istream68_def.h File Reference

Detailed Description

generic stream interface.

Author:: benjamin gerard

Date:: 2003/08/08

Id: istream68_def.h,v 2.6 2003/10/07 06:58:44 benjihan Exp

Generic stream interface definition.

#include "file68/istream68.h"

Go to the source code of this file.

Data Structures

struct _istream_t

Generic stream structure. More...

Open modes

#define ISTREAM_OPEN_READ_BIT   0

Read open mode bit.

#define ISTREAM_OPEN_READ   (1<<ISTREAM_OPEN_READ_BIT)

Read open mode value.

#define ISTREAM_OPEN_WRITE_BIT   1

Write open mode bit.

#define ISTREAM_OPEN_WRITE   (1<<ISTREAM_OPEN_WRITE_BIT)

Write open mode value.

#define ISTREAM_OPEN_MASK   (ISTREAM_OPEN_READ|ISTREAM_OPEN_WRITE)

Open modes mask.

#define ISTREAM_IS_OPEN(V)   (!!((V)&(ISTREAM_OPEN_READ|ISTREAM_OPEN_WRITE)))

Test if any open flags is set (returns 0 or 1).

#define ISTREAM_IS_OPEN_READ(V)   (((V)>>ISTREAM_OPEN_READ_BIT)&1)

Test if READ open flags is set (returns 0 or 1).

#define ISTREAM_IS_OPEN_WRITE(V)   (((V)>>ISTREAM_OPEN_WRITE_BIT)&1)

Test if WRITE open flags is set (returns 0 or 1).

Stream function prototypes.

typedef const char *(* istream_name_t )(istream_t *)

typedef int(* istream_open_t )(istream_t *)

typedef int(* istream_close_t )(istream_t *)

typedef int(* istream_length_t )(istream_t *)

typedef int(* istream_tell_t )(istream_t *)

typedef int(* istream_seek_t )(istream_t *, int)

typedef int(* istream_read_t )(istream_t *, void *, int)

typedef int(* istream_write_t )(istream_t *, const void *, int)

typedef void(* istream_destroy_t )(istream_t *)