blob: d839de7e541e3ff1c5cdc66e648c96de466df9f8 [file] [log] [blame]
/*
*******************************************************************************
* Copyright (C) 2013-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* collationsettings.h
*
* created on: 2013feb07
* created by: Markus W. Scherer
*/
#ifndef __COLLATIONSETTINGS_H__
#define __COLLATIONSETTINGS_H__
#include "unicode/utypes.h"
#if !UCONFIG_NO_COLLATION
#include "unicode/ucol.h"
#include "collation.h"
#include "sharedobject.h"
#include "umutex.h"
U_NAMESPACE_BEGIN
struct CollationData;
/**
* Collation settings/options/attributes.
* These are the values that can be changed via API.
*/
struct U_I18N_API CollationSettings : public SharedObject {
/**
* Options bit 0: Perform the FCD check on the input text and deliver normalized text.
*/
static const int32_t CHECK_FCD = 1;
/**
* Options bit 1: Numeric collation.
* Also known as CODAN = COllate Digits As Numbers.
*
* Treat digit sequences as numbers with CE sequences in numeric order,
* rather than returning a normal CE for each digit.
*/
static const int32_t NUMERIC = 2;
/**
* "Shifted" alternate handling, see ALTERNATE_MASK.
*/
static const int32_t SHIFTED = 4;
/**
* Options bits 3..2: Alternate-handling mask. 0 for non-ignorable.
* Reserve values 8 and 0xc for shift-trimmed and blanked.
*/
static const int32_t ALTERNATE_MASK = 0xc;
/**
* Options bits 6..4: The 3-bit maxVariable value bit field is shifted by this value.
*/
static const int32_t MAX_VARIABLE_SHIFT = 4;
/** maxVariable options bit mask before shifting. */
static const int32_t MAX_VARIABLE_MASK = 0x70;
/** Options bit 7: Reserved/unused/0. */
/**
* Options bit 8: Sort uppercase first if caseLevel or caseFirst is on.
*/
static const int32_t UPPER_FIRST = 0x100;
/**
* Options bit 9: Keep the case bits in the tertiary weight (they trump other tertiary values)
* unless case level is on (when they are *moved* into the separate case level).
* By default, the case bits are removed from the tertiary weight (ignored).
*
* When CASE_FIRST is off, UPPER_FIRST must be off too, corresponding to
* the tri-value UCOL_CASE_FIRST attribute: UCOL_OFF vs. UCOL_LOWER_FIRST vs. UCOL_UPPER_FIRST.
*/
static const int32_t CASE_FIRST = 0x200;
/**
* Options bit mask for caseFirst and upperFirst, before shifting.
* Same value as caseFirst==upperFirst.
*/
static const int32_t CASE_FIRST_AND_UPPER_MASK = CASE_FIRST | UPPER_FIRST;
/**
* Options bit 10: Insert the case level between the secondary and tertiary levels.
*/
static const int32_t CASE_LEVEL = 0x400;
/**
* Options bit 11: Compare secondary weights backwards. ("French secondary")
*/
static const int32_t BACKWARD_SECONDARY = 0x800;
/**
* Options bits 15..12: The 4-bit strength value bit field is shifted by this value.
* It is the top used bit field in the options. (No need to mask after shifting.)
*/
static const int32_t STRENGTH_SHIFT = 12;
/** Strength options bit mask before shifting. */
static const int32_t STRENGTH_MASK = 0xf000;
/** maxVariable values */
enum MaxVariable {
MAX_VAR_SPACE,
MAX_VAR_PUNCT,
MAX_VAR_SYMBOL,
MAX_VAR_CURRENCY
};
CollationSettings()
: options((UCOL_DEFAULT_STRENGTH << STRENGTH_SHIFT) |
(MAX_VAR_PUNCT << MAX_VARIABLE_SHIFT)),
variableTop(0),
reorderTable(NULL),
minHighNoReorder(0),
reorderRanges(NULL), reorderRangesLength(0),
reorderCodes(NULL), reorderCodesLength(0), reorderCodesCapacity(0),
fastLatinOptions(-1) {}
CollationSettings(const CollationSettings &other);
virtual ~CollationSettings();
UBool operator==(const CollationSettings &other) const;
inline UBool operator!=(const CollationSettings &other) const {
return !operator==(other);
}
int32_t hashCode() const;
void resetReordering();
void aliasReordering(const CollationData &data, const int32_t *codes, int32_t length,
const uint32_t *ranges, int32_t rangesLength,
const uint8_t *table, UErrorCode &errorCode);
void setReordering(const CollationData &data, const int32_t *codes, int32_t codesLength,
UErrorCode &errorCode);
void copyReorderingFrom(const CollationSettings &other, UErrorCode &errorCode);
inline UBool hasReordering() const { return reorderTable != NULL; }
static UBool reorderTableHasSplitBytes(const uint8_t table[256]);
inline uint32_t reorder(uint32_t p) const {
uint8_t b = reorderTable[p >> 24];
if(b != 0 || p <= Collation::NO_CE_PRIMARY) {
return ((uint32_t)b << 24) | (p & 0xffffff);
} else {
return reorderEx(p);
}
}
void setStrength(int32_t value, int32_t defaultOptions, UErrorCode &errorCode);
static int32_t getStrength(int32_t options) {
return options >> STRENGTH_SHIFT;
}
int32_t getStrength() const {
return getStrength(options);
}
/** Sets the options bit for an on/off attribute. */
void setFlag(int32_t bit, UColAttributeValue value,
int32_t defaultOptions, UErrorCode &errorCode);
UColAttributeValue getFlag(int32_t bit) const {
return ((options & bit) != 0) ? UCOL_ON : UCOL_OFF;
}
void setCaseFirst(UColAttributeValue value, int32_t defaultOptions, UErrorCode &errorCode);
UColAttributeValue getCaseFirst() const {
int32_t option = options & CASE_FIRST_AND_UPPER_MASK;
return (option == 0) ? UCOL_OFF :
(option == CASE_FIRST) ? UCOL_LOWER_FIRST : UCOL_UPPER_FIRST;
}
void setAlternateHandling(UColAttributeValue value,
int32_t defaultOptions, UErrorCode &errorCode);
UColAttributeValue getAlternateHandling() const {
return ((options & ALTERNATE_MASK) == 0) ? UCOL_NON_IGNORABLE : UCOL_SHIFTED;
}
void setMaxVariable(int32_t value, int32_t defaultOptions, UErrorCode &errorCode);
MaxVariable getMaxVariable() const {
return (MaxVariable)((options & MAX_VARIABLE_MASK) >> MAX_VARIABLE_SHIFT);
}
/**
* Include case bits in the tertiary level if caseLevel=off and caseFirst!=off.
*/
static inline UBool isTertiaryWithCaseBits(int32_t options) {
return (options & (CASE_LEVEL | CASE_FIRST)) == CASE_FIRST;
}
static uint32_t getTertiaryMask(int32_t options) {
// Remove the case bits from the tertiary weight when caseLevel is on or caseFirst is off.
return isTertiaryWithCaseBits(options) ?
Collation::CASE_AND_TERTIARY_MASK : Collation::ONLY_TERTIARY_MASK;
}
static UBool sortsTertiaryUpperCaseFirst(int32_t options) {
// On tertiary level, consider case bits and sort uppercase first
// if caseLevel is off and caseFirst==upperFirst.
return (options & (CASE_LEVEL | CASE_FIRST_AND_UPPER_MASK)) == CASE_FIRST_AND_UPPER_MASK;
}
inline UBool dontCheckFCD() const {
return (options & CHECK_FCD) == 0;
}
inline UBool hasBackwardSecondary() const {
return (options & BACKWARD_SECONDARY) != 0;
}
inline UBool isNumeric() const {
return (options & NUMERIC) != 0;
}
/** CHECK_FCD etc. */
int32_t options;
/** Variable-top primary weight. */
uint32_t variableTop;
/**
* 256-byte table for reordering permutation of primary lead bytes; NULL if no reordering.
* A 0 entry at a non-zero index means that the primary lead byte is "split"
* (there are different offsets for primaries that share that lead byte)
* and the reordering offset must be determined via the reorderRanges.
*/
const uint8_t *reorderTable;
/** Limit of last reordered range. 0 if no reordering or no split bytes. */
uint32_t minHighNoReorder;
/**
* Primary-weight ranges for script reordering,
* to be used by reorder(p) for split-reordered primary lead bytes.
*
* Each entry is a (limit, offset) pair.
* The upper 16 bits of the entry are the upper 16 bits of the
* exclusive primary limit of a range.
* Primaries between the previous limit and this one have their lead bytes
* modified by the signed offset (-0xff..+0xff) stored in the lower 16 bits.
*
* CollationData::makeReorderRanges() writes a full list where the first range
* (at least for terminators and separators) has a 0 offset.
* The last range has a non-zero offset.
* minHighNoReorder is set to the limit of that last range.
*
* In the settings object, the initial ranges before the first split lead byte
* are omitted for efficiency; they are handled by reorder(p) via the reorderTable.
* If there are no split-reordered lead bytes, then no ranges are needed.
*/
const uint32_t *reorderRanges;
int32_t reorderRangesLength;
/** Array of reorder codes; ignored if reorderCodesLength == 0. */
const int32_t *reorderCodes;
/** Number of reorder codes; 0 if no reordering. */
int32_t reorderCodesLength;
/**
* Capacity of reorderCodes.
* If 0, then the codes, the ranges, and the table are aliases.
* Otherwise, this object owns the memory via the reorderCodes pointer;
* the codes, the ranges, and the table are in the same memory block, in that order.
*/
int32_t reorderCodesCapacity;
/** Options for CollationFastLatin. Negative if disabled. */
int32_t fastLatinOptions;
uint16_t fastLatinPrimaries[0x180];
private:
void setReorderArrays(const int32_t *codes, int32_t codesLength,
const uint32_t *ranges, int32_t rangesLength,
const uint8_t *table, UErrorCode &errorCode);
uint32_t reorderEx(uint32_t p) const;
};
U_NAMESPACE_END
#endif // !UCONFIG_NO_COLLATION
#endif // __COLLATIONSETTINGS_H__