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Diffstat (limited to 'runtime/indent/cobol.vim')
| -rw-r--r-- | runtime/indent/cobol.vim | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/runtime/indent/cobol.vim b/runtime/indent/cobol.vim new file mode 100644 index 0000000..01f7212 --- /dev/null +++ b/runtime/indent/cobol.vim @@ -0,0 +1,226 @@ +" 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 |