/* -*- Mode: C++; c-basic-offset:4; tab-width:4; indent-tabs-mode:nil -*- */
/*
* libopenraw - rawcontainer.cpp
*
* Copyright (C) 2006-2017 Hubert Figuière
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <memory>
#include <libopenraw/debug.h>
#include "trace.hpp"
#include "endianutils.hpp"
#include "rawcontainer.hpp"
using namespace Debug;
namespace OpenRaw {
namespace Internals {
RawContainer::RawContainer(const IO::Stream::Ptr &_file, off_t _offset)
: m_file(_file),
m_offset(_offset),
m_endian(ENDIAN_NULL)
{
m_file->open();
m_file->seek(_offset, SEEK_SET);
}
RawContainer::~RawContainer()
{
m_file->close();
}
bool RawContainer::skip(off_t offset)
{
m_file->seek(offset, SEEK_CUR);
return true;
}
Option<int8_t>
RawContainer::readInt8(const IO::Stream::Ptr &f)
{
unsigned char buf;
int s = f->read(&buf, 1);
if (s != 1) {
return Option<int8_t>();
}
return Option<int8_t>(buf);
}
Option<uint8_t>
RawContainer::readUInt8(const IO::Stream::Ptr &f)
{
unsigned char buf;
int s = f->read(&buf, 1);
if (s != 1) {
return Option<uint8_t>();
}
return Option<uint8_t>(buf);
}
Option<int16_t>
RawContainer::readInt16(const IO::Stream::Ptr &f)
{
if (m_endian == ENDIAN_NULL) {
LOGERR("null endian\n");
return Option<int16_t>();
}
unsigned char buf[2];
int s = f->read(buf, 2);
if (s != 2) {
return Option<int16_t>();
}
if (m_endian == ENDIAN_LITTLE) {
return Option<int16_t>(EL16(buf));
} else {
return Option<int16_t>(BE16(buf));
}
}
/**
* Return the number of element read.
*/
size_t
RawContainer::readUInt16Array(const IO::Stream::Ptr &f, std::vector<uint16_t> & v, size_t count)
{
if (m_endian == ENDIAN_NULL) {
LOGERR("null endian\n");
return 0;
}
if (v.size() < count) {
v.resize(count, 0);
}
uint8_t buf[2];
size_t num_read = 0;
for (size_t i = 0; i < count; i++) {
int s = f->read(buf, 2);
uint16_t val;
if (s != 2) {
return num_read;
}
if (m_endian == ENDIAN_LITTLE) {
val = EL16(buf);
} else {
val = BE16(buf);
}
v[i] = val;
num_read++;
}
return num_read;
}
Option<int32_t>
RawContainer::readInt32(const IO::Stream::Ptr &f)
{
if (m_endian == ENDIAN_NULL) {
LOGERR("null endian\n");
return Option<int32_t>();
}
unsigned char buf[4];
int s = f->read(buf, 4);
if (s != 4) {
LOGERR("read %d bytes\n", s);
return Option<int32_t>();
}
if (m_endian == ENDIAN_LITTLE) {
return Option<int32_t>(EL32(buf));
} else {
return Option<int32_t>(BE32(buf));
}
}
Option<uint16_t>
RawContainer::readUInt16(const IO::Stream::Ptr &f)
{
if (m_endian == ENDIAN_NULL) {
LOGERR("null endian\n");
return Option<uint16_t>();
}
unsigned char buf[2];
int s = f->read(buf, 2);
if (s != 2) {
return Option<uint16_t>();
}
if (m_endian == ENDIAN_LITTLE) {
return Option<uint16_t>(EL16(buf));
} else {
return Option<uint16_t>(BE16(buf));
}
}
Option<uint32_t>
RawContainer::readUInt32(const IO::Stream::Ptr &f)
{
if (m_endian == ENDIAN_NULL) {
LOGERR("null endian\n");
return Option<uint32_t>();
}
unsigned char buf[4];
int s = f->read(buf, 4);
if (s != 4) {
return Option<uint32_t>();
}
if (m_endian == ENDIAN_LITTLE) {
return Option<uint32_t>(EL32(buf));
} else {
return Option<uint32_t>(BE32(buf));
}
}
size_t
RawContainer::fetchData(void *buf, off_t _offset,
size_t buf_size)
{
size_t s = 0;
m_file->seek(_offset, SEEK_SET);
s = m_file->read(buf, buf_size);
return s;
}
off_t
RawContainer::size() const
{
return m_file->filesize();
}
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0))
tab-width:2
c-basic-offset:2
indent-tabs-mode:nil
fill-column:80
End:
*/