nsUConvPropertySearch.cpp

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/* 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 Compare(mKey, nsDependentCString(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;