home *** CD-ROM | disk | FTP | other *** search
- " Vim indent file
- " Language: Verilog HDL
- " Maintainer: Chih-Tsun Huang <cthuang@larc.ee.nthu.edu.tw>
- " Last Change: Wed Aug 1 21:08:17 CST 2001
- " URL: http://larc.ee.nthu.edu.tw/~cthuang/vim/indent/verilog.vim
- "
- " Buffer Variables:
- " b:verilog_indent_modules : indenting after the declaration
- " of module blocks
- " b:verilog_indent_width : indenting width
- "
-
- " 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
-
- " Indent accoding to last line
- " End of multiple-line comment
- if last_line =~ '\*/\s*$'
- let ind = ind - offset_comment1
-
- " 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*$'
- let ind = ind + offset
- endif
- " Indent after function/task blocks
- elseif last_line =~ '^\s*\<\(function\|task\)\>'
- if last_line !~ '\<end\>\s*$'
- let ind = ind + offset
- endif
-
- " Indent after each condition in case block
- elseif last_line =~
- \ '^\s*\(default\|[a-zA-Z0-9_]\+\|[0-9]\+.[dDhHbBoO][0-9a-fA-F_xXzZ?]\+\)\s*[,:]'
- if last_line !~ '\(;\|\<end\>\|,\)\s*$'
- let ind = ind + offset
- endif
-
- " Indent after module/function/task/specify/fork blocks
- elseif last_line =~ '^\s*\<module\>'
- let ind = ind + indent_modules
- if last_line =~ '[(,]\s*$'
- let ind = ind + offset
- endif
-
- " Indent after a 'begin' statement
- elseif last_line =~ '\(\<begin\>\)\(\s*:\s*\w\+\)*$'
- let ind = ind + offset
-
- " De-indent for the end of one-line block
- elseif last_line !~ '\<begin\>' &&
- \ last_line2 =~ '^\s*\<\(if\|else\|for\|always\|initial\)\>' &&
- \ last_line2 !~ '\(\<or\>\|[*(,{><+-/%^&|!=?:]\)\s*$' &&
- \ last_line2 !~ '\<begin\>'
- let ind = ind - offset
-
- " Multiple-line statement
- " Open statement
- elseif last_line =~ '[*(,{><+-/%^&|!=?:]\s*$' &&
- \ last_line2 !~ '[*(,{><+-/%^&|!=?:]\s*$'
- let ind = ind + offset
- " Close statement
- elseif last_line =~ '\();\|;\|)\)\s*$' &&
- \ last_line !~ '^\s*\();\|;\|)\)\s*$' &&
- \ last_line2 =~ '\(\<or\>\|[*(,{><+-/%^&|!=?:]\)\s*$' &&
- \ last_line2 !~ '\(//\|\*/\)\s*$'
- let ind = ind - offset
-
- " `ifdef and `else
- elseif last_line =~ '^\s*`\<\(ifdef\|else\)\>'
- let ind = ind + offset
-
- 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
- elseif curr_line =~ '^\s*\<endmodule\>'
- let ind = ind - indent_modules
- " De-indent on a stand-alone 'begin'
- elseif curr_line =~ '^\s*\<begin\>'
- if last_line =~ '\<\(if\|else\|for\|case\%[[zx]]\|always\|initial\)\>' ||
- \ last_line =~
- \ '^\s*\(default\|[a-zA-Z0-9_]\+\|[0-9]\+.[dDhHbBoO][0-9a-fA-F_xXzZ?]\+\)\s*:'
- let ind = ind - offset
- endif
-
- " De-indent after the end of multiple-line statement
- elseif curr_line =~ '^\s*)' && last_line !~ ')\s*$'
- let ind = ind - offset
-
- " De-indent `else and `endif
- elseif curr_line =~ '^\s*`\<\(else\|endif\)\>'
- let ind = ind - offset
-
- endif
-
- " Return the indention
- return ind
- endfunction
-
- " vim:sw=2
-