reactos/rostests/kmtests/rtl/RtlSplayTree.c

/*
 * PROJECT:         ReactOS kernel-mode tests
 * LICENSE:         LGPLv2+ - See COPYING.LIB in the top level directory
 * PURPOSE:         Kernel-Mode Test Suite RtlGenericTable
 * PROGRAMMER:      arty
 */

#define KMT_EMULATE_KERNEL
#include <kmt_test.h>

#define NDEBUG
#include <debug.h>

static LIST_ENTRY Allocations;

static RTL_GENERIC_COMPARE_RESULTS NTAPI
CompareCharTable(PRTL_GENERIC_TABLE Table, PVOID A, PVOID B)
{
    RTL_GENERIC_COMPARE_RESULTS Result = (*((PCHAR)A) < *((PCHAR)B)) ? GenericLessThan :
        (*((PCHAR)A) > *((PCHAR)B)) ? GenericGreaterThan :
        GenericEqual;
    return Result;
}

static PVOID NTAPI
AllocRoutine(PRTL_GENERIC_TABLE Table, CLONG ByteSize)
{
    PLIST_ENTRY Entry = ExAllocatePool
        (NonPagedPool, sizeof(LIST_ENTRY) + ByteSize);
    InsertTailList(&Allocations, Entry);
    return &Entry[1];
}

static VOID NTAPI
FreeRoutine(PRTL_GENERIC_TABLE Table, PVOID Buffer)
{
    PLIST_ENTRY Entry = (PLIST_ENTRY)(((PCHAR)Buffer) - sizeof(LIST_ENTRY));
    RemoveEntryList(Entry);
    ExFreePool(Entry);
}

static void RtlSplayTreeTest()
{
    ULONG i, del;
    PCHAR Ch;
    CHAR Text[] = "the quick_brown!fOx-jUmp3d/0vER+THe^lazy.D@g";
    CHAR NewE[] = "11111111111111111111111111111111110111111111";
    RTL_GENERIC_TABLE Table;
    RtlInitializeGenericTable
        (&Table,
         CompareCharTable,
         AllocRoutine,
         FreeRoutine,
         NULL);
    for (i = 0; Text[i]; i++) {
        BOOLEAN WasNew;
        Ch = (PCHAR)RtlInsertElementGenericTable
            (&Table,
             &Text[i],
             sizeof(Text[i]),
             &WasNew);
        ok(Ch && *Ch == Text[i], "Copy character into node\n");
        ok(WasNew == (NewE[i] == '1'), "Character newness didn't match\n");
    }
    for (Ch = (PCHAR)RtlEnumerateGenericTable(&Table, TRUE), i = 0;
         Ch;
         Ch = (PCHAR)RtlEnumerateGenericTable(&Table, FALSE), i++) {
        ok(strchr(Text, *Ch) != NULL, "Nonexistent character\n");
    }
    ok(RtlNumberGenericTableElements(&Table) == strlen(Text) - 1, "Not the right number of elements\n");
    ok(RtlLookupElementGenericTable(&Table, "q") != NULL, "Could not lookup q\n");
    ok(!RtlLookupElementGenericTable(&Table, "#"), "Found a character that shouldn't appear\n");
    ok(strlen(Text) == i + 1, "Didn't enumerate enough characters\n");
    del = 0;
    for (i = 0; Text[i]; i++) {
        if (NewE[i] == '1') {
            BOOLEAN WasDeleted;
            WasDeleted = RtlDeleteElementGenericTable(&Table, &Text[i]);
            del += WasDeleted;
        }
    }
    ok(!RtlNumberGenericTableElements(&Table), "Not zero elements\n");
    ok(!RtlGetElementGenericTable(&Table, 0), "Elements left when we removed them all\n");
    ok(strlen(Text) == del + 1, "Deleted too many times\n");
    ok(IsListEmpty(&Allocations), "Didn't free all memory\n");
}

START_TEST(RtlSplayTree)
{
    InitializeListHead(&Allocations);
    RtlSplayTreeTest();
}