mirror of https://github.com/mkerrisk/man-pages
78 lines
2.9 KiB
Plaintext
78 lines
2.9 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "ISGREATEREQUAL" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" isgreaterequal
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.SH PROLOG
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This manual page is part of the POSIX Programmer's Manual.
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The Linux implementation of this interface may differ (consult
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the corresponding Linux manual page for details of Linux behavior),
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or the interface may not be implemented on Linux.
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.SH NAME
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isgreaterequal \- test if x is greater than or equal to y
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.SH SYNOPSIS
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.LP
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\fB#include <math.h>
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.br
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.sp
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int isgreaterequal(real-floating\fP \fIx\fP\fB, real-floating\fP \fIy\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIisgreaterequal\fP() macro shall determine whether its first
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argument is greater than or equal to its second argument.
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The value of \fIisgreaterequal\fP( \fIx\fP, \fIy\fP) shall be equal
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to (\fIx\fP)\ >=\ (\fIy\fP); however, unlike
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(\fIx\fP)\ >=\ (\fIy\fP), \fIisgreaterequal\fP( \fIx\fP, \fIy\fP)
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shall not raise the invalid floating-point
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exception when \fIx\fP and \fIy\fP are unordered.
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.SH RETURN VALUE
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.LP
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Upon successful completion, the \fIisgreaterequal\fP() macro shall
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return the value of
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(\fIx\fP)\ >=\ (\fIy\fP).
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.LP
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If \fIx\fP or \fIy\fP is NaN, 0 shall be returned.
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.SH ERRORS
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.LP
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No errors are defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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The relational and equality operators support the usual mathematical
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relationships between numeric values. For any ordered pair
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of numeric values, exactly one of the relationships (less, greater,
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and equal) is true. Relational operators may raise the invalid
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floating-point exception when argument values are NaNs. For a NaN
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and a numeric value, or for two NaNs, just the unordered
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relationship is true. This macro is a quiet (non-floating-point exception
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raising) version of a relational operator. It facilitates
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writing efficient code that accounts for NaNs without suffering the
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invalid floating-point exception. In the SYNOPSIS section,
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\fBreal-floating\fP indicates that the argument shall be an expression
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of \fBreal-floating\fP type.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIisgreater\fP(), \fIisless\fP(), \fIislessequal\fP(), \fIislessgreater\fP(),
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\fIisunordered\fP(), the Base Definitions volume of IEEE\ Std\ 1003.1-2001
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\fI<math.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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