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allocate perfect size for malloc

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Mylloon 2022-11-15 10:43:47 +01:00
parent caa56946d0
commit 1e237fbaeb
Signed by: Anri
GPG key ID: A82D63DFF8D1317F
1 changed files with 15 additions and 6 deletions
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21
src/plateau.c
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@ -1,4 +1,5 @@
#include "../includes/plateau.h" #include "../includes/plateau.h"
#include <stdio.h>
Table *generate_table(GLuint width, GLuint height, Pos origin, Uint32 color) { Table *generate_table(GLuint width, GLuint height, Pos origin, Uint32 color) {
Table *table = malloc(sizeof(Table)); Table *table = malloc(sizeof(Table));
@ -10,15 +11,23 @@ Table *generate_table(GLuint width, GLuint height, Pos origin, Uint32 color) {
table->nb_columns = table->nb_row = 7; table->nb_columns = table->nb_row = 7;
// FIX: Allocate too much memory here GLuint wPas = table->width / table->nb_columns,
table->lines = malloc(table->nb_row * table->nb_columns * 4 * sizeof(int)); hPas = table->height / table->nb_row, wMax = table->width - wPas,
hMax = table->height - hPas;
// Calcul l'espace neccessaire
int space_needed = 0;
for (GLuint i = wPas; i < wMax; i += wPas, space_needed += 4) {
for (GLuint j = hPas; j < hMax; j += hPas, space_needed += 4) {
}
}
table->lines = malloc(space_needed * sizeof(int));
assert(table->lines != NULL); assert(table->lines != NULL);
int *tmp = table->lines; int *tmp = table->lines;
for (GLuint wPas = table->width / table->nb_columns, i = wPas; for (GLuint i = wPas; i < wMax; i += wPas, tmp += 4) {
i < table->width - wPas; i += wPas, tmp += 4) { for (GLuint j = hPas; j < hMax; j += hPas, tmp += 4) {
for (GLuint hPas = table->height / table->nb_row, j = hPas;
j < table->height - hPas; j += hPas, tmp += 4) {
*tmp = table->width; *tmp = table->width;
*(tmp + 1) = j; *(tmp + 1) = j;
*(tmp + 2) = origin.x; *(tmp + 2) = origin.x;