Added simple WCSA

[SXSI/TextCollection.git] / swcsa / buildStats.c

diff --git a/swcsa/buildStats.c b/swcsa/buildStats.c
new file mode 100644 (file)
index 0000000..4339bbd
--- /dev/null
+++ b/swcsa/buildStats.c
@@ -0,0 +1,106 @@
+/*
+ * Run Queries
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include "buildFacade.h"
+
+/* only for getTime() */
+#include <sys/time.h>
+#include <sys/resource.h>
+
+/* macro to detect and to notify errors */
+#define IFERROR(error) {{if (error) { fprintf(stderr, "%s\n", error_index(error)); exit(1); }}}
+
+
+/* local headers */
+
+double getTime (void);
+void usage(char * progname);
+               
+static void *Index;     /* opauque data type */
+static ulong Index_size, Text_length;
+static double Load_time;
+
+
+
+/*
+ * Temporary usage: run_queries <index file> <type> [length] [V]
+ */
+int main (int argc, char *argv[])
+{
+       int error = 0;
+       char *filename;
+       char querytype;
+       
+       if (argc != 2)  {
+               usage(argv[0]); 
+               exit (1);
+       }
+       
+       filename = argv[1];
+
+       printf("\n Stats of index: %s\n",argv[1]);
+       
+       Load_time = getTime ();
+       error = load_index (filename, &Index);
+       IFERROR (error);
+       Load_time = getTime () - Load_time;
+       fprintf (stderr, "\tLoad index time = %.2f secs\n", Load_time);
+
+       error = index_size(Index, &Index_size);
+       IFERROR (error);
+
+       error = get_length(Index, &Text_length);
+       IFERROR (error);
+       
+       
+       ulong text_len;
+       error = get_length(Index, &text_len);
+       IFERROR (error);
+       
+       error = printInfo(Index);
+       IFERROR(error);         
+       
+       error = free_index(Index);
+       IFERROR(error);
+       
+
+
+       fprintf(stdout,"\t===============================================\n");
+       fprintf(stdout,"\tInput: %lu bytes (text) --> Output %lu bytes (wcsa).\n", text_len, Index_size);
+       fprintf(stderr,"\tIndex size = %lu Kb\n", Index_size/1024);
+       fprintf(stdout,"\tOverall compression --> %.2f%% (%.2f bits per char).\n",
+                       (100.0*Index_size)/text_len, (Index_size*8.0)/text_len);
+       fprintf(stdout,"\t===============================================\n");
+
+
+       return 0;
+}
+
+double
+getTime (void)
+{
+       double usertime, systime;
+       struct rusage usage;
+
+       getrusage (RUSAGE_SELF, &usage);
+
+       usertime = (double) usage.ru_utime.tv_sec +
+               (double) usage.ru_utime.tv_usec / 1000000.0;
+
+       systime = (double) usage.ru_stime.tv_sec +
+               (double) usage.ru_stime.tv_usec / 1000000.0;
+
+       //return (usertime + systime);
+       return (usertime );
+}
+
+
+void usage(char * progname) {  
+       fprintf(stderr, "\nThe program loads <index> and shows some stats on it\n");
+       fprintf(stderr, "Usage:  %s <index> \n", progname);
+}