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// cssutil.c - utility for munging css files, version X0.1
// Copyright 2001-2004 William S. Yerazunis, all rights reserved.
//
// 2005-05-02 Milan Zamazal <pdm@debian.org>: Patch by
// Paolo <oopla-iA+eEnwkJgzk1uMJSBkQmQ@public.gmane.org> applied not to
// crash when the compared files are read-only.
//
// This software is licensed to the public under the Free Software
// Foundation's GNU GPL, version 2.0. You may obtain a copy of the
// GPL by visiting the Free Software Foundations web site at
// www.fsf.org . Other licenses may be negotiated; contact the
// author for details.
//
// include some standard files
#include "crm114_sysincludes.h"
// include any local crm114 configuration file
#include "crm114_config.h"
// include the crm114 data structures file
#include "crm114_structs.h"
// and include the routine declarations file
#include "crm114.h"
int main (int argc, char **argv)
{
long i,j,k; // some random counters, when we need a loop
long hfsize, hfsize1, hfsize2;
long f1, f2;
long sim, diff, dom1, dom2, hclash, kclash;
{
struct stat statbuf; // filestat buffer
FEATUREBUCKET_TYPE *h1, *h2; // the text of the hash file
// filename is argv [1]
// and stat it to get it's length
if(!argv[1] || !argv[2])
{
fprintf (stdout, "Usage: cssdiff <cssfile1> <cssfile2>\n");
return (EXIT_SUCCESS);
};
// quick check- does the first file even exist?
k = stat (argv[1], &statbuf);
if (k != 0)
{
fprintf (stderr, "\n CSS file '%s' not found. \n", argv[1]);
exit (EXIT_FAILURE);
};
//
hfsize = statbuf.st_size;
// mmap the hash file into memory so we can bitwhack it
h1 = (FEATUREBUCKET_TYPE *) crm_mmap_file_1 (0, argv[1], hfsize, 1);
if (h1 == NULL)
{
fprintf (stderr, "\n Could not open file %s\n",
argv[1]);
exit (EXIT_FAILURE);
};
if (h1 == MAP_FAILED)
{
fprintf (stderr, "\n MMAP failed on file %s\n",
argv[1]);
exit (EXIT_FAILURE);
};
hfsize1 = statbuf.st_size / sizeof (FEATUREBUCKET_TYPE);
//
// and repeat the process for the second file:
k = stat (argv[2], &statbuf);
// quick check- does the file even exist?
if (k != 0)
{
fprintf (stderr, "\n.CSS file '%s' not found.\n", argv[2]);
exit (EXIT_FAILURE);
};
hfsize2 = statbuf.st_size;
// mmap the hash file into memory so we can bitwhack it
h2 = (FEATUREBUCKET_TYPE *) crm_mmap_file_1 (0, argv[2], hfsize2, 1);
if (h2 == NULL)
{
fprintf (stderr, "\n Could not open file %s\n",
argv[2]);
exit (EXIT_FAILURE);
};
if (h2 == MAP_FAILED)
{
fprintf (stderr, "\n MMAP failed on file %s\n",
argv[2]);
exit (EXIT_FAILURE);
};
hfsize2 = hfsize2 / sizeof (FEATUREBUCKET_TYPE);
fprintf (stderr, "Sparse spectra file %s has %ld bins total\n",
argv[1], hfsize1);
fprintf (stdout, "Sparse spectra file %s has %ld bins total\n",
argv[2], hfsize2);
//
//
if (hfsize1 != hfsize2)
{
fprintf (stderr,
"\n.CSS files %s, %s :\n lengths differ: %ld vs %ld.\n",
argv[1],argv[2], hfsize1, hfsize2);
fprintf (stderr, "\n This is not a fatal error, but be warned.\n");
};
f1 = 0;
f2 = 0;
sim = 0;
diff = 0;
dom1 = 0;
dom2 = 0;
hclash = 0;
kclash = 0;
//
// The algorithm - for each file,
// for each bucket in each file
// find corresponding bucket in other file
// increment dom1 or dom2 as appropriate
// always increment sim and diff
// end
// end
// divide sim and diff by 2, as they are doublecounted
// print statistics and exit.
//
// start at 1 - no need to check bin 0 (version).
for ( i = 1; i < hfsize1; i++)
{
if ( h1[i].key != 0 )
{
f1 += h1[i].value;
k = h1[i].hash % hfsize2;
if (k == 0)
k = 1;
while (h2[k].value != 0 &&
(h2[k].hash != h1[i].hash
|| h2[k].key != h1[i].key))
{
k++;
if (k >= hfsize2) k = 1;
};
// Now we've found the corresponding (or vacant) slot in
// h2. Do our tallies...
j = h1[i].value ;
if (j > h2[k].value ) j = h2[k].value;
sim += j;
j = h1[i].value - h2[k].value;
if (j < 0) j = -j;
diff += j;
j = h1[i].value - h2[k].value;
if (j < 0) j = 0;
dom1 += j;
};
};
//
// And repeat for file 2.
for ( i = 1; i < hfsize2; i++)
{
if ( h2[i].key != 0 )
{
f2 += h2[i].value;
k = h2[i].hash % hfsize1;
if (k == 0)
k = 1;
while (h1[k].value != 0 &&
(h1[k].hash != h2[i].hash
|| h1[k].key != h2[i].key))
{
k++;
if (k >= hfsize1) k = 1;
};
// Now we've found the corresponding (or vacant) slot in
// h1. Do our tallies...
j = h2[i].value ;
if (j > h1[k].value ) j = h1[k].value;
sim += j;
j = h1[k].value - h2[i].value;
if (j < 0) j = -j;
diff += j;
j = h2[i].value - h1[k].value;
if (j < 0) j = 0;
dom2 += j;
};
};
fprintf (stdout, "\n File 1 total features : %12ld", f1);
fprintf (stdout, "\n File 2 total features : %12ld\n", f2);
fprintf (stdout, "\n Similarities between files : %12ld", sim/2);
fprintf (stdout, "\n Differences between files : %12ld\n", diff/2);
fprintf (stdout, "\n File 1 dominates file 2 : %12ld", dom1);
fprintf (stdout, "\n File 2 dominates file 1 : %12ld\n", dom2);
}
return 0;
}
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