deps: add nghttp2 dependency

PR-URL: https://github.com/nodejs/node/pull/14239
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/deps/nghttp2/lib/nghttp2_queue.c b/deps/nghttp2/lib/nghttp2_queue.c
new file mode 100644
index 0000000000..055eb69c7e
--- /dev/null
+++ b/deps/nghttp2/lib/nghttp2_queue.c
@@ -0,0 +1,85 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * 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 "nghttp2_queue.h"
+
+#include <string.h>
+#include <assert.h>
+
+void nghttp2_queue_init(nghttp2_queue *queue) {
+  queue->front = queue->back = NULL;
+}
+
+void nghttp2_queue_free(nghttp2_queue *queue) {
+  if (!queue) {
+    return;
+  } else {
+    nghttp2_queue_cell *p = queue->front;
+    while (p) {
+      nghttp2_queue_cell *next = p->next;
+      free(p);
+      p = next;
+    }
+  }
+}
+
+int nghttp2_queue_push(nghttp2_queue *queue, void *data) {
+  nghttp2_queue_cell *new_cell =
+      (nghttp2_queue_cell *)malloc(sizeof(nghttp2_queue_cell));
+  if (!new_cell) {
+    return NGHTTP2_ERR_NOMEM;
+  }
+  new_cell->data = data;
+  new_cell->next = NULL;
+  if (queue->back) {
+    queue->back->next = new_cell;
+    queue->back = new_cell;
+
+  } else {
+    queue->front = queue->back = new_cell;
+  }
+  return 0;
+}
+
+void nghttp2_queue_pop(nghttp2_queue *queue) {
+  nghttp2_queue_cell *front = queue->front;
+  assert(front);
+  queue->front = front->next;
+  if (front == queue->back) {
+    queue->back = NULL;
+  }
+  free(front);
+}
+
+void *nghttp2_queue_front(nghttp2_queue *queue) {
+  assert(queue->front);
+  return queue->front->data;
+}
+
+void *nghttp2_queue_back(nghttp2_queue *queue) {
+  assert(queue->back);
+  return queue->back->data;
+}
+
+int nghttp2_queue_empty(nghttp2_queue *queue) { return queue->front == NULL; }