319 lines
6.9 KiB
Ruby
319 lines
6.9 KiB
Ruby
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# This file is part of Metasm, the Ruby assembly manipulation suite
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# Copyright (C) 2007 Yoann GUILLOT
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#
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# Licence is LGPL, see LICENCE in the top-level directory
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#
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# this is a little script to navigate in a disassembler dump
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#
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# copypasted from lindebug.rb
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module Ansi
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CursHome = "\e[H".freeze
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ClearLineAfter = "\e[0K"
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ClearLineBefore = "\e[1K"
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ClearLine = "\e[2K"
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ClearScreen = "\e[2J"
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def self.set_cursor_pos(y=1,x=1) "\e[#{y};#{x}H" end
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Reset = "\e[m"
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Colors = [:black, :red, :green, :yellow, :blue, :magenta, :cyan, :white, :aoeu, :reset]
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def self.color(*args)
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fg = true
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"\e[" << args.map { |a|
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case a
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when :bold; 2
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when :negative; 7
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when :normal; 22
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when :positive; 27
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else
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if col = Colors.index(a)
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add = (fg ? 30 : 40)
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fg = false
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col+add
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end
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end
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}.compact.join(';') << 'm'
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end
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def self.hline(len) "\e(0"<<'q'*len<<"\e(B" end
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TIOCGWINSZ = 0x5413
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TCGETS = 0x5401
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TCSETS = 0x5402
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CANON = 2
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ECHO = 8
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def self.get_terminal_size
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s = ''.ljust(8)
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$stdin.ioctl(TIOCGWINSZ, s) >= 0 ? s.unpack('SS') : [80, 25]
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end
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def self.set_term_canon(bool)
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tty = ''.ljust(256)
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$stdin.ioctl(TCGETS, tty)
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if bool
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tty[12] &= ~(ECHO|CANON)
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else
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tty[12] |= ECHO|CANON
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end
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$stdin.ioctl(TCSETS, tty)
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end
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ESC_SEQ = {'A' => :up, 'B' => :down, 'C' => :right, 'D' => :left,
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'1~' => :home, '2~' => :inser, '3~' => :suppr, '4~' => :end,
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'5~' => :pgup, '6~' => :pgdown,
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'P' => :f1, 'Q' => :f2, 'R' => :f3, 'S' => :f4,
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'15~' => :f5, '17~' => :f6, '18~' => :f7, '19~' => :f8,
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'20~' => :f9, '21~' => :f10, '23~' => :f11, '24~' => :f12,
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'[A' => :f1, '[B' => :f2, '[C' => :f3, '[D' => :f4, '[E' => :f5,
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'H' => :home, 'F' => :end,
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}
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def self.getkey
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c = $stdin.getc
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return c if c != ?\e
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c = $stdin.getc
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if c != ?[ and c != ?O
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$stdin.ungetc c
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return ?\e
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end
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seq = ''
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loop do
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c = $stdin.getc
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seq << c
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case c; when ?a..?z, ?A..?Z, ?~; break end
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end
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ESC_SEQ[seq] || seq
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end
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end
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class Viewer
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attr_accessor :text, :pos, :x, :y
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Color = {
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:normal => Ansi.color(:white, :black, :normal),
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:comment => Ansi.color(:blue),
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:label => Ansi.color(:green),
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:hilight => Ansi.color(:yellow),
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}
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def initialize(text)
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text = File.read(text) if File.exist? text rescue nil
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@text = text.gsub("\t", " "*8).to_a.map { |l| l.chomp }
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@pos = @posh = 0
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@x = @y = 0
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@mode = :navig
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@searchtext = 'x'
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@posstack = []
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@h, @w = Ansi.get_terminal_size
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@h -= 2
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@w -= 1
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if y = @text.index('entrypoint:')
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view(0, y)
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end
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end
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def main_loop
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Ansi.set_term_canon(true)
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$stdout.write Ansi::ClearScreen
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begin
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loop do
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refresh if not s = IO.select([$stdin], nil, nil, 0)
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handle_key(Ansi.getkey)
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end
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ensure
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Ansi.set_term_canon(false)
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$stdout.write Ansi.set_cursor_pos(@h+2, 0) + Ansi::ClearLineAfter
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end
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end
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def refresh
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case @mode
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when :navig
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refresh_navig
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when :search
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refresh_search
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end
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end
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def refresh_navig
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str = ''
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#str << Ansi::ClearScreen
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str << Ansi.set_cursor_pos(0, 0)
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hl = readtext
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(0..@h).each { |h|
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l = @text[@pos+h] || ''
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str << outline(l, hl) << Ansi::ClearLineAfter << "\n"
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}
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str << Ansi.set_cursor_pos(@y+1, @x+1)
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$stdout.write str
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end
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def refresh_search
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$stdout.write '' << Ansi.set_cursor_pos(@h+2, 1) << '/' << @searchtext << Ansi::ClearLineAfter
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end
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def outline(l, hl=nil)
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l = l[@posh, @w] || ''
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hlr = /\b#{Regexp.escape(hl)}\b/i if hl
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case l
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when /^\/\//; Color[:comment] + l + Color[:normal]
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when /^\S+:$/; Color[:label] + l + Color[:normal]
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when /^(.*)(;.*)$/
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str = $1
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cmt = $2
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str.gsub!(hlr, Color[:hilight]+hl+Color[:normal]) if hl
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str + Color[:comment] + cmt + Color[:normal]
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else
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l = l.gsub(hlr, Color[:hilight]+hl+Color[:normal]) if hl
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l
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end
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end
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def search_prev
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return if @searchtext == ''
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y = @pos+@y-1
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loop do
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y = @text.length-1 if not @text[y] or y < 0
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if x = (@text[y] =~ /#@searchtext/i)
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view(x, y)
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return
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end
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y -= 1
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break if y == @pos+@y
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end
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end
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def search_next
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return if @searchtext == ''
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y = @pos+@y+1
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loop do
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y = 0 if not @text[y]
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if x = (@text[y] =~ /#@searchtext/i)
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view(x, y)
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return
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end
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break if y == @pos+@y or (y >= @text.length and not @text[@pos+@y])
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y += 1
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end
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end
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def view(x, y)
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@posh, @x = 0, x
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if @x > @w
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@posh = @w-@x
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@x = @w
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end
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if @pos+@h < y
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@y = @h/2-1
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@pos = y-@y
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elsif @pos > y
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@y = 1
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@pos = y-@y
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else
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@y = y-@pos
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end
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end
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def readtext
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return if not l = @text[@pos+@y]
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x = (l.rindex(/\W/, [@posh+@x-1, 0].max) || -1)+1
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t = l[x..-1][/^\w+/]
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t if t and @posh+@x < x+t.length
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end
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def handle_key(k)
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case @mode
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when :navig
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handle_key_navig(k)
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when :search
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handle_key_search(k)
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end
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end
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def handle_key_search(k)
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case k
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when ?\n; @mode = :navig ; @posstack << [@posh, @pos, @x, @y] ; search_next
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when 0x20..0x7e; @searchtext << k
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when :backspace, 0x7f; @searchtext.chop!
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end
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end
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def handle_key_navig(k)
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case k
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when :f1
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if not @posstack.empty?
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@posh, @pos, @x, @y = @posstack.pop
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end
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when ?\n
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return if not label = readtext
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return if label.empty? or not newy = @text.index(@text.find { |l| l[0, label.length] == label }) or newy == @pos+@y
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@posstack << [@posh, @pos, @x, @y]
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view(0, newy)
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when :up
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if @y > 0; @y -= 1
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elsif @pos > 0; @pos -= 1
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end
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when :down
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if @y < @h; @y += 1
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elsif @pos < text.length-@h; @pos += 1
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end
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when :home
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@x = @posh = 0
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when :end
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@x = @text[@pos+@y].length
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@posh, @x = @x-@w, @w if @x > @w
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when :left
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x = @text[@pos+@y].rindex(/\W\w/, [@posh+@x-2, 0].max)
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x = x ? x+1 : @posh+@x-1
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x = @posh+@x-3 if x < @posh+@x-3
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x = 0 if x < 0
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if x < @posh; @posh, @x = x, 0
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else @x = x-@posh
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end
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#if @x > 0; @x -= 1
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#elsif @posh > 0; @posh -= 1
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#end
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when :right
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x = @text[@pos+@y].index(/\W\w/, @posh+@x)
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x = x ? x+1 : @posh+@x+1
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x = @posh+@x+3 if x > @posh+@x+3
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if x > @posh+@w; @posh, @x = x-@w, @w
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else
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@x = x-@posh
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@posh, @x = @x-@w, @w if @x > @w
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end
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#if @x < @w; @x += 1
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#elsif @posh+@w < (@text[@pos, @h].map { |l| l.length }.max); @posh += 1
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#end
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when :pgdown
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if @y < @h/2; @y += @h/2
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elsif @pos < @text.length-3*@h/2; @pos += @h/2 ; @y = @h
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else @pos = [0, @text.length-@h].max ; @y = @h
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end
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when :pgup
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if @y > @h/2; @y -= @h/2
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elsif @pos > @h/2; @pos -= @h/2 ; @y = 0
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else @pos = @y = 0
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end
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when ?q; exit
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when ?o; @text.insert(@pos+@y+1, '')
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when ?O; @text.insert(@pos+@y, '') ; handle_key_navig(:down)
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when :suppr; @text.delete_at(@pos+@y) if @text[@pos+@y] == ''
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when ?D; @text.delete_at(@pos+@y)
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when ?/
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@mode = :search
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@searchtext = ''
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when ?*
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@searchtext = readtext || ''
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search_next
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when ?n; search_next
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when ?N; search_prev
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when :f5
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ARGV << '--reload'
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load $0
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end
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end
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end
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if $0 == __FILE__ and not ARGV.delete '--reload'
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Viewer.new(ARGF.read).main_loop
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end
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