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# /home/coin/SVN-release/Blis-0.91.0/Alps/src/AlpsEncoded.h

Go to the documentation of this file.

    00001 #ifndef AlpsEncoded_h
    00002 #define AlpsEncoded_h
    00003
    00004 #include <cstring>
    00005 #include <string>
    00006 #include <memory>
    00007 #include <vector>
    00008
    00009 #include "CoinError.hpp"
    00010
    00011 #include "Alps.h"
    00012
    00013 // AlpsEncoded is modified from BCP_buffer and CoinEncoded
    00014
    00015 //#############################################################################
    00023 //#############################################################################
    00024
    00025 class AlpsEncoded {
    00026
    00027  private:
    00028
    00030
    00031     AlpsEncoded(const AlpsEncoded&);
    00032     AlpsEncoded& operator=(const AlpsEncoded&);
    00034
    00035  private:
    00036
    00038     size_t pos_;
    00039
    00041     size_t maxSize_;
    00042
    00047     //std::string type_;
    00048
    00049     int type_;
    00050
    00052     int size_;
    00053
    00055     // const char* representation_;   //why const ??? XY
    00056     char* representation_;
    00057
    00058  public:
    00059
    00062
    00065     AlpsEncoded()
    00066         :
    00067         pos_(0),
    00068         maxSize_(0x4000/*16K*/),
    00069         type_(0),
    00070         size_(0),
    00071         representation_(new char[maxSize_])
    00072         {}
    00073
    00075     AlpsEncoded(int t)
    00076         :
    00077         pos_(0),
    00078         maxSize_(0),
    00079         type_(t),
    00080         size_(0),
    00081         representation_(0)
    00082         {}
    00083
    00085     AlpsEncoded(int t, int s, char*& r)
    00086         :
    00087         pos_(0),
    00088         maxSize_(s + 4),
    00089         type_(t),
    00090         size_(s),
    00091         representation_(r)
    00092         { r = NULL; }
    00093
    00095     ~AlpsEncoded() {
    00096         if (representation_) {
    00097             delete [] representation_;
    00098             representation_ = 0;
    00099         }
    00100     }
    00104
    00105     int type() const { return type_; }
    00106     int size() const { return size_; }
    00107     const char* representation() const { return representation_; }
    00109
    00110     inline void setPosition(const int pos) {
    00111         if (pos < 0 || pos >= size()) {
    00112             //     const char msg [100] = "Incorrest position setting.";
    00113             //throw AlpsException(__FILE__, __LINE__, msg);
    00114             throw CoinError("Incorrest position setting.", "setPosition",
    00115                             "AlpsEncoded");
    00116         }
    00117         pos_ = pos;
    00118     }
    00119
    00120     inline void setRepresentation(char*& buf) {
    00121         //> 0x4000/*16K*/ ? (strlen(buf)+1) : 0x4000;
    00122         maxSize_ = strlen(buf) + 1;
    00123         representation_ = buf;
    00124         buf = 0;
    00125     }
    00126
    00130     inline void make_fit(const int addSize){
    00131         assert(addSize > 0);
    00132         size_t addSize1 = static_cast<size_t>(addSize);
    00133
    00134         if (maxSize_ < size_ + addSize1){
    00135             maxSize_ = 4 * (size_ + addSize1 + 0x1000/*4K*/);
    00136             char* newRep = new char[maxSize_];
    00137             if (size_)
    00138                 memcpy(newRep, representation_, size_);
    00139             delete[] representation_;
    00140             representation_ = newRep;
    00141         }
    00142     }
    00143
    00146     inline void clear(){
    00147         size_ = 0;
    00148         pos_ = 0;
    00149         type_ = 0;
    00150         if (representation_ != 0) {
    00151             delete  representation_;
    00152             representation_ = 0;
    00153         }
    00154     }
    00155
    00156     //------------------------------------------------------
    00157     // Following functiosn are used in parallel code only.
    00158     //------------------------------------------------------
    00159
    00163     template <class T> AlpsEncoded& writeRep(const T& value) {
    00164         make_fit( sizeof(T) );
    00165         memcpy(representation_ + size_, &value, sizeof(T));
    00166         size_ += sizeof(T);
    00167         return *this;
    00168     }
    00169
    00173     template <class T> AlpsEncoded& readRep(T& value){
    00174 #ifdef PARANOID
    00175         if (pos_ + sizeof(T) > size_) {
    00176             throw CoinError("Reading over the end of buffer.",
    00177                             "readRep(const T& value)", "AlpsEncoded");
    00178         }
    00179 #endif
    00180         memcpy(&value, representation_ + pos_, sizeof(T));
    00181         pos_ += sizeof(T);
    00182         return *this;
    00183     }
    00184
    00185
    00189     template <class T> AlpsEncoded& writeRep(const T* const values,
    00190                                              const int length){
    00191         make_fit( sizeof(int) + sizeof(T) * length );
    00192         memcpy(representation_ + size_, &length, sizeof(int));
    00193         size_ += sizeof(int);
    00194         if (length > 0){
    00195             memcpy(representation_ + size_, values, sizeof(T) * length);
    00196             size_ += sizeof(T) * length;
    00197         }
    00198         return *this;
    00199     }
    00200
    00214     template <class T> AlpsEncoded& readRep(T*& values,
    00215                                             int& length,
    00216                                             bool needAllocateMemory = true)
    00217        {
    00218
    00219         if (needAllocateMemory) {
    00220             // Need allocate memeory for arrary "values".
    00221
    00222 #ifdef PARANOID
    00223             if (pos_ + sizeof(int) > size_) {
    00224                 throw CoinError("Reading over the end of buffer.",
    00225                                 "readRep(T*& values, int& length,...",
    00226                                 "AlpsEncoded");
    00227             }
    00228 #endif
    00229             memcpy(&length, representation_ + pos_, sizeof(int));
    00230             pos_ += sizeof(int);
    00231             if (length > 0){
    00232 #ifdef PARANOID
    00233                 if (pos_ + sizeof(T)*length > size_) {
    00234                     throw CoinError("Reading over the end of buffer.",
    00235                                     "readRep(T*& values, int& length,...",
    00236                                     "AlpsEncoded");
    00237                 }
    00238 #endif
    00239                 values = new T[length];
    00240                 memcpy(values, representation_ + pos_, sizeof(T)*length);
    00241                 pos_ += sizeof(T) * length;
    00242             }
    00243
    00244         }
    00245         else { /* values has been allocated memory. */
    00246
    00247             int l;
    00248 #ifdef PARANOID
    00249             if (pos_ + sizeof(int) > size_) {
    00250                 throw CoinError("Reading over the end of buffer.",
    00251                                 "readRep(T*& values, int& length,...",
    00252                                 "AlpsEncoded");
    00253             }
    00254 #endif
    00255             memcpy(&l, representation_ + pos_, sizeof(int));
    00256             pos_ += sizeof(int);
    00257             if (l != length) {
    00258                 throw CoinError("Reading over the end of buffer.",
    00259                                 "readRep(T*& values, int& length,...",
    00260                                 "AlpsEncoded");
    00261             }
    00262             if (length > 0){
    00263 #ifdef PARANOID
    00264                 if (pos_ + sizeof(T)*length > size_) {
    00265                     throw CoinError("Reading over the end of buffer.",
    00266                                     "readRep(T*& values, int& length,...",
    00267                                     "AlpsEncoded");
    00268                 }
    00269 #endif
    00270                 memcpy(values, representation_ + pos_, sizeof(T)*length);
    00271                 pos_ += sizeof(T) * length;
    00272             }
    00273         }
    00274
    00275         return *this;
    00276     }
    00277
    00279     AlpsEncoded& writeRep(std::string& value){
    00280         // must define here, 'cos in *_message.C we have only templated members
    00281         const int len = static_cast<const int> (value.length());
    00282         make_fit( sizeof(int) + len );
    00283         memcpy(representation_ + size_, &len, sizeof(int));
    00284         size_ += sizeof(int);
    00285         if (len > 0){
    00286             memcpy(representation_ + size_, value.c_str(), len);
    00287             size_ += len;
    00288         }
    00289         return *this;
    00290     }
    00291
    00293     AlpsEncoded& readRep(std::string& value){
    00294         int len;
    00295         readRep(len);
    00296         value.assign(representation_ + pos_, len);
    00297         pos_ += len;
    00298         return *this;
    00299     }
    00300
    00302     template <class T> AlpsEncoded& writeRep(const std::vector<T>& vec) {
    00303         int objnum = vec.size();
    00304         int new_bytes = objnum * sizeof(T);
    00305         make_fit( sizeof(int) + new_bytes );
    00306         memcpy(representation_ + size_, &objnum, sizeof(int));
    00307         size_ += sizeof(int);
    00308         if (objnum > 0){
    00309             memcpy(representation_ + size_, &vec[0], new_bytes);
    00310             size_ += new_bytes;
    00311         }
    00312         return *this;
    00313    }
    00314
    00316    template <class T> AlpsEncoded& readRep(std::vector<T>& vec) {
    00317        int objnum;
    00318 #ifdef PARANOID
    00319        if (pos_ + sizeof(int) > size_)
    00320            throw CoinError("Reading over the end of buffer.",
    00321                            "AlpsEncoded", "readRep(std::vector<T>& vec");
    00322 #endif
    00323        memcpy(&objnum, representation_ + pos_, sizeof(int));
    00324        pos_ += sizeof(int);
    00325        vec.clear();
    00326        if (objnum > 0){
    00327 #ifdef PARANOID
    00328            if (pos_ + sizeof(T)*objnum > size_)
    00329                throw CoinError("Reading over the end of buffer.",
    00330                                "AlpsEncoded", "readRep(std::vector<T>& vec");
    00331 #endif
    00332            vec.insert(vec.end(), objnum, T());
    00333            memcpy(&vec[0], representation_ + pos_, objnum * sizeof(T));
    00334            pos_ += objnum * sizeof(T);
    00335        }
    00336        return *this;
    00337    }
    00340 };
    00341
    00342 #endif