Updating to reflect the latest work.

[zilutils.git] / zilasm / zmem.c

diff --git a/zilasm/zmem.c b/zilasm/zmem.c
new file mode 100644 (file)
index 0000000..b67e3c2
--- /dev/null
+++ b/zilasm/zmem.c
@@ -0,0 +1,47 @@
+/*
+ * zmem.c -- part of ZilUtils/ZilAsm
+ *
+ * Copyright (C) 2016 Jason Self <j@jxself.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+#include <assert.h>
+#include <strings.h>  /* bzero */
+#include <stdlib.h>   /* malloc, free */
+
+#include "zmem.h"
+
+ZMemblock* zmem_init(unsigned maxsize)
+{
+       ZMemblock *zmb = malloc(sizeof(ZMemblock) + maxsize - 1);
+       assert(zmb);
+       zmb->allocated_size = maxsize;
+       zmb->used_size = 0;
+       bzero(&zmb->contents, maxsize);
+       return zmb;
+}
+
+void zmem_destroy(ZMemblock *zmb)
+{
+       assert(zmb);
+       free(zmb);
+}
+
+void zmem_putbyte(ZMemblock *zmb, unsigned char val)
+{
+       assert(zmb);
+       assert(zmb->used_size < zmb->allocated_size);
+       zmb->contents[zmb->used_size++] = val;
+}