mirror of
https://github.com/tesseract-ocr/tesseract.git
synced 2024-12-19 03:54:10 +08:00
03eec61a2f
It is not necessary to check for null pointers after new. Simplify also two delete operations which were missing in the previous commit. Signed-off-by: Stefan Weil <sw@weilnetz.de>
118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
/**********************************************************************
|
|
* File: word_altlist.cpp
|
|
* Description: Implementation of the Word Alternate List Class
|
|
* Author: Ahmad Abdulkader
|
|
* Created: 2008
|
|
*
|
|
* (C) Copyright 2008, Google Inc.
|
|
** 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 "word_altlist.h"
|
|
|
|
namespace tesseract {
|
|
WordAltList::WordAltList(int max_alt)
|
|
: AltList(max_alt) {
|
|
word_alt_ = NULL;
|
|
}
|
|
|
|
WordAltList::~WordAltList() {
|
|
if (word_alt_ != NULL) {
|
|
for (int alt_idx = 0; alt_idx < alt_cnt_; alt_idx++) {
|
|
if (word_alt_[alt_idx] != NULL) {
|
|
delete []word_alt_[alt_idx];
|
|
}
|
|
}
|
|
delete []word_alt_;
|
|
word_alt_ = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* insert an alternate word with the specified cost and tag
|
|
*/
|
|
bool WordAltList::Insert(char_32 *word_str, int cost, void *tag) {
|
|
if (word_alt_ == NULL || alt_cost_ == NULL) {
|
|
word_alt_ = new char_32*[max_alt_];
|
|
alt_cost_ = new int[max_alt_];
|
|
alt_tag_ = new void *[max_alt_];
|
|
memset(alt_tag_, 0, max_alt_ * sizeof(*alt_tag_));
|
|
} else {
|
|
// check if alt already exists
|
|
for (int alt_idx = 0; alt_idx < alt_cnt_; alt_idx++) {
|
|
if (CubeUtils::StrCmp(word_str, word_alt_[alt_idx]) == 0) {
|
|
// update the cost if we have a lower one
|
|
if (cost < alt_cost_[alt_idx]) {
|
|
alt_cost_[alt_idx] = cost;
|
|
alt_tag_[alt_idx] = tag;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// determine length of alternate
|
|
int len = CubeUtils::StrLen(word_str);
|
|
|
|
word_alt_[alt_cnt_] = new char_32[len + 1];
|
|
|
|
if (len > 0) {
|
|
memcpy(word_alt_[alt_cnt_], word_str, len * sizeof(*word_str));
|
|
}
|
|
|
|
word_alt_[alt_cnt_][len] = 0;
|
|
alt_cost_[alt_cnt_] = cost;
|
|
alt_tag_[alt_cnt_] = tag;
|
|
|
|
alt_cnt_++;
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* sort the alternate in descending order based on the cost
|
|
*/
|
|
void WordAltList::Sort() {
|
|
for (int alt_idx = 0; alt_idx < alt_cnt_; alt_idx++) {
|
|
for (int alt = alt_idx + 1; alt < alt_cnt_; alt++) {
|
|
if (alt_cost_[alt_idx] > alt_cost_[alt]) {
|
|
char_32 *pchTemp = word_alt_[alt_idx];
|
|
word_alt_[alt_idx] = word_alt_[alt];
|
|
word_alt_[alt] = pchTemp;
|
|
|
|
int temp = alt_cost_[alt_idx];
|
|
alt_cost_[alt_idx] = alt_cost_[alt];
|
|
alt_cost_[alt] = temp;
|
|
|
|
void *tag = alt_tag_[alt_idx];
|
|
alt_tag_[alt_idx] = alt_tag_[alt];
|
|
alt_tag_[alt] = tag;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void WordAltList::PrintDebug() {
|
|
for (int alt_idx = 0; alt_idx < alt_cnt_; alt_idx++) {
|
|
char_32 *word_32 = word_alt_[alt_idx];
|
|
string word_str;
|
|
CubeUtils::UTF32ToUTF8(word_32, &word_str);
|
|
int num_unichars = CubeUtils::StrLen(word_32);
|
|
fprintf(stderr, "Alt[%d]=%s (cost=%d, num_unichars=%d); unichars=", alt_idx,
|
|
word_str.c_str(), alt_cost_[alt_idx], num_unichars);
|
|
for (int i = 0; i < num_unichars; ++i)
|
|
fprintf(stderr, "%d ", word_32[i]);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
} // namespace tesseract
|