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- " 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
-