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annotate liboctave/lgamma.c @ 1919:b582f7f765e0

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[project @ 1996-02-11 01:58:47 by jwe]
author jwe
date Sun, 11 Feb 1996 02:02:55 +0000
parents 1281a23a34dd
children 1b57120c997b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, write to the Free
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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20
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21 */
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #ifndef HAVE_LGAMMA
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28
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29 #include "f77-fcn.h"
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31 /* If the system doesn't have lgamma, assume that it doesn't have
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32 signgam either */
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33
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34 int signgam;
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36 extern int F77_FCN (dlgams, DLGAMS) (const double*, double*, double*);
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37
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38 double
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39 lgamma (double x)
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40 {
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41 double result;
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42 double sgngam;
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43
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44 F77_FCN (dlgams, DLGAMS) (&x, &result, &sgngam);
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46 signgam = (int) sgngam;
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47
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48 return result;
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49 }
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50
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51 #endif
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52
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53 /*
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54 ;;; Local Variables: ***
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55 ;;; mode: C ***
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56 ;;; page-delimiter: "^/\\*" ***
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57 ;;; End: ***
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58 */