mirror of
https://github.com/SpaceVim/SpaceVim.git
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59 lines
1.6 KiB
VimL
59 lines
1.6 KiB
VimL
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" =============================================================================
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" Filename: autoload/calendar/cipher.vim
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" Author: itchyny
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" License: MIT License
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" Last Change: 2015/03/29 06:25:35.
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" =============================================================================
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let s:save_cpo = &cpo
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set cpo&vim
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" Caesar cipher functions.
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" This DOES NOT encrypt a message into a code difficult to revive the
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" original message. This module is used for the client id and api key of
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" the default google client in setting.vim, because I don't want to save
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" the keys in raw strings, which can be extracted easily.
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" Reference: http://en.wikipedia.org/wiki/Caesar_cipher
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function! calendar#cipher#cipher(val, num) abort
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if type(a:val) == type('')
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return s:cipher(a:val, a:num)
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elseif type(a:val) == type(0)
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return s:cipher(a:val . '', a:num)
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elseif type(a:val) == type([])
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return map(a:val, 'calendar#cipher#cipher(v:val, a:num)')
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elseif type(a:val) == type({})
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let ret = {}
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for key in keys(a:val)
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let ret[key] = calendar#cipher#cipher(a:val[key], a:num)
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endfor
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return ret
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endif
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endfunction
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function! calendar#cipher#decipher(val, num) abort
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return calendar#cipher#cipher(a:val, - a:num)
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endfunction
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function! s:cipher(str, num) abort
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let ret = ''
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let r = range(len(a:str))
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for i in r
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let nr = char2nr(a:str[i])
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if 32 <= nr && nr < 127
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let nr = nr + a:num - 32
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while nr < 0
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let nr += 127 - 32
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endwhile
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let nr = nr % (127 - 32) + 32
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let ret .= nr2char(nr)
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else
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return ''
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endif
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endfor
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return ret
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endfunction
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let &cpo = s:save_cpo
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unlet s:save_cpo
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