1 files changed, 56 insertions, 0 deletions
diff --git a/lib/ngtcp2_buf.c b/lib/ngtcp2_buf.c
new file mode 100644
index 0000000..75326d6
--- /dev/null
+++ b/lib/ngtcp2_buf.c
@@ -0,0 +1,56 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2017 ngtcp2 contributors
+ *
+ * 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 substantial 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 "ngtcp2_buf.h"
+#include "ngtcp2_mem.h"
+
+void ngtcp2_buf_init(ngtcp2_buf *buf, uint8_t *begin, size_t len) {
+  buf->begin = buf->pos = buf->last = begin;
+  buf->end = begin + len;
+}
+
+void ngtcp2_buf_reset(ngtcp2_buf *buf) { buf->pos = buf->last = buf->begin; }
+
+size_t ngtcp2_buf_cap(const ngtcp2_buf *buf) {
+  return (size_t)(buf->end - buf->begin);
+}
+
+int ngtcp2_buf_chain_new(ngtcp2_buf_chain **pbufchain, size_t len,
+                         const ngtcp2_mem *mem) {
+  *pbufchain = ngtcp2_mem_malloc(mem, sizeof(ngtcp2_buf_chain) + len);
+  if (*pbufchain == NULL) {
+    return NGTCP2_ERR_NOMEM;
+  }
+
+  (*pbufchain)->next = NULL;
+
+  ngtcp2_buf_init(&(*pbufchain)->buf,
+                  (uint8_t *)(*pbufchain) + sizeof(ngtcp2_buf_chain), len);
+
+  return 0;
+}
+
+void ngtcp2_buf_chain_del(ngtcp2_buf_chain *bufchain, const ngtcp2_mem *mem) {
+  ngtcp2_mem_free(mem, bufchain);
+}