gecko-dev/intl/locale/nsUConvPropertySearch.cpp
Nicholas Nethercote c8c2a2bc4d Bug 1262324 (part 2) - Introduce nsUConvProp. r=emk.
This patch fixes the hack of using a trio of |const char*| pointers to
represent a property that has two strings and a length.

--HG--
extra : rebase_source : 9f603b768146a78baf9fa2b4096cccfae9f87322
2016-04-06 13:31:38 +10:00

45 lines
1.3 KiB
C++

/* 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 "nsUConvPropertySearch.h"
#include "nsCRT.h"
#include "nsString.h"
#include "mozilla/BinarySearch.h"
namespace {
struct PropertyComparator
{
const nsCString& mKey;
explicit PropertyComparator(const nsCString& aKey) : mKey(aKey) {}
int operator()(const nsUConvProp& aProperty) const {
return mKey.Compare(aProperty.mKey);
}
};
} // namespace
// static
nsresult
nsUConvPropertySearch::SearchPropertyValue(const nsUConvProp aProperties[],
int32_t aNumberOfProperties,
const nsACString& aKey,
nsACString& aValue)
{
using mozilla::BinarySearchIf;
const nsCString& flat = PromiseFlatCString(aKey);
size_t index;
if (BinarySearchIf(aProperties, 0, aNumberOfProperties,
PropertyComparator(flat), &index)) {
nsDependentCString val(aProperties[index].mValue,
aProperties[index].mValueLength);
aValue.Assign(val);
return NS_OK;
}
aValue.Truncate();
return NS_ERROR_FAILURE;
}