item_print_functions.h

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/*
 * Functions for printing simple data.
 *
 * Comes with the most common types pre-defined, and macros to define more.
 */
 
#ifndef CLIBS_PRINT_FUNCTIONS_H
#define CLIBS_PRINT_FUNCTIONS_H
 
#include "headers/attributes.h"
#include "headers/errors.h"
 
#include <stdbool.h>
 

typedef void ( *PrintFunction )( const void *, size_t );

LibraryDefined bool PrintFunctions_DoPrintType = false;
 
#ifndef TYPE_SEPARATOR
#define TYPE_SEPARATOR ": "
#endif //TYPE_SEPARATOR
 

#define ITEM_PRINT_FUNCTION_NAME( type ) Print_##type

#define DECLARE_PRINT_FUNC( name ) \
    void ITEM_PRINT_FUNCTION_NAME( name )( const void *, size_t )
 
/* Default */
DECLARE_PRINT_FUNC( byte );
 
/* Basic types */
DECLARE_PRINT_FUNC( bool );
DECLARE_PRINT_FUNC( int );
DECLARE_PRINT_FUNC( size_t );
DECLARE_PRINT_FUNC( ssize_t );
DECLARE_PRINT_FUNC( int8_t );
DECLARE_PRINT_FUNC( char );
DECLARE_PRINT_FUNC( float );
DECLARE_PRINT_FUNC( double );
DECLARE_PRINT_FUNC( pointer );
 
/* Special */
DECLARE_PRINT_FUNC( string );
DECLARE_PRINT_FUNC( string_direct );
 

#define DEFINE_PRINT_FUNC( type, format_str )                                      \
    void ITEM_PRINT_FUNCTION_NAME( type )( const void *data, const size_t nbytes ) \
    {                                                                              \
        if ( nbytes != sizeof( type ) )                                            \
        {                                                                          \
            fwarnx( "invalid data" );                                              \
            return;                                                                \
        }                                                                          \
                                                                                   \
        if ( PrintFunctions_DoPrintType )                                          \
        {                                                                          \
            printf( "‹" );                                                         \
            printf( #type TYPE_SEPARATOR );                                        \
        }                                                                          \
        printf( format_str, *( ( type * ) data ) );                                \
        if ( PrintFunctions_DoPrintType )                                          \
            printf( "›" );                                                         \
    }
 
#endif //CLIBS_PRINT_FUNCTIONS_H