1 files changed, 112 insertions, 0 deletions
diff --git a/man-pages-posix-2013/man3p/nan.3p b/man-pages-posix-2013/man3p/nan.3p
new file mode 100644
index 0000000..a287256
--- /dev/null
+++ b/man-pages-posix-2013/man3p/nan.3p
@@ -0,0 +1,112 @@
+'\" et
+.TH NAN "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+
+.SH NAME
+nan,
+nanf,
+nanl
+\(em return quiet NaN
+.SH SYNOPSIS
+.LP
+.nf
+#include <math.h>
+.P
+double nan(const char *\fItagp\fP);
+float nanf(const char *\fItagp\fP);
+long double nanl(const char *\fItagp\fP);
+.fi
+.SH DESCRIPTION
+The functionality described on this reference page is aligned with the
+ISO\ C standard. Any conflict between the requirements described here and the
+ISO\ C standard is unintentional. This volume of POSIX.1\(hy2008 defers to the ISO\ C standard.
+.P
+The function call \fInan\fR("\fIn-char-sequence\fR") shall be
+equivalent to:
+.sp
+.RS 4
+.nf
+\fB
+strtod("NAN(\fIn-char-sequence\fP)", (char **) NULL);
+.fi \fR
+.P
+.RE
+.P
+The function call \fInan\fR("\|") shall be equivalent to:
+.sp
+.RS 4
+.nf
+\fB
+strtod("NAN()", (char **) NULL)
+.fi \fR
+.P
+.RE
+.P
+If
+.IR tagp
+does not point to an
+.IR n -\c
+.BR char
+sequence or an empty string, the function call shall be equivalent to:
+.sp
+.RS 4
+.nf
+\fB
+strtod("NAN", (char **) NULL)
+.fi \fR
+.P
+.RE
+.P
+Function calls to
+\fInanf\fR()
+and
+\fInanl\fR()
+are equivalent to the corresponding function calls to
+\fIstrtof\fR()
+and
+\fIstrtold\fR().
+.SH "RETURN VALUE"
+These functions shall return a quiet NaN, if available, with content
+indicated through
+.IR tagp .
+.P
+If the implementation does not support quiet NaNs, these functions
+shall return zero.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIstrtod\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<math.h>\fP"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, Copyright (C) 2013 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.unix.org/online.html .
+
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .