Squashed 'external/toxcore/c-toxcore/' changes from c9cdae001..9ed2fa80d

9ed2fa80d fix(toxav): remove extra copy of video frame on encode
de30cf3ad docs: Add new file kinds, that should be useful to all clients.
d5b5e879d fix(DHT): Correct node skipping logic timed out nodes.
30e71fe97 refactor: Generate event dispatch functions and add tox_events_dispatch.
8fdbb0b50 style: Format parameter lists in event handlers.
d00dee12b refactor: Add warning logs when losing chat invites.
b144e8db1 feat: Add a way to look up a file number by ID.
849281ea0 feat: Add a way to fetch groups by chat ID.
a2c177396 refactor: Harden event system and improve type safety.
8f5caa656 refactor: Add MessagePack string support to bin_pack.
34e8d5ad5 chore: Add GitHub CodeQL workflow and local Docker runner.
f7b068010 refactor: Add nullability annotations to event headers.
788abe651 refactor(toxav): Use system allocator for mutexes.
2e4b423eb refactor: Use specific typedefs for public API arrays.
2baf34775 docs(toxav): update idle iteration interval see 679444751876fa3882a717772918ebdc8f083354
2f87ac67b feat: Add Event Loop abstraction (Ev).
f8dfc38d8 test: Fix data race in ToxScenario virtual_clock.
38313921e test(TCP): Add regression test for TCP priority queue integrity.
f94a50d9a refactor(toxav): Replace mutable_mutex with dynamically allocated mutex.
ad054511e refactor: Internalize DHT structs and add debug helpers.
8b467cc96 fix: Prevent potential integer overflow in group chat handshake.
4962bdbb8 test: Improve TCP simulation and add tests
5f0227093 refactor: Allow nullable data in group chat handlers.
e97b18ea9 chore: Improve Windows Docker support.
b14943bbd refactor: Move Logger out of Messenger into Tox.
dd3136250 cleanup: Apply nullability qualifiers to C++ codebase.
1849f70fc refactor: Extract low-level networking code to net and os_network.
8fec75421 refactor: Delete tox_random, align on rng and os_random.
a03ae8051 refactor: Delete tox_memory, align on mem and os_memory.
4c88fed2c refactor: Use `std::` prefixes more consistently in C++ code.
72452f2ae test: Add some more tests for onion and shared key cache.
d5a51b09a cleanup: Use tox_attributes.h in tox_private.h and install it.
b6f5b9fc5 test: Add some benchmarks for various high level things.
8a8d02785 test(support): Introduce threaded Tox runner and simulation barrier
d68d1d095 perf(toxav): optimize audio and video intermediate buffers by keeping them around
REVERT: c9cdae001 fix(toxav): remove extra copy of video frame on encode

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 9ed2fa80d582c714d6bdde6a7648220a92cddff8

testing/support/public/fuzz_data.hh

@@ -7,6 +7,8 @@
 #include <cstring>
 #include <vector>
 
+#include "../../../toxcore/attributes.h"
+
 namespace tox::test {
 
 struct Fuzz_Data {
@@ -14,12 +16,12 @@ struct Fuzz_Data {
     static constexpr std::size_t TRACE_TRAP = -1;
 
 private:
-    const uint8_t *data_;
-    const uint8_t *base_;
+    const uint8_t *_Nonnull data_;
+    const uint8_t *_Nonnull base_;
     std::size_t size_;
 
 public:
-    Fuzz_Data(const uint8_t *input_data, std::size_t input_size)
+    Fuzz_Data(const uint8_t *_Nonnull input_data, std::size_t input_size)
         : data_(input_data)
         , base_(input_data)
         , size_(input_size)
@@ -30,7 +32,7 @@ public:
     Fuzz_Data(const Fuzz_Data &rhs) = delete;
 
     struct Consumer {
-        const char *func;
+        const char *_Nonnull func;
         Fuzz_Data &fd;
 
         operator bool()
@@ -51,14 +53,14 @@ public:
         {
             if (sizeof(T) > fd.size())
                 return T{};
-            const uint8_t *bytes = fd.consume(func, sizeof(T));
+            const uint8_t *_Nonnull bytes = fd.consume(func, sizeof(T));
             T val;
             std::memcpy(&val, bytes, sizeof(T));
             return val;
         }
     };
 
-    Consumer consume1(const char *func) { return Consumer{func, *this}; }
+    Consumer consume1(const char *_Nonnull func) { return Consumer{func, *this}; }
 
     template <typename T>
     T consume_integral()
@@ -81,7 +83,7 @@ public:
     {
         if (count == 0 || count > size_)
             return {};
-        const uint8_t *start = consume("consume_bytes", count);
+        const uint8_t *_Nullable start = consume("consume_bytes", count);
         if (!start)
             return {};
         return std::vector<uint8_t>(start, start + count);
@@ -92,20 +94,20 @@ public:
         if (empty())
             return {};
         std::size_t count = size();
-        const uint8_t *start = consume("consume_remaining_bytes", count);
+        const uint8_t *_Nonnull start = consume("consume_remaining_bytes", count);
         return std::vector<uint8_t>(start, start + count);
     }
 
     std::size_t size() const { return size_; }
     std::size_t pos() const { return data_ - base_; }
-    const uint8_t *data() const { return data_; }
+    const uint8_t *_Nonnull data() const { return data_; }
     bool empty() const { return size_ == 0; }
 
-    const uint8_t *consume(const char *func, std::size_t count)
+    const uint8_t *_Nullable consume(const char *_Nonnull func, std::size_t count)
     {
         if (count > size_)
             return nullptr;
-        const uint8_t *val = data_;
+        const uint8_t *_Nonnull val = data_;
         if (FUZZ_DEBUG) {
             if (count == 1) {
                 std::printf("consume@%zu(%s): %d (0x%02x)\n", pos(), func, val[0], val[0]);
@@ -170,7 +172,7 @@ struct Fuzz_Target_Selector<> {
 };
 
 template <Fuzz_Target... Args>
-void fuzz_select_target(const uint8_t *data, std::size_t size)
+void fuzz_select_target(const uint8_t *_Nonnull data, std::size_t size)
 {
     Fuzz_Data input{data, size};