lisp/ob-fortran.el

   1 ;;; ob-fortran.el --- org-babel functions for fortran
   2
   3 ;; Copyright (C) 2011-2013 Free Software Foundation, Inc.
   4
   5 ;; Authors: Sergey Litvinov
   6 ;;       Eric Schulte
   7 ;; Keywords: literate programming, reproducible research, fortran
   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 fortran code.
  28
  29 ;;; Code:
  30 (require 'ob)
  31 (require 'cc-mode)
  32
  33 (declare-function org-entry-get "org"
  34                   (pom property &optional inherit literal-nil))
  35
  36 (defvar org-babel-tangle-lang-exts)
  37 (add-to-list 'org-babel-tangle-lang-exts '("fortran" . "F90"))
  38
  39 (defvar org-babel-default-header-args:fortran '())
  40
  41 (defvar org-babel-fortran-compiler "gfortran"
  42   "fortran command used to compile a fortran source code file into an
  43   executable.")
  44
  45 (defun org-babel-execute:fortran (body params)
  46   "This function should only be called by `org-babel-execute:fortran'"
  47   (let* ((tmp-src-file (org-babel-temp-file "fortran-src-" ".F90"))
  48          (tmp-bin-file (org-babel-temp-file "fortran-bin-" org-babel-exeext))
  49          (cmdline (cdr (assoc :cmdline params)))
  50          (flags (cdr (assoc :flags params)))
  51          (full-body (org-babel-expand-body:fortran body params))
  52          (compile
  53           (progn
  54             (with-temp-file tmp-src-file (insert full-body))
  55             (org-babel-eval
  56              (format "%s -o %s %s %s"
  57                      org-babel-fortran-compiler
  58                      (org-babel-process-file-name tmp-bin-file)
  59                      (mapconcat 'identity
  60                                 (if (listp flags) flags (list flags)) " ")
  61                      (org-babel-process-file-name tmp-src-file)) ""))))
  62     ((lambda (results)
  63        (org-babel-reassemble-table
  64         (org-babel-result-cond (cdr (assoc :result-params params))
  65           (org-babel-read results)
  66           (let ((tmp-file (org-babel-temp-file "f-")))
  67             (with-temp-file tmp-file (insert results))
  68             (org-babel-import-elisp-from-file tmp-file)))
  69         (org-babel-pick-name
  70          (cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
  71         (org-babel-pick-name
  72          (cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))
  73      (org-babel-trim
  74       (org-babel-eval
  75        (concat tmp-bin-file (if cmdline (concat " " cmdline) "")) "")))))
  76
  77 (defun org-babel-expand-body:fortran (body params)
  78   "Expand a block of fortran or fortran code with org-babel according to
  79 it's header arguments."
  80   (let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
  81         (main-p (not (string= (cdr (assoc :main params)) "no")))
  82         (includes (or (cdr (assoc :includes params))
  83                       (org-babel-read (org-entry-get nil "includes" t))))
  84         (defines (org-babel-read
  85                   (or (cdr (assoc :defines params))
  86                       (org-babel-read (org-entry-get nil "defines" t))))))
  87     (mapconcat 'identity
  88                (list
  89                 ;; includes
  90                 (mapconcat
  91                  (lambda (inc) (format "#include %s" inc))
  92                  (if (listp includes) includes (list includes)) "\n")
  93                 ;; defines
  94                 (mapconcat
  95                  (lambda (inc) (format "#define %s" inc))
  96                  (if (listp defines) defines (list defines)) "\n")
  97                 ;; body
  98                 (if main-p
  99                     (org-babel-fortran-ensure-main-wrap
 100                      (concat
 101                       ;; variables
 102                       (mapconcat 'org-babel-fortran-var-to-fortran vars "\n")
 103                       body) params)
 104                   body) "\n") "\n")))
 105
 106 (defun org-babel-fortran-ensure-main-wrap (body params)
 107   "Wrap body in a \"program ... end program\" block if none exists."
 108   (if (string-match "^[ \t]*program[ \t]*.*" (capitalize body))
 109       (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
 110         (if vars (error "Cannot use :vars if 'program' statement is present"))
 111         body)
 112     (format "program main\n%s\nend program main\n" body)))
 113
 114 (defun org-babel-prep-session:fortran (session params)
 115   "This function does nothing as fortran is a compiled language with no
 116 support for sessions"
 117   (error "Fortran is a compiled languages -- no support for sessions"))
 118
 119 (defun org-babel-load-session:fortran (session body params)
 120   "This function does nothing as fortran is a compiled language with no
 121 support for sessions"
 122   (error "Fortran is a compiled languages -- no support for sessions"))
 123
 124 ;; helper functions
 125
 126 (defun org-babel-fortran-var-to-fortran (pair)
 127   "Convert an elisp val into a string of fortran code specifying a var
 128 of the same value."
 129   ;; TODO list support
 130   (let ((var (car pair))
 131         (val (cdr pair)))
 132     (when (symbolp val)
 133       (setq val (symbol-name val))
 134       (when (= (length val) 1)
 135         (setq val (string-to-char val))))
 136     (cond
 137      ((integerp val)
 138       (format "integer, parameter  ::  %S = %S\n" var val))
 139      ((floatp val)
 140       (format "real, parameter ::  %S = %S\n" var val))
 141      ((or (integerp val))
 142       (format "character, parameter :: %S = '%S'\n" var val))
 143      ((stringp val)
 144       (format "character(len=%d), parameter ::  %S = '%s'\n"
 145               (length val) var val))
 146      ((listp val)
 147       (format "real, parameter :: %S(%d) = %s\n"
 148               var (length val) (org-babel-fortran-transform-list val)))
 149      (t
 150       (error (format "the type of parameter %s is not supported by ob-fortran"
 151                      var))))))
 152
 153 (defun org-babel-fortran-transform-list (val)
 154   "Return a fortran representation of enclose syntactic lists."
 155   (if (listp val)
 156       (concat "(/" (mapconcat #'org-babel-fortran-transform-list val ", ") "/)")
 157     (format "%S" val)))
 158
 159 (provide 'ob-fortran)
 160
 161 ;;; ob-fortran.el ends here