Module: FFI_Yajl::FFI::Parser
- Included in:
- Parser
- Defined in:
- lib/ffi_yajl/ffi/parser.rb
Instance Attribute Summary collapse
-
#finished ⇒ Object
Returns the value of attribute finished.
-
#key ⇒ Object
Returns the value of attribute key.
-
#key_stack ⇒ Object
stack to keep track of keys as we create nested hashes.
-
#stack ⇒ Object
stack used to build up our complex object.
Instance Method Summary collapse
- #do_yajl_parse(str, opts = {}) ⇒ Object
- #key_pop ⇒ Object
- #key_push ⇒ Object
- #set_value(val) ⇒ Object
- #setup_callbacks ⇒ Object
- #stack_pop ⇒ Object
Instance Attribute Details
#finished ⇒ Object
Returns the value of attribute finished.
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# File 'lib/ffi_yajl/ffi/parser.rb', line 7 def finished @finished end |
#key ⇒ Object
Returns the value of attribute key.
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# File 'lib/ffi_yajl/ffi/parser.rb', line 7 def key @key end |
#key_stack ⇒ Object
stack to keep track of keys as we create nested hashes
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# File 'lib/ffi_yajl/ffi/parser.rb', line 39 def key_stack @key_stack end |
#stack ⇒ Object
stack used to build up our complex object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 12 def stack @stack end |
Instance Method Details
#do_yajl_parse(str, opts = {}) ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 112 def do_yajl_parse(str, opts = {}) setup_callbacks callback_ptr = ::FFI::MemoryPointer.new(::FFI_Yajl::YajlCallbacks) callbacks = ::FFI_Yajl::YajlCallbacks.new(callback_ptr) callbacks[:yajl_null] = @null_callback callbacks[:yajl_boolean] = @boolean_callback callbacks[:yajl_integer] = @integer_callback callbacks[:yajl_double] = @double_callback callbacks[:yajl_number] = @number_callback callbacks[:yajl_string] = @string_callback callbacks[:yajl_start_map] = @start_map_callback callbacks[:yajl_map_key] = @map_key_callback callbacks[:yajl_end_map] = @end_map_callback callbacks[:yajl_start_array] = @start_array_callback callbacks[:yajl_end_array] = @end_array_callback yajl_handle = ::FFI_Yajl.yajl_alloc(callback_ptr, nil, nil) if ( stat = ::FFI_Yajl.yajl_parse(yajl_handle, str, str.bytesize) != :yajl_status_ok ) # FIXME: dup the error and call yajl_free_error? error = ::FFI_Yajl.yajl_get_error(yajl_handle, 1, str, str.bytesize) raise ::FFI_Yajl::ParseError.new(error) end if ( stat = FFI_Yajl.yajl_complete_parse(yajl_handle) != :yajl_status_ok ) # FIXME: dup the error and call yajl_free_error? error = ::FFI_Yajl.yajl_get_error(yajl_handle, 1, str, str.bytesize) raise ::FFI_Yajl::ParseError.new(error) end finished ensure ::FFI_Yajl.yajl_free(yajl_handle) if yajl_handle end |
#key_pop ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 47 def key_pop @key = key_stack.pop() end |
#key_push ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 43 def key_push key_stack.push(key) end |
#set_value(val) ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 16 def set_value(val) case stack.last when Hash raise FFI_Yajl::ParseError.new("internal error: missing key in parse") if key.nil? stack.last[key] = val when Array stack.last.push(val) else raise FFI_Yajl::ParseError.new("internal error: object not a hash or array") end end |
#setup_callbacks ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 52 def setup_callbacks @null_callback = ::FFI::Function.new(:int, [:pointer]) do |ctx| set_value(nil) 1 end @boolean_callback = ::FFI::Function.new(:int, [:pointer, :int]) do |ctx, boolval| set_value(boolval == 1 ? true : false) 1 end @integer_callback = ::FFI::Function.new(:int, [:pointer, :long_long]) do |ctx, intval| set_value(intval) 1 end @number_callback = ::FFI::Function.new(:int, [:pointer, :string, :size_t ]) do |ctx, stringval, stringlen| s = stringval.slice(0,stringlen) s.force_encoding('UTF-8') if defined? Encoding # XXX: I can't think of a better way to do this right now. need to call to_f if and only if its a float. v = ( s =~ /\./ ) ? s.to_f : s.to_i set_value(v) 1 end @double_callback = ::FFI::Function.new(:int, [:pointer, :double]) do |ctx, doubleval| set_value(doubleval) 1 end @string_callback = ::FFI::Function.new(:int, [:pointer, :string, :size_t]) do |ctx, stringval, stringlen| s = stringval.slice(0,stringlen) s.force_encoding('UTF-8') if defined? Encoding set_value(s) 1 end @start_map_callback = ::FFI::Function.new(:int, [:pointer]) do |ctx| key_push # for key => { } case, save the key stack.push(Hash.new) 1 end @map_key_callback = ::FFI::Function.new(:int, [:pointer, :string, :size_t]) do |ctx, key, keylen| s = key.slice(0,keylen) s.force_encoding('UTF-8') if defined? Encoding self.key = s 1 end @end_map_callback = ::FFI::Function.new(:int, [:pointer]) do |ctx| key_pop stack_pop 1 end @start_array_callback = ::FFI::Function.new(:int, [:pointer]) do |ctx| key_push # for key => [ ] case, save the key stack.push(Array.new) 1 end @end_array_callback = ::FFI::Function.new(:int, [:pointer]) do |ctx| key_pop stack_pop 1 end end |
#stack_pop ⇒ Object
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# File 'lib/ffi_yajl/ffi/parser.rb', line 28 def stack_pop if stack.length > 1 set_value( stack.pop ) else @finished = stack.pop end end |