127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
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#include <knotkit.h>
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const char *program_name;
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void
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usage ()
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{
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printf ("usage: %s [-f] [-h] [-o <file>] [-v] <knot>\n", program_name);
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printf (" compute Szabo's geometric spectral sequence for knot <knot>\n");
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printf ("options:\n");
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printf (" -f : compute unreduced spectral sequence\n");
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printf (" (reduced is the default)\n");
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printf (" -h : print this message\n");
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printf (" -o <file> : write output to <file>\n");
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printf (" (stdout is the default)\n");
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printf (" -v : verbose: report progress as the computation proceeds\n");
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printf ("<knot> can be one of:\n");
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printf (" - the unknot, e.g. U or unknot\n");
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printf (" - a torus knot, e.g. T(2,3)\n");
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printf (" - a Rolfsen table knot, e.g. 10_124\n");
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printf (" - a Hoste-Thistlethwaite-Weeks knot, e.g. 11a12 or 12n214\n");
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printf (" - a Morwen Thistlethwaite link, e.g. L9a21 or L14n7631\n");
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printf (" - a planar diagram, e.g.\n");
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printf (" PD[X[1, 4, 2, 5], X[3, 6, 4, 1], X[5, 2, 6, 3]] or\n");
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printf (" PD[[1, 4, 2, 5], [3, 6, 4, 1], [5, 2, 6, 3]]\n");
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printf (" - a Dowker-Thistlethwaite code, e.g.\n");
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printf (" DTCode[6,8,2,4],\n");
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printf (" DT[dadbcda] or\n");
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printf (" DT[{6, -8}, {-10, 12, -14, 2, -4}]\n");
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printf (" - a braid, e.g. BR[2, {-1, -1, -1}]\n");
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}
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int
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main (int argc, char **argv)
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{
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program_name = argv[0];
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bool reduced = 1;
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const char *knot = 0;
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const char *file = 0;
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for (int i = 1; i < argc; i ++)
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{
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if (argv[i][0] == '-')
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{
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if (strcmp (argv[i], "-f") == 0)
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reduced = 0;
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else if (strcmp (argv[i], "-h") == 0)
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{
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usage ();
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exit (EXIT_SUCCESS);
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}
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else if (!strcmp (argv[i], "-v"))
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verbose = 1;
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else if (!strcmp (argv[i], "-o"))
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{
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i ++;
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if (i == argc)
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{
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fprintf (stderr, "error: missing argument to option `-o'\n");
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exit (EXIT_FAILURE);
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}
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file = argv[i];
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}
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else
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{
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fprintf (stderr, "error: unknown argument `%s'\n", argv[1]);
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usage ();
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exit (EXIT_FAILURE);
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}
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}
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else
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{
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if (knot)
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{
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fprintf (stderr, "error: too many arguments\n");
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usage ();
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exit (EXIT_FAILURE);
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}
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else
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knot = argv[i];
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}
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}
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if (!knot)
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{
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fprintf (stderr, "error: missing <knot> argument\n");
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usage ();
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exit (EXIT_FAILURE);
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}
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FILE *outfp = 0;
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if (file)
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{
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outfp = fopen (file, "w");
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if (!outfp)
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{
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stderror ("fopen: %s", file);
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exit (EXIT_FAILURE);
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}
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}
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else
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outfp = stdout;
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knot_diagram d = parse_knot (knot);
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d.marked_edge = 1;
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cube<Z2> c (d, reduced);
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fprintf (outfp, "\\documentclass{article}\n\
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\\usepackage{amsmath, tikz, hyperref}\n\
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\\DeclareMathOperator{\\rank}{rank}\n\
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\\setlength{\\parindent}{0pt}\n\
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\n\
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\\begin{document}\n\
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\\pagestyle{empty}\n\
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\\tableofcontents\n\
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\\sloppy\n");
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compute_szabo_sseq (c).texshow (outfp, d.name);
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fprintf (outfp, "\\end{document}\n");
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if (file)
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fclose (outfp);
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}
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