punkty.c

#include "punkty.h"
#include <stdlib.h>

static int
bledne_punkty (punkty_t * pts, int size)
{
  return realloc (pts->x, size * sizeof *pts->x) == NULL
    || realloc (pts->y, size * sizeof *pts->y) == NULL;
}

int
czytaj_bledne_punkty (FILE * inf, punkty_t * pts)
{
  int size;
  double x, y;

  if (pts->n == 0) {
    pts->x = malloc (100 * sizeof *pts->x);
    if (pts->x == NULL)
      return 1;
    pts->y = malloc (100 * sizeof *pts->y);
    if (pts->y == NULL) {
      free (pts->x);
      return 1;
    }
    size = 100;
  }
  else
    size = pts->n;

  while (fscanf (inf, "%lf %lf", &x, &y) == 2) {
    pts->x[pts->n] = x;
    pts->y[pts->n] = y;
    pts->n++;
    if (!feof (inf) && pts->n == size) {
      if (bledne_punkty (pts, 2 * size))
        return 1;
      else
        size *= 2;
    }
  }

  if (pts->n != size)
    if (bledne_punkty (pts, pts->n))
      return 1;

  return 0;
}