src/gromacs/utility/inmemoryserializer.cpp

   1 /*
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  35 #include "gmxpre.h"
  36
  37 #include "inmemoryserializer.h"
  38
  39 #include <algorithm>
  40 #include <vector>
  41
  42 #include "gromacs/utility/gmxassert.h"
  43
  44 namespace gmx
  45 {
  46
  47 namespace
  48 {
  49
  50 template <typename T>
  51 class CharBuffer
  52 {
  53     public:
  54         static const size_t ValueSize = sizeof(T);
  55
  56         explicit CharBuffer(T value)
  57         {
  58             u.v = value;
  59         }
  60         explicit CharBuffer(const char buffer[])
  61         {
  62             std::copy(buffer, buffer + ValueSize, u.c);
  63         }
  64
  65         T value() const { return u.v; }
  66
  67         void appendTo(std::vector<char> *buffer)
  68         {
  69             buffer->insert(buffer->end(), u.c, u.c + ValueSize);
  70         }
  71
  72     private:
  73         union {
  74             char c[ValueSize];
  75             T    v;
  76         } u;
  77 };
  78
  79 }   // namespace
  80
  81 /********************************************************************
  82  * InMemorySerializer
  83  */
  84
  85 class InMemorySerializer::Impl
  86 {
  87     public:
  88         template <typename T>
  89         void doValue(T value)
  90         {
  91             CharBuffer<T>(value).appendTo(&buffer_);
  92         }
  93         void doString(const std::string &value)
  94         {
  95             doValue<size_t>(value.size());
  96             buffer_.insert(buffer_.end(), value.begin(), value.end());
  97         }
  98
  99         std::vector<char> buffer_;
 100 };
 101
 102 InMemorySerializer::InMemorySerializer()
 103     : impl_(new Impl)
 104 {
 105 }
 106
 107 InMemorySerializer::~InMemorySerializer()
 108 {
 109 }
 110
 111 std::vector<char> InMemorySerializer::finishAndGetBuffer()
 112 {
 113     return std::move(impl_->buffer_);
 114 }
 115
 116 void InMemorySerializer::doBool(bool *value)
 117 {
 118     impl_->doValue(*value);
 119 }
 120
 121 void InMemorySerializer::doUChar(unsigned char *value)
 122 {
 123     impl_->doValue(*value);
 124 }
 125
 126 void InMemorySerializer::doInt(int *value)
 127 {
 128     impl_->doValue(*value);
 129 }
 130
 131 void InMemorySerializer::doInt64(int64_t *value)
 132 {
 133     impl_->doValue(*value);
 134 }
 135
 136 void InMemorySerializer::doFloat(float *value)
 137 {
 138     impl_->doValue(*value);
 139 }
 140
 141 void InMemorySerializer::doDouble(double *value)
 142 {
 143     impl_->doValue(*value);
 144 }
 145
 146 void InMemorySerializer::doString(std::string *value)
 147 {
 148     impl_->doString(*value);
 149 }
 150
 151 /********************************************************************
 152  * InMemoryDeserializer
 153  */
 154
 155 class InMemoryDeserializer::Impl
 156 {
 157     public:
 158         explicit Impl(const std::vector<char> &buffer)
 159             : buffer_(buffer), pos_(0)
 160         {
 161         }
 162
 163         template <typename T>
 164         void doValue(T *value)
 165         {
 166             *value = CharBuffer<T>(&buffer_[pos_]).value();
 167             pos_  += CharBuffer<T>::ValueSize;
 168         }
 169         void doString(std::string *value)
 170         {
 171             size_t size;
 172             doValue<size_t>(&size);
 173             *value = std::string(&buffer_[pos_], size);
 174             pos_  += size;
 175         }
 176
 177         const std::vector<char> &buffer_;
 178         size_t                   pos_;
 179 };
 180
 181 InMemoryDeserializer::InMemoryDeserializer(const std::vector<char> &buffer)
 182     : impl_(new Impl(buffer))
 183 {
 184 }
 185
 186 InMemoryDeserializer::~InMemoryDeserializer()
 187 {
 188 }
 189
 190 void InMemoryDeserializer::doBool(bool *value)
 191 {
 192     impl_->doValue(value);
 193 }
 194
 195 void InMemoryDeserializer::doUChar(unsigned char *value)
 196 {
 197     impl_->doValue(value);
 198 }
 199
 200 void InMemoryDeserializer::doInt(int *value)
 201 {
 202     impl_->doValue(value);
 203 }
 204
 205 void InMemoryDeserializer::doInt64(int64_t *value)
 206 {
 207     impl_->doValue(value);
 208 }
 209
 210 void InMemoryDeserializer::doFloat(float *value)
 211 {
 212     impl_->doValue(value);
 213 }
 214
 215 void InMemoryDeserializer::doDouble(double *value)
 216 {
 217     impl_->doValue(value);
 218 }
 219
 220 void InMemoryDeserializer::doString(std::string *value)
 221 {
 222     impl_->doString(value);
 223 }
 224
 225 } // namespace gmx