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echoerr 'System.Cache.delete() is obsolete.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