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/*****************************************************************************
*
* mtdev - Multitouch Protocol Translation Library (MIT license)
*
* Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
* Copyright (C) 2010 Canonical Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
****************************************************************************/
#include <../src/common.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
/*
* Combinatorial formulation
*
* x_ij = 1 if slot i and contact j are connected, zero otherwise
*
* sum_i x_ij <= 1 for all j; each contact picks at most one slot
*
* sum_j x_ij <= 1 for all i; each slot is picked by at most one contact
*
* sum_ij x_ij == min(nslot, npos); assign every contact possible
*
* Arrange x_ij as a bitmask; x_00 x_01 x_02.. x_10 x_11 x_12...
*
* Up to five slots, this is readily enumerable.
*/
#define SLOT_MAX 5
#define SLOT_CNT (SLOT_MAX + 1)
static int illegal(int nslot, int npos, unsigned x)
{
int i, j, sum;
for (j = 0; j < npos; j++) {
sum = 0;
for (i = 0; i < nslot; i++)
sum += GETBIT(x, i * npos + j);
if (sum > 1)
return 1;
}
for (i = 0; i < nslot; i++) {
sum = 0;
for (j = 0; j < npos; j++)
sum += GETBIT(x, i * npos + j);
if (sum > 1)
return 1;
}
sum = bitcount(x);
return sum != minval(nslot, npos);
}
static void get_slots(int *slots, int nslot, int npos, unsigned x)
{
int i;
memset(slots, -1, sizeof(slots[0]) * npos);
for (i = 0; i < nslot * npos; i++)
if (GETBIT(x, i))
slots[i % npos] = i / npos;
for (i = 0; i < npos; i++)
if (slots[i] < 0)
slots[i] = nslot++;
}
static int generate_assignments(int nslot, int npos)
{
static int ncol;
unsigned x, nx = BITMASK(nslot * npos);
int slots[SLOT_MAX];
int i, n = 0;
for (x = 0; x < nx; x++) {
if (illegal(nslot, npos, x))
continue;
for (i = 0; i < nslot * npos; i++) {
if (GETBIT(x, i)) {
if (ncol++ % 16 == 0)
printf("\n\t%d,", i);
else
printf(" %d,", i);
n++;
}
}
get_slots(slots, nslot, npos, x);
for (i = 0; i < npos; i++) {
if (ncol++ % 16 == 0)
printf("\n\t%d,", slots[i]);
else
printf(" %d,", slots[i]);
n++;
}
}
return n;
}
int main(int argc, char *argv[])
{
int ix[SLOT_CNT][SLOT_CNT], nix = 0;
int eslot, i, j;
if (argc < 2) {
fprintf(stderr, "usage: %s <num_slots>\n", argv[0]);
return 1;
}
eslot = atoi(argv[1]) + 1;
if (eslot > SLOT_CNT) {
fprintf(stderr, "allowed slot range: 2 - %d\n", SLOT_MAX);
return 1;
}
printf("\n/* generated by mtdev-kernel - do not edit */\n");
printf("static const u8 match_data[] = {");
for (i = 0; i < eslot; i++) {
for (j = 0; j < eslot; j++) {
ix[i][j] = nix;
nix += generate_assignments(i, j);
}
}
printf("\n};\n");
printf("\n/* generated by mtdev-kernel - do not edit */\n");
printf("static const int match_index[][%d] = {\n", eslot);
for (i = 0; i < eslot; i++) {
printf("\t{");
for (j = 0; j < eslot; j++)
printf(" %d%s", ix[i][j], j < eslot - 1 ? "," : "");
printf(" },\n");
}
printf("\t{ %d }\n", nix);
printf("};\n");
return 0;
}
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