day6: refactor

master
Avril 4 years ago
parent 28c6c83641
commit 5e49fe73da
Signed by: flanchan
GPG Key ID: 284488987C31F630

@ -20,6 +20,10 @@ static const char* const answers[] = {
#define NUM_QUESTIONS 26
typedef struct answer {
bool table[NUM_QUESTIONS];
} answers_t;
inline static char assert_in_bound(char i)
{
register int x=(int)i;
@ -30,37 +34,37 @@ inline static char assert_in_bound(char i)
return i;
}
static void populate(const char* from, bool answered [restrict NUM_QUESTIONS]) //wtf is this syntax? `bool* restrict a` -> `bool a[restrict N]`????
static void populate(const char* from, answers_t * restrict ans) //wtf is this syntax? `bool* restrict a` -> `bool a[restrict N]`????
{
while(*from)
answered[(int)assert_in_bound((*from++)-'a')] = true;
ans->table[(int)assert_in_bound((*from++)-'a')] = true;
}
static size_t count_ans(const bool answered[restrict NUM_QUESTIONS])
static size_t count_ans(const answers_t* restrict ans)
{
register size_t j=0;
for(register size_t i=0;i<NUM_QUESTIONS;i++)
j+= answered[i] ? 1 : 0;
j+= ans->table[i] ? 1 : 0;
return j;
}
inline static size_t reset(bool* restrict pop, bool answered[restrict NUM_QUESTIONS], size_t* restrict group_count)
inline static size_t reset(bool* restrict pop, answers_t * restrict ans, size_t* restrict group_count)
{
register size_t fullcnt=0;
if(pop) {
fullcnt = (*group_count = count_ans(answered));
if(*pop) {
fullcnt = (*group_count = count_ans(ans));
#ifdef DEBUG
fprintf(stderr, "Last group: %lu (fcnt %lu)\n" , *group_count, fullcnt);
#endif
}
pop = false;
memset(answered,0, NUM_QUESTIONS);
*pop = false;
memset(ans,0, sizeof(answers_t));
return fullcnt;
}
int main()
{
bool answered[NUM_QUESTIONS] = {false};
answers_t answered = {0};
size_t group_counts[answers_sz+1] = {0};
size_t fullcnt=0;
bool pop=false;
@ -69,14 +73,14 @@ int main()
{
const char* current = answers[i];
if(*current) {
populate(current, answered);
populate(current, &answered);
pop=true;
} else {
fullcnt += reset(&pop, answered, &group_counts[j++]);
fullcnt += reset(&pop, &answered, &group_counts[j++]);
}
}
fullcnt+= reset(&pop, answered, group_counts +answers_sz);
fullcnt+= reset(&pop, &answered, group_counts +answers_sz);
printf("%lu\n", fullcnt);
return 0;

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