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module MoreCoreExtensions
module StringHexDump
# Dumps the string in a hex editor style format. Options include:
#
# :grouping:: The number of bytes in a line. Default is 16.
# :newline:: Whether or not to add a \n after each line. Default is true.
# :start_pos:: The number at which byte counts will start. Default is 0.
# :obj:: Used in conjunction with _:meth_ to send each line to an object
# instead of returning as a string.
# :meth:: Used in conjunction with _:obj_ to send each line to an object
# instead of returning as a string.
def hex_dump(*opts)
opts = opts[0] if opts.empty? || (opts.length == 1 && opts[0].kind_of?(Hash))
raise ArgumentError, "opts must be a Hash" unless opts.nil? || opts.kind_of?(Hash)
opts = {:grouping => 16, :newline => true, :start_pos => 0}.merge!(opts || {})
obj, meth, grouping, newline, pos = opts.values_at(:obj, :meth, :grouping, :newline, :start_pos)
raise ArgumentError, "obj and meth must both be set, or both not set" if (obj.nil? && !meth.nil?) || (!obj.nil? && meth.nil?)
row_format = "0x%08x #{"%02x " * grouping} "
i = 0
last_i = self.length - 1
ret = ''
row_vals = []
row_chars = ''
self.each_byte do |c|
row_vals << c
row_chars << (c < 0x20 || (c >= 0x7F && c < 0xA0) ? '.' : c.chr)
if (i + 1) % grouping == 0 || i == last_i
row_format = "0x%08x #{"%02x " * row_vals.length}#{" " * (grouping - row_vals.length)} " if i == last_i
row_vals.unshift(pos)
ret << (row_format % row_vals) << row_chars
ret << "\n" if newline
if obj
obj.send(meth, ret)
ret.replace('')
end
pos += grouping
row_vals.clear
row_chars = ''
end
i += 1
end
return ret
end
end
end
String.send(:include, MoreCoreExtensions::StringHexDump)
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10 entries across 10 versions & 1 rubygems