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* lib/shellwords.rb: Embed rdoc style comments.

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* lib/shellwords.rb (shellwords): Use String#lstrip!.

* lib/shellwords.rb (shellwords): Recognize an object that
  responds to to_str() by using String.new().


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3413 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
knu 2003-01-26 10:11:30 +00:00
parent 91758efa95
commit 8b222cea6b
1 changed files with 36 additions and 24 deletions
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60
lib/shellwords.rb
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@ -1,41 +1,52 @@
# shellwords.rb
# original is shellwords.pl
#
# Usage:
# require 'shellwords'
# words = Shellwords.shellwords(line)
# shellwords.rb: Split text into an array of tokens a la UNIX shell
#
# or
#
# require 'shellwords'
# include Shellwords
# words = shellwords(line)
#
# This module is originally a port of shellwords.pl, but modified to
# conform to POSIX / SUSv3 (IEEE Std 1003.1-2001).
#
# Examples:
#
# require 'shellwords'
# words = Shellwords.shellwords(line)
#
# or
#
# require 'shellwords'
# include Shellwords
# words = shellwords(line)
#
module Shellwords
#
# Split text into an array of tokens in the same way the UNIX Bourne
# shell does.
#
# See the +Shellwords+ module documentation for an example.
#
def shellwords(line)
unless line.kind_of?(String)
raise ArgumentError, "Argument must be String class object."
end
line = line.sub(/\A\s+/, '')
line = String.new(line) rescue
raise(ArgumentError, "Argument must be a string")
line.lstrip!
words = []
while line != ''
until line.empty?
field = ''
while true
if line.sub!(/\A"(([^"\\]|\\.)*)"/, '') then #"
snippet = $1
snippet.gsub!(/\\(.)/, '\1')
elsif line =~ /\A"/ then #"
loop do
if line.sub!(/\A"(([^"\\]|\\.)*)"/, '') then
snippet = $1.gsub(/\\(.)/, '\1')
elsif line =~ /\A"/ then
raise ArgumentError, "Unmatched double quote: #{line}"
elsif line.sub!(/\A'([^']*)'/, '') then #'
elsif line.sub!(/\A'([^']*)'/, '') then
snippet = $1
elsif line =~ /\A'/ then #'
elsif line =~ /\A'/ then
raise ArgumentError, "Unmatched single quote: #{line}"
elsif line.sub!(/\A\\(.)/, '') then
snippet = $1
elsif line.sub!(/\A([^\s\\'"]+)/, '') then #'
elsif line.sub!(/\A([^\s\\'"]+)/, '') then
snippet = $1
else
line.sub!(/\A\s+/, '')
line.lstrip!
break
end
field.concat(snippet)
@ -44,5 +55,6 @@ module Shellwords
end
words
end
module_function :shellwords
end