Implemented basic syntax highlighting.

.gitignore

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+*~
+\#*

krl-mode.el

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+(defvar krl-mode-hook nil)
+(defvar krl-mode-map
+  (let ((map (make-keymap)))
+    (define-key map "\C-j" 'newline-and-indent)
+    map)
+  "Keymap for KRL major mode")
+
+(add-to-list 'auto-mode-alist '("\\.src\\'" . krl-mode))
+(add-to-list 'auto-mode-alist '("\\.dat\\'" . krl-mode))
+(add-to-list 'auto-mode-alist '("\\.sub\\'" . krl-mode))
+
+(defconst krl-keywords
+  '(
+    "DEF"
+    "END"
+    "DEFDAT"
+    "ENDDAT"
+    "DEFFCT"
+    "ENDFCT"
+    "DECL"
+    "RETURN"
+    "FOR"
+    "TO"
+    "ENDFOR"
+    "WHILE"
+    "ENDWHILE"
+    "IF"
+    "THEN"
+    "ELSE"
+    "ENDIF"
+    "SWITCH"
+    "CASE"
+    "ENDSWITCH"
+    "LOOP"
+    "ENUM"
+    "NOT"
+    "AND"
+    "OR"
+    "EXOR"
+    "B_NOT"
+    "B_AND"
+    "B_OR"
+    "B_EXOR"
+    "INTERRUPT"
+    "WHEN"
+    "DO"
+                                        ; TODO: Add more stuff.
+    ))
+
+(defconst krl-warning-keywords
+  '(
+    "HALT"
+    "BRAKE"
+    "EXIT"
+    "WAIT"
+    ))
+
+(defconst krl-types
+  '(
+    "CHAR"
+    "INT"
+    "REAL"
+    "AXIS"
+    "E6AXIS"
+    "POS"
+    "E6POS"
+    ))
+
+(defconst krl-constants
+  '(
+    "TRUE"
+    "FALSE"
+    "$NULLFRAME"
+    "$ROBROOT"
+    ))
+
+(defconst krl-builtins
+  '(
+                                        ; Motion
+    "BAS"
+    "PTP"
+    "PTP_REL"
+    "LIN"
+    "CIRC"
+                                        ; Num functions
+    "ABS"
+    "SQRT"
+    "SIN"
+    "COS"
+    "TAN"
+    "ACOS"
+    "ATAN2"
+                                        ; String functions
+    "StrDeclLen"
+    "StrLen"
+    "StrClear"
+    "StrAdd"
+    "StrFind"
+    "StrComp"
+    "StrCopy"
+    "SWRITE"
+    "SREAD"
+                                        ; Magic
+    "CWRITE"
+    "CREAD"
+    ))
+
+(defconst krl-font-lock-keywords
+  (list
+   (cons (concat "\\<" (regexp-opt krl-keywords t) "\\>") 'font-lock-keyword-face)
+   (cons (concat "\\<" (regexp-opt krl-types t) "\\>") 'font-lock-type-face)
+   (cons (concat "\\<" (regexp-opt krl-warning-keywords t) "\\>") 'font-lock-warning-face)
+   (cons (concat "\\<" (regexp-opt krl-constants t) "\\>") 'font-lock-constant-face)
+   '("\\(#\\w*\\)" . font-lock-constant-face)  ; Enum constants
+   (cons (concat "\\<" (regexp-opt krl-builtins t) "\\>") 'font-lock-builtin-face)
+   '("\\($\\w*\\)" . font-lock-variable-name-face)  ; System variables
+   )
+  "Highlighting expressions for KRL mode")
+
+(defvar krl-mode-syntax-table
+  (let ((st (make-syntax-table)))
+    (modify-syntax-entry ?_ "w" st)
+    (modify-syntax-entry ?\; "<" st)
+    (modify-syntax-entry ?& "<" st)
+    (modify-syntax-entry ?\n ">" st)
+    st)
+  "Syntax table for krl-mode")
+
+(defun krl-mode ()
+  "Major mode for editing KRL files"
+  (interactive)
+  (kill-all-local-variables)
+  (set-syntax-table krl-mode-syntax-table)
+  (use-local-map krl-mode-map)
+  (set (make-local-variable 'font-lock-defaults) '(krl-font-lock-keywords))
+  (setq major-mode 'krl-mode)
+  (setq mode-name "KRL")
+  (run-hooks 'krl-mode-hook))
+
+(provide 'krl-mode)