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Fix DPA_Search for sorted arrays.

This commit is contained in:
Felix Nawothnig 2005-08-01 09:18:23 +00:00 committed by Alexandre Julliard
parent d15e2f1472
commit 9fb00ff5c8
2 changed files with 7 additions and 24 deletions
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29
dlls/comctl32/dpa.c
View File

@ -787,11 +787,6 @@ BOOL WINAPI DPA_Sort (const HDPA hdpa, PFNDPACOMPARE pfnCompare, LPARAM lParam)
* RETURNS
* Success: index of the pointer in the array.
* Failure: -1
*
* NOTES
* Binary search taken from R.Sedgewick "Algorithms in C"!
* Function is NOT tested!
* If something goes wrong, blame HIM not ME! (Eric Kohl)
*/
INT WINAPI DPA_Search (const HDPA hdpa, LPVOID pFind, INT nStart,
PFNDPACOMPARE pfnCompare, LPARAM lParam, UINT uOptions)
@ -807,47 +802,35 @@ INT WINAPI DPA_Search (const HDPA hdpa, LPVOID pFind, INT nStart,
INT l, r, x, n;
LPVOID *lpPtr;
TRACE("binary search\n");
l = (nStart == -1) ? 0 : nStart;
r = hdpa->nItemCount - 1;
lpPtr = hdpa->ptrs;
while (r >= l) {
x = (l + r) / 2;
n = (pfnCompare)(pFind, lpPtr[x], lParam);
if (n < 0)
if (n == 0)
return x;
else if (n < 0)
r = x - 1;
else
else /* (n > 0) */
l = x + 1;
if (n == 0) {
TRACE("-- ret=%d\n", n);
return n;
}
}
if (uOptions & (DPAS_INSERTBEFORE | DPAS_INSERTAFTER)) {
TRACE("-- ret=%d\n", l);
return l;
}
return l;
}
else {
/* array is not sorted --> use linear search */
LPVOID *lpPtr;
INT nIndex;
TRACE("linear search\n");
nIndex = (nStart == -1)? 0 : nStart;
lpPtr = hdpa->ptrs;
for (; nIndex < hdpa->nItemCount; nIndex++) {
if ((pfnCompare)(pFind, lpPtr[nIndex], lParam) == 0) {
TRACE("-- ret=%d\n", nIndex);
if ((pfnCompare)(pFind, lpPtr[nIndex], lParam) == 0)
return nIndex;
}
}
}
TRACE("-- not found: ret=-1\n");
return -1;
}

2
dlls/comctl32/tests/dpa.c
View File

@ -274,7 +274,7 @@ static void test_dpa(void)
j = pDPA_GetPtrIndex(dpa, (PVOID)i);
ok(j+1 == i, "j=%d i=%d\n", j, i);
j = pDPA_Search(dpa, (PVOID)i, 0, CB_CmpLT, 0xdeadbeef, DPAS_SORTED);
if(i > 1) todo_wine ok(j+1 == i, "j=%d i=%d\n", j, i);
ok(j+1 == i, "j=%d i=%d\n", j, i);
/* Linear searches respect iStart ... */
j = pDPA_Search(dpa, (PVOID)i, i+1, CB_CmpLT, 0xdeadbeef, 0);