source: libcfa/src/enum.cfa @ dbff8ec

#include "enum.hfa"
#include "fstream.hfa"
#include <stdlib.h>                                                                             // qsort
#include <string.h>

#pragma GCC visibility push(default)

int scmp( const void * str1, const void * str2 ) {
    return -strcmp( *(char **)str1, *(char **)str2 );   // dscending order
} // scmp

forall( istype & | istream( istype ), E, V | CfaEnum( E, V ) )
istype & ?|?( istype & is, E & e ) {
//      printf( "here0\n" );
        if ( eof( is ) ) throwResume ExceptionInst( missing_data );

        // Match input enumerator string to enumerator labels.
        int len = -1;
        const char * cpy[ 20 /*countof( E )*/ ];
        int i = 0;
        for ( s; E ) {
                cpy[i] = label( s );
                printf( "%s\n", cpy[i] );
                i += 1;
        }
        printf( "%d\n", i );
        qsort( cpy, i, sizeof(char*), scmp );
        i = 0;
        for ( s; E ) {
                printf( "%s\n", cpy[i] );
                i += 1;
        }
        int j = 0;
  X : for ( s; E ) {
                len = strlen( cpy[j] );
                printf( "%s %d\n", cpy[j], len );
                char fmtstr[len + 16];
                fmtstr[0] = ' ';                                                                // optional leadig whitespace
                strcpy( &fmtstr[1], cpy[j] );                                   // copy format and add %n
                strcpy( &fmtstr[len + 1], "%n" );
                printf( "%s\n", fmtstr );
                len = -1;
                // scanf cursor does not move if no match
                fmt( is, fmtstr, &len );
                printf( "%s %d %d\n", fmtstr, len, j );
          if ( eof( is ) ) { break; }
          if ( len != -1 ) {
                  for ( s; E ) {
                          if ( strcmp( label( s ), cpy[j] ) == 0 ) { e = s; break X; }
                  }
          }
                j += 1;
        } else {
                //ExceptionInst( missing_data );
        } // for
        printf( "X %s %d\n", label( e ), len );
        if ( ! eof( is ) && len == -1 ) throwResume ExceptionInst( missing_data );

        // if ( eof( is ) ) throwResume ExceptionInst( missing_data );
        // char val[256];
        // int args = fmt( is, "%255s", val );
        // if ( ! eof( is ) && args != 1 ) throwResume ExceptionInst( missing_data );
        // for ( s; E ) {
        //      if ( strcmp(val, label( s )) == 0 ) { e = s; break; }
        // } else {
        //      fprintf( stderr, "invalid enumeration constant\n" );
        //      abort();                                                                        // cannot use abort stream
        // } // for
        return is;
}

forall( ostype & | ostream( ostype ), E, V | CfaEnum( E, V ) ) {
        ostype & ?|?( ostype & os, E e ) {
                return os | label( e );
        }
        OSTYPE_VOID_IMPL( E )
}

forall( ostype & | ostream( ostype ), E | CfaEnum( E, quasi_void ) ) {
        ostype & ?|?( ostype & os, E e ) {
                return os | label( e );
        }
        OSTYPE_VOID_IMPL( E )
}