kolibrios/programs/develop/ktcc/trunk/libctest/qsort.c

//#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "test.h"

static int scmp(const void *a, const void *b)
{
	return strcmp(*(char **)a, *(char **)b);
}

static int icmp(const void *a, const void *b)
{
	return *(int*)a - *(int*)b;
}

static int ccmp(const void *a, const void *b)
{
	return *(char*)a - *(char*)b;
}

static int cmp64(const void *a, const void *b)
{
	const uint64_t *ua = a, *ub = b;
	return *ua < *ub ? -1 : *ua != *ub;
}

/* 26 items -- even */
static const char *s[] = {
	"Bob", "Alice", "John", "Ceres",
	"Helga", "Drepper", "Emeralda", "Zoran",
	"Momo", "Frank", "Pema", "Xavier",
	"Yeva", "Gedun", "Irina", "Nono",
	"Wiener", "Vincent", "Tsering", "Karnica",
	"Lulu", "Quincy", "Osama", "Riley",
	"Ursula", "Sam"
};
static const char *s_sorted[] = {
	"Alice", "Bob", "Ceres", "Drepper",
	"Emeralda", "Frank", "Gedun", "Helga",
	"Irina", "John", "Karnica", "Lulu",
	"Momo", "Nono", "Osama", "Pema",
	"Quincy", "Riley", "Sam", "Tsering",
	"Ursula", "Vincent", "Wiener", "Xavier",
	"Yeva", "Zoran"
};

/* 23 items -- odd, prime */
static int n[] = {
	879045, 394, 99405644, 33434, 232323, 4334, 5454,
	343, 45545, 454, 324, 22, 34344, 233, 45345, 343,
	848405, 3434, 3434344, 3535, 93994, 2230404, 4334
};
static int n_sorted[] = {
	22, 233, 324, 343, 343, 394, 454, 3434,
	3535, 4334, 4334, 5454, 33434, 34344, 45345, 45545,
	93994, 232323, 848405, 879045, 2230404, 3434344, 99405644
};

static void str_test(const char **a, const char **a_sorted, int len)
{
	int i;
	qsort(a, len, sizeof *a, scmp);
	for (i=0; i<len; i++) {
		if (strcmp(a[i], a_sorted[i]) != 0) {
			t_error("string sort failed at index %d\n", i);
			t_printf("\ti\tgot\twant\n");
			for (i=0; i<len; i++)
				t_printf("\t%d\t%s\t%s\n", i, a[i], a_sorted[i]);
			break;
		}
	}
}

static void int_test(int *a, int *a_sorted, int len)
{
	int i;
	qsort(a, len, sizeof *a, icmp);
	for (i=0; i<len; i++) {
		if (a[i] != a_sorted[i]) {
			t_error("integer sort failed at index %d\n", i);
			t_printf("\ti\tgot\twant\n");
			for (i=0; i<len; i++)
				t_printf("\t%d\t%d\t%d\n", i, a[i], a_sorted[i]);
			break;
		}
	}
}

static void uint64_gen(uint64_t *p, uint64_t *p_sorted, int n)
{
	int i;
	uint64_t r = 0;
	t_randseed(n);
	for (i = 0; i < n; i++) {
		r += t_randn(20);
		p[i] = r;
	}
	memcpy(p_sorted, p, n * sizeof *p);
	t_shuffle(p, n);
}

static void uint64_test(uint64_t *a, uint64_t *a_sorted, int len)
{
	int i;
	qsort(a, len, sizeof *a, cmp64);
	for (i=0; i<len; i++) {
		if (a[i] != a_sorted[i]) {
			t_error("uint64 sort failed at index %d\n", i);
			t_printf("\ti\tgot\twant\n");
			for (i=0; i<len; i++)
				t_printf("\t%d\t%Ld \t%Ld\n", i, a[i], a_sorted[i]);
			break;
		}
	}
}

#define T(a, a_sorted) do { \
	char p[] = a; \
	qsort(p, sizeof p - 1, 1, ccmp); \
	if (memcmp(p, a_sorted, sizeof p) != 0) { \
		t_error("character sort failed\n"); \
		t_printf("\tgot:  \"%s\"\n", p); \
		t_printf("\twant: \"%s\"\n", a_sorted); \
	} \
} while(0)

static void char_test(void)
{
	T("", "");
	T("1", "1");
	T("11", "11");
	T("12", "12");
	T("21", "12");
	T("111", "111");
	T("211", "112");
	T("121", "112");
	T("112", "112");
	T("221", "122");
	T("212", "122");
	T("122", "122");
	T("123", "123");
	T("132", "123");
	T("213", "123");
	T("231", "123");
	T("321", "123");
	T("312", "123");
	T("1423", "1234");
	T("51342", "12345");
	T("261435", "123456");
	T("4517263", "1234567");
	T("37245618", "12345678");
	T("812436597", "123456789");
	T("987654321", "123456789");
	T("321321321", "111222333");
	T("49735862185236174", "11223344556677889");
	T("1", "This must fail");
}

int main(void)
{
	int i;

	str_test(s, s_sorted, sizeof s/sizeof*s);
	int_test(n, n_sorted, sizeof n/sizeof*n);
	char_test();
	for (i = 1023; i<=1026; i++) {
		uint64_t p[1026], p_sorted[1026];
		uint64_gen(p, p_sorted, i);
		uint64_test(p, p_sorted, i);
	}
	return t_status;
}