Add support to Pickle for reading and writing floats

base/pickle.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_PICKLE_H__
 #define BASE_PICKLE_H__
 
 #include <string>
 
 #include "base/base_export.h"
@@ skipping 16 matching lines @@
   // the Pickle, create a PickleIterator from a Pickle. If successful, these
   // methods return true. Otherwise, false is returned to indicate that the
   // result could not be extracted.
   bool ReadBool(bool* result) WARN_UNUSED_RESULT;
   bool ReadInt(int* result) WARN_UNUSED_RESULT;
   bool ReadLong(long* result) WARN_UNUSED_RESULT;
   bool ReadUInt16(uint16* result) WARN_UNUSED_RESULT;
   bool ReadUInt32(uint32* result) WARN_UNUSED_RESULT;
   bool ReadInt64(int64* result) WARN_UNUSED_RESULT;
   bool ReadUInt64(uint64* result) WARN_UNUSED_RESULT;
+  bool ReadFloat(float* result) WARN_UNUSED_RESULT;
   bool ReadString(std::string* result) WARN_UNUSED_RESULT;
   bool ReadWString(std::wstring* result) WARN_UNUSED_RESULT;
   bool ReadString16(string16* result) WARN_UNUSED_RESULT;
   bool ReadData(const char** data, int* length) WARN_UNUSED_RESULT;
   bool ReadBytes(const char** data, int length) WARN_UNUSED_RESULT;
 
   // Safer version of ReadInt() checks for the result not being negative.
   // Use it for reading the object sizes.
   bool ReadLength(int* result) WARN_UNUSED_RESULT {
     return ReadInt(result) && *result >= 0;
@@ skipping 104 matching lines @@
   }
   bool ReadUInt32(PickleIterator* iter, uint32* result) const {
     return iter->ReadUInt32(result);
   }
   bool ReadInt64(PickleIterator* iter, int64* result) const {
     return iter->ReadInt64(result);
   }
   bool ReadUInt64(PickleIterator* iter, uint64* result) const {
     return iter->ReadUInt64(result);
   }
+  bool ReadFloat(PickleIterator* iter, float* result) const {
+    return iter->ReadFloat(result);
+  }
   bool ReadString(PickleIterator* iter, std::string* result) const {
     return iter->ReadString(result);
   }
   bool ReadWString(PickleIterator* iter, std::wstring* result) const {
     return iter->ReadWString(result);
   }
   bool ReadString16(PickleIterator* iter, string16* result) const {
     return iter->ReadString16(result);
   }
   // A pointer to the data will be placed in *data, and the length will be
@@ skipping 40 matching lines @@
   }
   bool WriteUInt32(uint32 value) {
     return WriteBytes(&value, sizeof(value));
   }
   bool WriteInt64(int64 value) {
     return WriteBytes(&value, sizeof(value));
   }
   bool WriteUInt64(uint64 value) {
     return WriteBytes(&value, sizeof(value));
   }
+  bool WriteFloat(float value) {
+    return WriteBytes(&value, sizeof(value));
+  }
   bool WriteString(const std::string& value);
   bool WriteWString(const std::wstring& value);
   bool WriteString16(const string16& value);
   // "Data" is a blob with a length. When you read it out you will be given the
   // length. See also WriteBytes.
   bool WriteData(const char* data, int length);
   // "Bytes" is a blob with no length. The caller must specify the lenght both
   // when reading and writing. It is normally used to serialize PoD types of a
   // known size. See also WriteData.
   bool WriteBytes(const void* data, int data_len);
@@ skipping 103 matching lines @@
   // Allocation size of payload (or -1 if allocation is const).
   size_t capacity_;
   size_t variable_buffer_offset_;  // IF non-zero, then offset to a buffer.
 
   FRIEND_TEST_ALL_PREFIXES(PickleTest, Resize);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, FindNext);
   FRIEND_TEST_ALL_PREFIXES(PickleTest, FindNextWithIncompleteHeader);
 };
 
 #endif  // BASE_PICKLE_H__