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962 lines
19 KiB
Ruby
962 lines
19 KiB
Ruby
#!/usr/local/bin/ruby
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#
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# rbc.rb -
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# $Release Version: 0.6 $
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# $Revision: 1.2 $
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# $Date: 1997/11/27 13:46:06 $
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# by Keiju ISHITSUKA(Nippon Rational Inc.)
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#
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# --
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# Usage:
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#
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# rbc.rb [options] file_name opts
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# options:
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# -d デバッグモード(利用しない方が良いでしょう)
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# -m bcモード(分数, 行列の計算ができます)
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# -r load-module ruby -r と同じ
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# --inspect 結果出力にinspectを用いる(bcモード以外はデ
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# フォルト).
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# --noinspect 結果出力にinspectを用いない.
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# --noreadline readlineライブラリを利用しない(デフォルト
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# ではreadlineライブラリを利用しようとする).
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#
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# 追加 private method:
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# exit, quit 終了する.
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# inspect(sw = nil) インスペクトモードのトグル
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# trace_load(sw = nil) load/require時にrbcのfile読み込み機能を用
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# いるモードのスイッチ(デフォルトはトレース
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# モード)
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#
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require "e2mmap.rb"
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$stdout.sync = TRUE
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module BC_APPLICATION__
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RCS_ID='-$Header: /home/keiju/var/src/var.lib/ruby/ruby/RCS/rbc.rb,v 1.2 1997/11/27 13:46:06 keiju Exp keiju $-'
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extend Exception2MessageMapper
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def_exception :UnrecognizedSwitch, "Unrecognized switch: %s"
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$DEBUG = FALSE
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$INSPECT = nil
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CONFIG = {}
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CONFIG[0] = $0
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CONFIG[:USE_READLINE] = TRUE
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CONFIG[:LOAD_MODULES] = []
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CONFIG[:INSPECT] = nil
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CONFIG[:TRACE_LOAD] = TRUE
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while opt = ARGV.shift
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case opt
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when "-d"
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$DEBUG = TRUE
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when "-m"
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CONFIG[:INSPECT] = FALSE if CONFIG[:INSPECT].nil?
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require "mathn.rb"
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include Math
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when "-r"
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opt = ARGV.shift
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CONFIG[:LOAD_MODULES].push opt if opt
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when "--inspect"
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CONFIG[:INSPECT] = TRUE
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when "--noinspect"
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CONFIG[:INSPECT] = FALSE
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when "--noreadline"
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CONFIG[:USE_READLINE] = FALSE
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when /^-/
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# print UnrecognizedSwitch.inspect, "\n"
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BC.fail UnrecognizedSwitch, opt
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else
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CONFIG[:USE_READLINE] = FALSE
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$0 = opt
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break
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end
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end
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CONFIG[:INSPECT] = TRUE if CONFIG[:INSPECT].nil?
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PROMPTi = "rbc%d> "
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PROMPTs = "rbc%d%s "
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PROMPTe = "rbc%d* "
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class BC
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def initialize
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lex_init
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end
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def eval_input(io, cont, bind)
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line = ''
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@io = io
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@ltype = nil
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@quoted = nil
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@indent = 0
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@lex_state = EXPR_BEG
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@io.prompt = format(PROMPTi, @indent)
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loop do
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@continue = FALSE
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l = @io.gets
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unless l
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break if line == ''
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else
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line = line + l
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lex(l) if l != "\n"
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print @quoted.inspect, "\n" if $DEBUG
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if @ltype
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@io.prompt = format(PROMPTs, @indent, @ltype)
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next
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elsif @continue
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@io.prompt = format(PROMPTe, @indent)
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next
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elsif @indent > 0
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@io.prompt = format(PROMPTi, @indent)
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next
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end
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end
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if line != "\n"
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begin
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if CONFIG[:INSPECT]
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print (cont._=eval(line, bind)).inspect, "\n"
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else
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print (cont._=eval(line, bind)), "\n"
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end
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rescue
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# $! = 'exception raised' unless $!
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# print "ERR: ", $!, "\n"
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$! = RuntimeError.new("exception raised") unless $!
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print $!.type, ": ", $!, "\n"
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end
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end
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break if not l
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line = ''
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indent = 0
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@io.prompt = format(PROMPTi, indent)
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end
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print "\n"
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end
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EXPR_BEG = :EXPR_BEG
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EXPR_MID = :EXPR_MID
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EXPR_END = :EXPR_END
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EXPR_ARG = :EXPR_ARG
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EXPR_FNAME = :EXPR_FNAME
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CLAUSE_STATE_TRANS = {
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"alias" => EXPR_FNAME,
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"and" => EXPR_BEG,
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"begin" => EXPR_BEG,
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"case" => EXPR_BEG,
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"class" => EXPR_BEG,
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"def" => EXPR_FNAME,
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"defined?" => EXPR_END,
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"do" => EXPR_BEG,
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"else" => EXPR_BEG,
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"elsif" => EXPR_BEG,
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"end" => EXPR_END,
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"ensure" => EXPR_BEG,
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"for" => EXPR_BEG,
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"if" => EXPR_BEG,
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"in" => EXPR_BEG,
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"module" => EXPR_BEG,
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"nil" => EXPR_END,
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"not" => EXPR_BEG,
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"or" => EXPR_BEG,
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"rescue" => EXPR_MID,
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"return" => EXPR_MID,
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"self" => EXPR_END,
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"super" => EXPR_END,
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"then" => EXPR_BEG,
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"undef" => EXPR_FNAME,
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"unless" => EXPR_BEG,
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"until" => EXPR_BEG,
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"when" => EXPR_BEG,
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"while" => EXPR_BEG,
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"yield" => EXPR_END
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}
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ENINDENT_CLAUSE = [
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"case", "class", "def", "do", "for", "if",
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"module", "unless", "until", "while", "begin" #, "when"
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]
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DEINDENT_CLAUSE = ["end"]
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PARCENT_LTYPE = {
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"q" => "\'",
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"Q" => "\"",
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"x" => "\`",
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"r" => "\/"
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}
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PARCENT_PAREN = {
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"{" => "}",
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"[" => "]",
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"<" => ">",
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"(" => ")"
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}
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def lex_init()
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@OP = Trie.new
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@OP.def_rules("\0", "\004", "\032"){}
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@OP.def_rules(" ", "\t", "\f", "\r", "\13") do
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@space_seen = TRUE
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next
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end
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@OP.def_rule("#") do
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|op, rests|
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@ltype = "#"
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identify_comment(rests)
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end
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@OP.def_rule("\n") do
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print "\\n\n" if $DEBUG
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if @lex_state == EXPR_BEG || @lex_state == EXPR_FNAME
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@continue = TRUE
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else
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@lex_state = EXPR_BEG
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end
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end
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@OP.def_rules("*", "*=", "**=", "**") {@lex_state = EXPR_BEG}
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@OP.def_rules("!", "!=", "!~") {@lex_state = EXPR_BEG}
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@OP.def_rules("=", "==", "===", "=~", "=>") {@lex_state = EXPR_BEG}
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@OP.def_rules("<", "<=", "<=>", "<<", "<=") {@lex_state = EXPR_BEG}
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@OP.def_rules(">", ">=", ">>", ">=") {@lex_state = EXPR_BEG}
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@OP.def_rules("'", '"') do
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|op, rests|
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@ltype = op
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@quoted = op
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identify_string(rests)
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end
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@OP.def_rules("`") do
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|op, rests|
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if @lex_state != EXPR_FNAME
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@ltype = op
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@quoted = op
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identify_string(rests)
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end
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end
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@OP.def_rules('?') do
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|op, rests|
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@lex_state = EXPR_END
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identify_question(rests)
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end
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@OP.def_rules("&", "&&", "&=", "|", "||", "|=") do
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@lex_state = EXPR_BEG
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end
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@OP.def_rule("+@", proc{@lex_state == EXPR_FNAME}) {}
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@OP.def_rule("-@", proc{@lex_state == EXPR_FNAME}) {}
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@OP.def_rules("+=", "-=") {@lex_state = EXPR_BEG}
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@OP.def_rules("+", "-") do
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|op, rests|
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if @lex_state == EXPR_ARG
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if @space_seen and rests[0] =~ /[0-9]/
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identify_number(rests)
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else
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@lex_state = EXPR_BEG
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end
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elsif @lex_state != EXPR_END and rests[0] =~ /[0-9]/
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identify_number(rests)
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else
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@lex_state = EXPR_BEG
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end
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end
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@OP.def_rule(".") do
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|op, rests|
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@lex_state = EXPR_BEG
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if rests[0] =~ /[0-9]/
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rests.unshift op
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identify_number(rests)
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end
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end
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@OP.def_rules("..", "...") {@lex_state = EXPR_BEG}
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lex_int2
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end
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def lex_int2
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@OP.def_rules("]", "}", ")") do
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@lex_state = EXPR_END
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@indent -= 1
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end
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@OP.def_rule(":") {}
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@OP.def_rule("::") {@lex_state = EXPR_BEG}
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@OP.def_rule("/") do
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|op, rests|
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if @lex_state == EXPR_BEG || @lex_state == EXPR_MID
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@ltype = op
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@quoted = op
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identify_string(rests)
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elsif rests[0] == '='
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rests.shift
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@lex_state = EXPR_BEG
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elsif @lex_state == EXPR_ARG and @space_seen and rests[0] =~ /\s/
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@ltype = op
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@quoted = op
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identify_string(rests)
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else
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@lex_state = EXPR_BEG
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end
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end
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@OP.def_rules("^", "^=") {@lex_state = EXPR_BEG}
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@OP.def_rules(",", ";") {@lex_state = EXPR_BEG}
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@OP.def_rule("~") {@lex_state = EXPR_BEG}
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@OP.def_rule("~@", proc{@lex_state = EXPR_FNAME}) {}
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@OP.def_rule("(") do
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@lex_state = EXPR_BEG
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@indent += 1
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end
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@OP.def_rule("[]", proc{@lex_state == EXPR_FNAME}) {}
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@OP.def_rule("[]=", proc{@lex_state == EXPR_FNAME}) {}
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@OP.def_rule("[") do
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@indent += 1
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if @lex_state != EXPR_FNAME
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@lex_state = EXPR_BEG
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end
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end
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@OP.def_rule("{") do
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@lex_state = EXPR_BEG
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@indent += 1
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end
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@OP.def_rule('\\') {|op, rests| identify_escape(rests)} #')
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@OP.def_rule('%') do
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|op, rests|
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if @lex_state == EXPR_BEG || @lex_state == EXPR_MID
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identify_quotation(rests)
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elsif rests[0] == '='
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rests.shift
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elsif @lex_state == EXPR_ARG and @space_seen and rests[0] =~ /\s/
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identify_quotation(rests)
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else
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@lex_state = EXPR_BEG
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end
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end
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@OP.def_rule('$') do
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|op, rests|
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identify_gvar(rests)
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end
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@OP.def_rule('@') do
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|op, rests|
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if rests[0] =~ /[\w_]/
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rests.unshift op
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identify_identifier(rests)
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end
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end
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@OP.def_rule("") do
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|op, rests|
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printf "match: start %s: %s", op, rests.inspect if $DEBUG
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if rests[0] =~ /[0-9]/
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identify_number(rests)
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elsif rests[0] =~ /[\w_]/
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identify_identifier(rests)
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end
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printf "match: end %s: %s", op, rests.inspect if $DEBUG
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end
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end
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def lex(l)
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chrs = l.split(//)
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tokens = []
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case @ltype
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when "'", '"', '`', '/'
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identify_string(chrs)
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return if chrs.empty?
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when "#"
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identify_comment(chrs)
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return
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when "="
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if l =~ /^=end/
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$ltype = nil
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return
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end
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else
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if l =~ /^=begin/
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$ltype = "="
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return
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end
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end
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until chrs.empty?
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@space_seen = FALSE
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printf "perse: %s\n", chrs.join("") if $DEBUG
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@OP.match(chrs)
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printf "lex_state: %s continue: %s\n", @lex_state.id2name, @continue if $DEBUG
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end
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end
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def identify_gvar(chrs)
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@lex_state = EXPR_END
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ch = chrs.shift
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case ch
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when /[_~*$?!@/\\;,.=:<>"]/ #"
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return
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when "-"
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ch = chrs.shift
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return
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when "&", "`", "'", "+"
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return
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|
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when /[1-9]/
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chrs.unshift ch
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v = "$"
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while (ch = chrs.shift) =~ /[0-9]/
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end
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chrs.unshift ch
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return
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when /\w/
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chrs.unshift ch
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chrs.unshift "$"
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identify_identifier(chrs)
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return
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||
|
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else
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chrs.unshift ch
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return
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end
|
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end
|
||
|
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def identify_identifier(chrs)
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token = ""
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token.concat chrs.shift if chrs[0] =~ /[$@]/
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while (ch = chrs.shift) =~ /\w|_/
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print ":", ch, ":" if $DEBUG
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token.concat ch
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end
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chrs.unshift ch
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||
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if ch == "!" or ch == "?"
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chrs.shift
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token.concat ch
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end
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||
# fix token
|
||
|
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if token =~ /^[$@]/
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@lex_state = EXPR_END
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return
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end
|
||
|
||
print token, "\n" if $DEBUG
|
||
if state = CLAUSE_STATE_TRANS[token]
|
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if @lex_state != EXPR_BEG and token =~ /^(if|unless|while|until)/
|
||
# 修飾子
|
||
else
|
||
if ENINDENT_CLAUSE.include?(token)
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@indent += 1
|
||
elsif DEINDENT_CLAUSE.include?(token)
|
||
@indent -= 1
|
||
end
|
||
end
|
||
@lex_state = state
|
||
return
|
||
end
|
||
if @lex_state == EXPR_FNAME
|
||
@lex_state = EXPR_END
|
||
if chrs[0] == '='
|
||
chrs.shift
|
||
end
|
||
elsif @lex_state == EXPR_BEG
|
||
@lex_state = EXPR_ARG
|
||
else
|
||
@lex_state = EXPR_END
|
||
end
|
||
end
|
||
|
||
def identify_quotation(chrs)
|
||
ch = chrs.shift
|
||
if lt = PARCENT_LTYPE[ch]
|
||
ch = chrs.shift
|
||
else
|
||
lt = "\""
|
||
end
|
||
if ch !~ /\W/
|
||
chrs.unshift ch
|
||
next
|
||
end
|
||
@ltype = lt
|
||
unless @quoted = PARCENT_PAREN[ch]
|
||
@quoted = ch
|
||
end
|
||
identify_string(chrs)
|
||
end
|
||
|
||
def identify_number(chrs)
|
||
@lex_state = EXPR_END
|
||
|
||
ch = chrs.shift
|
||
case ch
|
||
when /0/
|
||
if (ch = chrs[0]) == "x"
|
||
chrs.shift
|
||
match = /[0-9a-f_]/
|
||
else
|
||
match = /[0-7_]/
|
||
end
|
||
while ch = chrs.shift
|
||
if ch !~ match
|
||
chrs.unshift ch
|
||
break
|
||
end
|
||
end
|
||
return
|
||
end
|
||
|
||
while ch = chrs.shift
|
||
case ch
|
||
when /[0-9]/
|
||
when "e", "E"
|
||
# type = FLOAT
|
||
unless (ch = chrs.shift) == "+" or ch == "-"
|
||
chrs.unshift ch
|
||
end
|
||
when "."
|
||
# type = FLOAT
|
||
when "_"
|
||
else
|
||
chrs.unshift ch
|
||
return
|
||
end
|
||
end
|
||
end
|
||
|
||
def identify_question(chrs)
|
||
@lex_state = EXPR_END
|
||
|
||
if chrs.shift == "\\" #"
|
||
identify_escape(chrs)
|
||
end
|
||
end
|
||
|
||
def identify_string(chrs)
|
||
while ch = chrs.shift
|
||
if @quoted == ch
|
||
if @ltype == "/"
|
||
if chrs[0] =~ /i|o|n|e|s/
|
||
chrs.shift
|
||
end
|
||
end
|
||
@ltype = nil
|
||
@quoted = nil
|
||
@lex_state = EXPR_END
|
||
break
|
||
elsif ch == '\\' #'
|
||
identify_escape(chrs)
|
||
end
|
||
end
|
||
end
|
||
|
||
def identify_comment(chrs)
|
||
while ch = chrs.shift
|
||
if ch == "\\" #"
|
||
identify_escape(chrs)
|
||
end
|
||
if ch == "\n"
|
||
@ltype = nil
|
||
chrs.unshift ch
|
||
break
|
||
end
|
||
end
|
||
end
|
||
|
||
def identify_escape(chrs)
|
||
ch = chrs.shift
|
||
case ch
|
||
when "\n", "\r", "\f"
|
||
@continue = TRUE
|
||
when "\\", "n", "t", "r", "f", "v", "a", "e", "b" #"
|
||
when /[0-7]/
|
||
chrs.unshift ch
|
||
3.times do
|
||
ch = chrs.shift
|
||
case ch
|
||
when /[0-7]/
|
||
when nil
|
||
break
|
||
else
|
||
chrs.unshift ch
|
||
break
|
||
end
|
||
end
|
||
when "x"
|
||
2.times do
|
||
ch = chrs.shift
|
||
case ch
|
||
when /[0-9a-fA-F]/
|
||
when nil
|
||
break
|
||
else
|
||
chrs.unshift ch
|
||
break
|
||
end
|
||
end
|
||
when "M"
|
||
if (ch = chrs.shift) != '-'
|
||
chrs.unshift ch
|
||
elsif (ch = chrs.shift) == "\\" #"
|
||
identify_escape(chrs)
|
||
end
|
||
return
|
||
when "C", "c", "^"
|
||
if ch == "C" and (ch = chrs.shift) != "-"
|
||
chrs.unshift ch
|
||
elsif (ch = chrs.shift) == "\\" #"
|
||
identify_escape(chrs)
|
||
end
|
||
return
|
||
end
|
||
end
|
||
end
|
||
|
||
class Trie
|
||
extend Exception2MessageMapper
|
||
def_exception :ErrNodeNothing, "node nothing"
|
||
def_exception :ErrNodeAlreadyExists, "node already exists"
|
||
|
||
class Node
|
||
# postprocがなければ抽象ノード, nilじゃなければ具象ノード
|
||
def initialize(preproc = nil, postproc = nil)
|
||
@Tree = {}
|
||
@preproc = preproc
|
||
@postproc = postproc
|
||
end
|
||
|
||
def preproc(p)
|
||
@preproc = p
|
||
end
|
||
|
||
def postproc(p)
|
||
@postproc = p
|
||
end
|
||
|
||
def search(chrs, opt = nil)
|
||
return self if chrs.empty?
|
||
ch = chrs.shift
|
||
if node = @Tree[ch]
|
||
node.search(chrs, opt)
|
||
else
|
||
if opt
|
||
chrs.unshift ch
|
||
self.create_subnode(chrs)
|
||
else
|
||
Trie.fail ErrNodeNothing
|
||
end
|
||
end
|
||
end
|
||
|
||
def create_subnode(chrs, preproc = nil, postproc = nil)
|
||
ch = chrs.shift
|
||
if node = @Tree[ch]
|
||
if chrs.empty?
|
||
Trie.fail ErrNodeAlreadyExists
|
||
else
|
||
node.create_subnode(chrs, preproc, postproc)
|
||
end
|
||
else
|
||
if chrs.empty?
|
||
node = Node.new(preproc, postproc)
|
||
else
|
||
node = Node.new
|
||
node.create_subnode(chrs, preproc, postproc)
|
||
end
|
||
@Tree[ch] = node
|
||
end
|
||
node
|
||
end
|
||
|
||
def match(chrs, op = "")
|
||
print "match: ", chrs, ":", op, "\n" if $DEBUG
|
||
if chrs.empty?
|
||
if @preproc.nil? || @preproc.call(op, chrs)
|
||
printf "op1: %s\n", op if $DEBUG
|
||
@postproc.call(op, chrs)
|
||
""
|
||
else
|
||
nil
|
||
end
|
||
else
|
||
ch = chrs.shift
|
||
if node = @Tree[ch]
|
||
if ret = node.match(chrs, op+ch)
|
||
return ch+ret
|
||
elsif @postproc and @preproc.nil? || @preproc.call(op, chrs)
|
||
chrs.unshift ch
|
||
printf "op2: %s\n", op if $DEBUG
|
||
@postproc.call(op, chrs)
|
||
return ""
|
||
else
|
||
chrs.unshift ch
|
||
return nil
|
||
end
|
||
else
|
||
if @postproc and @preproc.nil? || @preproc.call(op, chrs)
|
||
printf "op3: %s\n", op if $DEBUG
|
||
chrs.unshift ch
|
||
@postproc.call(op, chrs)
|
||
return ""
|
||
else
|
||
chrs.unshift ch
|
||
return nil
|
||
end
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
def initialize
|
||
@head = Node.new("")
|
||
end
|
||
|
||
def def_rule(token, preproc = nil, postproc = nil)
|
||
node = search(token, :CREATE)
|
||
# print node.inspect, "\n" if $DEBUG
|
||
node.preproc(preproc)
|
||
if iterator?
|
||
node.postproc(proc)
|
||
elsif postproc
|
||
node.postproc(postproc)
|
||
end
|
||
end
|
||
|
||
def def_rules(*tokens)
|
||
if iterator?
|
||
p = proc
|
||
end
|
||
for token in tokens
|
||
def_rule(token, nil, p)
|
||
end
|
||
end
|
||
|
||
def preporc(token)
|
||
node = search(token)
|
||
node.preproc proc
|
||
end
|
||
|
||
def postproc(token)
|
||
node = search(token)
|
||
node.postproc proc
|
||
end
|
||
|
||
def search(token, opt = nil)
|
||
@head.search(token.split(//), opt)
|
||
end
|
||
|
||
def match(token)
|
||
token = token.split(//) if token.kind_of?(String)
|
||
ret = @head.match(token)
|
||
printf "match end: %s:%s", ret, token.inspect if $DEBUG
|
||
ret
|
||
end
|
||
|
||
def inspect
|
||
format("<Trie: @head = %s>", @head.inspect)
|
||
end
|
||
end
|
||
|
||
if /^-tt(.*)$/ =~ ARGV[0]
|
||
# Tracer.on
|
||
case $1
|
||
when "1"
|
||
tr = Trie.new
|
||
print "0: ", tr.inspect, "\n"
|
||
tr.def_rule("=") {print "=\n"}
|
||
print "1: ", tr.inspect, "\n"
|
||
tr.def_rule("==") {print "==\n"}
|
||
print "2: ", tr.inspect, "\n"
|
||
|
||
print "case 1:\n"
|
||
print tr.match("="), "\n"
|
||
print "case 2:\n"
|
||
print tr.match("=="), "\n"
|
||
print "case 3:\n"
|
||
print tr.match("=>"), "\n"
|
||
|
||
when "2"
|
||
tr = Trie.new
|
||
print "0: ", tr.inspect, "\n"
|
||
tr.def_rule("=") {print "=\n"}
|
||
print "1: ", tr.inspect, "\n"
|
||
tr.def_rule("==", proc{FALSE}) {print "==\n"}
|
||
print "2: ", tr.inspect, "\n"
|
||
|
||
print "case 1:\n"
|
||
print tr.match("="), "\n"
|
||
print "case 2:\n"
|
||
print tr.match("=="), "\n"
|
||
print "case 3:\n"
|
||
print tr.match("=>"), "\n"
|
||
end
|
||
exit
|
||
end
|
||
|
||
module CONTEXT
|
||
def _=(value)
|
||
@_ = value
|
||
end
|
||
|
||
def _
|
||
@_
|
||
end
|
||
|
||
def quit
|
||
exit
|
||
end
|
||
|
||
def trace_load(opt = nil)
|
||
if opt
|
||
@Trace_require = opt
|
||
else
|
||
@Trace_require = !@Trace_require
|
||
end
|
||
print "Switch to load/require #{unless @Trace_require; ' non';end} trace mode.\n"
|
||
if @Trace_require
|
||
eval %{
|
||
class << self
|
||
alias load rbc_load
|
||
alias require rbc_require
|
||
end
|
||
}
|
||
else
|
||
eval %{
|
||
class << self
|
||
alias load rbc_load_org
|
||
alias require rbc_require_org
|
||
end
|
||
}
|
||
end
|
||
@Trace_require
|
||
end
|
||
|
||
alias rbc_load_org load
|
||
def rbc_load(file_name)
|
||
return true if load_sub(file_name)
|
||
raise LoadError, "No such file to load -- #{file_name}"
|
||
end
|
||
|
||
alias rbc_require_org require
|
||
def rbc_require(file_name)
|
||
rex = Regexp.new("#{Regexp.quote(file_name)}(\.o|\.rb)?")
|
||
return false if $".find{|f| f =~ rex}
|
||
|
||
case file_name
|
||
when /\.rb$/
|
||
if load_sub(file_name)
|
||
$:.push file_name
|
||
return true
|
||
end
|
||
when /\.(so|o|sl)$/
|
||
require_org(file_name)
|
||
end
|
||
|
||
if load_sub(f = file_name + ".rb")
|
||
$:.push f
|
||
end
|
||
require(file_name)
|
||
end
|
||
|
||
def load_sub(fn)
|
||
if fn =~ /^#{Regexp.quote(File::Separator)}/
|
||
return false unless File.exist?(fn)
|
||
BC.new.eval_input FileInputMethod.new(fn), self, CONFIG[:BIND]
|
||
return true
|
||
end
|
||
|
||
for path in $:
|
||
if File.exist?(f = File.join(path, fn))
|
||
BC.new.eval_input FileInputMethod.new(f), self, CONFIG[:BIND]
|
||
return true
|
||
end
|
||
end
|
||
return false
|
||
end
|
||
|
||
def inspect(opt = nil)
|
||
if opt
|
||
CONFIG[:INSPECT] = opt
|
||
else
|
||
CONFIG[:INSPECT] = !$INSPECT
|
||
end
|
||
print "Switch to#{unless $INSPECT; ' non';end} inspect mode.\n"
|
||
$INSPECT
|
||
end
|
||
|
||
def run
|
||
CONFIG[:BIND] = proc
|
||
|
||
if CONFIG[:TRACE_LOAD]
|
||
trace_load true
|
||
end
|
||
|
||
for m in CONFIG[:LOAD_MODULES]
|
||
begin
|
||
require m
|
||
rescue
|
||
print $@[0], ":", $!.type, ": ", $!, "\n"
|
||
end
|
||
end
|
||
|
||
if !$0.equal?(CONFIG[0])
|
||
io = FileInputMethod.new($0)
|
||
elsif defined? Readline
|
||
io = ReadlineInputMethod.new
|
||
else
|
||
io = StdioInputMethod.new
|
||
end
|
||
|
||
BC.new.eval_input io, self, CONFIG[:BIND]
|
||
end
|
||
end
|
||
|
||
class InputMethod
|
||
attr :prompt, TRUE
|
||
|
||
def gets
|
||
end
|
||
public :gets
|
||
end
|
||
|
||
class StdioInputMethod < InputMethod
|
||
def gets
|
||
print @prompt
|
||
$stdin.gets
|
||
end
|
||
end
|
||
|
||
class FileInputMethod < InputMethod
|
||
def initialize(file)
|
||
@io = open(file)
|
||
end
|
||
|
||
def gets
|
||
l = @io.gets
|
||
print @prompt, l
|
||
l
|
||
end
|
||
end
|
||
|
||
if CONFIG[:USE_READLINE]
|
||
begin
|
||
require "readline"
|
||
print "use readline module\n"
|
||
class ReadlineInputMethod < InputMethod
|
||
include Readline
|
||
def gets
|
||
if l = readline(@prompt, TRUE)
|
||
l + "\n"
|
||
else
|
||
l
|
||
end
|
||
end
|
||
end
|
||
rescue
|
||
CONFIG[:USE_READLINE] = FALSE
|
||
end
|
||
end
|
||
end
|
||
|
||
extend BC_APPLICATION__::CONTEXT
|
||
run{}
|