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org-mode/lisp/ob-C.el
Kyle Meyer 72a2db86d9 Merge branch 'bugfix'
2024-01-06 16:02:02 -05:00

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;;; ob-C.el --- Babel Functions for C and Similar Languages -*- lexical-binding: t; -*-
;; Copyright (C) 2010-2024 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Thierry Banel
;; Maintainer: Thierry Banel <tbanelwebmin@free.fr>
;; Keywords: literate programming, reproducible research
;; URL: 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 C, C++, D code.
;;
;; very limited implementation:
;; - currently only support :results output
;; - not much in the way of error feedback
;;; Code:
(require 'org-macs)
(org-assert-version)
(require 'cc-mode)
(require 'ob)
(require 'org-macs)
(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 '("C++" . "cpp"))
(add-to-list 'org-babel-tangle-lang-exts '("D" . "d"))
(defvar org-babel-default-header-args:C '())
(defconst org-babel-header-args:C '((includes . :any)
(defines . :any)
(main . :any)
(flags . :any)
(cmdline . :any)
(libs . :any))
"C/C++-specific header arguments.")
(defconst org-babel-header-args:C++
(append '((namespaces . :any))
org-babel-header-args:C)
"C++-specific header arguments.")
(defcustom org-babel-C-compiler "gcc"
"Command used to compile a C source code file into an executable.
May be either a command in the path, like gcc
or an absolute path name, like /usr/local/bin/gcc
parameter may be used, like gcc -v"
:group 'org-babel
:version "24.3"
:type 'string)
(defcustom org-babel-C++-compiler "g++"
"Command used to compile a C++ source code file into an executable.
May be either a command in the path, like g++
or an absolute path name, like /usr/local/bin/g++
parameter may be used, like g++ -v"
:group 'org-babel
:version "24.3"
:type 'string)
(defcustom org-babel-D-compiler "rdmd"
"Command used to compile and execute a D source code file.
May be either a command in the path, like rdmd
or an absolute path name, like /usr/local/bin/rdmd
parameter may be used, like rdmd --chatty"
:group 'org-babel
:version "24.3"
:type 'string)
(defvar org-babel-c-variant nil
"Internal variable used to hold which type of C (e.g. C or C++ or D)
is currently being evaluated.")
(defun org-babel-execute:cpp (body params)
"Execute BODY according to its header arguments PARAMS.
This function calls `org-babel-execute:C++'."
(org-babel-execute:C++ body params))
(defun org-babel-expand-body:cpp (body params)
"Expand C++ BODY with org-babel according to its header arguments PARAMS."
(org-babel-expand-body:C++ body params))
(defun org-babel-execute:C++ (body params)
"Execute C++ BODY with org-babel according to its header arguments PARAMS.
This function is called by `org-babel-execute-src-block'."
(let ((org-babel-c-variant 'cpp)) (org-babel-C-execute body params)))
(defun org-babel-expand-body:C++ (body params)
"Expand C++ BODY with org-babel according to its header arguments PARAMS."
(let ((org-babel-c-variant 'cpp)) (org-babel-C-expand-C++ body params)))
(defun org-babel-execute:D (body params)
"Execute D BODY with org-babel according to its header arguments PARAMS.
This function is called by `org-babel-execute-src-block'."
(let ((org-babel-c-variant 'd)) (org-babel-C-execute body params)))
(defun org-babel-expand-body:D (body params)
"Expand D BODY with org-babel according to its header arguments PARAMS."
(let ((org-babel-c-variant 'd)) (org-babel-C-expand-D body params)))
(defun org-babel-execute:C (body params)
"Execute a C BODY according to its header arguments PARAMS.
This function is called by `org-babel-execute-src-block'."
(let ((org-babel-c-variant 'c)) (org-babel-C-execute body params)))
(defun org-babel-expand-body:C (body params)
"Expand C BODY according to its header arguments PARAMS."
(let ((org-babel-c-variant 'c)) (org-babel-C-expand-C body params)))
(defun org-babel-C-execute (body params)
"Execute C/C++/D BODY according to its header arguments PARAMS.
This function should only be called by `org-babel-execute:C' or
`org-babel-execute:C++' or `org-babel-execute:D'."
(let* ((tmp-src-file (org-babel-temp-file
"C-src-"
(pcase org-babel-c-variant
(`c ".c") (`cpp ".cpp") (`d ".d"))))
(tmp-bin-file ;not used for D
(org-babel-process-file-name
(org-babel-temp-file "C-bin-" org-babel-exeext)))
(cmdline (cdr (assq :cmdline params)))
(cmdline (if cmdline (concat " " cmdline) ""))
(flags (cdr (assq :flags params)))
(flags (mapconcat 'identity
(if (listp flags) flags (list flags)) " "))
(libs (org-babel-read
(or (cdr (assq :libs params))
(org-entry-get nil "libs" t))
nil))
(libs (mapconcat #'identity
(if (listp libs) libs (list libs))
" "))
(full-body
(pcase org-babel-c-variant
(`c (org-babel-C-expand-C body params))
(`cpp (org-babel-C-expand-C++ body params))
(`d (org-babel-C-expand-D body params)))))
(with-temp-file tmp-src-file (insert full-body))
(pcase org-babel-c-variant
((or `c `cpp)
(org-babel-eval
(format "%s -o %s %s %s %s"
(pcase org-babel-c-variant
(`c org-babel-C-compiler)
(`cpp org-babel-C++-compiler))
tmp-bin-file
flags
(org-babel-process-file-name tmp-src-file)
libs)
""))
(`d nil)) ;; no separate compilation for D
(let ((results
(org-babel-eval
(pcase org-babel-c-variant
((or `c `cpp)
(concat tmp-bin-file cmdline))
(`d
(format "%s %s %s %s"
org-babel-D-compiler
flags
(org-babel-process-file-name tmp-src-file)
cmdline)))
"")))
(when results
(setq results (org-remove-indentation results))
(org-babel-reassemble-table
(org-babel-result-cond (cdr (assq :result-params params))
results
(let ((tmp-file (org-babel-temp-file "c-")))
(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-C-expand-C++ (body params)
"Expand C/C++ BODY with according to its header arguments PARAMS."
(org-babel-C-expand-C body params))
(defun org-babel-C-expand-C (body params)
"Expand C/C++ BODY according to its header arguments PARAMS."
(let ((vars (org-babel--get-vars params))
(colnames (cdr (assq :colname-names params)))
(main-p (not (string= (cdr (assq :main params)) "no")))
(includes (org-babel-read
(cdr (assq :includes params))
nil))
(defines (org-babel-read
(cdr (assq :defines params))
nil))
(namespaces (org-babel-read
(cdr (assq :namespaces params))
nil))
(prologue (cdr (assq :prologue params)))
(epilogue (cdr (assq :epilogue params))))
(when (stringp includes)
(setq includes (split-string includes)))
(when (stringp namespaces)
(setq namespaces (split-string namespaces)))
(when (stringp defines)
(let ((y nil)
(result (list t)))
(dolist (x (split-string defines))
(if (null y)
(setq y x)
(nconc result (list (concat y " " x)))
(setq y nil)))
(setq defines (cdr result))))
(setq body
(concat
(and prologue (concat prologue "\n"))
body
(and epilogue (concat "\n" epilogue "\n"))))
(mapconcat 'identity
(list
;; includes
(mapconcat
(lambda (inc)
;; :includes '(<foo> <bar>) gives us a list of
;; symbols; convert those to strings.
(when (symbolp inc) (setq inc (symbol-name inc)))
(if (string-prefix-p "<" inc)
(format "#include %s" inc)
(format "#include \"%s\"" inc)))
includes "\n")
;; defines
(mapconcat
(lambda (inc) (format "#define %s" inc))
(if (listp defines) defines (list defines)) "\n")
;; namespaces
(mapconcat
(lambda (inc) (format "using namespace %s;" inc))
namespaces
"\n")
;; variables
(mapconcat 'org-babel-C-var-to-C vars "\n")
;; table sizes
(mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
;; tables headers utility
(when colnames
(org-babel-C-utility-header-to-C))
;; tables headers
(mapconcat (lambda (head)
(let* ((tblnm (car head))
(tbl (cdr (car (let* ((el vars))
(while (not (or (equal tblnm (caar el)) (not el)))
(setq el (cdr el)))
el))))
(type (org-babel-C-val-to-base-type tbl)))
(org-babel-C-header-to-C head type))) colnames "\n")
;; body
(if main-p
(org-babel-C-ensure-main-wrap body)
body) "\n") "\n")))
(defun org-babel-C-expand-D (body params)
"Expand D BODY according to its header arguments PARAMS."
(let ((vars (org-babel--get-vars params))
(colnames (cdr (assq :colname-names params)))
(main-p (not (string= (cdr (assq :main params)) "no")))
(imports (or (cdr (assq :imports params))
(org-babel-read (org-entry-get nil "imports" t)))))
(when (stringp imports)
(setq imports (split-string imports)))
(setq imports (append imports '("std.stdio" "std.conv")))
(mapconcat 'identity
(list
"module mmm;"
;; imports
(mapconcat
(lambda (inc) (format "import %s;" inc))
imports "\n")
;; variables
(mapconcat 'org-babel-C-var-to-C vars "\n")
;; table sizes
(mapconcat 'org-babel-C-table-sizes-to-C vars "\n")
;; tables headers utility
(when colnames
(org-babel-C-utility-header-to-C))
;; tables headers
(mapconcat (lambda (head)
(let* ((tblnm (car head))
(tbl (cdr (car (let* ((el vars))
(while (not (or (equal tblnm (caar el)) (not el)))
(setq el (cdr el)))
el))))
(type (org-babel-C-val-to-base-type tbl)))
(org-babel-C-header-to-C head type))) colnames "\n")
;; body
(if main-p
(org-babel-C-ensure-main-wrap body)
body) "\n") "\n")))
(defun org-babel-C-ensure-main-wrap (body)
"Wrap BODY in a \"main\" function call if none exists."
(if (string-match "^[ \t]*[intvod]+[ \t\n\r]*main[ \t]*(.*)" body)
body
(format "int main() {\n%s\nreturn 0;\n}\n" body)))
(defun org-babel-prep-session:C (_session _params)
"Throw and error that sessions are not supported.
This function does nothing as C is a compiled language with no support
for sessions."
(error "C is a compiled language -- no support for sessions"))
(defun org-babel-load-session:C (_session _body _params)
"Throw and error that sessions are not supported.
This function does nothing as C is a compiled language with no support
for sessions."
(error "C is a compiled language -- no support for sessions"))
;; helper functions
(defun org-babel-C-format-val (type val)
"Handle the FORMAT part of TYPE with the data from VAL."
(let ((format-data (cadr type)))
(if (stringp format-data)
(cons "" (format format-data val))
(funcall format-data val))))
(defun org-babel-C-val-to-C-type (val)
"Determine the type of VAL.
Return a list (TYPE-NAME FORMAT). TYPE-NAME should be the name of the type.
FORMAT can be either a format string or a function which is called with VAL."
(let* ((basetype (org-babel-C-val-to-base-type val))
(type
(pcase basetype
(`integerp '("int" "%d"))
(`floatp '("double" "%s")) ;; %f rounds, use %s to print the float literally
(`stringp
(list
(if (eq org-babel-c-variant 'd) "string" "const char*")
"\"%s\""))
(_ (error "Unknown type %S" basetype)))))
(cond
((integerp val) type) ;; an integer declared in the #+begin_src line
((floatp val) type) ;; a numeric declared in the #+begin_src line
((and (listp val) (listp (car val))) ;; a table
`(,(car type)
(lambda (val)
(cons
(pcase org-babel-c-variant
((or `c `cpp) (format "[%d][%d]" (length val) (length (car val))))
(`d (format "[%d][%d]" (length (car val)) (length val))))
(concat
(if (eq org-babel-c-variant 'd) "[\n" "{\n")
(mapconcat
(lambda (v)
(concat
(if (eq org-babel-c-variant 'd) " [" " {")
(mapconcat (lambda (w) (format ,(cadr type) w)) v ",")
(if (eq org-babel-c-variant 'd) "]" "}")))
val
",\n")
(if (eq org-babel-c-variant 'd) "\n]" "\n}"))))))
((or (listp val) (vectorp val)) ;; a list declared in the #+begin_src line
`(,(car type)
(lambda (val)
(cons
(format "[%d]" (length val))
(concat
(if (eq org-babel-c-variant 'd) "[" "{")
(mapconcat (lambda (v) (format ,(cadr type) v)) val ",")
(if (eq org-babel-c-variant 'd) "]" "}"))))))
(t ;; treat unknown types as string
type))))
(defun org-babel-C-val-to-base-type (val)
"Determine the base type of VAL.
The type is:
- `integerp' if all base values are integers;
- `floatp' if all base values are either floating points or integers;
- `stringp' otherwise."
(cond
((integerp val) 'integerp)
((floatp val) 'floatp)
((or (listp val) (vectorp val))
(let ((type nil))
(mapc (lambda (v)
(pcase (org-babel-C-val-to-base-type v)
(`stringp (setq type 'stringp))
(`floatp
(when (or (not type) (eq type 'integerp))
(setq type 'floatp)))
(`integerp
(unless type (setq type 'integerp)))))
val)
type))
(t 'stringp)))
(defun org-babel-C-var-to-C (pair)
"Convert PAIR of (var . val) C variable assignment."
;; 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))))
(let* ((type-data (org-babel-C-val-to-C-type val))
(type (car type-data))
(formatted (org-babel-C-format-val type-data val))
(suffix (car formatted))
(data (cdr formatted)))
(pcase org-babel-c-variant
((or `c `cpp)
(format "%s %s%s = %s;"
type
var
suffix
data))
(`d
(format "%s%s %s = %s;"
type
suffix
var
data))))))
(defun org-babel-C-table-sizes-to-C (pair)
"Create constants of table dimensions, if PAIR is a table."
(when (listp (cdr pair))
(cond
((listp (cadr pair)) ;; a table
(concat
(format "const int %s_rows = %d;" (car pair) (length (cdr pair)))
"\n"
(format "const int %s_cols = %d;" (car pair) (length (cadr pair)))))
(t ;; a list declared in the #+begin_src line
(format "const int %s_cols = %d;" (car pair) (length (cdr pair)))))))
(defun org-babel-C-utility-header-to-C ()
"Generate a utility function to convert a column name into a column number."
(pcase org-babel-c-variant
((or `c `cpp)
(concat
"
#ifndef _STRING_H
#include <string.h>
#endif
int get_column_num (int nbcols, const char** header, const char* column)
{
int c;
for (c=0; c<nbcols; c++)
if (strcmp(header[c],column)==0)
return c;
return -1;
}
"))
(`d
"int get_column_num (string[] header, string column)
{
foreach (c, h; header)
if (h==column)
return to!int(c);
return -1;
}
")))
(defun org-babel-C-header-to-C (head type)
"Convert an elisp list of header table into a C or D vector
specifying a variable with the name of the table."
(message "%S" type)
(let ((table (car head))
(headers (cdr head))
(typename (pcase type
(`integerp "int")
(`floatp "double")
(`stringp (pcase org-babel-c-variant
((or `c `cpp) "const char*")
(`d "string"))))))
(concat
(pcase org-babel-c-variant
((or `c `cpp)
(format "const char* %s_header[%d] = {%s};"
table
(length headers)
(mapconcat (lambda (h) (format "\"%s\"" h)) headers ",")))
(`d
(format "string[%d] %s_header = [%s];"
(length headers)
table
(mapconcat (lambda (h) (format "\"%s\"" h)) headers ","))))
"\n"
(pcase org-babel-c-variant
((or `c `cpp)
(format
"%s %s_h (int row, const char* col) { return %s[row][get_column_num(%d,%s_header,col)]; }"
typename table table (length headers) table))
(`d
(format
"%s %s_h (size_t row, string col) { return %s[row][get_column_num(%s_header,col)]; }"
typename table table table))))))
(provide 'ob-C)
;;; ob-C.el ends here
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