1 files changed, 74 insertions, 0 deletions
diff --git a/tesseract/src/ccstruct/blread.cpp b/tesseract/src/ccstruct/blread.cpp
new file mode 100644
index 00000000..8854d915
--- /dev/null
+++ b/tesseract/src/ccstruct/blread.cpp
@@ -0,0 +1,74 @@
+/**********************************************************************
+ * File:        blread.cpp  (Formerly pdread.c)
+ * Description: Friend function of BLOCK to read the uscan pd file.
+ * Author:      Ray Smith
+ *
+ * (C) Copyright 1991, 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 "blread.h"
+
+#include "ocrblock.h"   // for BLOCK_IT, BLOCK, BLOCK_LIST (ptr only)
+#include "scanutils.h"  // for tfscanf
+
+#include <cstdio>       // for fclose, fopen, FILE
+
+namespace tesseract {
+
+#define UNLV_EXT  ".uzn"  // unlv zone file
+
+/**********************************************************************
+ * read_unlv_file
+ *
+ * Read a whole unlv zone file to make a list of blocks.
+ **********************************************************************/
+
+bool read_unlv_file(                    //print list of sides
+                     std::string& name, //basename of file
+                     int32_t xsize,     //image size
+                     int32_t ysize,     //image size
+                     BLOCK_LIST* blocks //output list
+                    ) {
+  FILE *pdfp;                    //file pointer
+  BLOCK *block;                  //current block
+  int x;                         //current top-down coords
+  int y;
+  int width;                     //of current block
+  int height;
+  BLOCK_IT block_it = blocks;    //block iterator
+
+  name += UNLV_EXT;              //add extension
+  if ((pdfp = fopen (name.c_str (), "rb")) == nullptr) {
+    return false;                //didn't read one
+  } else {
+    while (tfscanf(pdfp, "%d %d %d %d %*s", &x, &y, &width, &height) >= 4) {
+                                 //make rect block
+      block = new BLOCK (name.c_str (), true, 0, 0,
+                         static_cast<int16_t>(x), static_cast<int16_t>(ysize - y - height),
+                         static_cast<int16_t>(x + width), static_cast<int16_t>(ysize - y));
+                                 //on end of list
+      block_it.add_to_end (block);
+    }
+    fclose(pdfp);
+  }
+  tprintf("UZN file %s loaded.\n", name.c_str());
+  return true;
+}
+
+void FullPageBlock(int width, int height, BLOCK_LIST *blocks) {
+  BLOCK_IT block_it(blocks);
+  auto* block = new BLOCK("", true, 0, 0, 0, 0, width, height);
+  block_it.add_to_end(block);
+}
+
+} // namespace tesseract