如何让vim将BOM显示为<feff>

Question

当我查看我们其中一台服务器上的文件时,我看到如下内容:

<feff>sku;qty
productsku;1

当我下载文件并用vi打开它时,我看不到 <feff>

我什么时候:e ++bin能看到,<feff>但我现在也看到了^ M.

<feff>sku;qty^M
productsku;1^M

但我不想设置^M.我只是想看看<feff>.另一个例子是<80>我在另一个文件中.

我怎样才能设置vim来向我展示那些特殊的字符？

〜编辑〜

该命令vi --version告诉我以下内容:

VIM - Vi IMproved 7.0 (2006 May 7, compiled Aug  4 2010 07:21:08)

它还说system-vimrc-file /etc/vimrc具有以下内容:

if v:lang =~ "utf8$" || v:lang =~ "UTF-8$"
   set fileencodings=utf-8,latin1
endif

set term=builtin_ansi
set nocompatible    " Use Vim defaults (much better!)
set bs=indent,eol,start     " allow backspacing over everything in insert mode
"set ai         " always set autoindenting on
"set backup     " keep a backup file
set viminfo='20,\"50    " read/write a .viminfo file, don't store more
            " than 50 lines of registers
set history=50      " keep 50 lines of command line history
set ruler       " show the cursor position all the time

" Only do this part when compiled with support for autocommands
if has("autocmd")
  augroup redhat
    " In text files, always limit the width of text to 78 characters
    autocmd BufRead *.txt set tw=78
    " When editing a file, always jump to the last cursor position
    autocmd BufReadPost *
    \ if line("'\"") > 0 && line ("'\"") <= line("$") |
    \   exe "normal! g'\"" |
    \ endif
  augroup END
endif

if has("cscope") && filereadable("/usr/bin/cscope")
   set csprg=/usr/bin/cscope
   set csto=0
   set cst
   set nocsverb
   " add any database in current directory
   if filereadable("cscope.out")
      cs add cscope.out
   " else add database pointed to by environment
   elseif $CSCOPE_DB != "" 
      cs add $CSCOPE_DB
   endif
   set csverb
endif

" Switch syntax highlighting on, when the terminal has colors
" Also switch on highlighting the last used search pattern.
if &t_Co > 2 || has("gui_running")
  syntax on 
  set hlsearch
endif

if &term=="xterm"
     set t_Co=8
     set t_Sb=^[[4%dm
     set t_Sf=^[[3%dm
endif

我复制了这个并将其添加到我的中,~/.vimrc但这些更改都不是我想要的.如果有一些情况,我可能不得不玩这些.

有没有人知道vi --version在编辑文件时是否还有其他文件会被读取？

Answer 1

:help 'bomb' 解释了Vim的行为:

当Vim读取文件并且'fileencodings'以"ucs-bom"开头时,检查是否存在BOM,并相应地设置'炸弹'.除非设置了'binary',否则它将从第一行中删除,因此您在编辑时不会看到它.

所以,

:set fencs-=ucs-bom

会关闭它,但编码检测也会被打破!根据我的实验,显式编码设置(via :edit ++enc=ucs2-le)也设置'bomb'和删除<feff>标记.所以,这条大道无处可去.

备择方案

• 正如您所知,以二进制模式进行编辑.我不推荐它,因为它有缺点.
• 在状态栏中包含指示.你必须寻找其他地方,但它总是可见的,而不仅仅是在文档的开头.强烈推荐作为Vim中的正确方法™.也很容易实现:

set statusline+=\ %{&bomb?'BOM':''}