third_party/protobuf: Update to HEAD (83d681ee2c)

third_party/protobuf/php/ext/google/protobuf/utf8.c

Index: third_party/protobuf/php/ext/google/protobuf/utf8.c
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/PartialClasses.cs b/third_party/protobuf/php/ext/google/protobuf/utf8.c
similarity index 56%
copy from third_party/protobuf/csharp/src/Google.Protobuf/Reflection/PartialClasses.cs
copy to third_party/protobuf/php/ext/google/protobuf/utf8.c
index 6c285410d4b40873a2386367cd54621cf1e1c23a..2752a08b05937e6b1f504c4b6855b47deb7bf766 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/PartialClasses.cs
+++ b/third_party/protobuf/php/ext/google/protobuf/utf8.c
@@ -1,4 +1,3 @@
-#region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
@@ -28,32 +27,42 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#endregion
 
-// This file just contains partial classes for any autogenerated classes that need additional support.
-namespace Google.Protobuf.Reflection
-{
-    internal partial class FieldDescriptorProto
-    {
-        // We can't tell the difference between "explicitly set to 0" and "not set"
-        // in proto3, but we need to tell the difference for OneofIndex. descriptor.proto
-        // is really a proto2 file, but the runtime doesn't know about proto2 semantics...
-        // We fake it by defaulting to -1.
-        partial void OnConstruction()
-        {
-            OneofIndex = -1;
-        }
-    }
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "utf8.h"
+
+static const uint8_t utf8_offset[] = {
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+    4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0, 0, 0,
+};
 
-    internal partial class FieldOptions
-    {
-        // We can't tell the difference between "explicitly set to false" and "not set"
-        // in proto3, but we need to tell the difference for FieldDescriptor.IsPacked.
-        // This won't work if we ever need to support proto2, but at that point we'll be
-        // able to remove this hack and use field presence instead. 
-        partial void OnConstruction()
-        {
-            Packed = true;
-        }
+bool is_structurally_valid_utf8(const char* buf, int len) {
+  int i, j;
+  uint8_t offset;
+
+  i = 0;
+  while (i < len) {
+    offset = utf8_offset[(uint8_t)buf[i]];
+    if (offset == 0 || i + offset > len) {
+      return false;
+    }
+    for (j = i + 1; j < i + offset; j++) {
+      if ((buf[j] & 0xc0) != 0x80) {
+        return false;
+      }
     }
-}
+    i += offset;
+  }
+  return i == len;
+}