32 for an indirect special CE32 (e.g., with DIGIT_TAG).
+ * Requires that ce32 is special.
+ */
+ uint32_t getIndirectCE32(uint32_t ce32) const;
+ /**
+ * Returns the CE32 for an indirect special CE32 (e.g., with DIGIT_TAG),
+ * if ce32 is special.
+ */
+ uint32_t getFinalCE32(uint32_t ce32) const;
+
+ /**
+ * Computes a CE from c's ce32 which has the OFFSET_TAG.
+ */
+ int64_t getCEFromOffsetCE32(UChar32 c, uint32_t ce32) const {
+ int64_t dataCE = ces[Collation::indexFromCE32(ce32)];
+ return Collation::makeCE(Collation::getThreeBytePrimaryForOffsetData(c, dataCE));
+ }
+
+ /**
+ * Returns the single CE that c maps to.
+ * Sets U_UNSUPPORTED_ERROR if c does not map to a single CE.
+ */
+ int64_t getSingleCE(UChar32 c, UErrorCode &errorCode) const;
+
+ /**
+ * Returns the FCD16 value for code point c. c must be >= 0.
+ */
+ uint16_t getFCD16(UChar32 c) const {
+ return nfcImpl.getFCD16(c);
+ }
+
+ /**
+ * Returns the first primary for the script's reordering group.
+ * @return the primary with only the first primary lead byte of the group
+ * (not necessarily an actual root collator primary weight),
+ * or 0 if the script is unknown
+ */
+ uint32_t getFirstPrimaryForGroup(int32_t script) const;
+
+ /**
+ * Returns the last primary for the script's reordering group.
+ * @return the last primary of the group
+ * (not an actual root collator primary weight),
+ * or 0 if the script is unknown
+ */
+ uint32_t getLastPrimaryForGroup(int32_t script) const;
+
+ /**
+ * Finds the reordering group which contains the primary weight.
+ * @return the first script of the group, or -1 if the weight is beyond the last group
+ */
+ int32_t getGroupForPrimary(uint32_t p) const;
+
+ int32_t getEquivalentScripts(int32_t script,
+ int32_t dest[], int32_t capacity, UErrorCode &errorCode) const;
+
+ /**
+ * Writes the permutation table for the given reordering of scripts and groups,
+ * mapping from default-order primary-weight lead bytes to reordered lead bytes.
+ * The caller checks for illegal arguments and
+ * takes care of [DEFAULT] and memory allocation.
+ */
+ void makeReorderTable(const int32_t *reorder, int32_t length,
+ uint8_t table[256], UErrorCode &errorCode) const;
+
+ /** @see jamoCE32s */
+ static const int32_t JAMO_CE32S_LENGTH = 19 + 21 + 27;
+
+ /** Main lookup trie. */
+ const UTrie2 *trie;
+ /**
+ * Array of CE32 values.
+ * At index 0 there must be CE32(U+0000)
+ * to support U+0000's special-tag for NUL-termination handling.
+ */
+ const uint32_t *ce32s;
+ /** Array of CE values for expansions and OFFSET_TAG. */
+ const int64_t *ces;
+ /** Array of prefix and contraction-suffix matching data. */
+ const UChar *contexts;
+ /** Base collation data, or NULL if this data itself is a base. */
+ const CollationData *base;
+ /**
+ * Simple array of JAMO_CE32S_LENGTH=19+21+27 CE32s, one per canonical Jamo L/V/T.
+ * They are normally simple CE32s, rarely expansions.
+ * For fast handling of HANGUL_TAG.
+ */
+ const uint32_t *jamoCE32s;
+ const Normalizer2Impl &nfcImpl;
+ /** The single-byte primary weight (xx000000) for numeric collation. */
+ uint32_t numericPrimary;
+
+ int32_t ce32sLength;
+ int32_t cesLength;
+ int32_t contextsLength;
+
+ /** 256 flags for which primary-weight lead bytes are compressible. */
+ const UBool *compressibleBytes;
+ /**
+ * Set of code points that are unsafe for starting string comparison after an identical prefix,
+ * or in backwards CE iteration.
+ */
+ const UnicodeSet *unsafeBackwardSet;
+
+ /**
+ * Fast Latin table for common-Latin-text string comparisons.
+ * Data structure see class CollationFastLatin.
+ */
+ const uint16_t *fastLatinTable;
+ int32_t fastLatinTableLength;
+
+ /**
+ * Data for scripts and reordering groups.
+ * Uses include building a reordering permutation table and
+ * providing script boundaries to AlphabeticIndex.
+ *
+ * This data is a sorted list of primary-weight lead byte ranges (reordering groups),
+ * each with a list of pairs sorted in base collation order;
+ * each pair contains a script/reorder code and the lowest primary weight for that script.
+ *
+ * Data structure:
+ * - Each reordering group is encoded in n+2 16-bit integers.
+ * - First integer:
+ * Bits 15..8: First byte of the reordering group's range.
+ * Bits 7..0: Last byte of the reordering group's range.
+ * - Second integer:
+ * Length n of the list of script/reordering codes.
+ * - Each further integer is a script or reordering code.
+ */
+ const uint16_t *scripts;
+ int32_t scriptsLength;
+
+ /**
+ * Collation elements in the root collator.
+ * Used by the CollationRootElements class. The data structure is described there.
+ * NULL in a tailoring.
+ */
+ const uint32_t *rootElements;
+ int32_t rootElementsLength;
+
+private:
+ int32_t findScript(int32_t script) const;
+};
+
+U_NAMESPACE_END
+
+#endif // !UCONFIG_NO_COLLATION
+#endif // __COLLATIONDATA_H__
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