README.md

STDIO.H FILE

The stdio.h file is well known in the C programming language because it is how you write text. I looked up the source, and I found the file on the GNU project site. The license is included in the file, so I'm not going to put it here. Anyway, have fun!

stdio.h

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)stdio.h     5.3 (Berkeley) 3/15/86
 */

/*
 * NB: to fit things in six character monocase externals, the
 * stdio code uses the prefix `__s' for stdio objects, typically
 * followed by a three-character attempt at a mnemonic.
 */

#ifndef _STDIO_H_
#ifdef __cplusplus
extern "C" {
#endif
#define _STDIO_H_

#define _FSTDIO                 /* ``function stdio'' */

#define __need_size_t
#include <stddef.h>

#define __need___va_list
#include <stdarg.h>

/*
 * <sys/reent.h> defines __sFILE, _fpos_t.
 * They must be defined there because struct _reent needs them (and we don't
 * want reent.h to include this file.
 */

struct __sFile 
 {
  int unused;
 };
  
typedef struct __sFILE FILE;

#define __SLBF  0x0001          /* line buffered */
#define __SNBF  0x0002          /* unbuffered */
#define __SRD   0x0004          /* OK to read */
#define __SWR   0x0008          /* OK to write */
        /* RD and WR are never simultaneously asserted */
#define __SRW   0x0010          /* open for reading & writing */
#define __SEOF  0x0020          /* found EOF */
#define __SERR  0x0040          /* found error */
#define __SMBF  0x0080          /* _buf is from malloc */
#define __SAPP  0x0100          /* fdopen()ed in append mode - so must  write to end */
#define __SSTR  0x0200          /* this is an sprintf/snprintf string */
#define __SOPT  0x0400          /* do fseek() optimisation */
#define __SNPT  0x0800          /* do not do fseek() optimisation */
#define __SOFF  0x1000          /* set iff _offset is in fact correct */
#define __SMOD  0x2000          /* true => fgetline modified _p text */
#if defined(__CYGWIN__) || defined(__CYGWIN__)
#define __SCLE        0x4000          /* convert line endings CR/LF <-> NL */
#endif

/*
 * The following three definitions are for ANSI C, which took them
 * from System V, which stupidly took internal interface macros and
 * made them official arguments to setvbuf(), without renaming them.
 * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
 *
 * Although these happen to match their counterparts above, the
 * implementation does not rely on that (so these could be renumbered).
*/
#define _IOFBF  0               /* setvbuf should set fully buffered */
#define _IOLBF  1               /* setvbuf should set line buffered */
#define _IONBF  2               /* setvbuf should set unbuffered */

#ifndef NULL
#define NULL    0
#endif

#define BUFSIZ  1024
#define EOF     (-1)

#define FOPEN_MAX       20      /* must be <= OPEN_MAX <sys/syslimits.h> */
#define FILENAME_MAX    1024    /* must be <= PATH_MAX <sys/syslimits.h> */
#define L_tmpnam        1024    /* XXX must be == PATH_MAX */
#ifndef __STRICT_ANSI__
#define P_tmpdir        "/tmp"
#endif
#ifndef SEEK_SET
#define SEEK_SET        0       /* set file offset to offset */
#endif
#ifndef SEEK_CUR
#define SEEK_CUR        1       /* set file offset to current plus offset */
#endif
#ifndef SEEK_END
#define SEEK_END        2       /* set file offset to EOF plus offset */
#endif

#define TMP_MAX         26

#define stdin   (_impure_ptr->_stdin)
#define stdout  (_impure_ptr->_stdout)
#define stderr  (_impure_ptr->_stderr)

#define _stdin_r(x)     ((x)->_stdin)
#define _stdout_r(x)    ((x)->_stdout)
#define _stderr_r(x)    ((x)->_stderr)

/*
* Functions defined in ANSI C standard.
*/

#ifdef __GNUC__
#define __VALIST __gnuc_va_list
#else
#define __VALIST char*
#endif

#ifndef _EXFUN
# define _EXFUN(N,P) N P
#endif

int     _EXFUN(printf, (const char *, ...));
int     _EXFUN(scanf, (const char *, ...));
int     _EXFUN(sscanf, (const char *, const char *, ...));
int     _EXFUN(vfprintf, (FILE *, const char *, __VALIST));
int     _EXFUN(vprintf, (const char *, __VALIST));
int     _EXFUN(vsprintf, (char *, const char *, __VALIST));
int     _EXFUN(vsnprintf, (char *, size_t, const char *, __VALIST));
int     _EXFUN(fgetc, (FILE *));
char *  _EXFUN(fgets, (char *, int, FILE *));
int     _EXFUN(fputc, (int, FILE *));
int     _EXFUN(fputs, (const char *, FILE *));
int     _EXFUN(getc, (FILE *));
int     _EXFUN(getchar, (void));
char *  _EXFUN(gets, (char *));
int     _EXFUN(putc, (int, FILE *));
int     _EXFUN(putchar, (int));
int     _EXFUN(puts, (const char *));
int     _EXFUN(ungetc, (int, FILE *));
size_t  _EXFUN(fread, (void *, size_t _size, size_t _n, FILE *));
size_t  _EXFUN(fwrite, (const void *, size_t _size, size_t _n, FILE *));

int     _EXFUN(sprintf, (char *, const char *, ...));
int     _EXFUN(snprintf, (char *, size_t, const char *, ...));

#ifdef __cplusplus
}
#endif
#endif /* _STDIO_H_ */