[编程交流] Lisp文件需要一些帮助。

[b][color=RED]([/color][/b][b][color=BLUE]defun[/color][/b] [color=black]_SnapSetting[/color] [b][color=RED]([/color][/b] n [b][color=BLUE]/[/color][/b] _GetBits [color=black]os [/color][b][color=RED])[/color][/b]
 [i][color=#990099];; This is not a practical example in[/color][/i]
 [i][color=#990099];; any way, as the easiest way to accomplish[/color][/i]
 [i][color=#990099];; this task would be to IOR the existing[/color][/i]
 [i][color=#990099];; snap value with that which is desired -[/color][/i]
 [i][color=#990099];; however, I am trying to demonstrate a possible[/color][/i]
 [i][color=#990099];; method to accomplish the same operation *without*[/color][/i]
 [i][color=#990099];; the use of bit-wise inclusive OR function.[/color][/i]
 [b][color=RED]([/color][/b][b][color=BLUE]defun[/color][/b] _GetBits [b][color=RED]([/color][/b] x [b][color=RED])[/color][/b]
   [i][color=#990099];; This function returns a list of all the bits[/color][/i]
   [i][color=#990099];; that make up a bit coded value 'x'.[/color][/i]
   [b][color=RED]([/color][/b][b][color=BLUE]defun[/color][/b] _GetBits [b][color=RED]([/color][/b] x i [b][color=RED])[/color][/b]
     [b][color=RED]([/color][/b][b][color=BLUE]if[/color][/b] [b][color=RED]([/color][/b][b][color=BLUE]<[/color][/b] [b][color=#009900]0[/color][/b] x[b][color=RED])[/color][/b]
       [b][color=RED]([/color][/b][b][color=BLUE]if[/color][/b] [b][color=RED]([/color][/b][b][color=BLUE]=[/color][/b] i [b][color=RED]([/color][/b][b][color=BLUE]logand[/color][/b] x i[b][color=RED]))[/color][/b]
         [b][color=RED]([/color][/b][b][color=BLUE]cons[/color][/b] i [b][color=RED]([/color][/b]_GetBits [b][color=RED]([/color][/b][b][color=BLUE]-[/color][/b] x i[b][color=RED])[/color][/b] [b][color=RED]([/color][/b][b][color=BLUE]lsh[/color][/b] i [b][color=#009900]1[/color][/b][b][color=RED])))[/color][/b]
         [b][color=RED]([/color][/b]_GetBits x [b][color=RED]([/color][/b][b][color=BLUE]lsh[/color][/b] i [b][color=#009900]1[/color][/b][b][color=RED]))[/color][/b]
       [b][color=RED])[/color][/b]
     [b][color=RED])[/color][/b]
   [b][color=RED])[/color][/b]
   [b][color=RED]([/color][/b]_GetBits x [b][color=#009900]1[/color][/b][b][color=RED])[/color][/b]
 [b][color=RED])[/color][/b]
 [i][color=#990099];; Split n into its constituent bits and get the current[/color][/i]
 [i][color=#990099];; OSMODE value for comparison.[/color][/i]
 
 [b][color=RED]([/color][/b][b][color=BLUE]setq[/color][/b] n [b][color=RED]([/color][/b]_GetBits n[b][color=RED])[/color][/b] [color=black]os [/color][b][color=RED]([/color][/b][b][color=BLUE]getvar[/color][/b] [b][color=DARKRED]'[/color][/b]OSMODE[b][color=RED]))[/color][/b]
 [i][color=#990099];; Now we do the operation that a bit-wise inclusive[/color][/i]
 [i][color=#990099];; OR would do in one step: If the bits constituting[/color][/i]
 [i][color=#990099];; our value 'n' do not appear in the current OSMODE[/color][/i]
 [i][color=#990099];; value, then add them to it.[/color][/i]
 
 [b][color=RED]([/color][/b][b][color=BLUE]foreach[/color][/b] bit n
   [b][color=RED]([/color][/b][b][color=BLUE]if[/color][/b] [b][color=RED]([/color][/b][b][color=BLUE]zerop[/color][/b] [b][color=RED]([/color][/b][b][color=BLUE]logand[/color][/b] bit [color=black]os[/color][b][color=RED]))[/color][/b]
     [b][color=RED]([/color][/b][b][color=BLUE]setq[/color][/b] [color=black]os[/color] [b][color=RED]([/color][/b][b][color=BLUE]+[/color][/b] [color=black]os [/color]bit[b][color=RED]))[/color][/b]
   [b][color=RED])[/color][/b]
 [b][color=RED])[/color][/b]
 [b][color=RED]([/color][/b][b][color=BLUE]setvar[/color][/b] [b][color=DARKRED]'[/color][/b]OSMODE [color=black]os[/color][b][color=RED])[/color][/b]
[b][color=RED])[/color][/b]

(setq os (getvar 'OSMODE))
(setvar 'OSMODE (+ 1 2 4 32 128 8192))

(setvar 'OSMODE os)

(setq os (getvar "OSMODE")) ;Save User Object Snaps

9

(setq os (getvar "OSMODE")) ;Save User Object Snaps

(setvar "OSMODE" Your new setting here) ; Add-on to your orginal object snap setting

(setvar "OSMODE" os) ;Restore your Saved User Object Snaps