/*
 * Libraries and headers for PDC release 3.3 (C) 1989 Lionel Hummel.
 * PDC Software Distribution (C) 1989 Lionel Hummel and Paul Petersen.
 * PDC I/O Library (C) 1987 by J.A. Lydiatt.
 *
 * This code is freely redistributable upon the conditions that this 
 * notice remains intact and that modified versions of this file not
 * be included as part of the PDC Software Distribution without the
 * express consent of the copyright holders.  No warrantee of any
 * kind is provided with this code.  For further information, contact:
 *
 *  PDC Software Distribution    Internet:                     BIX:
 *  P.O. Box 4006             or hummel@cs.uiuc.edu            lhummel
 *  Urbana, IL  61801-8801       petersen@uicsrd.csrd.uiuc.edu
 */

/*
 * stdio.h
 *
 * 02.3.91 sjw; use K&R2 prototypes
 * 17.3.91 sjw; move fdopen(), fileno() to unix.h
 * 15.7.91 sjw; move them back again.
 */

#ifndef __STDIO_H__
#define __STDIO_H__

/* - bit of efficiency here - */

#ifndef __STDDEF_H__
#include <stddef.h>
#endif

#ifndef __STDARG_H__
#include <stdarg.h>
#endif

struct _iobuf {
   struct _iobuf *next;	        /* Link to next buffer in chain	          */
   int   _fileunit;             /* File descriptor                        */
   char *_filecpos;		/* Current position in buffer		  */
   char *_fileend;		/* Last position in buffer		  */
   long  _filelen;		/* Buffer size				  */
   char *_filebufp;           	/* za buffer                              */
   char  _filebyte;		/* Instant one-byte buffer                */
   char  _padbyte;
   unsigned short _fileflag;    /* Condition flags                        */
};

#define FILE struct _iobuf
extern FILE _fdevtab[];

#define BUFSIZ          (1024)
#define MAX_READ_SIZE	(1024)

#define _FILEACTIVE	0x01
#define _FILEISDIRTY	0x02
#define _FILEATEOF	0x04
#define _FILEBAD	0x08
#define _FILEISDYNA	0x10
#define _FILEISTTY	0x20

#define _IOREAD         0x1
#define _IOWRT          0x2
#define _IOEOF          0x10
#define _IOERR          0x20
#define _IORW           0x100

#define EOF		(-1)

/* defines for fseek() */
#define SEEK_SET	0
#define SEEK_CUR	1
#define SEEK_END	2
	
extern FILE *stdin;
extern FILE *stdout;
extern FILE *stderr;

/* the functions ... */

/* B1.1 */

FILE   *fopen(const char *filename, const char *mode);
FILE   *freopen(const char *filename, const char *mode, FILE *stream);
int     fflush(FILE *stream);
int     fclose(FILE *stream);
#ifndef __SYSTEM_H__
#include <system.h>
#endif
#define remove(fileName) unlink(fileName)
int     rename(const char *oldname, const char *newname);
FILE   *tmpfile(void);
char   *tmpnam(char *s);
#if 0
int     setvbuf(FILE *stream, char *buf, int mode, size_t size);
void    setbuf(FILE *stream, char *buf);
#endif

/* B1.2 */

int     fprintf(FILE *stream, const char *format, ...);
int     printf(const char *format, ...);
int     sprintf(char *s, const char *format, ...);
int     vfprintf(FILE *stream, const char *format, va_list arg);
int     vprintf(const char *format, va_list arg);
int     vsprintf(char *s, const char *format, va_list arg);

/* B1.3 */

int     fscanf(FILE *stream, const char *format, ...);
int     scanf(const char *format, ...);
int     sscanf(const char *s, const char *format, ...);

/* B1.4 */
int     fgetc(FILE *stream);
char   *fgets(char *s, int n, FILE *stream);
int     fputc(int c, FILE *stream);
int     fputs(const char *s, FILE *stream);
#define getc(c)		fgetc((c))
#define getchar()	fgetc(stdin)
#if 0
char   *gets(char *s);
#endif
#define putc(c,s)	fputc((c),(s))
#define putchar(c)	fputc((c), stdout)
int     puts(const char *s);
int     ungetc(int c, FILE *stream);

/* B1.5 */
size_t  fread(void *ptr, size_t size, size_t nobj, FILE *stream);
size_t  fwrite(const void *ptr, size_t size, size_t nobj, FILE *stream);

/* B1.6 */

int     fseek(FILE *stream, long offset, int origin);
long    ftell(FILE *stream);
void    rewind(FILE *stream);
#if 0
int     fgetpos(FILE *stream, long *ptr);  /* _nb_ not fpos_t */
int     fsetpos(FILE *stream, const long *ptr);
#endif

/* B1.7 */

#define clearerr(p)     ((p)->_fileflag &= ~(_FILEBAD|_FILEATEOF))
#define feof(p)         (((p)->_fileflag&_FILEATEOF)!=0)
#define ferror(p)       (((p)->_fileflag&_FILEBAD)!=0)
void    perror(const char *s);

/* extras */

FILE   *fdopen(int desc, const char *mode);
#define fileno(p)       ((p)->_fileunit)

#endif /* __STDIO_H__ */