Update.

1999-03-09  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>

	* stdio-common/printf_fphex.c: Move to ...
	* sysdeps/generic/printf_fphex.c: ... here.  Fix exponent of
	extended precision number.
	* sysdeps/m68k/printf_fphex.c: New file.

1999-03-09  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>

	* manual/stdio.texi: Fix typos.

1 files changed, 464 insertions, 0 deletions

diff --git a/sysdeps/generic/printf_fphex.c b/sysdeps/generic/printf_fphex.c
new file mode 100644
index 0000000000..00dd8eed1d
--- /dev/null
+++ b/sysdeps/generic/printf_fphex.c
@@ -0,0 +1,464 @@
+/* Print floating point number in hexadecimal notation according to
+   ISO C 9X.
+   Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <ctype.h>
+#include <ieee754.h>
+#include <math.h>
+#include <printf.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+#include "_itoa.h"
+#include <locale/localeinfo.h>
+
+/* #define NDEBUG 1*/		/* Undefine this for debugging assertions.  */
+#include <assert.h>
+
+/* This defines make it possible to use the same code for GNU C library and
+   the GNU I/O library.	 */
+#ifdef USE_IN_LIBIO
+# include <libioP.h>
+# define PUT(f, s, n) _IO_sputn (f, s, n)
+# define PAD(f, c, n) _IO_padn (f, c, n)
+/* We use this file GNU C library and GNU I/O library.	So make
+   names equal.	 */
+# undef putc
+# define putc(c, f) _IO_putc_unlocked (c, f)
+# define size_t     _IO_size_t
+# define FILE	     _IO_FILE
+#else	/* ! USE_IN_LIBIO */
+# define PUT(f, s, n) fwrite (s, 1, n, f)
+# define PAD(f, c, n) __printf_pad (f, c, n)
+ssize_t __printf_pad __P ((FILE *, char pad, int n)); /* In vfprintf.c.  */
+#endif	/* USE_IN_LIBIO */
+
+/* Macros for doing the actual output.  */
+
+#define outchar(ch)							      \
+  do									      \
+    {									      \
+      register const int outc = (ch);					      \
+      if (putc (outc, fp) == EOF)					      \
+	return -1;							      \
+      ++done;								      \
+    } while (0)
+
+#define PRINT(ptr, len)							      \
+  do									      \
+    {									      \
+       int outlen = (len);						      \
+       const char *cp = (ptr);						      \
+       while (outlen-- > 0)						      \
+	 outchar (*cp++);						      \
+    } while (0)
+
+#define PADN(ch, len)							      \
+  do									      \
+    {									      \
+      if (PAD (fp, ch, len) != len)					      \
+	return -1;							      \
+      done += len;							      \
+    }									      \
+  while (0)
+
+#ifndef MIN
+# define MIN(a,b) ((a)<(b)?(a):(b))
+#endif
+
+
+int
+__printf_fphex (FILE *fp,
+		const struct printf_info *info,
+		const void *const *args)
+{
+  /* The floating-point value to output.  */
+  union
+    {
+      union ieee754_double dbl;
+      union ieee854_long_double ldbl;
+    }
+  fpnum;
+
+  /* Locale-dependent representation of decimal point.	*/
+  wchar_t decimal;
+
+  /* "NaN" or "Inf" for the special cases.  */
+  const char *special = NULL;
+
+  /* Buffer for the generated number string for the mantissa.  The
+     maximal size for the mantissa is 64 bits.  */
+  char numbuf[16];
+  char *numstr;
+  char *numend;
+  int negative;
+
+  /* The maximal exponent of two in decimal notation has 5 digits.  */
+  char expbuf[5];
+  char *expstr;
+  int expnegative;
+  int exponent;
+
+  /* Non-zero is mantissa is zero.  */
+  int zero_mantissa;
+
+  /* The leading digit before the decimal point.  */
+  char leading;
+
+  /* Precision.  */
+  int precision = info->prec;
+
+  /* Width.  */
+  int width = info->width;
+
+  /* Number of characters written.  */
+  int done = 0;
+
+
+  /* Figure out the decimal point character.  */
+  if (info->extra == 0)
+    {
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (state));
+      if (__mbrtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT),
+		     strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT)),
+		     &state) <= 0)
+	decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT);
+    }
+  else
+    {
+      mbstate_t state;
+
+      memset (&state, '\0', sizeof (state));
+      if (__mbrtowc (&decimal, _NL_CURRENT (LC_MONETARY, MON_DECIMAL_POINT),
+		     strlen (_NL_CURRENT (LC_MONETARY, MON_DECIMAL_POINT)),
+		     &state) <= 0)
+	decimal = (wchar_t) *_NL_CURRENT (LC_MONETARY, MON_DECIMAL_POINT);
+    }
+  /* Give default value.  */
+  if (decimal == L'\0')
+    decimal = L'.';
+
+
+  /* Fetch the argument value.	*/
+#ifndef __NO_LONG_DOUBLE_MATH
+  if (info->is_long_double && sizeof (long double) > sizeof (double))
+    {
+      fpnum.ldbl.d = *(const long double *) args[0];
+
+      /* Check for special values: not a number or infinity.  */
+      if (__isnanl (fpnum.ldbl.d))
+	{
+	  special = isupper (info->spec) ? "NAN" : "nan";
+	  negative = 0;
+	}
+      else
+	{
+	  if (__isinfl (fpnum.ldbl.d))
+	    special = isupper (info->spec) ? "INF" : "inf";
+
+	  negative = signbit (fpnum.ldbl.d);
+	}
+    }
+  else
+#endif	/* no long double */
+    {
+      fpnum.dbl.d = *(const double *) args[0];
+
+      /* Check for special values: not a number or infinity.  */
+      if (__isnan (fpnum.dbl.d))
+	{
+	  special = isupper (info->spec) ? "NAN" : "nan";
+	  negative = 0;
+	}
+      else
+	{
+	  if (__isinf (fpnum.dbl.d))
+	    special = isupper (info->spec) ? "INF" : "inf";
+
+	  negative = signbit (fpnum.dbl.d);
+	}
+    }
+
+  if (special)
+    {
+      int width = info->width;
+
+      if (negative || info->showsign || info->space)
+	--width;
+      width -= 3;
+
+      if (!info->left && width > 0)
+	PADN (' ', width);
+
+      if (negative)
+	outchar ('-');
+      else if (info->showsign)
+	outchar ('+');
+      else if (info->space)
+	outchar (' ');
+
+      PRINT (special, 3);
+
+      if (info->left && width > 0)
+	PADN (' ', width);
+
+      return done;
+    }
+
+  /* We are handling here only 64 and 80 bit IEEE foating point
+     numbers.  */
+  if (info->is_long_double == 0 || sizeof (double) == sizeof (long double))
+    {
+      /* We have 52 bits of mantissa plus one implicit digit.  Since
+	 52 bits are representable without rest using hexadecimal
+	 digits we use only the implicit digits for the number before
+	 the decimal point.  */
+      unsigned long long int num;
+
+      num = (((unsigned long long int) fpnum.dbl.ieee.mantissa0) << 32
+	     | fpnum.dbl.ieee.mantissa1);
+
+      zero_mantissa = num == 0;
+
+      if (sizeof (unsigned long int) > 6)
+	numstr = _itoa_word (num, numbuf + sizeof numbuf, 16,
+			     info->spec == 'A');
+      else
+	numstr = _itoa (num, numbuf + sizeof numbuf, 16,
+			info->spec == 'A');
+
+      /* Fill with zeroes.  */
+      while (numstr > numbuf + (sizeof numbuf - 52 / 4))
+	*--numstr = '0';
+
+      leading = fpnum.dbl.ieee.exponent == 0 ? '0' : '1';
+
+      exponent = fpnum.dbl.ieee.exponent;
+
+      if (exponent == 0)
+	{
+	  if (zero_mantissa)
+	    expnegative = 0;
+	  else
+	    {
+	      /* This is a denormalized number.  */
+	      expnegative = 1;
+	      exponent = IEEE754_DOUBLE_BIAS - 1;
+	    }
+	}
+      else if (exponent >= IEEE754_DOUBLE_BIAS)
+	{
+	  expnegative = 0;
+	  exponent -= IEEE754_DOUBLE_BIAS;
+	}
+      else
+	{
+	  expnegative = 1;
+	  exponent = -(exponent - IEEE754_DOUBLE_BIAS);
+	}
+    }
+  else
+    {
+      /* The "strange" 80 bit format on ix86 and m68k has an explicit
+	 leading digit in the 64 bit mantissa.  */
+      unsigned long long int num;
+
+      assert (sizeof (long double) == 12);
+
+      num = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32
+	     | fpnum.ldbl.ieee.mantissa1);
+
+      zero_mantissa = num == 0;
+
+      if (sizeof (unsigned long int) > 6)
+	numstr = _itoa_word (num, numbuf + sizeof numbuf, 16,
+			     info->spec == 'A');
+      else
+	numstr = _itoa (num, numbuf + sizeof numbuf, 16, info->spec == 'A');
+
+      /* Fill with zeroes.  */
+      while (numstr > numbuf + (sizeof numbuf - 64 / 4))
+	*--numstr = '0';
+
+      /* We use a full nibble for the leading digit.  */
+      leading = *numstr++;
+
+      /* We have 3 bits from the mantissa in the leading nibble.
+	 Therefore we are here using `IEEE854_LONG_DOUBLE_BIAS + 3'.  */
+      exponent = fpnum.ldbl.ieee.exponent;
+
+      if (exponent == 0)
+	{
+	  if (zero_mantissa)
+	    expnegative = 0;
+	  else
+	    {
+	      /* This is a denormalized number.  */
+	      expnegative = 1;
+	      /* This is a hook for the m68k long double format, where the
+		 exponent bias is the same for normalized and denormalized
+		 numbers.  */
+#ifndef LONG_DOUBLE_DENORM_BIAS
+# define LONG_DOUBLE_DENORM_BIAS (IEEE854_LONG_DOUBLE_BIAS - 1)
+#endif
+	      exponent = LONG_DOUBLE_DENORM_BIAS + 3;
+	    }
+	}
+      else if (exponent >= IEEE854_LONG_DOUBLE_BIAS + 3)
+	{
+	  expnegative = 0;
+	  exponent -= IEEE854_LONG_DOUBLE_BIAS + 3;
+	}
+      else
+	{
+	  expnegative = 1;
+	  exponent = -(exponent - (IEEE854_LONG_DOUBLE_BIAS + 3));
+	}
+    }
+
+  /* Look for trailing zeroes.  */
+  if (! zero_mantissa)
+    {
+      numend = numbuf + sizeof numbuf;
+      while (numend[-1] == '0')
+	--numend;
+
+      if (precision == -1)
+	precision = numend - numstr;
+      else if (precision < numend - numstr
+	       && (numstr[precision] > '8'
+		   || (('A' < '0' || 'a' < '0')
+		       && numstr[precision] < '0')
+		   || (numstr[precision] == '8'
+		       && (precision + 1 < numend - numstr
+			   /* Round to even.  */
+			   || (precision > 0
+			       && ((numstr[precision - 1] & 1)
+				   ^ (isdigit (numstr[precision - 1]) == 0)))
+			   || (precision == 0
+			       && ((leading & 1)
+				   ^ (isdigit (leading) == 0)))))))
+	{
+	  /* Round up.  */
+	  int cnt = precision;
+	  while (--cnt >= 0)
+	    {
+	      char ch = numstr[cnt];
+	      /* We assume that the digits and the letters are ordered
+		 like in ASCII.  This is true for the rest of GNU, too.  */
+	      if (ch == '9')
+		{
+		  numstr[cnt] = info->spec;	/* This is tricky,
+						   think about it!  */
+		  break;
+		}
+	      else if (tolower (ch) < 'f')
+		{
+		  ++numstr[cnt];
+		  break;
+		}
+	      else
+		numstr[cnt] = '0';
+	    }
+	  if (cnt < 0)
+	    {
+	      /* The mantissa so far was fff...f  Now increment the
+		 leading digit.  Here it is again possible that we
+		 get an overflow.  */
+	      if (leading == '9')
+		leading = info->spec;
+	      else if (tolower (leading) < 'f')
+		++leading;
+	      else
+		{
+		  leading = 1;
+		  if (expnegative)
+		    {
+		      exponent += 4;
+		      if (exponent >= 0)
+			expnegative = 0;
+		    }
+		  else
+		    exponent += 4;
+		}
+	    }
+	}
+    }
+  else
+    numend = numstr;
+
+  /* Now we can compute the exponent string.  */
+  expstr = _itoa_word (exponent, expbuf + sizeof expbuf, 10, 0);
+
+  /* Now we have all information to compute the size.  */
+  width -= ((negative || info->showsign || info->space)
+	    /* Sign.  */
+	    + 2    + 1 + 1 + precision + 1 + 1
+	    /* 0x    h   .   hhh         P   ExpoSign.  */
+	    + ((expbuf + sizeof expbuf) - expstr));
+	    /* Exponent.  */
+
+  /* A special case when the mantissa or the precision is zero and the `#'
+     is not given.  In this case we must not print the decimal point.  */
+  if ((zero_mantissa || precision == 0) && !info->alt)
+    ++width;		/* This nihilates the +1 for the decimal-point
+			   character in the following equation.  */
+
+  if (!info->left && width > 0)
+    PADN (' ', width);
+
+  if (negative)
+    outchar ('-');
+  else if (info->showsign)
+    outchar ('+');
+  else if (info->space)
+    outchar (' ');
+
+  outchar ('0');
+  outchar (info->spec == 'A' ? 'X' : 'x');
+  outchar (leading);
+
+  if ((!zero_mantissa && precision > 0) || info->alt)
+    outchar (decimal);
+
+  if (!zero_mantissa && precision > 0)
+    {
+      PRINT (numstr, MIN (numend - numstr, precision));
+      if (precision > numend - numstr)
+	PADN ('0', precision - (numend - numstr));
+    }
+
+  if (info->left && info->pad == '0' && width > 0)
+    PADN ('0', width);
+
+  outchar (info->spec == 'A' ? 'P' : 'p');
+
+  outchar (expnegative ? '-' : '+');
+
+  PRINT (expstr, (expbuf + sizeof expbuf) - expstr);
+
+  if (info->left && info->pad != '0' && width > 0)
+    PADN (info->pad, width);
+
+  return done;
+}