1 ;;; ob-C.el --- org-babel functions for C and similar languages
3 ;; Copyright (C) 2010-2013 Free Software Foundation, Inc.
5 ;; Author: Eric Schulte
6 ;; Keywords: literate programming, reproducible research
7 ;; Homepage: http://orgmode.org
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; Org-Babel support for evaluating C code.
28 ;; very limited implementation:
29 ;; - currently only support :results output
30 ;; - not much in the way of error feedback
38 (declare-function org-entry-get
"org"
39 (pom property
&optional inherit literal-nil
))
40 (declare-function org-remove-indentation
"org" (code &optional n
))
42 (defvar org-babel-tangle-lang-exts
)
43 (add-to-list 'org-babel-tangle-lang-exts
'("C++" .
"cpp"))
45 (defvar org-babel-default-header-args
:C
'())
47 (defvar org-babel-C-compiler
"gcc"
48 "Command used to compile a C source code file into an
51 (defvar org-babel-C
++-compiler
"g++"
52 "Command used to compile a C++ source code file into an
55 (defvar org-babel-c-variant nil
56 "Internal variable used to hold which type of C (e.g. C or C++)
57 is currently being evaluated.")
59 (defun org-babel-execute:cpp
(body params
)
60 "Execute BODY according to PARAMS.
61 This function calls `org-babel-execute:C++'."
62 (org-babel-execute:C
++ body params
))
64 (defun org-babel-execute:C
++ (body params
)
65 "Execute a block of C++ code with org-babel.
66 This function is called by `org-babel-execute-src-block'."
67 (let ((org-babel-c-variant 'cpp
)) (org-babel-C-execute body params
)))
69 (defun org-babel-expand-body:C
++ (body params
)
70 "Expand a block of C++ code with org-babel according to it's
71 header arguments (calls `org-babel-C-expand')."
72 (let ((org-babel-c-variant 'cpp
)) (org-babel-C-expand body params
)))
74 (defun org-babel-execute:C
(body params
)
75 "Execute a block of C code with org-babel.
76 This function is called by `org-babel-execute-src-block'."
77 (let ((org-babel-c-variant 'c
)) (org-babel-C-execute body params
)))
79 (defun org-babel-expand-body:c
(body params
)
80 "Expand a block of C code with org-babel according to it's
81 header arguments (calls `org-babel-C-expand')."
82 (let ((org-babel-c-variant 'c
)) (org-babel-C-expand body params
)))
84 (defun org-babel-C-execute (body params
)
85 "This function should only be called by `org-babel-execute:C'
86 or `org-babel-execute:C++'."
87 (let* ((tmp-src-file (org-babel-temp-file
90 ((equal org-babel-c-variant
'c
) ".c")
91 ((equal org-babel-c-variant
'cpp
) ".cpp"))))
92 (tmp-bin-file (org-babel-temp-file "C-bin-" org-babel-exeext
))
93 (cmdline (cdr (assoc :cmdline params
)))
94 (flags (cdr (assoc :flags params
)))
95 (full-body (org-babel-C-expand body params
))
98 (with-temp-file tmp-src-file
(insert full-body
))
100 (format "%s -o %s %s %s"
102 ((equal org-babel-c-variant
'c
) org-babel-C-compiler
)
103 ((equal org-babel-c-variant
'cpp
) org-babel-C
++-compiler
))
104 (org-babel-process-file-name tmp-bin-file
)
106 (if (listp flags
) flags
(list flags
)) " ")
107 (org-babel-process-file-name tmp-src-file
)) ""))))
110 (org-remove-indentation
112 (concat tmp-bin-file
(if cmdline
(concat " " cmdline
) "")) "")))))
113 (org-babel-reassemble-table
114 (org-babel-result-cond (cdr (assoc :result-params params
))
115 (org-babel-read results t
)
116 (let ((tmp-file (org-babel-temp-file "c-")))
117 (with-temp-file tmp-file
(insert results
))
118 (org-babel-import-elisp-from-file tmp-file
)))
120 (cdr (assoc :colname-names params
)) (cdr (assoc :colnames params
)))
122 (cdr (assoc :rowname-names params
)) (cdr (assoc :rownames params
)))))
125 (defun org-babel-C-expand (body params
)
126 "Expand a block of C or C++ code with org-babel according to
127 it's header arguments."
128 (let ((vars (mapcar #'cdr
(org-babel-get-header params
:var
)))
129 (main-p (not (string= (cdr (assoc :main params
)) "no")))
130 (includes (or (cdr (assoc :includes params
))
131 (org-babel-read (org-entry-get nil
"includes" t
))))
132 (defines (org-babel-read
133 (or (cdr (assoc :defines params
))
134 (org-babel-read (org-entry-get nil
"defines" t
))))))
139 (lambda (inc) (format "#include %s" inc
))
140 (if (listp includes
) includes
(list includes
)) "\n")
143 (lambda (inc) (format "#define %s" inc
))
144 (if (listp defines
) defines
(list defines
)) "\n")
146 (mapconcat 'org-babel-C-var-to-C vars
"\n")
149 (org-babel-C-ensure-main-wrap body
)
152 (defun org-babel-C-ensure-main-wrap (body)
153 "Wrap BODY in a \"main\" function call if none exists."
154 (if (string-match "^[ \t]*[intvod]+[ \t\n\r]*main[ \t]*(.*)" body
)
156 (format "int main() {\n%s\nreturn 0;\n}\n" body
)))
158 (defun org-babel-prep-session:C
(session params
)
159 "This function does nothing as C is a compiled language with no
160 support for sessions"
161 (error "C is a compiled languages -- no support for sessions"))
163 (defun org-babel-load-session:C
(session body params
)
164 "This function does nothing as C is a compiled language with no
165 support for sessions"
166 (error "C is a compiled languages -- no support for sessions"))
170 (defun org-babel-C-format-val (type val
)
171 "Handle the FORMAT part of TYPE with the data from VAL."
172 (let ((format-data (cadr type
)))
173 (if (stringp format-data
)
174 (cons "" (format format-data val
))
175 (funcall format-data val
))))
177 (defun org-babel-C-val-to-C-type (val)
178 "Determine the type of VAL.
179 Return a list (TYPE-NAME FORMAT). TYPE-NAME should be the name of the type.
180 FORMAT can be either a format string or a function which is called with VAL."
182 ((integerp val
) '("int" "%d"))
183 ((floatp val
) '("double" "%f"))
184 ((or (listp val
) (vectorp val
))
185 (lexical-let ((type (org-babel-C-val-to-C-list-type val
)))
191 (car (org-babel-C-format-val type
(elt val
0))))
193 (mapconcat (lambda (v)
194 (cdr (org-babel-C-format-val type v
)))
198 (t ;; treat unknown types as string
199 '("char" (lambda (val)
200 (let ((s (format "%s" val
))) ;; convert to string for unknown types
201 (cons (format "[%d]" (1+ (length s
)))
202 (concat "\"" s
"\""))))))))
204 (defun org-babel-C-val-to-C-list-type (val)
205 "Determine the C array type of a VAL."
209 (let* ((tmp-type (org-babel-C-val-to-C-type i
))
210 (type-name (car type
))
211 (tmp-type-name (car tmp-type
)))
212 (when (and type
(not (string= type-name tmp-type-name
)))
213 (if (and (member type-name
'("int" "double" "int32_t"))
214 (member tmp-type-name
'("int" "double" "int32_t")))
215 (setq tmp-type
'("double" "" "%f"))
216 (error "Only homogeneous lists are supported by C. You can not mix %s and %s"
219 (setq type tmp-type
)))
223 (defun org-babel-C-var-to-C (pair)
224 "Convert an elisp val into a string of C code specifying a var
227 (let ((var (car pair
))
230 (setq val
(symbol-name val
))
231 (when (= (length val
) 1)
232 (setq val
(string-to-char val
))))
233 (let* ((type-data (org-babel-C-val-to-C-type val
))
234 (type (car type-data
))
235 (formated (org-babel-C-format-val type-data val
))
236 (suffix (car formated
))
237 (data (cdr formated
)))
238 (format "%s %s%s = %s;"
246 ;;; ob-C.el ends here