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insert_quick_sort.c
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insert_quick_sort.c
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#include "insert_quick_sort.h"
int *_binary_search_incremental (int cards[], size_t card_num, int target)
{
int *left, *right, *mid, *pos;
pos = NULL;
left = cards, right = left + (card_num - 1);
if (target < *left) return left;
if (target > *right) return right + 1;
for (; left < right; ){
mid = left + (right - left) / 2;
if (*mid == target) return mid;
else if (target < *mid){
if (left == right - 1) return right;
right = mid;
continue;
}else{
if (left == right - 1) return right;
left = mid;
continue;
}
}
return NULL;
}
int *_binary_search_decremental (int cards[], size_t card_num, int target)
{
int *left, *right, *mid, *pos;
pos = NULL;
left = cards, right = left + (card_num - 1);
if (target < *right) return right + 1;
if (target > *left) return left;
for (; left < right; ){
mid = left + (right - left) / 2;
if (*mid == target) return mid;
else if (target > *mid){
if (left == right - 1) return left;
right = mid;
continue;
}else{
if (left == right - 1) return left;
left = mid;
continue;
}
}
return NULL;
}
int _insert_quick_sort_incremental (int cards[], size_t card_num)
{
if (cards[0] > cards[1]) swap_int(&cards[0], &cards[1]);
if (card_num == 2) return 0;
for (size_t i = 2; i <= card_num - 1; i++){
int *pos;
if ((pos = _binary_search_incremental(cards, i, cards[i])) == NULL){
return 1;
}
int tmp = cards[i];
if (pos != &cards[i]) memmove(pos + 1, pos, (i - (pos - cards)) * sizeof(int));
*pos = tmp;
}
return 0;
}
int _insert_quick_sort_decremental (int cards[], size_t card_num)
{
if (cards[0] < cards[1]) swap_int(&cards[0], &cards[1]);
if (card_num == 2) return 0;
for (size_t i = 2; i <= card_num - 1; i++){
int *pos;
if ((pos = _binary_search_decremental(cards, i, cards[i])) == NULL){
return 1;
}
int tmp = cards[i];
if (pos != &cards[i]) memmove(pos + 1, pos, (i - (pos - cards)) * sizeof(int));
*pos = tmp;
}
return 0;
}
int insert_quick_sort (int cards[], size_t card_num, int sort_order)
{
if (cards == NULL ||card_num <= 0 || sort_order == 0) return 1;
if (card_num == 1) return 0;
if (sort_order > 0){
if (_insert_quick_sort_incremental(cards, card_num)) return 2;
}
else if (_insert_quick_sort_decremental(cards, card_num)) return 3;
return 0;
}
/* test part */
/*#include <stdio.h>
#include "assist.h"
int get_random_number (int *num, int max)
{
struct timespec ts;
unsigned int rand;
if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) return 1;
rand = ts.tv_sec * ts.tv_nsec + ts.tv_sec + ts.tv_nsec;
srandom(rand);
double f;
f = 1.0 * max * random() / (RAND_MAX + 1LL);
*num = f;
return 0;
}
int randomize_cards (int cards[], size_t card_num)
{
if (card_num == 1) return 0;
else if (card_num == 2){
swap_int(&cards[0], &cards[1]);
return 0;
}
static int previous1, previous2;
static int pos1, pos2;
long max = card_num / 2;
for (long int i = 0; i <= max; i++){
do{
previous1 = pos1;
previous2 = pos2;
if (get_random_number(&pos1, card_num)) return 1;
if (get_random_number(&pos2, card_num)) return 1;
if (pos1 > card_num - 1 || pos2 > card_num - 1) continue;
}while (pos1 == pos2 || (pos1 == previous1 && pos2 == previous2) || (pos1 == previous2 && pos2 == previous1));
swap_int(&cards[pos1], &cards[pos2]);
}
return 0;
}
void print_cards (int cards[], size_t card_num)
{
printf("cards:");
for (long int i = 0; i < card_num; i++) printf(" %d", cards[i]);
printf("\n");
}
int main (void)
{
int *cards = NULL;
int *orig_cards = NULL;
size_t card_num = 80;
if ((cards = malloc(sizeof(int) * card_num)) == NULL || (orig_cards = malloc(sizeof(int) * card_num)) == NULL){
fprintf(stderr, "malloc failed.");
return 1;
}
for (long i = 0; i < card_num; i++){
orig_cards[i] = i;
cards[i] = i;
}
if (randomize_cards (cards, card_num)) err("randomize failed.");
printf("original ");
print_cards(orig_cards, card_num);
printf("randomized ");
print_cards(cards, card_num);
if (insert_quick_sort(cards, card_num, 1)) err("insert sort failed.");
for (long i = 0; i < card_num; i++){
if (cards[i] != orig_cards[i]){
printf("sort failed, cards[%ld]:%d, orig_cards[%ld]:%d.\n", i, cards[i], i, orig_cards[i]);
printf("sorted ");
print_cards(cards, card_num);
return 1;
}
}
printf("sort success.\n");
return 0;
}
*/