Add m-esr52 at 52.6.0

1 files changed, 390 insertions, 0 deletions

diff --git a/intl/icu/source/i18n/collationdata.cpp b/intl/icu/source/i18n/collationdata.cpp
new file mode 100644
index 000000000..d3a62e4fd
--- /dev/null
+++ b/intl/icu/source/i18n/collationdata.cpp
@@ -0,0 +1,390 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* Copyright (C) 2012-2015, International Business Machines
+* Corporation and others.  All Rights Reserved.
+*******************************************************************************
+* collationdata.cpp
+*
+* created on: 2012jul28
+* created by: Markus W. Scherer
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_COLLATION
+
+#include "unicode/ucol.h"
+#include "unicode/udata.h"
+#include "unicode/uscript.h"
+#include "cmemory.h"
+#include "collation.h"
+#include "collationdata.h"
+#include "uassert.h"
+#include "utrie2.h"
+#include "uvectr32.h"
+
+U_NAMESPACE_BEGIN
+
+uint32_t
+CollationData::getIndirectCE32(uint32_t ce32) const {
+    U_ASSERT(Collation::isSpecialCE32(ce32));
+    int32_t tag = Collation::tagFromCE32(ce32);
+    if(tag == Collation::DIGIT_TAG) {
+        // Fetch the non-numeric-collation CE32.
+        ce32 = ce32s[Collation::indexFromCE32(ce32)];
+    } else if(tag == Collation::LEAD_SURROGATE_TAG) {
+        ce32 = Collation::UNASSIGNED_CE32;
+    } else if(tag == Collation::U0000_TAG) {
+        // Fetch the normal ce32 for U+0000.
+        ce32 = ce32s[0];
+    }
+    return ce32;
+}
+
+uint32_t
+CollationData::getFinalCE32(uint32_t ce32) const {
+    if(Collation::isSpecialCE32(ce32)) {
+        ce32 = getIndirectCE32(ce32);
+    }
+    return ce32;
+}
+
+int64_t
+CollationData::getSingleCE(UChar32 c, UErrorCode &errorCode) const {
+    if(U_FAILURE(errorCode)) { return 0; }
+    // Keep parallel with CollationDataBuilder::getSingleCE().
+    const CollationData *d;
+    uint32_t ce32 = getCE32(c);
+    if(ce32 == Collation::FALLBACK_CE32) {
+        d = base;
+        ce32 = base->getCE32(c);
+    } else {
+        d = this;
+    }
+    while(Collation::isSpecialCE32(ce32)) {
+        switch(Collation::tagFromCE32(ce32)) {
+        case Collation::LATIN_EXPANSION_TAG:
+        case Collation::BUILDER_DATA_TAG:
+        case Collation::PREFIX_TAG:
+        case Collation::CONTRACTION_TAG:
+        case Collation::HANGUL_TAG:
+        case Collation::LEAD_SURROGATE_TAG:
+            errorCode = U_UNSUPPORTED_ERROR;
+            return 0;
+        case Collation::FALLBACK_TAG:
+        case Collation::RESERVED_TAG_3:
+            errorCode = U_INTERNAL_PROGRAM_ERROR;
+            return 0;
+        case Collation::LONG_PRIMARY_TAG:
+            return Collation::ceFromLongPrimaryCE32(ce32);
+        case Collation::LONG_SECONDARY_TAG:
+            return Collation::ceFromLongSecondaryCE32(ce32);
+        case Collation::EXPANSION32_TAG:
+            if(Collation::lengthFromCE32(ce32) == 1) {
+                ce32 = d->ce32s[Collation::indexFromCE32(ce32)];
+                break;
+            } else {
+                errorCode = U_UNSUPPORTED_ERROR;
+                return 0;
+            }
+        case Collation::EXPANSION_TAG: {
+            if(Collation::lengthFromCE32(ce32) == 1) {
+                return d->ces[Collation::indexFromCE32(ce32)];
+            } else {
+                errorCode = U_UNSUPPORTED_ERROR;
+                return 0;
+            }
+        }
+        case Collation::DIGIT_TAG:
+            // Fetch the non-numeric-collation CE32 and continue.
+            ce32 = d->ce32s[Collation::indexFromCE32(ce32)];
+            break;
+        case Collation::U0000_TAG:
+            U_ASSERT(c == 0);
+            // Fetch the normal ce32 for U+0000 and continue.
+            ce32 = d->ce32s[0];
+            break;
+        case Collation::OFFSET_TAG:
+            return d->getCEFromOffsetCE32(c, ce32);
+        case Collation::IMPLICIT_TAG:
+            return Collation::unassignedCEFromCodePoint(c);
+        }
+    }
+    return Collation::ceFromSimpleCE32(ce32);
+}
+
+uint32_t
+CollationData::getFirstPrimaryForGroup(int32_t script) const {
+    int32_t index = getScriptIndex(script);
+    return index == 0 ? 0 : (uint32_t)scriptStarts[index] << 16;
+}
+
+uint32_t
+CollationData::getLastPrimaryForGroup(int32_t script) const {
+    int32_t index = getScriptIndex(script);
+    if(index == 0) {
+        return 0;
+    }
+    uint32_t limit = scriptStarts[index + 1];
+    return (limit << 16) - 1;
+}
+
+int32_t
+CollationData::getGroupForPrimary(uint32_t p) const {
+    p >>= 16;
+    if(p < scriptStarts[1] || scriptStarts[scriptStartsLength - 1] <= p) {
+        return -1;
+    }
+    int32_t index = 1;
+    while(p >= scriptStarts[index + 1]) { ++index; }
+    for(int32_t i = 0; i < numScripts; ++i) {
+        if(scriptsIndex[i] == index) {
+            return i;
+        }
+    }
+    for(int32_t i = 0; i < MAX_NUM_SPECIAL_REORDER_CODES; ++i) {
+        if(scriptsIndex[numScripts + i] == index) {
+            return UCOL_REORDER_CODE_FIRST + i;
+        }
+    }
+    return -1;
+}
+
+int32_t
+CollationData::getScriptIndex(int32_t script) const {
+    if(script < 0) {
+        return 0;
+    } else if(script < numScripts) {
+        return scriptsIndex[script];
+    } else if(script < UCOL_REORDER_CODE_FIRST) {
+        return 0;
+    } else {
+        script -= UCOL_REORDER_CODE_FIRST;
+        if(script < MAX_NUM_SPECIAL_REORDER_CODES) {
+            return scriptsIndex[numScripts + script];
+        } else {
+            return 0;
+        }
+    }
+}
+
+int32_t
+CollationData::getEquivalentScripts(int32_t script,
+                                    int32_t dest[], int32_t capacity,
+                                    UErrorCode &errorCode) const {
+    if(U_FAILURE(errorCode)) { return 0; }
+    int32_t index = getScriptIndex(script);
+    if(index == 0) { return 0; }
+    if(script >= UCOL_REORDER_CODE_FIRST) {
+        // Special groups have no aliases.
+        if(capacity > 0) {
+            dest[0] = script;
+        } else {
+            errorCode = U_BUFFER_OVERFLOW_ERROR;
+        }
+        return 1;
+    }
+
+    int32_t length = 0;
+    for(int32_t i = 0; i < numScripts; ++i) {
+        if(scriptsIndex[i] == index) {
+            if(length < capacity) {
+                dest[length] = i;
+            }
+            ++length;
+        }
+    }
+    if(length > capacity) {
+        errorCode = U_BUFFER_OVERFLOW_ERROR;
+    }
+    return length;
+}
+
+void
+CollationData::makeReorderRanges(const int32_t *reorder, int32_t length,
+                                 UVector32 &ranges, UErrorCode &errorCode) const {
+    makeReorderRanges(reorder, length, FALSE, ranges, errorCode);
+}
+
+void
+CollationData::makeReorderRanges(const int32_t *reorder, int32_t length,
+                                 UBool latinMustMove,
+                                 UVector32 &ranges, UErrorCode &errorCode) const {
+    if(U_FAILURE(errorCode)) { return; }
+    ranges.removeAllElements();
+    if(length == 0 || (length == 1 && reorder[0] == USCRIPT_UNKNOWN)) {
+        return;
+    }
+
+    // Maps each script-or-group range to a new lead byte.
+    uint8_t table[MAX_NUM_SCRIPT_RANGES];
+    uprv_memset(table, 0, sizeof(table));
+
+    {
+        // Set "don't care" values for reserved ranges.
+        int32_t index = scriptsIndex[
+                numScripts + REORDER_RESERVED_BEFORE_LATIN - UCOL_REORDER_CODE_FIRST];
+        if(index != 0) {
+            table[index] = 0xff;
+        }
+        index = scriptsIndex[
+                numScripts + REORDER_RESERVED_AFTER_LATIN - UCOL_REORDER_CODE_FIRST];
+        if(index != 0) {
+            table[index] = 0xff;
+        }
+    }
+
+    // Never reorder special low and high primary lead bytes.
+    U_ASSERT(scriptStartsLength >= 2);
+    U_ASSERT(scriptStarts[0] == 0);
+    int32_t lowStart = scriptStarts[1];
+    U_ASSERT(lowStart == ((Collation::MERGE_SEPARATOR_BYTE + 1) << 8));
+    int32_t highLimit = scriptStarts[scriptStartsLength - 1];
+    U_ASSERT(highLimit == (Collation::TRAIL_WEIGHT_BYTE << 8));
+
+    // Get the set of special reorder codes in the input list.
+    // This supports a fixed number of special reorder codes;
+    // it works for data with codes beyond UCOL_REORDER_CODE_LIMIT.
+    uint32_t specials = 0;
+    for(int32_t i = 0; i < length; ++i) {
+        int32_t reorderCode = reorder[i] - UCOL_REORDER_CODE_FIRST;
+        if(0 <= reorderCode && reorderCode < MAX_NUM_SPECIAL_REORDER_CODES) {
+            specials |= (uint32_t)1 << reorderCode;
+        }
+    }
+
+    // Start the reordering with the special low reorder codes that do not occur in the input.
+    for(int32_t i = 0; i < MAX_NUM_SPECIAL_REORDER_CODES; ++i) {
+        int32_t index = scriptsIndex[numScripts + i];
+        if(index != 0 && (specials & ((uint32_t)1 << i)) == 0) {
+            lowStart = addLowScriptRange(table, index, lowStart);
+        }
+    }
+
+    // Skip the reserved range before Latin if Latin is the first script,
+    // so that we do not move it unnecessarily.
+    int32_t skippedReserved = 0;
+    if(specials == 0 && reorder[0] == USCRIPT_LATIN && !latinMustMove) {
+        int32_t index = scriptsIndex[USCRIPT_LATIN];
+        U_ASSERT(index != 0);
+        int32_t start = scriptStarts[index];
+        U_ASSERT(lowStart <= start);
+        skippedReserved = start - lowStart;
+        lowStart = start;
+    }
+
+    // Reorder according to the input scripts, continuing from the bottom of the primary range.
+    int32_t originalLength = length;  // length will be decremented if "others" is in the list.
+    UBool hasReorderToEnd = FALSE;
+    for(int32_t i = 0; i < length;) {
+        int32_t script = reorder[i++];
+        if(script == USCRIPT_UNKNOWN) {
+            // Put the remaining scripts at the top.
+            hasReorderToEnd = TRUE;
+            while(i < length) {
+                script = reorder[--length];
+                if(script == USCRIPT_UNKNOWN ||  // Must occur at most once.
+                        script == UCOL_REORDER_CODE_DEFAULT) {
+                    errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+                    return;
+                }
+                int32_t index = getScriptIndex(script);
+                if(index == 0) { continue; }
+                if(table[index] != 0) {  // Duplicate or equivalent script.
+                    errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+                    return;
+                }
+                highLimit = addHighScriptRange(table, index, highLimit);
+            }
+            break;
+        }
+        if(script == UCOL_REORDER_CODE_DEFAULT) {
+            // The default code must be the only one in the list, and that is handled by the caller.
+            // Otherwise it must not be used.
+            errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+            return;
+        }
+        int32_t index = getScriptIndex(script);
+        if(index == 0) { continue; }
+        if(table[index] != 0) {  // Duplicate or equivalent script.
+            errorCode = U_ILLEGAL_ARGUMENT_ERROR;
+            return;
+        }
+        lowStart = addLowScriptRange(table, index, lowStart);
+    }
+
+    // Put all remaining scripts into the middle.
+    for(int32_t i = 1; i < scriptStartsLength - 1; ++i) {
+        int32_t leadByte = table[i];
+        if(leadByte != 0) { continue; }
+        int32_t start = scriptStarts[i];
+        if(!hasReorderToEnd && start > lowStart) {
+            // No need to move this script.
+            lowStart = start;
+        }
+        lowStart = addLowScriptRange(table, i, lowStart);
+    }
+    if(lowStart > highLimit) {
+        if((lowStart - (skippedReserved & 0xff00)) <= highLimit) {
+            // Try not skipping the before-Latin reserved range.
+            makeReorderRanges(reorder, originalLength, TRUE, ranges, errorCode);
+            return;
+        }
+        // We need more primary lead bytes than available, despite the reserved ranges.
+        errorCode = U_BUFFER_OVERFLOW_ERROR;
+        return;
+    }
+
+    // Turn lead bytes into a list of (limit, offset) pairs.
+    // Encode each pair in one list element:
+    // Upper 16 bits = limit, lower 16 = signed lead byte offset.
+    int32_t offset = 0;
+    for(int32_t i = 1;; ++i) {
+        int32_t nextOffset = offset;
+        while(i < scriptStartsLength - 1) {
+            int32_t newLeadByte = table[i];
+            if(newLeadByte == 0xff) {
+                // "Don't care" lead byte for reserved range, continue with current offset.
+            } else {
+                nextOffset = newLeadByte - (scriptStarts[i] >> 8);
+                if(nextOffset != offset) { break; }
+            }
+            ++i;
+        }
+        if(offset != 0 || i < scriptStartsLength - 1) {
+            ranges.addElement(((int32_t)scriptStarts[i] << 16) | (offset & 0xffff), errorCode);
+        }
+        if(i == scriptStartsLength - 1) { break; }
+        offset = nextOffset;
+    }
+}
+
+int32_t
+CollationData::addLowScriptRange(uint8_t table[], int32_t index, int32_t lowStart) const {
+    int32_t start = scriptStarts[index];
+    if((start & 0xff) < (lowStart & 0xff)) {
+        lowStart += 0x100;
+    }
+    table[index] = (uint8_t)(lowStart >> 8);
+    int32_t limit = scriptStarts[index + 1];
+    lowStart = ((lowStart & 0xff00) + ((limit & 0xff00) - (start & 0xff00))) | (limit & 0xff);
+    return lowStart;
+}
+
+int32_t
+CollationData::addHighScriptRange(uint8_t table[], int32_t index, int32_t highLimit) const {
+    int32_t limit = scriptStarts[index + 1];
+    if((limit & 0xff) > (highLimit & 0xff)) {
+        highLimit -= 0x100;
+    }
+    int32_t start = scriptStarts[index];
+    highLimit = ((highLimit & 0xff00) - ((limit & 0xff00) - (start & 0xff00))) | (start & 0xff);
+    table[index] = (uint8_t)(highLimit >> 8);
+    return highLimit;
+}
+
+U_NAMESPACE_END
+
+#endif  // !UCONFIG_NO_COLLATION