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" VHDL indent ('93 syntax) " Language: VHDL " Maintainer: Gerald Lai <laigera+vim?gmail.com> " Version: 1.62 " Last Change: 2017 Oct 17 " 2023 Aug 28 by Vim Project (undo_indent) " URL: http://www.vim.org/scripts/script.php?script_id=1450 " only load this indent file when no other was loaded if exists("b:did_indent") finish endif let b:did_indent = 1 " setup indent options for local VHDL buffer setlocal indentexpr=GetVHDLindent() setlocal indentkeys=!^F,o,O,0(,0) setlocal indentkeys+==~begin,=~end\ ,=~end\ ,=~is,=~select,=~when setlocal indentkeys+==~if,=~then,=~elsif,=~else setlocal indentkeys+==~case,=~loop,=~for,=~generate,=~record,=~units,=~process,=~block,=~function,=~component,=~procedure setlocal indentkeys+==~architecture,=~configuration,=~entity,=~package let b:undo_indent = "setlocal indentexpr< indentkeys<" " constants " not a comment let s:NC = '\%(--.*\)\@<!' " end of string let s:ES = '\s*\%(--.*\)\=$' " no "end" keyword in front let s:NE = '\%(\<end\s\+\)\@<!' " option to disable alignment of generic/port mappings if !exists("g:vhdl_indent_genportmap") let g:vhdl_indent_genportmap = 1 endif " option to disable alignment of right-hand side assignment "<=" statements if !exists("g:vhdl_indent_rhsassign") let g:vhdl_indent_rhsassign = 1 endif " only define indent function once if exists("*GetVHDLindent") finish endif function GetVHDLindent() " store current line & string let curn = v:lnum let curs = getline(curn) " find previous line that is not a comment let prevn = prevnonblank(curn - 1) let prevs = getline(prevn) while prevn > 0 && prevs =~ '^\s*--' let prevn = prevnonblank(prevn - 1) let prevs = getline(prevn) endwhile let prevs_noi = substitute(prevs, '^\s*', '', '') " default indent starts as previous non-comment line's indent let ind = prevn > 0 ? indent(prevn) : 0 " backup default let ind2 = ind " indent: special; kill string so it would not affect other filters " keywords: "report" + string " where: anywhere in current or previous line let s0 = s:NC.'\<report\>\s*".*"' if curs =~? s0 let curs = "" endif if prevs =~? s0 let prevs = "" endif " indent: previous line's comment position, otherwise follow next non-comment line if possible " keyword: "--" " where: start of current line if curs =~ '^\s*--' let pn = curn - 1 let ps = getline(pn) if curs =~ '^\s*--\s' && ps =~ '--' return indent(pn) + stridx(substitute(ps, '^\s*', '', ''), '--') else " find nextnonblank line that is not a comment let nn = nextnonblank(curn + 1) let ns = getline(nn) while nn > 0 && ns =~ '^\s*--' let nn = nextnonblank(nn + 1) let ns = getline(nn) endwhile let n = indent(nn) return n != -1 ? n : ind endif endif " **************************************************************************************** " indent: align generic variables & port names " keywords: "procedure" + name, "generic", "map", "port" + "(", provided current line is part of mapping " where: anywhere in previous 2 lines " find following previous non-comment line let pn = prevnonblank(prevn - 1) let ps = getline(pn) while pn > 0 && ps =~ '^\s*--' let pn = prevnonblank(pn - 1) let ps = getline(pn) endwhile if (curs =~ '^\s*)' || curs =~? '^\s*\%(\<\%(procedure\|generic\|map\|port\)\>.*\)\@<!\w\+\s*\w*\s*$(.*)$*\s*\%(=>\s*\S\+\|:[^=]\@=\s*\%(\%(in\|out\|inout\|buffer\|linkage\)\>\|\s\+\)\)') && (prevs =~? s:NC.'\<\%(procedure\s\+\S\+\|generic\|map\|port\)\s*(\%(\s*\w\)\=' || (ps =~? s:NC.'\<\%(procedure\|generic\|map\|port\)'.s:ES && prevs =~ '^\s*(')) " align closing ")" with opening "(" if curs =~ '^\s*)' return ind2 + stridx(prevs_noi, '(') endif let m = matchend(prevs_noi, '(\s*\ze\w') if m != -1 return ind2 + m else if g:vhdl_indent_genportmap return ind2 + stridx(prevs_noi, '(') + shiftwidth() else return ind2 + shiftwidth() endif endif endif " indent: align conditional/select statement " keywords: variable + "<=" without ";" ending " where: start of previous line if prevs =~? '^\s*\S\+\s*<=[^;]*'.s:ES if g:vhdl_indent_rhsassign return ind2 + matchend(prevs_noi, '<=\s*\ze.') else return ind2 + shiftwidth() endif endif " indent: backtrace previous non-comment lines for next smaller or equal size indent " keywords: "end" + "record", "units" " where: start of previous line " keyword: ")" " where: start of previous line " keyword: without "<=" + ";" ending " where: anywhere in previous line " keyword: "=>" + ")" ending, provided current line does not begin with ")" " where: anywhere in previous line " _note_: indent allowed to leave this filter let m = 0 if prevs =~? '^\s*end\s\+\%(record\|units\)\>' let m = 3 elseif prevs =~ '^\s*)' let m = 1 elseif prevs =~ s:NC.'\%(<=.*\)\@<!;'.s:ES || (curs !~ '^\s*)' && prevs =~ s:NC.'=>.*'.s:NC.')'.s:ES) let m = 2 endif if m > 0 let pn = prevnonblank(prevn - 1) let ps = getline(pn) while pn > 0 let t = indent(pn) if ps !~ '^\s*--' && (t < ind || (t == ind && m == 3)) " make sure one of these is true " keywords: variable + "<=" without ";" ending " where: start of previous non-comment line " keywords: "procedure", "generic", "map", "port" " where: anywhere in previous non-comment line " keyword: "(" " where: start of previous non-comment line if m < 3 && ps !~? '^\s*\S\+\s*<=[^;]*'.s:ES if ps =~? s:NC.'\<\%(procedure\|generic\|map\|port\)\>' || ps =~ '^\s*(' let ind = t endif break endif let ind = t if m > 1 " find following previous non-comment line let ppn = prevnonblank(pn - 1) let pps = getline(ppn) while ppn > 0 && pps =~ '^\s*--' let ppn = prevnonblank(ppn - 1) let pps = getline(ppn) endwhile " indent: follow " keyword: "select" " where: end of following previous non-comment line " keyword: "type" " where: start of following previous non-comment line if m == 2 let s1 = s:NC.'\<select'.s:ES if ps !~? s1 && pps =~? s1 let ind = indent(ppn) endif elseif m == 3 let s1 = '^\s*type\>' if ps !~? s1 && pps =~? s1 let ind = indent(ppn) endif endif endif break endif let pn = prevnonblank(pn - 1) let ps = getline(pn) endwhile endif " indent: follow indent of previous opening statement, otherwise -sw " keyword: "begin" " where: anywhere in current line if curs =~? s:NC.'\<begin\>' " find previous opening statement of " keywords: "architecture", "block", "entity", "function", "generate", "procedure", "process" let s2 = s:NC.s:NE.'\<\%(architecture\|block\|entity\|function\|generate\|procedure\|process\)\>' let pn = prevnonblank(curn - 1) let ps = getline(pn) while pn > 0 && (ps =~ '^\s*--' || ps !~? s2) let pn = prevnonblank(pn - 1) let ps = getline(pn) if (ps =~? s:NC.'\<begin\>') return indent(pn) - shiftwidth() endif endwhile if (pn == 0) return ind - shiftwidth() else return indent(pn) endif endif " indent: +sw if previous line is previous opening statement " keywords: "record", "units" " where: anywhere in current line if curs =~? s:NC.s:NE.'\<\%(record\|units\)\>' " find previous opening statement of " keyword: "type" let s3 = s:NC.s:NE.'\<type\>' if curs !~? s3.'.*'.s:NC.'\<\%(record\|units\)\>.*'.s:ES && prevs =~? s3 let ind = ind + shiftwidth() endif return ind endif " **************************************************************************************** " indent: 0 " keywords: "architecture", "configuration", "entity", "library", "package" " where: start of current line if curs =~? '^\s*\%(architecture\|configuration\|entity\|library\|package\)\>' return 0 endif " indent: maintain indent of previous opening statement " keyword: "is" " where: start of current line " find previous opening statement of " keywords: "architecture", "block", "configuration", "entity", "function", "package", "procedure", "process", "type" if curs =~? '^\s*\<is\>' && prevs =~? s:NC.s:NE.'\<\%(architecture\|block\|configuration\|entity\|function\|package\|procedure\|process\|type\)\>' return ind2 endif " indent: maintain indent of previous opening statement " keyword: "then" " where: start of current line " find previous opening statement of " keywords: "elsif", "if" if curs =~? '^\s*\<then\>' && prevs =~? s:NC.'\%(\<elsif\>\|'.s:NE.'\<if\>\)' return ind2 endif " indent: maintain indent of previous opening statement " keyword: "generate" " where: start of current line " find previous opening statement of " keywords: "for", "if" if curs =~? '^\s*\<generate\>' && prevs =~? s:NC.s:NE.'\%(\%(\<wait\s\+\)\@<!\<for\|\<if\)\>' return ind2 endif " indent: +sw " keywords: "block", "process" " removed: "begin", "case", "elsif", "if", "loop", "record", "units", "while" " where: anywhere in previous line if prevs =~? s:NC.s:NE.'\<\%(block\|process\)\>' return ind + shiftwidth() endif " indent: +sw " keywords: "architecture", "configuration", "entity", "package" " removed: "component", "for", "when", "with" " where: start of previous line if prevs =~? '^\s*\%(architecture\|configuration\|entity\|package\)\>' return ind + shiftwidth() endif " indent: +sw " keyword: "select" " removed: "generate", "is", "=>" " where: end of previous line if prevs =~? s:NC.'\<select'.s:ES return ind + shiftwidth() endif " indent: +sw " keyword: "begin", "loop", "record", "units" " where: anywhere in previous line " keyword: "component", "else", "for" " where: start of previous line " keyword: "generate", "is", "then", "=>" " where: end of previous line " _note_: indent allowed to leave this filter if prevs =~? s:NC.'\%(\<begin\>\|'.s:NE.'\<\%(loop\|record\|units\)\>\)' || prevs =~? '^\s*\%(component\|else\|for\)\>' || prevs =~? s:NC.'\%('.s:NE.'\<generate\|\<\%(is\|then\)\|=>\)'.s:ES let ind = ind + shiftwidth() endif " **************************************************************************************** " indent: -sw " keywords: "when", provided previous line does not begin with "when", does not end with "is" " where: start of current line let s4 = '^\s*when\>' if curs =~? s4 if prevs =~? s:NC.'\<is'.s:ES return ind elseif prevs !~? s4 return ind - shiftwidth() else return ind2 endif endif " indent: -sw " keywords: "else", "elsif", "end" + "block", "for", "function", "generate", "if", "loop", "procedure", "process", "record", "units" " where: start of current line let s5 = 'block\|for\|function\|generate\|if\|loop\|procedure\|process\|record\|units' if curs =~? '^\s*\%(else\|elsif\|end\s\+\%('.s5.'\)\)\>' if prevs =~? '^\s*\%(elsif\|'.s5.'\)' return ind else return ind - shiftwidth() endif endif " indent: backtrace previous non-comment lines " keyword: "end" + "case", "component" " where: start of current line let m = 0 if curs =~? '^\s*end\s\+case\>' let m = 1 elseif curs =~? '^\s*end\s\+component\>' let m = 2 endif if m > 0 " find following previous non-comment line let pn = prevn let ps = getline(pn) while pn > 0 if ps !~ '^\s*--' "indent: -2sw "keywords: "end" + "case" "where: start of previous non-comment line "indent: -sw "keywords: "when" "where: start of previous non-comment line "indent: follow "keywords: "case" "where: start of previous non-comment line if m == 1 if ps =~? '^\s*end\s\+case\>' return indent(pn) - 2 * shiftwidth() elseif ps =~? '^\s*when\>' return indent(pn) - shiftwidth() elseif ps =~? '^\s*case\>' return indent(pn) endif "indent: follow "keyword: "component" "where: start of previous non-comment line elseif m == 2 if ps =~? '^\s*component\>' return indent(pn) endif endif endif let pn = prevnonblank(pn - 1) let ps = getline(pn) endwhile return ind - shiftwidth() endif " indent: -sw " keyword: ")" " where: start of current line if curs =~ '^\s*)' return ind - shiftwidth() endif " indent: 0 " keywords: "end" + "architecture", "configuration", "entity", "package" " where: start of current line if curs =~? '^\s*end\s\+\%(architecture\|configuration\|entity\|package\)\>' return 0 endif " indent: -sw " keywords: "end" + identifier, ";" " where: start of current line "if curs =~? '^\s*end\s\+\w\+\>' if curs =~? '^\s*end\%(\s\|;'.s:ES.'\)' return ind - shiftwidth() endif " **************************************************************************************** " indent: maintain indent of previous opening statement " keywords: without "procedure", "generic", "map", "port" + ":" but not ":=" + "in", "out", "inout", "buffer", "linkage", variable & ":=" " where: start of current line if curs =~? '^\s*\%(\<\%(procedure\|generic\|map\|port\)\>.*\)\@<!\w\+\s*\w*\s*:[^=]\@=\s*\%(\%(in\|out\|inout\|buffer\|linkage\)\>\|\w\+\s\+:=\)' return ind2 endif " **************************************************************************************** " indent: maintain indent of previous opening statement, corner case which " does not end in ;, but is part of a mapping " keywords: without "procedure", "generic", "map", "port" + ":" but not ":=", never + ;$ and " prevline without "procedure", "generic", "map", "port" + ":" but not ":=" + eventually ;$ " where: start of current line if curs =~? '^\s*\%(\<\%(procedure\|generic\|map\|port\)\>.*\)\@<!\w\+\s*\w*\s*:[^=].*[^;].*$' if prevs =~? '^\s*\%(\<\%(procedure\|generic\|map\|port\)\>.*\)\@<!\w\+\s*\w*\s*:[^=].*;.*$' return ind2 endif endif " return leftover filtered indent return ind endfunction