/usr/include/rheolef/fnroot.h is in librheolef-dev 5.93-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | #ifndef _FNROOT_H
#define _FNROOT_H
///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef is free software; you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation; either version 2 of the License, or
/// (at your option) any later version.
///
/// Rheolef is distributed in the hope that it will be useful,
/// but WITHOUT ANY WARRANTY; without even the implied warranty of
/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/// GNU General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
/* fnroot.f -- translated by f2c (version 19931217).*/
/*****************************************************************/
/******** FNROOT ..... FIND PSEUDO-PERIPHERAL NODE ********/
/*****************************************************************/
/* PURPOSE - FNROOT IMPLEMENTS A MODIFIED VERSION OF THE */
/* SCHEME BY GIBBS, POOLE, AND STOCKMEYER TO FIND PSEUDO- */
/* PERIPHERAL NODES. IT DETERMINES SUCH A NODE FOR THE */
/* SECTION SUBGRAPH SPECIFIED BY MASK AND ROOT. */
/* INPUT PARAMETERS - */
/* (XADJ, ADJNCY) - ADJACENCY STRUCTURE PAIR FOR THE GRAPH. */
/* MASK - SPECIFIES A SECTION SUBGRAPH. NODES FOR WHICH */
/* MASK IS ZERO ARE IGNORED BY FNROOT. */
/* UPDATED PARAMETER - */
/* ROOT - ON INPUT, IT (ALONG WITH MASK) DEFINES THE */
/* COMPONENT FOR WHICH A PSEUDO-PERIPHERAL NODE IS */
/* TO BE FOUND. ON OUTPUT, IT IS THE NODE OBTAINED. */
/* */
/* OUTPUT PARAMETERS - */
/* NLVL - IS THE NUMBER OF LEVELS IN THE LEVEL STRUCTURE */
/* ROOTED AT THE NODE ROOT. */
/* (XLS,LS) - THE LEVEL STRUCTURE ARRAY PAIR CONTAINING */
/* THE LEVEL STRUCTURE FOUND. */
/* */
/* PROGRAM SUBROUTINES - */
/* ROOTLS. */
/* */
/****************************************************************/
#include "rheolef/rootls.h"
namespace rheolef {
template <class Iterator>
void
fnroot(
Iterator root,
Iterator xadj,
Iterator adjncy,
Iterator mask,
Iterator nlvl,
Iterator xls,
Iterator ls)
{
typedef typename std::iterator_traits<Iterator>::value_type Integer;
/* System generated locals */
Integer i__1, i__2;
/* Local variables */
static Integer ndeg, node, j, k, nabor, kstop, jstrt, kstrt, mindeg,
ccsize, nunlvl;
/* DETERMINE THE LEVEL STRUCTURE ROOTED AT ROOT. */
/* Parameter adjustments */
--ls;
--xls;
--mask;
--adjncy;
--xadj;
rootls(root, &xadj[1], &adjncy[1], &mask[1], nlvl, &xls[1], &ls[1]);
ccsize = xls[*nlvl + 1] - 1;
if (*nlvl == 1 || *nlvl == ccsize) {
return;
}
/* PICK A NODE WITH MINIMUM DEGREE FROM THE LAST LEVEL.*/
L100:
jstrt = xls[*nlvl];
mindeg = ccsize;
*root = ls[jstrt];
if (ccsize == jstrt) {
goto L400;
}
i__1 = ccsize;
for (j = jstrt; j <= i__1; ++j) {
node = ls[j];
ndeg = 0;
kstrt = xadj[node];
kstop = xadj[node + 1] - 1;
i__2 = kstop;
for (k = kstrt; k <= i__2; ++k) {
nabor = adjncy[k];
if (mask[nabor] > 0) {
++ndeg;
}
}
if (ndeg >= mindeg) {
goto L300;
}
*root = node;
mindeg = ndeg;
L300:
;
}
/* AND GENERATE ITS ROOTED LEVEL STRUCTURE.*/
L400:
rootls(root, &xadj[1], &adjncy[1], &mask[1], &nunlvl, &xls[1], &ls[1]);
if (nunlvl <= *nlvl) {
return;
}
*nlvl = nunlvl;
if (*nlvl < ccsize) {
goto L100;
}
}
}// namespace rheolef
#endif // _FNROOT_H
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