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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/FloatingPoint.h"
#include "txXPathResultComparator.h"
#include "txExpr.h"
#include "txCore.h"
#include "nsCollationCID.h"
#include "nsILocale.h"
#include "nsILocaleService.h"
#include "nsIServiceManager.h"
#include "prmem.h"
#define kAscending (1<<0)
#define kUpperFirst (1<<1)
txResultStringComparator::txResultStringComparator(bool aAscending,
bool aUpperFirst,
const nsAFlatString& aLanguage)
{
mSorting = 0;
if (aAscending)
mSorting |= kAscending;
if (aUpperFirst)
mSorting |= kUpperFirst;
nsresult rv = init(aLanguage);
if (NS_FAILED(rv))
NS_ERROR("Failed to initialize txResultStringComparator");
}
nsresult txResultStringComparator::init(const nsAFlatString& aLanguage)
{
nsresult rv;
nsCOMPtr<nsILocaleService> localeService =
do_GetService(NS_LOCALESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILocale> locale;
if (!aLanguage.IsEmpty()) {
rv = localeService->NewLocale(aLanguage,
getter_AddRefs(locale));
}
else {
rv = localeService->GetApplicationLocale(getter_AddRefs(locale));
}
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsICollationFactory> colFactory =
do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = colFactory->CreateCollation(locale, getter_AddRefs(mCollation));
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
txResultStringComparator::createSortableValue(Expr *aExpr,
txIEvalContext *aContext,
txObject *&aResult)
{
nsAutoPtr<StringValue> val(new StringValue);
if (!val) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (!mCollation)
return NS_ERROR_FAILURE;
val->mCaseKey = new nsString;
nsString& nsCaseKey = *(nsString *)val->mCaseKey;
nsresult rv = aExpr->evaluateToString(aContext, nsCaseKey);
NS_ENSURE_SUCCESS(rv, rv);
if (nsCaseKey.IsEmpty()) {
aResult = val.forget();
return NS_OK;
}
rv = mCollation->AllocateRawSortKey(nsICollation::kCollationCaseInSensitive,
nsCaseKey, &val->mKey, &val->mLength);
NS_ENSURE_SUCCESS(rv, rv);
aResult = val.forget();
return NS_OK;
}
int txResultStringComparator::compareValues(txObject* aVal1, txObject* aVal2)
{
StringValue* strval1 = (StringValue*)aVal1;
StringValue* strval2 = (StringValue*)aVal2;
if (!mCollation)
return -1;
if (strval1->mLength == 0) {
if (strval2->mLength == 0)
return 0;
return ((mSorting & kAscending) ? -1 : 1);
}
if (strval2->mLength == 0)
return ((mSorting & kAscending) ? 1 : -1);
nsresult rv;
int32_t result = -1;
rv = mCollation->CompareRawSortKey(strval1->mKey, strval1->mLength,
strval2->mKey, strval2->mLength,
&result);
if (NS_FAILED(rv)) {
// XXX ErrorReport
return -1;
}
if (result != 0)
return ((mSorting & kAscending) ? 1 : -1) * result;
if ((strval1->mCaseLength == 0) && (strval1->mLength != 0)) {
nsString* caseString = (nsString *)strval1->mCaseKey;
rv = mCollation->AllocateRawSortKey(nsICollation::kCollationCaseSensitive,
*caseString,
(uint8_t**)&strval1->mCaseKey,
&strval1->mCaseLength);
if (NS_FAILED(rv)) {
// XXX ErrorReport
strval1->mCaseKey = caseString;
strval1->mCaseLength = 0;
return -1;
}
delete caseString;
}
if ((strval2->mCaseLength == 0) && (strval2->mLength != 0)) {
nsString* caseString = (nsString *)strval2->mCaseKey;
rv = mCollation->AllocateRawSortKey(nsICollation::kCollationCaseSensitive,
*caseString,
(uint8_t**)&strval2->mCaseKey,
&strval2->mCaseLength);
if (NS_FAILED(rv)) {
// XXX ErrorReport
strval2->mCaseKey = caseString;
strval2->mCaseLength = 0;
return -1;
}
delete caseString;
}
rv = mCollation->CompareRawSortKey((uint8_t*)strval1->mCaseKey, strval1->mCaseLength,
(uint8_t*)strval2->mCaseKey, strval2->mCaseLength,
&result);
if (NS_FAILED(rv)) {
// XXX ErrorReport
return -1;
}
return ((mSorting & kAscending) ? 1 : -1) *
((mSorting & kUpperFirst) ? -1 : 1) * result;
}
txResultStringComparator::StringValue::StringValue() : mKey(0),
mCaseKey(0),
mLength(0),
mCaseLength(0)
{
}
txResultStringComparator::StringValue::~StringValue()
{
PR_Free(mKey);
if (mCaseLength > 0)
PR_Free((uint8_t*)mCaseKey);
else
delete (nsString*)mCaseKey;
}
txResultNumberComparator::txResultNumberComparator(bool aAscending)
{
mAscending = aAscending ? 1 : -1;
}
nsresult
txResultNumberComparator::createSortableValue(Expr *aExpr,
txIEvalContext *aContext,
txObject *&aResult)
{
nsAutoPtr<NumberValue> numval(new NumberValue);
if (!numval) {
return NS_ERROR_OUT_OF_MEMORY;
}
RefPtr<txAExprResult> exprRes;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprRes));
NS_ENSURE_SUCCESS(rv, rv);
numval->mVal = exprRes->numberValue();
aResult = numval.forget();
return NS_OK;
}
int txResultNumberComparator::compareValues(txObject* aVal1, txObject* aVal2)
{
double dval1 = ((NumberValue*)aVal1)->mVal;
double dval2 = ((NumberValue*)aVal2)->mVal;
if (mozilla::IsNaN(dval1))
return mozilla::IsNaN(dval2) ? 0 : -mAscending;
if (mozilla::IsNaN(dval2))
return mAscending;
if (dval1 == dval2)
return 0;
return (dval1 < dval2) ? -mAscending : mAscending;
}
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