Lcg/parser bugs

CHANGELOG.md

@@ -17,6 +17,9 @@
 
 ### Bugs fixed
 
+* fixes bare object parsing in issue #2 and #6
+* fixes parsing nil object to not coredump the MRI ruby VM (issue #15)
+
 ## 1.2.0 (10/09/2014)
 
 ### Changes

ext/ffi_yajl/ext/parser/parser.c

@@ -26,6 +26,7 @@ void set_value(CTX *ctx, VALUE val) {
       rb_hash_aset(last, key, val);
       break;
     default:
+      rb_ary_push(stack, val);
       break;
   }
 }
@@ -49,8 +50,6 @@ void end_object(CTX *ctx) {
   rb_ivar_set(ctx->self, rb_intern("key"), rb_ary_pop(key_stack));
   if ( RARRAY_LEN(stack) > 1 ) {
     set_value(ctx, rb_ary_pop(stack));
-  } else {
-    rb_ivar_set(ctx->self, rb_intern("finished"), rb_ary_pop(stack));
   }
 }
 
@@ -211,7 +210,7 @@ static VALUE mParser_do_yajl_parse(VALUE self, VALUE str, VALUE yajl_opts) {
     goto raise;
   }
   yajl_free(hand);
-  return rb_ivar_get(self, rb_intern("finished"));
+  return rb_ary_pop(rb_ivar_get(self, rb_intern("stack")));
 
 raise:
   if (hand) {
@@ -230,4 +229,3 @@ void Init_parser() {
   utf8Encoding = rb_utf8_encoding();
 #endif
 }
-

lib/ffi_yajl/ffi/parser.rb

@@ -13,15 +13,13 @@ def set_value(val)
           when Array
             stack.last.push(val)
           else
-            raise FFI_Yajl::ParseError.new("internal error: object not a hash or array")
+            stack.push(val)
           end
         end
 
         def stack_pop
           if stack.length > 1
             set_value( stack.pop )
-          else
-            @finished = stack.pop
           end
         end
 
@@ -138,11 +136,10 @@ def do_yajl_parse(str, yajl_opts = {})
           error = ::FFI_Yajl.yajl_get_error(yajl_handle, 1, str, str.bytesize)
           raise ::FFI_Yajl::ParseError.new(error)
         end
-        finished
+        stack.pop
       ensure
         ::FFI_Yajl.yajl_free(yajl_handle) if yajl_handle
       end
     end
   end
 end
-

lib/ffi_yajl/parser.rb

@@ -31,6 +31,8 @@ def initialize(opts = {})
     end
 
     def parse(str)
+      raise FFI_Yajl::ParseError, "input must be a string or IO" unless str.is_a?(String) || str.respond_to?(:read)
+
       # initialization that we can do in pure ruby
       yajl_opts = {}
 

spec/ffi_yajl/parser_spec.rb

@@ -14,6 +14,55 @@
       end
     end
 
+    context "when parsing nil" do
+      let(:json) { nil }
+      it "should not coredump ruby" do
+        expect{ parser }.to raise_error(FFI_Yajl::ParseError)
+      end
+    end
+
+    context "when parsing bare int" do
+      let(:json) { "1" }
+      it "should parse to the int value" do
+        expect( parser ).to eq(1)
+      end
+    end
+
+    context "when parsing bare string" do
+      let(:json) { '"a"' }
+      it "should parse to the string value" do
+        expect( parser ).to eq("a")
+      end
+    end
+
+    context "when parsing bare true" do
+      let(:json) { "true" }
+      it "should parse to the true value" do
+        expect( parser ).to eq(true)
+      end
+    end
+
+    context "when parsing bare false" do
+      let(:json) { "false" }
+      it "should parse to the false value" do
+        expect( parser ).to eq(false)
+      end
+    end
+
+    context "when parsing bare null" do
+      let(:json) { "null" }
+      it "should parse to the nil value" do
+        expect( parser ).to eq(nil)
+      end
+    end
+
+    context "when parsing bare float" do
+      let(:json) { "1.1" }
+      it "should parse to the a float" do
+        expect( parser ).to eq(1.1)
+      end
+    end
+
     context "when json has comments" do
       let(:json) { '{"key": /* this is a comment */ "value"}' }
 
@@ -482,4 +531,3 @@
     end
   end
 end
-