Truxton file type get mime type

This retrieves the most common MIME type associated with this type of file. This corresponds to the [MIME] column of the [FileType] table.

Syntax

void truxton_file_type_get_mime_type( uint64_t file_type, char * destination_string, size_t maximum_size );

Parameters

file_type

The handle to the file type object. This handle comes from calling truxton_file_type_create().

destination_string

The string buffer where the MIME type will go.

maximum_size

The size of the destination_string buffer. The maximum number of characters written to the buffer will be maximum_size minus one to leave room for the null terminator.

Sample

void create_file_type( void )
{
   uint64_t truxton = truxton_create();

   uint64_t file_type = truxton_file_type_create( truxton );

   truxton_file_type_set_short_name( file_type, "My Type" );
   truxton_file_type_set_long_name( file_type, "A new custom type derived from XML" );
   truxton_file_type_set_parent_id( file_type, Type_XML );
   truxton_file_type_set_extension( file_type, "xm2" );
   truxton_file_type_set_mime_type( file_type, "text/xml" );

   if ( truxton_file_type_save( file_type ) == 0 )
   {
      printf( "Cannot save file type to the database.\n" );
   }

   uint64_t new_id = truxton_file_type_get_id( file_type );

   if ( new_id == 0 )
   {
      printf( "Failed to create new file type\n" );
   }
   else
   {
      printf( "Created new file type as id %" PRIu64 "\n", new_id );
   }

   char name[ 128 ];

   ZeroMemory( name, sizeof( name ) );

   truxton_file_type_get_mime_type( file_type, name, sizeof( name ) );

   printf( "MIME type is %s\n", name );

   truxton_file_type_destroy( file_type );
   truxton_destroy( truxton );
}

The PRIu64 in the sample code above is a standard way of formatting a 64-bit unsigned integer in C. Over the years, different compilers on different operating systems used different format specifiers for things, these PRI macros, along with some tricky string concatenation the compilers perform for you, allow you to maintain a single code base without a bunch of macro magic.