/*=========================================================================

  Program: GDCM (Grassroots DICOM). A DICOM library

  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#include "gdcmByteValue.h"

#include <algorithm> // req C++11
#include <cstring> // memcpy

namespace gdcm_ns
{

  void ByteValue::SetLength(VL vl) {
    VL l(vl);
#ifdef GDCM_SUPPORT_BROKEN_IMPLEMENTATION
    // CompressedLossy.dcm
    if( l.IsUndefined() ) throw Exception( "Impossible" );
    if ( l.IsOdd() ) {
      gdcmDebugMacro(
        "BUGGY HEADER: Your dicom contain odd length value field." );
      ++l;
      }
#else
    gdcmAssertAlwaysMacro( !l.IsUndefined() && !l.IsOdd() );
#endif
    // I cannot use reserve for now. I need to implement:
    // STL - vector<> and istream
    // http://groups.google.com/group/comp.lang.c++/msg/37ec052ed8283e74
//#define SHORT_READ_HACK
    try
      {
#ifdef SHORT_READ_HACK
    if( l <= 0xff )
#endif
      Internal.resize(l);
      //Internal.reserve(l);
      }
    catch(...)
      {
      //throw Exception("Impossible to allocate: " << l << " bytes." );
      throw Exception("Impossible to allocate" );
      }
    // Keep the exact length
    Length = vl;
  }
  void ByteValue::PrintASCII(std::ostream &os, VL maxlength ) const {
    VL length = std::min(maxlength, Length);
    // Special case for VR::UI, do not print the trailing \0
    if( length && length == Length )
      {
      if( Internal[length-1] == 0 )
        {
        length = length - 1;
        }
      }
    // I cannot check IsPrintable some file contains \2 or \0 in a VR::LO element
    // See: acr_image_with_non_printable_in_0051_1010.acr
    //assert( IsPrintable(length) );
    std::vector<char>::const_iterator it = Internal.begin();
    for(; it != Internal.begin()+length; ++it)
      {
      const char &c = *it;
      if ( !( isprint((unsigned char)c) || isspace((unsigned char)c) ) ) os << ".";
      else os << c;
      }
  }
  void ByteValue::PrintHex(std::ostream &os, VL maxlength ) const {
    VL length = std::min(maxlength, Length);
    // WARNING: Internal.end() != Internal.begin()+Length
    std::vector<char>::const_iterator it = Internal.begin();
    os << std::hex;
    for(; it != Internal.begin()+length; ++it)
      {
      //const char &c = *it;
      uint8_t v = *it;
      if( it != Internal.begin() ) os << "\\";
      os << std::setw( 2 ) << std::setfill( '0' ) << (uint16_t)v;
      //++it;
      //os << std::setw( 1 ) << std::setfill( '0' ) << (int)*it;
      }
    os << std::dec;
  }

  bool ByteValue::GetBuffer(char *buffer, unsigned long length) const {
    // SIEMENS_GBS_III-16-ACR_NEMA_1.acr has a weird pixel length
    // so we need an inequality
    if( length <= Internal.size() )
      {
      if(!Internal.empty()) memcpy(buffer, &Internal[0], length);
      return true;
      }
    gdcmDebugMacro( "Could not handle length= " << length );
    return false;
    }

  void ByteValue::PrintPNXML(std::ostream &os) const
    {
    /*
    PersonName = element PersonName {
    Number,
    element SingleByte { NameComponents }?,
    element Ideographic { NameComponents }?,
    element Phonetic { NameComponents }?
    }

    NameComponents =
    element FamilyName {xsd:string}?,
    element GivenName {xsd:string}?,
    element MiddleName {xsd:string}?,
    element NamePrefix {xsd:string}?,
    element NameSuffix {xsd:string}?
     */
    int count1 , count2;
    count1=count2=1;
    os << "<PersonName number = \"" << count1 << "\" >\n" ;
    os << "<SingleByte>\n<FamilyName> " ;
    std::vector<char>::const_iterator it = Internal.begin();
    for(; it != (Internal.begin() + Length); ++it)
      {
      const char &c = *it;
      if ( c == '^' )
        {
        if(count2==1)
          {
          os << "</FamilyName>\n";
          os << "<GivenName> ";
          count2++;
          }
        if(count2==2)
          {
          os << "</GivenName>\n";
          os << "<MiddleName> ";
          count2++;
          }
        else if(count2==3)
          {
          os << "</MiddleName>\n";
          os << "<NamePrefix> ";
          count2++;
          }
        else if(count2==4)
          {
          os << "</NamePrefix>\n";
          os << "<NameSuffix> ";
          count2++;
          }
        else
          {
          //in the rare case there are more ^ characters
          assert("Name components exceeded");
          }
        }
      else if ( c == '=' )
        {
        if(count2==1)
          {
          os << "</FamilyName>\n";
          }
        if(count2==2)
          {
          os << "</GivenName>\n";
          }
        else if(count2==3)
          {
          os << "</MiddleName>\n";
          }
        else if(count2==4)
          {
          os << "</NamePrefix>\n";
          }
        else if(count2==5)
          {
          os << "</NameSuffix>\n";
          }
        /*----------------------------------------------------------------*/
        if(count1==1)
          {
          os << "</SingleByte>\n";
          os << "<Ideographic> \n<FamilyName> ";
          count1++;
          }
        else if(count1==2)
          {
          os << "</Ideographic>\n";
          os << "<Phonetic> \n<FamilyName> ";
          count1++;
          }
        else if(count1==3)
          {
          os << "</Phonetic> \n<FamilyName> \n";
          count1++;
          }
        else
          {
          assert("Impossible - only 3 names allowed");
          }
        count2=1;
        }
      else if ( !( isprint((unsigned char)c) ) )
        os << ".";
      else if(c == '&')
        os << "&amp;";
      else if(c == '<')
        os << "&lt;";
      else if(c == '>')
        os << "&gt;";
      else if(c == '\'')
        os << "&apos;";
      else if(c == '\"')
        os << "&quot;";
      else
        os << c;
      }
    if(count2==1)
      {
      os << "</FamilyName>\n";
      }
    if(count2==2)
      {
      os << "</GivenName>\n";
      }
    else if(count2==3)
      {
      os << "</MiddleName>\n";
      }
    else if(count2==4)
      {
      os << "</NamePrefix>\n";
      }
    else if(count2==5)
      {
      os << "</NameSuffix>\n";
      }
    if(count1==1)
      {
      os << "</SingleByte>\n";
      }
    else if(count1==2)
      {
      os << "</Ideographic>\n";
      }
    else if(count1==3)
      {
      os << "</Phonetic>\n";
      }
    os << "</PersonName>";
    }

  void ByteValue::PrintASCIIXML(std::ostream &os) const
    {
    //VL length = std::min(maxlength, Length);
    // Special case for VR::UI, do not print the trailing \0

    /*if(Length && Internal[Length-1] == 0 )
      {
      Length = Length - 1;
      }
     */
    // Check for non printable characters

    int count = 1;
    os << "<Value number = \"" << count << "\" >";
    std::vector<char>::const_iterator it = Internal.begin();

    for(; it != (Internal.begin() + Length); ++it)
      {
      const char &c = *it;
      if ( c == '\\' )
        {
        count++;
        os << "</Value>\n";
        os << "<Value number = \"" << count << "\" >";
        }
      else if ( !c )
        {
        // \0 is found ...
        }
      else if(c == '&')
        os << "&amp;";
      else if(c == '<')
        os << "&lt;";
      else if(c == '>')
        os << "&gt;";
      else if(c == '\'')
        os << "&apos;";
      else if(c == '\"')
        os << "&quot;";
      else
        os << c;
      }
    os << "</Value>\n";
    }

  void ByteValue::PrintHexXML(std::ostream &os ) const
    {
    //VL length = std::min(maxlength, Length);
    // WARNING: Internal.end() != Internal.begin()+Length

    std::vector<char>::const_iterator it = Internal.begin();
    os << std::hex;
    for(; it != Internal.begin() + Length; ++it)
      {
      //const char &c = *it;
      uint8_t v = *it;
      if( it != Internal.begin() ) os << "\\";
      os << std::setw( 2 ) << std::setfill( '0' ) << (uint16_t)v;
      //++it;
      //os << std::setw( 1 ) << std::setfill( '0' ) << (int)*it;
      }
    os << std::dec;
    }
   
  void ByteValue::Append(ByteValue const & bv)
    {
    //Internal.resize( Length + bv.Length );
    Internal.insert( Internal.end(), bv.Internal.begin(), bv.Internal.end());
    Length += bv.Length;
    // post condition
    assert( Internal.size() % 2 == 0 && Internal.size() == Length );
    }
   
} // end namespace gdcm_ns
