add :unique_key_checking flag to parserlcg/unique_key_checking

can be used to error out if keys are duplicated in input rather than
silently replacing.

2 files changed, 5 insertions, 0 deletions

diff --git a/lib/ffi_yajl/ffi/parser.rb b/lib/ffi_yajl/ffi/parser.rb
index b97b2de..8e4dc07 100644
--- a/lib/ffi_yajl/ffi/parser.rb
+++ b/lib/ffi_yajl/ffi/parser.rb
@@ -30,6 +30,9 @@ module FFI_Yajl
           case stack.last
           when Hash
             raise FFI_Yajl::ParseError.new("internal error: missing key in parse") if key.nil?
+            if @opts[:unique_key_checking] && stack.last.has_key?(key)
+              raise FFI_Yajl::ParseError.new("repeated key: #{key}")
+            end
             stack.last[key] = val
           when Array
             stack.last.push(val)
diff --git a/lib/ffi_yajl/parser.rb b/lib/ffi_yajl/parser.rb
index d8389d7..5b9a0c9 100644
--- a/lib/ffi_yajl/parser.rb
+++ b/lib/ffi_yajl/parser.rb
@@ -75,6 +75,8 @@ module FFI_Yajl
       yajl_opts[:yajl_allow_multiple_values]  = @opts[:allow_multiple_values]
       yajl_opts[:yajl_allow_partial_values]   = @opts[:allow_partial_values]
 
+      yajl_opts[:unique_key_checking]         = @opts[:unique_key_checking]
+
       # XXX: bug-compat with ruby-yajl
       return nil if str == ""