1 files changed, 90 insertions, 0 deletions
diff --git a/ext/curses/view.rb b/ext/curses/view.rb
new file mode 100644
index 0000000000..e59a74ed44
--- /dev/null
+++ b/ext/curses/view.rb
@@ -0,0 +1,90 @@
+#!/usr/local/bin/ruby
+
+require "curses"
+include Curses
+
+#
+# main
+#
+
+if ARGV.size != 1 then
+  printf("usage: view file\n");
+  exit
+end
+begin
+  fp = open(ARGV[0], "r")
+rescue
+  raise "cannot open file: #{ARGV[1]}"
+end
+
+# signal(SIGINT, finish)
+
+init_screen
+#keypad(stdscr, TRUE)
+nonl
+cbreak
+noecho
+#scrollok(stdscr, TRUE)
+
+# slurp the file
+data_lines = []
+fp.each_line { |l|
+  data_lines.push(l)
+}
+fp.close
+
+
+lptr = 0
+while TRUE
+  i = 0
+  while i < lines
+    setpos(i, 0)
+    #clrtoeol
+    addstr(data_lines[lptr + i]) #if data_lines[lptr + i]
+    i += 1
+  end
+
+  explicit = FALSE
+  n = 0
+  while TRUE
+    c = getch.chr
+    if c =~ "[0-9]" then
+      n = 10 * n + c.to_i
+    else
+      break
+    end
+  end
+
+  n = 1 if !explicit && n == 0
+
+  case c
+  when "n"  #when KEY_DOWN
+    i = 0
+    while i < n
+      if lptr + lines < data_lines.size then
+	lptr += 1
+      else
+	break
+      end
+      i += 1 
+    end
+    #wscrl(i)
+      
+  when "p"  #when KEY_UP
+    i = 0
+    while i < n
+      if lptr > 0 then
+	lptr -= 1
+      else
+	break
+      end
+      i += 1 
+    end    
+    #wscrl(-i)
+
+  when "q"
+    break
+  end
+
+end
+close_screen