Merged tests/*, matlab/*, utils/* from SVN head...
[libdai.git] / matlab / dai_readfg.cpp
1 /* Copyright (C) 2006-2008 Joris Mooij [j dot mooij at science dot ru dot nl]
2 Radboud University Nijmegen, The Netherlands
3
4 This file is part of libDAI.
5
6 libDAI is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 libDAI is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with libDAI; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21
22 /*=================================================================*
23 * *
24 * This is a MEX-file for MATLAB. *
25 * *
26 * [psi] = dai_readfg(filename); *
27 * *
28 *=================================================================*/
29
30
31 #include <iostream>
32 #include "mex.h"
33 #include <dai/matlab/matlab.h>
34 #include <dai/factorgraph.h>
35
36
37 using namespace std;
38 using namespace dai;
39
40
41 /* Input Arguments */
42
43 #define FILENAME_IN prhs[0]
44 #define NR_IN 1
45
46
47 /* Output Arguments */
48
49 #define PSI_OUT plhs[0]
50 #define NR_OUT 1
51
52
53 void mexFunction( int nlhs, mxArray *plhs[], int nrhs, const mxArray*prhs[] )
54 {
55 char *filename;
56
57
58 // Check for proper number of arguments
59 if ((nrhs != NR_IN) || (nlhs != NR_OUT)) {
60 mexErrMsgTxt("Usage: [psi] = dai_readfg(filename);\n\n"
61 "\n"
62 "INPUT: filename = filename of a .fg file\n"
63 "\n"
64 "OUTPUT: psi = linear cell array containing the factors\n"
65 " (psi{i} is a structure with a Member field\n"
66 " and a P field, like a CPTAB).\n");
67 }
68
69 // Get input parameters
70 size_t buflen;
71 buflen = mxGetN( FILENAME_IN ) + 1;
72 filename = (char *)mxCalloc( buflen, sizeof(char) );
73 mxGetString( FILENAME_IN, filename, buflen );
74
75
76 // Read factorgraph
77 FactorGraph fg;
78 try {
79 fg.ReadFromFile( filename );
80 } catch( std::exception &e ) {
81 mexErrMsgTxt( e.what() );
82 }
83
84
85 // Save factors
86 vector<Factor> psi;
87 for( size_t I = 0; I < fg.nrFactors(); I++ )
88 psi.push_back(fg.factor(I));
89
90
91 // Hand over results to MATLAB
92 PSI_OUT = Factors2mx(psi);
93
94
95 return;
96 }