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4c3475ad2e
git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@890 d0cd1f9f-072b-0410-8dd7-cf729c803f20
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
/**********************************************************************
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* File: serialis.h (Formerly serialmac.h)
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* Description: Inline routines and macros for serialisation functions
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* Author: Phil Cheatle
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* Created: Tue Oct 08 08:33:12 BST 1991
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*
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* (C) Copyright 1990, Hewlett-Packard Ltd.
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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 "serialis.h"
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#include <stdio.h>
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namespace tesseract {
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TFile::TFile() : offset_(0) {
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}
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bool TFile::Open(const STRING& filename, FileReader reader) {
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offset_ = 0;
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if (reader == NULL)
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return LoadDataFromFile(filename, &data_);
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else
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return (*reader)(filename, &data_);
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}
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bool TFile::Open(const char* data, int size) {
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offset_ = 0;
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data_.init_to_size(size, 0);
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memcpy(&data_[0], data, size);
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return true;
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}
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bool TFile::Open(FILE* fp, inT64 end_offset) {
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offset_ = 0;
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inT64 current_pos = ftell(fp);
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if (end_offset < 0) {
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fseek(fp, 0, SEEK_END);
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end_offset = ftell(fp);
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fseek(fp, current_pos, SEEK_SET);
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}
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int size = end_offset - current_pos;
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data_.init_to_size(size, 0);
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return fread(&data_[0], 1, size, fp) == size;
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}
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char* TFile::FGets(char* buffer, int buffer_size) {
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int size = 0;
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while (size + 1 < buffer_size && offset_ < data_.size()) {
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buffer[size++] = data_[offset_++];
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if (data_[offset_ - 1] == '\n') break;
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}
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if (size < buffer_size) buffer[size] = '\0';
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return size > 0 ? buffer : NULL;
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}
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int TFile::FRead(void* buffer, int size, int count) {
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char* char_buffer = reinterpret_cast<char*>(buffer);
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int required_size = size * count;
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if (data_.size() - offset_ < required_size)
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required_size = data_.size() - offset_;
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memcpy(char_buffer, &data_[offset_], required_size);
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offset_ += required_size;
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return required_size / size;
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}
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} // namespace tesseract.
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