348 lines
8.2 KiB
C
348 lines
8.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* search_map.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <hulamy@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/04/27 20:47:22 by hulamy #+# #+# */
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/* Updated: 2019/05/20 15:41:59 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "fillit.h"
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/*
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** OLD VERSION of find_place and fit_in_place all in one but with a lot of divisions and modulo
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**
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** int find_place(unsigned int *tab, t_fillist *list, int size, int pos)
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** {
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** int i;
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** int j;
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** unsigned int mask;
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** unsigned int tmp;
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**
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** mask = ~0u << (32 - list->width);
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** tmp = mask;
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** i = pos;
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** while (i < (size - list->height + 1) * size)
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** {
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** if (i % size == size - list->width + 1)
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** i += list->width - 1;
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** else
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** {
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** tmp = 0;
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** j = (list->height - 1) * size + i;
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** while (j >= i)
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** {
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** tmp >>= list->width;
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** tmp |= (mask & (tab[j / 32] << j));
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** tmp |= (mask & (tab[(j + list->width) / 32] >> (32 - j)));
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** j -= size;
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** }
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** if (!((tmp >> 16) & list->tetribit))
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** return (i + 1);
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** i++;
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** }
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** }
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** return (0);
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** }
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*/
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/*
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** function that try to optimize the speed
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** SECOND ATTEMPT
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** by finding the isolated dots whille fillling the map
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** untill they get more numerous than the max amount available
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** TOTAL FAILURE :p
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**
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** int check_others(unsigned int *map, t_fillist *list, int size, int num)
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** {
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** t_fillist *tmp;
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** int dots;
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** int total;
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** int i;
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** int j;
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**
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** dots = 0;
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** i = -1;
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** num *= 4;
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** total = size * size;
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** while (++i < total && dots <= total - num)
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** {
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** tmp = list->next;
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** j = 1;
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** // saute les position pas vides
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** while (1 << (i % 32) & map[i % 32])
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** i++;
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** // pour chaque position vide regarde si chaque tetri non encode places peuvent y rentrer
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** while (j && tmp)
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** {
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** // si le tetri est trop a droite ou trop en bas il ne rentre pas ce n'est pas la peine de chercher donc on passe au tetri suivant
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** if (tmp->width > (size - i % size) || (total - i) <= (tmp->height * size))
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** tmp = tmp->next;
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** // sinon verifier si on peut le mettre a cette position et si on ne peut pas passer au tetri suivant
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** else if (!fit_in_place(map, list, size, i))
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** tmp = tmp->next;
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** // si le tetri peut rentrer on arrete la boucle en mettant j = 0
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** else
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** j = 0;
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** }
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** // si j existe c que le tetri ne pouvait pas etre place donc on rajoute 1 au compteur de point isoles
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** if (j)
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** dots++;
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** }
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** return (dots > total - num);
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** }
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*/
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/*
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** function that try to optimize the speed
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** FIRST ATTEMPT
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** by verifying if the place left is enough to place at least
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** one of each tetri left
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** TOTAL FAILURE :p
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**
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** int check_others(unsigned int *map, t_fillist *list, int size, int num)
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** {
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** t_fillist *tmp;
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**
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** // verifie que les tetri restant puissent un par un se placer sur la map
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** // ca n'optimise qu'en fin de map donc ca ralentit les grosses map en fait
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** while ((tmp = tmp->next))
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** if (!find_place(map, tmp, size, 0))
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** return (0);
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** return (1);
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** }
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*/
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/*
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** function that look if a tretri fit in a place
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*/
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unsigned int fit_in_place(unsigned int *map, t_fillist *lst, int size, int i)
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{
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unsigned int tmp;
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unsigned int mask;
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unsigned int tetri;
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int n;
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int r;
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n = lst->num;
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r = lst->rank;
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i = lst->height;
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tetri = lst->tetribit << 16 >> lst->width;
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tmp = 0;
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mask = ~0u << (32 - lst->width);
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while (i--)
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{
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if (tmp & tetri)
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return (0);
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if (r >= 32 && ++n)
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r -= 32;
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tmp = (mask & (map[n] << r)) | (mask & (map[n + 1] >> (32 - r)));
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tetri <<= lst->width;
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r += size;
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}
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return (!(tmp & tetri));
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}
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/*
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** function that look for the first place in the map for a tetri
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*/
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int find_place(unsigned int *map, t_fillist *list, int size)
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{
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int limit;
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int pos;
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pos = list->position;
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list->place = pos % size;
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list->rank = pos % 32;
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list->num = pos / 32;
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limit = (size - list->height + 1) * size;
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while (pos < limit)
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{
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if (list->rank >= 32 && ++list->num)
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list->rank -= 32;
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if (list->place > size - list->width)
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{
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list->place = -1;
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pos += list->width - 2;
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list->rank += list->width - 2;
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}
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else if (fit_in_place(map, list, size, 0))
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return ((list->position = pos + 1));
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pos++;
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list->place++;
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list->rank++;
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}
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return (0);
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}
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/*
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** function that add or remove a tetri on the map
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*/
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void add_remove(unsigned int *map, t_fillist *list, int size)
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{
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unsigned int mask;
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unsigned short tetri;
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int i;
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int j;
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tetri = list->tetribit;
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mask = ~0u << (32 - list->width);
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i = (list->height - 1) * list->width;
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j = (list->height - 1) * size + list->position;
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while (j >= list->position)
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{
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map[(j - 1) / 32] ^= (mask & tetri << (16 + i)) >> (j - 1);
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map[(j - 1) / 32 + 1] ^= (mask & tetri << (16 + i)) << (32 - j) << 1;
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j -= size;
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i -= list->width;
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}
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}
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/*
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** Test optimisation for not testing wrong maps when tetri are identical
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*/
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int check_tetri_memory(t_fillist *list, int pos)
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{
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t_fillist *tetri;
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unsigned int mask;
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tetri = list;
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mask = 1 << ((pos % 32) - 1);
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if (tetri->same != NULL)
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{
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if (!(tetri->same->memory[pos / 32] & mask))
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{
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tetri->same->memory[pos / 32] |= mask;
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return (1);
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}
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}
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else
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{
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tetri->memory[pos / 32] |= mask;
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return (1);
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}
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return (0);
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}
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/*
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** Function that recursively try to fill the map with the tetris
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*/
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int fill_map(unsigned int *map, t_fillist *list, int size)
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{
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if (!list)
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return (1);
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list->position = 0;
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while (find_place(map, list, size))
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{
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add_remove(map, list, size);
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if (check_tetri_memory(list, list->position))
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if (fill_map(map, list->next, size))
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return (1);
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add_remove(map, list, size);
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}
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return (0);
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}
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/*
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** Test optimisation for not testing wrong maps when tetri are identical
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*/
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int compare_tetri(t_fillist *tetri_a, t_fillist *tetri_b)
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{
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if (tetri_a->tetribit != tetri_b->tetribit)
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return (0);
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if (tetri_a->width != tetri_b->width)
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return (0);
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if (tetri_a->height != tetri_b->height)
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return (0);
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return (1);
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}
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/*
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** Test optimisation for not testing wrong maps when tetri are identical
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*/
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int check_same_tetri(t_fillist *list, int num)
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{
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t_fillist *curr_tetri;
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t_fillist *next_tetri;
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int i;
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curr_tetri = list;
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while (curr_tetri != NULL)
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{
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curr_tetri->same = NULL;
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i = 0;
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if (!(curr_tetri->memory = (unsigned int *)malloc(sizeof(*curr_tetri->memory) * num)))
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return (0);
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while (i < num)
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curr_tetri->memory[i++] = 0;
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next_tetri = curr_tetri->next;
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while (next_tetri != NULL)
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{
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if (compare_tetri(curr_tetri, next_tetri))
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if (next_tetri->same == NULL)
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next_tetri->same = curr_tetri;
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next_tetri = next_tetri->next;
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}
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curr_tetri = curr_tetri->next;
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}
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return (0);
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}
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/*
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** function that send to "fill_map" a map of a certain size and increment its size untill it's solved
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*/
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int search_map(t_fillist *list)
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{
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t_fillist *tmp;
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unsigned int *map;
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int size;
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int num;
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int i;
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/////////////////////////////////////////////////// TEST
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unsigned int print;
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tmp = list;
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while (tmp)
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{
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// imression pour tests
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print = tmp->tetribit;
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print <<= 16;
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print_map(&print, tmp->width, tmp->height, tmp->letter);
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ft_putchar('\n');
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tmp = tmp->next;
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}
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/////////////////////////////////////////////////// TEST
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size = 2;
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num = 1;
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tmp = list;
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while ((tmp = tmp->next))
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num++;
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while (size * size < num * 4)
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size++;
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i = 0;
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while (!i)
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{
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num = (size * size) / 32 + 1;
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if (!(map = (unsigned int *)malloc(sizeof(*map) * num)))
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return (0);
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check_same_tetri(list, num);
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while (num)
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map[num--] = 0;
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i = fill_map(map, list, size++);
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}
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print_map(map, size - 1, size - 1, '#'); // DEBUG
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return (--size);
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}
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