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indent_pir.vim
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indent_pir.vim
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" Description: PIR indenter
" Author: Andrew Rodland <arodland@entermail.net>
" Maintainer: Jimmy Zhuo <zhuomingliang@yahoo.com.cn>
" Last Change: 2009 Jan 16
" As usual, we want to be alone
if exists("b:did_indent")
finish
endif
let b:did_indent=1
setlocal indentexpr=PIRIndent()
setlocal indentkeys=o,O,*<Return>,<bs>,:,=.end,0#
fun! InPOD(lnum)
return synIDattr(synID(a:lnum, 1, 1), "name") =~? '^myPod$\|^pod[A-Z]'
endfun
fun! PIRIndent()
let thisline = getline(v:lnum)
let POD_START = '^=[a-z]'
if thisline =~? POD_START
return 0
endif
if InPOD(v:lnum)
return -1
endif
let COMMENT = '^#'
if thisline =~? COMMENT
return 0
endif
let lnum=v:lnum
while lnum > 0
let lnum = prevnonblank(lnum-1)
let prevline = getline(lnum)
if prevline !~? COMMENT
if !InPOD(lnum)
break
endif
endif
endwhile
if lnum < 1
return 0
endif
let ind = indent(lnum)
let SUB = '^\s*\.pcc_sub\s\+\|^\s*\.sub\s\+\|^\s*\.macro\s\+'
let RETURNBLOCK = '\s*\.begin_return\s*$'
let END = '^\s*\.end\s*$\|^\s*\.end_return\s*\|^\s*\.endm$'
let LABEL = '^\s*\k\+:'
if prevline =~? SUB
let ind = ind + &sw
endif
if prevline =~? RETURNBLOCK
let ind = ind + &sw
endif
if prevline =~? LABEL
let ind = ind + 2
endif
if thisline =~? END
let ind = ind - &sw
endif
if thisline =~? LABEL
let ind = ind - 2
endif
return ind
endfun