cline: src/bfile_heuristics.c@9c8d768f0244 (annotated)

src/bfile_heuristics.c@9c8d768f0244 (annotated)

src/bfile_heuristics.c

Mon, 27 Jul 2020 17:19:56 +0200

author: Mike Becker <universe@uap-core.de>
date: Mon, 27 Jul 2020 17:19:56 +0200
changeset 61: 9c8d768f0244
parent 57: 68018eac46c3
permissions: -rw-r--r--

adds option to compute individual sums

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2018 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  * notice, this list of conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #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;
 }

Mercurial > hg > cline / annotate

src/bfile_heuristics.c@9c8d768f0244 (annotated)

src/bfile_heuristics.c