1ASINH(3P) POSIX Programmer's Manual ASINH(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
13 asinh, asinhf, asinhl — inverse hyperbolic sine functions
14
16 #include <math.h>
17 double asinh(double x);
19 float asinhf(float x);
20 long double asinhl(long double x);
21
23 The functionality described on this reference page is aligned with the
24 ISO C standard. Any conflict between the requirements described here
25 and the ISO C standard is unintentional. This volume of POSIX.1‐2008
26 defers to the ISO C standard.
27 These functions shall compute the inverse hyperbolic sine of their
29 argument x.
30 An application wishing to check for error situations should set errno
32 to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these
33 functions. On return, if errno is non-zero or fetestexcept(FE_INVALID |
34 FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an error has
35 occurred.
36
38 Upon successful completion, these functions shall return the inverse
39 hyperbolic sine of their argument.
40 If x is NaN, a NaN shall be returned.
42 If x is ±0, or ±Inf, x shall be returned.
44 If x is subnormal, a range error may occur
46 and x should be returned.
47 If x is not returned, asinh(), asinhf(), and asinhl() shall return an
49 implementation-defined value no greater in magnitude than DBL_MIN,
50 FLT_MIN, and LDBL_MIN, respectively.
51
53 These functions may fail if:
54 Range Error The value of x is subnormal.
56 If the integer expression (math_errhandling & MATH_ERRNO)
58 is non-zero, then errno shall be set to [ERANGE]. If the
59 integer expression (math_errhandling & MATH_ERREXCEPT) is
60 non-zero, then the underflow floating-point exception shall
61 be raised.
62 The following sections are informative.
64
66 None.
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69 On error, the expressions (math_errhandling & MATH_ERRNO) and
70 (math_errhandling & MATH_ERREXCEPT) are independent of each other, but
71 at least one of them must be non-zero.
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74 None.
75
77 None.
78
80 feclearexcept(), fetestexcept(), sinh()
81 The Base Definitions volume of POSIX.1‐2008, Section 4.19, Treatment of
83 Error Conditions for Mathematical Functions, <math.h>
84
86 Portions of this text are reprinted and reproduced in electronic form
87 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
88 -- Portable Operating System Interface (POSIX), The Open Group Base
89 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
90 cal and Electronics Engineers, Inc and The Open Group. (This is
91 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
92 event of any discrepancy between this version and the original IEEE and
93 The Open Group Standard, the original IEEE and The Open Group Standard
94 is the referee document. The original Standard can be obtained online
95 at http://www.unix.org/online.html .
96 Any typographical or formatting errors that appear in this page are
98 most likely to have been introduced during the conversion of the source
99 files to man page format. To report such errors, see https://www.ker‐
100 nel.org/doc/man-pages/reporting_bugs.html .
101IEEE/The Open Group 2013 ASINH(3P)