/*

* FUNCTION

* <<vprintf>>, <<vfprintf>>, <<vsprintf>>---format argument list

* INDEX

* vprintf

* INDEX

* vfprintf

* INDEX

* vsprintf

* ANSI_SYNOPSIS

* #include <stdio.h>

* #include <stdarg.h>

* int vprintf(const char *<[fmt]>, va_list <[list]>);

* int vfprintf(FILE *<[fp]>, const char *<[fmt]>, va_list <[list]>);

* int vsprintf(char *<[str]>, const char *<[fmt]>, va_list <[list]>);

* int _vprintf_r(void *<[reent]>, const char *<[fmt]>,

* va_list <[list]>);

* int _vfprintf_r(void *<[reent]>, FILE *<[fp]>, const char *<[fmt]>,

* va_list <[list]>);

* int _vsprintf_r(void *<[reent]>, char *<[str]>, const char *<[fmt]>,

* va_list <[list]>);

* TRAD_SYNOPSIS

* #include <stdio.h>

* #include <varargs.h>

* int vprintf( <[fmt]>, <[list]>)

* char *<[fmt]>;

* va_list <[list]>;

* int vfprintf(<[fp]>, <[fmt]>, <[list]>)

* FILE *<[fp]>;

* char *<[fmt]>;

* va_list <[list]>;

* int vsprintf(<[str]>, <[fmt]>, <[list]>)

* char *<[str]>;

* char *<[fmt]>;

* va_list <[list]>;

* int _vprintf_r(<[reent]>, <[fmt]>, <[list]>)

* char *<[reent]>;

* char *<[fmt]>;

* va_list <[list]>;

* int _vfprintf_r(<[reent]>, <[fp]>, <[fmt]>, <[list]>)

* char *<[reent]>;

* FILE *<[fp]>;

* char *<[fmt]>;

* va_list <[list]>;

* int _vsprintf_r(<[reent]>, <[str]>, <[fmt]>, <[list]>)

* char *<[reent]>;

* char *<[str]>;

* char *<[fmt]>;

* va_list <[list]>;

* <<vprintf>>, <<vfprintf>>, and <<vsprintf>> are (respectively)

* variants of <<printf>>, <<fprintf>>, and <<sprintf>>.  They differ

* only in allowing their caller to pass the variable argument list as a

* <<va_list>> object (initialized by <<va_start>>) rather than directly

* accepting a variable number of arguments.

* RETURNS

* The return values are consistent with the corresponding functions:

* <<vsprintf>> returns the number of bytes in the output string,

* save that the concluding <<NULL>> is not counted.

* <<vprintf>> and <<vfprintf>> return the number of characters transmitted.

* If an error occurs, <<vprintf>> and <<vfprintf>> return <<EOF>>. No

* error returns occur for <<vsprintf>>.

* PORTABILITY

* ANSI C requires all three functions.

* Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,

* <<lseek>>, <<read>>, <<sbrk>>, <<write>>.

* 

*

*/

/*-

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Chris Torek.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *	This product includes software developed by the University of

 *	California, Berkeley and its contributors.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

/*

 * Actual printf innards.

 *

 * This code is large and complicated...

 */

#if 1

#define _NO_LONGLONG

#endif

#include <_ansi.h>

#include <stdio_r.h>

#include <stdlib_r.h>

#include <string.h>

#include <reent.h>

#include <stdarg.h>

#include "LOCAL.H"

#include "FVWRITE.H"

//cm

#include <stdlib.h>

/*

 * Flush out all the vectors defined by the given uio,

 * then reset it so that it can be reused.

 */

static int

__sprint(FILE *fp,register struct __suio *uio)

{

	register int err;

	if (uio->uio_resid == 0) {

		uio->uio_iovcnt = 0;

		return (0);

	}

	err = __sfvwrite(fp, uio);

	uio->uio_resid = 0;

	uio->uio_iovcnt = 0;

	return (err);

}

/*

 * Helper function for `fprintf to unbuffered unix file': creates a

 * temporary buffer.  We only work on write-only files; this avoids

 * worries about ungetc buffers and so forth.

 */

static int

__sbprintf(register FILE *fp,const char *fmt,va_list ap)

{

	int ret;

	FILE fake;

	unsigned char buf[BUFSIZ];

	/* copy the important variables */

	fake._data = fp->_data;

	fake._flags = (short)(fp->_flags & ~__SNBF);

	fake._file = fp->_file;

	fake._cookie = fp->_cookie;

	fake._write = fp->_write;

	/* set up the buffer */

	fake._bf._base = fake._p = buf;

	fake._bf._size = fake._w = sizeof(buf);

	fake._lbfsize = 0;	/* not actually used, but Just In Case */

	/* do the work, then copy any error status */

	ret = vfprintf(&fake, fmt, ap);

	if (ret >= 0 && fflush(&fake))

		ret = EOF;

	if (fake._flags & __SERR)

		fp->_flags |= __SERR;

	return (ret);

}

/* #include <locale.h>   for decimal_point */

#include <math.h>

#include "FLOATIO.H"

#define	BUF		(MAXEXP+MAXFRACT+1)	/* + decimal point */

#define	DEFPREC		6

extern int e32cvt (char *buf, int buflen, double, int width, int prec, int flags, int fmt);

/*

 * Macros for converting digits to letters and vice versa

 */

#define	to_digit(c)	((c) - '0')

#define is_digit(c)	((unsigned)to_digit(c) <= 9)

#define	to_char(n)	((n) + '0')

/*

 * Flags used during conversion.

 */

#define	ALT		0x001		/* alternate form */

#define	HEXPREFIX	0x002		/* add 0x or 0X prefix */

#define	LADJUST		0x004		/* left adjustment */

#define	LONGDBL		0x008		/* long double; unimplemented */

#define	LONGINT		0x010		/* long integer */

#define	QUADINT		0x020		/* quad integer */

#define	SHORTINT	0x040		/* short integer */

#define	ZEROPAD		0x080		/* zero (as opposed to blank) pad */

#define FPT		0x100		/* Floating point number */

EXPORT_C int 

vfprintf (FILE * fp, const char *fmt0, va_list ap)

{

  return _vfprintf_r (fp->_data, fp, fmt0, ap);

}

/**

A reentrant version of vfprintf().

*/

EXPORT_C int 

_vfprintf_r (struct _reent *data, FILE * fp, const char *fmt0, va_list ap)

{

	register char *fmt;	/* format string */

	register int ch;	/* character from fmt */

	register int n, m;	/* handy integers (short term usage) */

	register char *cp;	/* handy char pointer (short term usage) */

	register struct __siov *iovp;/* for PRINT macro */

	register int flags;	/* flags as above */

	int ret;		/* return value accumulator */

	int width;		/* width from format (%8d), or 0 */

	int prec;		/* precision from format (%.3d), or -1 */

	char sign;		/* sign prefix (' ', '+', '-', or \0) */

	wchar_t wc;

#if 0

	char *decimal_point = "."; /* localeconv()->decimal_point; */

#endif

//	char softsign;		/* temporary negative sign for floats */

	double _double;		/* double precision arguments %[eEfgG] */

//	int expt;		/* integer value of exponent */

//	int expsize;		/* character count for expstr */

//	int ndig;		/* actual number of digits returned by cvt */

//	char expstr[7];		/* buffer for exponent string */

#ifndef _NO_LONGLONG

#define	quad_t	  long long

#define	u_quad_t  unsigned long long

#endif

#ifndef _NO_LONGLONG

	u_quad_t _uquad;	/* integer arguments %[diouxX] */

#else

	u_long _uquad;

#endif

	enum { OCT, DEC, HEX } base;/* base for [diouxX] conversion */

	int dprec;		/* a copy of prec if [diouxX], 0 otherwise */

	int realsz;		/* field size expanded by dprec */

	int size;		/* size of converted field or string */

	char *xdigs = NULL;	/* digits for [xX] conversion */

#define NIOV 8

	struct __suio uio;	/* output information: summary */

	struct __siov iov[NIOV];/* ... and individual io vectors */

	char buf[BUF];		/* space for %c, %[diouxX], %[eEfgG] */

	char ox[2];		/* space for 0x hex-prefix */

	/*

	 * Choose PADSIZE to trade efficiency vs. size.  If larger printf

	 * fields occur frequently, increase PADSIZE and make the initialisers

	 * below longer.

	 */

#define	PADSIZE	16		/* pad chunk size */

	static const char blanks[PADSIZE] =

	 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};

	static const char zeroes[PADSIZE] =

	 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};

	/*

	 * BEWARE, these `goto error' on error, and PAD uses `n'.

	 */

#define	PRINT(ptr, len) { \

	iovp->iov_base = (ptr); \

	iovp->iov_len = (len); \

	uio.uio_resid += (len); \

	iovp++; \

	if (++uio.uio_iovcnt >= NIOV) { \

		if (__sprint(fp, &uio)) \

			goto error; \

		iovp = iov; \

	} \

}

#define	PAD(howmany, with) { \

	if ((n = (howmany)) > 0) { \

		while (n > PADSIZE) { \

			PRINT(with, PADSIZE); \

			n -= PADSIZE; \

		} \

		PRINT(with, n); \

	} \

}

#define	FLUSH() { \

	if (uio.uio_resid && __sprint(fp, &uio)) \

		goto error; \

	uio.uio_iovcnt = 0; \

	iovp = iov; \

}

	/*

	 * To extend shorts properly, we need both signed and unsigned

	 * argument extraction methods.

	 */

#ifndef _NO_LONGLONG

#define	SARG() \

	(flags&QUADINT ? va_arg(ap, quad_t) : \

	    flags&LONGINT ? va_arg(ap, long) : \

	    flags&SHORTINT ? (long)(short)va_arg(ap, int) : \

	    (long)va_arg(ap, int))

#define	UARG() \

	(flags&QUADINT ? va_arg(ap, u_quad_t) : \

	    flags&LONGINT ? va_arg(ap, u_long) : \

	    flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \

	    (u_long)va_arg(ap, u_int))

#else

#define	SARG() \

	(flags&LONGINT ? va_arg(ap, long) : \

	    flags&SHORTINT ? (long)(short)va_arg(ap, int) : \

	    (long)va_arg(ap, int))

#define	UARG() \

	(flags&LONGINT ? va_arg(ap, u_long) : \

	    flags&SHORTINT ? (u_long)(u_short)va_arg(ap, int) : \

	    (u_long)va_arg(ap, u_int))

#endif

	CHECK_INIT (fp);

	/* sorry, fprintf(read_only_file, "") returns EOF, not 0 */

	if (cantwrite(fp))

		return (EOF);

	/* optimise fprintf(stderr) (and other unbuffered Unix files) */

	if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&

	    fp->_file >= 0)

		return (__sbprintf(fp, fmt0, ap));

	fmt = (char *)fmt0;

	uio.uio_iov = iovp = iov;

	uio.uio_resid = 0;

	uio.uio_iovcnt = 0;

	ret = 0;

	/*

	 * Scan the format for conversions (`%' character).

	 */

	for (;;) {

		cp = fmt;

		while ((n = mbtowc(&wc, fmt, MB_CUR_MAX)) > 0) {

			fmt += n;

			if (wc == L'%') {

				fmt--;

				break;

			}

		}

		if ((m = fmt - cp) != 0) {

			PRINT(cp, m);

			ret += m;

		}

		if (n <= 0)

			goto done;

		fmt++;		/* skip over '%' */

		flags = 0;

		dprec = 0;

		width = 0;

		prec = -1;

		sign = '\0';

rflag:		ch = *fmt++;

reswitch:	switch (ch) {

		case ' ':

			/*

			 * ``If the space and + flags both appear, the space

			 * flag will be ignored.''

			 *	-- ANSI X3J11

			 */

			if (!sign)

				sign = ' ';

			goto rflag;

		case '#':

			flags |= ALT;

			goto rflag;

		case '*':

			/*

			 * ``A negative field width argument is taken as a

			 * - flag followed by a positive field width.''

			 *	-- ANSI X3J11

			 * They don't exclude field widths read from args.

			 */

			if ((width = va_arg(ap, int)) >= 0)

				goto rflag;

			width = -width;

			/* FALLTHROUGH */

		case '-':

			flags |= LADJUST;

			goto rflag;

		case '+':

			sign = '+';

			goto rflag;

		case '.':

			if ((ch = *fmt++) == '*') {

				n = va_arg(ap, int);

				prec = n < 0 ? -1 : n;

				goto rflag;

			}

			n = 0;

			while (is_digit(ch)) {

				n = 10 * n + to_digit(ch);

				ch = *fmt++;

			}

			prec = n < 0 ? -1 : n;

			goto reswitch;

		case '0':

			/*

			 * ``Note that 0 is taken as a flag, not as the

			 * beginning of a field width.''

			 *	-- ANSI X3J11

			 */

			flags |= ZEROPAD;

			goto rflag;

		case '1': case '2': case '3': case '4':

		case '5': case '6': case '7': case '8': case '9':

			n = 0;

			do {

				n = 10 * n + to_digit(ch);

				ch = *fmt++;

			} while (is_digit(ch));

			width = n;

			goto reswitch;

		case 'L':

			flags |= LONGDBL;

			goto rflag;

		case 'h':

			flags |= SHORTINT;

			goto rflag;

		case 'l':

			if (*fmt == 'l') {

				fmt++;

				flags |= QUADINT;

			} else {

				flags |= LONGINT;

			}

			goto rflag;

		case 'q':

			flags |= QUADINT;

			goto rflag;

		case 'c':

			*(cp = buf) = (char)va_arg(ap, int);

			size = 1;

			sign = '\0';

			break;

		case 'D':

			flags |= LONGINT;

			/*FALLTHROUGH*/

		case 'd':

		case 'i':

			_uquad = SARG();

#ifndef _NO_LONGLONG

			if ((quad_t)_uquad < 0)

#else

			if ((long) _uquad < 0)

#endif

			{

#ifndef _NO_LONGLONG

				_uquad = -_uquad;

#else

				_uquad = (u_long)(-(long)_uquad);

#endif

				sign = '-';

			}

			base = DEC;

			goto number;

		case 'e':

		case 'E':

		case 'f':

		case 'g':

		case 'G':

			if (prec == -1) {

				prec = DEFPREC;

			} else if ((ch == 'g' || ch == 'G') && prec == 0) {

				prec = 1;

			}

			if (flags & LONGDBL) {

				_double = (double) va_arg(ap, long double);

			} else {

				_double = va_arg(ap, double);

			}

			/* do this before tricky precision changes */

			if (isinf(_double)) {

				if (_double < 0)

					sign = '-';

				cp = "Inf";

				size = 3;

				break;

			}

			if (isnan(_double)) {

				cp = "NaN";

				size = 3;

				break;

			}

			flags |= FPT;

#if 0

			cp = cvt(data, _double, prec, flags, &softsign,

				&expt, ch, &ndig);

			if (ch == 'g' || ch == 'G') {

				if (expt <= -4 || expt > prec)

					ch = (ch == 'g') ? 'e' : 'E';

				else

					ch = 'g';

			} 

			if (ch <= 'e') {	/* 'e' or 'E' fmt */

				--expt;

				expsize = exponent(expstr, expt, ch);