From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../libwebrtc/rtc_base/unique_id_generator.cc      | 72 ++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 third_party/libwebrtc/rtc_base/unique_id_generator.cc

(limited to 'third_party/libwebrtc/rtc_base/unique_id_generator.cc')

diff --git a/third_party/libwebrtc/rtc_base/unique_id_generator.cc b/third_party/libwebrtc/rtc_base/unique_id_generator.cc
new file mode 100644
index 0000000000..e68c643dbe
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/unique_id_generator.cc
@@ -0,0 +1,72 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "rtc_base/unique_id_generator.h"
+
+#include <limits>
+#include <vector>
+
+#include "absl/strings/string_view.h"
+#include "rtc_base/helpers.h"
+#include "rtc_base/string_encode.h"
+#include "rtc_base/string_to_number.h"
+
+namespace rtc {
+
+UniqueRandomIdGenerator::UniqueRandomIdGenerator() : known_ids_() {}
+UniqueRandomIdGenerator::UniqueRandomIdGenerator(ArrayView<uint32_t> known_ids)
+    : known_ids_(known_ids.begin(), known_ids.end()) {}
+
+UniqueRandomIdGenerator::~UniqueRandomIdGenerator() = default;
+
+uint32_t UniqueRandomIdGenerator::GenerateId() {
+  webrtc::MutexLock lock(&mutex_);
+
+  RTC_CHECK_LT(known_ids_.size(), std::numeric_limits<uint32_t>::max() - 1);
+  while (true) {
+    auto pair = known_ids_.insert(CreateRandomNonZeroId());
+    if (pair.second) {
+      return *pair.first;
+    }
+  }
+}
+
+bool UniqueRandomIdGenerator::AddKnownId(uint32_t value) {
+  webrtc::MutexLock lock(&mutex_);
+  return known_ids_.insert(value).second;
+}
+
+UniqueStringGenerator::UniqueStringGenerator() : unique_number_generator_() {}
+UniqueStringGenerator::UniqueStringGenerator(ArrayView<std::string> known_ids) {
+  for (const std::string& str : known_ids) {
+    AddKnownId(str);
+  }
+}
+
+UniqueStringGenerator::~UniqueStringGenerator() = default;
+
+std::string UniqueStringGenerator::GenerateString() {
+  return ToString(unique_number_generator_.GenerateNumber());
+}
+
+bool UniqueStringGenerator::AddKnownId(absl::string_view value) {
+  // TODO(webrtc:13579): remove string copy here once absl::string_view version
+  // of StringToNumber is available.
+  absl::optional<uint32_t> int_value =
+      StringToNumber<uint32_t>(std::string(value));
+  // The underlying generator works for uint32_t values, so if the provided
+  // value is not a uint32_t it will never be generated anyway.
+  if (int_value.has_value()) {
+    return unique_number_generator_.AddKnownId(int_value.value());
+  }
+  return false;
+}
+
+}  // namespace rtc
-- 
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