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Allow access to HCountedArray's elements.

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This commit is contained in:
Jakob Rath 2013-12-15 14:49:12 +01:00 • committed by Dan Hirsch
parent c08818e5a5
commit d53ee07499
1 changed files with 15 additions and 7 deletions
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22
src/bindings/ruby/lib/hammer/internal.rb
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@ -6,6 +6,10 @@ module Hammer
ffi_lib 'libhammer.dylib'
# Maybe we can implement Hammer::Parser with FFI::DataConverter.
# That way, most hammer functions won't need to be wrapped.
# (Probably need to wrap token, sequence and choice only).
# See http://www.elabs.se/blog/61-advanced-topics-in-ruby-ffi
typedef :pointer, :h_parser
HTokenType = enum(:none, 1,
@ -22,11 +26,16 @@ module Hammer
layout :capacity, :size_t,
:used, :size_t,
:arena, :pointer,
:elements, :pointer # TODO
:elements, :pointer # HParsedToken**
def elements
elem_array = FFI::Pointer.new(:pointer, self[:elements])
return (0...self[:used]).map { |i| HParsedToken.new(elem_array[i].read_pointer) }
end
end
class HBytes < FFI::Struct
layout :token, :uint8,
layout :token, :pointer, # uint8_t*
:len, :size_t
end
@ -53,16 +62,15 @@ module Hammer
:arena, :pointer
def self.release(ptr)
p "freeing #{ptr}"
Hammer::Internal.h_parse_result_free(ptr) unless ptr.null?
end
end
# run a parser
attach_function :h_parse, [:h_parser, :string, :size_t], HParseResult.auto_ptr
attach_function :h_parse, [:h_parser, :string, :size_t], HParseResult.auto_ptr # TODO: Use :buffer_in instead of :string?
# build a parser
attach_function :h_token, [:string, :size_t], :h_parser
attach_function :h_token, [:string, :size_t], :h_parser # TODO: Use :buffer_in instead of :string?
attach_function :h_ch, [:uint8], :h_parser
attach_function :h_ch_range, [:uint8, :uint8], :h_parser
attach_function :h_int_range, [:int64, :int64], :h_parser
@ -79,8 +87,8 @@ module Hammer
attach_function :h_left, [:h_parser, :h_parser], :h_parser
attach_function :h_right, [:h_parser, :h_parser], :h_parser
attach_function :h_middle, [:h_parser, :h_parser, :h_parser], :h_parser
#attach_function :h_in, [:string, :size_t], :h_parser
#attach_function :h_not_in, [:string, :size_t], :h_parser
#attach_function :h_in, [:string, :size_t], :h_parser # TODO: Use :buffer_in instead of :string?
#attach_function :h_not_in, [:string, :size_t], :h_parser # TODO: Use :buffer_in instead of :string?
attach_function :h_end_p, [], :h_parser
attach_function :h_nothing_p, [], :h_parser
attach_function :h_sequence, [:varargs], :h_parser