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/*
* Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <cstring>
#include <cctype>
#include <algorithm>
#include <ZLInputStream.h>
#include <ZLUnicodeUtil.h>
#include "TextFormatDetector.h"
TextFormatDetector::TextFormatDetector() {
}
TextFormatDetector::~TextFormatDetector() {
}
bool TextFormatDetector::isHtml(ZLInputStream &stream) const {
if (!stream.open()) {
return false;
}
const std::size_t bufferSize = 1024;
char *buffer = new char[bufferSize];
std::string sixBytes;
int valuableBytesCounter = 0;
bool skipFlag = true;
while (valuableBytesCounter < 6) {
std::size_t size = stream.read(buffer, bufferSize);
if (size == 0) {
break;
}
std::size_t index;
for (index = 0; skipFlag && (index < size); ++index) {
if (!std::isspace((unsigned char)buffer[index])) {
skipFlag = false;
break;
}
}
if (!skipFlag && index < size) {
int bytes = std::min(6 - valuableBytesCounter, (int)(size - index));
sixBytes = std::string(buffer + index, bytes);
valuableBytesCounter += bytes;
}
}
stream.close();
delete[] buffer;
return ZLUnicodeUtil::toLower(sixBytes) == "<html>";
}
bool TextFormatDetector::isPPL(ZLInputStream &stream) const {
if (!stream.open()) {
return false;
}
char buffer[5];
bool result = stream.read(buffer, 5) == 5 && std::strncmp(buffer, "PPL\r\n", 5) == 0;
stream.close();
return result;
}
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