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-;;; ob-fortran.el --- Babel Functions for Fortran -*- lexical-binding: t; -*-
-
-;; Copyright (C) 2011-2021 Free Software Foundation, Inc.
-
-;; Authors: Sergey Litvinov
-;; Eric Schulte
-;; Keywords: literate programming, reproducible research, fortran
-;; Homepage: https://orgmode.org
-
-;; This file is part of GNU Emacs.
-;;
-;; GNU Emacs is free software: you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation, either version 3 of the License, or
-;; (at your option) any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
-
-;;; Commentary:
-
-;; Org-Babel support for evaluating fortran code.
-
-;;; Code:
-(require 'ob)
-(require 'org-macs)
-(require 'cc-mode)
-(require 'cl-lib)
-
-(declare-function org-entry-get "org"
- (pom property &optional inherit literal-nil))
-
-(defvar org-babel-tangle-lang-exts)
-(add-to-list 'org-babel-tangle-lang-exts '("fortran" . "F90"))
-
-(defvar org-babel-default-header-args:fortran '())
-
-(defcustom org-babel-fortran-compiler "gfortran"
- "Fortran command used to compile Fortran source code file."
- :group 'org-babel
- :package-version '(Org . "9.5")
- :type 'string)
-
-(defun org-babel-execute:fortran (body params)
- "This function should only be called by `org-babel-execute:fortran'."
- (let* ((tmp-src-file (org-babel-temp-file "fortran-src-" ".F90"))
- (tmp-bin-file (org-babel-temp-file "fortran-bin-" org-babel-exeext))
- (cmdline (cdr (assq :cmdline params)))
- (flags (cdr (assq :flags params)))
- (full-body (org-babel-expand-body:fortran body params)))
- (with-temp-file tmp-src-file (insert full-body))
- (org-babel-eval
- (format "%s -o %s %s %s"
- org-babel-fortran-compiler
- (org-babel-process-file-name tmp-bin-file)
- (mapconcat 'identity
- (if (listp flags) flags (list flags)) " ")
- (org-babel-process-file-name tmp-src-file)) "")
- (let ((results
- (org-trim
- (org-remove-indentation
- (org-babel-eval
- (concat tmp-bin-file (if cmdline (concat " " cmdline) "")) "")))))
- (org-babel-reassemble-table
- (org-babel-result-cond (cdr (assq :result-params params))
- (org-babel-read results)
- (let ((tmp-file (org-babel-temp-file "f-")))
- (with-temp-file tmp-file (insert results))
- (org-babel-import-elisp-from-file tmp-file)))
- (org-babel-pick-name
- (cdr (assq :colname-names params)) (cdr (assq :colnames params)))
- (org-babel-pick-name
- (cdr (assq :rowname-names params)) (cdr (assq :rownames params)))))))
-
-(defun org-babel-expand-body:fortran (body params)
- "Expand a block of fortran or fortran code with org-babel according to
-its header arguments."
- (let ((vars (org-babel--get-vars params))
- (main-p (not (string= (cdr (assq :main params)) "no")))
- (includes (or (cdr (assq :includes params))
- (org-babel-read (org-entry-get nil "includes" t))))
- (defines (org-babel-read
- (or (cdr (assq :defines params))
- (org-babel-read (org-entry-get nil "defines" t))))))
- (mapconcat 'identity
- (list
- ;; includes
- (mapconcat
- (lambda (inc) (format "#include %s" inc))
- (if (listp includes) includes (list includes)) "\n")
- ;; defines
- (mapconcat
- (lambda (inc) (format "#define %s" inc))
- (if (listp defines) defines (list defines)) "\n")
- ;; body
- (if main-p
- (org-babel-fortran-ensure-main-wrap
- (concat
- ;; variables
- (mapconcat 'org-babel-fortran-var-to-fortran vars "\n")
- body)
- params)
- body) "\n") "\n")))
-
-(defun org-babel-fortran-ensure-main-wrap (body params)
- "Wrap body in a \"program ... end program\" block if none exists."
- (if (string-match "^[ \t]*program\\>" (capitalize body))
- (let ((vars (org-babel--get-vars params)))
- (when vars (error "Cannot use :vars if `program' statement is present"))
- body)
- (format "program main\n%s\nend program main\n" body)))
-
-(defun org-babel-prep-session:fortran (_session _params)
- "This function does nothing as fortran is a compiled language with no
-support for sessions."
- (error "Fortran is a compiled languages -- no support for sessions"))
-
-(defun org-babel-load-session:fortran (_session _body _params)
- "This function does nothing as fortran is a compiled language with no
-support for sessions."
- (error "Fortran is a compiled languages -- no support for sessions"))
-
-;; helper functions
-
-(defun org-babel-fortran-var-to-fortran (pair)
- "Convert an elisp val into a string of fortran code specifying a var
-of the same value."
- ;; TODO list support
- (let ((var (car pair))
- (val (cdr pair)))
- (when (symbolp val)
- (setq val (symbol-name val))
- (when (= (length val) 1)
- (setq val (string-to-char val))))
- (cond
- ((integerp val)
- (format "integer, parameter :: %S = %S\n" var val))
- ((floatp val)
- (format "real, parameter :: %S = %S\n" var val))
- ((or (integerp val))
- (format "character, parameter :: %S = '%S'\n" var val))
- ((stringp val)
- (format "character(len=%d), parameter :: %S = '%s'\n"
- (length val) var val))
- ;; val is a matrix
- ((and (listp val) (cl-every #'listp val))
- (format "real, parameter :: %S(%d,%d) = transpose( reshape( %s , (/ %d, %d /) ) )\n"
- var (length val) (length (car val))
- (org-babel-fortran-transform-list val)
- (length (car val)) (length val)))
- ((listp val)
- (format "real, parameter :: %S(%d) = %s\n"
- var (length val) (org-babel-fortran-transform-list val)))
- (t
- (error "The type of parameter %s is not supported by ob-fortran" var)))))
-
-(defun org-babel-fortran-transform-list (val)
- "Return a fortran representation of enclose syntactic lists."
- (if (listp val)
- (concat "(/" (mapconcat #'org-babel-fortran-transform-list val ", ") "/)")
- (format "%S" val)))
-
-(provide 'ob-fortran)
-
-;;; ob-fortran.el ends here
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