--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/runtime/indent/sqlanywhere.vim	Sat Nov 10 15:07:22 2007 +0900
@@ -0,0 +1,384 @@
+" Vim indent file
+" Language:    SQL
+" Maintainer:  David Fishburn <fishburn at ianywhere dot com>
+" Last Change: Wed Sep 14 2005 10:21:15 PM
+" Version:     1.4
+" Download:    http://vim.sourceforge.net/script.php?script_id=495
+
+" Notes:
+"    Indenting keywords are based on Oracle and Sybase Adaptive Server
+"    Anywhere (ASA).  Test indenting was done with ASA stored procedures and
+"    fuctions and Oracle packages which contain stored procedures and
+"    functions.
+"    This has not been tested against Microsoft SQL Server or
+"    Sybase Adaptive Server Enterprise (ASE) which use the Transact-SQL
+"    syntax.  That syntax does not have end tags for IF's, which makes
+"    indenting more difficult.
+"
+" Known Issues:
+"    The Oracle MERGE statement does not have an end tag associated with
+"    it, this can leave the indent hanging to the right one too many.
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+    finish
+endif
+let b:did_indent     = 1
+let b:current_indent = "sqlanywhere"
+
+setlocal indentkeys-=0{
+setlocal indentkeys-=0}
+setlocal indentkeys-=:
+setlocal indentkeys-=0#
+setlocal indentkeys-=e
+
+" This indicates formatting should take place when one of these
+" expressions is used.  These expressions would normally be something
+" you would type at the BEGINNING of a line
+" SQL is generally case insensitive, so this files assumes that
+" These keywords are something that would trigger an indent LEFT, not
+" an indent right, since the SQLBlockStart is used for those keywords
+setlocal indentkeys+==~end,=~else,=~elseif,=~elsif,0=~when,0=)
+
+" GetSQLIndent is executed whenever one of the expressions
+" in the indentkeys is typed
+setlocal indentexpr=GetSQLIndent()
+
+" Only define the functions once.
+if exists("*GetSQLIndent")
+    finish
+endif
+
+" List of all the statements that start a new block.
+" These are typically words that start a line.
+" IS is excluded, since it is difficult to determine when the
+" ending block is (especially for procedures/functions).
+let s:SQLBlockStart = '^\s*\%('.
+            \ 'if\|else\|elseif\|elsif\|'.
+                \ 'while\|loop\|do\|'.
+                \ 'begin\|'.
+                \ 'case\|when\|merge\|exception'.
+                \ '\)\>'
+let s:SQLBlockEnd = '^\s*\(end\)\>'
+
+" The indent level is also based on unmatched paranethesis
+" If a line has an extra "(" increase the indent
+" If a line has an extra ")" decrease the indent
+function s:CountUnbalancedParan( line, paran_to_check )
+    let l = a:line
+    let lp = substitute(l, '[^(]', '', 'g')
+    let l = a:line
+    let rp = substitute(l, '[^)]', '', 'g')
+
+    if a:paran_to_check =~ ')'
+        " echom 'CountUnbalancedParan ) returning: ' .
+        " \ (strlen(rp) - strlen(lp))
+        return (strlen(rp) - strlen(lp))
+    elseif a:paran_to_check =~ '('
+        " echom 'CountUnbalancedParan ( returning: ' .
+        " \ (strlen(lp) - strlen(rp))
+        return (strlen(lp) - strlen(rp))
+    else
+        " echom 'CountUnbalancedParan unknown paran to check: ' .
+        " \ a:paran_to_check
+        return 0
+    endif
+endfunction
+
+" Unindent commands based on previous indent level
+function s:CheckToIgnoreRightParan( prev_lnum, num_levels )
+    let lnum = a:prev_lnum
+    let line = getline(lnum)
+    let ends = 0
+    let num_right_paran = a:num_levels
+    let ignore_paran = 0
+    let vircol = 1
+
+    while num_right_paran > 0
+        silent! exec 'norm! '.lnum."G\<bar>".vircol."\<bar>"
+        let right_paran = search( ')', 'W' )
+        if right_paran != lnum
+            " This should not happen since there should be at least
+            " num_right_paran matches for this line
+            break
+        endif
+        let vircol      = virtcol(".")
+
+        " if getline(".") =~ '^)'
+        let matching_paran = searchpair('(', '', ')', 'bW',
+                    \ 'IsColComment(line("."), col("."))')
+
+        if matching_paran < 1
+            " No match found
+            " echom 'CTIRP - no match found, ignoring'
+            break
+        endif
+
+        if matching_paran == lnum
+            " This was not an unmatched parantenses, start the search again
+            " again after this column
+            " echom 'CTIRP - same line match, ignoring'
+            continue
+        endif
+
+        " echom 'CTIRP - match: ' . line(".") . '  ' . getline(".")
+
+        if getline(matching_paran) =~? '\(if\|while\)\>'
+            " echom 'CTIRP - if/while ignored: ' . line(".") . '  ' . getline(".")
+            let ignore_paran = ignore_paran + 1
+        endif
+
+        " One match found, decrease and check for further matches
+        let num_right_paran = num_right_paran - 1
+
+    endwhile
+
+    " Fallback - just move back one
+    " return a:prev_indent - &sw
+    return ignore_paran
+endfunction
+
+" Based on the keyword provided, loop through previous non empty
+" non comment lines to find the statement that initated the keyword.
+" Return its indent level
+"    CASE ..
+"    WHEN ...
+" Should return indent level of CASE
+"    EXCEPTION ..
+"    WHEN ...
+"         something;
+"    WHEN ...
+" Should return indent level of exception.
+function s:GetStmtStarterIndent( keyword, curr_lnum )
+    let lnum  = a:curr_lnum
+
+    " Default - reduce indent by 1
+    let ind = indent(a:curr_lnum) - &sw
+
+    if a:keyword =~? 'end'
+        exec 'normal! ^'
+        let stmts = '^\s*\%('.
+                    \ '\<begin\>\|' .
+                    \ '\%(\%(\<end\s\+\)\@<!\<loop\>\)\|' .
+                    \ '\%(\%(\<end\s\+\)\@<!\<case\>\)\|' .
+                    \ '\%(\%(\<end\s\+\)\@<!\<for\>\)\|' .
+                    \ '\%(\%(\<end\s\+\)\@<!\<if\>\)'.
+                    \ '\)'
+        let matching_lnum = searchpair(stmts, '', '\<end\>\zs', 'bW',
+                    \ 'IsColComment(line("."), col(".")) == 1')
+        exec 'normal! $'
+        if matching_lnum > 0 && matching_lnum < a:curr_lnum
+            let ind = indent(matching_lnum)
+        endif
+    elseif a:keyword =~? 'when'
+        exec 'normal! ^'
+        let matching_lnum = searchpair(
+                    \ '\%(\<end\s\+\)\@<!\<case\>\|\<exception\>\|\<merge\>',
+                    \ '',
+                    \ '\%(\%(\<when\s\+others\>\)\|\%(\<end\s\+case\>\)\)',
+                    \ 'bW',
+                    \ 'IsColComment(line("."), col(".")) == 1')
+        exec 'normal! $'
+        if matching_lnum > 0 && matching_lnum < a:curr_lnum
+            let ind = indent(matching_lnum)
+        else
+            let ind = indent(a:curr_lnum)
+        endif
+    endif
+
+    return ind
+endfunction
+
+
+" Check if the line is a comment
+function IsLineComment(lnum)
+    let rc = synIDattr(
+                \ synID(a:lnum,
+                \     match(getline(a:lnum), '\S')+1, 0)
+                \ , "name")
+                \ =~? "comment"
+
+    return rc
+endfunction
+
+
+" Check if the column is a comment
+function IsColComment(lnum, cnum)
+    let rc = synIDattr(synID(a:lnum, a:cnum, 0), "name")
+                \           =~? "comment"
+
+    return rc
+endfunction
+
+
+" Check if the column is a comment
+function ModuloIndent(ind)
+    let ind = a:ind
+
+    if ind > 0
+        let modulo = ind % &shiftwidth
+
+        if modulo > 0
+            let ind = ind - modulo
+        endif
+    endif
+
+    return ind
+endfunction
+
+
+" Find correct indent of a new line based upon the previous line
+function GetSQLIndent()
+    let lnum = v:lnum
+    let ind = indent(lnum)
+
+    " If the current line is a comment, leave the indent as is
+    " Comment out this additional check since it affects the
+    " indenting of =, and will not reindent comments as it should
+    " if IsLineComment(lnum) == 1
+    "     return ind
+    " endif
+
+    " while 1
+        " Get previous non-blank line
+        let prevlnum = prevnonblank(lnum - 1)
+        if prevlnum <= 0
+            return ind
+        endif
+
+        if IsLineComment(prevlnum) == 1
+            if getline(v:lnum) =~ '^\s*\*'
+                let ind = ModuloIndent(indent(prevlnum))
+                return ind + 1
+            endif
+            " If the previous line is a comment, then return -1
+            " to tell Vim to use the formatoptions setting to determine
+            " the indent to use
+            " But only if the next line is blank.  This would be true if
+            " the user is typing, but it would not be true if the user
+            " is reindenting the file
+            if getline(v:lnum) =~ '^\s*$'
+                return -1
+            endif
+        endif
+
+    "     let prevline = getline(prevlnum)
+    "     if prevline !~ '^\s*$'
+    "         " echom 'previous non blank - break: ' . prevline
+    "         break
+    "     endif
+    " endwhile
+
+    " echom 'PREVIOUS INDENT: ' . indent(prevlnum) . '  LINE: ' . getline(prevlnum)
+
+    " This is the line you just hit return on, it is not the current line
+    " which is new and empty
+    " Based on this line, we can determine how much to indent the new
+    " line
+
+    " Get default indent (from prev. line)
+    let ind      = indent(prevlnum)
+    let prevline = getline(prevlnum)
+
+    " Now check what's on the previous line to determine if the indent
+    " should be changed, for example IF, BEGIN, should increase the indent
+    " where END IF, END, should decrease the indent.
+    if prevline =~? s:SQLBlockStart
+        " Move indent in
+        let ind = ind + &sw
+        " echom 'prevl - SQLBlockStart - indent ' . ind . '  line: ' . prevline
+    elseif prevline =~ '[()]'
+        if prevline =~ '('
+            let num_unmatched_left = s:CountUnbalancedParan( prevline, '(' )
+        else
+            let num_unmatched_left = 0
+        endif
+        if prevline =~ ')'
+            let num_unmatched_right  = s:CountUnbalancedParan( prevline, ')' )
+        else
+            let num_unmatched_right  = 0
+            " let num_unmatched_right  = s:CountUnbalancedParan( prevline, ')' )
+        endif
+        if num_unmatched_left > 0
+            " There is a open left paranethesis
+            " increase indent
+            let ind = ind + ( &sw * num_unmatched_left )
+        elseif num_unmatched_right > 0
+            " if it is an unbalanced paranethesis only unindent if
+            " it was part of a command (ie create table(..)  )
+            " instead of part of an if (ie if (....) then) which should
+            " maintain the indent level
+            let ignore = s:CheckToIgnoreRightParan( prevlnum, num_unmatched_right )
+            " echom 'prevl - ) unbalanced - CTIRP - ignore: ' . ignore
+
+            if prevline =~ '^\s*)'
+                let ignore = ignore + 1
+                " echom 'prevl - begins ) unbalanced ignore: ' . ignore
+            endif
+
+            if (num_unmatched_right - ignore) > 0
+                let ind = ind - ( &sw * (num_unmatched_right - ignore) )
+            endif
+
+        endif
+    endif
+
+
+    " echom 'CURRENT INDENT: ' . ind . '  LINE: '  . getline(v:lnum)
+
+    " This is a new blank line since we just typed a carriage return
+    " Check current line; search for simplistic matching start-of-block
+    let line = getline(v:lnum)
+
+    if line =~? '^\s*els'
+        " Any line when you type else will automatically back up one
+        " ident level  (ie else, elseif, elsif)
+        let ind = ind - &sw
+        " echom 'curr - else - indent ' . ind
+    elseif line =~? '^\s*end\>'
+        let ind = s:GetStmtStarterIndent('end', v:lnum)
+        " General case for end
+        " let ind = ind - &sw
+        " echom 'curr - end - indent ' . ind
+    elseif line =~? '^\s*when\>'
+        let ind = s:GetStmtStarterIndent('when', v:lnum)
+        " If the WHEN clause is used with a MERGE or EXCEPTION
+        " clause, do not change the indent level, since these
+        " statements do not have a corresponding END statement.
+        " if stmt_starter =~? 'case'
+        "    let ind = ind - &sw
+        " endif
+        " elseif line =~ '^\s*)\s*;\?\s*$'
+        " elseif line =~ '^\s*)'
+    elseif line =~ '^\s*)'
+        let num_unmatched_right  = s:CountUnbalancedParan( line, ')' )
+        let ignore = s:CheckToIgnoreRightParan( v:lnum, num_unmatched_right )
+        " If the line ends in a ), then reduce the indent
+        " This catches items like:
+        " CREATE TABLE T1(
+        "    c1 int,
+        "    c2 int
+        "    );
+        " But we do not want to unindent a line like:
+        " IF ( c1 = 1
+        " AND  c2 = 3 ) THEN
+        " let num_unmatched_right  = s:CountUnbalancedParan( line, ')' )
+        " if num_unmatched_right > 0
+        " elseif strpart( line, strlen(line)-1, 1 ) =~ ')'
+        " let ind = ind - &sw
+        if line =~ '^\s*)'
+            " let ignore = ignore + 1
+            " echom 'curr - begins ) unbalanced ignore: ' . ignore
+        endif
+
+        if (num_unmatched_right - ignore) > 0
+            let ind = ind - ( &sw * (num_unmatched_right - ignore) )
+        endif
+        " endif
+    endif
+
+    " echom 'final - indent ' . ind
+    return ModuloIndent(ind)
+endfunction
+
+" vim:sw=4:ff=unix: