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by Francesco Paolo Lovergine
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved |
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by Francesco Paolo Lovergine
* Alligned to linux main manpages edition. |
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.TH "ISLESSGREATER" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" |
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by Francesco Paolo Lovergine
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.\" islessgreater |
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.SH NAME |
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islessgreater \- test if x is less than or greater than 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 islessgreater(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 \fIislessgreater\fP() macro shall determine whether its first |
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argument is less than or greater than its second argument. |
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The \fIislessgreater\fP( \fIx\fP, \fIy\fP) macro is similar to |
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(\fIx\fP)\ <\ (\fIy\fP)\ ||\ (\fIx\fP)\ >\ (\fIy\fP); however, \fIislessgreater\fP( |
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\fIx\fP, |
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\fIy\fP) shall not raise the invalid floating-point exception when |
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\fIx\fP and \fIy\fP are unordered (nor shall it evaluate |
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\fIx\fP and \fIy\fP twice). |
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.SH RETURN VALUE |
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.LP
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Upon successful completion, the \fIislessgreater\fP() macro shall |
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return the value of |
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(\fIx\fP)\ <\ (\fIy\fP)\ ||\ (\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() , \fIisgreaterequal\fP() , \fIisless\fP() , \fIislessequal\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 . |