cline: bfile_heuristics.c@802c5382f499 (annotated)

bfile_heuristics.c@802c5382f499 (annotated)

Thu, 01 Dec 2011 17:04:30 +0100

Added line buffer (and warning message - there is no regexp parser, though)

 /*
  * 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++;
     }
     if (def->tcount > 1) { /* empty files are text files */
       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;
         }
         break;
       }
     }
   }
   return ret;
 }