neosnippet.vim/autoload/vital/_neosnippet/System/Cache.vim

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2014-05-11 08:46:20 +00:00
" Utilities for output cache.
let s:save_cpo = &cpo
set cpo&vim
function! s:getfilename(cache_dir, filename)
return s:_encode_name(a:cache_dir, a:filename)
endfunction
function! s:filereadable(cache_dir, filename)
let cache_name = s:_encode_name(a:cache_dir, a:filename)
return filereadable(cache_name)
endfunction
function! s:readfile(cache_dir, filename)
let cache_name = s:_encode_name(a:cache_dir, a:filename)
return filereadable(cache_name) ? readfile(cache_name) : []
endfunction
function! s:writefile(cache_dir, filename, list)
let cache_name = s:_encode_name(a:cache_dir, a:filename)
call writefile(a:list, cache_name)
endfunction
function! s:delete(cache_dir, filename)
echoerr 'System.Cache.delete() is obsolete. Use its deletefile() instead.'
return call('s:deletefile', a:cache_dir, a:filename)
endfunction
function! s:deletefile(cache_dir, filename)
let cache_name = s:_encode_name(a:cache_dir, a:filename)
return delete(cache_name)
endfunction
function! s:_encode_name(cache_dir, filename)
" Check cache directory.
if !isdirectory(a:cache_dir)
call mkdir(a:cache_dir, 'p')
endif
let cache_dir = a:cache_dir
if cache_dir !~ '/$'
let cache_dir .= '/'
endif
return cache_dir . s:_create_hash(cache_dir, a:filename)
endfunction
function! s:check_old_cache(cache_dir, filename)
" Check old cache file.
let cache_name = s:_encode_name(a:cache_dir, a:filename)
let ret = getftime(cache_name) == -1
\ || getftime(cache_name) <= getftime(a:filename)
if ret && filereadable(cache_name)
" Delete old cache.
call delete(cache_name)
endif
return ret
endfunction
function! s:_create_hash(dir, str)
if len(a:dir) + len(a:str) < 150
let hash = substitute(substitute(
\ a:str, ':', '=-', 'g'), '[/\\]', '=+', 'g')
elseif exists('*sha256')
let hash = sha256(a:str)
else
" Use simple hash.
let sum = 0
for i in range(len(a:str))
let sum += char2nr(a:str[i]) * (i + 1)
endfor
let hash = printf('%x', sum)
endif
return hash
endfunction
let &cpo = s:save_cpo
unlet s:save_cpo
" vim:set et ts=2 sts=2 sw=2 tw=0: