Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,149 @@
+/*  -- translated by f2c (version 20191129).
+   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 DNRM2   
+
+    =========== DOCUMENTATION ===========   
+
+   Online html documentation available at   
+              http://www.netlib.org/lapack/explore-html/   
+
+    Definition:   
+    ===========   
+
+         DOUBLE PRECISION FUNCTION DNRM2(N,X,INCX)   
+
+         INTEGER INCX,N   
+         DOUBLE PRECISION X(*)   
+
+
+   > \par Purpose:   
+    =============   
+   >   
+   > \verbatim   
+   >   
+   > DNRM2 returns the euclidean norm of a vector via the function   
+   > name, so that   
+   >   
+   >    DNRM2 := sqrt( x'*x )   
+   > \endverbatim   
+
+    Arguments:   
+    ==========   
+
+   > \param[in] N   
+   > \verbatim   
+   >          N is INTEGER   
+   >         number of elements in input vector(s)   
+   > \endverbatim   
+   >   
+   > \param[in] X   
+   > \verbatim   
+   >          X is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )   
+   > \endverbatim   
+   >   
+   > \param[in] INCX   
+   > \verbatim   
+   >          INCX is INTEGER   
+   >         storage spacing between elements of DX   
+   > \endverbatim   
+
+    Authors:   
+    ========   
+
+   > \author Univ. of Tennessee   
+   > \author Univ. of California Berkeley   
+   > \author Univ. of Colorado Denver   
+   > \author NAG Ltd.   
+
+   > \date November 2017   
+
+   > \ingroup double_blas_level1   
+
+   > \par Further Details:   
+    =====================   
+   >   
+   > \verbatim   
+   >   
+   >  -- This version written on 25-October-1982.   
+   >     Modified on 14-October-1993 to inline the call to DLASSQ.   
+   >     Sven Hammarling, Nag Ltd.   
+   > \endverbatim   
+   >   
+    ===================================================================== */
+doublereal igraphdnrm2_(integer *n, doublereal *x, integer *incx)
+{
+    /* System generated locals */
+    integer i__1, i__2;
+    doublereal ret_val, d__1;
+
+    /* Builtin functions */
+    double sqrt(doublereal);
+
+    /* Local variables */
+    integer ix;
+    doublereal ssq, norm, scale, absxi;
+
+
+/*  -- Reference BLAS level1 routine (version 3.8.0) --   
+    -- Reference BLAS is a software package provided by Univ. of Tennessee,    --   
+    -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--   
+       November 2017   
+
+
+    =====================================================================   
+
+       Parameter adjustments */
+    --x;
+
+    /* Function Body */
+    if (*n < 1 || *incx < 1) {
+	norm = 0.;
+    } else if (*n == 1) {
+	norm = abs(x[1]);
+    } else {
+	scale = 0.;
+	ssq = 1.;
+/*        The following loop is equivalent to this call to the LAPACK   
+          auxiliary routine:   
+          CALL DLASSQ( N, X, INCX, SCALE, SSQ ) */
+
+	i__1 = (*n - 1) * *incx + 1;
+	i__2 = *incx;
+	for (ix = 1; i__2 < 0 ? ix >= i__1 : ix <= i__1; ix += i__2) {
+	    if (x[ix] != 0.) {
+		absxi = (d__1 = x[ix], abs(d__1));
+		if (scale < absxi) {
+/* Computing 2nd power */
+		    d__1 = scale / absxi;
+		    ssq = ssq * (d__1 * d__1) + 1.;
+		    scale = absxi;
+		} else {
+/* Computing 2nd power */
+		    d__1 = absxi / scale;
+		    ssq += d__1 * d__1;
+		}
+	    }
+/* L10: */
+	}
+	norm = scale * sqrt(ssq);
+    }
+
+    ret_val = norm;
+    return ret_val;
+
+/*     End of DNRM2. */
+
+} /* igraphdnrm2_ */
+