avr-libc-1.7.1/libc/stdio/vfprintf.c - toolchain/avr-libc - Git at Google

 /* Copyright (c) 2002, Alexander Popov (sasho@vip.bg)
    Copyright (c) 2002,2004,2005 Joerg Wunsch
    Copyright (c) 2005, Helmut Wallner
    Copyright (c) 2007, Dmitry Xmelkov
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * 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.
    * Neither the name of the copyright holders nor the names of
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
 */

 /* From: Id: printf_p_new.c,v 1.1.1.9 2002/10/15 20:10:28 joerg_wunsch Exp */
 /* $Id: vfprintf.c 2191 2010-11-05 13:45:57Z arcanum $ */

 #if !defined(__AVR_TINY__)

 #include <avr/pgmspace.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include "sectionname.h"
 #include "stdio_private.h"
 #include "ftoa_engine.h"
 #include "ntz.h"
 #include "xtoa_fast.h"

 /*
  * This file can be compiled into more than one flavour.  The default
  * is to offer the usual modifiers and integer formatting support
  * (level 2).  Level 1 maintains a minimal version that just offers
  * integer formatting, but no modifier support whatsoever.  Level 3 is
  * intented for floating point support.
  */

 #ifndef PRINTF_LEVEL
 # define PRINTF_LEVEL PRINTF_STD
 #endif

 #if PRINTF_LEVEL == PRINTF_MIN || PRINTF_LEVEL == PRINTF_STD \
     || PRINTF_LEVEL == PRINTF_FLT
 /* OK */
 #else
 # error "Not a known printf level."
 #endif

 #ifndef	__AVR_HAVE_LPMX__
 # if  defined(__AVR_ENHANCED__) && __AVR_ENHANCED__
 #  define __AVR_HAVE_LPMX__	1
 # endif
 #endif

 #if  defined(__AVR_HAVE_LPMX__) && __AVR_HAVE_LPMX__
 # define GETBYTE(flag, mask, pnt)	({	\
     unsigned char __c;				\
     asm (					\
 	"sbrc	%2,%3	\n\t"			\
 	"lpm	%0,Z+	\n\t"			\
 	"sbrs	%2,%3	\n\t"			\
 	"ld	%0,Z+	"			\
 	: "=r" (__c),				\
 	  "+z" (pnt)				\
 	: "r" (flag),				\
 	  "I" (ntz(mask))			\
     );						\
     __c;					\
 })
 #elif	1
 # define GETBYTE(flag, mask, pnt)	({	\
     unsigned char __c;				\
     asm (					\
 	"sbrc	%2,%3	\n\t"			\
 	"lpm		\n\t"			\
 	"sbrs	%2,%3	\n\t"			\
 	"ld	r0,Z	\n\t"			\
 	"adiw	r30,1	\n\t"			\
 	"mov	%0,r0	"			\
 	: "=r" (__c),				\
 	  "+z" (pnt)				\
 	: "r" (flag),				\
 	  "I" (ntz(mask))			\
 	: "r0"					\
     );						\
     __c;					\
 })
 #else
 # define GETBYTE(flag, mask, pnt)	({	\
     unsigned char __c;				\
     __c = ((flag) & (mask))			\
 	  ? pgm_read_byte(pnt) : *pnt;		\
     pnt++;					\
     __c;					\
 })
 #endif

 /* --------------------------------------------------------------------	*/
 #if  PRINTF_LEVEL <= PRINTF_MIN

 #define FL_PGMSTRING	0x01
 #define FL_ALTHEX	0x04
 #define FL_ALT		0x10
 #define FL_ALTLWR	0x20
 #define FL_NEGATIVE	0x40
 #define FL_LONG 	0x80

 ATTRIBUTE_CLIB_SECTION
 int
 vfprintf (FILE * stream, const char *fmt, va_list ap)
 {
     unsigned char c;		/* holds a char from the format string */
     unsigned char flags;
     unsigned char buf[11];	/* size for -1 in octal, without '\0'	*/

     stream->len = 0;

     if ((stream->flags & __SWR) == 0)
 	return EOF;

     for (;;) {

 	for (;;) {
 	    c = GETBYTE (stream->flags, __SPGM, fmt);
 	    if (!c) goto ret;
 	    if (c == '%') {
 		c = GETBYTE (stream->flags, __SPGM, fmt);
 		if (c != '%') break;
 	    }
 	    putc (c, stream);
 	}

 	for (flags = 0;
 	     !(flags & FL_LONG);	/* 'll' will detect as error	*/
 	     c = GETBYTE (stream->flags, __SPGM, fmt))
 	{
 	    if (c && strchr_P (PSTR(" +-.0123456789h"), c))
 		continue;
 	    if (c == '#') {
 		flags |= FL_ALT;
 		continue;
 	    }
 	    if (c == 'l') {
 		flags |= FL_LONG;
 		continue;
 	    }
 	    break;
 	}

 	/* Only a format character is valid.	*/

 	if (c && strchr_P (PSTR("EFGefg"), c)) {
 	    (void) va_arg (ap, double);
 	    putc ('?', stream);
 	    continue;
 	}

 	{
 	    const char * pnt;

 	    switch (c) {

 	      case 'c':
 		putc (va_arg (ap, int), stream);
 		continue;

 	      case 'S':
 		flags |= FL_PGMSTRING;
 		/* FALLTHROUGH */

 	      case 's':
 		pnt = va_arg (ap, char *);
 	        while ( (c = GETBYTE (flags, FL_PGMSTRING, pnt)) != 0)
 		    putc (c, stream);
 		continue;
 	    }
 	}

 	if (c == 'd' || c == 'i') {
 	    long x = (flags & FL_LONG) ? va_arg(ap,long) : va_arg(ap,int);
 	    flags &= ~FL_ALT;
 	    if (x < 0) {
 		x = -x;
 		/* `putc ('-', stream)' will considarably inlarge stack size.
 		   So flag is used.	*/
 		flags |= FL_NEGATIVE;
 	    }
 	    c = __ultoa_invert (x, (char *)buf, 10) - (char *)buf;

 	} else {
 	    int base;

 	    switch (c) {
 	      case 'u':
 		flags &= ~FL_ALT;
 	        base = 10;
 		goto ultoa;
 	      case 'o':
 	        base = 8;
 		goto ultoa;
 	      case 'p':
 	        flags |= FL_ALT;
 		/* no break */
 	      case 'x':
 		flags |= (FL_ALTHEX | FL_ALTLWR);
 	        base = 16;
 		goto ultoa;
 	      case 'X':
 		flags |= FL_ALTHEX;
 	        base = 16 | XTOA_UPPER;
 	      ultoa:
 		c = __ultoa_invert ((flags & FL_LONG)
 				    ? va_arg(ap, unsigned long)
 				    : va_arg(ap, unsigned int),
 				    (char *)buf, base)  -  (char *)buf;
 		break;

 	      default:
 	        goto ret;
 	    }
 	}

 	/* Integer number output.	*/
 	if (flags & FL_NEGATIVE)
 	    putc ('-', stream);
 	if ((flags & FL_ALT) && (buf[c-1] != '0')) {
 	    putc ('0', stream);
 	    if (flags & FL_ALTHEX)
 #if  FL_ALTLWR != 'x' - 'X'
 # error
 #endif
 		putc ('X' + (flags & FL_ALTLWR), stream);
 	}
 	do {
 	    putc (buf[--c], stream);
 	} while (c);

     } /* for (;;) */

   ret:
     return stream->len;
 }

 /* --------------------------------------------------------------------	*/
 #else	/* i.e. PRINTF_LEVEL > PRINTF_MIN */

 #define FL_ZFILL	0x01
 #define FL_PLUS		0x02
 #define FL_SPACE	0x04
 #define FL_LPAD		0x08
 #define FL_ALT		0x10
 #define FL_WIDTH	0x20
 #define FL_PREC		0x40
 #define FL_LONG		0x80

 #define FL_PGMSTRING	FL_LONG
 #define FL_NEGATIVE	FL_LONG

 #define FL_ALTUPP	FL_PLUS
 #define FL_ALTHEX	FL_SPACE

 #define	FL_FLTUPP	FL_ALT
 #define FL_FLTEXP	FL_PREC
 #define	FL_FLTFIX	FL_LONG

 ATTRIBUTE_CLIB_SECTION
 int vfprintf (FILE * stream, const char *fmt, va_list ap)
 {
     unsigned char c;		/* holds a char from the format string */
     unsigned char flags;
     unsigned char width;
     unsigned char prec;
     unsigned char buf[11];	/* size for -1 in octal, without '\0'	*/

     stream->len = 0;

     if ((stream->flags & __SWR) == 0)
 	return EOF;

     for (;;) {

 	for (;;) {
 	    c = GETBYTE (stream->flags, __SPGM, fmt);
 	    if (!c) goto ret;
 	    if (c == '%') {
 		c = GETBYTE (stream->flags, __SPGM, fmt);
 		if (c != '%') break;
 	    }
 	    putc (c, stream);
 	}

 	flags = 0;
 	width = 0;
 	prec = 0;

 	do {
 	    if (flags < FL_WIDTH) {
 		switch (c) {
 		  case '0':
 		    flags |= FL_ZFILL;
 		    continue;
 		  case '+':
 		    flags |= FL_PLUS;
 		    /* FALLTHROUGH */
 		  case ' ':
 		    flags |= FL_SPACE;
 		    continue;
 		  case '-':
 		    flags |= FL_LPAD;
 		    continue;
 		  case '#':
 		    flags |= FL_ALT;
 		    continue;
 		}
 	    }

 	    if (flags < FL_LONG) {
 		if (c >= '0' && c <= '9') {
 		    c -= '0';
 		    if (flags & FL_PREC) {
 			prec = 10*prec + c;
 			continue;
 		    }
 		    width = 10*width + c;
 		    flags |= FL_WIDTH;
 		    continue;
 		}
 		if (c == '.') {
 		    if (flags & FL_PREC)
 			goto ret;
 		    flags |= FL_PREC;
 		    continue;
 		}
 		if (c == 'l') {
 		    flags |= FL_LONG;
 		    continue;
 		}
 		if (c == 'h')
 		    continue;
 	    }

 	    break;
 	} while ( (c = GETBYTE (stream->flags, __SPGM, fmt)) != 0);

 	/* Only a format character is valid.	*/

 #if	'F' != 'E'+1  ||  'G' != 'F'+1  ||  'f' != 'e'+1  ||  'g' != 'f'+1
 # error
 #endif

 #if PRINTF_LEVEL >= PRINTF_FLT
 	if (c >= 'E' && c <= 'G') {
 	    flags |= FL_FLTUPP;
 	    c += 'e' - 'E';
 	    goto flt_oper;

 	} else if (c >= 'e' && c <= 'g') {

 	    int exp;		/* exponent of master decimal digit	*/
 	    int n;
 	    unsigned char vtype;	/* result of float value parse	*/
 	    unsigned char sign;		/* sign character (or 0)	*/
 # define ndigs	c		/* only for this block, undef is below	*/

 	    flags &= ~FL_FLTUPP;

 	  flt_oper:
 	    if (!(flags & FL_PREC))
 		prec = 6;
 	    flags &= ~(FL_FLTEXP | FL_FLTFIX);
 	    if (c == 'e')
 		flags |= FL_FLTEXP;
 	    else if (c == 'f')
 		flags |= FL_FLTFIX;
 	    else if (prec > 0)
 		prec -= 1;

 	    if (flags & FL_FLTFIX) {
 		vtype = 7;		/* 'prec' arg for 'ftoa_engine'	*/
 		ndigs = prec < 60 ? prec + 1 : 60;
 	    } else {
 		if (prec > 7) prec = 7;
 		vtype = prec;
 		ndigs = 0;
 	    }
 	    exp = __ftoa_engine (va_arg(ap,double), (char *)buf, vtype, ndigs);
 	    vtype = buf[0];

 	    sign = 0;
 	    if ((vtype & FTOA_MINUS) && !(vtype & FTOA_NAN))
 		sign = '-';
 	    else if (flags & FL_PLUS)
 		sign = '+';
 	    else if (flags & FL_SPACE)
 		sign = ' ';

 	    if (vtype & (FTOA_NAN | FTOA_INF)) {
 		const char *p;
 		ndigs = sign ? 4 : 3;
 		if (width > ndigs) {
 		    width -= ndigs;
 		    if (!(flags & FL_LPAD)) {
 			do {
 			    putc (' ', stream);
 			} while (--width);
 		    }
 		} else {
 		    width = 0;
 		}
 		if (sign)
 		    putc (sign, stream);
 		p = PSTR("inf");
 		if (vtype & FTOA_NAN)
 		    p = PSTR("nan");
 # if ('I'-'i' != 'N'-'n') || ('I'-'i' != 'F'-'f') || ('I'-'i' != 'A'-'a')
 #  error
 # endif
 		while ( (ndigs = pgm_read_byte(p)) != 0) {
 		    if (flags & FL_FLTUPP)
 			ndigs += 'I' - 'i';
 		    putc (ndigs, stream);
 		    p++;
 		}
 		goto tail;
 	    }

 	    /* Output format adjustment, number of decimal digits in buf[] */
 	    if (flags & FL_FLTFIX) {
 		ndigs += exp;
 		if ((vtype & FTOA_CARRY) && buf[1] == '1')
 		    ndigs -= 1;
 		if ((signed char)ndigs < 1)
 		    ndigs = 1;
 		else if (ndigs > 8)
 		    ndigs = 8;
 	    } else if (!(flags & FL_FLTEXP)) {		/* 'g(G)' format */
 		if (exp <= prec && exp >= -4)
 		    flags |= FL_FLTFIX;
 		while (prec && buf[1+prec] == '0')
 		    prec--;
 		if (flags & FL_FLTFIX) {
 		    ndigs = prec + 1;		/* number of digits in buf */
 		    prec = prec > exp
 			   ? prec - exp : 0;	/* fractional part length  */
 		}
 	    }

 	    /* Conversion result length, width := free space length	*/
 	    if (flags & FL_FLTFIX)
 		n = (exp>0 ? exp+1 : 1);
 	    else
 		n = 5;		/* 1e+00 */
 	    if (sign) n += 1;
 	    if (prec) n += prec + 1;
 	    width = width > n ? width - n : 0;

 	    /* Output before first digit	*/
 	    if (!(flags & (FL_LPAD | FL_ZFILL))) {
 		while (width) {
 		    putc (' ', stream);
 		    width--;
 		}
 	    }
 	    if (sign) putc (sign, stream);
 	    if (!(flags & FL_LPAD)) {
 		while (width) {
 		    putc ('0', stream);
 		    width--;
 		}
 	    }

 	    if (flags & FL_FLTFIX) {		/* 'f' format		*/

 		n = exp > 0 ? exp : 0;		/* exponent of left digit */
 		do {
 		    if (n == -1)
 			putc ('.', stream);
 		    flags = (n <= exp && n > exp - ndigs)
 			    ? buf[exp - n + 1] : '0';
 		    if (--n < -prec)
 			break;
 		    putc (flags, stream);
 		} while (1);
 		if (n == exp
 		    && (buf[1] > '5'
 		        || (buf[1] == '5' && !(vtype & FTOA_CARRY))) )
 		{
 		    flags = '1';
 		}
 		putc (flags, stream);

 	    } else {				/* 'e(E)' format	*/

 		/* mantissa	*/
 		if (buf[1] != '1')
 		    vtype &= ~FTOA_CARRY;
 		putc (buf[1], stream);
 		if (prec) {
 		    putc ('.', stream);
 		    sign = 2;
 		    do {
 			putc (buf[sign++], stream);
 		    } while (--prec);
 		}

 		/* exponent	*/
 		putc (flags & FL_FLTUPP ? 'E' : 'e', stream);
 		ndigs = '+';
 		if (exp < 0 || (exp == 0 && (vtype & FTOA_CARRY) != 0)) {
 		    exp = -exp;
 		    ndigs = '-';
 		}
 		putc (ndigs, stream);
 		for (ndigs = '0'; exp >= 10; exp -= 10)
 		    ndigs += 1;
 		putc (ndigs, stream);
 		putc ('0' + exp, stream);
 	    }

 	    goto tail;
 # undef ndigs
 	}

 #else		/* to: PRINTF_LEVEL >= PRINTF_FLT */
 	if ((c >= 'E' && c <= 'G') || (c >= 'e' && c <= 'g')) {
 	    (void) va_arg (ap, double);
 	    buf[0] = '?';
 	    goto buf_addr;
 	}

 #endif

 	{
 	    const char * pnt;
 	    size_t size;

 	    switch (c) {

 	      case 'c':
 		buf[0] = va_arg (ap, int);
 #if  PRINTF_LEVEL < PRINTF_FLT
 	      buf_addr:
 #endif
 		pnt = (char *)buf;
 		size = 1;
 		goto no_pgmstring;

 	      case 's':
 		pnt = va_arg (ap, char *);
 		size = strnlen (pnt, (flags & FL_PREC) ? prec : ~0);
 	      no_pgmstring:
 		flags &= ~FL_PGMSTRING;
 		goto str_lpad;

 	      case 'S':
 	        pnt = va_arg (ap, char *);
 		size = strnlen_P (pnt, (flags & FL_PREC) ? prec : ~0);
 		flags |= FL_PGMSTRING;

 	      str_lpad:
 		if (!(flags & FL_LPAD)) {
 		    while (size < width) {
 			putc (' ', stream);
 			width--;
 		    }
 		}
 		while (size) {
 		    putc (GETBYTE (flags, FL_PGMSTRING, pnt), stream);
 		    if (width) width -= 1;
 		    size -= 1;
 		}
 		goto tail;
 	    }
 	}

 	if (c == 'd' || c == 'i') {
 	    long x = (flags & FL_LONG) ? va_arg(ap,long) : va_arg(ap,int);
 	    flags &= ~(FL_NEGATIVE | FL_ALT);
 	    if (x < 0) {
 		x = -x;
 		flags |= FL_NEGATIVE;
 	    }
 	    c = __ultoa_invert (x, (char *)buf, 10) - (char *)buf;

 	} else {
 	    int base;

 	    if (c == 'u') {
 		flags &= ~FL_ALT;
 		base = 10;
 		goto ultoa;
 	    }

 	    flags &= ~(FL_PLUS | FL_SPACE);

 	    switch (c) {
 	      case 'o':
 	        base = 8;
 		goto ultoa;
 	      case 'p':
 	        flags |= FL_ALT;
 		/* no break */
 	      case 'x':
 		if (flags & FL_ALT)
 		    flags |= FL_ALTHEX;
 	        base = 16;
 		goto ultoa;
 	      case 'X':
 		if (flags & FL_ALT)
 		    flags |= (FL_ALTHEX | FL_ALTUPP);
 	        base = 16 | XTOA_UPPER;
 	      ultoa:
 		c = __ultoa_invert ((flags & FL_LONG)
 				    ? va_arg(ap, unsigned long)
 				    : va_arg(ap, unsigned int),
 				    (char *)buf, base)  -  (char *)buf;
 		flags &= ~FL_NEGATIVE;
 		break;

 	      default:
 	        goto ret;
 	    }
 	}

 	{
 	    unsigned char len;

 	    len = c;
 	    if (flags & FL_PREC) {
 		flags &= ~FL_ZFILL;
 		if (len < prec) {
 		    len = prec;
 		    if ((flags & FL_ALT) && !(flags & FL_ALTHEX))
 			flags &= ~FL_ALT;
 		}
 	    }
 	    if (flags & FL_ALT) {
 		if (buf[c-1] == '0') {
 		    flags &= ~(FL_ALT | FL_ALTHEX | FL_ALTUPP);
 		} else {
 		    len += 1;
 		    if (flags & FL_ALTHEX)
 		    	len += 1;
 		}
 	    } else if (flags & (FL_NEGATIVE | FL_PLUS | FL_SPACE)) {
 		len += 1;
 	    }

 	    if (!(flags & FL_LPAD)) {
 		if (flags & FL_ZFILL) {
 		    prec = c;
 		    if (len < width) {
 			prec += width - len;
 			len = width;
 		    }
 		}
 		while (len < width) {
 		    putc (' ', stream);
 		    len++;
 		}
 	    }

 	    width =  (len < width) ? width - len : 0;

 	    if (flags & FL_ALT) {
 		putc ('0', stream);
 		if (flags & FL_ALTHEX)
 		    putc (flags & FL_ALTUPP ? 'X' : 'x', stream);
 	    } else if (flags & (FL_NEGATIVE | FL_PLUS | FL_SPACE)) {
 		unsigned char z = ' ';
 		if (flags & FL_PLUS) z = '+';
 		if (flags & FL_NEGATIVE) z = '-';
 		putc (z, stream);
 	    }

 	    while (prec > c) {
 		putc ('0', stream);
 		prec--;
 	    }

 	    do {
 		putc (buf[--c], stream);
 	    } while (c);
 	}

       tail:
 	/* Tail is possible.	*/
 	while (width) {
 	    putc (' ', stream);
 	    width--;
 	}
     } /* for (;;) */

   ret:
     return stream->len;
 }

 #endif	/* PRINTF_LEVEL > PRINTF_MIN */

 #endif /* !defined(__AVR_TINY__) */
	/* Copyright (c) 2002, Alexander Popov (sasho@vip.bg)
	Copyright (c) 2002,2004,2005 Joerg Wunsch
	Copyright (c) 2005, Helmut Wallner
	Copyright (c) 2007, Dmitry Xmelkov
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	* Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	* 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.
	* Neither the name of the copyright holders nor the names of
	contributors may be used to endorse or promote products derived
	from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
	*/

	/* From: Id: printf_p_new.c,v 1.1.1.9 2002/10/15 20:10:28 joerg_wunsch Exp */
	/* $Id: vfprintf.c 2191 2010-11-05 13:45:57Z arcanum $ */

	#if !defined(__AVR_TINY__)

	#include <avr/pgmspace.h>
	#include <stdarg.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include "sectionname.h"
	#include "stdio_private.h"
	#include "ftoa_engine.h"
	#include "ntz.h"
	#include "xtoa_fast.h"

	/*
	* This file can be compiled into more than one flavour. The default
	* is to offer the usual modifiers and integer formatting support
	* (level 2). Level 1 maintains a minimal version that just offers
	* integer formatting, but no modifier support whatsoever. Level 3 is
	* intented for floating point support.
	*/

	#ifndef PRINTF_LEVEL
	# define PRINTF_LEVEL PRINTF_STD
	#endif

	#if PRINTF_LEVEL == PRINTF_MIN \|\| PRINTF_LEVEL == PRINTF_STD \
	\|\| PRINTF_LEVEL == PRINTF_FLT
	/* OK */
	#else
	# error "Not a known printf level."
	#endif

	#ifndef __AVR_HAVE_LPMX__
	# if defined(__AVR_ENHANCED__) && __AVR_ENHANCED__
	# define __AVR_HAVE_LPMX__ 1
	# endif
	#endif

	#if defined(__AVR_HAVE_LPMX__) && __AVR_HAVE_LPMX__
	# define GETBYTE(flag, mask, pnt) ({ \
	unsigned char __c; \
	asm ( \
	"sbrc %2,%3 \n\t" \
	"lpm %0,Z+ \n\t" \
	"sbrs %2,%3 \n\t" \
	"ld %0,Z+ " \
	: "=r" (__c), \
	"+z" (pnt) \
	: "r" (flag), \
	"I" (ntz(mask)) \
	); \
	__c; \
	})
	#elif 1
	# define GETBYTE(flag, mask, pnt) ({ \
	unsigned char __c; \
	asm ( \
	"sbrc %2,%3 \n\t" \
	"lpm \n\t" \
	"sbrs %2,%3 \n\t" \
	"ld r0,Z \n\t" \
	"adiw r30,1 \n\t" \
	"mov %0,r0 " \
	: "=r" (__c), \
	"+z" (pnt) \
	: "r" (flag), \
	"I" (ntz(mask)) \
	: "r0" \
	); \
	__c; \
	})
	#else
	# define GETBYTE(flag, mask, pnt) ({ \
	unsigned char __c; \
	__c = ((flag) & (mask)) \
	? pgm_read_byte(pnt) : *pnt; \
	pnt++; \
	__c; \
	})
	#endif

	/* -------------------------------------------------------------------- */
	#if PRINTF_LEVEL <= PRINTF_MIN

	#define FL_PGMSTRING 0x01
	#define FL_ALTHEX 0x04
	#define FL_ALT 0x10
	#define FL_ALTLWR 0x20
	#define FL_NEGATIVE 0x40
	#define FL_LONG 0x80

	ATTRIBUTE_CLIB_SECTION
	int
	vfprintf (FILE * stream, const char *fmt, va_list ap)
	{
	unsigned char c; /* holds a char from the format string */
	unsigned char flags;
	unsigned char buf[11]; /* size for -1 in octal, without '\0' */

	stream->len = 0;

	if ((stream->flags & __SWR) == 0)
	return EOF;

	for (;;) {

	for (;;) {
	c = GETBYTE (stream->flags, __SPGM, fmt);
	if (!c) goto ret;
	if (c == '%') {
	c = GETBYTE (stream->flags, __SPGM, fmt);
	if (c != '%') break;
	}
	putc (c, stream);
	}

	for (flags = 0;
	!(flags & FL_LONG); /* 'll' will detect as error */
	c = GETBYTE (stream->flags, __SPGM, fmt))
	{
	if (c && strchr_P (PSTR(" +-.0123456789h"), c))
	continue;
	if (c == '#') {
	flags \|= FL_ALT;
	continue;
	}
	if (c == 'l') {
	flags \|= FL_LONG;
	continue;
	}
	break;
	}

	/* Only a format character is valid. */

	if (c && strchr_P (PSTR("EFGefg"), c)) {
	(void) va_arg (ap, double);
	putc ('?', stream);
	continue;
	}

	{
	const char * pnt;

	switch (c) {

	case 'c':
	putc (va_arg (ap, int), stream);
	continue;

	case 'S':
	flags \|= FL_PGMSTRING;
	/* FALLTHROUGH */

	case 's':
	pnt = va_arg (ap, char *);
	while ( (c = GETBYTE (flags, FL_PGMSTRING, pnt)) != 0)
	putc (c, stream);
	continue;
	}
	}

	if (c == 'd' \|\| c == 'i') {
	long x = (flags & FL_LONG) ? va_arg(ap,long) : va_arg(ap,int);
	flags &= ~FL_ALT;
	if (x < 0) {
	x = -x;
	/* `putc ('-', stream)' will considarably inlarge stack size.
	So flag is used. */
	flags \|= FL_NEGATIVE;
	}
	c = __ultoa_invert (x, (char )buf, 10) - (char )buf;

	} else {
	int base;

	switch (c) {
	case 'u':
	flags &= ~FL_ALT;
	base = 10;
	goto ultoa;
	case 'o':
	base = 8;
	goto ultoa;
	case 'p':
	flags \|= FL_ALT;
	/* no break */
	case 'x':
	flags \|= (FL_ALTHEX \| FL_ALTLWR);
	base = 16;
	goto ultoa;
	case 'X':
	flags \|= FL_ALTHEX;
	base = 16 \| XTOA_UPPER;
	ultoa:
	c = __ultoa_invert ((flags & FL_LONG)
	? va_arg(ap, unsigned long)
	: va_arg(ap, unsigned int),
	(char )buf, base) - (char )buf;
	break;

	default:
	goto ret;
	}
	}

	/* Integer number output. */
	if (flags & FL_NEGATIVE)
	putc ('-', stream);
	if ((flags & FL_ALT) && (buf[c-1] != '0')) {
	putc ('0', stream);
	if (flags & FL_ALTHEX)
	#if FL_ALTLWR != 'x' - 'X'
	# error
	#endif
	putc ('X' + (flags & FL_ALTLWR), stream);
	}
	do {
	putc (buf[--c], stream);
	} while (c);

	} /* for (;;) */

	ret:
	return stream->len;
	}

	/* -------------------------------------------------------------------- */
	#else /* i.e. PRINTF_LEVEL > PRINTF_MIN */

	#define FL_ZFILL 0x01
	#define FL_PLUS 0x02
	#define FL_SPACE 0x04
	#define FL_LPAD 0x08
	#define FL_ALT 0x10
	#define FL_WIDTH 0x20
	#define FL_PREC 0x40
	#define FL_LONG 0x80

	#define FL_PGMSTRING FL_LONG
	#define FL_NEGATIVE FL_LONG

	#define FL_ALTUPP FL_PLUS
	#define FL_ALTHEX FL_SPACE

	#define FL_FLTUPP FL_ALT
	#define FL_FLTEXP FL_PREC
	#define FL_FLTFIX FL_LONG

	ATTRIBUTE_CLIB_SECTION
	int vfprintf (FILE * stream, const char *fmt, va_list ap)
	{
	unsigned char c; /* holds a char from the format string */
	unsigned char flags;
	unsigned char width;
	unsigned char prec;
	unsigned char buf[11]; /* size for -1 in octal, without '\0' */

	stream->len = 0;

	if ((stream->flags & __SWR) == 0)
	return EOF;

	for (;;) {

	for (;;) {
	c = GETBYTE (stream->flags, __SPGM, fmt);
	if (!c) goto ret;
	if (c == '%') {
	c = GETBYTE (stream->flags, __SPGM, fmt);
	if (c != '%') break;
	}
	putc (c, stream);
	}

	flags = 0;
	width = 0;
	prec = 0;

	do {
	if (flags < FL_WIDTH) {
	switch (c) {
	case '0':
	flags \|= FL_ZFILL;
	continue;
	case '+':
	flags \|= FL_PLUS;
	/* FALLTHROUGH */
	case ' ':
	flags \|= FL_SPACE;
	continue;
	case '-':
	flags \|= FL_LPAD;
	continue;
	case '#':
	flags \|= FL_ALT;
	continue;
	}
	}

	if (flags < FL_LONG) {
	if (c >= '0' && c <= '9') {
	c -= '0';
	if (flags & FL_PREC) {
	prec = 10*prec + c;
	continue;
	}
	width = 10*width + c;
	flags \|= FL_WIDTH;
	continue;
	}
	if (c == '.') {
	if (flags & FL_PREC)
	goto ret;
	flags \|= FL_PREC;
	continue;
	}
	if (c == 'l') {
	flags \|= FL_LONG;
	continue;
	}
	if (c == 'h')
	continue;
	}

	break;
	} while ( (c = GETBYTE (stream->flags, __SPGM, fmt)) != 0);

	/* Only a format character is valid. */

	#if 'F' != 'E'+1 \|\| 'G' != 'F'+1 \|\| 'f' != 'e'+1 \|\| 'g' != 'f'+1
	# error
	#endif

	#if PRINTF_LEVEL >= PRINTF_FLT
	if (c >= 'E' && c <= 'G') {
	flags \|= FL_FLTUPP;
	c += 'e' - 'E';
	goto flt_oper;

	} else if (c >= 'e' && c <= 'g') {

	int exp; /* exponent of master decimal digit */
	int n;
	unsigned char vtype; /* result of float value parse */
	unsigned char sign; /* sign character (or 0) */
	# define ndigs c /* only for this block, undef is below */

	flags &= ~FL_FLTUPP;

	flt_oper:
	if (!(flags & FL_PREC))
	prec = 6;
	flags &= ~(FL_FLTEXP \| FL_FLTFIX);
	if (c == 'e')
	flags \|= FL_FLTEXP;
	else if (c == 'f')
	flags \|= FL_FLTFIX;
	else if (prec > 0)
	prec -= 1;

	if (flags & FL_FLTFIX) {
	vtype = 7; /* 'prec' arg for 'ftoa_engine' */
	ndigs = prec < 60 ? prec + 1 : 60;
	} else {
	if (prec > 7) prec = 7;
	vtype = prec;
	ndigs = 0;
	}
	exp = __ftoa_engine (va_arg(ap,double), (char *)buf, vtype, ndigs);
	vtype = buf[0];

	sign = 0;
	if ((vtype & FTOA_MINUS) && !(vtype & FTOA_NAN))
	sign = '-';
	else if (flags & FL_PLUS)
	sign = '+';
	else if (flags & FL_SPACE)
	sign = ' ';

	if (vtype & (FTOA_NAN \| FTOA_INF)) {
	const char *p;
	ndigs = sign ? 4 : 3;
	if (width > ndigs) {
	width -= ndigs;
	if (!(flags & FL_LPAD)) {
	do {
	putc (' ', stream);
	} while (--width);
	}
	} else {
	width = 0;
	}
	if (sign)
	putc (sign, stream);
	p = PSTR("inf");
	if (vtype & FTOA_NAN)
	p = PSTR("nan");
	# if ('I'-'i' != 'N'-'n') \|\| ('I'-'i' != 'F'-'f') \|\| ('I'-'i' != 'A'-'a')
	# error
	# endif
	while ( (ndigs = pgm_read_byte(p)) != 0) {
	if (flags & FL_FLTUPP)
	ndigs += 'I' - 'i';
	putc (ndigs, stream);
	p++;
	}
	goto tail;
	}

	/* Output format adjustment, number of decimal digits in buf[] */
	if (flags & FL_FLTFIX) {
	ndigs += exp;
	if ((vtype & FTOA_CARRY) && buf[1] == '1')
	ndigs -= 1;
	if ((signed char)ndigs < 1)
	ndigs = 1;
	else if (ndigs > 8)
	ndigs = 8;
	} else if (!(flags & FL_FLTEXP)) { /* 'g(G)' format */
	if (exp <= prec && exp >= -4)
	flags \|= FL_FLTFIX;
	while (prec && buf[1+prec] == '0')
	prec--;
	if (flags & FL_FLTFIX) {
	ndigs = prec + 1; /* number of digits in buf */
	prec = prec > exp
	? prec - exp : 0; /* fractional part length */
	}
	}

	/* Conversion result length, width := free space length */
	if (flags & FL_FLTFIX)
	n = (exp>0 ? exp+1 : 1);
	else
	n = 5; /* 1e+00 */
	if (sign) n += 1;
	if (prec) n += prec + 1;
	width = width > n ? width - n : 0;

	/* Output before first digit */
	if (!(flags & (FL_LPAD \| FL_ZFILL))) {
	while (width) {
	putc (' ', stream);
	width--;
	}
	}
	if (sign) putc (sign, stream);
	if (!(flags & FL_LPAD)) {
	while (width) {
	putc ('0', stream);
	width--;
	}
	}

	if (flags & FL_FLTFIX) { /* 'f' format */

	n = exp > 0 ? exp : 0; /* exponent of left digit */
	do {
	if (n == -1)
	putc ('.', stream);
	flags = (n <= exp && n > exp - ndigs)
	? buf[exp - n + 1] : '0';
	if (--n < -prec)
	break;
	putc (flags, stream);
	} while (1);
	if (n == exp
	&& (buf[1] > '5'
	\|\| (buf[1] == '5' && !(vtype & FTOA_CARRY))) )
	{
	flags = '1';
	}
	putc (flags, stream);

	} else { /* 'e(E)' format */

	/* mantissa */
	if (buf[1] != '1')
	vtype &= ~FTOA_CARRY;
	putc (buf[1], stream);
	if (prec) {
	putc ('.', stream);
	sign = 2;
	do {
	putc (buf[sign++], stream);
	} while (--prec);
	}

	/* exponent */
	putc (flags & FL_FLTUPP ? 'E' : 'e', stream);
	ndigs = '+';
	if (exp < 0 \|\| (exp == 0 && (vtype & FTOA_CARRY) != 0)) {
	exp = -exp;
	ndigs = '-';
	}
	putc (ndigs, stream);
	for (ndigs = '0'; exp >= 10; exp -= 10)
	ndigs += 1;
	putc (ndigs, stream);
	putc ('0' + exp, stream);
	}

	goto tail;
	# undef ndigs
	}

	#else /* to: PRINTF_LEVEL >= PRINTF_FLT */
	if ((c >= 'E' && c <= 'G') \|\| (c >= 'e' && c <= 'g')) {
	(void) va_arg (ap, double);
	buf[0] = '?';
	goto buf_addr;
	}

	#endif

	{
	const char * pnt;
	size_t size;

	switch (c) {

	case 'c':
	buf[0] = va_arg (ap, int);
	#if PRINTF_LEVEL < PRINTF_FLT
	buf_addr:
	#endif
	pnt = (char *)buf;
	size = 1;
	goto no_pgmstring;

	case 's':
	pnt = va_arg (ap, char *);
	size = strnlen (pnt, (flags & FL_PREC) ? prec : ~0);
	no_pgmstring:
	flags &= ~FL_PGMSTRING;
	goto str_lpad;

	case 'S':
	pnt = va_arg (ap, char *);
	size = strnlen_P (pnt, (flags & FL_PREC) ? prec : ~0);
	flags \|= FL_PGMSTRING;

	str_lpad:
	if (!(flags & FL_LPAD)) {
	while (size < width) {
	putc (' ', stream);
	width--;
	}
	}
	while (size) {
	putc (GETBYTE (flags, FL_PGMSTRING, pnt), stream);
	if (width) width -= 1;
	size -= 1;
	}
	goto tail;
	}
	}

	if (c == 'd' \|\| c == 'i') {
	long x = (flags & FL_LONG) ? va_arg(ap,long) : va_arg(ap,int);
	flags &= ~(FL_NEGATIVE \| FL_ALT);
	if (x < 0) {
	x = -x;
	flags \|= FL_NEGATIVE;
	}
	c = __ultoa_invert (x, (char )buf, 10) - (char )buf;

	} else {
	int base;

	if (c == 'u') {
	flags &= ~FL_ALT;
	base = 10;
	goto ultoa;
	}

	flags &= ~(FL_PLUS \| FL_SPACE);

	switch (c) {
	case 'o':
	base = 8;
	goto ultoa;
	case 'p':
	flags \|= FL_ALT;
	/* no break */
	case 'x':
	if (flags & FL_ALT)
	flags \|= FL_ALTHEX;
	base = 16;
	goto ultoa;
	case 'X':
	if (flags & FL_ALT)
	flags \|= (FL_ALTHEX \| FL_ALTUPP);
	base = 16 \| XTOA_UPPER;
	ultoa:
	c = __ultoa_invert ((flags & FL_LONG)
	? va_arg(ap, unsigned long)
	: va_arg(ap, unsigned int),
	(char )buf, base) - (char )buf;
	flags &= ~FL_NEGATIVE;
	break;

	default:
	goto ret;
	}
	}

	{
	unsigned char len;

	len = c;
	if (flags & FL_PREC) {
	flags &= ~FL_ZFILL;
	if (len < prec) {
	len = prec;
	if ((flags & FL_ALT) && !(flags & FL_ALTHEX))
	flags &= ~FL_ALT;
	}
	}
	if (flags & FL_ALT) {
	if (buf[c-1] == '0') {
	flags &= ~(FL_ALT \| FL_ALTHEX \| FL_ALTUPP);
	} else {
	len += 1;
	if (flags & FL_ALTHEX)
	len += 1;
	}
	} else if (flags & (FL_NEGATIVE \| FL_PLUS \| FL_SPACE)) {
	len += 1;
	}

	if (!(flags & FL_LPAD)) {
	if (flags & FL_ZFILL) {
	prec = c;
	if (len < width) {
	prec += width - len;
	len = width;
	}
	}
	while (len < width) {
	putc (' ', stream);
	len++;
	}
	}

	width = (len < width) ? width - len : 0;

	if (flags & FL_ALT) {
	putc ('0', stream);
	if (flags & FL_ALTHEX)
	putc (flags & FL_ALTUPP ? 'X' : 'x', stream);
	} else if (flags & (FL_NEGATIVE \| FL_PLUS \| FL_SPACE)) {
	unsigned char z = ' ';
	if (flags & FL_PLUS) z = '+';
	if (flags & FL_NEGATIVE) z = '-';
	putc (z, stream);
	}

	while (prec > c) {
	putc ('0', stream);
	prec--;
	}

	do {
	putc (buf[--c], stream);
	} while (c);
	}

	tail:
	/* Tail is possible. */
	while (width) {
	putc (' ', stream);
	width--;
	}
	} /* for (;;) */

	ret:
	return stream->len;
	}

	#endif /* PRINTF_LEVEL > PRINTF_MIN */

	#endif /* !defined(__AVR_TINY__) */