lisp/ob-C.el

   1 ;;; ob-C.el --- org-babel functions for C and similar languages
   2
   3 ;; Copyright (C) 2010-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte, Thierry Banel
   6 ;; Keywords: literate programming, reproducible research
   7 ;; Homepage: http://orgmode.org
   8
   9 ;; This file is part of GNU Emacs.
  10
  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.
  15
  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.
  20
  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/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Org-Babel support for evaluating C, C++, D code.
  27 ;;
  28 ;; very limited implementation:
  29 ;; - currently only support :results output
  30 ;; - not much in the way of error feedback
  31
  32 ;;; Code:
  33 (eval-when-compile
  34   (require 'cl))
  35 (require 'ob)
  36 (require 'cc-mode)
  37
  38 (declare-function org-entry-get "org"
  39                   (pom property &optional inherit literal-nil))
  40 (declare-function org-remove-indentation "org" (code &optional n))
  41
  42 (defvar org-babel-tangle-lang-exts)
  43 (add-to-list 'org-babel-tangle-lang-exts '("C++" . "cpp"))
  44 (add-to-list 'org-babel-tangle-lang-exts '("D" . "d"))
  45
  46 (defvar org-babel-default-header-args:C '())
  47
  48 (defvar org-babel-C-compiler "gcc"
  49   "Command used to compile a C source code file into an
  50 executable.")
  51
  52 (defvar org-babel-C++-compiler "g++"
  53   "Command used to compile a C++ source code file into an
  54 executable.")
  55
  56 (defvar org-babel-D-compiler "rdmd"
  57   "Command used to compile and execute a D source code file.")
  58
  59 (defvar org-babel-c-variant nil
  60   "Internal variable used to hold which type of C (e.g. C or C++ or D)
  61 is currently being evaluated.")
  62
  63 (defun org-babel-execute:cpp (body params)
  64   "Execute BODY according to PARAMS.
  65 This function calls `org-babel-execute:C++'."
  66   (org-babel-execute:C++ body params))
  67
  68 (defun org-babel-execute:C++ (body params)
  69   "Execute a block of C++ code with org-babel.
  70 This function is called by `org-babel-execute-src-block'."
  71   (let ((org-babel-c-variant 'cpp)) (org-babel-C-execute body params)))
  72
  73 (defun org-babel-expand-body:C++ (body params)
  74   "Expand a block of C++ code with org-babel according to it's
  75 header arguments."
  76   (let ((org-babel-c-variant 'cpp)) (org-babel-C-expand-C++ body params)))
  77
  78 (defun org-babel-execute:D (body params)
  79   "Execute a block of D code with org-babel.
  80 This function is called by `org-babel-execute-src-block'."
  81   (let ((org-babel-c-variant 'd)) (org-babel-C-execute body params)))
  82
  83 (defun org-babel-expand-body:D (body params)
  84   "Expand a block of D code with org-babel according to it's
  85 header arguments."
  86   (let ((org-babel-c-variant 'd)) (org-babel-C-expand-D body params)))
  87
  88 (defun org-babel-execute:C (body params)
  89   "Execute a block of C code with org-babel.
  90 This function is called by `org-babel-execute-src-block'."
  91   (let ((org-babel-c-variant 'c)) (org-babel-C-execute body params)))
  92
  93 (defun org-babel-expand-body:C (body params)
  94   "Expand a block of C code with org-babel according to it's
  95 header arguments."
  96   (let ((org-babel-c-variant 'c)) (org-babel-C-expand-C body params)))
  97
  98 (defun org-babel-C-execute (body params)
  99   "This function should only be called by `org-babel-execute:C'
 100 or `org-babel-execute:C++' or `org-babel-execute:D'."
 101   (let* ((tmp-src-file (org-babel-temp-file
 102                         "C-src-"
 103                         (case org-babel-c-variant
 104                          (c   ".c"  )
 105                          (cpp ".cpp")
 106                          (d   ".d"  ))))
 107          (tmp-bin-file (org-babel-temp-file "C-bin-" org-babel-exeext)) ;; not used for D
 108          (cmdline (cdr (assoc :cmdline params)))
 109          (cmdline (if cmdline (concat " " cmdline) ""))
 110          (flags (cdr (assoc :flags params)))
 111          (flags (mapconcat 'identity
 112                            (if (listp flags) flags (list flags)) " "))
 113          (full-body
 114           (case org-babel-c-variant
 115             (c   (org-babel-C-expand-C   body params))
 116             (cpp (org-babel-C-expand-C++ body params))
 117             (d   (org-babel-C-expand-D   body params)))))
 118     (with-temp-file tmp-src-file (insert full-body))
 119     (case org-babel-c-variant
 120       ((c cpp)
 121        (org-babel-eval
 122         (format "%s -o %s %s %s"
 123                 (case org-babel-c-variant
 124                  (c   org-babel-C-compiler)
 125                  (cpp org-babel-C++-compiler))
 126                 (org-babel-process-file-name tmp-bin-file)
 127                 flags
 128                 (org-babel-process-file-name tmp-src-file)) ""))
 129       (d nil)) ;; no separate compilation for D
 130     (let ((results
 131            (org-babel-eval
 132             (case org-babel-c-variant
 133               ((c cpp)
 134                (concat tmp-bin-file cmdline))
 135               (d
 136                (format "%s %s %s %s"
 137                        org-babel-D-compiler
 138                        flags
 139                        (org-babel-process-file-name tmp-src-file)
 140                        cmdline)))
 141             "")))
 142       (when results
 143         (setq results (org-babel-trim (org-remove-indentation results)))
 144         (org-babel-reassemble-table
 145          (org-babel-result-cond (cdr (assoc :result-params params))
 146            (org-babel-read results t)
 147            (let ((tmp-file (org-babel-temp-file "c-")))
 148              (with-temp-file tmp-file (insert results))
 149              (org-babel-import-elisp-from-file tmp-file)))
 150          (org-babel-pick-name
 151           (cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
 152          (org-babel-pick-name
 153           (cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))
 154       )))
 155
 156 (defun org-babel-C-expand-C++ (body params)
 157   "Expand a block of C or C++ code with org-babel according to
 158 it's header arguments."
 159   (org-babel-C-expand-C body params))
 160
 161 (defun org-babel-C-expand-C (body params)
 162   "Expand a block of C or C++ code with org-babel according to
 163 it's header arguments."
 164   (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
 165         (colnames (cdar (org-babel-get-header params :colname-names)))
 166         (main-p (not (string= (cdr (assoc :main params)) "no")))
 167         (includes (or (cdr (assoc :includes params))
 168                       (org-babel-read (org-entry-get nil "includes" t))))
 169         (defines (org-babel-read
 170                   (or (cdr (assoc :defines params))
 171                       (org-babel-read (org-entry-get nil "defines" t))))))
 172     (unless (listp includes) (setq includes (list includes)))
 173     (setq includes (append includes '("<string.h>" "<stdio.h>" "<stdlib.h>")))
 174     (mapconcat 'identity
 175                (list
 176                 ;; includes
 177                 (mapconcat
 178                  (lambda (inc) (format "#include %s" inc))
 179                  includes "\n")
 180                 ;; defines
 181                 (mapconcat
 182                  (lambda (inc) (format "#define %s" inc))
 183                  (if (listp defines) defines (list defines)) "\n")
 184                 ;; variables
 185                 (mapconcat 'org-babel-C-var-to-C vars "\n")
 186                 ;; table sizes
 187                 (mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
 188                 ;; tables headers utility
 189                 (when colnames
 190                   (org-babel-C-utility-header-to-C))
 191                 ;; tables headers
 192                 (mapconcat 'org-babel-C-header-to-C colnames "\n")
 193                 ;; body
 194                 (if main-p
 195                     (org-babel-C-ensure-main-wrap body)
 196                   body) "\n") "\n")))
 197
 198 (defun org-babel-C-expand-D (body params)
 199   "Expand a block of D code with org-babel according to
 200 it's header arguments."
 201   (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
 202         (colnames (cdar (org-babel-get-header params :colname-names)))
 203         (main-p (not (string= (cdr (assoc :main params)) "no")))
 204         (imports (or (cdr (assoc :imports params))
 205                      (org-babel-read (org-entry-get nil "imports" t)))))
 206     (unless (listp imports) (setq imports (list imports)))
 207     (setq imports (append imports '("std.stdio" "std.conv")))
 208     (mapconcat 'identity
 209                (list
 210                 "module mmm;"
 211                 ;; imports
 212                 (mapconcat
 213                  (lambda (inc) (format "import %s;" inc))
 214                  imports "\n")
 215                 ;; variables
 216                 (mapconcat 'org-babel-C-var-to-C vars "\n")
 217                 ;; table sizes
 218                 (mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
 219                 ;; tables headers utility
 220                 (when colnames
 221                   (org-babel-C-utility-header-to-C))
 222                 ;; tables headers
 223                 (mapconcat 'org-babel-C-header-to-C colnames "\n")
 224                 ;; body
 225                 (if main-p
 226                     (org-babel-C-ensure-main-wrap body)
 227                   body) "\n") "\n")))
 228
 229 (defun org-babel-C-ensure-main-wrap (body)
 230   "Wrap BODY in a \"main\" function call if none exists."
 231   (if (string-match "^[ \t]*[intvod]+[ \t\n\r]*main[ \t]*(.*)" body)
 232       body
 233     (format "int main() {\n%s\nreturn 0;\n}\n" body)))
 234
 235 (defun org-babel-prep-session:C (session params)
 236   "This function does nothing as C is a compiled language with no
 237 support for sessions"
 238   (error "C is a compiled languages -- no support for sessions"))
 239
 240 (defun org-babel-load-session:C (session body params)
 241   "This function does nothing as C is a compiled language with no
 242 support for sessions"
 243   (error "C is a compiled languages -- no support for sessions"))
 244
 245 ;; helper functions
 246
 247 (defun org-babel-C-format-val (type val)
 248   "Handle the FORMAT part of TYPE with the data from VAL."
 249   (let ((format-data (cadr type)))
 250     (if (stringp format-data)
 251         (cons "" (format format-data val))
 252       (funcall format-data val))))
 253
 254 (defun org-babel-C-val-to-C-type (val)
 255   "Determine the type of VAL.
 256 Return a list (TYPE-NAME FORMAT).  TYPE-NAME should be the name of the type.
 257 FORMAT can be either a format string or a function which is called with VAL."
 258   (let* ((basetype (org-babel-C-val-to-base-type val))
 259          (type
 260           (case basetype
 261             (integerp '("int" "%d"))
 262             (floatp '("double" "%f"))
 263             (stringp
 264              (list
 265               (if (equal org-babel-c-variant 'd) "string" "const char*")
 266               "\"%s\""))
 267             (t (error "unknown type %S" type)))))
 268     (cond
 269      ((integerp val) type) ;; an integer declared in the #+begin_src line
 270      ((floatp val) type) ;; a numeric declared in the #+begin_src line
 271      ((and (listp val) (listp (car val))) ;; a table
 272       `(,(car type)
 273         (lambda (val)
 274           (cons
 275            (format "[%d][%d]" (length val) (length (car val)))
 276            (concat
 277             (if (equal org-babel-c-variant 'd) "[\n" "{\n")
 278             (mapconcat
 279              (lambda (v)
 280                (concat
 281                 (if (equal org-babel-c-variant 'd) " [" " {")
 282                 (mapconcat (lambda (w) (format ,(cadr type) w)) v ",")
 283                 (if (equal org-babel-c-variant 'd) "]" "}")))
 284              val
 285              ",\n")
 286             (if (equal org-babel-c-variant 'd) "\n]" "\n}"))))))
 287      ((or (listp val) (vectorp val)) ;; a list declared in the #+begin_src line
 288       `(,(car type)
 289         (lambda (val)
 290           (cons
 291            (format "[%d]" (length val))
 292            (concat
 293             (if (equal org-babel-c-variant 'd) "[" "{")
 294             (mapconcat (lambda (v) (format ,(cadr type) v)) val ",")
 295             (if (equal org-babel-c-variant 'd) "]" "}"))))))
 296      (t ;; treat unknown types as string
 297       type))))
 298
 299 (defun org-babel-C-val-to-base-type (val)
 300   "Determine the base type of VAL which may be
 301 'integerp if all base values are integers
 302 'floatp if all base values are either floating points or integers
 303 'stringp otherwise."
 304   (cond
 305    ((integerp val) 'integerp)
 306    ((floatp val) 'floatp)
 307    ((or (listp val) (vectorp val))
 308     (let ((type nil))
 309       (mapc (lambda (v)
 310               (case (org-babel-C-val-to-base-type v)
 311                 (stringp (setq type 'stringp))
 312                 (floatp
 313                  (if (or (not type) (eq type 'integerp))
 314                      (setq type 'floatp)))
 315                 (integerp
 316                  (unless type (setq type 'integerp)))))
 317             val)
 318       type))
 319    (t 'stringp)))
 320
 321 (defun org-babel-C-var-to-C (pair)
 322   "Convert an elisp val into a string of C code specifying a var
 323 of the same value."
 324   ;; TODO list support
 325   (let ((var (car pair))
 326         (val (cdr pair)))
 327     (when (symbolp val)
 328       (setq val (symbol-name val))
 329       (when (= (length val) 1)
 330         (setq val (string-to-char val))))
 331     (let* ((type-data (org-babel-C-val-to-C-type val))
 332            (type (car type-data))
 333            (formated (org-babel-C-format-val type-data val))
 334            (suffix (car formated))
 335            (data (cdr formated)))
 336       (format "%s %s%s = %s;"
 337               type
 338               var
 339               suffix
 340               data))))
 341
 342 (defun org-babel-C-table-sizes-to-C (pair)
 343   "Create constants of table dimensions, if PAIR is a table."
 344   (when (listp (cdr pair))
 345     (cond
 346      ((listp (cadr pair)) ;; a table
 347       (concat
 348        (format "const int %s_rows = %d;" (car pair) (length (cdr pair)))
 349        "\n"
 350        (format "const int %s_cols = %d;" (car pair) (length (cadr pair)))))
 351      (t ;; a list declared in the #+begin_src line
 352       (format "const int %s_cols = %d;" (car pair) (length (cdr pair)))))))
 353
 354 (defun org-babel-C-utility-header-to-C ()
 355   "Generate a utility function to convert a column name
 356 into a column number."
 357   (case org-babel-c-variant
 358     ((c cpp)
 359      "int get_column_num (int nbcols, const char** header, const char* column)
 360 {
 361   int c;
 362   for (c=0; c<nbcols; c++)
 363     if (strcmp(header[c],column)==0)
 364       return c;
 365   return -1;
 366 }
 367 "
 368      )
 369     (d
 370      "int get_column_num (string[] header, string column)
 371 {
 372   foreach (c, h; header)
 373     if (h==column)
 374       return to!int(c);
 375   return -1;
 376 }
 377 "
 378      )))
 379
 380 (defun org-babel-C-header-to-C (head)
 381   "Convert an elisp list of header table into a C or D vector
 382 specifying a variable with the name of the table."
 383   (let ((table (car head))
 384         (headers (cdr head)))
 385     (concat
 386      (format
 387       (case org-babel-c-variant
 388         ((c cpp) "const char* %s_header[%d] = {%s};")
 389         (d       "string %s_header[%d] = [%s];"))
 390       table
 391       (length headers)
 392       (mapconcat (lambda (h) (format "%S" h)) headers ","))
 393      "\n"
 394      (case org-babel-c-variant
 395        ((c cpp)
 396         (format
 397          "const char* %s_h (int row, const char* col) { return %s[row][get_column_num(%d,%s_header,col)]; }"
 398          table table (length headers) table))
 399        (d
 400         (format
 401          "string %s_h (ulong row, string col) { return %s[row][get_column_num(%s_header,col)]; }"
 402          table table table))))))
 403
 404 (provide 'ob-C)
 405
 406 ;;; ob-C.el ends here