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Redblack: Added macros for partial tree traversal and even more unit tests

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This commit is contained in:
Jan Maria Matejka 2018-12-03 13:55:35 +01:00
parent 4067ad1aa4
commit db1577e902
2 changed files with 37 additions and 6 deletions
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13
lib/redblack.h
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@ -131,6 +131,19 @@
#define REDBLACK_FIND(type, name, key, compare, root, what) \
({ type **pointer; REDBLACK_FIND_POINTER(name, key, compare, root, what, pointer); *pointer; })
#define REDBLACK_FIND_UP(type, name, key, compare, root, what) ({ \
type **pointer, *prev = NULL, *out; \
REDBLACK_FIND_POINTER(name, key, compare, root, what, pointer) \
prev = *pointer; \
if (!*pointer && prev) \
if (pointer == &(REDBLACK_RIGHT_CHILD(name, prev))) \
out = REDBLACK_NEXT(type, name, prev); \
else \
out = prev; \
else \
out = *pointer; \
out; \
})
#define REDBLACK_FIRST(type, name, root) ({ \
type *first = root; \

30
lib/redblack_test.c
View File

@ -10,6 +10,9 @@
#include "test/birdtest.h"
#include "lib/redblack.h"
#define N 4096
#define MUL 16
struct rb_test {
REDBLACK_NODE(struct rb_test, rb_);
int value;
@ -30,15 +33,30 @@ static void rb_dump(struct rb_test *root) {
fflush(stdout);
}
#define RB_CHECK(root) do { \
#define RB_CHECK(root, bits, total) do { \
REDBLACK_CHECK(struct rb_test, rb_, RBT_KEY, RBT_COMPARE, root); \
int tot = 0; \
for ( \
struct rb_test *last = NULL, *node = REDBLACK_FIRST(struct rb_test, rb_, root); \
node; \
last = node, node = REDBLACK_NEXT(struct rb_test, rb_, node) \
) \
) { \
ASSERT(BIT(RBT_KEY(node))); \
tot++; \
if (last) \
ASSERT(RBT_COMPARE(RBT_KEY(last), RBT_KEY(node)) < 0); \
} \
ASSERT(tot == total); \
int begin = bt_random() % N, end = bt_random() % N; \
if (begin > end) { int t = begin; begin = end; end = t; } \
bt_debug("Nodes from %d to %d:\n", begin, end); \
for ( \
struct rb_test *node = REDBLACK_FIND_UP(struct rb_test, rb_, RBT_KEY, RBT_COMPARE, root, begin); \
node && (RBT_COMPARE(RBT_KEY(node), end) < 0); \
node = REDBLACK_NEXT(struct rb_test, rb_, node) \
) \
bt_debug("%d\n", RBT_KEY(node)); \
bt_debug("Nodes done.\n"); \
} while (0)
#define RB_FIND(root, val, exists) do { \
@ -66,15 +84,13 @@ rb_insert(void)
{
struct rb_test *root = NULL;
#define N 4096
#define MUL 16
#define BIT(x) ((bits[(x) / 64] >> ((x) % 64)) & 1)
#define SIT(x) (bits[(x) / 64] |= (1ULL << ((x) % 64)))
#define CIT(x) (bits[(x) / 64] &= ~(1ULL << ((x) % 64)))
int total = 0;
u64 bits[N / 64] = {};
for (int i=0; i<N * MUL; i++) {
RB_CHECK(root);
RB_CHECK(root, bits, total);
if (bt_verbose >= BT_VERBOSE_ABSOLUTELY_ALL)
rb_dump(root);
@ -85,11 +101,13 @@ rb_insert(void)
bt_debug("Deleting existing value %d\n", tv);
fflush(stdout);
CIT(tv);
total--;
RB_DELETE(root, tv);
} else {
bt_debug("Inserting value %d\n", tv);
fflush(stdout);
SIT(tv);
total++;
RB_INSERT(root, tv);
}
}