projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) |
| 2 | .\" Distributed under GPL | |
| 3 | .\" based on glibc infopages | |
| cc4615cc | 4 | .TH SIGNIFICAND 3 2007-07-26 "GNU" "Linux Programmer's Manual" |
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5 | .SH NAME |
| 6 | significand, significandf, significandl \- | |
| 7 | get mantissa of floating point number | |
| 8 | .SH SYNOPSIS | |
| 9 | .B #include <math.h> | |
| c13182ef | 10 | .sp |
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11 | .BI "double significand(double " x ); |
| 12 | .br | |
| 13 | .BI "float significandf(float " x ); | |
| 14 | .br | |
| 15 | .BI "long double significandl(long double " x ); | |
| 16 | .sp | |
| e9329f6d | 17 | Link with \fI-lm\fP. |
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18 | .sp |
| 19 | .in -4n | |
| 20 | Feature Test Macro Requirements for glibc (see | |
| 21 | .BR feature_test_macros (7)): | |
| 22 | .in | |
| 23 | .sp | |
| 24 | .ad l | |
| 25 | .BR significand (), | |
| 26 | .BR significandf (), | |
| 27 | .BR significandl (): | |
| 28 | _SVID_SOURCE || _BSD_SOURCE | |
| 29 | .ad b | |
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30 | .SH DESCRIPTION |
| 31 | The | |
| 63aa9df0 | 32 | .BR significand () |
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33 | function returns the mantissa of |
| 34 | .I x | |
| 35 | scaled to the range [1,2). | |
| 36 | It is equivalent to | |
| 37 | .sp | |
| 38 | .in +8 | |
| c65433e6 | 39 | scalb(x, (double) \-ilogb(x)) |
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40 | .in -8 |
| 41 | .PP | |
| 42 | This function exists mainly for use in certain standardized tests | |
| 43 | for IEEE 754 conformance. | |
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44 | .\" .SH HISTORY |
| 45 | .\" This function came from BSD. | |
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46 | .SH "SEE ALSO" |
| 47 | .BR ilogb (3), | |
| 48 | .BR scalb (3) |