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1"============================================================================
2"File: c.vim
3"Description: Syntax checking plugin for syntastic.vim
4"Maintainer: Gregor Uhlenheuer <kongo2002 at gmail dot com>
5"License: This program is free software. It comes without any warranty,
6" to the extent permitted by applicable law. You can redistribute
7" it and/or modify it under the terms of the Do What The Fuck You
8" Want To Public License, Version 2, as published by Sam Hocevar.
9" See http://sam.zoy.org/wtfpl/COPYING for more details.
10"
11"============================================================================
12
13" In order to also check header files add this to your .vimrc:
14" (this usually creates a .gch file in your source directory)
15"
16" let g:syntastic_c_check_header = 1
17"
18" To disable the search of included header files after special
19" libraries like gtk and glib add this line to your .vimrc:
20"
21" let g:syntastic_c_no_include_search = 1
22"
23" To enable header files being re-checked on every file write add the
24" following line to your .vimrc. Otherwise the header files are checked only
25" one time on initially loading the file.
26" In order to force syntastic to refresh the header includes simply
27" unlet b:syntastic_c_includes. Then the header files are being re-checked on
28" the next file write.
29"
30" let g:syntastic_c_auto_refresh_includes = 1
31"
32" Alternatively you can set the buffer local variable b:syntastic_c_cflags.
33" If this variable is set for the current buffer no search for additional
34" libraries is done. I.e. set the variable like this:
35"
36" let b:syntastic_c_cflags = ' -I/usr/include/libsoup-2.4'
37"
38" In order to add some custom include directories that should be added to the
39" gcc command line you can add those to the global variable
40" g:syntastic_c_include_dirs. This list can be used like this:
41"
42" let g:syntastic_c_include_dirs = [ 'includes', 'headers' ]
43"
44" Moreover it is possible to add additional compiler options to the syntax
45" checking execution via the variable 'g:syntastic_c_compiler_options':
46"
47" let g:syntastic_c_compiler_options = ' -ansi'
48"
49" Using the global variable 'g:syntastic_c_remove_include_errors' you can
50" specify whether errors of files included via the g:syntastic_c_include_dirs'
51" setting are removed from the result set:
52"
53" let g:syntastic_c_remove_include_errors = 1
54
55if exists('loaded_c_syntax_checker')
56 finish
57endif
58let loaded_c_syntax_checker = 1
59
60if !executable('gcc')
61 finish
62endif
63
64let s:save_cpo = &cpo
65set cpo&vim
66
67" default include directories
68let s:default_includes = [ '.', '..', 'include', 'includes',
69 \ '../include', '../includes' ]
70
71" uniquify the input list
72function! s:Unique(list)
73 let l = []
74 for elem in a:list
75 if index(l, elem) == -1
76 let l = add(l, elem)
77 endif
78 endfor
79 return l
80endfunction
81
82" get the gcc include directory argument depending on the default
83" includes and the optional user-defined 'g:syntastic_c_include_dirs'
84function! s:GetIncludeDirs()
85 let include_dirs = s:default_includes
86
87 if exists('g:syntastic_c_include_dirs')
88 call extend(include_dirs, g:syntastic_c_include_dirs)
89 endif
90
91 return join(map(s:Unique(include_dirs), '"-I" . v:val'), ' ')
92endfunction
93
94function! SyntaxCheckers_c_GetLocList()
95 let makeprg = 'gcc -fsyntax-only -std=gnu99 '.shellescape(expand('%')).
96 \ ' '.s:GetIncludeDirs()
97 let errorformat = '%-G%f:%s:,%-G%f:%l: %#error: %#(Each undeclared '.
98 \ 'identifier is reported only%.%#,%-G%f:%l: %#error: %#for '.
99 \ 'each function it appears%.%#,%-GIn file included%.%#,'.
100 \ '%-G %#from %f:%l\,,%f:%l:%c: %m,%f:%l: %trror: %m,%f:%l: %m'
101
102 " determine whether to parse header files as well
103 if expand('%') =~? '.h$'
104 if exists('g:syntastic_c_check_header')
105 let makeprg = 'gcc -c '.shellescape(expand('%')).
106 \ ' '.s:GetIncludeDirs()
107 else
108 return []
109 endif
110 endif
111
112 " add optional user-defined compiler options
113 if exists('g:syntastic_c_compiler_options')
114 let makeprg .= g:syntastic_c_compiler_options
115 endif
116
117 " check if the user manually set some cflags
118 if !exists('b:syntastic_c_cflags')
119 " check whether to search for include files at all
120 if !exists('g:syntastic_c_no_include_search') ||
121 \ g:syntastic_c_no_include_search != 1
122 " refresh the include file search if desired
123 if exists('g:syntastic_c_auto_refresh_includes') &&
124 \ g:syntastic_c_auto_refresh_includes != 0
125 let makeprg .= syntastic#c#SearchHeaders()
126 else
127 " search for header includes if not cached already
128 if !exists('b:syntastic_c_includes')
129 let b:syntastic_c_includes = syntastic#c#SearchHeaders()
130 endif
131 let makeprg .= b:syntastic_c_includes
132 endif
133 endif
134 else
135 " use the user-defined cflags
136 let makeprg .= b:syntastic_c_cflags
137 endif
138
139 " process makeprg
140 let errors = SyntasticMake({ 'makeprg': makeprg,
141 \ 'errorformat': errorformat })
142
143 " filter the processed errors if desired
144 if exists('g:syntastic_c_remove_include_errors') &&
145 \ g:syntastic_c_remove_include_errors != 0
146 return filter(errors,
147 \ 'has_key(v:val, "bufnr") && v:val["bufnr"]=='.bufnr(''))
148 else
149 return errors
150 endif
151endfunction
152
153let &cpo = s:save_cpo
154unlet s:save_cpo
155
156" vim: set et sts=4 sw=4: