lib: import ccan modules for tdb2

Imported from git://git.ozlabs.org/~ccan/ccan init-1161-g661d41f

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

2 files changed, 352 insertions, 0 deletions

diff --git a/lib/ccan/htable/test/run-type.c b/lib/ccan/htable/test/run-type.c
new file mode 100644
index 0000000000..02dac29e10
--- /dev/null
+++ b/lib/ccan/htable/test/run-type.c
@@ -0,0 +1,176 @@
+#include <ccan/htable/htable_type.h>
+#include <ccan/htable/htable.c>
+#include <ccan/tap/tap.h>
+#include <stdbool.h>
+#include <string.h>
+
+#define NUM_VALS (1 << HTABLE_BASE_BITS)
+
+struct obj {
+	/* Makes sure we don't try to treat and obj as a key or vice versa */
+	unsigned char unused;
+	unsigned int key;
+};
+
+static const unsigned int *objkey(const struct obj *obj)
+{
+	return &obj->key;
+}
+
+/* We use the number divided by two as the hash (for lots of
+   collisions), plus set all the higher bits so we can detect if they
+   don't get masked out. */
+static size_t objhash(const unsigned int *key)
+{
+	size_t h = *key / 2;
+	h |= -1UL << HTABLE_BASE_BITS;
+	return h;
+}
+
+static bool cmp(const struct obj *obj, const unsigned int *key)
+{
+	return obj->key == *key;
+}
+
+HTABLE_DEFINE_TYPE(struct obj, objkey, objhash, cmp, obj);
+
+static void add_vals(struct htable_obj *ht,
+		     struct obj val[], unsigned int num)
+{
+	unsigned int i;
+
+	for (i = 0; i < num; i++) {
+		if (htable_obj_get(ht, &i)) {
+			fail("%u already in hash", i);
+			return;
+		}
+		htable_obj_add(ht, &val[i]);
+		if (htable_obj_get(ht, &i) != &val[i]) {
+			fail("%u not added to hash", i);
+			return;
+		}
+	}
+	pass("Added %u numbers to hash", i);
+}
+
+static void find_vals(const struct htable_obj *ht,
+		      const struct obj val[], unsigned int num)
+{
+	unsigned int i;
+
+	for (i = 0; i < num; i++) {
+		if (htable_obj_get(ht, &i) != &val[i]) {
+			fail("%u not found in hash", i);
+			return;
+		}
+	}
+	pass("Found %u numbers in hash", i);
+}
+
+static void del_vals(struct htable_obj *ht,
+		     const struct obj val[], unsigned int num)
+{
+	unsigned int i;
+
+	for (i = 0; i < num; i++) {
+		if (!htable_obj_delkey(ht, &val[i].key)) {
+			fail("%u not deleted from hash", i);
+			return;
+		}
+	}
+	pass("Deleted %u numbers in hash", i);
+}
+
+static void del_vals_bykey(struct htable_obj *ht,
+			   const struct obj val[], unsigned int num)
+{
+	unsigned int i;
+
+	for (i = 0; i < num; i++) {
+		if (!htable_obj_delkey(ht, &i)) {
+			fail("%u not deleted by key from hash", i);
+			return;
+		}
+	}
+	pass("Deleted %u numbers by key from hash", i);
+}
+
+static bool check_mask(struct htable *ht, const struct obj val[], unsigned num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (((uintptr_t)&val[i] & ht->common_mask) != ht->common_bits)
+			return false;
+	}
+	return true;
+}
+
+int main(int argc, char *argv[])
+{
+	unsigned int i;
+	struct htable_obj *ht;
+	struct obj val[NUM_VALS];
+	unsigned int dne;
+	void *p;
+	struct htable_obj_iter iter;
+
+	plan_tests(20);
+	for (i = 0; i < NUM_VALS; i++)
+		val[i].key = i;
+	dne = i;
+
+	ht = htable_obj_new();
+	ok1(((struct htable *)ht)->max < (1 << ((struct htable *)ht)->bits));
+	ok1(((struct htable *)ht)->bits == HTABLE_BASE_BITS);
+
+	/* We cannot find an entry which doesn't exist. */
+	ok1(!htable_obj_get(ht, &dne));
+
+	/* Fill it, it should increase in size (once). */
+	add_vals(ht, val, NUM_VALS);
+	ok1(((struct htable *)ht)->bits == HTABLE_BASE_BITS + 1);
+	ok1(((struct htable *)ht)->max < (1 << ((struct htable *)ht)->bits));
+
+	/* Mask should be set. */
+	ok1(((struct htable *)ht)->common_mask != 0);
+	ok1(((struct htable *)ht)->common_mask != -1);
+	ok1(check_mask((struct htable *)ht, val, NUM_VALS));
+
+	/* Find all. */
+	find_vals(ht, val, NUM_VALS);
+	ok1(!htable_obj_get(ht, &dne));
+
+	/* Walk once, should get them all. */
+	i = 0;
+	for (p = htable_obj_first(ht,&iter); p; p = htable_obj_next(ht, &iter))
+		i++;
+	ok1(i == NUM_VALS);
+
+	/* Delete all. */
+	del_vals(ht, val, NUM_VALS);
+	ok1(!htable_obj_get(ht, &val[0].key));
+
+	/* Worst case, a "pointer" which doesn't have any matching bits. */
+	htable_add((struct htable *)ht, 0,
+		   (void *)~(uintptr_t)&val[NUM_VALS-1]);
+	htable_obj_add(ht, &val[NUM_VALS-1]);
+	ok1(((struct htable *)ht)->common_mask == 0);
+	ok1(((struct htable *)ht)->common_bits == 0);
+	/* Delete the bogus one before we trip over it. */
+	htable_del((struct htable *)ht, 0,
+		   (void *)~(uintptr_t)&val[NUM_VALS-1]);
+
+	/* Add the rest. */
+	add_vals(ht, val, NUM_VALS-1);
+
+	/* Check we can find them all. */
+	find_vals(ht, val, NUM_VALS);
+	ok1(!htable_obj_get(ht, &dne));
+
+	/* Delete them all by key. */
+	del_vals_bykey(ht, val, NUM_VALS);
+	htable_obj_free(ht);
+
+	return exit_status();
+}
diff --git a/lib/ccan/htable/test/run.c b/lib/ccan/htable/test/run.c
new file mode 100644
index 0000000000..ece46a0fd7
--- /dev/null
+++ b/lib/ccan/htable/test/run.c
@@ -0,0 +1,176 @@
+#include <ccan/htable/htable.h>
+#include <ccan/htable/htable.c>
+#include <ccan/tap/tap.h>
+#include <stdbool.h>
+#include <string.h>
+
+#define NUM_VALS (1 << HTABLE_BASE_BITS)
+
+/* We use the number divided by two as the hash (for lots of
+   collisions), plus set all the higher bits so we can detect if they
+   don't get masked out. */
+static size_t hash(const void *elem, void *unused)
+{
+	size_t h = *(uint64_t *)elem / 2;
+	h |= -1UL << HTABLE_BASE_BITS;
+	return h;
+}
+
+static bool objcmp(const void *htelem, void *cmpdata)
+{
+	return *(uint64_t *)htelem == *(uint64_t *)cmpdata;
+}
+
+static void add_vals(struct htable *ht,
+		     const uint64_t val[], unsigned int num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (htable_get(ht, hash(&i, NULL), objcmp, &i)) {
+			fail("%llu already in hash", (long long)i);
+			return;
+		}
+		htable_add(ht, hash(&val[i], NULL), &val[i]);
+		if (htable_get(ht, hash(&i, NULL), objcmp, &i) != &val[i]) {
+			fail("%llu not added to hash", (long long)i);
+			return;
+		}
+	}
+	pass("Added %llu numbers to hash", (long long)i);
+}
+
+#if 0
+static void refill_vals(struct htable *ht,
+			const uint64_t val[], unsigned int num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (htable_get(ht, hash(&i, NULL), objcmp, &i))
+			continue;
+		htable_add(ht, hash(&val[i], NULL), &val[i]);
+	}
+}
+#endif
+
+static void find_vals(struct htable *ht,
+		      const uint64_t val[], unsigned int num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (htable_get(ht, hash(&i, NULL), objcmp, &i) != &val[i]) {
+			fail("%llu not found in hash", (long long)i);
+			return;
+		}
+	}
+	pass("Found %llu numbers in hash", (long long)i);
+}
+
+static void del_vals(struct htable *ht,
+		     const uint64_t val[], unsigned int num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (!htable_del(ht, hash(&val[i], NULL), &val[i])) {
+			fail("%llu not deleted from hash", (long long)i);
+			return;
+		}
+	}
+	pass("Deleted %llu numbers in hash", (long long)i);
+}
+
+static bool check_mask(struct htable *ht, uint64_t val[], unsigned num)
+{
+	uint64_t i;
+
+	for (i = 0; i < num; i++) {
+		if (((uintptr_t)&val[i] & ht->common_mask) != ht->common_bits)
+			return false;
+	}
+	return true;
+}
+
+int main(int argc, char *argv[])
+{
+	unsigned int i;
+	uintptr_t perfect_bit;
+	struct htable *ht;
+	uint64_t val[NUM_VALS];
+	uint64_t dne;
+	void *p;
+	struct htable_iter iter;
+
+	plan_tests(23);
+	for (i = 0; i < NUM_VALS; i++)
+		val[i] = i;
+	dne = i;
+
+	ht = htable_new(hash, NULL);
+	ok1(ht->max < (1 << ht->bits));
+	ok1(ht->bits == HTABLE_BASE_BITS);
+
+	/* We cannot find an entry which doesn't exist. */
+	ok1(!htable_get(ht, hash(&dne, NULL), objcmp, &dne));
+
+	/* Fill it, it should increase in size (once). */
+	add_vals(ht, val, NUM_VALS);
+	ok1(ht->bits == HTABLE_BASE_BITS + 1);
+	ok1(ht->max < (1 << ht->bits));
+
+	/* Mask should be set. */
+	ok1(ht->common_mask != 0);
+	ok1(ht->common_mask != -1);
+	ok1(check_mask(ht, val, NUM_VALS));
+
+	/* Find all. */
+	find_vals(ht, val, NUM_VALS);
+	ok1(!htable_get(ht, hash(&dne, NULL), objcmp, &dne));
+
+	/* Walk once, should get them all. */
+	i = 0;
+	for (p = htable_first(ht,&iter); p; p = htable_next(ht, &iter))
+		i++;
+	ok1(i == NUM_VALS);
+
+	/* Delete all. */
+	del_vals(ht, val, NUM_VALS);
+	ok1(!htable_get(ht, hash(&val[0], NULL), objcmp, &val[0]));
+
+	/* Worst case, a "pointer" which doesn't have any matching bits. */
+	htable_add(ht, 0, (void *)~(uintptr_t)&val[NUM_VALS-1]);
+	htable_add(ht, hash(&val[NUM_VALS-1], NULL), &val[NUM_VALS-1]);
+	ok1(ht->common_mask == 0);
+	ok1(ht->common_bits == 0);
+	/* Get rid of bogus pointer before we trip over it! */
+	htable_del(ht, 0, (void *)~(uintptr_t)&val[NUM_VALS-1]);
+
+	/* Add the rest. */
+	add_vals(ht, val, NUM_VALS-1);
+
+	/* Check we can find them all. */
+	find_vals(ht, val, NUM_VALS);
+	ok1(!htable_get(ht, hash(&dne, NULL), objcmp, &dne));
+
+	htable_free(ht);
+
+	/* Corner cases: wipe out the perfect bit using bogus pointer. */
+	ht = htable_new(hash, NULL);
+	htable_add(ht, 0, (void *)((uintptr_t)&val[NUM_VALS-1]));
+	ok1(ht->perfect_bit);
+	perfect_bit = ht->perfect_bit;
+	htable_add(ht, 0, (void *)((uintptr_t)&val[NUM_VALS-1]
+				   | perfect_bit));
+	ok1(ht->perfect_bit == 0);
+	htable_del(ht, 0, (void *)((uintptr_t)&val[NUM_VALS-1] | perfect_bit));
+
+	/* Enlarging should restore it... */
+	add_vals(ht, val, NUM_VALS-1);
+
+	ok1(ht->perfect_bit != 0);
+	htable_free(ht);
+
+	return exit_status();
+}