Sha256: a17d695348387bf31ac407b61368e10d83e5c8371829a6218491b385c6be72a5
Contents?: true
Size: 1.75 KB
Versions: 13
Compression:
Stored size: 1.75 KB
Contents
#!/usr/bin/env ruby -w
# encoding: UTF-8
#
# = FitHeader.rb -- Fit4Ruby - FIT file processing library for Ruby
#
# Copyright (c) 2014, 2015, 2016, 2017, 2018
# by Chris Schlaeger <cs@taskjuggler.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
require 'bindata'
require 'fit4ruby/Log'
require 'fit4ruby/CRC16'
module Fit4Ruby
class FitHeader < BinData::Record
include CRC16
endian :little
uint8 :header_size, :initial_value => 14
uint8 :protocol_version, :initial_value => 32
uint16 :profile_version, :initial_value => 1012
uint32 :data_size, :initial_value => 0
string :data_type, :read_length => 4, :initial_value => '.FIT'
uint16 :crc, :initial_value => 0, :onlyif => :has_crc?
def read(io)
super
unless header_size.snapshot == 12 || header_size.snapshot == 14
Log.fatal "Unsupported header size #{header_size.snapshot}"
end
unless data_type.snapshot == '.FIT'
Log.fatal "Unknown file type #{data_type.snapshot}"
end
if crc.snapshot != 0 &&
compute_crc(io, 0, header_size.snapshot - 2) != crc.snapshot
Log.fatal "CRC mismatch in header."
end
end
def write(io)
super
write_crc(io, 0, header_size.snapshot - 2)
end
def dump
puts <<"EOT"
Fit File Header
Header Size: #{header_size.snapshot}
Protocol Version: #{protocol_version.snapshot}
Profile Version: #{profile_version.snapshot}
Data Size: #{data_size.snapshot}
EOT
end
def has_crc?
header_size.snapshot == 14
end
def end_pos
header_size.snapshot + data_size.snapshot
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems