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diff --git a/tesseract/src/ccmain/tessbox.cpp b/tesseract/src/ccmain/tessbox.cpp
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+++ b/tesseract/src/ccmain/tessbox.cpp
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+/**********************************************************************
+ * File:        tessbox.cpp  (Formerly tessbox.c)
+ * Description: Black boxed Tess for developing a resaljet.
+ * Author:      Ray Smith
+ * Created:     Thu Apr 23 11:03:36 BST 1992
+ *
+ * (C) Copyright 1992, Hewlett-Packard Ltd.
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ *
+ **********************************************************************/
+
+#include "mfoutline.h"
+#include "tesseractclass.h"
+
+/**
+ * @name tess_segment_pass_n
+ *
+ * Segment a word using the pass_n conditions of the tess segmenter.
+ * @param pass_n pass number
+ * @param word word to do
+ */
+
+namespace tesseract {
+void Tesseract::tess_segment_pass_n(int pass_n, WERD_RES *word) {
+  int saved_enable_assoc = 0;
+  int saved_chop_enable = 0;
+
+  if (word->word->flag(W_DONT_CHOP)) {
+    saved_enable_assoc = wordrec_enable_assoc;
+    saved_chop_enable = chop_enable;
+    wordrec_enable_assoc.set_value(0);
+    chop_enable.set_value(0);
+  }
+  if (pass_n == 1)
+    set_pass1();
+  else
+    set_pass2();
+  recog_word(word);
+  if (word->best_choice == nullptr)
+    word->SetupFake(*word->uch_set);
+  if (word->word->flag(W_DONT_CHOP)) {
+    wordrec_enable_assoc.set_value(saved_enable_assoc);
+    chop_enable.set_value(saved_chop_enable);
+  }
+}
+
+/**
+ * @name tess_acceptable_word
+ *
+ * @return true if the word is regarded as "good enough".
+ * @param word_choice after context
+ * @param raw_choice before context
+ */
+bool Tesseract::tess_acceptable_word(WERD_RES* word) {
+  return getDict().AcceptableResult(word);
+}
+
+
+/**
+ * @name tess_add_doc_word
+ *
+ * Add the given word to the document dictionary
+ */
+void Tesseract::tess_add_doc_word(WERD_CHOICE *word_choice) {
+  getDict().add_document_word(*word_choice);
+}
+}  // namespace tesseract