zeda_stream.h

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/* ZEDA - Elementary Data and Algorithms
 * Copyright (C) 1998 Tomomichi Sugihara (Zhidao)
 */
#ifndef __ZEDA_STREAM_H__
#define __ZEDA_STREAM_H__

#include <zeda/zeda_misc.h>

#ifndef __KERNEL__

__BEGIN_DECLS

/* ********************************************************** *//* ************************************************** */

/* ********************************************************** *//* ******************************************************* */

typedef struct __zstream{
  union{
    FILE *fp;
    struct{
      byte *buf, *cur;
      size_t size;
    } mem;
  } src;
  void (* rewind)(struct __zstream *str);
  int (* seek)(struct __zstream *str, long offset);
  long (* tell)(struct __zstream *str);
  size_t (* read)(struct __zstream *str, byte *dest, size_t size, size_t nmemb);
  size_t (* write)(struct __zstream *str, byte *src, size_t size, size_t nmemb);
  int (* close)(struct __zstream *str);
} zStream;

__EXPORT void zStreamAttachFile(zStream *str, FILE *fp);

__EXPORT void zStreamAttachMem(zStream *str, byte *mem, size_t size);

__EXPORT zStream *zStreamOpenFile(zStream *str, char filename[], char *mode);

__EXPORT zStream *zStreamOpenMem(zStream *str, size_t size);

#define zStreamRewind(s)      (*(s)->rewind)( (s) )
#define zStreamSeek(s,p)      (*(s)->seek)( (s), (p) )
#define zStreamTell(s)        (*(s)->tell)( (s) )
#define zStreamRead(s,d,u,n)  (*(s)->read)( (s), (d), (u), (n) )
#define zStreamWrite(s,m,u,n) (*(s)->write)( (s), (m), (u), (n) )
#define zStreamClose(s)       (*(s)->close)( (s) )

__END_DECLS

#endif /* __KERNEL__ */

#endif /* __ZEDA_STREAM_H__ */