Esempio n. 1
0
static int fget_input_char(FILE *in, FILE *out, Command_Options* copts)
{
#ifdef HAVE_EDITLINE
	char * pline = fget_input_string(in, out, copts);
	if (NULL == pline) return EOF;
	if (*pline)
	{
		input_pending = true;
		return *pline;
	}
	return '\n';

#else
	int c;

	if (!copts->batch_mode && verbosity > 0)
		fprintf(out, "linkparser> ");
	fflush(out);

	/* For UTF-8 input, I think its still technically correct to
	 * use fgetc() and not fgetwc() at this point. */
	c = fgetc(in);
	if (c != '\n')
	{
		ungetc(c, in);
		input_pending = true;
	}
	return c;
#endif
}
Esempio n. 2
0
static int fget_input_char(FILE *in, FILE *out, Parse_Options opts)
{
#ifdef HAVE_EDITLINE
	char * pline = fget_input_string(in, out, opts);
	if (NULL == pline) return EOF;
	if (*pline)
	{
		input_pending = TRUE;
		return *pline;
	}
	return '\n';

#else
	int c;

	if (!parse_options_get_batch_mode(opts) && (verbosity > 0))
        /*############################################*/
       	//	fprintf(out, "linkparser> ");
        /*############################################*/
	fflush(out);

	/* For UTF-8 input, I think its still technically correct to
	 * use fgetc() and not fgetwc() at this point. */
	c = fgetc(in);
	if (c != '\n')
	{
		ungetc(c, in);
		input_pending = TRUE;
	}
	return c;
#endif
}
Esempio n. 3
0
int main(int argc, char * argv[])
{
	FILE            *input_fh = stdin;
	Dictionary      dict;
	const char     *language="en";  /* default to english, and not locale */
	int             num_linkages, i;
	Label           label = NO_LABEL;
	const char      *codeset;
	const char      *locale = NULL;
	Command_Options *copts;
	Parse_Options   opts;
	bool batch_in_progress = false;

#if LATER
	/* Try to catch the SIGWINCH ... except this is not working. */
	struct sigaction winch_act;
	winch_act.sa_handler = winch_handler;
	winch_act.sa_sigaction = NULL;
	sigemptyset (&winch_act.sa_mask);
	winch_act.sa_flags = 0;
	sigaction (SIGWINCH, &winch_act, NULL);
#endif

	i = 1;
	if ((argc > 1) && (argv[1][0] != '-')) {
		/* the dictionary is the first argument if it doesn't begin with "-" */
		language = argv[1];
		i++;
	}

#if !defined(_MSC_VER) && !defined(__MINGW32__)
	/* Get the locale from the environment...
	 * Perhaps we should someday get it from the dictionary ??
	 */
	locale = setlocale(LC_ALL, "");

	/* Check to make sure the current locale is UTF8; if its not,
	 * then force-set this to the english utf8 locale
	 */
	codeset = nl_langinfo(CODESET);
	if (!strstr(codeset, "UTF") && !strstr(codeset, "utf"))
	{
		fprintf(stderr,
		    "%s: Warning: locale %s was not UTF-8; force-setting to en_US.UTF-8\n",
		     argv[0], codeset);
		locale = setlocale(LC_CTYPE, "en_US.UTF-8");
	}
#else
 #pragma message("WARNING: Windows console (cmd.exe) does not support unicode input!\nWill attempt to convert from the native encoding!");
	fprintf(stderr,
	    "%s: Warning: Windows console (cmd.exe) does not support unicode\n"
	    "input!  Will attempt to convert from the native encoding!", argv[0]);
#endif

	for (; i<argc; i++)
	{
		if (argv[i][0] == '-' && strcmp("--version", argv[i]) == 0)
		{
			printf("Version: %s\n", linkgrammar_get_version());
			exit(0);
		}
	}

	copts = command_options_create();
	opts = copts->popts;
	if (copts == NULL || opts == NULL || copts->panic_opts == NULL)
	{
		fprintf(stderr, "%s: Fatal error: unable to create parse options\n", argv[0]);
		exit(-1);
	}

	if (language && *language)
		dict = dictionary_create_lang(language);
	else
		dict = dictionary_create_default_lang();

	if (dict == NULL)
	{
		fprintf(stderr, "%s: Fatal error: Unable to open dictionary.\n", argv[0]);
		exit(-1);
	}

	setup_panic_parse_options(copts->panic_opts);
	copts->panic_mode = true;

	parse_options_set_max_parse_time(opts, 30);
	parse_options_set_linkage_limit(opts, 1000);
	parse_options_set_min_null_count(opts, 0);
	parse_options_set_max_null_count(opts, 0);
	parse_options_set_short_length(opts, 16);

	/* The English and Russian dicts use a cost of 2.7, which allows
	 * regexes with a fractional cost of less than 1 to be used with
	 * rules that have a cost of 2.0.
	 */
	parse_options_set_disjunct_cost(opts, 2.7);

	/* Process the command line commands */
	for (i = 1; i<argc; i++)
	{
		if (argv[i][0] == '-')
		{
			int rc;
			if (argv[i][1] == '!' || argv[i][1] == '-')
				rc = issue_special_command(argv[i]+2, copts, dict);
			else
				rc = issue_special_command(argv[i]+1, copts, dict);

			if (rc)
				print_usage(argv[0]);
		}
	}

	check_winsize(copts);

#if !defined(_MSC_VER) && !defined(__MINGW32__)
	prt_error("Info: Using locale %s.", locale);
#endif
	prt_error("Info: Dictionary version %s.",
		linkgrammar_get_dict_version(dict));
	prt_error("Info: Library version %s. Enter \"!help\" for help.",
		linkgrammar_get_version());

	/* Main input loop */
	while (1)
	{
		char *input_string;
		Sentence sent = NULL;

		verbosity = parse_options_get_verbosity(opts);
		debug = parse_options_get_debug(opts);
		test = parse_options_get_test(opts);

		input_string = fget_input_string(input_fh, stdout, copts);
		check_winsize(copts);

		if (NULL == input_string)
		{
			if (input_fh == stdin) break;
			fclose (input_fh);
			input_fh = stdin;
			continue;
		}

		if ((strcmp(input_string, "!quit") == 0) ||
		    (strcmp(input_string, "!exit") == 0)) break;

		/* We have to handle the !file command inline; its too hairy
		 * otherwise ... */
		if (strncmp(input_string, "!file", 5) == 0)
		{
			char * filename = &input_string[6];
			input_fh = fopen(filename, "r");
			if (NULL == input_fh)
			{
				int perr = errno;
				fprintf(stderr, "Error: %s (%d) %s\n",
				        filename, perr, strerror(perr));
				input_fh = stdin;
				continue;
			}
			continue;
		}

		/* If the input string is just whitespace, then ignore it. */
		if (strspn(input_string, " \t\v") == strlen(input_string)) continue;

		if (special_command(input_string, copts, dict)) continue;

		if (!copts->batch_mode) batch_in_progress = false;
		if ('\0' != test[0])
		{
			/* In batch mode warn only once.
			 * In auto-next-linkage mode don't warn at all. */
			if (!batch_in_progress && (NULL == strstr(test, ",auto-next-linkage,")))
			{
				fflush(stdout);
				/* Remind the developer this is a test mode. */
				fprintf(stderr, "Warning: Tests enabled: %s\n", test);
				if (copts->batch_mode) batch_in_progress = true;
			}
		}
		
		if (copts->echo_on)
		{
			printf("%s\n", input_string);
		}

		if (copts->batch_mode)
		{
			label = strip_off_label(input_string);
		}

#ifdef USE_VITERBI
		/* Compile-time optional, for now, since it don't work yet. */
		if (parse_options_get_use_viterbi(opts))
		{
			viterbi_parse(input_string, dict);
		}
		else
#endif
		{
			sent = sentence_create(input_string, dict);

			/* First parse with cost 0 or 1 and no null links */
			// parse_options_set_disjunct_cost(opts, 2.7);
			parse_options_set_min_null_count(opts, 0);
			parse_options_set_max_null_count(opts, 0);
			parse_options_reset_resources(opts);

			num_linkages = sentence_parse(sent, opts);

			/* num_linkages is negative only on a hard-error;
			 * typically, due to a zero-length sentence.  */
			if (num_linkages < 0)
			{
				sentence_delete(sent);
				sent = NULL;
				continue;
			}
#if 0
			/* Try again, this time omitting the requirement for
			 * definite articles, etc. This should allow for the parsing
			 * of newspaper headlines and other clipped speech.
			 *
			 * XXX Unfortunately, this also allows for the parsing of
			 * all sorts of ungrammatical sentences which should not
			 * parse, and leads to bad parses of many other unparsable
			 * but otherwise grammatical sentences.  Thus, this trick
			 * pretty much fails; we leave it here to document the
			 * experiment.
			 */
			if (num_linkages == 0)
			{
				parse_options_set_disjunct_cost(opts, 4.5);
				num_linkages = sentence_parse(sent, opts);
				if (num_linkages < 0) continue;
			}
#endif

			/* Try using a larger list of disjuncts */
			/* XXX fixme: the lg_expand_disjunct_list() routine is not
			 * currently a part of the public API; it should be made so,
			 * or this expansion idea should be abandoned... not sure which.
			 */
			if ((num_linkages == 0) && parse_options_get_use_cluster_disjuncts(opts))
			{
				int expanded;
				if (verbosity > 0) fprintf(stdout, "No standard linkages, expanding disjunct set.\n");
				parse_options_set_disjunct_cost(opts, 3.9);
				expanded = lg_expand_disjunct_list(sent);
				if (expanded)
				{
					num_linkages = sentence_parse(sent, opts);
				}
				if (0 < num_linkages) printf("Got One !!!!!!!!!!!!!!!!!\n");
			}

			/* If asked to show bad linkages, then show them. */
			if ((num_linkages == 0) && (!copts->batch_mode))
			{
				if (copts->display_bad)
				{
					num_linkages = sentence_num_linkages_found(sent);
				}
			}

			/* Now parse with null links */
			if (num_linkages == 0 && !copts->batch_mode)
			{
				if (verbosity > 0) fprintf(stdout, "No complete linkages found.\n");

				if (copts->allow_null)
				{
					/* XXX should use expanded disjunct list here too */
					parse_options_set_min_null_count(opts, 1);
					parse_options_set_max_null_count(opts, sentence_length(sent));
					num_linkages = sentence_parse(sent, opts);
				}
			}

			if (verbosity > 0)
			{
				if (parse_options_timer_expired(opts))
					fprintf(stdout, "Timer is expired!\n");

				if (parse_options_memory_exhausted(opts))
					fprintf(stdout, "Memory is exhausted!\n");
			}

			if ((num_linkages == 0) &&
				copts->panic_mode &&
				parse_options_resources_exhausted(opts))
			{
				/* print_total_time(opts); */
				batch_errors++;
				if (verbosity > 0) fprintf(stdout, "Entering \"panic\" mode...\n");
				parse_options_reset_resources(copts->panic_opts);
				parse_options_set_verbosity(copts->panic_opts, verbosity);
				num_linkages = sentence_parse(sent, copts->panic_opts);
				if (verbosity > 0)
				{
					if (parse_options_timer_expired(copts->panic_opts))
						fprintf(stdout, "Panic timer is expired!\n");
				}
			}

			/* print_total_time(opts); */

			if (copts->batch_mode)
			{
				batch_process_some_linkages(label, sent, copts);
			}
			else
			{
				int c = process_some_linkages(sent, copts);
				if (c == EOF)
				{
					sentence_delete(sent);
					sent = NULL;
					break;
				}
			}
			fflush(stdout);

			sentence_delete(sent);
			sent = NULL;
		}
	}

	if (copts->batch_mode)
	{
		/* print_time(opts, "Total"); */
		fprintf(stderr,
				"%d error%s.\n", batch_errors, (batch_errors==1) ? "" : "s");
	}

	/* Free stuff, so that mem-leak detectors don't commplain. */
	command_options_delete(copts);
	dictionary_delete(dict);
	fget_input_string(NULL, NULL, NULL);

	printf ("Bye.\n");
	return 0;
}
Esempio n. 4
0
int main(int argc, char * argv[])
{
	FILE            *input_fh = stdin;
	Dictionary      dict;
	Sentence        sent;
	const char     *language="en";  /* default to english, and not locale */
	int             pp_on=TRUE;
	int             af_on=TRUE;
	int             cons_on=TRUE;
	int             num_linkages, i;
	char            *input_string;
	Label           label = NO_LABEL;
	const char      *codeset;
       /*############################################################################################*/
        int             num=0;
        FILE            *fp2,*fp_word_info,*fp_num,*fp_lname,*fp_rel,*fp_lcount,*fp_word_cat,*fp_word;
       /*##############################################################################################*/

	i = 1;
        /*############################################################################################*/
        if (argc > 4){
                 num =atoi(argv[4]);
                 num=num-1;
///             language = argv[1];
       /*####################################################################################*/
//
//	if ((argc > 1) && (argv[1][0] != '-')) {
		/* the dictionary is the first argument if it doesn't begin with "-" */
//		language = argv[1];
		i++;
	}
       /*################################*/
       language = argv[1];
       /*################################*/
 
	/* Get the locale from the environment... 
	 * perhaps we should someday get it from the dictionary ??
	 */
	setlocale(LC_ALL, "");

	/* Check to make sure the current locale is UTF8; if its not,
	 * then force-set this to the english utf8 locale 
	 */
	codeset = nl_langinfo(CODESET);
	if (!strstr(codeset, "UTF") && !strstr(codeset, "utf"))
	{
		setlocale(LC_CTYPE, "en_US.UTF-8");
	}
 /*########################################*/
	for (; i<argc-3; i++) {
 /*########################################*/
		if (argv[i][0] == '-') {
			if (strcmp("--version", argv[i])==0) {
				printf("Version: %s\n", linkgrammar_get_version());
				exit(0);
			} else if (strcmp("-ppoff", argv[i])==0) {
				pp_on = FALSE;
			} else if (strcmp("-coff", argv[i])==0) {
				cons_on = FALSE;
			} else if (strcmp("-aoff", argv[i])==0) {
				af_on = FALSE;
			} else if (strcmp("-batch", argv[i])==0) {
			} else if (strncmp("-!", argv[i],2)==0) {
			} else {
				print_usage(argv[0]);
			}
		} else {
			print_usage(argv[0]);
		}
	}

	opts = parse_options_create();
	if (opts == NULL) {
		fprintf(stderr, "%s: Fatal error: unable to create parse options\n", argv[0]);
		exit(-1);
	}

	panic_parse_opts = parse_options_create();
	if (panic_parse_opts == NULL) {
		fprintf(stderr, "%s: Fatal error: unable to create panic parse options\n", argv[0]);
		exit(-1);
	}
	setup_panic_parse_options(panic_parse_opts);
	parse_options_set_max_sentence_length(opts, 170);
	parse_options_set_panic_mode(opts, TRUE);
	parse_options_set_max_parse_time(opts, 30);
	parse_options_set_linkage_limit(opts, 1000);
	parse_options_set_short_length(opts, 10);
       /*##########################################*/
//        parse_options_set_display_on(opts, TRUE);
       /*##########################################*/

	if(language && *language)
		dict = dictionary_create_lang(language);
	else
		dict = dictionary_create_default_lang();

	if (dict == NULL) {
               /*###########################################################################*/
		fprintf(stderr, "%s: Fatal error: Unable to open  dictionary.\n", argv[1]);
                /*##########################################################################*/
		exit(-1);
	}

	/* process the command line like commands */
	for (i=1; i<argc; i++) {
		if ((strcmp("-pp", argv[i])==0) ||
			(strcmp("-c", argv[i])==0) ||
			(strcmp("-a", argv[i])==0))
		{
			i++;
		}
		else if ((argv[i][0] == '-') && (strcmp("-ppoff", argv[i])!=0) &&
		         (argv[i][0] == '-') && (strcmp("-coff", argv[i])!=0) &&
		         (argv[i][0] == '-') && (strcmp("-aoff", argv[i])!=0))
		{
			if (argv[i][1] == '!')
				issue_special_command(argv[i]+2, opts, dict);
			else
				issue_special_command(argv[i]+1, opts, dict);
		}
	}

	verbosity = parse_options_get_verbosity(opts);

	/* Main input loop */
	while (1)
	{
		input_string = fget_input_string(input_fh, stdout, opts);

		if (NULL == input_string)
		{
			if (input_fh == stdin) break;
			fclose (input_fh);
			input_fh = stdin;
			continue;
		}

		if ((strcmp(input_string, "quit\n")==0) ||
			(strcmp(input_string, "exit\n")==0)) break;

		/* We have to handle the !file command inline; its too hairy
		 * otherwise ... */
		if (strncmp(input_string, "!file", 5) == 0)
		{
			char * filename = &input_string[6];
			input_fh = fopen(filename, "r");
			if (NULL == input_fh)
			{
				int perr = errno;
				fprintf(stderr, "Error: %s (%d) %s\n",
				        filename, perr, strerror(perr));
				input_fh = stdin;
				continue;
			}
			continue;
		}

		if (special_command(input_string, dict)) continue;
		if (parse_options_get_echo_on(opts)) {
			printf("%s", input_string);
		}

		if (parse_options_get_batch_mode(opts)) {
			label = strip_off_label(input_string);
		}

		sent = sentence_create(input_string, dict);

		if (sent == NULL) continue;

		if (sentence_length(sent) > parse_options_get_max_sentence_length(opts)) {
			if (verbosity > 0) {
				fprintf(stdout,
				       "Sentence length (%d words) exceeds maximum allowable (%d words)\n",
					sentence_length(sent), parse_options_get_max_sentence_length(opts));
			}
			sentence_delete(sent);
			continue;
		}

		/* First parse with cost 0 or 1 and no null links */
		parse_options_set_disjunct_cost(opts, 2);
		parse_options_set_min_null_count(opts, 0);
		parse_options_set_max_null_count(opts, 0);
		parse_options_reset_resources(opts);

		num_linkages = sentence_parse(sent, opts);

              //############################################################################################
               if(num+1>num_linkages && num_linkages != 0)
               {
                 sprintf(link_info_filename,"%s/%s_tmp/linkid_cat.txt",argv[2],argv[3]);
                 fp2 = fopen(link_info_filename,"a");
                 if(fp2==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp2,";~~~~~~~~~~\n");
                 fclose(fp2);
                 sprintf(link_info_filename,"%s/%s_tmp/linkid_word.txt",argv[2],argv[3]);
                 fp_word= fopen(link_info_filename, "a");
        	 if(fp_word==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp_word,";~~~~~~~~~~\n");
                 fclose(fp_word);                 

	         sprintf(link_info_filename,"%s/%s_tmp/link_numeric_word.txt",argv[2],argv[3]);
        	 fp_word_info= fopen(link_info_filename, "a");
	         if(fp_word_info==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp_word_info,";~~~~~~~~~~\n");
                 fclose(fp_word_info);

	         sprintf(link_info_filename,"%s/%s_tmp/link_name_expand.txt",argv[2],argv[3]);
        	 fp_lname =fopen(link_info_filename,"a");
	         if(fp_lname==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp_lname,";~~~~~~~~~~\n");
                 fclose(fp_lname);

        	 sprintf(link_info_filename,"%s/%s_tmp/link_relation_info.txt",argv[2],argv[3]);
	         fp_rel = fopen(link_info_filename,"a");
        	 if(fp_rel==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp_rel,";~~~~~~~~~~\n");
                 fclose(fp_rel);

                 
                /* sprintf(link_info_filename,"%s/%s_tmp/constituents.txt",argv[2],argv[3]);
                 fp = fopen(link_info_filename,"a");
                 if(fp==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp,"\n");
                 fprintf(fp,";~~~~~~~~~~\n");
                 fclose(fp);*/
                }
                 sprintf(link_info_filename,"%s/%s_tmp/linkage_count.txt",argv[2],argv[3]);
                 fp_lcount = fopen(link_info_filename,"a");
                 if(fp_lcount==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}
                 fprintf(fp_lcount, "(Found maximum of %d linkages )\n",num_linkages);
                 fprintf(fp_lcount,";~~~~~~~~~~\n");
                 fclose(fp_lcount);
                //############################################################################################
        
		if (num_linkages < 0) continue;
		/* Now parse with null links */
		if ((num_linkages == 0) && (!parse_options_get_batch_mode(opts))) {
			if (verbosity > 0) //fprintf(stdout, "No complete linkages found.\n");
                         
        //############################################################################################
                     /*  This part of the code written by Maha Laxmi and Shirisha Manju
                     *   if no complete linkage is found then redirect the output to standard output in clips format*/
         sprintf(link_info_filename,"%s/%s_tmp/number.txt",argv[2],argv[3]);
         fp_num =fopen(link_info_filename,"a");
         if(fp_num==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

/*         sprintf(link_info_filename,"%s/%s_tmp/constituents.txt",argv[2],argv[3]);
         fp_cons= fopen(link_info_filename,"a");
         if(fp_cons==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}*/

         sprintf(link_info_filename,"%s/%s_tmp/linkid_word.txt",argv[2],argv[3]);
         fp_word= fopen(link_info_filename, "a");
         if(fp_word==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

         sprintf(link_info_filename,"%s/%s_tmp/link_numeric_word.txt",argv[2],argv[3]);
         fp_word_info= fopen(link_info_filename, "a");
         if(fp_word_info==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

         sprintf(link_info_filename,"%s/%s_tmp/linkid_cat.txt",argv[2],argv[3]);
         fp_word_cat= fopen(link_info_filename, "a");
         if(fp_word_cat==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

         sprintf(link_info_filename,"%s/%s_tmp/link_name_expand.txt",argv[2],argv[3]);
         fp_lname =fopen(link_info_filename,"a");
         if(fp_lname==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

         sprintf(link_info_filename,"%s/%s_tmp/link_relation_info.txt",argv[2],argv[3]);
         fp_rel = fopen(link_info_filename,"a");
         if(fp_rel==NULL) {printf("Could not open %s for writing\n",link_info_filename);exit(1);}

         fprintf(fp_word, "\n(No complete linkages found)\n");
         fprintf(fp_word_cat, "\n(No complete linkages found)\n");
         fprintf(fp_word_info, "\n(No complete linkages found)\n");
         fprintf(fp_lname, "\n(No complete linkages found)\n");
         fprintf(fp_rel,"\n(No complete linkages found)\n");
        
         fprintf(fp_word_cat,";~~~~~~~~~~\n");  //  fprintf(fp_cons,";~~~~~~~~~~\n");
         fprintf(fp_lname,";~~~~~~~~~~\n");       fprintf(fp_rel,";~~~~~~~~~~\n");
         fprintf(fp_word_info,";~~~~~~~~~~\n");   fprintf(fp_word,";~~~~~~~~~~\n");

        /* fclose(fp_cons);  */      fclose(fp_word_cat);  fclose(fp_word_info);
         fclose(fp_lname);       fclose(fp_rel);       fclose(fp_word);

           continue;
  /*###############################################################################################################*/               

			if (parse_options_get_allow_null(opts)) {
				parse_options_set_min_null_count(opts, 1);
				parse_options_set_max_null_count(opts, sentence_length(sent));
				num_linkages = sentence_parse(sent, opts);
			}
		}

		if (parse_options_timer_expired(opts)) {
			if (verbosity > 0) fprintf(stdout, "Timer is expired!\n");
		}
		if (parse_options_memory_exhausted(opts)) {
			if (verbosity > 0) fprintf(stdout, "Memory is exhausted!\n");
		}

		if ((num_linkages == 0) &&
			parse_options_resources_exhausted(opts) &&
			parse_options_get_panic_mode(opts)) {
			/* print_total_time(opts); */
			if (verbosity > 0) fprintf(stdout, "Entering \"panic\" mode...\n");
			parse_options_reset_resources(panic_parse_opts);
			parse_options_set_verbosity(panic_parse_opts, verbosity);
			num_linkages = sentence_parse(sent, panic_parse_opts);
			if (parse_options_timer_expired(panic_parse_opts)) {
				if (verbosity > 0) fprintf(stdout, "Timer is expired!\n");
			}
		}

		/* print_total_time(opts); */

		if (parse_options_get_batch_mode(opts)) {
                        //#######################################################################
                            batch_process_some_linkages(label, sent, opts,argv[2],argv[3]);
                        //#########################################################################
   //			batch_process_some_linkages(label, sent, opts);
		}
               /*###############################################################################*/
               //   send num as an argument to process_some_linkages
                else {
                        int c = process_some_linkages(sent, opts,num,argv[2],argv[3]);
                        if (c == EOF) break;
                      }
              /*################################################################################*/

/*		else {
			int c = process_some_linkages(sent, opts);
			if (c == EOF) break;
		}*/

		sentence_delete(sent);
	}

	if (parse_options_get_batch_mode(opts)) {
		/* print_time(opts, "Total"); */
/*		fprintf(stderr,
				"%d error%s.\n", batch_errors, (batch_errors==1) ? "" : "s");*/
	}

	parse_options_delete(panic_parse_opts);
	parse_options_delete(opts);
	dictionary_delete(dict);

//	printf ("Bye.\n");
	return 0;
}
Esempio n. 5
0
int main(int argc, char * argv[]) {

    Dictionary      dict;
    Sentence        sent;
    char            *dictionary_file=NULL;
    char            *post_process_knowledge_file=NULL;
    char            *constituent_knowledge_file=NULL;
    char            *affix_file=NULL;
    int             pp_on=TRUE;
    int             af_on=TRUE;
    int             cons_on=TRUE;
    int             num_linkages, i;
    char            input_string[MAXINPUT];
    Label           label = NO_LABEL;  
    int             parsing_space_leaked, reported_leak, dictionary_and_option_space;


    i = 1;
    if ((argc > 1) && (argv[1][0] != '-')) {
	/* the dictionary is the first argument if it doesn't begin with "-" */
	dictionary_file = argv[1];	
	i++;
    }

    for (; i<argc; i++) {
	if (argv[i][0] == '-') {
	    if (strcmp("-pp", argv[i])==0) {
		if ((post_process_knowledge_file != NULL) || (i+1 == argc)) 
		  print_usage(argv[0]);
		post_process_knowledge_file = argv[i+1];
		i++;
	    } else 
	    if (strcmp("-c", argv[i])==0) {
		if ((constituent_knowledge_file != NULL) || (i+1 == argc)) 
		  print_usage(argv[0]);
		constituent_knowledge_file = argv[i+1];
		i++;
	    } else 
	    if (strcmp("-a", argv[i])==0) {
		if ((affix_file != NULL) || (i+1 == argc)) print_usage(argv[0]);
		affix_file = argv[i+1];
		i++;
	    } else if (strcmp("-ppoff", argv[i])==0) {
		pp_on = FALSE;
	    } else if (strcmp("-coff", argv[i])==0) {
		cons_on = FALSE;
	    } else if (strcmp("-aoff", argv[i])==0) {
		af_on = FALSE;
	    } else if (strcmp("-batch", argv[i])==0) {
	    } else if (strncmp("-!", argv[i],2)==0) {
	    } else {
		print_usage(argv[0]);		
	    }
	} else {
	    print_usage(argv[0]);
	}
    }

    if (!pp_on && post_process_knowledge_file != NULL) print_usage(argv[0]);

    if (dictionary_file == NULL) {
	dictionary_file = "4.0.dict";
        fprintf(stderr, "No dictionary file specified.  Using %s.\n", 
		dictionary_file);
    }

    if (af_on && affix_file == NULL) {
	affix_file = "4.0.affix";
        fprintf(stderr, "No affix file specified.  Using %s.\n", affix_file);
    }

    if (pp_on && post_process_knowledge_file == NULL) {
	post_process_knowledge_file = "4.0.knowledge";
        fprintf(stderr, "No post process knowledge file specified.  Using %s.\n",
		post_process_knowledge_file);
    }

    if (cons_on && constituent_knowledge_file == NULL) {
        constituent_knowledge_file = "4.0.constituent-knowledge"; 
	fprintf(stderr, "No constituent knowledge file specified.  Using %s.\n", 
		constituent_knowledge_file);
    }

    opts = parse_options_create();
    if (opts == NULL) {
	fprintf(stderr, "%s\n", lperrmsg);
	exit(-1);
    }

    panic_parse_opts = parse_options_create();
    if (panic_parse_opts == NULL) {
	fprintf(stderr, "%s\n", lperrmsg);
	exit(-1);
    }
    setup_panic_parse_options(panic_parse_opts);
    parse_options_set_max_sentence_length(opts, 70);
    parse_options_set_panic_mode(opts, TRUE);
    parse_options_set_max_parse_time(opts, 30);
    parse_options_set_linkage_limit(opts, 1000);
    parse_options_set_short_length(opts, 10);

    dict = dictionary_create(dictionary_file, 
			     post_process_knowledge_file,
			     constituent_knowledge_file,
			     affix_file);
    if (dict == NULL) {
	fprintf(stderr, "%s\n", lperrmsg);
	exit(-1);
    }

    /* process the command line like commands */
    for (i=1; i<argc; i++) {
	if ((strcmp("-pp", argv[i])==0) || 
	    (strcmp("-c", argv[i])==0) || 
	    (strcmp("-a", argv[i])==0)) {
	  i++;
	} else if ((argv[i][0] == '-') && (strcmp("-ppoff", argv[i])!=0) &&
		   (argv[i][0] == '-') && (strcmp("-coff", argv[i])!=0) &&
		   (argv[i][0] == '-') && (strcmp("-aoff", argv[i])!=0)) {
	  issue_special_command(argv[i]+1, opts, dict);
	}
    }

    dictionary_and_option_space = space_in_use;  
    reported_leak = external_space_in_use = 0;
    verbosity = parse_options_get_verbosity(opts);

    while (fget_input_string(input_string, stdin, stdout, opts)) {

	if (space_in_use != dictionary_and_option_space + reported_leak) {
	    fprintf(stderr, "Warning: %d bytes of space leaked.\n",
		    space_in_use-dictionary_and_option_space-reported_leak);
	    reported_leak = space_in_use - dictionary_and_option_space;
	}

	if ((strcmp(input_string, "quit\n")==0) ||
	    (strcmp(input_string, "exit\n")==0)) break;

	if (special_command(input_string, dict)) continue;
	if (parse_options_get_echo_on(opts)) {
	    printf("%s", input_string);
	}

	if (parse_options_get_batch_mode(opts)) {
	    label = strip_off_label(input_string);
	}

	sent = sentence_create(input_string, dict);

	if (sent == NULL) {
	    if (verbosity > 0) fprintf(stderr, "%s\n", lperrmsg);
	    if (lperrno != NOTINDICT) exit(-1);
	    else continue;
	} 
	if (sentence_length(sent) > parse_options_get_max_sentence_length(opts)) {
	    sentence_delete(sent);
	    if (verbosity > 0) {
	      fprintf(stdout, 
		      "Sentence length (%d words) exceeds maximum allowable (%d words)\n",
		    sentence_length(sent), parse_options_get_max_sentence_length(opts));
	    }
	    continue;
	}

	/* First parse with cost 0 or 1 and no null links */
	parse_options_set_disjunct_cost(opts, 2);
	parse_options_set_min_null_count(opts, 0);
	parse_options_set_max_null_count(opts, 0);
	parse_options_reset_resources(opts);

	num_linkages = sentence_parse(sent, opts);

	/* Now parse with null links */
	if ((num_linkages == 0) && (!parse_options_get_batch_mode(opts))) {
	    if (verbosity > 0) fprintf(stdout, "No complete linkages found.\n");
	    if (parse_options_get_allow_null(opts)) {
		parse_options_set_min_null_count(opts, 1);
		parse_options_set_max_null_count(opts, sentence_length(sent));
		num_linkages = sentence_parse(sent, opts);
	    }
	}

	if (parse_options_timer_expired(opts)) {
	    if (verbosity > 0) fprintf(stdout, "Timer is expired!\n");
	}
	if (parse_options_memory_exhausted(opts)) {
	    if (verbosity > 0) fprintf(stdout, "Memory is exhausted!\n");
	}

	if ((num_linkages == 0) && 
	    parse_options_resources_exhausted(opts) &&
	    parse_options_get_panic_mode(opts)) {
	    print_total_time(opts);
	    if (verbosity > 0) fprintf(stdout, "Entering \"panic\" mode...\n");
	    parse_options_reset_resources(panic_parse_opts);
	    parse_options_set_verbosity(panic_parse_opts, verbosity);
	    num_linkages = sentence_parse(sent, panic_parse_opts);
	    if (parse_options_timer_expired(panic_parse_opts)) {
		if (verbosity > 0) fprintf(stdout, "Timer is expired!\n");
	    }
	}

	print_total_time(opts);

	if (parse_options_get_batch_mode(opts)) {
	    batch_process_some_linkages(label, sent, opts);
	}
	else {
	    process_some_linkages(sent, opts);
	}

	sentence_delete(sent);
	if (external_space_in_use != 0) {
	    fprintf(stderr, "Warning: %d bytes of external space leaked.\n", 
		    external_space_in_use);
	}
    }

    if (parse_options_get_batch_mode(opts)) {
	print_time(opts, "Total");
	fprintf(stderr, 
		"%d error%s.\n", batch_errors, (batch_errors==1) ? "" : "s");
    }

    parsing_space_leaked = space_in_use - dictionary_and_option_space;
    if (parsing_space_leaked != 0) {
        fprintf(stderr, "Warning: %d bytes of space leaked during parsing.\n", 
		parsing_space_leaked);
    }

    parse_options_delete(panic_parse_opts);
    parse_options_delete(opts);
    dictionary_delete(dict);

    if (space_in_use != parsing_space_leaked) {
        fprintf(stderr, 
		"Warning: %d bytes of dictionary and option space leaked.\n", 
		space_in_use - parsing_space_leaked);
    } 
    else if (parsing_space_leaked == 0) {
        fprintf(stderr, "Good news: no space leaked.\n");
    }

    if (external_space_in_use != 0) {
        fprintf(stderr, "Warning: %d bytes of external space leaked.\n", 
		external_space_in_use);
    }

    return 0;
}
Esempio n. 6
0
int main(int argc, char * argv[])
{
	FILE            *input_fh = stdin;
	Dictionary      dict;
	const char     *language = NULL;
	int             num_linkages;
	Label           label = NO_LABEL;
	Command_Options *copts;
	Parse_Options   opts;
	bool batch_in_progress = false;

	isatty_stdin = isatty(fileno(stdin));
	isatty_stdout = isatty(fileno(stdout));

#ifdef _WIN32
	/* If compiled with MSVC/MinGW, we still support running under Cygwin.
	 * This is done by checking running_under_cygwin to resolve
	 * incompatibilities. */
	const char *ostype = getenv("OSTYPE");
	if ((NULL != ostype) && (0 == strcmp(ostype, "cygwin")))
		running_under_cygwin = true;

	/* argv encoding is in the current locale. */
	argv = argv2utf8(argc);
	if (NULL == argv)
	{
		prt_error("Fatal error: Unable to parse command line\n");
		exit(-1);
	}

#ifdef _MSC_VER
	_set_printf_count_output(1); /* enable %n support for display_1line_help()*/
#endif /* _MSC_VER */

	win32_set_utf8_output();
#endif /* _WIN32 */

#if LATER
	/* Try to catch the SIGWINCH ... except this is not working. */
	struct sigaction winch_act;
	winch_act.sa_handler = winch_handler;
	winch_act.sa_sigaction = NULL;
	sigemptyset (&winch_act.sa_mask);
	winch_act.sa_flags = 0;
	sigaction (SIGWINCH, &winch_act, NULL);
#endif

	copts = command_options_create();
	if (copts == NULL || copts->panic_opts == NULL)
	{
		prt_error("Fatal error: unable to create parse options\n");
		exit(-1);
	}
	opts = copts->popts;

	setup_panic_parse_options(copts->panic_opts);
	copts->panic_mode = true;

	parse_options_set_max_parse_time(opts, 30);
	parse_options_set_linkage_limit(opts, 1000);
	parse_options_set_min_null_count(opts, 0);
	parse_options_set_max_null_count(opts, 0);
	parse_options_set_short_length(opts, 16);
	parse_options_set_islands_ok(opts, false);
	parse_options_set_display_morphology(opts, false);

	save_default_opts(copts); /* Options so far are the defaults */

	if ((argc > 1) && (argv[1][0] != '-')) {
		/* The dictionary is the first argument if it doesn't begin with "-" */
		language = argv[1];
	}

	for (int i = 1; i < argc; i++)
	{
		if (strcmp("--help", argv[i]) == 0)
		{
			print_usage(stdout, argv[0], copts, 0);
		}

		if (strcmp("--version", argv[i]) == 0)
		{
			printf("Version: %s\n", linkgrammar_get_version());
			printf("%s\n", linkgrammar_get_configuration());
			exit(0);
		}
	}

	/* Process command line variable-setting commands (only). */
	for (int i = 1; i < argc; i++)
	{
		if (argv[i][0] == '-')
		{
			const char *var = argv[i] + ((argv[i][1] != '-') ? 1 : 2);
			if ((var[0] != '!') && (0 > issue_special_command(var, copts, NULL)))
				print_usage(stderr, argv[0], copts, -1);
		}
		else if (i != 1)
		{
			prt_error("Fatal error: Unknown argument '%s'.\n", argv[i]);
			print_usage(stderr, argv[0], copts, -1);
		}
	}

	if (language && *language)
	{
		dict = dictionary_create_lang(language);
		if (dict == NULL)
		{
			prt_error("Fatal error: Unable to open dictionary.\n");
			exit(-1);
		}
	}
	else
	{
		dict = dictionary_create_default_lang();
		if (dict == NULL)
		{
			prt_error("Fatal error: Unable to open default dictionary.\n");
			exit(-1);
		}
	}

	/* Process the command line '!' commands */
	for (int i = 1; i < argc; i++)
	{
		if ((argv[i][0] == '-') && (argv[i][1] == '!'))
		{
			if (0 > issue_special_command(argv[i]+1, copts, dict))
				print_usage(stderr, argv[0], copts, -1);
		}
	}

	check_winsize(copts);

	prt_error("Info: Dictionary version %s, locale %s\n",
		linkgrammar_get_dict_version(dict),
		linkgrammar_get_dict_locale(dict));
	prt_error("Info: Library version %s. Enter \"!help\" for help.\n",
		linkgrammar_get_version());

	/* Main input loop */
	while (true)
	{
		char *input_string;
		Sentence sent = NULL;

		/* Make sure stderr is shown even when MSVC binary runs under
		 * Cygwin/MSYS pty (in that case it is fully buffered(!)). */
		fflush(stderr);

		verbosity = parse_options_get_verbosity(opts);
		debug = parse_options_get_debug(opts);
		test = parse_options_get_test(opts);

		input_string = fget_input_string(input_fh, stdout, /*check_return*/false);
		check_winsize(copts);

		if (NULL == input_string)
		{
			if (ferror(input_fh))
				prt_error("Error: Read: %s\n", strerror(errno));

			if (input_fh == stdin) break;
			fclose (input_fh);
			input_fh = stdin;
			continue;
		}

		/* Discard whitespace characters from end of string. */
		for (char *p = &input_string[strlen(input_string)-1];
		     (p > input_string) && strchr(WHITESPACE, *p) ; p--)
		{
			*p = '\0';
		}

		/* If the input string is just whitespace, then ignore it. */
		if (strspn(input_string, WHITESPACE) == strlen(input_string))
			continue;

		char command = special_command(input_string, copts, dict);
		if ('e' == command) break;    /* It was an exit command */
		if ('c' == command) continue; /* It was another command */
		if (-1 == command) continue;  /* It was a bad command */

		/* We have to handle the !file command inline; it's too hairy
		 * otherwise ... */
		if ('f' == command)
		{
			char * filename = &input_string[strcspn(input_string, WHITESPACE)] + 1;
			int fnlen = strlen(filename);

			if (0 == fnlen)
			{
				prt_error("Error: Missing file name argument\n");
				continue;
			}

			if ('\n' == filename[fnlen-1]) filename[fnlen-1] = '\0';

			struct stat statbuf;
			if ((0 == stat(filename, &statbuf)) && statbuf.st_mode & S_IFDIR)
			{
				prt_error("Error: Cannot open %s: %s\n",
				        filename, strerror(EISDIR));
				continue;
			}

			input_fh = fopen(filename, "r");

			if (NULL == input_fh)
			{
				prt_error("Error: Cannot open %s: %s\n", filename, strerror(errno));
				input_fh = stdin;
				continue;
			}
			continue;
		}


		if (!copts->batch_mode) batch_in_progress = false;
		if ('\0' != test[0])
		{
			/* In batch mode warn only once.
			 * In auto-next-linkage mode don't warn at all. */
			if (!batch_in_progress && !auto_next_linkage_test(test))
			{
				fflush(stdout);
				/* Remind the developer this is a test mode. */
				prt_error("Warning: Tests enabled: %s\n", test);
				if (copts->batch_mode) batch_in_progress = true;
			}
		}

		if (copts->echo_on)
		{
			printf("%s\n", input_string);
		}

		if (copts->batch_mode || auto_next_linkage_test(test))
		{
			label = strip_off_label(input_string);
		}

		// Post-processing-based pruning will clip away connectors
		// that we might otherwise want to examine. So disable PP
		// pruning in this situation.
		if (copts->display_bad)
			parse_options_set_perform_pp_prune(opts, false);
		else
			parse_options_set_perform_pp_prune(opts, true);

		sent = sentence_create(input_string, dict);

		if (sentence_split(sent, opts) < 0)
		{
			sentence_delete(sent);
			sent = NULL;
			continue;
		}

		if (0 != copts->display_wordgraph)
		{
			const char *wg_display_flags = ""; /* default flags */
			switch (copts->display_wordgraph)
			{
				case 1:     /* default flags */
					break;
				case 2:     /* subgraphs with a legend */
					wg_display_flags = "sl";
					break;
				case 3:
					{
						/* Use esoteric flags from the test user variable. */
						const char *s = test_enabled(test, "wg");
						if ((NULL != s) && (':' == s[0])) wg_display_flags = s;
					}
					break;
				default:
					prt_error("Warning: wordgraph=%d: Unknown value, using 1\n",
								 copts->display_wordgraph);
					copts->display_wordgraph = 1;
			}
			sentence_display_wordgraph(sent, wg_display_flags);
		}

		/* First parse with the default disjunct_cost as set by the library
		 * (currently 2.7). Usually parse here with no null links.
		 * However, if "-test=one-step-parse" is used and we are said to
		 * parse with null links, allow parsing here with null links too. */
		bool one_step_parse = !copts->batch_mode && copts->allow_null &&
		                    test_enabled(test, "one-step-parse");
		int max_null_count = one_step_parse ? sentence_length(sent) : 0;

		parse_options_set_min_null_count(opts, 0);
		parse_options_set_max_null_count(opts, max_null_count);
		parse_options_reset_resources(opts);

		num_linkages = sentence_parse(sent, opts);

		/* num_linkages is negative only on a hard-error;
		 * typically, due to a zero-length sentence.  */
		if (num_linkages < 0)
		{
			sentence_delete(sent);
			sent = NULL;
			continue;
		}

#if 0
		/* Try again, this time omitting the requirement for
		 * definite articles, etc. This should allow for the parsing
		 * of newspaper headlines and other clipped speech.
		 *
		 * XXX Unfortunately, this also allows for the parsing of
		 * all sorts of ungrammatical sentences which should not
		 * parse, and leads to bad parses of many other unparsable
		 * but otherwise grammatical sentences.  Thus, this trick
		 * pretty much fails; we leave it here to document the
		 * experiment.
		 */
		if (num_linkages == 0)
		{
			parse_options_set_disjunct_cost(opts, 4.5);
			num_linkages = sentence_parse(sent, opts);
			if (num_linkages < 0) continue;
		}
#endif /* 0 */

		/* Try using a larger list of disjuncts */
		/* XXX FIXME: the lg_expand_disjunct_list() routine is not
		 * currently a part of the public API; it should be made so,
		 * or this expansion idea should be abandoned... not sure which.
		 */
		if ((num_linkages == 0) && parse_options_get_use_cluster_disjuncts(opts))
		{
			int expanded;
			if (verbosity > 0) fprintf(stdout, "No standard linkages, expanding disjunct set.\n");
			parse_options_set_disjunct_cost(opts, 3.9);
			expanded = lg_expand_disjunct_list(sent);
			if (expanded)
			{
				num_linkages = sentence_parse(sent, opts);
			}
			if (0 < num_linkages) printf("Got One !!!!!!!!!!!!!!!!!\n");
		}

		/* If asked to show bad linkages, then show them. */
		if ((num_linkages == 0) && (!copts->batch_mode))
		{
			if (copts->display_bad)
			{
				num_linkages = sentence_num_linkages_found(sent);
			}
		}

		/* Now parse with null links */
		if (!one_step_parse && num_linkages == 0 && !copts->batch_mode)
		{
			if (verbosity > 0) fprintf(stdout, "No complete linkages found.\n");

			if (copts->allow_null)
			{
				/* XXX should use expanded disjunct list here too */
				parse_options_set_min_null_count(opts, 1);
				parse_options_set_max_null_count(opts, sentence_length(sent));
				num_linkages = sentence_parse(sent, opts);
			}
		}

		if (verbosity > 0)
		{
			if (parse_options_timer_expired(opts))
				fprintf(stdout, "Timer is expired!\n");

			if (parse_options_memory_exhausted(opts))
				fprintf(stdout, "Memory is exhausted!\n");
		}

		if ((num_linkages == 0) &&
			copts->panic_mode &&
			parse_options_resources_exhausted(opts))
		{
			/* print_total_time(opts); */
			batch_errors++;
			if (verbosity > 0) fprintf(stdout, "Entering \"panic\" mode...\n");
			/* If the parser used was the SAT solver, set the panic parser to
			 * it too.
			 * FIXME? Currently, the SAT solver code is not too useful in
			 * panic mode since it doesn't handle parsing with null words, so
			 * using the regular parser in that case could be beneficial.
			 * However, this currently causes a crash due to a memory
			 * management mess. */
			parse_options_set_use_sat_parser(copts->panic_opts,
				parse_options_get_use_sat_parser(opts));
			parse_options_reset_resources(copts->panic_opts);
			parse_options_set_verbosity(copts->panic_opts, verbosity);
			(void)sentence_parse(sent, copts->panic_opts);
			if (verbosity > 0)
			{
				if (parse_options_timer_expired(copts->panic_opts))
					fprintf(stdout, "Panic timer is expired!\n");
			}
		}

		if (verbosity > 1) parse_options_print_total_time(opts);

		const char *rc = "";
		if (copts->batch_mode)
		{
			batch_process_some_linkages(label, sent, copts);
		}
		else
		{
			rc = process_some_linkages(input_fh, sent, copts);
		}

		fflush(stdout);
		sentence_delete(sent);
		sent = NULL;

		if ((NULL == rc) && (input_fh == stdin)) break;
	}

	if (copts->batch_mode)
	{
		/* print_time(opts, "Total"); */
		fprintf(stderr,
				"%d error%s.\n", batch_errors, (batch_errors==1) ? "" : "s");
	}

	/* Free stuff, so that mem-leak detectors don't complain. */
	command_options_delete(copts);
	dictionary_delete(dict);

	printf ("Bye.\n");
	return 0;
}
Esempio n. 7
0
static const char *process_some_linkages(FILE *in, Sentence sent,
                                         Command_Options* copts)
{
	int i, num_to_query, num_to_display, num_displayed;
	Linkage linkage;
	double corpus_cost;
	Parse_Options opts = copts->popts;
	int display_max = DISPLAY_MAX;
	bool auto_next_linkage = false;

	i = auto_next_linkage_test(test);
	if (i != 0)
	{
		display_max = i;
		auto_next_linkage = true;
	}

	if (verbosity > 0) print_parse_statistics(sent, opts, copts);
	num_to_query = sentence_num_linkages_post_processed(sent);
	if (!copts->display_bad)
	{
		num_to_display = MIN(sentence_num_valid_linkages(sent),
		                     display_max);
	}
	else
	{
		num_to_display = MIN(num_to_query, display_max);
	}

	for (i=0, num_displayed=0; i<num_to_query; i++)
	{
		if ((sentence_num_violations(sent, i) > 0) &&
			!copts->display_bad)
		{
			continue;
		}

		linkage = linkage_create(i, sent, opts);

		/* Currently, sat solver sets the linkage violation indication
		 * only when it creates the linkage as a result of the above call. */
		if ((sentence_num_violations(sent, i) > 0) &&
			!copts->display_bad)
		{
			continue;
		}

		/* Currently, sat solver returns NULL when there ain't no more */
		if (!linkage)
		{
			if (verbosity > 0)
			{
				if (0 == i)
					fprintf(stdout, "No linkages found.\n");
				else
					fprintf(stdout, "No more linkages.\n");
			}
			break;
		}

		if (verbosity > 0)
		{
			if ((sentence_num_valid_linkages(sent) == 1) &&
				!copts->display_bad)
			{
				fprintf(stdout, "\tUnique linkage, ");
			}
			else if (copts->display_bad &&
			         (sentence_num_violations(sent, i) > 0))
			{
				fprintf(stdout, "\tLinkage %d (bad), ", num_displayed+1);
			}
			else
			{
				fprintf(stdout, "\tLinkage %d, ", num_displayed+1);
			}

			corpus_cost = linkage_corpus_cost(linkage);
			if (corpus_cost < 0.0f)
			{
				fprintf(stdout, "cost vector = (UNUSED=%d DIS=%5.2f LEN=%d)\n",
				       linkage_unused_word_cost(linkage),
				       linkage_disjunct_cost(linkage),
				       linkage_link_cost(linkage));
			}
			else
			{
				fprintf(stdout, "cost vector = (CORP=%6.4f UNUSED=%d DIS=%5.2f LEN=%d)\n",
				       corpus_cost,
				       linkage_unused_word_cost(linkage),
				       linkage_disjunct_cost(linkage),
				       linkage_link_cost(linkage));
			}
		}

		process_linkage(linkage, copts);
		linkage_delete(linkage);

		if (++num_displayed < num_to_display)
		{
			if (!auto_next_linkage)
			{
				if ((verbosity > 0) && (!copts->batch_mode) && isatty_stdin && isatty_stdout)
				{
					fprintf(stdout, "Press RETURN for the next linkage.\n");
				}
				char *rc = fget_input_string(stdin, stdout, /*check_return*/true);
				if ((NULL == rc) || (*rc != '\n')) return rc;
			}
		}
		else
		{
			break;
		}
	}
	return "x";
}