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cobol.vim
" Vim indent file " Language: cobol " Maintainer: Ankit Jain <ajatkj@yahoo.co.in> " (formerly Tim Pope <vimNOSPAM@tpope.info>) " $Id: cobol.vim,v 1.1 2007/05/05 18:08:19 vimboss Exp $ " Last Update: By Ankit Jain on 22.03.2019 " Ankit Jain 22.03.2019 Changes & fixes: " Allow chars in 1st 6 columns " #C22032019 " Ankit Jain 24.09.2021 add b:undo_indent (request by tpope) if exists("b:did_indent") finish endif let b:did_indent = 1 setlocal expandtab setlocal indentexpr=GetCobolIndent(v:lnum) setlocal indentkeys& setlocal indentkeys+=0<*>,0/,0$,0=01,=~division,=~section,0=~end,0=~then,0=~else,0=~when,*<Return>,. let b:undo_indent = "setlocal expandtab< indentexpr< indentkeys<" " Only define the function once. if exists("*GetCobolIndent") finish endif let s:skip = 'getline(".") =~ "^.\\{6\\}[*/$-]\\|\"[^\"]*\""' function! s:prevgood(lnum) " Find a non-blank line above the current line. " Skip over comments. let lnum = a:lnum while lnum > 0 let lnum = prevnonblank(lnum - 1) let line = getline(lnum) if line !~? '^\s*[*/$-]' && line !~? '^.\{6\}[*/$CD-]' break endif endwhile return lnum endfunction function! s:stripped(lnum) return substitute(strpart(getline(a:lnum),0,72),'^\s*','','') endfunction function! s:optionalblock(lnum,ind,blocks,clauses) let ind = a:ind let clauses = '\c\<\%(\<NOT\s\+\)\@<!\%(NOT\s\+\)\=\%('.a:clauses.'\)' let begin = '\c-\@<!\<\%('.a:blocks.'\)\>' let beginfull = begin.'\ze.*\%(\n\%(\s*\%([*/$-].*\)\=\n\)*\)\=\s*\%('.clauses.'\)' let end = '\c\<end-\%('.a:blocks.'\)\>\|\%(\.\%( \|$\)\)\@=' let cline = s:stripped(a:lnum) let line = s:stripped(s:prevgood(a:lnum)) if cline =~? clauses "&& line !~? '^search\>' call cursor(a:lnum,1) let lastclause = searchpair(beginfull,clauses,end,'bWr',s:skip) if getline(lastclause) =~? clauses && s:stripped(lastclause) !~? '^'.begin let ind = indent(lastclause) elseif lastclause > 0 let ind = indent(lastclause) + shiftwidth() "let ind = ind + shiftwidth() endif elseif line =~? clauses && cline !~? end let ind = ind + shiftwidth() endif return ind endfunction function! GetCobolIndent(lnum) abort let minshft = 6 let ashft = minshft + 1 let bshft = ashft + 4 " (Obsolete) numbered lines " #C22032019: Columns 1-6 could have alphabets as well as numbers "if getline(a:lnum) =~? '^\s*\d\{6\}\%($\|[ */$CD-]\)' if getline(a:lnum) =~? '^\s*[a-zA-Z0-9]\{6\}\%($\|[ */$CD-]\)' return 0 endif let cline = s:stripped(a:lnum) " Comments, etc. must start in the 7th column if cline =~? '^[*/$-]' return minshft elseif cline =~# '^[CD]' && indent(a:lnum) == minshft return minshft endif " Divisions, sections, and file descriptions start in area A if cline =~? '\<\(DIVISION\|SECTION\)\%($\|\.\)' || cline =~? '^[FS]D\>' return ashft endif " Fields if cline =~? '^0*\(1\|77\)\>' return ashft endif if cline =~? '^\d\+\>' let cnum = matchstr(cline,'^\d\+\>') let default = 0 let step = -1 while step < 2 let lnum = a:lnum while lnum > 0 && lnum < line('$') && lnum > a:lnum - 500 && lnum < a:lnum + 500 let lnum = step > 0 ? nextnonblank(lnum + step) : prevnonblank(lnum + step) let line = getline(lnum) let lindent = indent(lnum) if line =~? '^\s*\d\+\>' let num = matchstr(line,'^\s*\zs\d\+\>') if 0+cnum == num return lindent elseif 0+cnum > num && default < lindent + shiftwidth() let default = lindent + shiftwidth() endif elseif lindent < bshft && lindent >= ashft break endif endwhile let step = step + 2 endwhile return default ? default : bshft endif let lnum = s:prevgood(a:lnum) " Hit the start of the file, use "zero" indent. if lnum == 0 return ashft endif " Initial spaces are ignored let line = s:stripped(lnum) let ind = indent(lnum) " Paragraphs. There may be some false positives. if cline =~? '^\(\a[A-Z0-9-]*[A-Z0-9]\|\d[A-Z0-9-]*\a\)\.' "\s*$' if cline !~? '^EXIT\s*\.' && line =~? '\.\s*$' return ashft endif endif " Paragraphs in the identification division. "if cline =~? '^\(PROGRAM-ID\|AUTHOR\|INSTALLATION\|' . "\ 'DATE-WRITTEN\|DATE-COMPILED\|SECURITY\)\>' "return ashft "endif if line =~? '\.$' " XXX return bshft endif if line =~? '^PERFORM\>' let perfline = substitute(line, '\c^PERFORM\s*', "", "") if perfline =~? '^\%(\k\+\s\+TIMES\)\=\s*$' let ind = ind + shiftwidth() elseif perfline =~? '^\%(WITH\s\+TEST\|VARYING\|UNTIL\)\>.*[^.]$' let ind = ind + shiftwidth() endif endif if line =~? '^\%(IF\|THEN\|ELSE\|READ\|EVALUATE\|SEARCH\|SELECT\)\>' let ind = ind + shiftwidth() endif let ind = s:optionalblock(a:lnum,ind,'ADD\|COMPUTE\|DIVIDE\|MULTIPLY\|SUBTRACT','ON\s\+SIZE\s\+ERROR') let ind = s:optionalblock(a:lnum,ind,'STRING\|UNSTRING\|ACCEPT\|DISPLAY\|CALL','ON\s\+OVERFLOW\|ON\s\+EXCEPTION') if cline !~? '^AT\s\+END\>' || line !~? '^SEARCH\>' let ind = s:optionalblock(a:lnum,ind,'DELETE\|REWRITE\|START\|WRITE\|READ','INVALID\s\+KEY\|AT\s\+END\|NO\s\+DATA\|AT\s\+END-OF-PAGE') endif if cline =~? '^WHEN\>' call cursor(a:lnum,1) " We also search for READ so that contained AT ENDs are skipped let lastclause = searchpair('\c-\@<!\<\%(SEARCH\|EVALUATE\|READ\)\>','\c\<\%(WHEN\|AT\s\+END\)\>','\c\<END-\%(SEARCH\|EVALUATE\|READ\)\>','bW',s:skip) let g:foo = s:stripped(lastclause) if s:stripped(lastclause) =~? '\c\<\%(WHEN\|AT\s\+END\)\>' "&& s:stripped(lastclause) !~? '^\%(SEARCH\|EVALUATE\|READ\)\>' let ind = indent(lastclause) elseif lastclause > 0 let ind = indent(lastclause) + shiftwidth() endif elseif line =~? '^WHEN\>' let ind = ind + shiftwidth() endif "I'm not sure why I had this "if line =~? '^ELSE\>-\@!' && line !~? '\.$' "let ind = indent(s:prevgood(lnum)) "endif if cline =~? '^\(END\)\>-\@!' " On lines with just END, 'guess' a simple shift left let ind = ind - shiftwidth() elseif cline =~? '^\(END-IF\|THEN\|ELSE\)\>-\@!' call cursor(a:lnum,indent(a:lnum)) let match = searchpair('\c-\@<!\<IF\>','\c-\@<!\%(THEN\|ELSE\)\>','\c-\@<!\<END-IF\>\zs','bnW',s:skip) if match > 0 let ind = indent(match) endif elseif cline =~? '^END-[A-Z]' let beginword = matchstr(cline,'\c\<END-\zs[A-Z0-9-]\+') let endword = 'END-'.beginword let first = 0 let suffix = '.*\%(\n\%(\%(\s*\|.\{6\}\)[*/].*\n\)*\)\=\s*' if beginword =~? '^\%(ADD\|COMPUTE\|DIVIDE\|MULTIPLY\|SUBTRACT\)$' let beginword = beginword . suffix . '\<\%(NOT\s\+\)\=ON\s\+SIZE\s\+ERROR' let g:beginword = beginword let first = 1 elseif beginword =~? '^\%(STRING\|UNSTRING\)$' let beginword = beginword . suffix . '\<\%(NOT\s\+\)\=ON\s\+OVERFLOW' let first = 1 elseif beginword =~? '^\%(ACCEPT\|DISPLAY\)$' let beginword = beginword . suffix . '\<\%(NOT\s\+\)\=ON\s\+EXCEPTION' let first = 1 elseif beginword ==? 'CALL' let beginword = beginword . suffix . '\<\%(NOT\s\+\)\=ON\s\+\%(EXCEPTION\|OVERFLOW\)' let first = 1 elseif beginword =~? '^\%(DELETE\|REWRITE\|START\|READ\|WRITE\)$' let first = 1 let beginword = beginword . suffix . '\<\%(NOT\s\+\)\=\(INVALID\s\+KEY' if beginword =~? '^READ' let first = 0 let beginword = beginword . '\|AT\s\+END\|NO\s\+DATA' elseif beginword =~? '^WRITE' let beginword = beginword . '\|AT\s\+END-OF-PAGE' endif let beginword = beginword . '\)' endif call cursor(a:lnum,indent(a:lnum)) let match = searchpair('\c-\@<!\<'.beginword.'\>','','\c\<'.endword.'\>\zs','bnW'.(first? 'r' : ''),s:skip) if match > 0 let ind = indent(match) elseif cline =~? '^\(END-\(READ\|EVALUATE\|SEARCH\|PERFORM\)\)\>' let ind = ind - shiftwidth() endif endif return ind < bshft ? bshft : ind endfunction
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