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/*
* Copyright (C) 2012 Alberto Mardegan <info@mardy.it>
*
* This file is part of QtRaw.
*
* QtRaw 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 3 of the License, or
* (at your option) any later version.
*
* QtRaw 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 QtRaw. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Copyright (C) 2020 ~ 2021 Uniontech Software Technology Co., Ltd.
*
* Author: LiuMingHang <liuminghang@uniontech.com>
*
* Maintainer: ZhangYong <ZhangYong@uniontech.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 3 of the License, or
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "datastream.h"
#include <QIODevice>
#include <QTextStream>
Datastream::Datastream(QIODevice *device):
m_device(device)
{
}
Datastream::~Datastream()
{
}
int Datastream::valid()
{
return m_device->isReadable();
}
int Datastream::read(void *ptr, size_t size, size_t nmemb)
{
return int(m_device->read((char *)ptr, qint64(size * nmemb)));
}
int Datastream::seek(INT64 offset, int whence)
{
if (! m_device->isOpen()) return -1;
qint64 pos;
switch (whence) {
case SEEK_SET:
pos = offset;
break;
case SEEK_CUR:
pos = m_device->pos() + offset;
break;
case SEEK_END:
pos = m_device->size();
break;
default:
return -1;
}
if (pos < 0) pos = 0;
if (m_device->bytesAvailable() < pos) return -1;
return m_device->seek(pos) ? 0 : -1;
}
INT64 Datastream::tell()
{
return m_device->pos();
}
INT64 Datastream::size()
{
return m_device->size();
}
int Datastream::get_char()
{
char c;
return m_device->getChar(&c) ? (unsigned char)c : -1;
}
char *Datastream::gets(char *s, int n)
{
return m_device->readLine(s, n) >= 0 ? s : nullptr;
}
int Datastream::scanf_one(const char *fmt, void *val)
{
QTextStream stream(m_device);
/* This is only used for %d or %f */
if (qstrcmp(fmt, "%d") == 0) {
int d;
stream >> d;
*(static_cast<int *>(val)) = d;
} else if (qstrcmp(fmt, "%f") == 0) {
float f;
stream >> f;
*(static_cast<float *>(val)) = f;
} else {
return 0;
}
return (stream.status() == QTextStream::Ok) ? 1 : EOF;
}
int Datastream::eof()
{
return m_device->atEnd();
}
void *Datastream::make_jas_stream()
{
return nullptr;
}
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