fst-parse2.C
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/*******************************************************************/
/* */
/* FILE fst-parse.C */
/* MODULE fst-parse */
/* PROGRAM SFST */
/* AUTHOR Helmut Schmid, IMS, University of Stuttgart */
/* */
/*******************************************************************/
#include "fst.h"
using std::cerr;
using std::cout;
using std::vector;
#define BUFFER_SIZE 10000
bool Debug=false;
bool Verbose=false;
vector<char*> TFileNames;
/*******************************************************************/
/* */
/* usage */
/* */
/*******************************************************************/
void usage()
{
cerr << "\nUsage: fst-parse [options] transducer [infile]\n\n";
cerr << "Options:\n";
cerr << "-t t: compose transducer t\n";
cerr << "-h: print this message\n";
cerr << "-q: suppress status messages\n";
cerr << "-d: print debugging output\n";
exit(1);
}
/*******************************************************************/
/* */
/* get_flags */
/* */
/*******************************************************************/
void get_flags( int *argc, char **argv )
{
for( int i=1; i<*argc; i++ ) {
if (strcmp(argv[i],"-q") == 0) {
Verbose = false;
argv[i] = NULL;
}
else if (strcmp(argv[i],"-h") == 0) {
usage();
argv[i] = NULL;
}
else if (strcmp(argv[i],"-d") == 0) {
Debug = true;
argv[i] = NULL;
}
else if (i < (*argc)-1 && strcmp(argv[i],"-t") == 0) {
TFileNames.push_back(argv[i+1]);
argv[i++] = NULL;
argv[i] = NULL;
}
}
// remove flags from the argument list
int k;
for( int i=k=1; i<*argc; i++)
if (argv[i] != NULL)
argv[k++] = argv[i];
*argc = k;
}
/*******************************************************************/
/* */
/* main */
/* */
/*******************************************************************/
int main( int argc, char **argv )
{
FILE *file;
get_flags(&argc, argv);
if (argc < 2 || argc > 3)
usage();
TFileNames.push_back(argv[1]);
vector<Transducer*> a;
try {
for( size_t i=0; i<TFileNames.size(); i++ ) {
if ((file = fopen(TFileNames[i],"rb")) == NULL) {
fprintf(stderr,"\nError: Cannot open transducer file \"%s\"\n\n",
TFileNames[i]);
exit(1);
}
if (Verbose)
fprintf(stderr,"reading transducer %s ...", TFileNames[i]);
a.push_back(new Transducer(file));
fclose(file);
if (Verbose)
fputs("finished.\n",stderr);
}
if (argc <= 2)
file = stdin;
else {
if ((file = fopen(argv[2],"rt")) == NULL) {
fprintf(stderr,"Error: Cannot open input file %s\n\n", argv[2]);
exit(1);
}
}
char buffer[BUFFER_SIZE];
while (fgets(buffer, BUFFER_SIZE, file)) {
int l=(int)strlen(buffer)-1;
if (buffer[l] == '\n')
buffer[l] = '\0';
Transducer *t = new Transducer(buffer, &a.back()->alphabet, false);
for( int i=(int)a.size()-1; i>=0; i-- ) {
if (Debug) {
cerr << "\n";
cerr << *t;
}
Transducer *t2 = &(*a[i] || *t);
delete t;
t = t2;
}
Transducer *t2 = &t->lower_level();
delete t;
t = &t2->minimise();
delete t2;
if (Debug) {
cerr << "result:\n";
cerr << *t;
}
t->alphabet.copy(a[0]->alphabet);
cout << *t;
delete t;
}
}
catch (const char *p) {
cerr << p << "\n";
return 1;
}
return 0;
}