c-conf: re-bind and add include function

* c-conf.el (durand-c-prefix-map): Bind the pragma and the include
  functions.

(c-mode-map): Bind the prefix map.

(durand-c-include): Generate the include directives automatically.

1 files changed, 43 insertions, 2 deletions

diff --git a/c-conf.el b/c-conf.el
index e98ddbd..b6cad71 100644
--- a/c-conf.el
+++ b/c-conf.el
@@ -2,7 +2,7 @@
 
 ;; Copyright (C) 2021  李俊緯
 
-;; Author: 李俊緯 <durand@MacBook-Pro-de-Severe.local>
+;; Author: Durand <mmemmew@gmail.com>
 ;; Keywords: c, convenience, languages
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -32,8 +32,17 @@
 ;; This proves to be too convenient not to bind.
 (define-key c-mode-map (vector 'S-tab) #'ff-find-other-file)
 
+;;; prefix map
+(defvar durand-c-prefix-map '(keymap)
+  "The keymap of my custom functions.
+This will be bound to the key ù.")
+
+(let ((map durand-c-prefix-map))
+  (define-key map (vector ?i) #'durand-c-include)
+  (define-key map (vector ?p) #'c-generate-pragma))
+
 ;; generate pragmas automatically.
-(define-key c-mode-map (vector ?ù) #'c-generate-pragma)
+(define-key c-mode-map (vector ?ù) durand-c-prefix-map)
 
 ;;;###autoload
 (defun c-generate-pragma ()
@@ -65,5 +74,37 @@ If invoked on a C file, include the corresponding header file."
                      "c\\(p*\\)$" "h\\1" (buffer-name))))
     (newline))))
 
+;;;###autoload
+(defun durand-c-include (&optional arg)
+  "Include a library.
+If ARG is non-nil, ask for the type of the include: whether the
+angle bracket type or the quote type."
+  (interactive)
+  (let* ((library (read-string "Include: "))
+         (type (cond
+                ((null arg)
+                 (cond
+                  ((string-match-p "^\\(std\\|string.h\\)" library)
+                   'angle)
+                  ('quote)))
+                (t
+                 (intern
+                  (completing-read "Which type? "
+                                   '("angle" "quote")
+                                   nil t))))))
+    (save-restriction
+      (widen)
+      (save-excursion
+        (goto-char (point-min))
+        (re-search-forward "^#include" nil t)
+        (forward-line 0)
+        (insert "#include "
+                (cond ((eq type 'angle) "<")
+                      ((eq type 'quote) "\""))
+                library
+                (cond ((eq type 'angle) ">")
+                      ((eq type 'quote) "\""))
+                "\n")))))
+
 (provide 'c-conf)
 ;;; c-conf.el ends here