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-rw-r--r--runtime/indent/ld.vim87
1 files changed, 87 insertions, 0 deletions
diff --git a/runtime/indent/ld.vim b/runtime/indent/ld.vim
new file mode 100644
index 0000000..ddf003e
--- /dev/null
+++ b/runtime/indent/ld.vim
@@ -0,0 +1,87 @@
+" Vim indent file
+" Language: ld(1) script
+" Maintainer: Doug Kearns <dougkearns@gmail.com>
+" Previous Maintainer: Nikolai Weibull <now@bitwi.se>
+" Last Change: 24 Sep 2021
+
+if exists("b:did_indent")
+ finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=GetLDIndent()
+setlocal indentkeys=0{,0},!^F,o,O
+setlocal nosmartindent
+
+let b:undo_indent = "setl inde< indk< si<"
+
+if exists("*GetLDIndent")
+ finish
+endif
+
+function s:prevnonblanknoncomment(lnum)
+ let lnum = a:lnum
+ while lnum > 1
+ let lnum = prevnonblank(lnum)
+ let line = getline(lnum)
+ if line =~ '\*/'
+ while lnum > 1 && line !~ '/\*'
+ let lnum -= 1
+ endwhile
+ if line =~ '^\s*/\*'
+ let lnum -= 1
+ else
+ break
+ endif
+ else
+ break
+ endif
+ endwhile
+ return lnum
+endfunction
+
+function s:count_braces(lnum, count_open)
+ let n_open = 0
+ let n_close = 0
+ let line = getline(a:lnum)
+ let pattern = '[{}]'
+ let i = match(line, pattern)
+ while i != -1
+ if synIDattr(synID(a:lnum, i + 1, 0), 'name') !~ 'ld\%(Comment\|String\)'
+ if line[i] == '{'
+ let n_open += 1
+ elseif line[i] == '}'
+ if n_open > 0
+ let n_open -= 1
+ else
+ let n_close += 1
+ endif
+ endif
+ endif
+ let i = match(line, pattern, i + 1)
+ endwhile
+ return a:count_open ? n_open : n_close
+endfunction
+
+function GetLDIndent()
+ let line = getline(v:lnum)
+ if line =~ '^\s*\*'
+ return cindent(v:lnum)
+ elseif line =~ '^\s*}'
+ return indent(v:lnum) - shiftwidth()
+ endif
+
+ let pnum = s:prevnonblanknoncomment(v:lnum - 1)
+ if pnum == 0
+ return 0
+ endif
+
+ let ind = indent(pnum) + s:count_braces(pnum, 1) * shiftwidth()
+
+ let pline = getline(pnum)
+ if pline =~ '}\s*$'
+ let ind -= (s:count_braces(pnum, 0) - (pline =~ '^\s*}' ? 1 : 0)) * shiftwidth()
+ endif
+
+ return ind
+endfunction