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Diffstat (limited to 'vendor/thrift/protocol/compact_protocol.rb')
| -rw-r--r-- | vendor/thrift/protocol/compact_protocol.rb | 426 |
1 files changed, 0 insertions, 426 deletions
diff --git a/vendor/thrift/protocol/compact_protocol.rb b/vendor/thrift/protocol/compact_protocol.rb deleted file mode 100644 index ede82f2..0000000 --- a/vendor/thrift/protocol/compact_protocol.rb +++ /dev/null @@ -1,426 +0,0 @@ -# -# Licensed to the Apache Software Foundation (ASF) under one -# or more contributor license agreements. See the NOTICE file -# distributed with this work for additional information -# regarding copyright ownership. The ASF licenses this file -# to you under the Apache License, Version 2.0 (the -# "License"); you may not use this file except in compliance -# with the License. You may obtain a copy of the License at -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, -# software distributed under the License is distributed on an -# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY -# KIND, either express or implied. See the License for the -# specific language governing permissions and limitations -# under the License. -# - -module Thrift - class CompactProtocol < BaseProtocol - - PROTOCOL_ID = [0x82].pack('c').unpack('c').first - VERSION = 1 - VERSION_MASK = 0x1f - TYPE_MASK = 0xE0 - TYPE_SHIFT_AMOUNT = 5 - - TSTOP = ["", Types::STOP, 0] - - # - # All of the on-wire type codes. - # - class CompactTypes - BOOLEAN_TRUE = 0x01 - BOOLEAN_FALSE = 0x02 - BYTE = 0x03 - I16 = 0x04 - I32 = 0x05 - I64 = 0x06 - DOUBLE = 0x07 - BINARY = 0x08 - LIST = 0x09 - SET = 0x0A - MAP = 0x0B - STRUCT = 0x0C - - def self.is_bool_type?(b) - (b & 0x0f) == BOOLEAN_TRUE || (b & 0x0f) == BOOLEAN_FALSE - end - - COMPACT_TO_TTYPE = { - Types::STOP => Types::STOP, - BOOLEAN_FALSE => Types::BOOL, - BOOLEAN_TRUE => Types::BOOL, - BYTE => Types::BYTE, - I16 => Types::I16, - I32 => Types::I32, - I64 => Types::I64, - DOUBLE => Types::DOUBLE, - BINARY => Types::STRING, - LIST => Types::LIST, - SET => Types::SET, - MAP => Types::MAP, - STRUCT => Types::STRUCT - } - - TTYPE_TO_COMPACT = { - Types::STOP => Types::STOP, - Types::BOOL => BOOLEAN_TRUE, - Types::BYTE => BYTE, - Types::I16 => I16, - Types::I32 => I32, - Types::I64 => I64, - Types::DOUBLE => DOUBLE, - Types::STRING => BINARY, - Types::LIST => LIST, - Types::SET => SET, - Types::MAP => MAP, - Types::STRUCT => STRUCT - } - - def self.get_ttype(compact_type) - val = COMPACT_TO_TTYPE[compact_type & 0x0f] - raise "don't know what type: #{compact_type & 0x0f}" unless val - val - end - - def self.get_compact_type(ttype) - val = TTYPE_TO_COMPACT[ttype] - raise "don't know what type: #{ttype & 0x0f}" unless val - val - end - end - - def initialize(transport) - super(transport) - - @last_field = [0] - @boolean_value = nil - - # Pre-allocated read buffer for read_double(). - @rbuf = "\0" * 8 - @rbuf.force_encoding("BINARY") if @rbuf.respond_to?(:force_encoding) - end - - def write_message_begin(name, type, seqid) - write_byte(PROTOCOL_ID) - write_byte((VERSION & VERSION_MASK) | ((type << TYPE_SHIFT_AMOUNT) & TYPE_MASK)) - write_varint32(seqid) - write_string(name) - nil - end - - def write_struct_begin(name) - @last_field.push(0) - nil - end - - def write_struct_end - @last_field.pop - nil - end - - def write_field_begin(name, type, id) - if type == Types::BOOL - # we want to possibly include the value, so we'll wait. - @boolean_field = [type, id] - else - write_field_begin_internal(type, id) - end - nil - end - - # - # The workhorse of writeFieldBegin. It has the option of doing a - # 'type override' of the type header. This is used specifically in the - # boolean field case. - # - def write_field_begin_internal(type, id, type_override=nil) - last_id = @last_field.pop - - # if there's a type override, use that. - typeToWrite = type_override || CompactTypes.get_compact_type(type) - - # check if we can use delta encoding for the field id - if id > last_id && id - last_id <= 15 - # write them together - write_byte((id - last_id) << 4 | typeToWrite) - else - # write them separate - write_byte(typeToWrite) - write_i16(id) - end - - @last_field.push(id) - nil - end - - def write_field_stop - write_byte(Types::STOP) - end - - def write_map_begin(ktype, vtype, size) - if (size == 0) - write_byte(0) - else - write_varint32(size) - write_byte(CompactTypes.get_compact_type(ktype) << 4 | CompactTypes.get_compact_type(vtype)) - end - end - - def write_list_begin(etype, size) - write_collection_begin(etype, size) - end - - def write_set_begin(etype, size) - write_collection_begin(etype, size); - end - - def write_bool(bool) - type = bool ? CompactTypes::BOOLEAN_TRUE : CompactTypes::BOOLEAN_FALSE - unless @boolean_field.nil? - # we haven't written the field header yet - write_field_begin_internal(@boolean_field.first, @boolean_field.last, type) - @boolean_field = nil - else - # we're not part of a field, so just write the value. - write_byte(type) - end - end - - def write_byte(byte) - @trans.write([byte].pack('c')) - end - - def write_i16(i16) - write_varint32(int_to_zig_zag(i16)) - end - - def write_i32(i32) - write_varint32(int_to_zig_zag(i32)) - end - - def write_i64(i64) - write_varint64(long_to_zig_zag(i64)) - end - - def write_double(dub) - @trans.write([dub].pack("G").reverse) - end - - def write_string(str) - write_varint32(str.length) - @trans.write(str) - end - - def read_message_begin - protocol_id = read_byte() - if protocol_id != PROTOCOL_ID - raise ProtocolException.new("Expected protocol id #{PROTOCOL_ID} but got #{protocol_id}") - end - - version_and_type = read_byte() - version = version_and_type & VERSION_MASK - if (version != VERSION) - raise ProtocolException.new("Expected version #{VERSION} but got #{version}"); - end - - type = (version_and_type >> TYPE_SHIFT_AMOUNT) & 0x03 - seqid = read_varint32() - messageName = read_string() - [messageName, type, seqid] - end - - def read_struct_begin - @last_field.push(0) - "" - end - - def read_struct_end - @last_field.pop() - nil - end - - def read_field_begin - type = read_byte() - - # if it's a stop, then we can return immediately, as the struct is over. - if (type & 0x0f) == Types::STOP - TSTOP - else - field_id = nil - - # mask off the 4 MSB of the type header. it could contain a field id delta. - modifier = (type & 0xf0) >> 4 - if modifier == 0 - # not a delta. look ahead for the zigzag varint field id. - @last_field.pop - field_id = read_i16() - else - # has a delta. add the delta to the last read field id. - field_id = @last_field.pop + modifier - end - - # if this happens to be a boolean field, the value is encoded in the type - if CompactTypes.is_bool_type?(type) - # save the boolean value in a special instance variable. - @bool_value = (type & 0x0f) == CompactTypes::BOOLEAN_TRUE - end - - # push the new field onto the field stack so we can keep the deltas going. - @last_field.push(field_id) - ["", CompactTypes.get_ttype(type & 0x0f), field_id] - end - end - - def read_map_begin - size = read_varint32() - key_and_value_type = size == 0 ? 0 : read_byte() - [CompactTypes.get_ttype(key_and_value_type >> 4), CompactTypes.get_ttype(key_and_value_type & 0xf), size] - end - - def read_list_begin - size_and_type = read_byte() - size = (size_and_type >> 4) & 0x0f - if size == 15 - size = read_varint32() - end - type = CompactTypes.get_ttype(size_and_type) - [type, size] - end - - def read_set_begin - read_list_begin - end - - def read_bool - unless @bool_value.nil? - bv = @bool_value - @bool_value = nil - bv - else - read_byte() == CompactTypes::BOOLEAN_TRUE - end - end - - def read_byte - val = trans.read_byte - if (val > 0x7f) - val = 0 - ((val - 1) ^ 0xff) - end - val - end - - def read_i16 - zig_zag_to_int(read_varint32()) - end - - def read_i32 - zig_zag_to_int(read_varint32()) - end - - def read_i64 - zig_zag_to_long(read_varint64()) - end - - def read_double - trans.read_into_buffer(@rbuf, 8) - val = @rbuf.reverse.unpack('G').first - val - end - - def read_string - size = read_varint32() - trans.read_all(size) - end - - - private - - # - # Abstract method for writing the start of lists and sets. List and sets on - # the wire differ only by the type indicator. - # - def write_collection_begin(elem_type, size) - if size <= 14 - write_byte(size << 4 | CompactTypes.get_compact_type(elem_type)) - else - write_byte(0xf0 | CompactTypes.get_compact_type(elem_type)) - write_varint32(size) - end - end - - def write_varint32(n) - # int idx = 0; - while true - if (n & ~0x7F) == 0 - # i32buf[idx++] = (byte)n; - write_byte(n) - break - # return; - else - # i32buf[idx++] = (byte)((n & 0x7F) | 0x80); - write_byte((n & 0x7F) | 0x80) - n = n >> 7 - end - end - # trans_.write(i32buf, 0, idx); - end - - SEVEN_BIT_MASK = 0x7F - EVERYTHING_ELSE_MASK = ~SEVEN_BIT_MASK - - def write_varint64(n) - while true - if (n & EVERYTHING_ELSE_MASK) == 0 #TODO need to find a way to make this into a long... - write_byte(n) - break - else - write_byte((n & SEVEN_BIT_MASK) | 0x80) - n >>= 7 - end - end - end - - def read_varint32() - read_varint64() - end - - def read_varint64() - shift = 0 - result = 0 - while true - b = read_byte() - result |= (b & 0x7f) << shift - break if (b & 0x80) != 0x80 - shift += 7 - end - result - end - - def int_to_zig_zag(n) - (n << 1) ^ (n >> 31) - end - - def long_to_zig_zag(l) - # puts "zz encoded #{l} to #{(l << 1) ^ (l >> 63)}" - (l << 1) ^ (l >> 63) - end - - def zig_zag_to_int(n) - (n >> 1) ^ -(n & 1) - end - - def zig_zag_to_long(n) - (n >> 1) ^ -(n & 1) - end - end - - class CompactProtocolFactory < BaseProtocolFactory - def get_protocol(trans) - CompactProtocol.new(trans) - end - end -end |