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git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@526 d0cd1f9f-072b-0410-8dd7-cf729c803f20
49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/**********************************************************************
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* File: boxread.cpp
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* Description: Read data from a box file.
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* Author: Ray Smith
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* Created: Fri Aug 24 17:47:23 PDT 2007
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*
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* (C) Copyright 2007, Google Inc.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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**********************************************************************/
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#ifndef TESSERACT_CCUTIL_BOXREAD_H__
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#define TESSERACT_CCUTIL_BOXREAD_H__
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#include <stdio.h>
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#include "strngs.h"
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// Size of buffer used to read a line from a box file.
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const int kBoxReadBufSize = 1024;
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// Open the boxfile based on the given image filename.
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FILE* OpenBoxFile(const STRING& fname);
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// read_next_box factors out the code to interpret a line of a box
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// file so that applybox and unicharset_extractor interpret the same way.
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// This function returns the next valid box file utf8 string and coords
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// and returns true, or false on eof (and closes the file).
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// If ignores the uft8 file signature, checks for valid utf-8 and allows
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// space or tab between fields.
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// utf8_str must be at least kBoxReadBufSize in length.
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// If there are page numbers in the file, it reads them all.
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bool read_next_box(int *line_number, FILE* box_file, char* utf8_str,
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int* x_min, int* y_min, int* x_max, int* y_max);
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// As read_next_box above, but get a specific page number. (0-based)
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// Use -1 to read any page number. Files without page number all
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// read as if they are page 0.
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bool read_next_box(int page, int *line_number, FILE* box_file, char* utf8_str,
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int* x_min, int* y_min, int* x_max, int* y_max);
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#endif // TESSERACT_CCUTIL_BOXREAD_H__
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