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 (d1ac49b9eb3e)

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
/* 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 "nsHtml5String.h"
#include "nsCharTraits.h"
#include "nsHtml5TreeBuilder.h"
#include "nsUTF8Utils.h"

void nsHtml5String::ToString(nsAString& aString) {
  switch (GetKind()) {
    case eStringBuffer:
      return AsStringBuffer()->ToString(Length(), aString);
    case eAtom:
      return AsAtom()->ToString(aString);
    case eEmpty:
      aString.Truncate();
      return;
    default:
      aString.Truncate();
      aString.SetIsVoid(true);
      return;
  }
}

void nsHtml5String::CopyToBuffer(char16_t* aBuffer) const {
  memcpy(aBuffer, AsPtr(), Length() * sizeof(char16_t));
}

bool nsHtml5String::LowerCaseEqualsASCII(const char* aLowerCaseLiteral) const {
  return !nsCharTraits<char16_t>::compareLowerCaseToASCIINullTerminated(
      AsPtr(), Length(), aLowerCaseLiteral);
}

bool nsHtml5String::EqualsASCII(const char* aLiteral) const {
  return !nsCharTraits<char16_t>::compareASCIINullTerminated(AsPtr(), Length(),
                                                             aLiteral);
}

bool nsHtml5String::LowerCaseStartsWithASCII(
    const char* aLowerCaseLiteral) const {
  const char* litPtr = aLowerCaseLiteral;
  const char16_t* strPtr = AsPtr();
  const char16_t* end = strPtr + Length();
  char16_t litChar;
  while ((litChar = *litPtr)) {
    MOZ_ASSERT(!(litChar >= 'A' && litChar <= 'Z'),
               "Literal isn't in lower case.");
    if (strPtr == end) {
      return false;
    }
    char16_t strChar = *strPtr;
    if (strChar >= 'A' && strChar <= 'Z') {
      strChar += 0x20;
    }
    if (litChar != strChar) {
      return false;
    }
    ++litPtr;
    ++strPtr;
  }
  return true;
}

bool nsHtml5String::Equals(nsHtml5String aOther) const {
  MOZ_ASSERT(operator bool());
  MOZ_ASSERT(aOther);
  if (Length() != aOther.Length()) {
    return false;
  }
  return !memcmp(AsPtr(), aOther.AsPtr(), Length() * sizeof(char16_t));
}

nsHtml5String nsHtml5String::Clone() {
  switch (GetKind()) {
    case eStringBuffer:
      AsStringBuffer()->AddRef();
      break;
    case eAtom:
      AsAtom()->AddRef();
      break;
    default:
      break;
  }
  return nsHtml5String(mBits);
}

void nsHtml5String::Release() {
  switch (GetKind()) {
    case eStringBuffer:
      AsStringBuffer()->Release();
      break;
    case eAtom:
      AsAtom()->Release();
      break;
    default:
      break;
  }
  mBits = eNull;
}

// static
nsHtml5String nsHtml5String::FromBuffer(char16_t* aBuffer, int32_t aLength,
                                        nsHtml5TreeBuilder* aTreeBuilder) {
  if (!aLength) {
    return nsHtml5String(eEmpty);
  }
  // Work with nsStringBuffer directly to make sure that storage is actually
  // nsStringBuffer and to make sure the allocation strategy matches
  // nsAttrValue::GetStringBuffer, so that it doesn't need to reallocate and
  // copy.
  RefPtr<nsStringBuffer> buffer(
      nsStringBuffer::Alloc((aLength + 1) * sizeof(char16_t)));
  if (!buffer) {
    if (!aTreeBuilder) {
      MOZ_CRASH("Out of memory.");
    }
    aTreeBuilder->MarkAsBroken(NS_ERROR_OUT_OF_MEMORY);
    buffer = nsStringBuffer::Alloc(2 * sizeof(char16_t));
    if (!buffer) {
      MOZ_CRASH(
          "Out of memory so badly that couldn't even allocate placeholder.");
    }
    char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
    data[0] = 0xFFFD;
    data[1] = 0;
    return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
                         eStringBuffer);
  }
  char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
  memcpy(data, aBuffer, aLength * sizeof(char16_t));
  data[aLength] = 0;
  return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
                       eStringBuffer);
}

// static
nsHtml5String nsHtml5String::FromLiteral(const char* aLiteral) {
  size_t length = std::strlen(aLiteral);
  if (!length) {
    return nsHtml5String(eEmpty);
  }
  // Work with nsStringBuffer directly to make sure that storage is actually
  // nsStringBuffer and to make sure the allocation strategy matches
  // nsAttrValue::GetStringBuffer, so that it doesn't need to reallocate and
  // copy.
  RefPtr<nsStringBuffer> buffer(
      nsStringBuffer::Alloc((length + 1) * sizeof(char16_t)));
  if (!buffer) {
    MOZ_CRASH("Out of memory.");
  }
  char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
  ConvertAsciitoUtf16(MakeSpan(aLiteral, length), MakeSpan(data, length));
  data[length] = 0;
  return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
                       eStringBuffer);
}

// static
nsHtml5String nsHtml5String::FromString(const nsAString& aString) {
  auto length = aString.Length();
  if (!length) {
    return nsHtml5String(eEmpty);
  }
  RefPtr<nsStringBuffer> buffer = nsStringBuffer::FromString(aString);
  if (buffer && (length == buffer->StorageSize() / sizeof(char16_t) - 1)) {
    return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
                         eStringBuffer);
  }
  buffer = nsStringBuffer::Alloc((length + 1) * sizeof(char16_t));
  if (!buffer) {
    MOZ_CRASH("Out of memory.");
  }
  char16_t* data = reinterpret_cast<char16_t*>(buffer->Data());
  memcpy(data, aString.BeginReading(), length * sizeof(char16_t));
  data[length] = 0;
  return nsHtml5String(reinterpret_cast<uintptr_t>(buffer.forget().take()) |
                       eStringBuffer);
}

// static
nsHtml5String nsHtml5String::FromAtom(already_AddRefed<nsAtom> aAtom) {
  return nsHtml5String(reinterpret_cast<uintptr_t>(aAtom.take()) | eAtom);
}

// static
nsHtml5String nsHtml5String::EmptyString() { return nsHtml5String(eEmpty); }