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ICU-2412 some comments added

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X-SVN-Rev: 11256
This commit is contained in:
Vladimir Weinstein 2003-03-07 07:00:53 +00:00
parent 8c8a6bbe08
commit 8b24f520fc
1 changed files with 38 additions and 29 deletions
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67
icu4c/source/i18n/ucol.cpp
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@ -5035,35 +5035,6 @@ ucol_calcSortKeySimpleTertiary(const UCollator *coll,
return sortKeySize;
}
enum {
UCOL_PSK_PRIMARY = 0,
UCOL_PSK_SECONDARY = 1,
UCOL_PSK_CASE = 2,
UCOL_PSK_TERTIARY = 3,
UCOL_PSK_QUATERNARY = 4,
UCOL_PSK_QUIN = 5,
UCOL_PSK_IDENTICAL = 6,
UCOL_PSK_NULL = 7,
UCOL_PSK_LIMIT
};
enum {
UCOL_PSK_LEVEL_SHIFT = 0,
UCOL_PSK_LEVEL_MASK = 7,
UCOL_PSK_BYTE_COUNT_SHIFT = 3,
UCOL_PSK_BYTE_COUNT_MASK = 1,
UCOL_PSK_WAS_SHIFTED_SHIFT = 4,
UCOL_PSK_WAS_SHIFTED_MASK = 1,
UCOL_PSK_USED_FRENCH_SHIFT = 5,
UCOL_PSK_USED_FRENCH_MASK = 3,
UCOL_PSK_USED_ELEMENTS_SHIFT = 7,
UCOL_PSK_USED_ELEMENTS_MASK = 0x3FF,
UCOL_PSK_ITER_SKIP_SHIFT = 17,
UCOL_PSK_ITER_SKIP_MASK = 0x7FFF
};
static inline
UBool isShiftedCE(uint32_t CE, uint32_t LVT, UBool *wasShifted) {
UBool notIsContinuation = !isContinuation(CE);
@ -5085,6 +5056,44 @@ UBool isShiftedCE(uint32_t CE, uint32_t LVT, UBool *wasShifted) {
}
}
/** enumeration of level identifiers for partial sort key generation */
enum {
UCOL_PSK_PRIMARY = 0,
UCOL_PSK_SECONDARY = 1,
UCOL_PSK_CASE = 2,
UCOL_PSK_TERTIARY = 3,
UCOL_PSK_QUATERNARY = 4,
UCOL_PSK_QUIN = 5, /** This is an extra level, not used - but we have three bits to blow */
UCOL_PSK_IDENTICAL = 6,
UCOL_PSK_NULL = 7, /** level for the end of sort key. Will just produce zeros */
UCOL_PSK_LIMIT
};
/** collation state enum. *_SHIFT value is how much to shift right
* to get the state piece to the right. *_MASK value should be
* ANDed with the shifted state. This data is stored in state[1]
* field.
*/
enum {
UCOL_PSK_LEVEL_SHIFT = 0, /** level identificator. stores an enum value from above */
UCOL_PSK_LEVEL_MASK = 7, /** three bits */
UCOL_PSK_BYTE_COUNT_SHIFT = 3, /** number of bytes of primary already written */
UCOL_PSK_BYTE_COUNT_MASK = 1, /** can be only 0 or 1, since we get up to two bytes from primary */
UCOL_PSK_WAS_SHIFTED_SHIFT = 4,/** was the last value shifted */
UCOL_PSK_WAS_SHIFTED_MASK = 1, /** can be 0 or 1 (Boolean) */
UCOL_PSK_USED_FRENCH_SHIFT = 5,/** how many French bytes have we already written */
UCOL_PSK_USED_FRENCH_MASK = 3, /** up to 4 bytes. See comment just below */
/** When we do French we need to reverse secondary values. However, continuations
* need to stay the same. So if you had abc1c2c3de, you need to have edc1c2c3ba
*/
UCOL_PSK_USED_ELEMENTS_SHIFT = 7,
UCOL_PSK_USED_ELEMENTS_MASK = 0x3FF,
UCOL_PSK_ITER_SKIP_SHIFT = 17,
UCOL_PSK_ITER_SKIP_MASK = 0x7FFF
};
/** main sortkey part procedure */
U_CAPI int32_t U_EXPORT2
ucol_nextSortKeyPart(UCollator *coll,
UCharIterator *iter,