src/google/protobuf/unknown_field_set.cc

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  30
  31 // Author: kenton@google.com (Kenton Varda)
  32 //  Based on original Protocol Buffers design by
  33 //  Sanjay Ghemawat, Jeff Dean, and others.
  34
  35 #include <google/protobuf/unknown_field_set.h>
  36
  37 #include <google/protobuf/stubs/common.h>
  38 #include <google/protobuf/io/coded_stream.h>
  39 #include <google/protobuf/io/zero_copy_stream.h>
  40 #include <google/protobuf/io/zero_copy_stream_impl.h>
  41 #include <google/protobuf/wire_format.h>
  42 #include <google/protobuf/stubs/stl_util.h>
  43
  44 namespace google {
  45 namespace protobuf {
  46
  47 UnknownFieldSet::UnknownFieldSet()
  48     : fields_(NULL) {}
  49
  50 UnknownFieldSet::~UnknownFieldSet() {
  51   Clear();
  52   delete fields_;
  53 }
  54
  55 void UnknownFieldSet::ClearFallback() {
  56   GOOGLE_DCHECK(fields_ != NULL);
  57   for (int i = 0; i < fields_->size(); i++) {
  58     (*fields_)[i].Delete();
  59   }
  60   fields_->clear();
  61 }
  62
  63 void UnknownFieldSet::ClearAndFreeMemory() {
  64   if (fields_ != NULL) {
  65     Clear();
  66     delete fields_;
  67     fields_ = NULL;
  68   }
  69 }
  70
  71 void UnknownFieldSet::MergeFrom(const UnknownFieldSet& other) {
  72   for (int i = 0; i < other.field_count(); i++) {
  73     AddField(other.field(i));
  74   }
  75 }
  76
  77 int UnknownFieldSet::SpaceUsedExcludingSelf() const {
  78   if (fields_ == NULL) return 0;
  79
  80   int total_size = sizeof(*fields_) + sizeof(UnknownField) * fields_->size();
  81   for (int i = 0; i < fields_->size(); i++) {
  82     const UnknownField& field = (*fields_)[i];
  83     switch (field.type()) {
  84       case UnknownField::TYPE_LENGTH_DELIMITED:
  85         total_size += sizeof(*field.length_delimited_.string_value_) +
  86                       internal::StringSpaceUsedExcludingSelf(
  87                           *field.length_delimited_.string_value_);
  88         break;
  89       case UnknownField::TYPE_GROUP:
  90         total_size += field.group_->SpaceUsed();
  91         break;
  92       default:
  93         break;
  94     }
  95   }
  96   return total_size;
  97 }
  98
  99 int UnknownFieldSet::SpaceUsed() const {
 100   return sizeof(*this) + SpaceUsedExcludingSelf();
 101 }
 102
 103 void UnknownFieldSet::AddVarint(int number, uint64 value) {
 104   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 105   UnknownField field;
 106   field.number_ = number;
 107   field.SetType(UnknownField::TYPE_VARINT);
 108   field.varint_ = value;
 109   fields_->push_back(field);
 110 }
 111
 112 void UnknownFieldSet::AddFixed32(int number, uint32 value) {
 113   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 114   UnknownField field;
 115   field.number_ = number;
 116   field.SetType(UnknownField::TYPE_FIXED32);
 117   field.fixed32_ = value;
 118   fields_->push_back(field);
 119 }
 120
 121 void UnknownFieldSet::AddFixed64(int number, uint64 value) {
 122   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 123   UnknownField field;
 124   field.number_ = number;
 125   field.SetType(UnknownField::TYPE_FIXED64);
 126   field.fixed64_ = value;
 127   fields_->push_back(field);
 128 }
 129
 130 string* UnknownFieldSet::AddLengthDelimited(int number) {
 131   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 132   UnknownField field;
 133   field.number_ = number;
 134   field.SetType(UnknownField::TYPE_LENGTH_DELIMITED);
 135   field.length_delimited_.string_value_ = new string;
 136   fields_->push_back(field);
 137   return field.length_delimited_.string_value_;
 138 }
 139
 140
 141 UnknownFieldSet* UnknownFieldSet::AddGroup(int number) {
 142   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 143   UnknownField field;
 144   field.number_ = number;
 145   field.SetType(UnknownField::TYPE_GROUP);
 146   field.group_ = new UnknownFieldSet;
 147   fields_->push_back(field);
 148   return field.group_;
 149 }
 150
 151 void UnknownFieldSet::AddField(const UnknownField& field) {
 152   if (fields_ == NULL) fields_ = new vector<UnknownField>;
 153   fields_->push_back(field);
 154   fields_->back().DeepCopy();
 155 }
 156
 157 void UnknownFieldSet::DeleteSubrange(int start, int num) {
 158   GOOGLE_DCHECK(fields_ != NULL);
 159   // Delete the specified fields.
 160   for (int i = 0; i < num; ++i) {
 161     (*fields_)[i + start].Delete();
 162   }
 163   // Slide down the remaining fields.
 164   for (int i = start + num; i < fields_->size(); ++i) {
 165     (*fields_)[i - num] = (*fields_)[i];
 166   }
 167   // Pop off the # of deleted fields.
 168   for (int i = 0; i < num; ++i) {
 169     fields_->pop_back();
 170   }
 171 }
 172
 173 void UnknownFieldSet::DeleteByNumber(int number) {
 174   if (fields_ == NULL) return;
 175   int left = 0;  // The number of fields left after deletion.
 176   for (int i = 0; i < fields_->size(); ++i) {
 177     UnknownField* field = &(*fields_)[i];
 178     if (field->number() == number) {
 179       field->Delete();
 180     } else {
 181       if (i != left) {
 182         (*fields_)[left] = (*fields_)[i];
 183       }
 184       ++left;
 185     }
 186   }
 187   fields_->resize(left);
 188 }
 189
 190 bool UnknownFieldSet::MergeFromCodedStream(io::CodedInputStream* input) {
 191   UnknownFieldSet other;
 192   if (internal::WireFormat::SkipMessage(input, &other) &&
 193       input->ConsumedEntireMessage()) {
 194     MergeFrom(other);
 195     return true;
 196   } else {
 197     return false;
 198   }
 199 }
 200
 201 bool UnknownFieldSet::ParseFromCodedStream(io::CodedInputStream* input) {
 202   Clear();
 203   return MergeFromCodedStream(input);
 204 }
 205
 206 bool UnknownFieldSet::ParseFromZeroCopyStream(io::ZeroCopyInputStream* input) {
 207   io::CodedInputStream coded_input(input);
 208   return (ParseFromCodedStream(&coded_input) &&
 209           coded_input.ConsumedEntireMessage());
 210 }
 211
 212 bool UnknownFieldSet::ParseFromArray(const void* data, int size) {
 213   io::ArrayInputStream input(data, size);
 214   return ParseFromZeroCopyStream(&input);
 215 }
 216
 217 void UnknownField::Delete() {
 218   switch (type()) {
 219     case UnknownField::TYPE_LENGTH_DELIMITED:
 220       delete length_delimited_.string_value_;
 221       break;
 222     case UnknownField::TYPE_GROUP:
 223       delete group_;
 224       break;
 225     default:
 226       break;
 227   }
 228 }
 229
 230 void UnknownField::DeepCopy() {
 231   switch (type()) {
 232     case UnknownField::TYPE_LENGTH_DELIMITED:
 233       length_delimited_.string_value_ = new string(
 234           *length_delimited_.string_value_);
 235       break;
 236     case UnknownField::TYPE_GROUP: {
 237       UnknownFieldSet* group = new UnknownFieldSet;
 238       group->MergeFrom(*group_);
 239       group_ = group;
 240       break;
 241     }
 242     default:
 243       break;
 244   }
 245 }
 246
 247
 248 void UnknownField::SerializeLengthDelimitedNoTag(
 249     io::CodedOutputStream* output) const {
 250   GOOGLE_DCHECK_EQ(TYPE_LENGTH_DELIMITED, type());
 251   const string& data = *length_delimited_.string_value_;
 252   output->WriteVarint32(data.size());
 253   output->WriteRawMaybeAliased(data.data(), data.size());
 254 }
 255
 256 uint8* UnknownField::SerializeLengthDelimitedNoTagToArray(uint8* target) const {
 257   GOOGLE_DCHECK_EQ(TYPE_LENGTH_DELIMITED, type());
 258   const string& data = *length_delimited_.string_value_;
 259   target = io::CodedOutputStream::WriteVarint32ToArray(data.size(), target);
 260   target = io::CodedOutputStream::WriteStringToArray(data, target);
 261   return target;
 262 }
 263
 264 }  // namespace protobuf
 265 }  // namespace google