projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright (c) 2020-2022 by Alejandro Colomar <colomar.6.4.3@gmail.com> |
| 2 | .\" and Copyright (c) 2020 by Michael Kerrisk <mtk.manpages@gmail.com> | |
| 3 | .\" | |
| 5fbde956 | 4 | .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
| b4ba165d AC |
5 | .\" |
| 6 | .\" | |
| 45186a5d | 7 | .TH DOUBLE_T 3type 2021-11-02 "Linux man-pages (unreleased)" |
| 1420ba71 | 8 | .SH NAME |
| 98b06647 | 9 | float_t, double_t \- most efficient floating types |
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10 | .SH LIBRARY |
| 11 | Math library | |
| 12 | .RI ( libm ) | |
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13 | .SH SYNOPSIS |
| 14 | .nf | |
| 15 | .B #include <math.h> | |
| 16 | .PP | |
| 98b06647 | 17 | .BR typedef " /* ... */ " float_t; |
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18 | .BR typedef " /* ... */ " double_t; |
| 19 | .fi | |
| 20 | .SH DESCRIPTION | |
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21 | The implementation's most efficient floating types at least as wide as |
| 22 | .I float | |
| 23 | and | |
| 24 | .I double | |
| 25 | respectively. | |
| 26 | Their type depends on the value of the macro | |
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27 | .B FLT_EVAL_METHOD |
| 28 | (defined in | |
| 29 | .IR <float.h> ): | |
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30 | .PP |
| 31 | .TS | |
| 32 | lB rI rI. | |
| 33 | FLT_EVAL_METHOD float_t double_t | |
| 34 | .T& | |
| 35 | n rI rI. | |
| 36 | _ | |
| 37 | 0 float double | |
| 38 | 1 double double | |
| 39 | 2 long double long double | |
| 40 | .TE | |
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41 | .PP |
| 42 | For other values of | |
| 43 | .BR FLT_EVAL_METHOD , | |
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44 | the types of |
| 45 | .I float_t | |
| 46 | and | |
| 1420ba71 | 47 | .I double_t |
| 98b06647 | 48 | are implementation-defined. |
| 3113c7f3 | 49 | .SH STANDARDS |
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50 | C99 and later; POSIX.1-2001 and later. |
| 51 | .SH SEE ALSO | |
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52 | .BR float.h (0p), |
| 53 | .BR math.h (0p) |