Inital commit

lib/ is just [FoxNet](https://git.openpunk.com/CPunch/FoxNet) ported to C99

lib/include/hashmap.h

@@ -0,0 +1,54 @@
+// Copyright 2020 Joshua J Baker. All rights reserved.
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+#ifndef HASHMAP_H
+#define HASHMAP_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct hashmap;
+
+struct hashmap *hashmap_new(size_t elsize, size_t cap, 
+                            uint64_t seed0, uint64_t seed1,
+                            uint64_t (*hash)(const void *item, 
+                                             uint64_t seed0, uint64_t seed1),
+                            int (*compare)(const void *a, const void *b, 
+                                           void *udata),
+                            void (*elfree)(void *item),
+                            void *udata);
+struct hashmap *hashmap_new_with_allocator(
+                            void *(*malloc)(size_t), 
+                            void *(*realloc)(void *, size_t), 
+                            void (*free)(void*),
+                            size_t elsize, size_t cap, 
+                            uint64_t seed0, uint64_t seed1,
+                            uint64_t (*hash)(const void *item, 
+                                             uint64_t seed0, uint64_t seed1),
+                            int (*compare)(const void *a, const void *b, 
+                                           void *udata),
+                            void (*elfree)(void *item),
+                            void *udata);
+void hashmap_free(struct hashmap *map);
+void hashmap_clear(struct hashmap *map, bool update_cap);
+size_t hashmap_count(struct hashmap *map);
+bool hashmap_oom(struct hashmap *map);
+void *hashmap_get(struct hashmap *map, const void *item);
+void *hashmap_set(struct hashmap *map, void *item);
+void *hashmap_delete(struct hashmap *map, void *item);
+void *hashmap_probe(struct hashmap *map, uint64_t position);
+bool hashmap_scan(struct hashmap *map,
+                  bool (*iter)(const void *item, void *udata), void *udata);
+
+uint64_t hashmap_sip(const void *data, size_t len, 
+                     uint64_t seed0, uint64_t seed1);
+uint64_t hashmap_murmur(const void *data, size_t len, 
+                        uint64_t seed0, uint64_t seed1);
+
+
+// DEPRECATED: use `hashmap_new_with_allocator`
+void hashmap_set_allocator(void *(*malloc)(size_t), void (*free)(void*));
+
+#endif