0cb6b293e034b1cf1c52d19f333a33597f5d4eea
[kopensolaris-gnu/glibc.git] / sysdeps / ieee754 / ldbl-128 / printf_fphex.c
1 /* Print floating point number in hexadecimal notation according to
2    ISO C99.
3    Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
4    This file is part of the GNU C Library.
5
6    The GNU C Library is free software; you can redistribute it and/or
7    modify it under the terms of the GNU Lesser General Public
8    License as published by the Free Software Foundation; either
9    version 2.1 of the License, or (at your option) any later version.
10
11    The GNU C Library is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14    Lesser General Public License for more details.
15
16    You should have received a copy of the GNU Lesser General Public
17    License along with the GNU C Library; if not, write to the Free
18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19    02111-1307 USA.  */
20
21 #define PRINT_FPHEX_LONG_DOUBLE \
22 do {                                                                          \
23       /* We have 112 bits of mantissa plus one implicit digit.  Since         \
24          112 bits are representable without rest using hexadecimal            \
25          digits we use only the implicit digits for the number before         \
26          the decimal point.  */                                               \
27       unsigned long long int num0, num1;                                      \
28                                                                               \
29       assert (sizeof (long double) == 16);                                    \
30                                                                               \
31       num0 = (((unsigned long long int) fpnum.ldbl.ieee.mantissa0) << 32      \
32              | fpnum.ldbl.ieee.mantissa1);                                    \
33       num1 = (((unsigned long long int) fpnum.ldbl.ieee.mantissa2) << 32      \
34              | fpnum.ldbl.ieee.mantissa3);                                    \
35                                                                               \
36       zero_mantissa = (num0|num1) == 0;                                       \
37                                                                               \
38       if (sizeof (unsigned long int) > 6)                                     \
39         {                                                                     \
40           numstr = _itoa_word (num1, numbuf + sizeof numbuf, 16,              \
41                                info->spec == 'A');                            \
42           wnumstr = _itowa_word (num1,                                        \
43                                  wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),\
44                                  16, info->spec == 'A');                      \
45         }                                                                     \
46       else                                                                    \
47         {                                                                     \
48           numstr = _itoa (num1, numbuf + sizeof numbuf, 16,                   \
49                           info->spec == 'A');                                 \
50           wnumstr = _itowa (num1,                                             \
51                             wnumbuf + sizeof (wnumbuf) / sizeof (wchar_t),    \
52                             16, info->spec == 'A');                           \
53         }                                                                     \
54                                                                               \
55       while (numstr > numbuf + (sizeof numbuf - 64 / 4))                      \
56         {                                                                     \
57           *--numstr = '0';                                                    \
58           *--wnumstr = L'0';                                                  \
59         }                                                                     \
60                                                                               \
61       if (sizeof (unsigned long int) > 6)                                     \
62         {                                                                     \
63           numstr = _itoa_word (num0, numstr, 16, info->spec == 'A');          \
64           wnumstr = _itowa_word (num0, wnumstr, 16, info->spec == 'A');       \
65         }                                                                     \
66       else                                                                    \
67         {                                                                     \
68           numstr = _itoa (num0, numstr, 16, info->spec == 'A');               \
69           wnumstr = _itowa (num0, wnumstr, 16, info->spec == 'A');            \
70         }                                                                     \
71                                                                               \
72       /* Fill with zeroes.  */                                                \
73       while (numstr > numbuf + (sizeof numbuf - 112 / 4))                     \
74         {                                                                     \
75           *--numstr = '0';                                                    \
76           *--wnumstr = L'0';                                                  \
77         }                                                                     \
78                                                                               \
79       leading = fpnum.ldbl.ieee.exponent == 0 ? '0' : '1';                    \
80                                                                               \
81       exponent = fpnum.ldbl.ieee.exponent;                                    \
82                                                                               \
83       if (exponent == 0)                                                      \
84         {                                                                     \
85           if (zero_mantissa)                                                  \
86             expnegative = 0;                                                  \
87           else                                                                \
88             {                                                                 \
89               /* This is a denormalized number.  */                           \
90               expnegative = 1;                                                \
91               exponent = IEEE854_LONG_DOUBLE_BIAS - 1;                        \
92             }                                                                 \
93         }                                                                     \
94       else if (exponent >= IEEE854_LONG_DOUBLE_BIAS)                          \
95         {                                                                     \
96           expnegative = 0;                                                    \
97           exponent -= IEEE854_LONG_DOUBLE_BIAS;                               \
98         }                                                                     \
99       else                                                                    \
100         {                                                                     \
101           expnegative = 1;                                                    \
102           exponent = -(exponent - IEEE854_LONG_DOUBLE_BIAS);                  \
103         }                                                                     \
104 } while (0)
105
106 #include <sysdeps/generic/printf_fphex.c>