1 /* Print size value using units for orders of magnitude.
2 Copyright (C) 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5 Based on a proposal by Larry McVoy <lm@sgi.com>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
33 /* This defines make it possible to use the same code for GNU C library and
34 the GNU I/O library. */
36 # define PUT(f, s, n) _IO_sputn (f, s, n)
37 # define PAD(f, c, n) _IO_padn (f, c, n)
38 /* We use this file GNU C library and GNU I/O library. So make
41 # define putc(c, f) _IO_putc_unlocked (c, f)
42 # define size_t _IO_size_t
43 # define FILE _IO_FILE
44 #else /* ! USE_IN_LIBIO */
45 # define PUT(f, s, n) fwrite (s, 1, n, f)
46 # define PAD(f, c, n) __printf_pad (f, c, n)
47 ssize_t __printf_pad
__P ((FILE *, char pad
, int n
)); /* In vfprintf.c. */
48 #endif /* USE_IN_LIBIO */
50 /* Macros for doing the actual output. */
55 register const int outc = (ch); \
56 if (putc (outc, fp) == EOF) \
61 #define PRINT(ptr, len) \
64 register size_t outlen = (len); \
67 if (PUT (fp, ptr, outlen) != outlen) \
74 while (outlen-- > 0) \
79 #define PADN(ch, len) \
82 if (PAD (fp, ch, len) != len) \
88 /* Prototype for helper functions. */
89 extern int __printf_fp (FILE *fp
, const struct printf_info
*info
,
90 const void *const *args
);
94 printf_size (FILE *fp
, const struct printf_info
*info
, const void *const *args
)
96 /* Units for the both formats. */
97 #define BINARY_UNITS " kmgtpezy"
98 #define DECIMAL_UNITS " KMGTPEZY"
99 static const char units
[2][sizeof (BINARY_UNITS
)] =
101 BINARY_UNITS
, /* For binary format. */
102 DECIMAL_UNITS
/* For decimal format. */
104 const char *tag
= units
[isupper (info
->spec
) != 0];
105 int divisor
= isupper (info
->spec
) ? 1000 : 1024;
107 /* The floating-point value to output. */
110 union ieee754_double dbl
;
111 union ieee854_long_double ldbl
;
114 const void *ptr
= &fpnum
;
118 /* "NaN" or "Inf" for the special cases. */
119 const char *special
= NULL
;
121 struct printf_info fp_info
;
125 /* Fetch the argument value. */
126 if (info
->is_long_double
&& sizeof (long double) > sizeof (double))
128 fpnum
.ldbl
.d
= *(const long double *) args
[0];
130 /* Check for special values: not a number or infinity. */
131 if (__isnanl (fpnum
.ldbl
.d
))
136 else if (__isinfl (fpnum
.ldbl
.d
))
140 negative
= fpnum
.ldbl
.d
< 0;
143 while (fpnum
.ldbl
.d
>= divisor
&& tag
[1] != '\0')
145 fpnum
.ldbl
.d
/= divisor
;
151 fpnum
.dbl
.d
= *(const double *) args
[0];
153 /* Check for special values: not a number or infinity. */
154 if (__isnan (fpnum
.dbl
.d
))
159 else if (__isinf (fpnum
.dbl
.d
))
163 negative
= fpnum
.dbl
.d
< 0;
166 while (fpnum
.dbl
.d
>= divisor
&& tag
[1] != '\0')
168 fpnum
.dbl
.d
/= divisor
;
175 int width
= info
->prec
> info
->width
? info
->prec
: info
->width
;
177 if (negative
|| info
->showsign
|| info
->space
)
181 if (!info
->left
&& width
> 0)
186 else if (info
->showsign
)
188 else if (info
->space
)
193 if (info
->left
&& width
> 0)
199 /* Prepare to print the number. We want to use `__printf_fp' so we
200 have to prepare a `printf_info' structure. */
202 fp_info
.prec
= info
->prec
< 0 ? 3 : info
->prec
;
203 fp_info
.is_long_double
= info
->is_long_double
;
204 fp_info
.is_short
= info
->is_short
;
205 fp_info
.is_long
= info
->is_long
;
206 fp_info
.alt
= info
->alt
;
207 fp_info
.space
= info
->space
;
208 fp_info
.left
= info
->left
;
209 fp_info
.showsign
= info
->showsign
;
210 fp_info
.group
= info
->group
;
211 fp_info
.extra
= info
->extra
;
212 fp_info
.pad
= info
->pad
;
214 if (fp_info
.left
&& fp_info
.pad
== L
' ')
216 /* We must do the padding ourself since the unit character must
217 be placed before the padding spaces. */
220 done
= __printf_fp (fp
, &fp_info
, &ptr
);
224 if (info
->width
> done
)
225 PADN (' ', info
->width
- done
);
230 /* We can let __printf_fp do all the printing and just add our
231 unit character afterwards. */
232 fp_info
.width
= info
->width
- 1;
234 done
= __printf_fp (fp
, &fp_info
, &ptr
);
242 /* This is the function used by `vfprintf' to determine number and
243 type of the arguments. */
245 printf_size_info (const struct printf_info
*info
, size_t n
, int *argtypes
)
247 /* We need only one double or long double argument. */
249 argtypes
[0] = PA_DOUBLE
| (info
->is_long_double
? PA_FLAG_LONG_DOUBLE
: 0);