C API: Add BinaryenFunctionAppendVar

Author: mobsceneZ

src/binaryen-c.cpp

@@ -5878,6 +5878,14 @@ BinaryenType BinaryenFunctionGetVar(BinaryenFunctionRef func,
   assert(index < vars.size());
   return vars[index].getID();
 }
+BinaryenIndex BinaryenFunctionAppendVar(BinaryenFunctionRef func,
+                                        BinaryenType type) {
+  auto* function = (Function*)func;
+  auto& list = function->vars;
+  auto index = list.size();
+  list.push_back((Type)type);
+  return index;
+}
 BinaryenIndex BinaryenFunctionGetNumLocals(BinaryenFunctionRef func) {
   return ((Function*)func)->getNumLocals();
 }

src/binaryen-c.h

@@ -3197,6 +3197,10 @@ BINARYEN_API BinaryenIndex BinaryenFunctionGetNumVars(BinaryenFunctionRef func);
 // specified `Function`.
 BINARYEN_API BinaryenType BinaryenFunctionGetVar(BinaryenFunctionRef func,
                                                  BinaryenIndex index);
+// Appends a local variable to the specified `Function`, returning its
+// insertion index.
+BINARYEN_API BinaryenIndex BinaryenFunctionAppendVar(BinaryenFunctionRef func,
+                                                     BinaryenType type);
 // Gets the number of locals within the specified function. Includes parameters.
 BINARYEN_API BinaryenIndex
 BinaryenFunctionGetNumLocals(BinaryenFunctionRef func);