86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* Copyright (C) 2022 Camden Dixie O'Brien
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this program. If not, see
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* <https://www.gnu.org/licenses/>.
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*/
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#include "sud.h"
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#include <stdio.h>
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#define Q(x) #x
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#define PRLUT(x) prlut(Q(x), x)
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static void prlut(const char *name, unsigned lut[NCELLS][NDIGITS - 1])
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{
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unsigned i, j;
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printf("const unsigned %s[NCELLS][NDIGITS - 1] = {\n", name);
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for (i = 0; i < NCELLS; ++i) {
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fputs("\t{ ", stdout);
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for (j = 0; j < NDIGITS - 1; ++j) {
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printf("%2u", lut[i][j]);
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if (j != NDIGITS - 2)
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putchar(',');
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putchar(' ');
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}
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fputs("},\n", stdout);
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}
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fputs("};\n", stdout);
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}
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int main(void)
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{
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unsigned rowidx_lut[NCELLS][NDIGITS - 1];
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unsigned colidx_lut[NCELLS][NDIGITS - 1];
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unsigned segidx_lut[NCELLS][NDIGITS - 1];
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unsigned rowi, coli, segi, r, c, i, j, sr, sc;
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/* Populate tables. */
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for (r = 0; r < NDIGITS; ++r) {
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for (c = 0; c < NDIGITS; ++c) {
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/* Calculate row and column indices. */
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rowi = coli = 0;
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for (i = 0; i < NDIGITS; ++i) {
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if (i != c)
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rowidx_lut[r * NDIGITS + c][rowi++] = r * NDIGITS + i;
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if (i != r)
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colidx_lut[r * NDIGITS + c][coli++] = i * NDIGITS + c;
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}
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/* Calculate segment indices. */
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segi = 0;
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sr = SEGLEN * (r / SEGLEN);
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sc = SEGLEN * (c / SEGLEN);
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for (i = sr; i < sr + SEGLEN; ++i) {
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for (j = sc; j < sc + SEGLEN; ++j) {
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if (i == r && j == c)
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continue;
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segidx_lut[r * NDIGITS + c][segi++] = i * NDIGITS + j;
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}
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}
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}
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}
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printf("/*\n * This file is auto-generated; do not edit.\n */\n\n");
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printf("#include \"lut.h\"\n\n");
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PRLUT(rowidx_lut);
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putchar('\n');
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PRLUT(colidx_lut);
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putchar('\n');
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PRLUT(segidx_lut);
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return 0;
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}
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