/usr/include/irstlm/mixture.h is in libirstlm-dev 6.00.05-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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IrstLM: IRST Language Model Toolkit
Copyright (C) 2006 Marcello Federico, ITC-irst Trento, Italy
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
// Mixture of linear interpolation LMs
#ifndef LM_MIXTURE
#define LM_MIXTURE
namespace irstlm {
class mixture: public mdiadaptlm
{
double** l[MAX_NGRAM]; //interpolation parameters
int* pm; //parameter mappings
int pmax; //#parameters
int k1,k2; //two thresholds
int numslm;
int prunethresh;
interplm** sublm;
char *ipfname;
char *opfname;
double reldist(double *l1,double *l2,int n);
int genpmap();
int pmap(ngram ng,int lev);
public:
bool usefulltable;
mixture(bool fulltable,char *sublminfo,int depth,int prunefreq=0,char* ipfile=NULL,char* opfile=NULL);
int train();
int savepar(char* opf);
int loadpar(char* opf);
inline int dub() {
return dict->dub();
}
inline int dub(int value) {
for (int i=0; i<numslm; i++) {
sublm[i]->dub(value);
}
return dict->dub(value);
}
void settying(int a,int b) {
k1=a;
k2=b;
}
int discount(ngram ng,int size,double& fstar,double& lambda,int cv=0);
~mixture(){
for (int i=0;i<=lmsize();i++){
for (int j=0; j<pmax; j++) free(l[i][j]);
free(l[i]);
}
for (int i=0;i<numslm;i++) delete(sublm[i]);
}
//this extension builds a commong ngramtable on demand
int get(ngram& ng,int n,int lev);
};
}//namespace irstlm
#endif
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