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require 'backports/tools/arguments'
module Backports
# Used internally to combine {IO|File} options hash into mode (String or Integer)
def self.combine_mode_and_option(mode = nil, options = Backports::Undefined)
# Can't backport autoclose, {internal|external|}encoding
mode, options = nil, mode if mode.respond_to?(:to_hash) && options == Backports::Undefined
options = {} if options == nil || options == Backports::Undefined
options = coerce_to_hash(options)
if mode && options[:mode]
raise ArgumentError, "mode specified twice"
end
mode ||= options[:mode] || "r"
mode = try_convert(mode, String, :to_str) || try_convert(mode, Integer, :to_int) || mode
if options[:textmode] || options[:binmode]
text = options[:textmode] || (mode.is_a?(String) && mode =~ /t/)
bin = options[:binmode] || (mode.is_a?(String) ? mode =~ /b/ : mode & File::Constants::BINARY != 0)
if text && bin
raise ArgumentError, "both textmode and binmode specified"
end
case
when !options[:binmode]
when mode.is_a?(String)
mode.insert(1, "b")
else
mode |= File::Constants::BINARY
end
end
mode
end
# Used internally to combine {IO|File} options hash into mode (String or Integer) and perm
def self.combine_mode_perm_and_option(mode = nil, perm = Backports::Undefined, options = Backports::Undefined)
mode, options = nil, mode if mode.respond_to?(:to_hash) && perm == Backports::Undefined
perm, options = nil, perm if perm.respond_to?(:to_hash) && options == Backports::Undefined
perm = nil if perm == Backports::Undefined
options = {} if options == Backports::Undefined
options = coerce_to_hash(options)
if perm && options[:perm]
raise ArgumentError, "perm specified twice"
end
[combine_mode_and_option(mode, options), perm || options[:perm]]
end
def self.write(binary, filename, string, offset, options)
offset, options = nil, offset if offset.respond_to?(:to_hash) && options == Backports::Undefined
options = {} if options == Backports::Undefined
options = coerce_to_hash(options)
File.open(filename, 'a+'){} if offset # insure existence
options = {:mode => offset.nil? ? "w" : "r+"}.merge(options)
args = options[:open_args] || [options]
File.open(filename, *Backports.combine_mode_perm_and_option(*args)) do |f|
f.binmode if binary && f.respond_to?(:binmode)
f.seek(offset) unless offset.nil?
f.write(string)
end
end
end
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