1 files changed, 19 insertions, 0 deletions
diff --git a/2.27.1/src/json/json_name.rs b/2.27.1/src/json/json_name.rs
new file mode 100644
index 0000000..f5c9364
--- /dev/null
+++ b/2.27.1/src/json/json_name.rs
@@ -0,0 +1,19 @@
+/// Implementation must match exactly
+/// `ToJsonName()` function in C++ `descriptor.cc`.
+pub fn json_name(input: &str) -> String {
+    let mut capitalize_next = false;
+    let mut result = String::with_capacity(input.len());
+
+    for c in input.chars() {
+        if c == '_' {
+            capitalize_next = true;
+        } else if capitalize_next {
+            result.extend(c.to_uppercase());
+            capitalize_next = false;
+        } else {
+            result.push(c);
+        }
+    }
+
+    result
+}