From e00953606557cc309f1e8d7c37c36b2a6b31bd5a Mon Sep 17 00:00:00 2001
From: Jordan Bancino <jordan@bancino.net>
Date: Mon, 24 Oct 2022 12:44:29 -0400
Subject: [PATCH] Begin prototyping persistent storage API

---
 src/Db.c         | 104 +++++++++++++++++++++++++++++++++++++++++++++++
 src/include/Db.h |  52 ++++++++++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 src/Db.c
 create mode 100644 src/include/Db.h

diff --git a/src/Db.c b/src/Db.c
new file mode 100644
index 0000000..f8287f8
--- /dev/null
+++ b/src/Db.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2022 Jordan Bancino <@jordan:bancino.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <Db.h>
+
+#include <Memory.h>
+
+#include <pthread.h>
+
+struct Db
+{
+    const char *dir;
+    size_t cacheSize;
+    pthread_mutex_t lock;
+};
+
+struct DbRef
+{
+    pthread_mutex_t lock;
+};
+
+Db *
+DbOpen(const char *dir, size_t cache)
+{
+    Db *db;
+
+    if (!dir)
+    {
+        return NULL;
+    }
+
+    db = Malloc(sizeof(Db));
+    if (!db)
+    {
+        return NULL;
+    }
+
+    db->dir = dir;
+    db->cacheSize = cache;
+
+    pthread_mutex_init(&db->lock, NULL);
+
+    if (db->cacheSize)
+    {
+
+    }
+
+    return db;
+}
+
+void
+DbClose(Db * db)
+{
+    if (!db)
+    {
+        return;
+    }
+
+    Free(db);
+}
+
+DbRef *
+DbCreate(Db * db, char *prefix, char *key)
+{
+    return NULL;
+}
+
+DbRef *
+DbLock(Db * db, char *prefix, char *key)
+{
+    return NULL;
+}
+
+void
+DbUnlock(Db * db, DbRef * ref)
+{
+    return;
+}
+
+HashMap *
+DbJson(DbRef * ref)
+{
+    return NULL;
+}
diff --git a/src/include/Db.h b/src/include/Db.h
new file mode 100644
index 0000000..142c2c4
--- /dev/null
+++ b/src/include/Db.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 Jordan Bancino <@jordan:bancino.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef TELODENDRIA_DB_H
+#define TELODENDRIA_DB_H
+
+#include <stddef.h>
+
+#include <HashMap.h>
+
+typedef struct Db Db;
+typedef struct DbRef DbRef;
+
+extern Db *
+ DbOpen(const char *, size_t);
+
+extern void
+ DbClose(Db *);
+
+extern DbRef *
+ DbCreate(Db *, char *, char *);
+
+extern DbRef *
+ DbLock(Db *, char *, char *);
+
+extern void
+ DbUnlock(Db *, DbRef *);
+
+extern HashMap *
+ DbJson(DbRef *);
+
+#endif