Sha256: 21e3a17159f5523617d9f923b1ecc8440097d6783eec7a866f41a47062753b2f
Contents?: true
Size: 1.2 KB
Versions: 6
Compression:
Stored size: 1.2 KB
Contents
module FormatParser::IOUtils
class InvalidRead < ArgumentError
end
class MalformedFile < ArgumentError
end
def safe_read(io, n)
raise ArgumentError, 'Unbounded reads are not supported' if n.nil?
buf = io.read(n)
unless buf
raise InvalidRead, "We wanted to read #{n} bytes from the IO, but the IO is at EOF"
end
if buf.bytesize != n
raise InvalidRead, "We wanted to read #{n} bytes from the IO, but we got #{buf.bytesize} instead"
end
buf
end
def safe_skip(io, n)
raise ArgumentError, 'Unbounded skips are not supported' if n.nil?
return if n == 0
raise InvalidRead, 'Negative skips are not supported' if n < 0
io.seek(io.pos + n)
nil
end
def read_int_8
safe_read(@buf, 1).unpack('C').first
end
def read_int_16
safe_read(@buf, 2).unpack('n').first
end
def read_int_32
safe_read(@buf, 4).unpack('N').first
end
def read_little_endian_int_16
safe_read(@buf, 2).unpack('v').first
end
def read_little_endian_int_32
safe_read(@buf, 4).unpack('V').first
end
# 'n' is the number of bytes to read
def read_string(n)
safe_read(@buf, n)
end
### TODO: Some kind of built-in offset for the read
end
Version data entries
6 entries across 6 versions & 1 rubygems