cline: bfile_heuristics.c@4508da679ffb (annotated)

bfile_heuristics.c@4508da679ffb (annotated)

Thu, 20 Oct 2011 17:29:23 +0200

completed binary file heuristics

 /*
  * bfile_heuristics.c
  *
  *  Created on: 20.10.2011
  *      Author: Mike
  */
 #include "bfile_heuristics.h"
 #include <ctype.h>
 bfile_heuristics_t *new_bfile_heuristics_t() {
   bfile_heuristics_t *ret = malloc(sizeof(bfile_heuristics_t));
   ret->level = BFILE_MEDIUM_ACCURACY;
   bfile_reset(ret);
   return ret;
 }
 void destroy_bfile_heuristics_t(bfile_heuristics_t *def) {
   free(def);
 }
 void bfile_reset(bfile_heuristics_t *def) {
   def->bcount = 0;
   def->tcount = 0;
 }
 bool bfile_check(bfile_heuristics_t *def, int next_char) {
   bool ret = false;
   if (def->level != BFILE_IGNORE) {
     def->tcount++;
     if (!isprint(next_char) && !isspace(next_char)) {
       def->bcount++;
     }
     switch (def->level) {
     case BFILE_LOW_ACCURACY:
       if (def->tcount > 15 || next_char == EOF) {
         ret = (1.0*def->bcount)/def->tcount > 0.32;
       }
       break;
     case BFILE_HIGH_ACCURACY:
       if (def->tcount > 500 || next_char == EOF) {
         ret = (1.0*def->bcount)/def->tcount > 0.1;
       }
       break;
     default: /* BFILE_MEDIUM_ACCURACY */
       if (def->tcount > 100 || next_char == EOF) {
         ret = (1.0*def->bcount)/def->tcount > 0.1;
       }
     }
   }
   return ret;
 }