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/*
------------------------------------------------------------------------------
MetaCam - Extract EXIF information from digital camera files, with
support for Vendor specific blocks.
Copyright (C) 2000 Daniel Stephens (daniel@cheeseplant.org)
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
------------------------------------------------------------------------------
*/
#include <iostream.h>
#include "metacam.h"
static const char *rcsid="$Id: ifd.cc,v 1.2 2000/05/29 22:11:28 daniel Exp $";
IFD::IFD(const IFD &i)
: file(i.file), ofs(i.ofs), entries(i.entries), next_ifd(i.next_ifd)
{
if (entries) {
table = new IFDEntry *[i.entries];
for (int x=0; x<entries; ++x) table[x] = new IFDEntry(*i.table[x]);
} else {
table = 0;
}
}
IFD &
IFD::operator=(const IFD &i)
{
if (this == &i) return *this;
if (&file != &i.file) {
cerr << "Cannot change file!" << endl;
exit(2);
}
if (entries) {
for (int i=0; i<entries; ++i) delete table[i];
delete [] table;
}
ofs = i.ofs;
entries = i.entries;
next_ifd = i.next_ifd;
if (entries) {
table = new IFDEntry *[i.entries];
for (int x=0; x<entries; ++x) table[x] = new IFDEntry(*i.table[x]);
} else {
table = 0;
}
return *this;
}
IFD::~IFD()
{
if (entries) {
for (int i=0; i<entries; ++i) delete table[i];
delete [] table;
}
}
IFD::IFD(tiffFile &t, unsigned long o, unsigned long tagofs)
: file(t), ofs(o), table(0)
{
if (!ofs) {
entries=0;
table=0;
next_ifd=0;
return;
}
file.Seek(ofs);
entries = file.Get_UShort();
table = new IFDEntry *[entries];
int i;
for (i=0; i<entries; ++i) {
IFDEntry e(file);
e.tag = file.Get_UShort() + tagofs;
e.type = file.Get_UShort();
e.values = file.Get_ULong();
if (e.Length() <= 4) {
e.offset = file.Get_Offset();
file.Get_ULong();
} else {
e.offset = file.Get_ULong();
}
table[i] = new IFDEntry(e);
}
next_ifd = file.Get_ULong();
}
const IFDEntry &
IFD::operator[](int n) const
{
if ((n<0) || (n>=entries)) {
cerr << "IFD Array Bounds Violated" << endl;
exit(2);
}
return *table[n];
}
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