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/* file-p.c: file predicates.
Copyright 1992, 1993, 1994, 2008, 2015, 2016 Karl Berry.
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 2.1 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 <kpathsea/config.h>
#include <kpathsea/xstat.h>
/* Test whether FILENAME1 and FILENAME2 are actually the same file. If
stat fails on either of the names, we return false, without error. */
boolean
same_file_p (const_string filename1, const_string filename2)
{
#ifdef _WIN32
intptr_t handle1, handle2;
FILE *f1, *f2;
BY_HANDLE_FILE_INFORMATION fileinfo1, fileinfo2;
f1 = fopen(filename1, "r");
if(!f1) return false;
f2 = fopen(filename2, "r");
if(!f2) {
fclose(f1);
return false;
}
handle1 = _get_osfhandle(fileno(f1));
handle2 = _get_osfhandle(fileno(f2));
if (!GetFileInformationByHandle((HANDLE)handle1, &fileinfo1)) {
fclose(f1);
fclose(f2);
return false;
}
if (!GetFileInformationByHandle((HANDLE)handle2, &fileinfo2)) {
fclose(f1);
fclose(f2);
return false;
}
fclose(f1);
fclose(f2);
if (fileinfo1.dwVolumeSerialNumber == fileinfo2.dwVolumeSerialNumber &&
fileinfo1.nFileIndexHigh == fileinfo2.nFileIndexHigh &&
fileinfo1.nFileIndexLow == fileinfo2.nFileIndexLow)
return true;
else
return false;
#else
struct stat sb1, sb2;
/* These are put in variables only so the results can be inspected
under gdb. */
int r1 = stat (filename1, &sb1);
int r2 = stat (filename2, &sb2);
return r1 == 0 && r2 == 0 ? SAME_FILE_P (sb1, sb2) : false;
#endif
}
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