FITSHeaderKeyword.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.7.0
// ----------------------------------------------------------------------------
// pcl/FITSHeaderKeyword.h - Released 2024-06-18T15:48:54Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
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// ----------------------------------------------------------------------------
 
#ifndef __PCL_FITSHeaderKeyword_h
#define __PCL_FITSHeaderKeyword_h
 
 
#include <pcl/Defs.h>
#include <pcl/Diagnostics.h>
 
#include <pcl/Array.h>
#include <pcl/String.h>
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
class PCL_CLASS FITSHeaderKeyword
{
public:
 
   IsoString name;    
   IsoString value;   
   IsoString comment; 
 
   FITSHeaderKeyword() = default;
 
   FITSHeaderKeyword( const FITSHeaderKeyword& ) = default;
 
   FITSHeaderKeyword( FITSHeaderKeyword&& ) = default;
 
   FITSHeaderKeyword( const IsoString& a_name,
                      const IsoString& a_value = IsoString(),
                      const IsoString& a_comment = IsoString() )
      : name( a_name )
      , value( a_value )
      , comment( a_comment )
   {
      Trim();
   }
 
   template <class S1, class S2, class S3>
   FITSHeaderKeyword( const S1& a_name, const S2& a_value, const S3& a_comment )
      : name( IsoString( a_name ) )
      , value( IsoString( a_value ) )
      , comment( IsoString( a_comment ) )
   {
      Trim();
   }
 
   FITSHeaderKeyword& operator =( const FITSHeaderKeyword& ) = default;
 
   bool IsNull() const
   {
      return value.IsEmpty();
   }
 
   bool IsString() const
   {
      return value.StartsWith( '\'' );
   }
 
   bool IsBoolean() const
   {
      return value == 'T' || value == 'F';
   }
 
   bool IsNumeric() const
   {
      return value.IsNumeral();
   }
 
   bool GetNumericValue( double& v ) const
   {
      if ( value.TryToDouble( v ) )
         return true;
      v = 0;
      return false;
   }
 
   IsoString StripValueDelimiters() const
   {
      IsoString stripped;
 
      if ( !value.IsEmpty() && *value == '\'' ) // leading delimiter ?
      {
         size_type n = value.Length()-1;
         if ( value[n] == '\'' ) // trailing delimiter ?
            --n;
         stripped = value.Substring( 1, n );
      }
      else
         stripped = value;
 
      return stripped.Trimmed();
   }
 
   bool FixValueDelimiters()
   {
      double dum;
      if ( !IsNull() )
         if ( !IsString() )
            if ( !IsBoolean() )
               if ( !IsNumeric() || !value.TryToDouble( dum ) )
               {
                  value.EnsureSingleQuoted();
                  return true;
               }
      return false;
   }
 
   void Trim()
   {
      name.Trim();
      value.Trim();
      comment.Trim();
   }
};
 
// ----------------------------------------------------------------------------
 
using FITSKeywordArray = Array<FITSHeaderKeyword>;
 
// ----------------------------------------------------------------------------
 
inline bool operator ==( const FITSHeaderKeyword& h1, const FITSHeaderKeyword& h2 )
{
   // Keyword name comparison is case-insensitive as per the FITS standard.
   return h1.name.CompareIC( h2.name ) == 0 && h1.value == h2.value && h1.comment == h2.comment;
}
 
inline bool operator <( const FITSHeaderKeyword& h1, const FITSHeaderKeyword& h2 )
{
   int i = h1.name.CompareIC( h2.name );
   return i < 0 || i == 0 && (h1.value < h2.value || h1.value == h2.value && h1.comment < h2.comment);
}
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif   // __PCL_FITSHeaderKeyword_h
 
// ----------------------------------------------------------------------------
// EOF pcl/FITSHeaderKeyword.h - Released 2024-06-18T15:48:54Z