Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
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+/*  -- translated by f2c (version 20240504).
+   You must link the resulting object file with libf2c:
+	on Microsoft Windows system, link with libf2c.lib;
+	on Linux or Unix systems, link with .../path/to/libf2c.a -lm
+	or, if you install libf2c.a in a standard place, with -lf2c -lm
+	-- in that order, at the end of the command line, as in
+		cc *.o -lf2c -lm
+	Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
+
+		http://www.netlib.org/f2c/libf2c.zip
+*/
+
+#include "f2c.h"
+
+/* > \brief \b DLABAD   
+
+    =========== DOCUMENTATION ===========   
+
+   Online html documentation available at   
+              http://www.netlib.org/lapack/explore-html/   
+
+   > \htmlonly   
+   > Download DLABAD + dependencies   
+   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlabad.
+f">   
+   > [TGZ]</a>   
+   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlabad.
+f">   
+   > [ZIP]</a>   
+   > <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlabad.
+f">   
+   > [TXT]</a>   
+   > \endhtmlonly   
+
+    Definition:   
+    ===========   
+
+         SUBROUTINE DLABAD( SMALL, LARGE )   
+
+         DOUBLE PRECISION   LARGE, SMALL   
+
+
+   > \par Purpose:   
+    =============   
+   >   
+   > \verbatim   
+   >   
+   > DLABAD takes as input the values computed by DLAMCH for underflow and   
+   > overflow, and returns the square root of each of these values if the   
+   > log of LARGE is sufficiently large.  This subroutine is intended to   
+   > identify machines with a large exponent range, such as the Crays, and   
+   > redefine the underflow and overflow limits to be the square roots of   
+   > the values computed by DLAMCH.  This subroutine is needed because   
+   > DLAMCH does not compensate for poor arithmetic in the upper half of   
+   > the exponent range, as is found on a Cray.   
+   > \endverbatim   
+
+    Arguments:   
+    ==========   
+
+   > \param[in,out] SMALL   
+   > \verbatim   
+   >          SMALL is DOUBLE PRECISION   
+   >          On entry, the underflow threshold as computed by DLAMCH.   
+   >          On exit, if LOG10(LARGE) is sufficiently large, the square   
+   >          root of SMALL, otherwise unchanged.   
+   > \endverbatim   
+   >   
+   > \param[in,out] LARGE   
+   > \verbatim   
+   >          LARGE is DOUBLE PRECISION   
+   >          On entry, the overflow threshold as computed by DLAMCH.   
+   >          On exit, if LOG10(LARGE) is sufficiently large, the square   
+   >          root of LARGE, otherwise unchanged.   
+   > \endverbatim   
+
+    Authors:   
+    ========   
+
+   > \author Univ. of Tennessee   
+   > \author Univ. of California Berkeley   
+   > \author Univ. of Colorado Denver   
+   > \author NAG Ltd.   
+
+   > \date November 2011   
+
+   > \ingroup auxOTHERauxiliary   
+
+    =====================================================================   
+   Subroutine */ int igraphdlabad_(doublereal *small, doublereal *large)
+{
+    /* Builtin functions */
+    double d_lg10(doublereal *), sqrt(doublereal);
+
+
+/*  -- LAPACK auxiliary routine (version 3.4.0) --   
+    -- LAPACK is a software package provided by Univ. of Tennessee,    --   
+    -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--   
+       November 2011   
+
+
+    =====================================================================   
+
+
+       If it looks like we're on a Cray, take the square root of   
+       SMALL and LARGE to avoid overflow and underflow problems. */
+
+    if (d_lg10(large) > 2e3) {
+	*small = sqrt(*small);
+	*large = sqrt(*large);
+    }
+
+    return 0;
+
+/*     End of DLABAD */
+
+} /* igraphdlabad_ */
+