mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-26 05:14:36 +03:00
519 lines
13 KiB
C++
519 lines
13 KiB
C++
// $Id$
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#include <cassert>
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#include <iomanip>
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <stdexcept>
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#include <string>
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#include <list>
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#include <vector>
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#include <set>
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#include <algorithm>
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#include <cstring>
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#include "cmd.h"
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using namespace std;
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const int MAX_WORD = 10000; // maximum lengthsource/target strings
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const int MAX_M = 400; // maximum length of source strings
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const int MAX_N = 400; // maximum length of target strings
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enum Alignment {
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UNION = 1,
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INTERSECT,
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GROW,
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SRCTOTGT,
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TGTTOSRC,
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};
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const Enum_T END_ENUM = {0, 0};
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namespace
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{
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Enum_T AlignEnum [] = {
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{ "union", UNION },
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{ "u", UNION },
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{ "intersect", INTERSECT},
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{ "i", INTERSECT},
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{ "grow", GROW },
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{ "g", GROW },
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{ "srctotgt", SRCTOTGT },
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{ "s2t", SRCTOTGT },
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{ "tgttosrc", TGTTOSRC },
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{ "t2s", TGTTOSRC },
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END_ENUM
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};
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Enum_T BoolEnum [] = {
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{ "true", true },
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{ "yes", true },
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{ "y", true },
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{ "false", false },
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{ "no", false },
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{ "n", false },
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END_ENUM
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};
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// global variables and constants
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int* fa; //counters of covered foreign positions
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int* ea; //counters of covered english positions
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int** A; //alignment matrix with information symmetric/direct/inverse alignments
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int verbose=0;
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//read an alignment pair from the input stream.
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int lc = 0;
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int getals(istream& inp,int& m, int *a,int& n, int *b)
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{
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char w[MAX_WORD], dummy[10];
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int i,j,freq;
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if (inp >> freq) {
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++lc;
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//target sentence
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inp >> n;
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assert(n<MAX_N);
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for (i=1; i<=n; i++) {
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inp >> setw(MAX_WORD) >> w;
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if (strlen(w)>=MAX_WORD-1) {
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cerr << lc << ": target len=" << strlen(w) << " is not less than MAX_WORD-1="
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<< MAX_WORD-1 << endl;
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assert(strlen(w)<MAX_WORD-1);
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}
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}
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inp >> dummy; //# separator
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// inverse alignment
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for (i=1; i<=n; i++) inp >> b[i];
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//source sentence
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inp >> m;
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assert(m<MAX_M);
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for (j=1; j<=m; j++) {
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inp >> setw(MAX_WORD) >> w;
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if (strlen(w)>=MAX_WORD-1) {
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cerr << lc << ": source len=" << strlen(w) << " is not less than MAX_WORD-1="
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<< MAX_WORD-1 << endl;
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assert(strlen(w)<MAX_WORD-1);
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}
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}
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inp >> dummy; //# separator
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// direct alignment
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for (j=1; j<=m; j++) {
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inp >> a[j];
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assert(0<=a[j] && a[j]<=n);
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}
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//check inverse alignemnt
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for (i=1; i<=n; i++)
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assert(0<=b[i] && b[i]<=m);
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return 1;
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} else
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return 0;
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}
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//compute union alignment
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int prunionalignment(ostream& out,int m,int *a,int n,int* b)
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{
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ostringstream sout;
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for (int j=1; j<=m; j++)
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if (a[j])
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sout << j-1 << "-" << a[j]-1 << " ";
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for (int i=1; i<=n; i++)
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if (b[i] && a[b[i]]!=i)
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sout << b[i]-1 << "-" << i-1 << " ";
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//fix the last " "
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string str = sout.str();
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if (str.length() == 0)
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str = "\n";
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else
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str.replace(str.length()-1,1,"\n");
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out << str;
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out.flush();
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return 1;
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}
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//Compute intersection alignment
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int printersect(ostream& out,int m,int *a,int n,int* b)
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{
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ostringstream sout;
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for (int j=1; j<=m; j++)
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if (a[j] && b[a[j]]==j)
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sout << j-1 << "-" << a[j]-1 << " ";
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//fix the last " "
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string str = sout.str();
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if (str.length() == 0)
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str = "\n";
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else
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str.replace(str.length()-1,1,"\n");
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out << str;
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out.flush();
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return 1;
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}
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//Compute target-to-source alignment
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int printtgttosrc(ostream& out,int m,int *a,int n,int* b)
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{
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ostringstream sout;
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for (int i=1; i<=n; i++)
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if (b[i])
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sout << b[i]-1 << "-" << i-1 << " ";
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//fix the last " "
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string str = sout.str();
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if (str.length() == 0)
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str = "\n";
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else
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str.replace(str.length()-1,1,"\n");
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out << str;
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out.flush();
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return 1;
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}
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//Compute source-to-target alignment
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int printsrctotgt(ostream& out,int m,int *a,int n,int* b)
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{
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ostringstream sout;
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for (int j=1; j<=m; j++)
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if (a[j])
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sout << j-1 << "-" << a[j]-1 << " ";
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//fix the last " "
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string str = sout.str();
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if (str.length() == 0)
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str = "\n";
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else
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str.replace(str.length()-1,1,"\n");
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out << str;
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out.flush();
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return 1;
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}
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//Compute Grow Diagonal Alignment
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//Nice property: you will never introduce more points
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//than the unionalignment alignemt. Hence, you will always be able
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//to represent the grow alignment as the unionalignment of a
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//directed and inverted alignment
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int printgrow(ostream& out,int m,int *a,int n,int* b, bool diagonal=false,bool isfinal=false,bool bothuncovered=false)
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{
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ostringstream sout;
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vector <pair <int,int> > neighbors; //neighbors
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pair <int,int> entry;
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neighbors.push_back(make_pair(-1,-0));
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neighbors.push_back(make_pair(0,-1));
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neighbors.push_back(make_pair(1,0));
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neighbors.push_back(make_pair(0,1));
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if (diagonal) {
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neighbors.push_back(make_pair(-1,-1));
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neighbors.push_back(make_pair(-1,1));
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neighbors.push_back(make_pair(1,-1));
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neighbors.push_back(make_pair(1,1));
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}
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int i,j;
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size_t o;
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//covered foreign and english positions
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memset(fa,0,(m+1)*sizeof(int));
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memset(ea,0,(n+1)*sizeof(int));
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//matrix to quickly check if one point is in the symmetric
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//alignment (value=2), direct alignment (=1) and inverse alignment
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for (int i=1; i<=n; i++) memset(A[i],0,(m+1)*sizeof(int));
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set <pair <int,int> > currentpoints; //symmetric alignment
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set <pair <int,int> > unionalignment; //union alignment
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pair <int,int> point; //variable to store points
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set<pair <int,int> >::const_iterator k; //iterator over sets
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//fill in the alignments
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for (j=1; j<=m; j++) {
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if (a[j]) {
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unionalignment.insert(make_pair(a[j],j));
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if (b[a[j]]==j) {
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fa[j]=1;
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ea[a[j]]=1;
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A[a[j]][j]=2;
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currentpoints.insert(make_pair(a[j],j));
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} else
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A[a[j]][j]=-1;
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}
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}
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for (i=1; i<=n; i++)
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if (b[i] && a[b[i]]!=i) { //not intersection
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unionalignment.insert(make_pair(i,b[i]));
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A[i][b[i]]=1;
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}
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int added=1;
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while (added) {
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added=0;
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///scan the current alignment
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for (k=currentpoints.begin(); k!=currentpoints.end(); k++) {
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//cout << "{"<< (k->second)-1 << "-" << (k->first)-1 << "}";
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for (o=0; o<neighbors.size(); o++) {
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//cout << "go over check all neighbors\n";
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point.first=k->first+neighbors[o].first;
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point.second=k->second+neighbors[o].second;
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//cout << point.second-1 << " " << point.first-1 << "\n";
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//check if neighbor is inside 'matrix'
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if (point.first>0 && point.first <=n && point.second>0 && point.second<=m)
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//check if neighbor is in the unionalignment alignment
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if (b[point.first]==point.second || a[point.second]==point.first) {
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//cout << "In unionalignment ";cout.flush();
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//check if it connects at least one uncovered word
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if (!(ea[point.first] && fa[point.second])) {
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//insert point in currentpoints!
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currentpoints.insert(point);
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A[point.first][point.second]=2;
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ea[point.first]=1;
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fa[point.second]=1;
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added=1;
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//cout << "added grow: " << point.second-1 << "-" << point.first-1 << "\n";cout.flush();
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}
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}
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}
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}
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}
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if (isfinal) {
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for (k=unionalignment.begin(); k!=unionalignment.end(); k++)
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if (A[k->first][k->second]==1) {
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point.first=k->first;
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point.second=k->second;
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//one of the two words is not covered yet
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//cout << "{" << point.second-1 << "-" << point.first-1 << "} ";
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if ((bothuncovered && !ea[point.first] && !fa[point.second]) ||
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(!bothuncovered && !(ea[point.first] && fa[point.second]))) {
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//add it!
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currentpoints.insert(point);
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A[point.first][point.second]=2;
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//keep track of new covered positions
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ea[point.first]=1;
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fa[point.second]=1;
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//added=1;
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//cout << "added final: " << point.second-1 << "-" << point.first-1 << "\n";
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}
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}
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for (k=unionalignment.begin(); k!=unionalignment.end(); k++)
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if (A[k->first][k->second]==-1) {
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point.first=k->first;
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point.second=k->second;
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//one of the two words is not covered yet
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//cout << "{" << point.second-1 << "-" << point.first-1 << "} ";
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if ((bothuncovered && !ea[point.first] && !fa[point.second]) ||
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(!bothuncovered && !(ea[point.first] && fa[point.second]))) {
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//add it!
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currentpoints.insert(point);
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A[point.first][point.second]=2;
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//keep track of new covered positions
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ea[point.first]=1;
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fa[point.second]=1;
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//added=1;
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//cout << "added final: " << point.second-1 << "-" << point.first-1 << "\n";
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}
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}
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}
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for (k=currentpoints.begin(); k!=currentpoints.end(); k++)
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sout << k->second-1 << "-" << k->first-1 << " ";
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//fix the last " "
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string str = sout.str();
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if (str.length() == 0)
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str = "\n";
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else
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str.replace(str.length()-1,1,"\n");
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out << str;
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out.flush();
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return 1;
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return 1;
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}
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} // namespace
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//Main file here
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int main(int argc, char** argv)
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{
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int alignment=0;
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char* input= NULL;
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char* output= NULL;
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int diagonal=false;
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int isfinal=false;
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int bothuncovered=false;
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DeclareParams("a", CMDENUMTYPE, &alignment, AlignEnum,
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"alignment", CMDENUMTYPE, &alignment, AlignEnum,
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"d", CMDENUMTYPE, &diagonal, BoolEnum,
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"diagonal", CMDENUMTYPE, &diagonal, BoolEnum,
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"f", CMDENUMTYPE, &isfinal, BoolEnum,
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"final", CMDENUMTYPE, &isfinal, BoolEnum,
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"b", CMDENUMTYPE, &bothuncovered, BoolEnum,
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"both", CMDENUMTYPE, &bothuncovered, BoolEnum,
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"i", CMDSTRINGTYPE, &input,
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"o", CMDSTRINGTYPE, &output,
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"v", CMDENUMTYPE, &verbose, BoolEnum,
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"verbose", CMDENUMTYPE, &verbose, BoolEnum,
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NULL);
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GetParams(&argc, &argv, NULL);
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if (alignment==0) {
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cerr << "usage: symal [-i=<inputfile>] [-o=<outputfile>] -a=[u|i|g] -d=[yes|no] -b=[yes|no] -f=[yes|no] \n"
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<< "Input file or std must be in .bal format (see script giza2bal.pl).\n";
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exit(1);
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}
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istream *inp = &std::cin;
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ostream *out = &std::cout;
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try {
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if (input) {
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fstream *fin = new fstream(input,ios::in);
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if (!fin->is_open()) throw runtime_error("cannot open " + string(input));
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inp = fin;
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}
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if (output) {
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fstream *fout = new fstream(output,ios::out);
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if (!fout->is_open()) throw runtime_error("cannot open " + string(output));
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out = fout;
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}
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int a[MAX_M],b[MAX_N],m,n;
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fa=new int[MAX_M+1];
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ea=new int[MAX_N+1];
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int sents = 0;
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A=new int *[MAX_N+1];
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for (int i=1; i<=MAX_N; i++) A[i]=new int[MAX_M+1];
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switch (alignment) {
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case UNION:
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cerr << "symal: computing union alignment\n";
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while(getals(*inp,m,a,n,b)) {
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prunionalignment(*out,m,a,n,b);
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sents++;
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}
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cerr << "Sents: " << sents << endl;
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break;
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case INTERSECT:
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cerr << "symal: computing intersect alignment\n";
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while(getals(*inp,m,a,n,b)) {
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printersect(*out,m,a,n,b);
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sents++;
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}
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cerr << "Sents: " << sents << endl;
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break;
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case GROW:
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cerr << "symal: computing grow alignment: diagonal ("
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<< diagonal << ") final ("<< isfinal << ")"
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<< "both-uncovered (" << bothuncovered <<")\n";
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while(getals(*inp,m,a,n,b))
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printgrow(*out,m,a,n,b,diagonal,isfinal,bothuncovered);
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break;
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case TGTTOSRC:
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cerr << "symal: computing target-to-source alignment\n";
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while(getals(*inp,m,a,n,b)) {
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printtgttosrc(*out,m,a,n,b);
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sents++;
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}
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cerr << "Sents: " << sents << endl;
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break;
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case SRCTOTGT:
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cerr << "symal: computing source-to-target alignment\n";
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while(getals(*inp,m,a,n,b)) {
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printsrctotgt(*out,m,a,n,b);
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sents++;
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}
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cerr << "Sents: " << sents << endl;
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break;
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default:
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throw runtime_error("Unknown alignment");
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}
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delete [] fa;
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delete [] ea;
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for (int i=1; i<=MAX_N; i++) delete [] A[i];
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delete [] A;
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if (inp != &std::cin) {
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delete inp;
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}
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if (out != &std::cout) {
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delete inp;
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}
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} catch (const std::exception &e) {
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cerr << e.what() << std::endl;
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exit(1);
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}
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exit(0);
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}
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