Topic: AutoLisp help

[JohnK]

The help for AutoLisp has always been a bit vague/off/lacking in sections (COND for example). If you could change any AutoLisp help section which one would you change--and what would you add/change?

[JohnK]

I'll add an easy one:

ASCII/CHR
I would add a decimal ASCII chart.

Code: [Select]

The decimal ASCII set:

    0 nul    1 soh    2 stx    3 etx    4 eot    5 enq    6 ack    7 bel
    8 bs     9 ht    10 nl    11 vt    12 np    13 cr    14 so    15 si
   16 dle   17 dc1   18 dc2   19 dc3   20 dc4   21 nak   22 syn   23 etb
   24 can   25 em    26 sub   27 esc   28 fs    29 gs    30 rs    31 us
   32 sp    33  !    34  "    35  #    36  $    37  %    38  &    39  '
   40  (    41  )    42  *    43  +    44  ,    45  -    46  .    47  /
   48  0    49  1    50  2    51  3    52  4    53  5    54  6    55  7
   56  8    57  9    58  :    59  ;    60  <    61  =    62  >    63  ?
   64  @    65  A    66  B    67  C    68  D    69  E    70  F    71  G
   72  H    73  I    74  J    75  K    76  L    77  M    78  N    79  O
   80  P    81  Q    82  R    83  S    84  T    85  U    86  V    87  W
   88  X    89  Y    90  Z    91  [    92  \    93  ]    94  ^    95  _
   96  `    97  a    98  b    99  c   100  d   101  e   102  f   103  g
  104  h   105  i   106  j   107  k   108  l   109  m   110  n   111  o
  112  p   113  q   114  r   115  s   116  t   117  u   118  v   119  w
  120  x   121  y   122  z   123  {   124  |   125  }   126  ~   127 del

[Rod]

I'm not sure about the help file, but a list of common error/mistakes to help beginners. I made these mistakes, the first people I taught lisp made the mistakes, Autodesk made these same mistakes in commands and express tools

When using (command "pedit" ... check the status of peditaccept system variable
When using (ssget "x" ... did you mean to include objects in paperspace
When passing a point to a (command ... do you mean to use osnaps

Could end up being quite a long list, could probably be a thread on its own.

Cheers, Rod

[BIGAL]

When using (ssget "x" ... did you mean to include objects in paperspace, this exists all ready.

(ssget "X" '(410 . "Modelspace"))

[Rod]

Yeah, and its a beginner mistake not to do it like that.
Sorry if I wasn't more clear.

[baitang36]

Add reading and writing methods of binary files

[JohnK]

Add reading and writing methods of binary files

Interesting! ...why/when would you read/write binary with AutoLisp? Wouldn't you just use any of the other OS supported languages?

[baitang36]

Add reading and writing methods of binary files

Interesting! ...why/when would you read/write binary with AutoLisp? Wouldn't you just use any of the other OS supported languages?

In fact, AutoLISP itself has the ability to read and write binary files, but Autodesk does not disclose these functions.
 For example, the function to read binary files is  "_read-nb"

[JohnK]

How do you use "_read-nb"?

But more importantly, why would you use it? I mean to ask: instead, should you use C, C++, C#, etc to read/write binary files?

[baitang36]

How do you use "_read-nb"?

But more importantly, why would you use it? I mean to ask: instead, should you use C, C++, C#, etc to read/write binary files?

I don't want to use other languages. It's very slow to operate files in other languages, and the compatibility is not good. It is more convenient and faster to operate binary files directly with AutoLISP.

I have a way to turn unpublished reserved functions into normal functions

[domenicomaria]

I have a way to turn unpublished reserved functions into normal functions

and what is this way? 

[baitang36]

I have a way to turn unpublished reserved functions into normal functions

and what is this way? 

load syz-bin.fas
(syz-read-bin num filehand)
function syz-read-bin is _read-nb
function syz-write-bin is _write-nb-str

[domenicomaria]

. . . while BricsCAD . . .

[baitang36]

. . . while BricsCAD . . .

Can bricscad run Acad's Fas file? You can try the attachment syz-bin.fas

[domenicomaria]

Can bricscad run Acad's Fas file? You can try the attachment syz-bin.fas

https://forum.bricsys.com/discussion/8248

[baitang36]

Can bricscad run Acad's Fas file? You can try the attachment syz-bin.fas

https://forum.bricsys.com/discussion/8248

Thank you
I read this page. BRICs can't load Fas and vlx. In fact, Fas can be decompiled into LSP and then loaded. Now there are mature decompilation tools.

[baitang36]

Can bricscad run Acad's Fas file? You can try the attachment syz-bin.fas

https://forum.bricsys.com/discussion/8248

I developed Fas encryption tool, and my PFAS sells well. Many LISP programmers are using my tools to protect their source code.
Decompilation tool is developed by others. I study it to prevent it.