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3e5f5557 | 1 | /* Print size value using units for orders of magnitude. |
568035b7 | 2 | Copyright (C) 1997-2013 Free Software Foundation, Inc. |
3e5f5557 UD |
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>. | |
6 | ||
7 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
8 | modify it under the terms of the GNU Lesser General Public |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
3e5f5557 UD |
11 | |
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 | |
41bdb6e2 | 15 | Lesser General Public License for more details. |
3e5f5557 | 16 | |
41bdb6e2 | 17 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
19 | <http://www.gnu.org/licenses/>. */ | |
3e5f5557 UD |
20 | |
21 | #include <ctype.h> | |
22 | #include <ieee754.h> | |
23 | #include <math.h> | |
24 | #include <printf.h> | |
14c35863 | 25 | #include <libioP.h> |
3e5f5557 UD |
26 | |
27 | ||
28 | /* This defines make it possible to use the same code for GNU C library and | |
29 | the GNU I/O library. */ | |
14c35863 | 30 | #define PUT(f, s, n) _IO_sputn (f, s, n) |
d18ea0c5 | 31 | #define PAD(f, c, n) (wide ? _IO_wpadn (f, c, n) : _IO_padn (f, c, n)) |
3e5f5557 UD |
32 | /* We use this file GNU C library and GNU I/O library. So make |
33 | names equal. */ | |
14c35863 UD |
34 | #undef putc |
35 | #define putc(c, f) (wide \ | |
36 | ? (int)_IO_putwc_unlocked (c, f) : _IO_putc_unlocked (c, f)) | |
37 | #define size_t _IO_size_t | |
38 | #define FILE _IO_FILE | |
3e5f5557 UD |
39 | \f |
40 | /* Macros for doing the actual output. */ | |
41 | ||
42 | #define outchar(ch) \ | |
43 | do \ | |
44 | { \ | |
2e09a79a | 45 | const int outc = (ch); \ |
3e5f5557 UD |
46 | if (putc (outc, fp) == EOF) \ |
47 | return -1; \ | |
48 | ++done; \ | |
49 | } while (0) | |
50 | ||
a1d84548 | 51 | #define PRINT(ptr, wptr, len) \ |
3e5f5557 UD |
52 | do \ |
53 | { \ | |
2e09a79a | 54 | size_t outlen = (len); \ |
3e5f5557 UD |
55 | if (len > 20) \ |
56 | { \ | |
a1d84548 | 57 | if (PUT (fp, wide ? (const char *) wptr : ptr, outlen) != outlen) \ |
3e5f5557 UD |
58 | return -1; \ |
59 | ptr += outlen; \ | |
60 | done += outlen; \ | |
61 | } \ | |
62 | else \ | |
63 | { \ | |
a1d84548 UD |
64 | if (wide) \ |
65 | while (outlen-- > 0) \ | |
66 | outchar (*wptr++); \ | |
67 | else \ | |
68 | while (outlen-- > 0) \ | |
69 | outchar (*ptr++); \ | |
3e5f5557 UD |
70 | } \ |
71 | } while (0) | |
72 | ||
73 | #define PADN(ch, len) \ | |
74 | do \ | |
75 | { \ | |
76 | if (PAD (fp, ch, len) != len) \ | |
77 | return -1; \ | |
78 | done += len; \ | |
79 | } \ | |
80 | while (0) | |
81 | \f | |
82 | /* Prototype for helper functions. */ | |
83 | extern int __printf_fp (FILE *fp, const struct printf_info *info, | |
84 | const void *const *args); | |
85 | ||
86 | \f | |
87 | int | |
c6251f03 RM |
88 | __printf_size (FILE *fp, const struct printf_info *info, |
89 | const void *const *args) | |
3e5f5557 UD |
90 | { |
91 | /* Units for the both formats. */ | |
779ae82e UD |
92 | #define BINARY_UNITS " kmgtpezy" |
93 | #define DECIMAL_UNITS " KMGTPEZY" | |
94 | static const char units[2][sizeof (BINARY_UNITS)] = | |
3e5f5557 | 95 | { |
779ae82e UD |
96 | BINARY_UNITS, /* For binary format. */ |
97 | DECIMAL_UNITS /* For decimal format. */ | |
3e5f5557 UD |
98 | }; |
99 | const char *tag = units[isupper (info->spec) != 0]; | |
100 | int divisor = isupper (info->spec) ? 1000 : 1024; | |
101 | ||
102 | /* The floating-point value to output. */ | |
103 | union | |
104 | { | |
105 | union ieee754_double dbl; | |
1b6adf88 | 106 | long double ldbl; |
3e5f5557 UD |
107 | } |
108 | fpnum; | |
109 | const void *ptr = &fpnum; | |
110 | ||
187da0ae | 111 | int fpnum_sign = 0; |
3e5f5557 UD |
112 | |
113 | /* "NaN" or "Inf" for the special cases. */ | |
114 | const char *special = NULL; | |
a1d84548 | 115 | const wchar_t *wspecial = NULL; |
3e5f5557 UD |
116 | |
117 | struct printf_info fp_info; | |
118 | int done = 0; | |
a1d84548 | 119 | int wide = info->wide; |
187da0ae | 120 | int res; |
3e5f5557 UD |
121 | |
122 | /* Fetch the argument value. */ | |
f98b4bbd | 123 | #ifndef __NO_LONG_DOUBLE_MATH |
3e5f5557 UD |
124 | if (info->is_long_double && sizeof (long double) > sizeof (double)) |
125 | { | |
1b6adf88 | 126 | fpnum.ldbl = *(const long double *) args[0]; |
3e5f5557 UD |
127 | |
128 | /* Check for special values: not a number or infinity. */ | |
1b6adf88 | 129 | if (__isnanl (fpnum.ldbl)) |
3e5f5557 UD |
130 | { |
131 | special = "nan"; | |
a1d84548 | 132 | wspecial = L"nan"; |
187da0ae | 133 | // fpnum_sign = 0; Already zero |
3e5f5557 | 134 | } |
1b6adf88 | 135 | else if ((res = __isinfl (fpnum.ldbl))) |
3e5f5557 | 136 | { |
187da0ae | 137 | fpnum_sign = res; |
3e5f5557 | 138 | special = "inf"; |
a1d84548 | 139 | wspecial = L"inf"; |
3e5f5557 UD |
140 | } |
141 | else | |
1b6adf88 | 142 | while (fpnum.ldbl >= divisor && tag[1] != '\0') |
3e5f5557 | 143 | { |
1b6adf88 | 144 | fpnum.ldbl /= divisor; |
3e5f5557 UD |
145 | ++tag; |
146 | } | |
147 | } | |
148 | else | |
f98b4bbd | 149 | #endif /* no long double */ |
3e5f5557 UD |
150 | { |
151 | fpnum.dbl.d = *(const double *) args[0]; | |
152 | ||
153 | /* Check for special values: not a number or infinity. */ | |
76f2646f | 154 | if (__isnan (fpnum.dbl.d)) |
3e5f5557 UD |
155 | { |
156 | special = "nan"; | |
a1d84548 | 157 | wspecial = L"nan"; |
187da0ae | 158 | // fpnum_sign = 0; Already zero |
3e5f5557 | 159 | } |
187da0ae | 160 | else if ((res = __isinf (fpnum.dbl.d))) |
3e5f5557 | 161 | { |
187da0ae | 162 | fpnum_sign = res; |
3e5f5557 | 163 | special = "inf"; |
a1d84548 | 164 | wspecial = L"inf"; |
3e5f5557 UD |
165 | } |
166 | else | |
167 | while (fpnum.dbl.d >= divisor && tag[1] != '\0') | |
168 | { | |
169 | fpnum.dbl.d /= divisor; | |
170 | ++tag; | |
171 | } | |
172 | } | |
173 | ||
174 | if (special) | |
175 | { | |
fa5753ee | 176 | int width = info->prec > info->width ? info->prec : info->width; |
3e5f5557 | 177 | |
187da0ae | 178 | if (fpnum_sign < 0 || info->showsign || info->space) |
3e5f5557 UD |
179 | --width; |
180 | width -= 3; | |
181 | ||
182 | if (!info->left && width > 0) | |
183 | PADN (' ', width); | |
184 | ||
187da0ae | 185 | if (fpnum_sign < 0) |
3e5f5557 UD |
186 | outchar ('-'); |
187 | else if (info->showsign) | |
188 | outchar ('+'); | |
189 | else if (info->space) | |
190 | outchar (' '); | |
191 | ||
a1d84548 | 192 | PRINT (special, wspecial, 3); |
3e5f5557 UD |
193 | |
194 | if (info->left && width > 0) | |
195 | PADN (' ', width); | |
196 | ||
197 | return done; | |
198 | } | |
199 | ||
200 | /* Prepare to print the number. We want to use `__printf_fp' so we | |
201 | have to prepare a `printf_info' structure. */ | |
7c11c4a1 | 202 | fp_info = *info; |
3e5f5557 UD |
203 | fp_info.spec = 'f'; |
204 | fp_info.prec = info->prec < 0 ? 3 : info->prec; | |
a1d84548 | 205 | fp_info.wide = wide; |
3e5f5557 UD |
206 | |
207 | if (fp_info.left && fp_info.pad == L' ') | |
208 | { | |
209 | /* We must do the padding ourself since the unit character must | |
210 | be placed before the padding spaces. */ | |
211 | fp_info.width = 0; | |
212 | ||
213 | done = __printf_fp (fp, &fp_info, &ptr); | |
214 | if (done > 0) | |
215 | { | |
216 | outchar (*tag); | |
217 | if (info->width > done) | |
218 | PADN (' ', info->width - done); | |
219 | } | |
220 | } | |
221 | else | |
222 | { | |
223 | /* We can let __printf_fp do all the printing and just add our | |
224 | unit character afterwards. */ | |
225 | fp_info.width = info->width - 1; | |
226 | ||
227 | done = __printf_fp (fp, &fp_info, &ptr); | |
228 | if (done > 0) | |
229 | outchar (*tag); | |
230 | } | |
231 | ||
232 | return done; | |
233 | } | |
c6251f03 | 234 | ldbl_strong_alias (__printf_size, printf_size); |
3e5f5557 UD |
235 | \f |
236 | /* This is the function used by `vfprintf' to determine number and | |
237 | type of the arguments. */ | |
238 | int | |
239 | printf_size_info (const struct printf_info *info, size_t n, int *argtypes) | |
240 | { | |
241 | /* We need only one double or long double argument. */ | |
242 | if (n >= 1) | |
243 | argtypes[0] = PA_DOUBLE | (info->is_long_double ? PA_FLAG_LONG_DOUBLE : 0); | |
244 | ||
245 | return 1; | |
246 | } |