void
bubblesort(void *base, size_t nmemb, size_t size,
int (*cmpfunc)(const void *, const void *))
{
int swaptype;
char *tmp1 = (char *)base;
char *tmp2 = (char *)base + size;
SWAPINIT(base, size);
size_t i = 0;
size_t n = nmemb;
size_t nnew;
do {
nnew = 0;
for (i = 1; i <= n - 1; i++) {
tmp1 = (char *)base + (size * (i - 1));
tmp2 = (char *)base + (size * ((i - 1) + 1));
if (cmpfunc(tmp1, tmp2) > 0) {
swap(tmp1, tmp2);
nnew = i;
}
}
n = nnew;
} while (n > 0);
}
void recast_qsort(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
int d, r, swaptype, swap_cnt;
loop:
SWAPINIT(a, es);
swap_cnt = 0;
if (n < 7) {
for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
for (pl = pm;
pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pm = (char *)a + (n / 2) * es;
if (n > 7) {
pl = (char *)a;
pn = (char *)a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp, thunk);
pm = med3(pm - d, pm, pm + d, cmp, thunk);
pn = med3(pn - 2 * d, pn - d, pn, cmp, thunk);
}
pm = med3(pl, pm, pn, cmp, thunk);
}
swap((char *)a, pm);
pa = pb = (char *)a + es;
pc = pd = (char *)a + (n - 1) * es;
for (;;) {
while (pb <= pc && (r = CMP(thunk, pb, a)) <= 0) {
if (r == 0) {
swap_cnt = 1;
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (r = CMP(thunk, pc, a)) >= 0) {
if (r == 0) {
swap_cnt = 1;
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
swap_cnt = 1;
pb += es;
pc -= es;
}
if (swap_cnt == 0) { /* Switch to insertion sort */
for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
for (pl = pm;
pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pn = (char *)a + n * es;
r = min(pa - (char *)a, pb - pa);
vecswap((char *)a, pb - r, r);
r = min(pd - pc, pn - pd - es);
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es)
recast_qsort(a, r / es, es, thunk, cmp);
if ((r = pd - pc) > es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
}
void
yaffs_qsort(void *aa, size_t n, size_t es,
int (*cmp)(const void *, const void *))
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
int d, r, swaptype, swap_cnt;
register char *a = aa;
loop: SWAPINIT(a, es);
swap_cnt = 0;
if (n < 7) {
for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
pl -= es)
yswap(pl, pl - es);
return;
}
pm = (char *)a + (n / 2) * es;
if (n > 7) {
pl = (char *)a;
pn = (char *)a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp);
pm = med3(pm - d, pm, pm + d, cmp);
pn = med3(pn - 2 * d, pn - d, pn, cmp);
}
pm = med3(pl, pm, pn, cmp);
}
yswap(a, pm);
pa = pb = (char *)a + es;
pc = pd = (char *)a + (n - 1) * es;
for (;;) {
while (pb <= pc && (r = cmp(pb, a)) <= 0) {
if (r == 0) {
swap_cnt = 1;
yswap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (r = cmp(pc, a)) >= 0) {
if (r == 0) {
swap_cnt = 1;
yswap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
yswap(pb, pc);
swap_cnt = 1;
pb += es;
pc -= es;
}
if (swap_cnt == 0) { /* Switch to insertion sort */
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
pl -= es)
yswap(pl, pl - es);
return;
}
pn = (char *)a + n * es;
r = min(pa - (char *)a, pb - pa);
vecswap(a, pb - r, r);
r = min((long)(pd - pc), (long)(pn - pd - es));
vecswap(pb, pn - r, r);
r = pb - pa;
if (r > es)
yaffs_qsort(a, r / es, es, cmp);
r = pd - pc;
if (r > es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
/* yaffs_qsort(pn - r, r / es, es, cmp);*/
}
void qsort (
/* SYNOPSIS */
void * a,
size_t n,
size_t es,
int (* cmp)(const void *, const void *))
/* FUNCTION
Sort the array a. It contains n elements of the size es. Elements
are compares using the function cmp().
INPUTS
a - The array to sort
n - The number of elements in the array
es - The size of a single element in the array
cmp - The function which is called when two elements must be
compared. The function gets the addresses of two elements
of the array and must return 0 is both are equal, < 0 if
the first element is less than the second and > 0 otherwise.
RESULT
None.
NOTES
EXAMPLE
// Use this function to compare to stringpointers
int cmp_strptr (const char ** sptr1, const char ** sptr2)
{
return strcmp (*sptr1, *sptr2);
}
// Sort an array of strings
char ** strings;
// fill the array
strings = malloc (sizeof (char *)*4);
strings[0] = strdup ("h");
strings[1] = strdup ("a");
strings[2] = strdup ("f");
strings[3] = strdup ("d");
// Sort it
qsort (strings, sizeof (char *), 4, (void *)cmp_strptr);
BUGS
SEE ALSO
strcmp(), strncmp(), memcmp(), strcasecmp(), strncasecmp()
INTERNALS
******************************************************************************/
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
int d, r, swaptype, swap_cnt;
loop: SWAPINIT(a, es);
swap_cnt = 0;
if (n < 7) {
for (pm = a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pm = a + (n / 2) * es;
if (n > 7) {
pl = a;
pn = a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = (char *)med3(pl, pl + d, pl + 2 * d, cmp);
pm = (char *)med3(pm - d, pm, pm + d, cmp);
pn = (char *)med3(pn - 2 * d, pn - d, pn, cmp);
}
pm = (char *)med3(pl, pm, pn, cmp);
}
swap(a, pm);
pa = pb = a + es;
pc = pd = a + (n - 1) * es;
for (;;) {
while (pb <= pc && (r = cmp(pb, a)) <= 0) {
if (r == 0) {
swap_cnt = 1;
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (r = cmp(pc, a)) >= 0) {
if (r == 0) {
swap_cnt = 1;
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
swap_cnt = 1;
pb += es;
pc -= es;
}
if (swap_cnt == 0) { /* Switch to insertion sort */
for (pm = a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pn = a + n * es;
r = min(pa - (char *)a, pb - pa);
vecswap(a, pb - r, r);
r = min(pd - pc, pn - pd - es);
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es)
qsort(a, r / es, es, cmp);
if ((r = pd - pc) > es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
/* qsort(pn - r, r / es, es, cmp);*/
}
void
qsort_arg(void *a, size_t n, size_t es, qsort_arg_comparator cmp, void *arg)
{
char *pa,
*pb,
*pc,
*pd,
*pl,
*pm,
*pn;
int d,
r,
swaptype,
presorted;
loop:SWAPINIT(a, es);
if (n < 7)
{
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl, arg) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
presorted = 1;
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
{
if (cmp(pm - es, pm, arg) > 0)
{
presorted = 0;
break;
}
}
if (presorted)
return;
pm = (char *) a + (n / 2) * es;
if (n > 7)
{
pl = (char *) a;
pn = (char *) a + (n - 1) * es;
if (n > 40)
{
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp, arg);
pm = med3(pm - d, pm, pm + d, cmp, arg);
pn = med3(pn - 2 * d, pn - d, pn, cmp, arg);
}
pm = med3(pl, pm, pn, cmp, arg);
}
swap(static_cast<char *>(a), pm);
pa = pb = (char *) a + es;
pc = pd = (char *) a + (n - 1) * es;
for (;;)
{
while (pb <= pc && (r = cmp(pb, a, arg)) <= 0)
{
if (r == 0)
{
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (r = cmp(pc, a, arg)) >= 0)
{
if (r == 0)
{
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
pb += es;
pc -= es;
}
pn = (char *) a + n * es;
r = Min(pa - (char *) a, pb - pa);
vecswap(static_cast<char *>(a), pb - r, r);
r = Min(pd - pc, pn - pd - es);
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es)
qsort_arg(a, r / es, es, cmp, arg);
if ((r = pd - pc) > es)
{
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
/* qsort_arg(pn - r, r / es, es, cmp, arg);*/
}
void
qsort(void *a, size_t n, size_t es, cmp_t *cmp)
#endif
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
size_t d, r;
int cmp_result;
int swaptype, swap_cnt;
loop: SWAPINIT(a, es);
swap_cnt = 0;
if (n < 7) {
for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
for (pl = pm;
pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pm = (char *)a + (n / 2) * es;
if (n > 7) {
pl = (char *)a;
pn = (char *)a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp, thunk);
pm = med3(pm - d, pm, pm + d, cmp, thunk);
pn = med3(pn - 2 * d, pn - d, pn, cmp, thunk);
}
pm = med3(pl, pm, pn, cmp, thunk);
}
swap(a, pm);
pa = pb = (char *)a + es;
pc = pd = (char *)a + (n - 1) * es;
for (;;) {
while (pb <= pc && (cmp_result = CMP(thunk, pb, a)) <= 0) {
if (cmp_result == 0) {
swap_cnt = 1;
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (cmp_result = CMP(thunk, pc, a)) >= 0) {
if (cmp_result == 0) {
swap_cnt = 1;
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
swap_cnt = 1;
pb += es;
pc -= es;
}
if (swap_cnt == 0) { /* Switch to insertion sort */
for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
for (pl = pm;
pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pn = (char *)a + n * es;
r = min(pa - (char *)a, pb - pa);
vecswap((char*)a, (char *)(pb - r), r);
// !!! Ren/C: pn - pd - es => (long)(pn - pd - ps) for -Wsign-compare
r = min(pd - pc, (long)(pn - pd - es));
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es)
#ifdef I_AM_QSORT_R
qsort_r(a, r / es, es, thunk, cmp);
#else
qsort(a, r / es, es, cmp);
#endif
if ((r = pd - pc) > es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
/* qsort(pn - r, r / es, es, cmp);*/
}
void NS_QuickSort (
void *a,
unsigned int n,
unsigned int es,
cmp_t *cmp,
void *data
)
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
int d, r, swaptype;
loop: SWAPINIT(a, es);
/* Use insertion sort when input is small */
if (n < 7) {
for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
for (pl = pm; pl > (char *)a && cmp(pl - es, pl, data) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
/* Choose pivot */
pm = (char *)a + (n / 2) * es;
if (n > 7) {
pl = (char *)a;
pn = (char *)a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp, data);
pm = med3(pm - d, pm, pm + d, cmp, data);
pn = med3(pn - 2 * d, pn - d, pn, cmp, data);
}
pm = med3(pl, pm, pn, cmp, data);
}
swap(a, pm);
pa = pb = (char *)a + es;
pc = pd = (char *)a + (n - 1) * es;
/* loop invariants:
* [a, pa) = pivot
* [pa, pb) < pivot
* [pb, pc + es) unprocessed
* [pc + es, pd + es) > pivot
* [pd + es, pn) = pivot
*/
for (;;) {
while (pb <= pc && (r = cmp(pb, a, data)) <= 0) {
if (r == 0) {
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (r = cmp(pc, a, data)) >= 0) {
if (r == 0) {
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
pb += es;
pc -= es;
}
/* Move pivot values */
pn = (char *)a + n * es;
r = XPCOM_MIN(pa - (char *)a, pb - pa);
vecswap(a, pb - r, r);
r = XPCOM_MIN<size_t>(pd - pc, pn - pd - es);
vecswap(pb, pn - r, r);
/* Recursively process partitioned items */
if ((r = pb - pa) > (int)es)
NS_QuickSort(a, r / es, es, cmp, data);
if ((r = pd - pc) > (int)es) {
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
goto loop;
}
/* NS_QuickSort(pn - r, r / es, es, cmp, data);*/
}
static void
_pqsort(void *a, size_t n, size_t es,
int (*cmp) (const void *, const void *), void *lrange, void *rrange)
{
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
size_t d, r;
int swaptype, cmp_result;
loop: SWAPINIT(a, es);
if (n < 7) {
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
pl -= es)
swap(pl, pl - es);
return;
}
pm = (char *) a + (n / 2) * es;
if (n > 7) {
pl = (char *) a;
pn = (char *) a + (n - 1) * es;
if (n > 40) {
d = (n / 8) * es;
pl = med3(pl, pl + d, pl + 2 * d, cmp);
pm = med3(pm - d, pm, pm + d, cmp);
pn = med3(pn - 2 * d, pn - d, pn, cmp);
}
pm = med3(pl, pm, pn, cmp);
}
swap(a, pm);
pa = pb = (char *) a + es;
pc = pd = (char *) a + (n - 1) * es;
for (;;) {
while (pb <= pc && (cmp_result = cmp(pb, a)) <= 0) {
if (cmp_result == 0) {
swap(pa, pb);
pa += es;
}
pb += es;
}
while (pb <= pc && (cmp_result = cmp(pc, a)) >= 0) {
if (cmp_result == 0) {
swap(pc, pd);
pd -= es;
}
pc -= es;
}
if (pb > pc)
break;
swap(pb, pc);
pb += es;
pc -= es;
}
pn = (char *) a + n * es;
r = min(pa - (char *) a, pb - pa);
vecswap(a, pb - r, r);
r = min((size_t)(pd - pc), pn - pd - es);
vecswap(pb, pn - r, r);
if ((r = pb - pa) > es) {
void *_l = a, *_r = ((unsigned char*)a)+r-1;
if (!((lrange < _l && rrange < _l) ||
(lrange > _r && rrange > _r)))
_pqsort(a, r / es, es, cmp, lrange, rrange);
}
if ((r = pd - pc) > es) {
void *_l, *_r;
/* Iterate rather than recurse to save stack space */
a = pn - r;
n = r / es;
_l = a;
_r = ((unsigned char*)a)+r-1;
if (!((lrange < _l && rrange < _l) ||
(lrange > _r && rrange > _r)))
goto loop;
}
/* qsort(pn - r, r / es, es, cmp);*/
}
