missing file from last checkin

diff --git a/map/map.c b/map/map.c
new file mode 100644 (file)
index 0000000..a8a7068
--- /dev/null
+++ b/map/map.c
@@ -0,0 +1,112 @@
+/* 
+ * Written by Josh Dybnis and released to the public domain, as explained at
+ * http://creativecommons.org/licenses/publicdomain
+ *
+ * generic interface for map-like data structures
+ */
+
+#include "common.h"
+#include "mlocal.h"
+#include "mem.h"
+#include "map.h"
+
+struct map {
+    map_type_e type;
+    void *impl;
+};
+
+map_t *map_alloc (map_type_e map_type) {
+    void *impl = NULL;
+    switch (map_type) {
+        case MAP_TYPE_HASHTABLE: impl = ht_alloc(); break;
+        case MAP_TYPE_SKIPLIST:  impl = sl_alloc(); break;
+        case MAP_TYPE_LIST:      impl = ll_alloc(); break;
+    }
+    map_t *map = NULL;
+    if (impl) {
+        map = nbd_malloc(sizeof(map_t));
+        map->type = map_type;
+        map->impl = impl;
+    }
+    return map;
+}
+
+void map_free (map_t *map) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: ht_free(map->impl); break;
+        case MAP_TYPE_SKIPLIST:  sl_free(map->impl); break;
+        case MAP_TYPE_LIST:      ll_free(map->impl); break;
+    }
+}
+
+void map_print (map_t *map) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: ht_print(map->impl); break;
+        case MAP_TYPE_SKIPLIST:  sl_print(map->impl); break;
+        case MAP_TYPE_LIST:      ll_print(map->impl); break;
+    }
+}
+
+uint64_t map_stat (map_t *map, map_stat_e stat_type) {
+    switch (stat_type) {
+        case MAP_STAT_COUNT: 
+            if (map->type != MAP_TYPE_HASHTABLE)
+                return ERROR_UNSUPPORTED_FEATURE;
+            return ht_count(map->impl);
+    }
+    return ERROR_INVALID_OPTION;
+}
+
+uint64_t map_get (map_t *map, const void *key_data, uint32_t key_len) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_get(map->impl, key_data, key_len);
+        case MAP_TYPE_SKIPLIST:  return sl_lookup(map->impl, key_data, key_len);
+        case MAP_TYPE_LIST:      return ll_lookup(map->impl, key_data, key_len);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}
+
+uint64_t map_set (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_cas(map->impl, key_data, key_len, CAS_EXPECT_WHATEVER, new_val);
+        case MAP_TYPE_SKIPLIST:  return sl_cas(map->impl, key_data, key_len, CAS_EXPECT_WHATEVER, new_val);
+        case MAP_TYPE_LIST:      return ll_cas(map->impl, key_data, key_len, CAS_EXPECT_WHATEVER, new_val);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}
+
+uint64_t map_add (map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_cas(map->impl, key_data, key_len, CAS_EXPECT_DOES_NOT_EXIST, new_val);
+        case MAP_TYPE_SKIPLIST:  return sl_cas(map->impl, key_data, key_len, CAS_EXPECT_DOES_NOT_EXIST, new_val);
+        case MAP_TYPE_LIST:      return ll_cas(map->impl, key_data, key_len, CAS_EXPECT_DOES_NOT_EXIST, new_val);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}
+
+uint64_t map_cas (map_t *map, const void *key_data, uint32_t key_len, uint64_t expected_val, uint64_t new_val) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_cas(map->impl, key_data, key_len, expected_val, new_val);
+        case MAP_TYPE_SKIPLIST:  return sl_cas(map->impl, key_data, key_len, expected_val, new_val);
+        case MAP_TYPE_LIST:      return ll_cas(map->impl, key_data, key_len, expected_val, new_val);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}
+
+uint64_t map_replace(map_t *map, const void *key_data, uint32_t key_len, uint64_t new_val) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_cas(map->impl, key_data, key_len, CAS_EXPECT_EXISTS, new_val);
+        case MAP_TYPE_SKIPLIST:  return sl_cas(map->impl, key_data, key_len, CAS_EXPECT_EXISTS, new_val);
+        case MAP_TYPE_LIST:      return ll_cas(map->impl, key_data, key_len, CAS_EXPECT_EXISTS, new_val);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}
+
+uint64_t map_remove (map_t *map, const void *key_data, uint32_t key_len) {
+    switch (map->type) {
+        case MAP_TYPE_HASHTABLE: return ht_remove(map->impl, key_data, key_len);
+        case MAP_TYPE_SKIPLIST:  return sl_remove(map->impl, key_data, key_len);
+        case MAP_TYPE_LIST:      return ll_remove(map->impl, key_data, key_len);
+    }
+    return ERROR_INVALID_ARGUMENT;
+}