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https://github.com/tesseract-ocr/tesseract.git
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f382fb56f5
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@106 d0cd1f9f-072b-0410-8dd7-cf729c803f20
81 lines
2.7 KiB
C++
81 lines
2.7 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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#include "mfcpch.h"
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#include <string.h>
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#include "boxread.h"
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#include "unichar.h"
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#include "tprintf.h"
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bool read_next_box(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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static int line = 0;
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int count = 0;
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char buff[kBufSize]; //boxfile read buffer
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char uch[kBufSize];
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char *buffptr = buff;
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while (!feof(box_file)) {
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fgets(buff, sizeof(buff) - 1, box_file);
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line++;
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buffptr = buff;
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const unsigned char *ubuf = reinterpret_cast<const unsigned char*>(buffptr);
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if (ubuf[0] == 0xef && ubuf[1] == 0xbb && ubuf[2] == 0xbf)
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buffptr += 3; // Skip unicode file designation.
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/* Check for blank lines in box file */
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while (*buffptr == ' ' || *buffptr == '\t')
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buffptr++;
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if (*buffptr != '\0') {
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count = sscanf(buffptr, "%s " INT32FORMAT " " INT32FORMAT " "
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INT32FORMAT " " INT32FORMAT,
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uch, x_min, y_min, x_max, y_max);
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if (count == 5) {
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// Validate UTF8 by making unichars with it.
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int used = 0;
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int uch_len = strlen(uch);
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while (used < uch_len) {
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UNICHAR ch(uch + used, uch_len - used);
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int new_used = ch.utf8_len();
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if (new_used == 0) {
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tprintf("Bad utf-8 char starting with 0x%x at line %d, col %d, \n",
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uch[used], used + 1, line);
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count = 0;
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break;
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}
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used += new_used;
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}
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if (uch_len > UNICHAR_LEN) {
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tprintf("utf-8 string too long at line %d\n", line);
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count = 0;
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}
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}
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if (count != 5) {
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tprintf("Box file format error on line %i ignored\n", line);
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} else {
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strcpy(utf8_str, uch);
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return true; //read a box ok
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}
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}
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}
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fclose(box_file);
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line = 0;
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return false; //EOF
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}
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