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#include <stdio.h>
#include <errno.h>
#ifndef NULL
/* ANSI C */
#include <stddef.h>
#endif
#ifndef SEEK_SET
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
#endif
#if defined (MSDOS) && !defined (GO32)
#ifndef NON_UNIX_STDIO
#define NON_UNIX_STDIO
#endif
#endif
#ifdef UIOLEN_int
typedef int uiolen;
#else
typedef long uiolen;
#endif
/*units*/
typedef struct
{ FILE *ufd; /*0=unconnected*/
char *ufnm;
#if !(defined (MSDOS) && !defined (GO32))
long uinode;
int udev;
#endif
int url; /*0=sequential*/
flag useek; /*true=can backspace, use dir, ...*/
flag ufmt;
flag uprnt;
flag ublnk;
flag uend;
flag uwrt; /*last io was write*/
flag uscrtch;
} unit;
extern flag f__init;
extern cilist *f__elist; /*active external io list*/
extern flag f__reading,f__external,f__sequential,f__formatted;
#undef Void
#ifdef KR_headers
#define Void /*void*/
extern int (*f__getn)(),(*f__putn)(); /*for formatted io*/
extern long f__inode();
extern VOID sig_die();
extern int (*f__donewrec)(), t_putc(), x_wSL();
extern int c_sfe(), err__fl(), xrd_SL();
#else
#define Void void
#ifdef __cplusplus
extern "C" {
#endif
extern int (*f__getn)(void),(*f__putn)(int); /*for formatted io*/
extern long f__inode(char*,int*);
extern void sig_die(char*,int);
extern void f__fatal(int,char*);
extern int t_runc(alist*);
extern int f__nowreading(unit*), f__nowwriting(unit*);
extern int fk_open(int,int,ftnint);
extern int en_fio(void);
extern void f_init(void);
extern int (*f__donewrec)(void), t_putc(int), x_wSL(void);
extern void b_char(char*,char*,ftnlen), g_char(char*,ftnlen,char*);
extern int c_sfe(cilist*), z_rnew(void);
extern int isatty(int);
extern int err__fl(int,int,char*);
extern int xrd_SL(void);
#ifdef __cplusplus
}
#endif
#endif
extern int (*f__doend)(Void);
extern FILE *f__cf; /*current file*/
extern unit *f__curunit; /*current unit*/
extern unit f__units[];
#define err(f,m,s) {if(f) errno= m; else f__fatal(m,s); return(m);}
#define errfl(f,m,s) return err__fl((int)f,m,s)
/*Table sizes*/
#define MXUNIT 100
extern int f__recpos; /*position in current record*/
extern int f__cursor; /* offset to move to */
extern int f__hiwater; /* so TL doesn't confuse us */
#define WRITE 1
#define READ 2
#define SEQ 3
#define DIR 4
#define FMT 5
#define UNF 6
#define EXT 7
#define INT 8
#define buf_end(x) (x->_flag & _IONBF ? x->_ptr : x->_base + BUFSIZ)
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