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verilog.vim
" Language: Verilog HDL " Maintainer: Chih-Tsun Huang <cthuang@cs.nthu.edu.tw> " Last Change: 2017 Aug 25 by Chih-Tsun Huang " URL: http://www.cs.nthu.edu.tw/~cthuang/vim/indent/verilog.vim " " Credits: " Suggestions for improvement, bug reports by " Takuya Fujiwara <tyru.exe@gmail.com> " Thilo Six <debian@Xk2c.de> " Leo Butlero <lbutler@brocade.com> " " Buffer Variables: " b:verilog_indent_modules : indenting after the declaration " of module blocks " b:verilog_indent_width : indenting width " b:verilog_indent_verbose : verbose to each indenting " " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 setlocal indentexpr=GetVerilogIndent() setlocal indentkeys=!^F,o,O,0),=begin,=end,=join,=endcase setlocal indentkeys+==endmodule,=endfunction,=endtask,=endspecify setlocal indentkeys+==endconfig,=endgenerate,=endprimitive,=endtable setlocal indentkeys+==`else,=`elsif,=`endif " Only define the function once. if exists("*GetVerilogIndent") finish endif let s:cpo_save = &cpo set cpo&vim function GetVerilogIndent() if exists('b:verilog_indent_width') let offset = b:verilog_indent_width else let offset = shiftwidth() endif if exists('b:verilog_indent_modules') let indent_modules = offset else let indent_modules = 0 endif " Find a non-blank line above the current line. let lnum = prevnonblank(v:lnum - 1) " At the start of the file use zero indent. if lnum == 0 return 0 endif let lnum2 = prevnonblank(lnum - 1) let curr_line = getline(v:lnum) let last_line = getline(lnum) let last_line2 = getline(lnum2) let ind = indent(lnum) let ind2 = indent(lnum - 1) let offset_comment1 = 1 " Define the condition of an open statement " Exclude the match of //, /* or */ let vlog_openstat = '\(\<or\>\|\([*/]\)\@<![*(,{><+-/%^&|!=?:]\([*/]\)\@!\)' " Define the condition when the statement ends with a one-line comment let vlog_comment = '\(//.*\|/\*.*\*/\s*\)' if exists('b:verilog_indent_verbose') let vverb_str = 'INDENT VERBOSE:' let vverb = 1 else let vverb = 0 endif " Indent accoding to last line " End of multiple-line comment if last_line =~ '\*/\s*$' && last_line !~ '/\*.\{-}\*/' let ind = ind - offset_comment1 if vverb echo vverb_str "De-indent after a multiple-line comment." endif " Indent after if/else/for/case/always/initial/specify/fork blocks " Note: We exclude '`if' or '`else' and consider 'end else' " 'end if' is redundant here elseif last_line =~ '^\s*\(end\)\=\s*`\@<!\<\(if\|else\)\>' || \ last_line =~ '^\s*\<\(for\|case\%[[zx]]\)\>' || \ last_line =~ '^\s*\<\(always\|initial\)\>' || \ last_line =~ '^\s*\<\(specify\|fork\)\>' if last_line !~ '\(;\|\<end\>\)\s*' . vlog_comment . '*$' || \ last_line =~ '\(//\|/\*\).*\(;\|\<end\>\)\s*' . vlog_comment . '*$' let ind = ind + offset if vverb | echo vverb_str "Indent after a block statement." | endif endif " Indent after function/task/config/generate/primitive/table blocks elseif last_line =~ '^\s*\<\(function\|task\|config\|generate\|primitive\|table\)\>' if last_line !~ '\<end\>\s*' . vlog_comment . '*$' || \ last_line =~ '\(//\|/\*\).*\(;\|\<end\>\)\s*' . vlog_comment . '*$' let ind = ind + offset if vverb echo vverb_str "Indent after function/task block statement." endif endif " Indent after module/function/task/specify/fork blocks elseif last_line =~ '^\s*\<module\>' let ind = ind + indent_modules if vverb && indent_modules echo vverb_str "Indent after module statement." endif if last_line =~ '[(,]\s*' . vlog_comment . '*$' && \ last_line !~ '\(//\|/\*\).*[(,]\s*' . vlog_comment . '*$' let ind = ind + offset if vverb echo vverb_str "Indent after a multiple-line module statement." endif endif " Indent after a 'begin' statement elseif last_line =~ '\(\<begin\>\)\(\s*:\s*\w\+\)*' . vlog_comment . '*$' && \ last_line !~ '\(//\|/\*\).*\(\<begin\>\)' && \ ( last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$' || \ last_line2 =~ '^\s*[^=!]\+\s*:\s*' . vlog_comment . '*$' ) let ind = ind + offset if vverb | echo vverb_str "Indent after begin statement." | endif " De-indent for the end of one-line block elseif ( last_line !~ '\<begin\>' || \ last_line =~ '\(//\|/\*\).*\<begin\>' ) && \ last_line2 =~ '\<\(`\@<!if\|`\@<!else\|for\|always\|initial\)\>.*' . \ vlog_comment . '*$' && \ last_line2 !~ \ '\(//\|/\*\).*\<\(`\@<!if\|`\@<!else\|for\|always\|initial\)\>' && \ last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$' && \ ( last_line2 !~ '\<begin\>' || \ last_line2 =~ '\(//\|/\*\).*\<begin\>' ) let ind = ind - offset if vverb echo vverb_str "De-indent after the end of one-line statement." endif " Multiple-line statement (including case statement) " Open statement " Ident the first open line elseif last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' && \ last_line !~ '\(//\|/\*\).*' . vlog_openstat . '\s*$' && \ last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$' let ind = ind + offset if vverb | echo vverb_str "Indent after an open statement." | endif " Close statement " De-indent for an optional close parenthesis and a semicolon, and only " if there exists precedent non-whitespace char elseif last_line =~ ')*\s*;\s*' . vlog_comment . '*$' && \ last_line !~ '^\s*)*\s*;\s*' . vlog_comment . '*$' && \ last_line !~ '\(//\|/\*\).*\S)*\s*;\s*' . vlog_comment . '*$' && \ ( last_line2 =~ vlog_openstat . '\s*' . vlog_comment . '*$' && \ last_line2 !~ ';\s*//.*$') && \ last_line2 !~ '^\s*' . vlog_comment . '$' let ind = ind - offset if vverb | echo vverb_str "De-indent after a close statement." | endif " `ifdef or `ifndef or `elsif or `else elseif last_line =~ '^\s*`\<\(ifn\?def\|elsif\|else\)\>' let ind = ind + offset if vverb echo vverb_str "Indent after a `ifdef or `ifndef or `elsif or `else statement." endif endif " Re-indent current line " De-indent on the end of the block " join/end/endcase/endfunction/endtask/endspecify if curr_line =~ '^\s*\<\(join\|end\|endcase\)\>' || \ curr_line =~ '^\s*\<\(endfunction\|endtask\|endspecify\)\>' || \ curr_line =~ '^\s*\<\(endconfig\|endgenerate\|endprimitive\|endtable\)\>' let ind = ind - offset if vverb | echo vverb_str "De-indent the end of a block." | endif elseif curr_line =~ '^\s*\<endmodule\>' let ind = ind - indent_modules if vverb && indent_modules echo vverb_str "De-indent the end of a module." endif " De-indent on a stand-alone 'begin' elseif curr_line =~ '^\s*\<begin\>' if last_line !~ '^\s*\<\(function\|task\|specify\|module\|config\|generate\|primitive\|table\)\>' && \ last_line !~ '^\s*\()*\s*;\|)\+\)\s*' . vlog_comment . '*$' && \ ( last_line =~ \ '\<\(`\@<!if\|`\@<!else\|for\|case\%[[zx]]\|always\|initial\)\>' || \ last_line =~ ')\s*' . vlog_comment . '*$' || \ last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' ) let ind = ind - offset if vverb echo vverb_str "De-indent a stand alone begin statement." endif endif " De-indent after the end of multiple-line statement elseif curr_line =~ '^\s*)' && \ ( last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' || \ last_line !~ vlog_openstat . '\s*' . vlog_comment . '*$' && \ last_line2 =~ vlog_openstat . '\s*' . vlog_comment . '*$' ) let ind = ind - offset if vverb echo vverb_str "De-indent the end of a multiple statement." endif " De-indent `elsif or `else or `endif elseif curr_line =~ '^\s*`\<\(elsif\|else\|endif\)\>' let ind = ind - offset if vverb | echo vverb_str "De-indent `elsif or `else or `endif statement." | endif endif " Return the indention return ind endfunction let &cpo = s:cpo_save unlet s:cpo_save " vim:sw=2
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