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

  rubyio.h -

  $Author$
  $Date$
  created at: Fri Nov 12 16:47:09 JST 1993

  Copyright (C) 1993-2003 Yukihiro Matsumoto

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

#ifndef RUBYIO_H
#define RUBYIO_H

#include <stdio.h>
#include <errno.h>

#if defined(HAVE_STDIO_EXT_H)
#include <stdio_ext.h>
#endif

typedef struct OpenFile {
    int fd;                     /* file descriptor */
    FILE *stdio_file;		/* stdio ptr for read/write if available */
    int mode;			/* mode flags */
    int pid;			/* child's pid (for pipes) */
    int lineno;			/* number of lines read */
    char *path;			/* pathname for file */
    void (*finalize) _((struct OpenFile*,int)); /* finalize proc */
    long refcnt;
    char *wbuf;                 /* wbuf_off + wbuf_len <= wbuf_capa */
    int wbuf_off;
    int wbuf_len;
    int wbuf_capa;
    char *rbuf;                 /* rbuf_off + rbuf_len <= rbuf_capa */
    int rbuf_off;
    int rbuf_len;
    int rbuf_capa;
} OpenFile;

#define FMODE_READABLE  1
#define FMODE_WRITABLE  2
#define FMODE_READWRITE 3
#define FMODE_APPEND   64
#define FMODE_CREATE  128
#define FMODE_BINMODE   4
#define FMODE_SYNC      8
#define FMODE_TTY      16
#define FMODE_DUPLEX   32

#define GetOpenFile(obj,fp) rb_io_check_closed((fp) = RFILE(rb_io_taint_check(obj))->fptr)

#define MakeOpenFile(obj, fp) do {\
    if (RFILE(obj)->fptr) {\
	rb_io_close(obj);\
	free(RFILE(obj)->fptr);\
	RFILE(obj)->fptr = 0;\
    }\
    fp = 0;\
    fp = RFILE(obj)->fptr = ALLOC(OpenFile);\
    fp->fd = -1;\
    fp->stdio_file = NULL;\
    fp->mode = 0;\
    fp->pid = 0;\
    fp->lineno = 0;\
    fp->path = NULL;\
    fp->finalize = 0;\
    fp->refcnt = 1;\
    fp->wbuf = NULL;\
    fp->wbuf_off = 0;\
    fp->wbuf_len = 0;\
    fp->wbuf_capa = 0;\
    fp->rbuf = NULL;\
    fp->rbuf_off = 0;\
    fp->rbuf_len = 0;\
    fp->rbuf_capa = 0;\
} while (0)

FILE *rb_io_stdio_file(OpenFile *fptr);

FILE *rb_fopen _((const char*, const char*));
FILE *rb_fdopen _((int, const char*));
int  rb_io_mode_flags _((const char*));
int  rb_io_modenum_flags _((int));
void rb_io_check_writable _((OpenFile*));
void rb_io_check_readable _((OpenFile*));
int rb_io_fptr_finalize _((OpenFile*));
void rb_io_synchronized _((OpenFile*));
void rb_io_check_initialized _((OpenFile*));
void rb_io_check_closed _((OpenFile*));
int rb_io_wait_readable _((int));
int rb_io_wait_writable _((int));

VALUE rb_io_taint_check _((VALUE));
NORETURN(void rb_eof_error _((void)));

void rb_io_read_check _((OpenFile*));
int rb_io_read_pending _((OpenFile*));
void rb_read_check _((FILE*));

#ifdef __GNUC__
# if ( __GNUC__ == 3 && __GNUC_MINOR__ > 0 ) || __GNUC__ > 3
#  define DEPRECATED(x) x __attribute__ ((deprecated))
# endif
#endif
#ifndef DEPRECATED
# define DEPRECATED(x) x
#endif

DEPRECATED(int rb_getc _((FILE*)));
DEPRECATED(long rb_io_fread _((char *, long, FILE *)));
DEPRECATED(long rb_io_fwrite _((const char *, long, FILE *)));
DEPRECATED(int rb_read_pending _((FILE*)));
#endif