DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (4a108e94d3e2)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsCollation.h"
#include "nsCollationCID.h"
#include "nsUnicharUtils.h"
#include "prmem.h"
#include "nsIUnicodeEncoder.h"
#include "nsServiceManagerUtils.h"
#include "mozilla/dom/EncodingUtils.h"

using mozilla::dom::EncodingUtils;

////////////////////////////////////////////////////////////////////////////////

NS_DEFINE_CID(kCollationCID, NS_COLLATION_CID);

NS_IMPL_ISUPPORTS(nsCollationFactory, nsICollationFactory)

nsresult nsCollationFactory::CreateCollation(nsILocale* locale, nsICollation** instancePtr)
{
  // Create a collation interface instance.
  //
  nsICollation *inst;
  nsresult res;
  
  res = CallCreateInstance(kCollationCID, &inst);
  if (NS_FAILED(res)) {
    return res;
  }

  inst->Initialize(locale);
  *instancePtr = inst;

  return res;
}

////////////////////////////////////////////////////////////////////////////////

nsCollation::nsCollation()
{
  MOZ_COUNT_CTOR(nsCollation);
}

nsCollation::~nsCollation()
{
  MOZ_COUNT_DTOR(nsCollation);
}

nsresult nsCollation::NormalizeString(const nsAString& stringIn, nsAString& stringOut)
{
  int32_t aLength = stringIn.Length();

  if (aLength <= 64) {
    char16_t conversionBuffer[64];
    ToLowerCase(PromiseFlatString(stringIn).get(), conversionBuffer, aLength);
    stringOut.Assign(conversionBuffer, aLength);
  }
  else {
    char16_t* conversionBuffer;
    conversionBuffer = new char16_t[aLength];
    if (!conversionBuffer) {
      return NS_ERROR_OUT_OF_MEMORY;
    }
    ToLowerCase(PromiseFlatString(stringIn).get(), conversionBuffer, aLength);
    stringOut.Assign(conversionBuffer, aLength);
    delete [] conversionBuffer;
  }
  return NS_OK;
}

nsresult nsCollation::SetCharset(const char* aCharset)
{
  NS_ENSURE_ARG_POINTER(aCharset);

  nsDependentCString label(aCharset);
  nsAutoCString encoding;
  if (!EncodingUtils::FindEncodingForLabelNoReplacement(label, encoding)) {
      return NS_ERROR_UCONV_NOCONV;
  }
  mEncoder = EncodingUtils::EncoderForEncoding(encoding);
  return NS_OK;
}

nsresult nsCollation::UnicodeToChar(const nsAString& aSrc, char** dst)
{
  NS_ENSURE_ARG_POINTER(dst);

  nsresult res = NS_OK;
  if (!mEncoder)
    res = SetCharset("ISO-8859-1");

  if (NS_SUCCEEDED(res)) {
    const nsPromiseFlatString& src = PromiseFlatString(aSrc);
    const char16_t *unichars = src.get();
    int32_t unicharLength = src.Length();
    int32_t dstLength;
    res = mEncoder->GetMaxLength(unichars, unicharLength, &dstLength);
    if (NS_SUCCEEDED(res)) {
      int32_t bufLength = dstLength + 1 + 32; // extra 32 bytes for Finish() call
      *dst = (char *) PR_Malloc(bufLength);
      if (*dst) {
        **dst = '\0';
        res = mEncoder->Convert(unichars, &unicharLength, *dst, &dstLength);

        if (NS_SUCCEEDED(res) || (NS_ERROR_UENC_NOMAPPING == res)) {
          // Finishes the conversion. The converter has the possibility to write some 
          // extra data and flush its final state.
          int32_t finishLength = bufLength - dstLength; // remaining unused buffer length
          if (finishLength > 0) {
            res = mEncoder->Finish((*dst + dstLength), &finishLength);
            if (NS_SUCCEEDED(res)) {
              (*dst)[dstLength + finishLength] = '\0';
            }
          }
        }
        if (NS_FAILED(res)) {
          PR_Free(*dst);
          *dst = nullptr;
        }
      }
      else {
        res = NS_ERROR_OUT_OF_MEMORY;
      }
    }
  }

  return res;
}