Sha256: 7af233a0397f22c4ca9855c730025238e4338258aa863eeaf769321a4feb3692
Contents?: true
Size: 1.47 KB
Versions: 14
Compression:
Stored size: 1.47 KB
Contents
module Vectory
class FileMagic
EPS_30_MAGIC = "\x25\x21\x50\x53\x2d\x41\x64\x6f\x62\x65\x2d\x33\x2e\x30" \
"\x20\x45\x50\x53\x46\x2d\x33\x2e\x30"
.force_encoding("BINARY") # "%!PS-Adobe-3.0 EPSF-3.0"
EPS_31_MAGIC = "\x25\x21\x50\x53\x2d\x41\x64\x6f\x62\x65\x2d\x33\x2e\x31" \
"\x20\x45\x50\x53\x46\x2d\x33\x2e\x30"
.force_encoding("BINARY") # "%!PS-Adobe-3.1 EPSF-3.0"
PS_MAGIC = "\x25\x21\x50\x53\x2d\x41\x64\x6f\x62\x65\x2d\x33\x2e\x30"
.force_encoding("BINARY") # "%!PS-Adobe-3.0"
EMF_MAGIC = "\x01\x00\x00\x00".force_encoding("BINARY")
def self.detect(path)
new(path).detect
end
def initialize(path)
@path = path
end
def detect
beginning = File.read(@path, 100, mode: "rb")
eps_slice = beginning.byteslice(0, EPS_30_MAGIC.size)
Vectory.ui.debug("File magic is '#{to_bytes(beginning)}' of '#{@path}'.")
return :eps if [EPS_30_MAGIC, EPS_31_MAGIC].include?(eps_slice)
ps_slice = beginning.byteslice(0, PS_MAGIC.size)
return :ps if ps_slice == PS_MAGIC
emf_slice = beginning.byteslice(0, EMF_MAGIC.size)
return :emf if emf_slice == EMF_MAGIC
return :svg if contain_svg_tag?
end
private
def to_bytes(str)
str.unpack("c*").map { |e| "\\x#{e.to_s(16).rjust(2, '0')}" }.join
end
def contain_svg_tag?
content = File.read(@path, 4096)
return :svg if content.include?("<svg")
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems