lisp/ob-C.el

   1 ;;; ob-C.el --- org-babel functions for C and similar languages
   2
   3 ;; Copyright (C) 2010-2016 Free Software Foundation, Inc.
   4
   5 ;; Author: Eric Schulte
   6 ;;      Thierry Banel
   7 ;; Keywords: literate programming, reproducible research
   8 ;; Homepage: http://orgmode.org
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; Org-Babel support for evaluating C, C++, D code.
  28 ;;
  29 ;; very limited implementation:
  30 ;; - currently only support :results output
  31 ;; - not much in the way of error feedback
  32
  33 ;;; Code:
  34 (require 'ob)
  35 (require 'cc-mode)
  36
  37 (declare-function org-entry-get "org"
  38                   (pom property &optional inherit literal-nil))
  39 (declare-function org-remove-indentation "org" (code &optional n))
  40
  41 (defvar org-babel-tangle-lang-exts)
  42 (add-to-list 'org-babel-tangle-lang-exts '("C++" . "cpp"))
  43 (add-to-list 'org-babel-tangle-lang-exts '("D" . "d"))
  44
  45 (defvar org-babel-default-header-args:C '())
  46
  47 (defcustom org-babel-C-compiler "gcc"
  48   "Command used to compile a C source code file into an executable.
  49 May be either a command in the path, like gcc
  50 or an absolute path name, like /usr/local/bin/gcc
  51 parameter may be used, like gcc -v"
  52   :group 'org-babel
  53   :version "24.3"
  54   :type 'string)
  55
  56 (defcustom org-babel-C++-compiler "g++"
  57   "Command used to compile a C++ source code file into an executable.
  58 May be either a command in the path, like g++
  59 or an absolute path name, like /usr/local/bin/g++
  60 parameter may be used, like g++ -v"
  61   :group 'org-babel
  62   :version "24.3"
  63   :type 'string)
  64
  65 (defcustom org-babel-D-compiler "rdmd"
  66   "Command used to compile and execute a D source code file.
  67 May be either a command in the path, like rdmd
  68 or an absolute path name, like /usr/local/bin/rdmd
  69 parameter may be used, like rdmd --chatty"
  70   :group 'org-babel
  71   :version "24.3"
  72   :type 'string)
  73
  74 (defvar org-babel-c-variant nil
  75   "Internal variable used to hold which type of C (e.g. C or C++ or D)
  76 is currently being evaluated.")
  77
  78 (defun org-babel-execute:cpp (body params)
  79   "Execute BODY according to PARAMS.
  80 This function calls `org-babel-execute:C++'."
  81   (org-babel-execute:C++ body params))
  82
  83 (defun org-babel-expand-body:cpp (body params)
  84   "Expand a block of C++ code with org-babel according to its
  85 header arguments."
  86   (org-babel-expand-body:C++ 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 'cpp)) (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 its
  95 header arguments."
  96   (let ((org-babel-c-variant 'cpp)) (org-babel-C-expand-C++ body params)))
  97
  98 (defun org-babel-execute:D (body params)
  99   "Execute a block of D code with org-babel.
 100 This function is called by `org-babel-execute-src-block'."
 101   (let ((org-babel-c-variant 'd)) (org-babel-C-execute body params)))
 102
 103 (defun org-babel-expand-body:D (body params)
 104   "Expand a block of D code with org-babel according to its
 105 header arguments."
 106   (let ((org-babel-c-variant 'd)) (org-babel-C-expand-D body params)))
 107
 108 (defun org-babel-execute:C (body params)
 109   "Execute a block of C code with org-babel.
 110 This function is called by `org-babel-execute-src-block'."
 111   (let ((org-babel-c-variant 'c)) (org-babel-C-execute body params)))
 112
 113 (defun org-babel-expand-body:C (body params)
 114   "Expand a block of C code with org-babel according to its
 115 header arguments."
 116   (let ((org-babel-c-variant 'c)) (org-babel-C-expand-C body params)))
 117
 118 (defun org-babel-C-execute (body params)
 119   "This function should only be called by `org-babel-execute:C'
 120 or `org-babel-execute:C++' or `org-babel-execute:D'."
 121   (let* ((tmp-src-file (org-babel-temp-file
 122                         "C-src-"
 123                         (case org-babel-c-variant
 124                          (c   ".c"  )
 125                          (cpp ".cpp")
 126                          (d   ".d"  ))))
 127          (tmp-bin-file (org-babel-temp-file "C-bin-" org-babel-exeext)) ;; not used for D
 128          (cmdline (cdr (assoc :cmdline params)))
 129          (cmdline (if cmdline (concat " " cmdline) ""))
 130          (flags (cdr (assoc :flags params)))
 131          (flags (mapconcat 'identity
 132                            (if (listp flags) flags (list flags)) " "))
 133          (full-body
 134           (case org-babel-c-variant
 135             (c   (org-babel-C-expand-C   body params))
 136             (cpp (org-babel-C-expand-C++ body params))
 137             (d   (org-babel-C-expand-D   body params)))))
 138     (with-temp-file tmp-src-file (insert full-body))
 139     (case org-babel-c-variant
 140       ((c cpp)
 141        (org-babel-eval
 142         (format "%s -o %s %s %s"
 143                 (case org-babel-c-variant
 144                  (c   org-babel-C-compiler)
 145                  (cpp org-babel-C++-compiler))
 146                 (org-babel-process-file-name tmp-bin-file)
 147                 flags
 148                 (org-babel-process-file-name tmp-src-file)) ""))
 149       (d nil)) ;; no separate compilation for D
 150     (let ((results
 151            (org-babel-eval
 152             (case org-babel-c-variant
 153               ((c cpp)
 154                (concat tmp-bin-file cmdline))
 155               (d
 156                (format "%s %s %s %s"
 157                        org-babel-D-compiler
 158                        flags
 159                        (org-babel-process-file-name tmp-src-file)
 160                        cmdline)))
 161             "")))
 162       (when results
 163         (setq results (org-babel-trim (org-remove-indentation results)))
 164         (org-babel-reassemble-table
 165          (org-babel-result-cond (cdr (assoc :result-params params))
 166            (org-babel-read results t)
 167            (let ((tmp-file (org-babel-temp-file "c-")))
 168              (with-temp-file tmp-file (insert results))
 169              (org-babel-import-elisp-from-file tmp-file)))
 170          (org-babel-pick-name
 171           (cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
 172          (org-babel-pick-name
 173           (cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))
 174       )))
 175
 176 (defun org-babel-C-expand-C++ (body params)
 177   "Expand a block of C or C++ code with org-babel according to
 178 its header arguments."
 179   (org-babel-C-expand-C body params))
 180
 181 (defun org-babel-C-expand-C (body params)
 182   "Expand a block of C or C++ code with org-babel according to
 183 its header arguments."
 184   (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
 185         (colnames (cdar (org-babel-get-header params :colname-names)))
 186         (main-p (not (string= (cdr (assoc :main params)) "no")))
 187         (includes (org-babel-read
 188                    (or (cdr (assoc :includes params))
 189                        (org-entry-get nil "includes" t))
 190                    nil))
 191         (defines (org-babel-read
 192                   (or (cdr (assoc :defines params))
 193                       (org-entry-get nil "defines" t))
 194                   nil)))
 195     (when (stringp includes)
 196       (setq includes (split-string includes)))
 197     (when (stringp defines)
 198       (let ((y nil)
 199             (result (list t)))
 200         (dolist (x (split-string defines))
 201           (if (null y)
 202               (setq y x)
 203             (nconc result (list (concat y " " x)))
 204             (setq y nil)))
 205         (setq defines (cdr result))))
 206     (mapconcat 'identity
 207                (list
 208                 ;; includes
 209                 (mapconcat
 210                  (lambda (inc) (format "#include %s" inc))
 211                  includes "\n")
 212                 ;; defines
 213                 (mapconcat
 214                  (lambda (inc) (format "#define %s" inc))
 215                  (if (listp defines) defines (list defines)) "\n")
 216                 ;; variables
 217                 (mapconcat 'org-babel-C-var-to-C vars "\n")
 218                 ;; table sizes
 219                 (mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
 220                 ;; tables headers utility
 221                 (when colnames
 222                   (org-babel-C-utility-header-to-C))
 223                 ;; tables headers
 224                 (mapconcat 'org-babel-C-header-to-C colnames "\n")
 225                 ;; body
 226                 (if main-p
 227                     (org-babel-C-ensure-main-wrap body)
 228                   body) "\n") "\n")))
 229
 230 (defun org-babel-C-expand-D (body params)
 231   "Expand a block of D code with org-babel according to
 232 its header arguments."
 233   (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
 234         (colnames (cdar (org-babel-get-header params :colname-names)))
 235         (main-p (not (string= (cdr (assoc :main params)) "no")))
 236         (imports (or (cdr (assoc :imports params))
 237                      (org-babel-read (org-entry-get nil "imports" t)))))
 238     (when (stringp imports)
 239       (setq imports (split-string imports)))
 240     (setq imports (append imports '("std.stdio" "std.conv")))
 241     (mapconcat 'identity
 242                (list
 243                 "module mmm;"
 244                 ;; imports
 245                 (mapconcat
 246                  (lambda (inc) (format "import %s;" inc))
 247                  imports "\n")
 248                 ;; variables
 249                 (mapconcat 'org-babel-C-var-to-C vars "\n")
 250                 ;; table sizes
 251                 (mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
 252                 ;; tables headers utility
 253                 (when colnames
 254                   (org-babel-C-utility-header-to-C))
 255                 ;; tables headers
 256                 (mapconcat 'org-babel-C-header-to-C colnames "\n")
 257                 ;; body
 258                 (if main-p
 259                     (org-babel-C-ensure-main-wrap body)
 260                   body) "\n") "\n")))
 261
 262 (defun org-babel-C-ensure-main-wrap (body)
 263   "Wrap BODY in a \"main\" function call if none exists."
 264   (if (string-match "^[ \t]*[intvod]+[ \t\n\r]*main[ \t]*(.*)" body)
 265       body
 266     (format "int main() {\n%s\nreturn 0;\n}\n" body)))
 267
 268 (defun org-babel-prep-session:C (session params)
 269   "This function does nothing as C is a compiled language with no
 270 support for sessions"
 271   (error "C is a compiled languages -- no support for sessions"))
 272
 273 (defun org-babel-load-session:C (session body params)
 274   "This function does nothing as C is a compiled language with no
 275 support for sessions"
 276   (error "C is a compiled languages -- no support for sessions"))
 277
 278 ;; helper functions
 279
 280 (defun org-babel-C-format-val (type val)
 281   "Handle the FORMAT part of TYPE with the data from VAL."
 282   (let ((format-data (cadr type)))
 283     (if (stringp format-data)
 284         (cons "" (format format-data val))
 285       (funcall format-data val))))
 286
 287 (defun org-babel-C-val-to-C-type (val)
 288   "Determine the type of VAL.
 289 Return a list (TYPE-NAME FORMAT).  TYPE-NAME should be the name of the type.
 290 FORMAT can be either a format string or a function which is called with VAL."
 291   (let* ((basetype (org-babel-C-val-to-base-type val))
 292          (type
 293           (case basetype
 294             (integerp '("int" "%d"))
 295             (floatp '("double" "%f"))
 296             (stringp
 297              (list
 298               (if (equal org-babel-c-variant 'd) "string" "const char*")
 299               "\"%s\""))
 300             (t (error "unknown type %S" basetype)))))
 301     (cond
 302      ((integerp val) type) ;; an integer declared in the #+begin_src line
 303      ((floatp val) type) ;; a numeric declared in the #+begin_src line
 304      ((and (listp val) (listp (car val))) ;; a table
 305       `(,(car type)
 306         (lambda (val)
 307           (cons
 308            (format "[%d][%d]" (length val) (length (car val)))
 309            (concat
 310             (if (equal org-babel-c-variant 'd) "[\n" "{\n")
 311             (mapconcat
 312              (lambda (v)
 313                (concat
 314                 (if (equal org-babel-c-variant 'd) " [" " {")
 315                 (mapconcat (lambda (w) (format ,(cadr type) w)) v ",")
 316                 (if (equal org-babel-c-variant 'd) "]" "}")))
 317              val
 318              ",\n")
 319             (if (equal org-babel-c-variant 'd) "\n]" "\n}"))))))
 320      ((or (listp val) (vectorp val)) ;; a list declared in the #+begin_src line
 321       `(,(car type)
 322         (lambda (val)
 323           (cons
 324            (format "[%d]" (length val))
 325            (concat
 326             (if (equal org-babel-c-variant 'd) "[" "{")
 327             (mapconcat (lambda (v) (format ,(cadr type) v)) val ",")
 328             (if (equal org-babel-c-variant 'd) "]" "}"))))))
 329      (t ;; treat unknown types as string
 330       type))))
 331
 332 (defun org-babel-C-val-to-base-type (val)
 333   "Determine the base type of VAL which may be
 334 `integerp' if all base values are integers
 335 `floatp' if all base values are either floating points or integers
 336 `stringp' otherwise."
 337   (cond
 338    ((integerp val) 'integerp)
 339    ((floatp val) 'floatp)
 340    ((or (listp val) (vectorp val))
 341     (let ((type nil))
 342       (mapc (lambda (v)
 343               (case (org-babel-C-val-to-base-type v)
 344                 (stringp (setq type 'stringp))
 345                 (floatp
 346                  (if (or (not type) (eq type 'integerp))
 347                      (setq type 'floatp)))
 348                 (integerp
 349                  (unless type (setq type 'integerp)))))
 350             val)
 351       type))
 352    (t 'stringp)))
 353
 354 (defun org-babel-C-var-to-C (pair)
 355   "Convert an elisp val into a string of C code specifying a var
 356 of the same value."
 357   ;; TODO list support
 358   (let ((var (car pair))
 359         (val (cdr pair)))
 360     (when (symbolp val)
 361       (setq val (symbol-name val))
 362       (when (= (length val) 1)
 363         (setq val (string-to-char val))))
 364     (let* ((type-data (org-babel-C-val-to-C-type val))
 365            (type (car type-data))
 366            (formated (org-babel-C-format-val type-data val))
 367            (suffix (car formated))
 368            (data (cdr formated)))
 369       (format "%s %s%s = %s;"
 370               type
 371               var
 372               suffix
 373               data))))
 374
 375 (defun org-babel-C-table-sizes-to-C (pair)
 376   "Create constants of table dimensions, if PAIR is a table."
 377   (when (listp (cdr pair))
 378     (cond
 379      ((listp (cadr pair)) ;; a table
 380       (concat
 381        (format "const int %s_rows = %d;" (car pair) (length (cdr pair)))
 382        "\n"
 383        (format "const int %s_cols = %d;" (car pair) (length (cadr pair)))))
 384      (t ;; a list declared in the #+begin_src line
 385       (format "const int %s_cols = %d;" (car pair) (length (cdr pair)))))))
 386
 387 (defun org-babel-C-utility-header-to-C ()
 388   "Generate a utility function to convert a column name
 389 into a column number."
 390   (case org-babel-c-variant
 391     ((c cpp)
 392      "int get_column_num (int nbcols, const char** header, const char* column)
 393 {
 394   int c;
 395   for (c=0; c<nbcols; c++)
 396     if (strcmp(header[c],column)==0)
 397       return c;
 398   return -1;
 399 }
 400 "
 401      )
 402     (d
 403      "int get_column_num (string[] header, string column)
 404 {
 405   foreach (c, h; header)
 406     if (h==column)
 407       return to!int(c);
 408   return -1;
 409 }
 410 "
 411      )))
 412
 413 (defun org-babel-C-header-to-C (head)
 414   "Convert an elisp list of header table into a C or D vector
 415 specifying a variable with the name of the table."
 416   (let ((table (car head))
 417         (headers (cdr head)))
 418     (concat
 419      (format
 420       (case org-babel-c-variant
 421         ((c cpp) "const char* %s_header[%d] = {%s};")
 422         (d       "string %s_header[%d] = [%s];"))
 423       table
 424       (length headers)
 425       (mapconcat (lambda (h) (format "%S" h)) headers ","))
 426      "\n"
 427      (case org-babel-c-variant
 428        ((c cpp)
 429         (format
 430          "const char* %s_h (int row, const char* col) { return %s[row][get_column_num(%d,%s_header,col)]; }"
 431          table table (length headers) table))
 432        (d
 433         (format
 434          "string %s_h (size_t row, string col) { return %s[row][get_column_num(%s_header,col)]; }"
 435          table table table))))))
 436
 437 (provide 'ob-C)
 438
 439 ;;; ob-C.el ends here