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Diffstat (limited to 'runtime/indent/verilog.vim')
| -rw-r--r-- | runtime/indent/verilog.vim | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/runtime/indent/verilog.vim b/runtime/indent/verilog.vim new file mode 100644 index 000000000..74c8c5f6d --- /dev/null +++ b/runtime/indent/verilog.vim @@ -0,0 +1,219 @@ +" Language: Verilog HDL +" Maintainer: Chih-Tsun Huang <cthuang@larc.ee.nthu.edu.tw> +" Last Change: Wed Oct 31 16:13:11 CST 2001 +" URL: http://larc.ee.nthu.edu.tw/~cthuang/vim/indent/verilog.vim +" +" Credits: +" Suggestions for improvement, bug reports by +" 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+==`else,=`endif + +" Only define the function once. +if exists("*GetVerilogIndent") + finish +endif + +set cpo-=C + +function GetVerilogIndent() + + if exists('b:verilog_indent_width') + let offset = b:verilog_indent_width + else + let offset = &sw + 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 + elseif last_line =~ '`\@<!\<\(if\|else\)\>' || + \ 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 blocks + elseif last_line =~ '^\s*\<\(function\|task\)\>' + 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 and `else + elseif last_line =~ '^\s*`\<\(ifdef\|else\)\>' + let ind = ind + offset + if vverb + echo vverb_str "Indent after a `ifdef 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*\<\(endfunction\|endtask\|endspecify\)\>' + 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*\<\(function\|task\|specify\|module\)\>' && + \ 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 `else and `endif + elseif curr_line =~ '^\s*`\<\(else\|endif\)\>' + let ind = ind - offset + if vverb | echo vverb_str "De-indent `else and `endif statement." | endif + + endif + + " Return the indention + return ind +endfunction + +" vim:sw=2 |