home *** CD-ROM | disk | FTP | other *** search
- " Vim indent file
- " Language: Fortran95 (and Fortran90, Fortran77, F and elf90)
- " Version: 0.40
- " Last Change: 2011 Dec. 28
- " Maintainer: Ajit J. Thakkar <ajit@unb.ca>; <http://www.unb.ca/chem/ajit/>
- " Usage: Do :help fortran-indent from Vim
-
- " Only load this indent file when no other was loaded.
- if exists("b:did_indent")
- finish
- endif
- let b:did_indent = 1
-
- let s:cposet=&cpoptions
- set cpoptions&vim
-
- setlocal indentkeys+==~end,=~case,=~if,=~else,=~do,=~where,=~elsewhere,=~select
- setlocal indentkeys+==~endif,=~enddo,=~endwhere,=~endselect,=~elseif
- setlocal indentkeys+==~type,=~interface,=~forall,=~associate,=~block,=~enum
- setlocal indentkeys+==~endforall,=~endassociate,=~endblock,=~endenum
- if exists("b:fortran_indent_more") || exists("g:fortran_indent_more")
- setlocal indentkeys+==~function,=~subroutine,=~module,=~contains,=~program
- setlocal indentkeys+==~endfunction,=~endsubroutine,=~endmodule
- setlocal indentkeys+==~endprogram
- endif
-
- " Determine whether this is a fixed or free format source file
- " if this hasn't been done yet
- if !exists("b:fortran_fixed_source")
- if exists("fortran_free_source")
- " User guarantees free source form
- let b:fortran_fixed_source = 0
- elseif exists("fortran_fixed_source")
- " User guarantees fixed source form
- let b:fortran_fixed_source = 1
- else
- " f90 and f95 allow both fixed and free source form
- " assume fixed source form unless signs of free source form
- " are detected in the first five columns of the first 250 lines
- " Detection becomes more accurate and time-consuming if more lines
- " are checked. Increase the limit below if you keep lots of comments at
- " the very top of each file and you have a fast computer
- let s:lmax = 500
- if ( s:lmax > line("$") )
- let s:lmax = line("$")
- endif
- let b:fortran_fixed_source = 1
- let s:ln=1
- while s:ln <= s:lmax
- let s:test = strpart(getline(s:ln),0,5)
- if s:test !~ '^[Cc*]' && s:test !~ '^ *[!#]' && s:test =~ '[^ 0-9\t]' && s:test !~ '^[ 0-9]*\t'
- let b:fortran_fixed_source = 0
- break
- endif
- let s:ln = s:ln + 1
- endwhile
- endif
- endif
-
- " Define the appropriate indent function but only once
- if (b:fortran_fixed_source == 1)
- setlocal indentexpr=FortranGetFixedIndent()
- if exists("*FortranGetFixedIndent")
- finish
- endif
- else
- setlocal indentexpr=FortranGetFreeIndent()
- if exists("*FortranGetFreeIndent")
- finish
- endif
- endif
-
- function FortranGetIndent(lnum)
- let ind = indent(a:lnum)
- let prevline=getline(a:lnum)
- " Strip tail comment
- let prevstat=substitute(prevline, '!.*$', '', '')
- let prev2line=getline(a:lnum-1)
- let prev2stat=substitute(prev2line, '!.*$', '', '')
-
- "Indent do loops only if they are all guaranteed to be of do/end do type
- if exists("b:fortran_do_enddo") || exists("g:fortran_do_enddo")
- if prevstat =~? '^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*do\>'
- let ind = ind + &sw
- endif
- if getline(v:lnum) =~? '^\s*\(\d\+\s\)\=\s*end\s*do\>'
- let ind = ind - &sw
- endif
- endif
-
- "Add a shiftwidth to statements following if, else, else if, case,
- "where, else where, forall, type, interface and associate statements
- if prevstat =~? '^\s*\(case\|else\|else\s*if\|else\s*where\)\>'
- \ ||prevstat=~? '^\s*\(type\|interface\|associate\|enum\)\>'
- \ ||prevstat=~?'^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*\(forall\|where\|block\)\>'
- \ ||prevstat=~? '^\s*\(\d\+\s\)\=\s*\(\a\w*\s*:\)\=\s*if\>'
- let ind = ind + &sw
- " Remove unwanted indent after logical and arithmetic ifs
- if prevstat =~? '\<if\>' && prevstat !~? '\<then\>'
- let ind = ind - &sw
- endif
- " Remove unwanted indent after type( statements
- if prevstat =~? '^\s*type\s*('
- let ind = ind - &sw
- endif
- endif
-
- "Indent program units unless instructed otherwise
- if !exists("b:fortran_indent_less") && !exists("g:fortran_indent_less")
- let prefix='\(\(pure\|impure\|elemental\|recursive\)\s\+\)\{,2}'
- let type='\(\(integer\|real\|double\s\+precision\|complex\|logical'
- \.'\|character\|type\|class\)\s*\S*\s\+\)\='
- if prevstat =~? '^\s*\(module\|contains\|program\)\>'
- \ ||prevstat =~? '^\s*'.prefix.'subroutine\>'
- \ ||prevstat =~? '^\s*'.prefix.type.'function\>'
- \ ||prevstat =~? '^\s*'.type.prefix.'function\>'
- let ind = ind + &sw
- endif
- if getline(v:lnum) =~? '^\s*contains\>'
- \ ||getline(v:lnum)=~? '^\s*end\s*'
- \ .'\(function\|subroutine\|module\|program\)\>'
- let ind = ind - &sw
- endif
- endif
-
- "Subtract a shiftwidth from else, else if, elsewhere, case, end if,
- " end where, end select, end forall, end interface, end associate,
- " end enum, and end type statements
- if getline(v:lnum) =~? '^\s*\(\d\+\s\)\=\s*'
- \. '\(else\|else\s*if\|else\s*where\|case\|'
- \. 'end\s*\(if\|where\|select\|interface\|'
- \. 'type\|forall\|associate\|enum\)\)\>'
- let ind = ind - &sw
- " Fix indent for case statement immediately after select
- if prevstat =~? '\<select\s\+\(case\|type\)\>'
- let ind = ind + &sw
- endif
- endif
-
- "First continuation line
- if prevstat =~ '&\s*$' && prev2stat !~ '&\s*$'
- let ind = ind + &sw
- endif
- "Line after last continuation line
- if prevstat !~ '&\s*$' && prev2stat =~ '&\s*$'
- let ind = ind - &sw
- endif
-
- return ind
- endfunction
-
- function FortranGetFreeIndent()
- "Find the previous non-blank line
- let lnum = prevnonblank(v:lnum - 1)
-
- "Use zero indent at the top of the file
- if lnum == 0
- return 0
- endif
-
- let ind=FortranGetIndent(lnum)
- return ind
- endfunction
-
- function FortranGetFixedIndent()
- let currline=getline(v:lnum)
- "Don't indent comments, continuation lines and labelled lines
- if strpart(currline,0,6) =~ '[^ \t]'
- let ind = indent(v:lnum)
- return ind
- endif
-
- "Find the previous line which is not blank, not a comment,
- "not a continuation line, and does not have a label
- let lnum = v:lnum - 1
- while lnum > 0
- let prevline=getline(lnum)
- if (prevline =~ "^[C*!]") || (prevline =~ "^\s*$")
- \ || (strpart(prevline,5,1) !~ "[ 0]")
- " Skip comments, blank lines and continuation lines
- let lnum = lnum - 1
- else
- let test=strpart(prevline,0,5)
- if test =~ "[0-9]"
- " Skip lines with statement numbers
- let lnum = lnum - 1
- else
- break
- endif
- endif
- endwhile
-
- "First line must begin at column 7
- if lnum == 0
- return 6
- endif
-
- let ind=FortranGetIndent(lnum)
- return ind
- endfunction
-
- let &cpoptions=s:cposet
- unlet s:cposet
-
- " vim:sw=2 tw=130
-