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/*
******************************************************************************
* Copyright (C) 2001-2006, International Business Machines
* Corporation and others. All Rights Reserved.
******************************************************************************
*
* File ucoleitr.cpp
*
* Modification History:
*
* Date Name Description
* 02/15/2001 synwee Modified all methods to process its own function
* instead of calling the equivalent c++ api (coleitr.h)
******************************************************************************/
#include "unicode/utypes.h"
#if !UCONFIG_NO_COLLATION
#include "unicode/ucoleitr.h"
#include "unicode/ustring.h"
#include "unicode/sortkey.h"
#include "ucol_imp.h"
#include "cmemory.h"
U_NAMESPACE_USE
#define BUFFER_LENGTH 100
typedef struct collIterate collIterator;
/* public methods ---------------------------------------------------- */
U_CAPI UCollationElements* U_EXPORT2
ucol_openElements(const UCollator *coll,
const UChar *text,
int32_t textLength,
UErrorCode *status)
{
UCollationElements *result;
if (U_FAILURE(*status)) {
return NULL;
}
result = (UCollationElements *)uprv_malloc(sizeof(UCollationElements));
/* test for NULL */
if (result == NULL) {
*status = U_MEMORY_ALLOCATION_ERROR;
return NULL;
}
result->reset_ = TRUE;
result->isWritable = FALSE;
if (text == NULL) {
textLength = 0;
}
uprv_init_collIterate(coll, text, textLength, &result->iteratordata_);
return result;
}
U_CAPI void U_EXPORT2
ucol_closeElements(UCollationElements *elems)
{
collIterate *ci = &elems->iteratordata_;
if (ci->writableBuffer != ci->stackWritableBuffer) {
uprv_free(ci->writableBuffer);
}
if (elems->isWritable && elems->iteratordata_.string != NULL)
{
uprv_free(elems->iteratordata_.string);
}
uprv_free(elems);
}
U_CAPI void U_EXPORT2
ucol_reset(UCollationElements *elems)
{
collIterate *ci = &(elems->iteratordata_);
elems->reset_ = TRUE;
ci->pos = ci->string;
if ((ci->flags & UCOL_ITER_HASLEN) == 0 || ci->endp == NULL) {
ci->endp = ci->string + u_strlen(ci->string);
}
ci->CEpos = ci->toReturn = ci->CEs;
ci->flags = UCOL_ITER_HASLEN;
if (ci->coll->normalizationMode == UCOL_ON) {
ci->flags |= UCOL_ITER_NORM;
}
if (ci->stackWritableBuffer != ci->writableBuffer) {
uprv_free(ci->writableBuffer);
ci->writableBuffer = ci->stackWritableBuffer;
ci->writableBufSize = UCOL_WRITABLE_BUFFER_SIZE;
}
ci->fcdPosition = NULL;
}
U_CAPI int32_t U_EXPORT2
ucol_next(UCollationElements *elems,
UErrorCode *status)
{
int32_t result;
if (U_FAILURE(*status)) {
return UCOL_NULLORDER;
}
elems->reset_ = FALSE;
result = (int32_t)ucol_getNextCE(elems->iteratordata_.coll,
&elems->iteratordata_,
status);
if (result == UCOL_NO_MORE_CES) {
result = UCOL_NULLORDER;
}
return result;
}
U_CAPI int32_t U_EXPORT2
ucol_previous(UCollationElements *elems,
UErrorCode *status)
{
if(U_FAILURE(*status)) {
return UCOL_NULLORDER;
}
else
{
int32_t result;
if (elems->reset_ &&
(elems->iteratordata_.pos == elems->iteratordata_.string)) {
if (elems->iteratordata_.endp == NULL) {
elems->iteratordata_.endp = elems->iteratordata_.string +
u_strlen(elems->iteratordata_.string);
elems->iteratordata_.flags |= UCOL_ITER_HASLEN;
}
elems->iteratordata_.pos = elems->iteratordata_.endp;
elems->iteratordata_.fcdPosition = elems->iteratordata_.endp;
}
elems->reset_ = FALSE;
result = (int32_t)ucol_getPrevCE(elems->iteratordata_.coll,
&(elems->iteratordata_),
status);
if (result == UCOL_NO_MORE_CES) {
result = UCOL_NULLORDER;
}
return result;
}
}
U_CAPI int32_t U_EXPORT2
ucol_getMaxExpansion(const UCollationElements *elems,
int32_t order)
{
uint8_t result;
UCOL_GETMAXEXPANSION(elems->iteratordata_.coll, (uint32_t)order, result);
return result;
}
U_CAPI void U_EXPORT2
ucol_setText( UCollationElements *elems,
const UChar *text,
int32_t textLength,
UErrorCode *status)
{
if (U_FAILURE(*status)) {
return;
}
if (elems->isWritable && elems->iteratordata_.string != NULL)
{
uprv_free(elems->iteratordata_.string);
}
if (text == NULL) {
textLength = 0;
}
elems->isWritable = FALSE;
uprv_init_collIterate(elems->iteratordata_.coll, text, textLength,
&elems->iteratordata_);
elems->reset_ = TRUE;
}
U_CAPI int32_t U_EXPORT2
ucol_getOffset(const UCollationElements *elems)
{
const collIterate *ci = &(elems->iteratordata_);
// while processing characters in normalization buffer getOffset will
// return the next non-normalized character.
// should be inline with the old implementation since the old codes uses
// nextDecomp in normalizer which also decomposes the string till the
// first base character is found.
if (ci->flags & UCOL_ITER_INNORMBUF) {
if (ci->fcdPosition == NULL) {
return 0;
}
return (int32_t)(ci->fcdPosition - ci->string);
}
else {
return (int32_t)(ci->pos - ci->string);
}
}
U_CAPI void U_EXPORT2
ucol_setOffset(UCollationElements *elems,
int32_t offset,
UErrorCode *status)
{
if (U_FAILURE(*status)) {
return;
}
// this methods will clean up any use of the writable buffer and points to
// the original string
collIterate *ci = &(elems->iteratordata_);
ci->pos = ci->string + offset;
ci->CEpos = ci->toReturn = ci->CEs;
if (ci->flags & UCOL_ITER_INNORMBUF) {
ci->flags = ci->origFlags;
}
if ((ci->flags & UCOL_ITER_HASLEN) == 0) {
ci->endp = ci->string + u_strlen(ci->string);
ci->flags |= UCOL_ITER_HASLEN;
}
ci->fcdPosition = NULL;
elems->reset_ = FALSE;
}
U_CAPI int32_t U_EXPORT2
ucol_primaryOrder (int32_t order)
{
order &= UCOL_PRIMARYMASK;
return (order >> UCOL_PRIMARYORDERSHIFT);
}
U_CAPI int32_t U_EXPORT2
ucol_secondaryOrder (int32_t order)
{
order &= UCOL_SECONDARYMASK;
return (order >> UCOL_SECONDARYORDERSHIFT);
}
U_CAPI int32_t U_EXPORT2
ucol_tertiaryOrder (int32_t order)
{
return (order & UCOL_TERTIARYMASK);
}
#endif /* #if !UCONFIG_NO_COLLATION */
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