1 files changed, 131 insertions, 0 deletions
diff --git a/deps/nghttp3/lib/nghttp3_gaptr.c b/deps/nghttp3/lib/nghttp3_gaptr.c
new file mode 100644
index 0000000000..7057cfde2c
--- /dev/null
+++ b/deps/nghttp3/lib/nghttp3_gaptr.c
@@ -0,0 +1,131 @@
+/*
+ * 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_gaptr.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "nghttp3_macro.h"
+
+int nghttp3_gaptr_init(nghttp3_gaptr *gaptr, const nghttp3_mem *mem) {
+  int rv;
+  nghttp3_range range = {0, UINT64_MAX};
+  nghttp3_ksl_key key;
+
+  rv = nghttp3_ksl_init(&gaptr->gap, nghttp3_ksl_range_compar,
+                        sizeof(nghttp3_range), mem);
+  if (rv != 0) {
+    return rv;
+  }
+
+  rv = nghttp3_ksl_insert(&gaptr->gap, NULL, nghttp3_ksl_key_ptr(&key, &range),
+                          NULL);
+  if (rv != 0) {
+    nghttp3_ksl_free(&gaptr->gap);
+    return rv;
+  }
+
+  gaptr->mem = mem;
+
+  return 0;
+}
+
+void nghttp3_gaptr_free(nghttp3_gaptr *gaptr) {
+  if (gaptr == NULL) {
+    return;
+  }
+
+  nghttp3_ksl_free(&gaptr->gap);
+}
+
+int nghttp3_gaptr_push(nghttp3_gaptr *gaptr, uint64_t offset, size_t datalen) {
+  int rv;
+  nghttp3_range k, m, l, r, q = {offset, offset + datalen};
+  nghttp3_ksl_it it;
+  nghttp3_ksl_key key, old_key;
+
+  it =
+      nghttp3_ksl_lower_bound_compar(&gaptr->gap, nghttp3_ksl_key_ptr(&key, &q),
+                                     nghttp3_ksl_range_exclusive_compar);
+
+  for (; !nghttp3_ksl_it_end(&it);) {
+    k = *(nghttp3_range *)nghttp3_ksl_it_key(&it).ptr;
+    m = nghttp3_range_intersect(&q, &k);
+    if (!nghttp3_range_len(&m)) {
+      break;
+    }
+
+    if (nghttp3_range_eq(&k, &m)) {
+      nghttp3_ksl_remove(&gaptr->gap, &it, nghttp3_ksl_key_ptr(&key, &k));
+      continue;
+    }
+    nghttp3_range_cut(&l, &r, &k, &m);
+    if (nghttp3_range_len(&l)) {
+      nghttp3_ksl_update_key(&gaptr->gap, nghttp3_ksl_key_ptr(&old_key, &k),
+                             nghttp3_ksl_key_ptr(&key, &l));
+
+      if (nghttp3_range_len(&r)) {
+        rv = nghttp3_ksl_insert(&gaptr->gap, &it, nghttp3_ksl_key_ptr(&key, &r),
+                                NULL);
+        if (rv != 0) {
+          return rv;
+        }
+      }
+    } else if (nghttp3_range_len(&r)) {
+      nghttp3_ksl_update_key(&gaptr->gap, nghttp3_ksl_key_ptr(&old_key, &k),
+                             nghttp3_ksl_key_ptr(&key, &r));
+    }
+    nghttp3_ksl_it_next(&it);
+  }
+  return 0;
+}
+
+uint64_t nghttp3_gaptr_first_gap_offset(nghttp3_gaptr *gaptr) {
+  nghttp3_ksl_it it = nghttp3_ksl_begin(&gaptr->gap);
+  nghttp3_range r = *(nghttp3_range *)nghttp3_ksl_it_key(&it).ptr;
+  return r.begin;
+}
+
+nghttp3_ksl_it nghttp3_gaptr_get_first_gap_after(nghttp3_gaptr *gaptr,
+                                                 uint64_t offset) {
+  nghttp3_range q = {offset, offset + 1};
+  nghttp3_ksl_key key;
+  return nghttp3_ksl_lower_bound_compar(&gaptr->gap,
+                                        nghttp3_ksl_key_ptr(&key, &q),
+                                        nghttp3_ksl_range_exclusive_compar);
+}
+
+int nghttp3_gaptr_is_pushed(nghttp3_gaptr *gaptr, uint64_t offset,
+                            size_t datalen) {
+  nghttp3_ksl_key key;
+  nghttp3_range q = {offset, offset + datalen};
+  nghttp3_ksl_it it =
+      nghttp3_ksl_lower_bound_compar(&gaptr->gap, nghttp3_ksl_key_ptr(&key, &q),
+                                     nghttp3_ksl_range_exclusive_compar);
+  nghttp3_range k = *(nghttp3_range *)nghttp3_ksl_it_key(&it).ptr;
+  nghttp3_range m = nghttp3_range_intersect(&q, &k);
+  return nghttp3_range_len(&m) == 0;
+}