source: branches/2520_PersistenceReintegration/HeuristicLab.ExtLibs/HeuristicLab.Igraph/0.8.0-pre/HeuristicLab.Igraph-0.8.0-pre/DllImporter.cs @ 16453

Last change on this file since 16453 was 16453, checked in by jkarder, 2 years ago

#2520: updated year of copyrights

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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Runtime.InteropServices;
24
25namespace HeuristicLab.IGraph {
26  internal static class DllImporter {
27    private const string X86Dll = "igraph-0.8.0-pre-x86.dll";
28    private const string X64Dll = "igraph-0.8.0-pre-x64.dll";
29    private readonly static bool X86 = false;
30
31    static DllImporter() {
32      X86 = !Environment.Is64BitProcess;
33    }
34
35    #region igraph
36    #region igraph init/finalize
37    internal static void igraph_empty(igraph_t graph, int n, bool directed) {
38      if (X86) igraph_empty_x86(graph, n, directed);
39      else igraph_empty_x64(graph, n, directed);
40    }
41    internal static int igraph_destroy(igraph_t graph) {
42      return X86 ? igraph_destroy_x86(graph) : igraph_destroy_x64(graph);
43    }
44    #endregion
45
46    #region igraph query
47    internal static int igraph_vcount(igraph_t graph) {
48      return X86 ? igraph_vcount_x86(graph) : igraph_vcount_x64(graph);
49    }
50    #endregion
51
52    #region igraph characteristics
53    internal static int igraph_density(igraph_t graph, out double density, bool loops) {
54      density = double.NaN;
55      return X86 ? igraph_density_x86(graph, ref density, loops) : igraph_density_x64(graph, ref density, loops);
56    }
57
58    internal static int igraph_pagerank(igraph_t graph, igraph_pagerank_algo_t algo, igraph_vector_t vector, out double value, igraph_vs_t vids, bool directed, double damping, igraph_vector_t weights) {
59      value = 1;
60      var options = IntPtr.Zero;
61      if (algo == igraph_pagerank_algo_t.IGRAPH_PAGERANK_ALGO_ARPACK) {
62        var arpackoptions = GetDefaultArpackOptions();
63        options = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(igraph_arpack_options_t)));
64        Marshal.StructureToPtr(arpackoptions, options, false);
65      } else if (algo == igraph_pagerank_algo_t.IGRAPH_PAGERANK_ALGO_POWER) {
66        var poweroptions = GetDefaultPowerOptions();
67        options = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(igraph_pagerank_power_options_t)));
68        Marshal.StructureToPtr(poweroptions, options, false);
69      }
70      try {
71        return X86 ? igraph_pagerank_x86(graph, algo, vector, ref value, vids, directed, damping, weights, options) : igraph_pagerank_x64(graph, algo, vector, ref value, vids, directed, damping, weights, options);
72      } finally {
73        if (algo == igraph_pagerank_algo_t.IGRAPH_PAGERANK_ALGO_ARPACK) {
74          Marshal.DestroyStructure(options, typeof(igraph_arpack_options_t));
75          Marshal.FreeHGlobal(options);
76        } else if (algo == igraph_pagerank_algo_t.IGRAPH_PAGERANK_ALGO_POWER) {
77          Marshal.DestroyStructure(options, typeof(igraph_pagerank_power_options_t));
78          Marshal.FreeHGlobal(options);
79        }
80      }
81    }
82
83    unsafe private static igraph_arpack_options_t GetDefaultArpackOptions() {
84      var arpackoptions = new igraph_arpack_options_t();
85      arpackoptions.bmat[0] = 'I';
86      arpackoptions.which[0] = arpackoptions.which[1] = 'X';
87      arpackoptions.nev = 1;
88      arpackoptions.ishift = 1;
89      arpackoptions.mxiter = 1000;
90      arpackoptions.nb = 1;
91      arpackoptions.mode = 1;
92      arpackoptions.iparam[0] = arpackoptions.ishift;
93      arpackoptions.iparam[1] = arpackoptions.iparam[4] = arpackoptions.iparam[5] = arpackoptions.iparam[7] = arpackoptions.iparam[8] = arpackoptions.iparam[9] = arpackoptions.iparam[10] = 0;
94      arpackoptions.iparam[2] = arpackoptions.mxiter;
95      arpackoptions.iparam[3] = arpackoptions.nb;
96      arpackoptions.iparam[6] = arpackoptions.mode;
97      return arpackoptions;
98    }
99
100    private static igraph_pagerank_power_options_t GetDefaultPowerOptions() {
101      var poweroptions = new igraph_pagerank_power_options_t();
102      poweroptions.niter = 50;
103      poweroptions.eps = 1e-5;
104      return poweroptions;
105    }
106    #endregion
107
108    #region igraph manipulation
109    internal static int igraph_add_edge(igraph_t graph, int from, int to) {
110      return X86 ? igraph_add_edge_x86(graph, from, to) : igraph_add_edge_x64(graph, from, to);
111    }
112    #endregion
113
114    #region igraph visits
115    internal static int igraph_bfs(igraph_t graph, int root, igraph_vector_t roots, igraph_neimode_t mode, bool unreachable, igraph_vector_t restricted, igraph_vector_t order, igraph_vector_t rank, igraph_vector_t father, igraph_vector_t pred, igraph_vector_t succ, igraph_vector_t dist, igraph_bfshandler_t callback, object tag) {
116      return MarshalIfExistsAndCall(tag, ptr => X86 ? igraph_bfs_x86(graph, root, roots, mode, unreachable, restricted, order, rank, father, pred, succ, dist, callback, ptr) : igraph_bfs_x64(graph, root, roots, mode, unreachable, restricted, order, rank, father, pred, succ, dist, callback, ptr));
117    }
118    internal static int igraph_dfs(igraph_t graph, int root, igraph_neimode_t mode, bool unreachable, igraph_vector_t order, igraph_vector_t order_out, igraph_vector_t father, igraph_vector_t dist, igraph_dfshandler_t inWrapper, igraph_dfshandler_t outWrapper, object tag) {
119      return MarshalIfExistsAndCall(tag, ptr => X86 ? igraph_dfs_x86(graph, root, mode, unreachable, order, order_out, father, dist, inWrapper, outWrapper, ptr) : igraph_dfs_x64(graph, root, mode, unreachable, order, order_out, father, dist, inWrapper, outWrapper, ptr));
120    }
121    #endregion
122
123    #region Platform specific DLL imports
124    [DllImport(X86Dll, EntryPoint = "igraph_empty", CallingConvention = CallingConvention.Cdecl)]
125    private static extern void igraph_empty_x86([In, Out]igraph_t graph, int n, bool directed);
126    [DllImport(X64Dll, EntryPoint = "igraph_empty", CallingConvention = CallingConvention.Cdecl)]
127    private static extern void igraph_empty_x64([In, Out]igraph_t graph, int n, bool directed);
128    [DllImport(X86Dll, EntryPoint = "igraph_destroy", CallingConvention = CallingConvention.Cdecl)]
129    private static extern int igraph_destroy_x86([In, Out]igraph_t graph);
130    [DllImport(X64Dll, EntryPoint = "igraph_destroy", CallingConvention = CallingConvention.Cdecl)]
131    private static extern int igraph_destroy_x64([In, Out]igraph_t graph);
132    [DllImport(X86Dll, EntryPoint = "igraph_vcount", CallingConvention = CallingConvention.Cdecl)]
133    private static extern int igraph_vcount_x86(igraph_t graph);
134    [DllImport(X64Dll, EntryPoint = "igraph_vcount", CallingConvention = CallingConvention.Cdecl)]
135    private static extern int igraph_vcount_x64(igraph_t graph);
136    [DllImport(X86Dll, EntryPoint = "igraph_add_edge", CallingConvention = CallingConvention.Cdecl)]
137    private static extern int igraph_add_edge_x86([In, Out]igraph_t graph, int from, int to);
138    [DllImport(X64Dll, EntryPoint = "igraph_add_edge", CallingConvention = CallingConvention.Cdecl)]
139    private static extern int igraph_add_edge_x64([In, Out]igraph_t graph, int from, int to);
140    [DllImport(X86Dll, EntryPoint = "igraph_density", CallingConvention = CallingConvention.Cdecl)]
141    private static extern int igraph_density_x86(igraph_t graph, ref double density, bool loops);
142    [DllImport(X64Dll, EntryPoint = "igraph_density", CallingConvention = CallingConvention.Cdecl)]
143    private static extern int igraph_density_x64(igraph_t graph, ref double density, bool loops);
144    [DllImport(X86Dll, EntryPoint = "igraph_pagerank", CallingConvention = CallingConvention.Cdecl)]
145    private static extern int igraph_pagerank_x86(igraph_t graph, igraph_pagerank_algo_t algo, [In, Out]igraph_vector_t vector, ref double value, igraph_vs_t vids, bool directed, double damping, igraph_vector_t weights, IntPtr options);
146    [DllImport(X64Dll, EntryPoint = "igraph_pagerank", CallingConvention = CallingConvention.Cdecl)]
147    private static extern int igraph_pagerank_x64(igraph_t graph, igraph_pagerank_algo_t algo, [In, Out]igraph_vector_t vector, ref double value, igraph_vs_t vids, bool directed, double damping, igraph_vector_t weights, IntPtr options);
148    [DllImport(X86Dll, EntryPoint = "igraph_bfs", CallingConvention = CallingConvention.Cdecl)]
149    private static extern int igraph_bfs_x86(igraph_t graph, int root, igraph_vector_t roots, igraph_neimode_t mode, bool unreachable, igraph_vector_t restricted, [In, Out]igraph_vector_t order, [In, Out]igraph_vector_t rank, [In, Out]igraph_vector_t father, [In, Out]igraph_vector_t pred, [In, Out]igraph_vector_t succ, [In, Out]igraph_vector_t dist, igraph_bfshandler_t callback, IntPtr extra);
150    [DllImport(X64Dll, EntryPoint = "igraph_bfs", CallingConvention = CallingConvention.Cdecl)]
151    private static extern int igraph_bfs_x64(igraph_t graph, int root, igraph_vector_t roots, igraph_neimode_t mode, bool unreachable, igraph_vector_t restricted, [In, Out]igraph_vector_t order, [In, Out]igraph_vector_t rank, [In, Out]igraph_vector_t father, [In, Out]igraph_vector_t pred, [In, Out]igraph_vector_t succ, [In, Out]igraph_vector_t dist, igraph_bfshandler_t callback, IntPtr extra);
152    [DllImport(X86Dll, EntryPoint = "igraph_dfs", CallingConvention = CallingConvention.Cdecl)]
153    private static extern int igraph_dfs_x86(igraph_t graph, int root, igraph_neimode_t mode, bool unreachable, [In, Out]igraph_vector_t order, [In, Out]igraph_vector_t order_out, [In, Out]igraph_vector_t father, [In, Out]igraph_vector_t dist, igraph_dfshandler_t in_callback, igraph_dfshandler_t out_callback, IntPtr extra);
154    [DllImport(X64Dll, EntryPoint = "igraph_dfs", CallingConvention = CallingConvention.Cdecl)]
155    private static extern int igraph_dfs_x64(igraph_t graph, int root, igraph_neimode_t mode, bool unreachable, [In, Out]igraph_vector_t order, [In, Out]igraph_vector_t order_out, [In, Out]igraph_vector_t father, [In, Out]igraph_vector_t dist, igraph_dfshandler_t in_callback, igraph_dfshandler_t out_callback, IntPtr extra);
156    #endregion
157    #endregion
158
159    #region igraph_rng
160    internal static int igraph_rng_get_integer(int l, int h) {
161      return X86 ? igraph_rng_get_integer_x86(igraph_rng_default_x86(), l, h) : igraph_rng_get_integer_x64(igraph_rng_default_x64(), l, h);
162    }
163    internal static int igraph_rng_seed(uint seed) {
164      return X86 ? igraph_rng_seed_x86(igraph_rng_default_x86(), seed) : igraph_rng_seed_x64(igraph_rng_default_x64(), seed);
165    }
166
167    #region Platform specific DLL imports
168    [DllImport(X86Dll, EntryPoint = "igraph_rng_default", CallingConvention = CallingConvention.Cdecl)]
169    private static extern IntPtr igraph_rng_default_x86();
170    [DllImport(X64Dll, EntryPoint = "igraph_rng_default", CallingConvention = CallingConvention.Cdecl)]
171    private static extern IntPtr igraph_rng_default_x64();
172    [DllImport(X86Dll, EntryPoint = "igraph_rng_get_integer", CallingConvention = CallingConvention.Cdecl)]
173    private static extern int igraph_rng_get_integer_x86(IntPtr rng, int l, int h);
174    [DllImport(X64Dll, EntryPoint = "igraph_rng_get_integer", CallingConvention = CallingConvention.Cdecl)]
175    private static extern int igraph_rng_get_integer_x64(IntPtr rng, int l, int h);
176    [DllImport(X86Dll, EntryPoint = "igraph_rng_seed", CallingConvention = CallingConvention.Cdecl)]
177    private static extern int igraph_rng_seed_x86(IntPtr rng, uint seed);
178    [DllImport(X64Dll, EntryPoint = "igraph_rng_seed", CallingConvention = CallingConvention.Cdecl)]
179    private static extern int igraph_rng_seed_x64(IntPtr rng, uint seed);
180    #endregion
181    #endregion
182
183    #region igraph_vector
184    internal static int igraph_vector_init(igraph_vector_t vector, int length) {
185      return X86 ? igraph_vector_init_x86(vector, length) : igraph_vector_init_x64(vector, length);
186    }
187    internal static int igraph_vector_init_copy(igraph_vector_t vector, double[] vec) {
188      return X86 ? igraph_vector_init_copy_x86(vector, vec, vec.Length) : igraph_vector_init_copy_x64(vector, vec, vec.Length);
189    }
190    internal static void igraph_vector_destroy(igraph_vector_t vector) {
191      if (X86) igraph_vector_destroy_x86(vector);
192      else igraph_vector_destroy_x64(vector);
193    }
194    internal static int igraph_vector_copy(igraph_vector_t to, igraph_vector_t from) {
195      return X86 ? igraph_vector_copy_x86(to, from) : igraph_vector_copy_x64(to, from);
196    }
197    internal static double[] igraph_vector_to_array(igraph_vector_t from) {
198      var len = igraph_vector_size(from);
199      var result = new double[len];
200      if (X86) igraph_vector_copy_to_x86(from, result);
201      else igraph_vector_copy_to_x64(from, result);
202      return result;
203    }
204
205    internal static int igraph_vector_size(igraph_vector_t vector) {
206      return X86 ? igraph_vector_size_x86(vector) : igraph_vector_size_x64(vector);
207    }
208
209    internal static double igraph_vector_e(igraph_vector_t vector, int index) {
210      return X86 ? igraph_vector_e_x86(vector, index) : igraph_vector_e_x64(vector, index);
211    }
212
213    internal static void igraph_vector_set(igraph_vector_t vector, int index, double value) {
214      if (X86) igraph_vector_set_x86(vector, index, value);
215      else igraph_vector_set_x64(vector, index, value);
216    }
217    internal static void igraph_vector_fill(igraph_vector_t vector, double v) {
218      if (X86) igraph_vector_fill_x86(vector, v);
219      else igraph_vector_fill_x64(vector, v);
220    }
221    internal static void igraph_vector_scale(igraph_vector_t vector, double by) {
222      if (X86) igraph_vector_scale_x86(vector, by);
223      else igraph_vector_scale_x64(vector, by);
224    }
225
226    internal static int igraph_vector_reverse(igraph_vector_t vector) {
227      return X86 ? igraph_vector_reverse_x86(vector) : igraph_vector_reverse_x64(vector);
228    }
229    internal static int igraph_vector_shuffle(igraph_vector_t vector) {
230      return X86 ? igraph_vector_shuffle_x86(vector) : igraph_vector_shuffle_x64(vector);
231    }
232
233    #region Platform specific DLL imports
234    [DllImport(X86Dll, EntryPoint = "igraph_vector_init", CallingConvention = CallingConvention.Cdecl)]
235    private static extern int igraph_vector_init_x86([In, Out]igraph_vector_t vector, int length);
236    [DllImport(X64Dll, EntryPoint = "igraph_vector_init", CallingConvention = CallingConvention.Cdecl)]
237    private static extern int igraph_vector_init_x64([In, Out]igraph_vector_t vector, int length);
238    [DllImport(X86Dll, EntryPoint = "igraph_vector_init_copy", CallingConvention = CallingConvention.Cdecl)]
239    private static extern int igraph_vector_init_copy_x86([In, Out]igraph_vector_t vector, double[] vec, int length);
240    [DllImport(X64Dll, EntryPoint = "igraph_vector_init_copy", CallingConvention = CallingConvention.Cdecl)]
241    private static extern int igraph_vector_init_copy_x64([In, Out]igraph_vector_t vector, double[] vec, int length);
242    [DllImport(X86Dll, EntryPoint = "igraph_vector_destroy", CallingConvention = CallingConvention.Cdecl)]
243    private static extern void igraph_vector_destroy_x86([In, Out]igraph_vector_t vector);
244    [DllImport(X64Dll, EntryPoint = "igraph_vector_destroy", CallingConvention = CallingConvention.Cdecl)]
245    private static extern void igraph_vector_destroy_x64([In, Out]igraph_vector_t vector);
246    [DllImport(X86Dll, EntryPoint = "igraph_vector_size", CallingConvention = CallingConvention.Cdecl)]
247    private static extern int igraph_vector_size_x86(igraph_vector_t vector);
248    [DllImport(X64Dll, EntryPoint = "igraph_vector_size", CallingConvention = CallingConvention.Cdecl)]
249    private static extern int igraph_vector_size_x64(igraph_vector_t vector);
250    [DllImport(X86Dll, EntryPoint = "igraph_vector_e", CallingConvention = CallingConvention.Cdecl)]
251    private static extern double igraph_vector_e_x86(igraph_vector_t vector, int index);
252    [DllImport(X64Dll, EntryPoint = "igraph_vector_e", CallingConvention = CallingConvention.Cdecl)]
253    private static extern double igraph_vector_e_x64(igraph_vector_t vector, int index);
254    [DllImport(X86Dll, EntryPoint = "igraph_vector_set", CallingConvention = CallingConvention.Cdecl)]
255    private static extern double igraph_vector_set_x86([In, Out]igraph_vector_t vector, int index, double value);
256    [DllImport(X64Dll, EntryPoint = "igraph_vector_set", CallingConvention = CallingConvention.Cdecl)]
257    private static extern double igraph_vector_set_x64([In, Out]igraph_vector_t vector, int index, double value);
258    [DllImport(X86Dll, EntryPoint = "igraph_vector_copy", CallingConvention = CallingConvention.Cdecl)]
259    private static extern int igraph_vector_copy_x86([In, Out]igraph_vector_t to, igraph_vector_t from);
260    [DllImport(X64Dll, EntryPoint = "igraph_vector_copy", CallingConvention = CallingConvention.Cdecl)]
261    private static extern int igraph_vector_copy_x64([In, Out]igraph_vector_t to, igraph_vector_t from);
262    [DllImport(X86Dll, EntryPoint = "igraph_vector_copy_to", CallingConvention = CallingConvention.Cdecl)]
263    private static extern void igraph_vector_copy_to_x86(igraph_vector_t from, [In, Out]double[] to);
264    [DllImport(X64Dll, EntryPoint = "igraph_vector_copy_to", CallingConvention = CallingConvention.Cdecl)]
265    private static extern void igraph_vector_copy_to_x64(igraph_vector_t from, [In, Out]double[] to);
266    [DllImport(X86Dll, EntryPoint = "igraph_vector_fill", CallingConvention = CallingConvention.Cdecl)]
267    private static extern int igraph_vector_fill_x86([In, Out]igraph_vector_t vector, double v);
268    [DllImport(X64Dll, EntryPoint = "igraph_vector_fill", CallingConvention = CallingConvention.Cdecl)]
269    private static extern int igraph_vector_fill_x64([In, Out]igraph_vector_t vector, double v);
270    [DllImport(X86Dll, EntryPoint = "igraph_vector_reverse", CallingConvention = CallingConvention.Cdecl)]
271    private static extern int igraph_vector_reverse_x86([In, Out]igraph_vector_t vector);
272    [DllImport(X64Dll, EntryPoint = "igraph_vector_reverse", CallingConvention = CallingConvention.Cdecl)]
273    private static extern int igraph_vector_reverse_x64([In, Out]igraph_vector_t vector);
274    [DllImport(X86Dll, EntryPoint = "igraph_vector_shuffle", CallingConvention = CallingConvention.Cdecl)]
275    private static extern int igraph_vector_shuffle_x86([In, Out]igraph_vector_t vector);
276    [DllImport(X64Dll, EntryPoint = "igraph_vector_shuffle", CallingConvention = CallingConvention.Cdecl)]
277    private static extern int igraph_vector_shuffle_x64([In, Out]igraph_vector_t vector);
278    [DllImport(X86Dll, EntryPoint = "igraph_vector_scale", CallingConvention = CallingConvention.Cdecl)]
279    private static extern void igraph_vector_scale_x86([In, Out]igraph_vector_t vector, double by);
280    [DllImport(X64Dll, EntryPoint = "igraph_vector_scale", CallingConvention = CallingConvention.Cdecl)]
281    private static extern void igraph_vector_scale_x64([In, Out]igraph_vector_t vector, double by);
282    #endregion
283    #endregion
284
285    #region igraph_matrix
286    internal static int igraph_matrix_init(igraph_matrix_t matrix, int nrows, int ncols) {
287      return X86 ? igraph_matrix_init_x86(matrix, nrows, ncols) : igraph_matrix_init_x64(matrix, nrows, ncols);
288    }
289    internal static void igraph_matrix_destroy(igraph_matrix_t matrix) {
290      if (X86) igraph_matrix_destroy_x86(matrix);
291      else igraph_matrix_destroy_x64(matrix);
292    }
293    internal static int igraph_matrix_copy(igraph_matrix_t to, igraph_matrix_t from) {
294      return X86 ? igraph_matrix_copy_x86(to, from) : igraph_matrix_copy_x64(to, from);
295    }
296
297    internal static double igraph_matrix_e(igraph_matrix_t matrix, int row, int col) {
298      return X86 ? igraph_matrix_e_x86(matrix, row, col) : igraph_matrix_e_x64(matrix, row, col);
299    }
300
301    internal static void igraph_matrix_set(igraph_matrix_t matrix, int row, int col, double value) {
302      if (X86) igraph_matrix_set_x86(matrix, row, col, value);
303      else igraph_matrix_set_x64(matrix, row, col, value);
304    }
305
306    internal static void igraph_matrix_fill(igraph_matrix_t matrix, double v) {
307      if (X86) igraph_matrix_fill_x86(matrix, v);
308      else igraph_matrix_fill_x64(matrix, v);
309    }
310
311    internal static int igraph_matrix_transpose(igraph_matrix_t matrix) {
312      return X86 ? igraph_matrix_transpose_x86(matrix) : igraph_matrix_transpose_x64(matrix);
313    }
314
315    internal static void igraph_matrix_scale(igraph_matrix_t matrix, double by) {
316      if (X86) igraph_matrix_scale_x86(matrix, by);
317      else igraph_matrix_scale_x64(matrix, by);
318    }
319
320    #region Platform specific DLL imports
321    [DllImport(X86Dll, EntryPoint = "igraph_matrix_init", CallingConvention = CallingConvention.Cdecl)]
322    private static extern int igraph_matrix_init_x86([In, Out]igraph_matrix_t matrix, int nrow, int ncol);
323    [DllImport(X64Dll, EntryPoint = "igraph_matrix_init", CallingConvention = CallingConvention.Cdecl)]
324    private static extern int igraph_matrix_init_x64([In, Out]igraph_matrix_t matrix, int nrow, int ncol);
325    [DllImport(X86Dll, EntryPoint = "igraph_matrix_destroy", CallingConvention = CallingConvention.Cdecl)]
326    private static extern void igraph_matrix_destroy_x86([In, Out]igraph_matrix_t matrix);
327    [DllImport(X64Dll, EntryPoint = "igraph_matrix_destroy", CallingConvention = CallingConvention.Cdecl)]
328    private static extern void igraph_matrix_destroy_x64([In, Out]igraph_matrix_t matrix);
329    [DllImport(X86Dll, EntryPoint = "igraph_matrix_e", CallingConvention = CallingConvention.Cdecl)]
330    private static extern double igraph_matrix_e_x86(igraph_matrix_t matrix, int row, int col);
331    [DllImport(X64Dll, EntryPoint = "igraph_matrix_e", CallingConvention = CallingConvention.Cdecl)]
332    private static extern double igraph_matrix_e_x64(igraph_matrix_t matrix, int row, int col);
333    [DllImport(X86Dll, EntryPoint = "igraph_matrix_set", CallingConvention = CallingConvention.Cdecl)]
334    private static extern double igraph_matrix_set_x86([In, Out]igraph_matrix_t matrix, int row, int col, double value);
335    [DllImport(X64Dll, EntryPoint = "igraph_matrix_set", CallingConvention = CallingConvention.Cdecl)]
336    private static extern double igraph_matrix_set_x64([In, Out]igraph_matrix_t matrix, int row, int col, double value);
337    [DllImport(X86Dll, EntryPoint = "igraph_matrix_copy", CallingConvention = CallingConvention.Cdecl)]
338    private static extern int igraph_matrix_copy_x86([In, Out]igraph_matrix_t to, igraph_matrix_t from);
339    [DllImport(X64Dll, EntryPoint = "igraph_matrix_copy", CallingConvention = CallingConvention.Cdecl)]
340    private static extern int igraph_matrix_copy_x64([In, Out]igraph_matrix_t to, igraph_matrix_t from);
341    [DllImport(X86Dll, EntryPoint = "igraph_matrix_fill", CallingConvention = CallingConvention.Cdecl)]
342    private static extern void igraph_matrix_fill_x86([In, Out]igraph_matrix_t matrix, double v);
343    [DllImport(X64Dll, EntryPoint = "igraph_matrix_fill", CallingConvention = CallingConvention.Cdecl)]
344    private static extern void igraph_matrix_fill_x64([In, Out]igraph_matrix_t matrix, double v);
345    [DllImport(X86Dll, EntryPoint = "igraph_matrix_transpose", CallingConvention = CallingConvention.Cdecl)]
346    private static extern int igraph_matrix_transpose_x86([In, Out]igraph_matrix_t matrix);
347    [DllImport(X64Dll, EntryPoint = "igraph_matrix_transpose", CallingConvention = CallingConvention.Cdecl)]
348    private static extern int igraph_matrix_transpose_x64([In, Out]igraph_matrix_t matrix);
349    [DllImport(X86Dll, EntryPoint = "igraph_matrix_scale", CallingConvention = CallingConvention.Cdecl)]
350    private static extern int igraph_matrix_scale_x86([In, Out]igraph_matrix_t matrix, double by);
351    [DllImport(X64Dll, EntryPoint = "igraph_matrix_scale", CallingConvention = CallingConvention.Cdecl)]
352    private static extern int igraph_matrix_scale_x64([In, Out]igraph_matrix_t matrix, double by);
353    #endregion
354    #endregion
355
356    #region igraph_layout
357    internal static int igraph_layout_fruchterman_reingold(igraph_t graph, igraph_matrix_t res, bool use_seed, int niter, double start_temp, igraph_layout_grid_t grid, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy) {
358      return X86 ? igraph_layout_fruchterman_reingold_x86(graph, res, use_seed, niter, start_temp, grid, weights, minx, maxx, miny, maxy) : igraph_layout_fruchterman_reingold_x64(graph, res, use_seed, niter, start_temp, grid, weights, minx, maxx, miny, maxy);
359    }
360    internal static int igraph_layout_kamada_kawai(igraph_t graph, igraph_matrix_t res, bool use_seed, int maxiter, double epsilon, double kkconst, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy) {
361      return X86 ? igraph_layout_kamada_kawai_x86(graph, res, use_seed, maxiter, epsilon, kkconst, weights, minx, maxx, miny, maxy) : igraph_layout_kamada_kawai_x64(graph, res, use_seed, maxiter, epsilon, kkconst, weights, minx, maxx, miny, maxy);
362    }
363    internal static int igraph_layout_davidson_harel(igraph_t graph, igraph_matrix_t res, bool use_seed, int maxiter, int fineiter, double cool_fact, double weight_node_dist, double weight_border, double weight_edge_lengths, double weight_edge_crossings, double weight_node_edge_dist) {
364      return X86 ? igraph_layout_davidson_harel_x86(graph, res, use_seed, maxiter, fineiter, cool_fact, weight_node_dist, weight_border, weight_edge_lengths, weight_edge_crossings, weight_node_edge_dist) : igraph_layout_davidson_harel_x64(graph, res, use_seed, maxiter, fineiter, cool_fact, weight_node_dist, weight_border, weight_edge_lengths, weight_edge_crossings, weight_node_edge_dist);
365    }
366    internal static int igraph_layout_mds(igraph_t graph, igraph_matrix_t res, igraph_matrix_t dist = null, int dim = 2) {
367      return MarshalIfExistsAndCall(GetDefaultArpackOptions(), ptr => X86 ? igraph_layout_mds_x86(graph, res, dist, dim, ptr) : igraph_layout_mds_x64(graph, res, dist, dim, ptr));
368    }
369
370    #region Platform specific DLL imports
371    [DllImport(X86Dll, EntryPoint = "igraph_layout_fruchterman_reingold", CallingConvention = CallingConvention.Cdecl)]
372    private static extern int igraph_layout_fruchterman_reingold_x86(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int niter, double start_temp, igraph_layout_grid_t grid, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy);
373    [DllImport(X64Dll, EntryPoint = "igraph_layout_fruchterman_reingold", CallingConvention = CallingConvention.Cdecl)]
374    private static extern int igraph_layout_fruchterman_reingold_x64(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int niter, double start_temp, igraph_layout_grid_t grid, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy);
375    [DllImport(X86Dll, EntryPoint = "igraph_layout_kamada_kawai", CallingConvention = CallingConvention.Cdecl)]
376    private static extern int igraph_layout_kamada_kawai_x86(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int maxiter, double epsilon, double kkconst, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy);
377    [DllImport(X64Dll, EntryPoint = "igraph_layout_kamada_kawai", CallingConvention = CallingConvention.Cdecl)]
378    private static extern int igraph_layout_kamada_kawai_x64(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int maxiter, double epsilon, double kkconst, igraph_vector_t weights, igraph_vector_t minx, igraph_vector_t maxx, igraph_vector_t miny, igraph_vector_t maxy);
379    [DllImport(X86Dll, EntryPoint = "igraph_layout_davidson_harel", CallingConvention = CallingConvention.Cdecl)]
380    private static extern int igraph_layout_davidson_harel_x86(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int maxiter, int fineiter, double cool_fact, double weight_node_dist, double weight_border, double weight_edge_lengths, double weight_edge_crossings, double weight_node_edge_dist);
381    [DllImport(X64Dll, EntryPoint = "igraph_layout_davidson_harel", CallingConvention = CallingConvention.Cdecl)]
382    private static extern int igraph_layout_davidson_harel_x64(igraph_t graph, [In, Out]igraph_matrix_t res, bool use_seed, int maxiter, int fineiter, double cool_fact, double weight_node_dist, double weight_border, double weight_edge_lengths, double weight_edge_crossings, double weight_node_edge_dist);
383    [DllImport(X86Dll, EntryPoint = "igraph_layout_mds", CallingConvention = CallingConvention.Cdecl)]
384    private static extern int igraph_layout_mds_x86(igraph_t graph, [In, Out]igraph_matrix_t res, igraph_matrix_t dist, int dim, IntPtr options);
385    [DllImport(X64Dll, EntryPoint = "igraph_layout_mds", CallingConvention = CallingConvention.Cdecl)]
386    private static extern int igraph_layout_mds_x64(igraph_t graph, [In, Out]igraph_matrix_t res, igraph_matrix_t dist, int dim, IntPtr options);
387    #endregion
388    #endregion
389
390    #region igraph_iterators
391    internal static int igraph_vs_all(ref igraph_vs_t vs) {
392      return X86 ? igraph_vs_all_x86(ref vs) : igraph_vs_all_x64(ref vs);
393    }
394    internal static void igraph_vs_destroy(ref igraph_vs_t vs) {
395      if (X86) igraph_vs_destroy_x86(ref vs);
396      else igraph_vs_destroy_x64(ref vs);
397    }
398
399    #region Platform specific DLL imports
400    [DllImport(X86Dll, EntryPoint = "igraph_vs_all", CallingConvention = CallingConvention.Cdecl)]
401    private static extern int igraph_vs_all_x86([In, Out]ref igraph_vs_t vs);
402    [DllImport(X64Dll, EntryPoint = "igraph_vs_all", CallingConvention = CallingConvention.Cdecl)]
403    private static extern int igraph_vs_all_x64([In, Out]ref igraph_vs_t vs);
404    [DllImport(X86Dll, EntryPoint = "igraph_vs_destroy", CallingConvention = CallingConvention.Cdecl)]
405    private static extern void igraph_vs_destroy_x86([In, Out]ref igraph_vs_t vs);
406    [DllImport(X64Dll, EntryPoint = "igraph_vs_destroy", CallingConvention = CallingConvention.Cdecl)]
407    private static extern void igraph_vs_destroy_x64([In, Out]ref igraph_vs_t vs);
408    #endregion
409    #endregion
410
411    private static int MarshalIfExistsAndCall(object o, Func<IntPtr, int> call) {
412      var ptr = IntPtr.Zero;
413      if (o != null) {
414        try {
415          ptr = Marshal.AllocHGlobal(Marshal.SizeOf(o));
416        } catch (OutOfMemoryException e) { throw new InvalidOperationException("Not enough memory to perform operation.", e); }
417        Marshal.StructureToPtr(o, ptr, false);
418      }
419      try {
420        return call(ptr);
421      } finally {
422        if (o != null) {
423          Marshal.DestroyStructure(ptr, o.GetType());
424          Marshal.FreeHGlobal(ptr);
425        }
426      }
427    }
428
429    private static void MarshalIfExistsAndCall(object o, Action<IntPtr> call) {
430      var ptr = IntPtr.Zero;
431      if (o != null) {
432        try {
433          ptr = Marshal.AllocHGlobal(Marshal.SizeOf(o));
434        } catch (OutOfMemoryException e) { throw new InvalidOperationException("Not enough memory to perform operation.", e); }
435        Marshal.StructureToPtr(o, ptr, false);
436      }
437      try {
438        call(ptr);
439      } finally {
440        if (o != null) {
441          Marshal.DestroyStructure(ptr, o.GetType());
442          Marshal.FreeHGlobal(ptr);
443        }
444      }
445    }
446  }
447}
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