From 7591f5447248a349e9e4048a972560d856084c97 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Mon, 19 Jul 2021 09:08:38 +0800
Subject: new: generate-pragma in c-mode

* c-conf.el (generate-pragma): This generates a pragma for header
  files, and an include statement for C files.
---
 c-conf.el | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/c-conf.el b/c-conf.el
index 2ba0286..e98ddbd 100644
--- a/c-conf.el
+++ b/c-conf.el
@@ -29,6 +29,41 @@
 ;; We can achieve the functionality of the original binding
 ;; comment-region by comment-dwim bound to "M-;".
 (define-key c-mode-map (vector 3 3) #'compile)
+;; This proves to be too convenient not to bind.
+(define-key c-mode-map (vector 'S-tab) #'ff-find-other-file)
+
+;; generate pragmas automatically.
+(define-key c-mode-map (vector ?ù) #'c-generate-pragma)
+
+;;;###autoload
+(defun c-generate-pragma ()
+  "Generate default pragmas for a C header file.
+If invoked on a C file, include the corresponding header file."
+  (interactive)
+  (cond
+   ((not (derived-mode-p 'c-mode 'c++-mode)))
+   ((string-match-p "hp*$"(buffer-name))
+    (insert "#ifndef ")
+    (insert (replace-regexp-in-string
+             "\\." "_"
+             (upcase
+              (file-name-nondirectory
+               (buffer-file-name)))))
+    (newline)
+    (insert "#define ")
+    (insert (replace-regexp-in-string
+             "\\." "_"
+             (upcase
+              (file-name-nondirectory
+               (buffer-file-name)))))
+    (newline 2)
+    (insert "#endif")
+    (forward-line -1))
+   (t
+    (insert (format "#include \"%s\""
+                    (replace-regexp-in-string
+                     "c\\(p*\\)$" "h\\1" (buffer-name))))
+    (newline))))
 
 (provide 'c-conf)
 ;;; c-conf.el ends here
-- 
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