1 files changed, 80 insertions, 0 deletions
diff --git a/lib/nghttp3_idtr.c b/lib/nghttp3_idtr.c
new file mode 100644
index 0000000..dc34841
--- /dev/null
+++ b/lib/nghttp3_idtr.c
@@ -0,0 +1,80 @@
+/*
+ * nghttp3
+ *
+ * Copyright (c) 2019 nghttp3 contributors
+ * 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 "nghttp3_idtr.h"
+
+#include <assert.h>
+
+void nghttp3_idtr_init(nghttp3_idtr *idtr, int server, const nghttp3_mem *mem) {
+  nghttp3_gaptr_init(&idtr->gap, mem);
+
+  idtr->server = server;
+}
+
+void nghttp3_idtr_free(nghttp3_idtr *idtr) {
+  if (idtr == NULL) {
+    return;
+  }
+
+  nghttp3_gaptr_free(&idtr->gap);
+}
+
+/*
+ * id_from_stream_id translates |stream_id| to id space used by
+ * nghttp3_idtr.
+ */
+static uint64_t id_from_stream_id(int64_t stream_id) {
+  return (uint64_t)(stream_id >> 2);
+}
+
+int nghttp3_idtr_open(nghttp3_idtr *idtr, int64_t stream_id) {
+  uint64_t q;
+
+  assert((idtr->server && (stream_id % 2)) ||
+         (!idtr->server && (stream_id % 2)) == 0);
+
+  q = id_from_stream_id(stream_id);
+
+  if (nghttp3_gaptr_is_pushed(&idtr->gap, q, 1)) {
+    return NGHTTP3_ERR_STREAM_IN_USE;
+  }
+
+  return nghttp3_gaptr_push(&idtr->gap, q, 1);
+}
+
+int nghttp3_idtr_is_open(nghttp3_idtr *idtr, int64_t stream_id) {
+  uint64_t q;
+
+  assert((idtr->server && (stream_id % 2)) ||
+         (!idtr->server && (stream_id % 2)) == 0);
+
+  q = id_from_stream_id(stream_id);
+
+  return nghttp3_gaptr_is_pushed(&idtr->gap, q, 1);
+}
+
+uint64_t nghttp3_idtr_first_gap(nghttp3_idtr *idtr) {
+  return nghttp3_gaptr_first_gap_offset(&idtr->gap);
+}