# gdcmString.h

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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004   Module:  $URL$
    00005
    00006   Copyright (c) 2006-2010 Mathieu Malaterre
    00007   All rights reserved.
    00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00009
    00010      This software is distributed WITHOUT ANY WARRANTY; without even
    00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00012      PURPOSE.  See the above copyright notice for more information.
    00013
    00014 =========================================================================*/
    00015 #ifndef GDCMSTRING_H
    00016 #define GDCMSTRING_H
    00017
    00018 #include "gdcmTypes.h"
    00019 #include "gdcmStaticAssert.h"
    00020
    00021 namespace gdcm
    00022 {
    00023
    00031 template <char TDelimiter = '\\', unsigned int TMaxLength = 64, char TPadChar = ' '>
    00032 class /*GDCM_EXPORT*/ String : public std::string /* PLEASE do not export me */
    00033 {
    00034   // UI wants \0 for pad character, while ASCII ones wants space char... do not allow anything else
    00035   GDCM_STATIC_ASSERT( TPadChar == ' ' || TPadChar == 0 );
    00036
    00037 public:
    00038   // typedef are not inherited:
    00039   typedef std::string::value_type             value_type;
    00040   typedef std::string::pointer                pointer;
    00041   typedef std::string::reference              reference;
    00042   typedef std::string::const_reference        const_reference;
    00043   typedef std::string::size_type              size_type;
    00044   typedef std::string::difference_type        difference_type;
    00045   typedef std::string::iterator               iterator;
    00046   typedef std::string::const_iterator         const_iterator;
    00047   typedef std::string::reverse_iterator       reverse_iterator;
    00048   typedef std::string::const_reverse_iterator const_reverse_iterator;
    00049
    00051   String(): std::string() {}
    00052   String(const value_type* s): std::string(s)
    00053   {
    00054   if( size() % 2 )
    00055     {
    00056     push_back( TPadChar );
    00057     }
    00058   }
    00059   String(const value_type* s, size_type n): std::string(s, n)
    00060   {
    00061   // We are being passed a const char* pointer, so s[n] == 0 (garanteed!)
    00062   if( n % 2 )
    00063     {
    00064     push_back( TPadChar );
    00065     }
    00066   }
    00067   String(const std::string& s, size_type pos=0, size_type n=npos):
    00068     std::string(s, pos, n)
    00069   {
    00070   // FIXME: some users might already have padded the string 's' with a trailing \0...
    00071   if( size() % 2 )
    00072     {
    00073     push_back( TPadChar );
    00074     }
    00075   }
    00076
    00078   operator const char *() { return this->c_str(); }
    00079
    00081   bool IsValid() const {
    00082     // Check Length:
    00083     size_type l = size();
    00084     if( l > TMaxLength ) return false;
    00085     return true;
    00086   }
    00087
    00088   gdcm::String<TDelimiter, TMaxLength, TPadChar> Truncate() const {
    00089     if( IsValid() ) return *this;
    00090     std::string str = *this; // copy
    00091     str.resize( TMaxLength );
    00092     return str;
    00093   }
    00094
    00097   std::string Trim() const {
    00098     std::string str = *this; // copy
    00099     std::string::size_type pos1 = str.find_first_not_of(' ');
    00100     std::string::size_type pos2 = str.find_last_not_of(' ');
    00101     str = str.substr( (pos1 == std::string::npos) ? 0 : pos1,
    00102       (pos2 == std::string::npos) ? (str.size() - 1) : (pos2 - pos1 + 1));
    00103     return str;
    00104   }
    00105
    00106 };
    00107 template <char TDelimiter, unsigned int TMaxLength, char TPadChar>
    00108 inline std::istream& operator>>(std::istream &is, String<TDelimiter,TMaxLength,TPadChar> &ms)
    00109 {
    00110   if(is)
    00111     {
    00112     std::getline(is, ms, TDelimiter);
    00113     // no such thing as std::get where the delim char would be left, so I need to manually add it back...
    00114     // hopefully this is the right thing to do (no overhead)
    00115     is.putback( TDelimiter );
    00116     }
    00117   return is;
    00118 }
    00119 //template <char TDelimiter = EOF, unsigned int TMaxLength = 64, char TPadChar = ' '>
    00120 //String String::Trim() const
    00121 //{
    00122 //  String s;
    00123 //  return s;
    00124 //}
    00125
    00126 } // end namespace gdcm
    00127
    00128 #endif //GDCMSTRING_H
    00129