1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
" Language: Verilog HDL
" Maintainer: Chih-Tsun Huang <cthuang@cs.nthu.edu.tw>
" Last Change: 2017 Aug 25 by Chih-Tsun Huang
" 2023 Aug 28 by Vim Project (undo_indent)
" URL: http://www.cs.nthu.edu.tw/~cthuang/vim/indent/verilog.vim
"
" Credits:
" Suggestions for improvement, bug reports by
" Takuya Fujiwara <tyru.exe@gmail.com>
" Thilo Six <debian@Xk2c.de>
" Leo Butlero <lbutler@brocade.com>
"
" Buffer Variables:
" b:verilog_indent_modules : indenting after the declaration
" of module blocks
" b:verilog_indent_width : indenting width
" b:verilog_indent_verbose : verbose to each indenting
"
" 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+==endconfig,=endgenerate,=endprimitive,=endtable
setlocal indentkeys+==`else,=`elsif,=`endif
let b:undo_indent = "setlocal indentexpr< indentkeys<"
" Only define the function once.
if exists("*GetVerilogIndent")
finish
endif
let s:cpo_save = &cpo
set cpo&vim
function GetVerilogIndent()
if exists('b:verilog_indent_width')
let offset = b:verilog_indent_width
else
let offset = shiftwidth()
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
" Define the condition of an open statement
" Exclude the match of //, /* or */
let vlog_openstat = '\(\<or\>\|\([*/]\)\@<![*(,{><+-/%^&|!=?:]\([*/]\)\@!\)'
" Define the condition when the statement ends with a one-line comment
let vlog_comment = '\(//.*\|/\*.*\*/\s*\)'
if exists('b:verilog_indent_verbose')
let vverb_str = 'INDENT VERBOSE:'
let vverb = 1
else
let vverb = 0
endif
" Indent according to last line
" End of multiple-line comment
if last_line =~ '\*/\s*$' && last_line !~ '/\*.\{-}\*/'
let ind = ind - offset_comment1
if vverb
echo vverb_str "De-indent after a multiple-line comment."
endif
" Indent after if/else/for/case/always/initial/specify/fork blocks
" Note: We exclude '`if' or '`else' and consider 'end else'
" 'end if' is redundant here
elseif last_line =~ '^\s*\(end\)\=\s*`\@<!\<\(if\|else\)\>' ||
\ last_line =~ '^\s*\<\(for\|case\%[[zx]]\)\>' ||
\ last_line =~ '^\s*\<\(always\|initial\)\>' ||
\ last_line =~ '^\s*\<\(specify\|fork\)\>'
if last_line !~ '\(;\|\<end\>\)\s*' . vlog_comment . '*$' ||
\ last_line =~ '\(//\|/\*\).*\(;\|\<end\>\)\s*' . vlog_comment . '*$'
let ind = ind + offset
if vverb | echo vverb_str "Indent after a block statement." | endif
endif
" Indent after function/task/config/generate/primitive/table blocks
elseif last_line =~ '^\s*\<\(function\|task\|config\|generate\|primitive\|table\)\>'
if last_line !~ '\<end\>\s*' . vlog_comment . '*$' ||
\ last_line =~ '\(//\|/\*\).*\(;\|\<end\>\)\s*' . vlog_comment . '*$'
let ind = ind + offset
if vverb
echo vverb_str "Indent after function/task block statement."
endif
endif
" Indent after module/function/task/specify/fork blocks
elseif last_line =~ '^\s*\<module\>'
let ind = ind + indent_modules
if vverb && indent_modules
echo vverb_str "Indent after module statement."
endif
if last_line =~ '[(,]\s*' . vlog_comment . '*$' &&
\ last_line !~ '\(//\|/\*\).*[(,]\s*' . vlog_comment . '*$'
let ind = ind + offset
if vverb
echo vverb_str "Indent after a multiple-line module statement."
endif
endif
" Indent after a 'begin' statement
elseif last_line =~ '\(\<begin\>\)\(\s*:\s*\w\+\)*' . vlog_comment . '*$' &&
\ last_line !~ '\(//\|/\*\).*\(\<begin\>\)' &&
\ ( last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$' ||
\ last_line2 =~ '^\s*[^=!]\+\s*:\s*' . vlog_comment . '*$' )
let ind = ind + offset
if vverb | echo vverb_str "Indent after begin statement." | endif
" De-indent for the end of one-line block
elseif ( last_line !~ '\<begin\>' ||
\ last_line =~ '\(//\|/\*\).*\<begin\>' ) &&
\ last_line2 =~ '\<\(`\@<!if\|`\@<!else\|for\|always\|initial\)\>.*' .
\ vlog_comment . '*$' &&
\ last_line2 !~
\ '\(//\|/\*\).*\<\(`\@<!if\|`\@<!else\|for\|always\|initial\)\>' &&
\ last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$' &&
\ ( last_line2 !~ '\<begin\>' ||
\ last_line2 =~ '\(//\|/\*\).*\<begin\>' )
let ind = ind - offset
if vverb
echo vverb_str "De-indent after the end of one-line statement."
endif
" Multiple-line statement (including case statement)
" Open statement
" Ident the first open line
elseif last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' &&
\ last_line !~ '\(//\|/\*\).*' . vlog_openstat . '\s*$' &&
\ last_line2 !~ vlog_openstat . '\s*' . vlog_comment . '*$'
let ind = ind + offset
if vverb | echo vverb_str "Indent after an open statement." | endif
" Close statement
" De-indent for an optional close parenthesis and a semicolon, and only
" if there exists precedent non-whitespace char
elseif last_line =~ ')*\s*;\s*' . vlog_comment . '*$' &&
\ last_line !~ '^\s*)*\s*;\s*' . vlog_comment . '*$' &&
\ last_line !~ '\(//\|/\*\).*\S)*\s*;\s*' . vlog_comment . '*$' &&
\ ( last_line2 =~ vlog_openstat . '\s*' . vlog_comment . '*$' &&
\ last_line2 !~ ';\s*//.*$') &&
\ last_line2 !~ '^\s*' . vlog_comment . '$'
let ind = ind - offset
if vverb | echo vverb_str "De-indent after a close statement." | endif
" `ifdef or `ifndef or `elsif or `else
elseif last_line =~ '^\s*`\<\(ifn\?def\|elsif\|else\)\>'
let ind = ind + offset
if vverb
echo vverb_str "Indent after a `ifdef or `ifndef or `elsif or `else statement."
endif
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*\<\(endfunction\|endtask\|endspecify\)\>' ||
\ curr_line =~ '^\s*\<\(endconfig\|endgenerate\|endprimitive\|endtable\)\>'
let ind = ind - offset
if vverb | echo vverb_str "De-indent the end of a block." | endif
elseif curr_line =~ '^\s*\<endmodule\>'
let ind = ind - indent_modules
if vverb && indent_modules
echo vverb_str "De-indent the end of a module."
endif
" De-indent on a stand-alone 'begin'
elseif curr_line =~ '^\s*\<begin\>'
if last_line !~ '^\s*\<\(function\|task\|specify\|module\|config\|generate\|primitive\|table\)\>' &&
\ last_line !~ '^\s*\()*\s*;\|)\+\)\s*' . vlog_comment . '*$' &&
\ ( last_line =~
\ '\<\(`\@<!if\|`\@<!else\|for\|case\%[[zx]]\|always\|initial\)\>' ||
\ last_line =~ ')\s*' . vlog_comment . '*$' ||
\ last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' )
let ind = ind - offset
if vverb
echo vverb_str "De-indent a stand alone begin statement."
endif
endif
" De-indent after the end of multiple-line statement
elseif curr_line =~ '^\s*)' &&
\ ( last_line =~ vlog_openstat . '\s*' . vlog_comment . '*$' ||
\ last_line !~ vlog_openstat . '\s*' . vlog_comment . '*$' &&
\ last_line2 =~ vlog_openstat . '\s*' . vlog_comment . '*$' )
let ind = ind - offset
if vverb
echo vverb_str "De-indent the end of a multiple statement."
endif
" De-indent `elsif or `else or `endif
elseif curr_line =~ '^\s*`\<\(elsif\|else\|endif\)\>'
let ind = ind - offset
if vverb | echo vverb_str "De-indent `elsif or `else or `endif statement." | endif
endif
" Return the indentation
return ind
endfunction
let &cpo = s:cpo_save
unlet s:cpo_save
" vim:sw=2
|
