parser/html/nsHtml5Portability.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsHtml5Portability.h"
   6 #include "jArray.h"
   7 #include "nsAtom.h"
   8 #include "nsHtml5TreeBuilder.h"
   9 #include "nsString.h"
  10 #include "mozilla/CheckedInt.h"
  11
  12 int32_t nsHtml5Portability::checkedAdd(int32_t a, int32_t b) {
  13   mozilla::CheckedInt<int32_t> sum(a);
  14   sum += b;
  15   MOZ_RELEASE_ASSERT(sum.isValid(),
  16                      "HTML input too large for signed 32-bit integer.");
  17   return sum.value();
  18 }
  19
  20 nsAtom* nsHtml5Portability::newLocalNameFromBuffer(char16_t* buf,
  21                                                    int32_t length,
  22                                                    nsHtml5AtomTable* interner) {
  23   NS_ASSERTION(interner, "Didn't get an atom service.");
  24   return interner->GetAtom(nsDependentSubstring(buf, buf + length));
  25 }
  26
  27 nsHtml5String nsHtml5Portability::newStringFromBuffer(
  28     char16_t* buf, int32_t offset, int32_t length,
  29     nsHtml5TreeBuilder* treeBuilder, bool maybeAtomize) {
  30   if (!length) {
  31     return nsHtml5String::EmptyString();
  32   }
  33   if (maybeAtomize) {
  34     return nsHtml5String::FromAtom(
  35         NS_AtomizeMainThread(nsDependentSubstring(buf + offset, length)));
  36   }
  37   return nsHtml5String::FromBuffer(buf + offset, length, treeBuilder);
  38 }
  39
  40 nsHtml5String nsHtml5Portability::newEmptyString() {
  41   return nsHtml5String::EmptyString();
  42 }
  43
  44 nsHtml5String nsHtml5Portability::newStringFromLiteral(const char* literal) {
  45   return nsHtml5String::FromLiteral(literal);
  46 }
  47
  48 nsHtml5String nsHtml5Portability::newStringFromString(nsHtml5String string) {
  49   return string.Clone();
  50 }
  51
  52 jArray<char16_t, int32_t> nsHtml5Portability::newCharArrayFromLocal(
  53     nsAtom* local) {
  54   nsAutoString temp;
  55   local->ToString(temp);
  56   int32_t len = temp.Length();
  57   jArray<char16_t, int32_t> arr = jArray<char16_t, int32_t>::newJArray(len);
  58   memcpy(arr, temp.BeginReading(), len * sizeof(char16_t));
  59   return arr;
  60 }
  61
  62 jArray<char16_t, int32_t> nsHtml5Portability::newCharArrayFromString(
  63     nsHtml5String string) {
  64   MOZ_RELEASE_ASSERT(string);
  65   uint32_t len = string.Length();
  66   MOZ_RELEASE_ASSERT(len < INT32_MAX);
  67   jArray<char16_t, int32_t> arr = jArray<char16_t, int32_t>::newJArray(len);
  68   string.CopyToBuffer(arr);
  69   return arr;
  70 }
  71
  72 bool nsHtml5Portability::localEqualsBuffer(nsAtom* local, char16_t* buf,
  73                                            int32_t length) {
  74   return local->Equals(buf, length);
  75 }
  76
  77 bool nsHtml5Portability::lowerCaseLiteralIsPrefixOfIgnoreAsciiCaseString(
  78     const char* lowerCaseLiteral, nsHtml5String string) {
  79   return string.LowerCaseStartsWithASCII(lowerCaseLiteral);
  80 }
  81
  82 bool nsHtml5Portability::lowerCaseLiteralEqualsIgnoreAsciiCaseString(
  83     const char* lowerCaseLiteral, nsHtml5String string) {
  84   return string.LowerCaseEqualsASCII(lowerCaseLiteral);
  85 }
  86
  87 bool nsHtml5Portability::literalEqualsString(const char* literal,
  88                                              nsHtml5String string) {
  89   return string.EqualsASCII(literal);
  90 }
  91
  92 bool nsHtml5Portability::stringEqualsString(nsHtml5String one,
  93                                             nsHtml5String other) {
  94   return one.Equals(other);
  95 }
  96
  97 void nsHtml5Portability::initializeStatics() {}
  98
  99 void nsHtml5Portability::releaseStatics() {}