Merge remote-tracking branch 'origin/develop' into claude/fix-issue-3989-db7e45

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

tests/src/fuzzer-parse_bjdata.cpp

@@ -51,6 +51,11 @@ Furthermore, it reads data with a SAX parser that recovers from every error
 and checks that the events are balanced, that reading ends, and that it
 reports an error exactly when from_bjdata() fails (see #3989).
 
+Finally, it reads the data from a stream, a non-contiguous iterator range, and
+a FILE*, which read byte by byte, and checks that each gives the same value or
+error (id, message, byte position) as the pointer range, which takes the bulk
+fast paths (see check_input_adapters()).
+
 The provided function `LLVMFuzzerTestOneInput` can be used in different fuzzer
 drivers.
 */
@@ -58,6 +63,19 @@ drivers.
 #include "fuzzer_common.hpp"
 #include "fuzzer-recovering_checker.hpp"
 
+namespace
+{
+// json::from_bjdata for check_input_adapters()
+struct read_bjdata
+{
+    template<typename... Args>
+    json operator()(Args&& ... args) const
+    {
+        return json::from_bjdata(std::forward<Args>(args)...);
+    }
+};
+} // namespace
+
 // value-stable comparison for the round-trip checks below; see the note
 // above on why this compares dump()s rather than the json values directly
 static bool is_value_stable(const json& lhs, const json& rhs)
@@ -139,6 +157,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
         assert(parsed || !recovered_without_errors);
     }
 
+    // step 3: the other input adapters must read the data alike
+    check_input_adapters(data, size, read_bjdata());
+
     // return 0 - non-zero return values are reserved for future use
     return 0;
 }