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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2009, Ben Burton *
* For further details contact Ben Burton (bab@debian.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., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/* end stub */
#include <cstdio>
#include <sys/stat.h>
#include "foreign/pdf.h"
#include "packet/npdf.h"
namespace regina {
NPDF* readPDF(const char* filename) {
// Use FILE* so we can call fstat().
// Open the file.
FILE* in = fopen(filename, "rb");
if (! in)
return 0;
// Get the file size.
struct stat s;
if (fstat(fileno(in), &s)) {
fclose(in);
return 0;
}
size_t size = s.st_size;
if (size == 0) {
fclose(in);
return new NPDF();
}
// Read the file contents.
char* data = new char[size];
if (fread(data, 1, size, in) != size) {
fclose(in);
delete[] data;
return 0;
}
// Is there more to the file that we weren't expecting?
char c;
if (fread(&c, 1, 1, in) > 0) {
fclose(in);
delete[] data;
return 0;
}
// All good!
fclose(in);
return new NPDF(data, size, NPDF::OWN_NEW);
}
bool writePDF(const char* filename, const NPDF& pdf) {
// Use FILE* for symmetry with readPDF().
// Open the file.
FILE* out = fopen(filename, "wb");
if (!out)
return false;
// Is there anything to write?
const char* data = pdf.data();
if (data) {
size_t size = pdf.size();
if (fwrite(data, 1, size, out) != size) {
fclose(out);
return false;
}
}
// All done.
fclose(out);
return true;
}
} // namespace regina
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