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day 25: memory cleanup, simplify puzzle input read

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This commit is contained in:
Bruno Raoult
2022-09-14 19:56:33 +02:00
parent 721f9da54e
commit ebb8a0d738
2 changed files with 56 additions and 27 deletions
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61
2021/day25/aoc-c.c
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@@ -112,29 +112,57 @@ static int step(struct map *map)
}
/**
* read-input() - read cuncumber map into memory.
* map_release() - release a map structure memory.
* @map: A pointer on a map structure.
*
*/
static void map_release(struct map *map)
{
if (map) {
if (map->cur)
free(map->cur);
if (map->next)
free(map->next);
free(map);
}
}
/**
* read_input() - read cuncumber map into memory.
*
* In case of success, the map structure and its cur and array components
* should be released for example by calling map_release().
*
* Return: a pointer to a map structure or NULL if failure.
*/
static struct map *read_input()
{
size_t alloc = 0;
ssize_t buflen;
struct map *map=malloc(sizeof(struct map));
struct map *map;
if (map) {
map->cur = NULL;
/* read whole input, we will keep '\n' and avoit useless splitting */
buflen = getdelim(&map->cur, &alloc, '\0', stdin);
map->next = strdup(map->cur);
map->ncols = strchr(map->cur, '\n') - map->cur;
/* we suppose there is nothing after the last input data last line
* Therefore last char of input is '\n', at position (bufflen - 1)
*/
map->nrows = (buflen - 1) / map->ncols;
/* use calloc() to ensure cur & next are set to NULL */
if (!(map = calloc(1, sizeof(struct map))))
goto end;
log(2, "buflen=%ld ncols=%d nrows=%d lastnl=%ld\n", buflen, map->ncols,
map->nrows, strrchr(map->cur, '\n') - map->cur);
}
/* read whole input, we will keep '\n' and avoid useless '\0' splitting */
if ((buflen = getdelim(&map->cur, &alloc, '\0', stdin)) < 0)
goto freemem;
if (!(map->next = strdup(map->cur)))
goto freemem;
map->ncols = strchr(map->cur, '\n') - map->cur;
/* next line works if there is nothing after the last input data last line,
* i.e. if last char of input (at position bufflen - 1) is the '\n' on the
* last valid puzzle line.
*/
map->nrows = (buflen - 1) / map->ncols;
log(2, "buflen=%ld ncols=%d nrows=%d lastnl=%ld\n", buflen, map->ncols,
map->nrows, strrchr(map->cur, '\n') - map->cur);
goto end;
freemem:
map_release(map);
end:
return map;
}
@@ -173,9 +201,10 @@ int main(int ac, char **av)
log(2, "+++ after step %d\n", cur);
print_map(map, 0);
}
printf("%s : res=%d\n", *av, cur);
map_release(map);
}
printf("%s : res=%d\n", *av, cur);
exit(0);
}