add utf8_char_t struct

.gitea/workflows/build.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   build:
-    runs-on: giorgio-runner
+    runs-on: ubuntu-latest
 
     steps:
       - name: Checkout code

README.md

@@ -1,6 +1,7 @@
 # Beluga
 
 Beluga is a project of CLI text editor that uses lisp as configuration language.
+It's abviously only working for **Linux**.
 
 ## Requirements
 
@@ -10,7 +11,7 @@ You will only need **meson** and a **C compiler** to compile the editor.
 ### From source
 Here is the installation line for development version:
 
-```git clone https://git.giorgio-nas.fr/arthur/beluga.git && cd beluga && meson setup build && meson compile -C build```
+```git clone https://homelinuxserver.ddns.net/git/arthur/beluga.git ~/.beluga && cd ~/.beluga && meson setup build && meson compile -C build```
 
 The executable file will be `build/beluga`. Feel free to add it to your path.
 
@@ -25,8 +26,8 @@ To open an existing file just type :
 
 Here is some few command that you will need :
 
-| keybind       | command          |
-|---------------|------------------|
-| Ctrl-x Ctrl-c | leave the editor |
-| Ctrl-x Ctrl-s | Save a file      |
-| Ctrl-x f      | open file        |
+| keybind| command          |
+|--------|------------------|
+| Ctrl-Q | leave the editor |
+| Ctrl-S | Save a file      |
+| Ctrl-O | open file        |

assets/beluga.txt

@@ -9,12 +9,12 @@
     #----------------------------------------------------------##                   
    #=--------------------------------------------------------------##                
   +--------------------------+@#-%*-----------------------------------#*         
-  +--------------------------%@@@@#-------------------------------------**                              BELUGA - VERSION 2.2.1
+  +--------------------------%@@@@#-------------------------------------**                              BELUGA - VERSION 1.1
   *-=-------------------------#@@*---------------------------------------=%
   %*#==--------------------------------------------------------------------+#                           ----- KEY-BINDS -----
-  *%%=-=--------------------------------------------------------------------=#                          CTRL-x CTRL-c  leave
-  %=--------------------------------------------------------------------------#*                        CTRL-x CTRL-s   save
- %-----------------------------------------------------------------------------**                       CTRL-x f   open-file
+  *%%=-=--------------------------------------------------------------------=#                          CTRL-q         leave
+  %=--------------------------------------------------------------------------#*                        CTRL-s          save
+ %-----------------------------------------------------------------------------**                       CTRL-o     open-file
 *+--=---===----=---------------=*-----------------------------------------------** 
  #--=##      *#%#*+==----==+**+----------------------=  ***=---------------------% 
  *%**=-----------====    ==---------------------------------=+#+-----------------=#                                 

config/init.lisp

@@ -3,11 +3,6 @@
 (define TAB-LENGTH 4)
 (define QUIT-TIMES 1)
 
-;; PACKAGES
-
-;; First git clone it
-;; (add-package "smart_delimiters")
-
 ;; FUNCTIONS
 
 (define editor-delete-next-char (lambda () (
@@ -18,67 +13,22 @@
   )
 
 
-(define (char-between ch lo hi)
-  (if (char>=? ch lo)
-      (char<=? ch hi)
-      #f))
+;; KEY MAPPING
 
-(define (alphanumericp ch)
-  (if ch
-      (if (char-between ch #\a #\z)
-          #t
-          (if (char-between ch #\A #\Z)
-              #t
-              (if (char-between ch #\0 #\9)
-                  #t
-                  #f)))
-      #f))
+(map-key "CTRL-q" editor-quit)
+(map-key "CTRL-d" editor-save)
+(map-key "ARROW-UP" '(move-cursor "up"))
+(map-key "ARROW-DOWN" '(move-cursor "down"))
+(map-key "ARROW-RIGHT" '(move-cursor "right"))
+(map-key "ARROW-LEFT" '(move-cursor "left"))
+(map-key "ENTER" editor-insert-new-line)
+(map-key "CTRL-a" move-cursor-beg-line)
+(map-key "CTRL-e" move-cursor-end-line)
+(map-key "BACKSPACE" editor-delete-previous-char)
+(map-key "DEL" editor-delete-next-char)
+(map-key "PAGE-UP" move-cursor-page-up)
+(map-key "PAGE-DOWN" move-cursor-page-down)
+(map-key "CTRL-o" editor-open-file)
+(map-key "CTRL-k" editor-del-row)
+(map-key "CTRL-s" editor-find)
 
-
-(define (word-char-p ch)
-  (if (alphanumericp ch)
-      #t
-      #f))
-
-(define editor-move-to-end-of-word (lambda () (
-  (if (word-char-p (editor-read-char))
-	((move-cursor "right")
-	(editor-move-to-end-of-word))
-    ))
-                                     ))
-
-(define enter-and-tab 
-  (lambda () 
-    (editor-insert-new-line)
-    (let ((is-in (move-cursor "up")))
-      (do ((ch (editor-read-char) (editor-read-char)))
-          ((and (not (char=? ch #\space)) is-in) #f)
-        (move-cursor "down")
-        (editor-insert-char " ")
-        (set! is-in (move-cursor "up")))
-      (move-cursor "down"))))
-
-(add-prefix "user")
-
-
-
-(map-key "CTRL-x" '(editor-set-prefix "user") "no-prefix")
-(map-key "CTRL-g" '(editor-set-prefix "no-prefix") "user")
-(map-key "CTRL-c" editor-quit "user")
-(map-key "CTRL-s" editor-save "user")
-(map-key "ARROW-UP" '(move-cursor "up") "no-prefix")
-(map-key "ARROW-DOWN" '(move-cursor "down") "no-prefix")
-(map-key "ARROW-RIGHT" '(move-cursor "right") "no-prefix")
-(map-key "ARROW-LEFT" '(move-cursor "left") "no-prefix")
-(map-key "ENTER" enter-and-tab "no-prefix")
-(map-key "CTRL-a" move-cursor-beg-line "no-prefix")
-(map-key "CTRL-e" move-cursor-end-line "no-prefix")
-(map-key "BACKSPACE" editor-delete-previous-char "no-prefix")
-(map-key "DEL" editor-delete-next-char "no-prefix")
-(map-key "PAGE-UP" move-cursor-page-up "no-prefix")
-(map-key "PAGE-DOWN" move-cursor-page-down "no-prefix")
-(map-key "f" editor-open-file "user")
-(map-key "TAB" editor-insert-tab "no-prefix")
-(map-key "CTRL-k" editor-del-row "no-prefix")
-(map-key "CTRL-s" editor-find "no-prefix")
-(map-key "CTRL-r" editor-move-to-end-of-word "no-prefix")

include/append_buffer.h

@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-void abAppend(struct abuf *ab, const char *s, int len);
+void abAppend(struct abuf *ab, const unsigned char *s, int len);
 
 void abFree(struct abuf *ab);
 

include/builtins.h

@@ -19,8 +19,6 @@ Lisp moveCursorBeginLine(Lisp args, LispError *e, LispContext ctx);
 
 Lisp moveCursorEndLine(Lisp args, LispError *e, LispContext ctx);
 
-Lisp l_editorInserTab(Lisp args, LispError *e, LispContext ctx);
-
 Lisp deletePreviousChar(Lisp args, LispError *e, LispContext ctx);
 
 Lisp editorMoveCursorPageUp(Lisp args, LispError* e, LispContext ctx);
@@ -39,10 +37,4 @@ Lisp editorFind_L(Lisp args, LispError *e, LispContext ctx);
 
 Lisp editorReadChar_L(Lisp args, LispError *e, LispContext ctx);
 
-Lisp editorSetPrefix(Lisp args, LispError *e, LispContext ctx);
-
-Lisp editorPrefix(Lisp args, LispError *e, LispContext ctx);
-
-void free_structs(void);
-
 #endif

include/data.h

@@ -7,6 +7,12 @@
 
 #include "lisp.h"
 
+
+typedef struct{
+  unsigned char c[4];
+  char len;
+} utf_8_char_t;
+
 /**
  * \struct erow
  * \brief Store one editor row
@@ -16,8 +22,8 @@
 typedef struct erow {
   int size;     /**< Size of the line */
   int rsize;    /**< Size of the render line */
-  char *chars;  /**< Characters of the line */
-  char *render; /**< The actual line we will print */
+  utf_8_char_t *chars;  /**< Characters of the line */
+  utf_8_char_t *render; /**< The actual line we will print */
 } erow;
 
 enum editorStatus_e {
@@ -31,16 +37,45 @@ struct const_t {
   int QUIT_TIMES;
 };
 
-struct prefix_t {
-  char prefix_name[64];
-  int prefix_id;
-};
+// Key types
+typedef enum {
+    KEY_CHAR,           // Regular character or UTF-8
+    KEY_CTRL,           // Ctrl+letter
+    KEY_ALT,            // Alt+letter
+    KEY_ARROW,          // Arrow keys
+    KEY_FUNCTION,       // Function keys
+    KEY_SPECIAL,        // Tab, Enter, ESC, Backspace, etc.
+    KEY_NAVIGATION,     // Home, End, PgUp, PgDn, Insert, Delete
+    KEY_UNKNOWN
+} KeyType;
+
+// Modifiers
+typedef enum {
+    MOD_NONE = 0,
+    MOD_SHIFT = 1,
+    MOD_ALT = 2,
+    MOD_CTRL = 4
+} KeyModifier;
+
+// Key information structure
+typedef struct {
+    KeyType type;
+    int modifiers;      // Bitmask of KeyModifier
+    union {
+        unsigned int codepoint;  // For KEY_CHAR
+        char ctrl_char;          // For KEY_CTRL (A-Z)
+        char alt_char;           // For KEY_ALT
+        char arrow;              // For KEY_ARROW (U/D/L/R)
+        int function_num;        // For KEY_FUNCTION (1-12)
+        char special;            // For KEY_SPECIAL and KEY_NAVIGATION
+    } data;
+    utf_8_char_t c;  // Raw bytes
+} KeyInfo;
+
 
 struct keyBind_t {
-  char *key_sequence;
-  int prefix_id;
+  KeyInfo *key_sequence;
   Lisp command;
-  
 };
 
 /**
@@ -59,7 +94,6 @@ struct editorConfig {
   int dirty;
   char *filename;
   enum editorStatus_e state;
-  int prefix_state;
   char status_msg[80];
   time_t status_msg_time;
   struct termios orig_termios; /**< Terminal communication interface */
@@ -67,7 +101,6 @@ struct editorConfig {
   struct const_t constantes;
   int quit_times_buffer;
 
-  char *init_file_path;
   FILE *fd_init_file;
   Lisp env;
   LispContext ctx;     /** Lisp context */
@@ -76,9 +109,6 @@ struct editorConfig {
 
   struct keyBind_t* key_binds;
   int number_of_keybinds;
-  
-  struct prefix_t* prefix;
-  int number_of_prefix;
 
 };
 
@@ -88,7 +118,7 @@ struct editorConfig {
  * */
 
 struct abuf {
-  char *b; /**< Text that will be printed */
+  unsigned char *b; /**< Text that will be printed */
   int len; /**< Length of the text */
 };
 

include/define.h

@@ -8,19 +8,10 @@
 #define HIDE_CURSOR "\x1b[?25l"
 #define SHOW_CURSOR "\x1b[?25h"
 #define ERASE_END_LINE "\x1b[K"
+#define TAB "\x09"
+#define SPACE "\x20"
+
 
-enum editorKey {
-  BACKSPACE = 127,
-  ARROW_LEFT = 1000,
-  ARROW_RIGHT,
-  ARROW_UP,
-  ARROW_DOWN,
-  DEL_KEY,
-  BEG_LINE,
-  END_LINE,
-  PAGE_UP,
-  PAGE_DOWN,
-};
 
 #define ABUF_INIT {NULL, 0}
 

include/editor_op.h

@@ -2,9 +2,9 @@
 #define EDITOR_OP_H_
 
 #include "data.h"
-void editorInsertChar(int c);
+void editorInsertChar(utf_8_char_t *c);
 
-void editorInsertNewLine();
+void editorInsertNewLine(void);
 
 void editorDelChar();
 

include/input.h

@@ -24,9 +24,9 @@ char *editorPrompt(char *prompt, char * PlaceHolder, char bPathMode);
 
 char *key_to_string(int key);
 
-int editorMoveCursor(int key);
+void editorMoveCursor(KeyInfo * key);
 
-int executeKeyBind(char *key_sequence);
+int executeKeyBind(KeyInfo *key_sequence);
 
 /**
  * \fn void editorProcessKeypress()

include/lisp.h

@@ -1861,8 +1861,8 @@ static Lisp parse_symbol_(Lexer* lex, LispContext ctx)
     char scratch[LISP_IDENTIFIER_MAX];
     size_t length = lexer_copy_token(lex, 0, LISP_IDENTIFIER_MAX, scratch);
     // always convert symbols to uppercase
-    //   for (int i = 0; i < length; ++i)
-    //    scratch[i] = toupper(scratch[i]);
+    for (int i = 0; i < length; ++i)
+        scratch[i] = toupper(scratch[i]);
     return symbol_intern_(ctx.p->symbols, scratch, length, ctx);
 }
 
@@ -2075,10 +2075,8 @@ static Lisp parse(Lexer* lex, LispError* out_error, LispContext ctx)
         result = lisp_cons(get_sym(SYM_BEGIN, ctx), lisp_list_reverse(result), ctx);
     }
 
-    if (out_error)
-      *out_error = error;
+    if (out_error) *out_error = error;
     return result;
-
 }
 
 Lisp lisp_read(const char *program, LispError* out_error, LispContext ctx)
@@ -2124,7 +2122,6 @@ void* fread_all_(FILE* file, size_t* out_size) {
                 return NULL;
             }
             data = new_data;
-            memset(data + *out_size, 0, cap - *out_size);
         }
 
         size_t read = fread(data + *out_size, 1, BLOCK_SIZE, file);
@@ -3186,17 +3183,17 @@ LispContext lisp_init(void)
     ctx.p->macros = lisp_make_table(ctx);
 
     Lisp* c = ctx.p->symbol_cache;
-    c[SYM_IF] = lisp_make_symbol("if", ctx);
-    c[SYM_BEGIN] = lisp_make_symbol("begin", ctx);
-    c[SYM_QUOTE] = lisp_make_symbol("quote", ctx);
-    c[SYM_QUASI_QUOTE] = lisp_make_symbol("quasiquote", ctx);
-    c[SYM_UNQUOTE] = lisp_make_symbol("unquote", ctx);
-    c[SYM_UNQUOTE_SPLICE] = lisp_make_symbol("unquotesplice", ctx);
-    c[SYM_DEFINE] = lisp_make_symbol("_def", ctx);
-    c[SYM_DEFINE_MACRO] = lisp_make_symbol("define-macro", ctx);
-    c[SYM_SET] = lisp_make_symbol("_set!", ctx);
+    c[SYM_IF] = lisp_make_symbol("IF", ctx);
+    c[SYM_BEGIN] = lisp_make_symbol("BEGIN", ctx);
+    c[SYM_QUOTE] = lisp_make_symbol("QUOTE", ctx);
+    c[SYM_QUASI_QUOTE] = lisp_make_symbol("QUASIQUOTE", ctx);
+    c[SYM_UNQUOTE] = lisp_make_symbol("UNQUOTE", ctx);
+    c[SYM_UNQUOTE_SPLICE] = lisp_make_symbol("UNQUOTESPLICE", ctx);
+    c[SYM_DEFINE] = lisp_make_symbol("_DEF", ctx);
+    c[SYM_DEFINE_MACRO] = lisp_make_symbol("DEFINE-MACRO", ctx);
+    c[SYM_SET] = lisp_make_symbol("_SET!", ctx);
     c[SYM_LAMBDA] = lisp_make_symbol("/\\_", ctx);
-    c[SYM_CONS] = lisp_make_symbol("cons", ctx);
+    c[SYM_CONS] = lisp_make_symbol("CONS", ctx);
     return ctx;
 }
 

include/lisp_lib.h

@@ -36,7 +36,7 @@ static const char* lib_0_sequences_src_ =
            (if (pair? args) \n\
                (if (pair? (cdr args)) \n\
                    (if (pair? (cdr (cdr args))) \n\
-                       `(/\\_ ,(car args) ,(cons 'begin (cdr args))) \n\
+                       `(/\\_ ,(car args) ,(cons 'BEGIN (cdr args))) \n\
                        `(/\\_ ,(car args) ,(car (cdr args)))) \n\
                    (syntax-error \"lambda missing body expressions: (lambda (args) body)\")) \n\
                (syntax-error \"lambda missing argument: (lambda (args) body)\")))) \n\
@@ -44,18 +44,18 @@ static const char* lib_0_sequences_src_ =
 (define-macro set! (lambda (var x) \n\
                      (begin \n\
                        (if (not (symbol? var)) (syntax-error \"set! not a variable\")) \n\
-                       `(_set! ,var ,x)))) \n\
+                       `(_SET! ,var ,x)))) \n\
  \n\
 (define-macro define \n\
               (lambda (var . exprs) \n\
                 (if (symbol? var) \n\
                     (if (pair? (cdr exprs)) \n\
                         (syntax-error \"define: (define var x)\") \n\
-                        `(_def ,var ,(car exprs))) \n\
+                        `(_DEF ,var ,(car exprs))) \n\
                     (if (pair? var) \n\
-                        `(_def ,(car var) \n\
-                               (lambda ,(cdr var) \n\
-                                       ,(if (null? (cdr exprs)) (car exprs) (cons 'begin exprs)))) \n\
+                        `(_DEF ,(car var) \n\
+                               (LAMBDA ,(cdr var) \n\
+                                       ,(if (null? (cdr exprs)) (car exprs) (cons 'BEGIN exprs)))) \n\
                         (syntax-error \"define: not a symbol\") )))) \n\
   \n\
 (define (first x) (car x))  \n\
@@ -98,13 +98,13 @@ static const char* lib_0_sequences_src_ =
 (define (_expand-shorthand-body path)  \n\
   (if (null? path) (cons 'pair '())  \n\
       (list (if (char=? (car path) #\\A)  \n\
-            (cons 'car (_expand-shorthand-body (cdr path)))))))  \n\
+            (cons 'CAR (_expand-shorthand-body (cdr path)))))))  \n\
  \n\
 (define (_expand-shorthand text)  \n\
-  (cons 'define  (cons (list (string->symbol (string-append \"C\" text \"R\")) 'pair)  \n\
+  (cons 'DEFINE  (cons (list (string->symbol (string-append \"C\" text \"R\")) 'pair)  \n\
         (_expand-shorthand-body (string->list text)))))  \n\
  \n\
-(define-macro _shorthand-accessors (lambda args (cons 'begin (map1 _expand-shorthand args))))  \n\
+(define-macro _shorthand-accessors (lambda args (cons 'BEGIN (map1 _expand-shorthand args))))  \n\
  \n\
 (define (vector . args) (list->vector args)) \n\
  \n\
@@ -124,14 +124,14 @@ static const char* lib_0_sequences_src_ =
 
 static const char* lib_1_forms_src_ = 
 "(define (_make-lambda args body)  \n\
-  (list 'lambda args (if (null? (cdr body)) (car body) (cons 'begin body))))  \n\
+  (list 'LAMBDA args (if (null? (cdr body)) (car body) (cons 'BEGIN body))))  \n\
   \n\
  \n\
-; (let <name> ((<var0> <expr0>) ... (<varN> <expr1>)) <body0> ... <bodyN>) \n\
-;  => ((lambda (<var0> ... <varN>) (begin <body0> ... <bodyN>)) <expr0> ... <expr1>)             \n\
+; (LET <name> ((<var0> <expr0>) ... (<varN> <expr1>)) <body0> ... <bodyN>) \n\
+;  => ((LAMBDA (<var0> ... <varN>) (BEGIN <body0> ... <bodyN>)) <expr0> ... <expr1>)             \n\
 ;  => named  \n\
 ;    ((lambda () \n\
-;        (define <name> (lambda (<var0> ... <varN>) (begin <body0> ... <bodyN>))) \n\
+;        (define <name> (LAMBDA (<var0> ... <varN>) (BEGIN <body0> ... <bodyN>))) \n\
 ;        (<name> <expr0> ... <exprN>))) \n\
  \n\
 (define (_check-binding-list bindings)  \n\
@@ -145,7 +145,7 @@ static const char* lib_1_forms_src_ =
   (define initial-args (map1 (lambda (entry) (second entry)) bindings))  \n\
   (if (null? var)  \n\
       (cons body-func initial-args)  \n\
-      (list (_make-lambda '() (list (list 'define var body-func) (cons var initial-args))))))  \n\
+      (list (_make-lambda '() (list (list 'DEFINE var body-func) (cons var initial-args))))))  \n\
  \n\
 (define-macro let (lambda args   \n\
                     (if (pair? (first args))  \n\
@@ -153,8 +153,8 @@ static const char* lib_1_forms_src_ =
                         (_let->combination (first args) (second args) (cdr (cdr args))))))  \n\
  \n\
 (define (_let*-helper bindings body)  \n\
-  (if (null? bindings) (if (null? (cdr body)) (car body) (cons 'begin body))  \n\
-      (list 'let (list (car bindings)) (_let*-helper (cdr bindings) body))))  \n\
+  (if (null? bindings) (if (null? (cdr body)) (car body) (cons 'BEGIN body))  \n\
+      (list 'LET (list (car bindings)) (_let*-helper (cdr bindings) body))))  \n\
  \n\
 (define-macro let* (lambda (bindings . body)  \n\
                      (_check-binding-list bindings)  \n\
@@ -163,17 +163,17 @@ static const char* lib_1_forms_src_ =
 (define-macro letrec (lambda (bindings . body)  \n\
                        (_check-binding-list bindings)  \n\
                        (cons (_make-lambda (map1 (lambda (entry) (first entry)) bindings)  \n\
-                                           (append (map1 (lambda (entry) (list 'set! (first entry) (second entry)))  \n\
+                                           (append (map1 (lambda (entry) (list 'SET! (first entry) (second entry)))  \n\
                                                          bindings) body))  \n\
                              (map1 (lambda (entry) '()) bindings))))  \n\
  \n\
  \n\
-; (cond (<pred0> <expr0>) \n\
+; (COND (<pred0> <expr0>) \n\
 ;       (<pred1> <expr1>) \n\
 ;        ... \n\
 ;        (else <expr-1>))  \n\
 ; => \n\
-; (if <pred0> <expr0> \n\
+; (IF <pred0> <expr0> \n\
 ;      (if <pred1> <expr1> \n\
 ;          .... \n\
 ;      (if <predN> <exprN> <expr-1>)) ... ) \n\
@@ -187,11 +187,11 @@ static const char* lib_1_forms_src_ =
  \n\
 (define (_cond-helper clauses)  \n\
   (if (null? clauses) '()  \n\
-      (if (eq? (car (car clauses)) 'else)  \n\
-          (cons 'begin (cdr (car clauses)))  \n\
-          (list 'if  \n\
+      (if (eq? (car (car clauses)) 'ELSE)  \n\
+          (cons 'BEGIN (cdr (car clauses)))  \n\
+          (list 'IF  \n\
                 (car (car clauses))  \n\
-                (cons 'begin (cdr (car clauses)))  \n\
+                (cons 'BEGIN (cdr (car clauses)))  \n\
                 (_cond-helper (cdr clauses))))))  \n\
  \n\
 (define-macro cond (lambda clauses  \n\
@@ -206,26 +206,26 @@ static const char* lib_2_forms_src_ =
   (cond ((null? preds) #t)  \n\
         ((null? (cdr preds)) (car preds))  \n\
         (else  \n\
-          `(if ,(car preds) ,(_and-helper (cdr preds)) #f))))  \n\
+          `(IF ,(car preds) ,(_and-helper (cdr preds)) #f))))  \n\
 (define-macro and (lambda preds (_and-helper preds)))  \n\
  \n\
 (define (_or-helper preds var)  \n\
   (cond ((null? preds) #f)  \n\
         ((null? (cdr preds)) (car preds))  \n\
         (else  \n\
-          `(begin (set! ,var ,(car preds))  \n\
-                  (if ,var ,var ,(_or-helper (cdr preds) var))))))  \n\
+          `(BEGIN (SET! ,var ,(car preds))  \n\
+                  (IF ,var ,var ,(_or-helper (cdr preds) var))))))  \n\
  \n\
 (define-macro or (lambda preds  \n\
                    (let ((var (gensym)))  \n\
-                     `(let ((,var '())) ,(_or-helper preds var)))))  \n\
+                     `(LET ((,var '())) ,(_or-helper preds var)))))  \n\
  \n\
 (define-macro case (lambda (key . clauses)  \n\
                      (let ((expr (gensym)))  \n\
-                       `(let ((,expr ,key))  \n\
-                          ,(cons 'cond (map1 (lambda (entry)  \n\
+                       `(LET ((,expr ,key))  \n\
+                          ,(cons 'COND (map1 (lambda (entry)  \n\
                                                (cons (if (pair? (car entry))  \n\
-                                                         `(memv ,expr (quote ,(car entry)))  \n\
+                                                         `(MEMV ,expr (quote ,(car entry)))  \n\
                                                          (car entry))  \n\
                                                      (cdr entry))) clauses))))))  \n\
  \n\
@@ -234,24 +234,23 @@ static const char* lib_2_forms_src_ =
                 `(begin (set! ,l (cons ,v ,l)) ,l)))  \n\
  \n\
 ; (DO ((<var0> <init0> <step0>) ...)  (<test> <result>) <body>) \n\
+(define-macro do  \n\
+              (lambda (vars loop-check . loops)  \n\
+                (let ( (names '()) (inits '()) (steps '()) (f (gensym)) )  \n\
+                  (for-each1 (lambda (var)  \n\
+                               (push (car var) names)  \n\
+                               (set! var (cdr var))  \n\
+                               (push (car var) inits)  \n\
+                               (set! var (cdr var))  \n\
+                               (push (car var) steps)) vars)  \n\
+                  `((LAMBDA ()  \n\
+                      (DEFINE ,f (LAMBDA ,names  \n\
+                                   (IF ,(car loop-check)  \n\
+                                       ,(if (pair? (cdr loop-check)) (car (cdr loop-check)) '())  \n\
+                                       ,(cons 'BEGIN (append loops (list (cons f steps)))) )))  \n\
+                      ,(cons f inits)  \n\
+                      )) )))  \n\
  \n\
-(define-macro do   \n\
-  (lambda (vars loop-check . loops)   \n\
-    (let ( (names '()) (inits '()) (steps '()) (f (gensym)) )   \n\
-      (for-each1 (lambda (var-spec)   \n\
-                   (push (car var-spec) names) \n\
-                   (push (car (cdr var-spec)) inits) \n\
-                   (if (pair? (cdr (cdr var-spec))) \n\
-                       (push (car (cdr (cdr var-spec))) steps) \n\
-                       (push (car var-spec) steps))) vars)   \n\
-      `((lambda ()   \n\
-          (define ,f (lambda ,names   \n\
-                       (if ,(car loop-check)   \n\
-                           ,(if (pair? (cdr loop-check)) (car (cdr loop-check)) '())   \n\
-                           ,(cons 'begin (append loops (list (cons f steps)))) )))   \n\
-          ,(cons f inits)   \n\
-          )) ))) \n\
-\n\
 (define-macro dotimes  \n\
               (lambda (form body)  \n\
                 (apply (lambda (i n . result)  \n\
@@ -263,18 +262,18 @@ static const char* lib_2_forms_src_ =
 (define-macro swap! \n\
               (lambda (x y) \n\
                 (let ((temp (gensym))) \n\
-                  `(let ((,temp ,x)) \n\
-                        (set! ,temp ,x) \n\
-                        (set! ,x ,y) \n\
-                        (set! ,y ,temp))))) \n\
+                  `(LET ((,temp ,x)) \n\
+                        (SET! ,temp ,x) \n\
+                        (SET! ,x ,y) \n\
+                        (SET! ,y ,temp))))) \n\
  \n\
 (define-macro inc! ; CL incf \n\
               (lambda (x) \n\
-                `(set! ,x (+ ,x 1)))) \n\
+                `(SET! ,x (+ ,x 1)))) \n\
  \n\
 (define-macro dec! ; CL decf \n\
               (lambda (x) \n\
-                `(set! ,x (- ,x 1))))";
+                `(SET! ,x (- ,x 1))))";
 
 static const char* lib_3_math_src_ = 
 "(define (number? x) (real? x))  \n\
@@ -446,7 +445,7 @@ static const char* lib_4_sequences_src_ =
 
 static const char* lib_5_streams_src_ = 
 "(define-macro delay (lambda (expr) \n\
-                      `(make-promise ,(cons 'lambda \n\
+                      `(make-promise ,(cons 'LAMBDA \n\
                                             (cons '() \n\
                                                   (cons expr '())))))) \n\
  \n\
@@ -1927,178 +1926,182 @@ static Lisp sch_is_cont(Lisp args, LispError* e, LispContext ctx)
 
 static const LispFuncDef lib_cfunc_defs[] = {
     
-    { "error", sch_error },
-    { "syntax-error", sch_syntax_error },
+    { "ERROR", sch_error },
+    { "SYNTAX-ERROR", sch_syntax_error },
 
-    // Output Procedures
-    { "_write", sch_write },
-    { "_display", sch_display },
-    { "_write-char", sch_write_char },
-    { "_flush-output-port", sch_flush },
-    { "_read", sch_read },
-    { "input-port?", sch_is_port_in },
-    { "output-port?", sch_is_port_out },
-    { "open-input-file", sch_open_input },
-    { "open-output-file", sch_open_output },
-    { "close-input-port", sch_port_close },
-    { "close-output-port", sch_port_close },
-    { "eof-object?", sch_is_eof },
+    // Output Procedures https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Output-Procedures.html
+    { "_WRITE", sch_write },
+    { "_DISPLAY", sch_display },
+    { "_WRITE-CHAR", sch_write_char },
+    { "_FLUSH-OUTPUT-PORT", sch_flush },
+    { "_READ", sch_read },
+    { "INPUT-PORT?", sch_is_port_in },
+    { "OUTPUT-PORT?", sch_is_port_out },
+    { "OPEN-INPUT-FILE", sch_open_input },
+    { "OPEN-OUTPUT-FILE", sch_open_output },
+    { "CLOSE-INPUT-PORT", sch_port_close },
+    { "CLOSE-OUTPUT-PORT", sch_port_close },
+    { "EOF-OBJECT?", sch_is_eof },
     
-    // Universal Time
-    { "get-universal-time", sch_univeral_time },
-    { "print-gc-statistics", sch_print_gc_stats },
+    // Universal Time https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Universal-Time.html
+    { "GET-UNIVERSAL-TIME", sch_univeral_time },
+    { "PRINT-GC-STATISTICS", sch_print_gc_stats },
     
-    { "macroexpand", sch_macroexpand },
+    { "MACROEXPAND", sch_macroexpand },
     
-    // Equivalence Predicates
-    { "eq?", sch_exact_eq },
-    { "eqv?", sch_equal },
-    { "equal?", sch_equal_r },
+    // Equivalence Predicates https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Equivalence-Predicates.html
+    { "EQ?", sch_exact_eq },
+    { "EQV?", sch_equal },
+    { "EQUAL?", sch_equal_r },
     
-    // Booleans
-    { "boolean?", sch_is_boolean },
-    { "not", sch_not },
+    // Booleans https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Booleans.html
+    { "BOOLEAN?", sch_is_boolean },
+    { "NOT", sch_not },
 
     // PAIRS
-    { "cons", sch_cons },
-    { "car", sch_car },
-    { "cdr", sch_cdr },
-    { "set-car!", sch_set_car },
-    { "set-cdr!", sch_set_cdr },
-    { "null?", sch_is_null },
-    { "pair?", sch_is_pair },
+    { "CONS", sch_cons },
+    { "CAR", sch_car },
+    { "CDR", sch_cdr },
+    { "SET-CAR!", sch_set_car },
+    { "SET-CDR!", sch_set_cdr },
+    { "NULL?", sch_is_null },
+    { "PAIR?", sch_is_pair },
 
-    // Lists
-    { "list", sch_list },
-    { "list?", sch_is_list },
-    { "make-list", sch_make_list },
-    { "list-copy", sch_list_copy },
-    { "length", sch_length },
-    { "append", sch_append },
-    { "append-reverse!", sch_append_reverse },
-    { "list-ref", sch_list_ref },
-    { "nthcdr", sch_list_advance },
+    // Lists https://groups.csail.mit.edu/mac/ftpdir/scheme-7.4/doc-html/scheme_8.html
+    { "LIST", sch_list },
+    { "LIST?", sch_is_list },
+    { "MAKE-LIST", sch_make_list },
+    { "LIST-COPY", sch_list_copy },
+    { "LENGTH", sch_length },
+    { "APPEND", sch_append },
+    { "APPEND-REVERSE!", sch_append_reverse },
+    { "LIST-REF", sch_list_ref },
+    { "NTHCDR", sch_list_advance },
 
-    // Vectors
-    { "vector?", sch_is_vector },
-    { "make-vector", sch_make_vector },
-    { "vector-grow", sch_vector_grow },
-    { "vector-length", sch_vector_length },
-    { "vector-set!", sch_vector_set },
-    { "vector-swap!", sch_vector_swap },
-    { "vector-ref", sch_vector_ref },
-    { "vector-fill!", sch_vector_fill },
-    { "vector-assq", sch_vector_assq },
-    { "subvector", sch_subvector },
-    { "list->vector", sch_list_to_vector },
-    { "vector->list", sch_vector_to_list },
+    // Vectors https://groups.csail.mit.edu/mac/ftpdir/scheme-7.4/doc-html/scheme_9.html#SEC82
+    { "VECTOR?", sch_is_vector },
+    { "MAKE-VECTOR", sch_make_vector },
+    { "VECTOR-GROW", sch_vector_grow },
+    { "VECTOR-LENGTH", sch_vector_length },
+    { "VECTOR-SET!", sch_vector_set },
+    { "VECTOR-SWAP!", sch_vector_swap },
+    { "VECTOR-REF", sch_vector_ref },
+    { "VECTOR-FILL!", sch_vector_fill },
+    { "VECTOR-ASSQ", sch_vector_assq },
+    { "SUBVECTOR", sch_subvector },
+    { "LIST->VECTOR", sch_list_to_vector },
+    { "VECTOR->LIST", sch_vector_to_list },
 
-    // Strings
-    { "string?", sch_is_string },
-    { "make-string", sch_make_string },
-    { "string=?", sch_equal_r },
-    { "string<?", sch_string_less },
-    { "substring", sch_substring },
-    { "string-null?", sch_string_is_null },
-    { "string-length", sch_string_length },
-    { "string-ref", sch_string_ref },
-    { "string-set!", sch_string_set },
-    { "string-upcase", sch_string_upcase },
-    { "string-downcase", sch_string_downcase },
-    { "string-append", sch_string_append },
-    { "string->list", sch_string_to_list },
-    { "list->string", sch_list_to_string },
-    { "string->number", sch_string_to_number },
-    { "number->string", sch_number_to_string },
+    // Strings https://groups.csail.mit.edu/mac/ftpdir/scheme-7.4/doc-html/scheme_7.html#SEC61
+    { "STRING?", sch_is_string },
+    { "MAKE-STRING", sch_make_string },
+    { "STRING=?", sch_equal_r },
+    { "STRING<?", sch_string_less },
+    { "SUBSTRING", sch_substring },
+    { "STRING-NULL?", sch_string_is_null },
+    { "STRING-LENGTH", sch_string_length },
+    { "STRING-REF", sch_string_ref },
+    { "STRING-SET!", sch_string_set },
+    { "STRING-UPCASE", sch_string_upcase },
+    { "STRING-DOWNCASE", sch_string_downcase },
+    { "STRING-APPEND", sch_string_append },
+    { "STRING->LIST", sch_string_to_list },
+    { "LIST->STRING", sch_list_to_string },
+    { "STRING->NUMBER", sch_string_to_number },
+    { "NUMBER->STRING", sch_number_to_string },
 
-    // Characters
-    { "char?", sch_is_char },
-    { "char=?", sch_equals },
-    { "char<?", sch_char_less },
+    // Characters https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Characters.html#Characters
+    { "CHAR?", sch_is_char },
+    { "CHAR=?", sch_equals },
+    { "CHAR<?", sch_char_less },
 
-    { "char-upcase", sch_char_upcase },
-    { "char-downcase", sch_char_downcase },
-    { "char-whitespace?", sch_char_is_white },
-    { "char-alphanumeric?", sch_char_is_alphanum },
-    { "char-alphabetic?", sch_char_is_alpha },
-    { "char-numeric?", sch_char_is_number },
-    { "char->integer", sch_char_to_int },
+    { "CHAR-UPCASE", sch_char_upcase },
+    { "CHAR-DOWNCASE", sch_char_downcase },
+    { "CHAR-WHITESPACE?", sch_char_is_white },
+    { "CHAR-ALPHANUMERIC?", sch_char_is_alphanum },
+    { "CHAR-ALPHABETIC?", sch_char_is_alpha },
+    { "CHAR-NUMERIC?", sch_char_is_number },
+    { "CHAR->INTEGER", sch_char_to_int },
 
-    // Numerical operations
+    // Association Lists https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Association-Lists.html
+    // Numerical operations https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Numerical-operations.html
     { "=", sch_equals },
     { "+", sch_add },
     { "-", sch_sub },
     { "*", sch_mult },
     { "/", sch_divide },
     { "<", sch_less },
-    { "integer?", sch_is_int },
-    { "even?", sch_is_even },
-    { "real?", sch_is_real },
-    { "exp", sch_exp },
-    { "expt", sch_power },
-    { "log", sch_log },
-    { "sin", sch_sin },
-    { "cos", sch_cos },
-    { "tan", sch_tan },
-    { "atan", sch_atan },
-    { "sqrt", sch_sqrt },
-    { "round", sch_round },
-    { "floor", sch_floor },
-    { "ceiling", sch_ceiling },
-    { "quotient", sch_quotient },
-    { "remainder", sch_remainder },
-    { "modulo", sch_modulo },
-    { "abs", sch_abs },
-    { "magnitude", sch_abs },
-    { "exact?", sch_is_int },
-    { "exact->inexact", sch_to_inexact },
-    { "inexact->exact", sch_to_exact },
+    { "INTEGER?", sch_is_int },
+    { "EVEN?", sch_is_even },
+    { "REAL?", sch_is_real },
+    { "EXP", sch_exp },
+    { "EXPT", sch_power },
+    { "LOG", sch_log },
+    { "SIN", sch_sin },
+    { "COS", sch_cos },
+    { "TAN", sch_tan },
+    { "ATAN", sch_atan },
+    { "SQRT", sch_sqrt },
+    { "ROUND", sch_round },
+    { "FLOOR", sch_floor },
+    { "CEILING", sch_ceiling },
+    { "QUOTIENT", sch_quotient },
+    { "REMAINDER", sch_remainder },
+    { "MODULO", sch_modulo },
+    { "ABS", sch_abs },
+    { "MAGNITUDE", sch_abs },
+    { "EXACT?", sch_is_int },
+    { "EXACT->INEXACT", sch_to_inexact },
+    { "INEXACT->EXACT", sch_to_exact },
     
-    // Symbols
-    { "symbol?", sch_is_symbol },
-    { "symbol<?", sch_symbol_less },
-    { "string->symbol", sch_string_to_symbol },
-    { "symbol->string", sch_symbol_to_string },
-    { "generate-uninterned-symbol", sch_gensym },
-    { "gensym", sch_gensym },
+    // Symbols https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Symbols.html
+    { "SYMBOL?", sch_is_symbol },
+    { "SYMBOL<?", sch_symbol_less },
+    { "STRING->SYMBOL", sch_string_to_symbol },
+    { "SYMBOL->STRING", sch_symbol_to_string },
+    { "GENERATE-UNINTERNED-SYMBOL", sch_gensym },
+    { "GENSYM", sch_gensym },
 
-    // Environments
-    { "eval", sch_eval },
-    { "scheme-report-environment", sch_system_env },
-    { "interaction-environment", sch_user_env },
+    // Environments https://groups.csail.mit.edu/mac/ftpdir/scheme-7.4/doc-html/scheme_14.html
+    { "EVAL", sch_eval },
+    { "SCHEME-REPORT-ENVIRONMENT", sch_system_env },
+    { "INTERACTION-ENVIRONMENT", sch_user_env },
+    // { "THE-ENVIRONMENT", sch_current_env },
     
-    // Hash Tables
-    { "hash-table?", sch_is_table },
-    { "make-hash-table", sch_table_make },
-    { "hash-table-set!", sch_table_set },
-    { "hash-table-ref", sch_table_get },
-    { "hash-table-size", sch_table_size },
-    { "hash-table->alist", sch_table_to_alist },
+    // Hash Tables https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Basic-Hash-Table-Operations.html#Basic-Hash-Table-Operations
+    { "HASH-TABLE?", sch_is_table },
+    { "MAKE-HASH-TABLE", sch_table_make },
+    { "HASH-TABLE-SET!", sch_table_set },
+    { "HASH-TABLE-REF", sch_table_get },
+    { "HASH-TABLE-SIZE", sch_table_size },
+    { "HASH-TABLE->ALIST", sch_table_to_alist },
 
-    { "promise?", sch_is_promise },
-    { "make-promise", sch_make_promise },
-    { "_promise-procedure", sch_promise_proc },
-    { "_promise-store!", sch_promise_store },
-    { "promise-value", sch_promise_val },
-    { "promise-forced?", sch_promise_forced },
+    { "PROMISE?", sch_is_promise },
+    { "MAKE-PROMISE", sch_make_promise },
+    { "_PROMISE-PROCEDURE", sch_promise_proc },
+    { "_PROMISE-STORE!", sch_promise_store },
+    { "PROMISE-VALUE", sch_promise_val },
+    { "PROMISE-FORCED?", sch_promise_forced },
     
-    // Procedures
-    { "apply", sch_apply },
-    { "compiled-procedure?", sch_is_func },
-    { "compound-procedure?", sch_is_lambda },
-    { "procedure-environment", sch_lambda_env },
-    { "procedure-body", sch_lambda_body },
-    { "call/cc", sch_call_cc },
-    { "continuation?", sch_is_cont },
+    // Procedures https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Procedure-Operations.html#Procedure-Operations
+    { "APPLY", sch_apply },
+    { "COMPILED-PROCEDURE?", sch_is_func },
+    { "COMPOUND-PROCEDURE?", sch_is_lambda },
+    { "PROCEDURE-ENVIRONMENT", sch_lambda_env },
+    // TOOD: Almost standard
+    { "PROCEDURE-BODY", sch_lambda_body },
+    { "CALL/CC", sch_call_cc },
+    { "CONTINUATION?", sch_is_cont },
 
-    // Random Numbers
-    { "random", sch_pseudo_rand },
-    { "random-seed!", sch_pseudo_seed },
+    // Random Numbers https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-ref/Random-Numbers.html
+    { "RANDOM", sch_pseudo_rand },
+    { "RANDOM-SEED!", sch_pseudo_seed },
    
-    // Garbage Collection
-    { "gc-flip", sch_gc_flip },
+    // Garbage Collection https://www.gnu.org/software/mit-scheme/documentation/mit-scheme-user/Garbage-Collection.html
+    { "GC-FLIP", sch_gc_flip },
     
     { NULL, NULL }
+    
 };
 
 void lisp_lib_load(LispContext ctx)
@@ -2108,14 +2111,14 @@ void lisp_lib_load(LispContext ctx)
 
     lisp_table_set(
             table,
-            lisp_make_symbol("_current-output-port", ctx),
+            lisp_make_symbol("_CURRENT-OUTPUT-PORT", ctx),
             lisp_make_port(stdout, 0),
             ctx
             );
 
     lisp_table_set(
             table,
-            lisp_make_symbol("_current-input-port", ctx),
+            lisp_make_symbol("_CURRENT-INPUT-PORT", ctx),
             lisp_make_port(stdin, 1),
             ctx
             );

include/row_op.h

@@ -20,7 +20,7 @@ void editorFreeRow(erow *row);
 
 void editorDelRow(int at);
 
-void editorRowInsertChar(erow *row, int at, int c);
+void editorRowInsertChar(erow *row, int at, utf_8_char_t c);
 
 void editorRowAppendString(erow *row, char *s, size_t len);
 

include/syntax_highlighter.h

@@ -1,20 +0,0 @@
-#define COLOR_RESET "\033[0m"
-#define COLOR_KEYWORD "\033[1;35m" // Bold magenta
-#define COLOR_TYPE "\033[1;34m"    // Bold blue
-#define COLOR_STRING "\033[1;32m"  // Bold green
-#define COLOR_COMMENT "\033[0;36m" // Cyan
-#define COLOR_NUMBER "\033[1;33m"  // Bold yellow
-#define COLOR_DEFAULT "\033[0;37m" // White
-
-// Token types
-typedef enum {
-  TOKEN_KEYWORD,
-  TOKEN_TYPE,
-  TOKEN_STRING,
-  TOKEN_COMMENT,
-  TOKEN_NUMBER,
-  TOKEN_OPERATOR,
-  TOKEN_DEFAULT
-} TokenType;
-
-char *highlight_line(const char * line, int *length);

include/terminal.h

@@ -25,10 +25,12 @@ void disableRawMode();
 
 void enableRawMode();
 
-int editorReadKey();
+KeyInfo * editorReadKey();
 
 int getCursorPosition(int *rows, int *cols);
 
+KeyInfo *stringToCodepoint(const char *string);
+
 int getWindowSize(int *rows, int *cols);
 
 #endif

install.sh

@@ -17,8 +17,8 @@ fi
 echo "Create config files ..."
 mkdir -pv ~/.beluga/
 cp -rv ./assets/ ~/.beluga/
-mkdir -pv ~/.beluga/packages/
 mkdir -pv ~/.beluga/config/
+mkdir -pv ~/.beluga/packages/
 
 read -p "Do you want to replace your config file or keep it (init.lisp.bak) / (init.lisp.new) ? (Y/n)" confirm
 if [[ "$confirm" =~ ^[Yy]$ ]]; then

main.c

@@ -21,11 +21,19 @@
 #include "include/output.h"
 #include "include/terminal.h"
 
+#include <locale.h>
+#include <wchar.h>
+
 struct editorConfig E;
 
 int main(int argc, char *argv[]) {
 
   char * splash_screen = (char *) calloc(256, sizeof(char));
+
+  // Set support for utf-8
+  setlocale(LC_ALL, "");
+
+  // INIT
   
   enableRawMode();
   initEditor();
@@ -40,7 +48,7 @@ int main(int argc, char *argv[]) {
   }
   free(splash_screen);
 
-  editorSetStatusMessage("HELP: Ctrl-x Ctrl-s = save | Ctrl-x Ctrl-q = quit");
+  editorSetStatusMessage("HELP: Ctrl-S = save | Ctrl-Q = quit");
 
 
   while (1) {

meson.build

@@ -13,7 +13,6 @@ src_files = files(
   'main.c',
   'src/append_buffer.c',
   'src/editor_op.c',
-  'src/syntax_highlighter.c',
   'src/file_io.c',
   'src/init.c',
   'src/input.c',

src/append_buffer.c

@@ -2,8 +2,8 @@
 
 extern struct editorConfig E;
 
-void abAppend(struct abuf *ab, const char *s, int len) {
-  char *new = realloc(ab->b, ab->len + len);
+void abAppend(struct abuf *ab, const unsigned char *s, int len) {
+  unsigned char *new = realloc(ab->b, ab->len + len);
 
   if (new == NULL) {
     return;

src/builtins.c

@@ -1,459 +1,195 @@
-/**
- * @file builtins.c
- * @brief Built-in Lisp functions for editor operations
- * @details Provides Lisp bindings for core editor functionality including
- * cursor movement, file operations, keybinding management, and text manipulation
- */
-
 #include "../include/builtins.h"
-#include "../include/data.h"
 #include "../include/define.h"
-#include "../include/editor_op.h"
-#include "../include/file_io.h"
 #include "../include/input.h"
+#include "../include/file_io.h"
+#include "../include/editor_op.h"
 #include "../include/row_op.h"
-#include "include/output.h"
+#include "../include/data.h"
+#include "../include/terminal.h"
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-/**
- * @brief Finds a prefix configuration by name
- * @details Searches the prefix array for a prefix matching the given name.
- * Returns the first prefix (default) if no match is found.
- * @param prefix_name Name of the prefix to search for (max 64 chars)
- * @return Matching prefix_t structure, or E.prefix[0] if not found
- * @note Updates global editor state E
- */
-struct prefix_t find_prefix(const char prefix_name[64]) {
-  int i = E.number_of_prefix + 1;
-  while (i--) {
-    if (!strcmp(prefix_name, E.prefix[i].prefix_name)) {
-      return E.prefix[i];
-    }
-  }
-  return E.prefix[0];
+utf_8_char_t make_utf8_char(const char *bytes, int len) {
+  utf_8_char_t ch;
+  ch.len = len;
+  memcpy(ch.c, bytes, len);
+  return ch;
 }
 
-/**
- * @brief Lisp function to bind a command to a key sequence
- * @details Registers a keybinding with an associated Lisp command and optional
- * prefix modifier. Dynamically extends the keybind array.
- * @param args Lisp list of 3 arguments: (key-sequence command prefix-name)
- *        - key_sequence (string): The key or key combination to bind
- *        - command (Lisp): The Lisp command/function to execute
- *        - prefix_name (string): Prefix modifier name
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E (key_binds array)
- */
 Lisp mapKey(Lisp args, LispError *e, LispContext ctx) {
-  /*
-   * 3 arguments keybind command prefix
-   */
-  const char *key_sequence = lisp_string(lisp_car(args));
+  const char *key_string = lisp_string(lisp_car(args));
+  KeyInfo *key = stringToCodepoint(key_string);
   args = lisp_cdr(args);
   // second argument
   Lisp func = lisp_car(args);
 
-  E.key_binds = (struct keyBind_t *)realloc(
-      E.key_binds, ++E.number_of_keybinds * sizeof(struct keyBind_t));
-  E.key_binds[E.number_of_keybinds - 1].key_sequence =
-      (char *)malloc(50 * sizeof(char));
+  E.key_binds =
+      (struct keyBind_t *)realloc(E.key_binds, ++E.number_of_keybinds * sizeof(struct keyBind_t));
+  E.key_binds[E.number_of_keybinds - 1].key_sequence = (KeyInfo *) malloc(sizeof(KeyInfo));
 
-  strncpy(E.key_binds[E.number_of_keybinds - 1].key_sequence, key_sequence, 50);
+  memcpy(E.key_binds[E.number_of_keybinds - 1].key_sequence, key, sizeof(KeyInfo));
 
   E.key_binds[E.number_of_keybinds - 1].command = func;
 
-  // Third argument
-  args = lisp_cdr(args);
-  const char *prefix_name = lisp_string(lisp_car(args));
-  struct prefix_t prefix = find_prefix(prefix_name);
-
-  E.key_binds[E.number_of_keybinds - 1].prefix_id = prefix.prefix_id;
-  
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to move cursor in a specified direction
- * @details Moves the editor cursor up, down, left, or right based on direction string.
- * @param args Lisp list with one argument: direction string
- *        - "u": up, "d": down, "r": right, "l": left
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return Lisp boolean indicating whether movement was valid
- * @note Updates global editor state E
- * @see editorMoveCursor()
- */
 Lisp moveCursor(Lisp args, LispError *e, LispContext ctx) {
   const char *direction = lisp_string(lisp_car(args));
-  int is_in = 0;
+  KeyInfo key;
+  key.type = KEY_ARROW; 
   switch (direction[0]) {
   case 'u':
-    is_in = editorMoveCursor(ARROW_UP);
+    key.data.arrow = 'A';
     break;
   case 'd':
-    is_in = editorMoveCursor(ARROW_DOWN);
+    key.data.arrow = 'B';
     break;
   case 'r':
-    is_in = editorMoveCursor(ARROW_RIGHT);
+    key.data.arrow = 'C';
     break;
   case 'l':
-    is_in = editorMoveCursor(ARROW_LEFT);
+    key.data.arrow = 'D';
     break;
   }
-  fprintf(stderr, "move lisp %d\n", is_in);
-  return lisp_make_bool(is_in);
+  editorMoveCursor(&key);
+
+
+  return lisp_null();
 }
 
-/**
- * @brief Frees all dynamically allocated editor structures
- * @details Releases memory for prefix table, keybinds, filename, and all rows.
- * Called during shutdown to prevent memory leaks.
- * @note Updates global editor state E
- */
-void free_structs(void) {
-  int i;
-  free(E.prefix);
-  for (i = 0; i < E.number_of_keybinds; ++i) {
-    free(E.key_binds[i].key_sequence);
-  }
-  free(E.key_binds);
-  free(E.filename);
-  for (i = 0; i < E.numrows; ++i) {
-    free(E.row[i].render);
-    free(E.row[i].chars);
-  }
-  free(E.row);
-  free(E.init_file_path);
-  fclose(E.fd_init_file);
-  
-}
-
-/**
- * @brief Lisp function to quit the editor
- * @details Closes editor with unsaved changes protection. Prompts user to confirm
- * quit after multiple attempts if file is dirty. Cleans up resources and restores terminal.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null() (never returns on successful exit)
- * @note Calls exit(0) to terminate program
- * @note Updates quit_times_buffer counter
- * @see free_structs()
- */
-Lisp editorQuit(Lisp args, LispError *e, LispContext ctx) {
+Lisp editorQuit(Lisp args, LispError* e, LispContext ctx) {
+  fprintf(stderr, "quit\n");
   if (E.dirty && E.quit_times_buffer > 0) {
     editorSetStatusMessage("WARNING! Changes hasn't been saved. Press Ctrl-Q "
                            "another time to quit.");
     --E.quit_times_buffer;
     return lisp_null();
   }
-  free_structs();
   write(STDOUT_FILENO, "\x1b[2J", 4);
   write(STDOUT_FILENO, CURSOR_TOP_LEFT, 3);
   disableRawMode();
-  lisp_shutdown(E.ctx);
   exit(0);
 
   return lisp_null();
+
+  
 }
 
-/**
- * @brief Lisp function to save the current file
- * @details Wrapper around editorSave() for use in Lisp keybindings.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @see editorSave()
- */
-Lisp l_editorSave(Lisp args, LispError *e, LispContext ctx) {
+
+Lisp l_editorSave(Lisp args, LispError* e, LispContext ctx) {
 
   editorSave();
-
+  
   return lisp_null();
+
+  
 }
 
-/**
- * @brief Lisp function to insert a new line at cursor
- * @details Wrapper around editorInsertNewLine() for use in Lisp keybindings.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @see editorInsertNewLine()
- */
-Lisp l_editorInsertNewLine(Lisp args, LispError *e, LispContext ctx) {
-
-  editorInsertNewLine();
+Lisp l_editorInsertNewLine(Lisp args, LispError* e, LispContext ctx) {
 
+  // editorInsertNewLine();
+  
   return lisp_null();
+
+  
 }
 
-/**
- * @brief Lisp function to insert a tab (spaces) at cursor
- * @details Inserts TAB_LENGTH spaces at the current cursor position.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Uses E.constantes.TAB_LENGTH for indentation width
- */
-Lisp l_editorInserTab(Lisp args, LispError *e, LispContext ctx) {
-
-  for (int i = 0; i<E.constantes.TAB_LENGTH; ++i) {
-    editorInsertChar(' ');
-  }
-
-  return lisp_null();
-}
-
-/**
- * @brief Lisp function to move cursor to beginning of line
- * @details Moves cursor to column 0 of the current line.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- */
 Lisp moveCursorBeginLine(Lisp args, LispError *e, LispContext ctx) {
   E.cursor_x = 0;
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to move cursor to end of line
- * @details Moves cursor to the end of the current line content.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- */
-Lisp moveCursorEndLine(Lisp args, LispError *e, LispContext ctx) {
+Lisp moveCursorEndLine(Lisp args, LispError* e, LispContext ctx) {
   if (E.cursor_y < E.numrows) {
     E.cursor_x = E.row[E.cursor_y].size;
   }
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to delete character before cursor
- * @details Wrapper around editorDelChar() for use in Lisp keybindings.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @see editorDelChar()
- */
-Lisp deletePreviousChar(Lisp args, LispError *e, LispContext ctx) {
+
+Lisp deletePreviousChar(Lisp args, LispError* e, LispContext ctx) {
   editorDelChar();
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to move cursor up by one screen
- * @details Scrolls up one full screen height, moving cursor to top of visible area.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- * @see editorMoveCursor()
- */
-Lisp editorMoveCursorPageUp(Lisp args, LispError *e, LispContext ctx) {
+Lisp editorMoveCursorPageUp(Lisp args, LispError* e, LispContext ctx) {
   E.cursor_y = E.row_offset;
   int times = E.screenrows;
+  KeyInfo key;
+  key.type = KEY_ARROW;
+  key.data.arrow = 'D';
   while (--times) {
-    editorMoveCursor(ARROW_UP);
+    editorMoveCursor(&key);
   }
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to move cursor down by one screen
- * @details Scrolls down one full screen height, moving cursor to bottom of visible area.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- * @see editorMoveCursor()
- */
-Lisp editorMoveCursorPageDown(Lisp args, LispError *e, LispContext ctx) {
+Lisp editorMoveCursorPageDown(Lisp args, LispError* e, LispContext ctx) {
   E.cursor_y = E.row_offset + E.screenrows - 1;
   if (E.cursor_y > E.numrows) {
     E.cursor_y = E.numrows;
   }
   int times = E.screenrows;
+  KeyInfo key;
+  key.type = KEY_ARROW;
+  key.data.arrow = 'D';
   while (--times) {
-    editorMoveCursor(ARROW_DOWN);
+    editorMoveCursor(&key);
   }
 
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to open a file
- * @details Prompts user for filename and opens the file for editing.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- * @see editorOpen()
- * @see editorPrompt()
- */
 Lisp editorOpenFile(Lisp args, LispError *e, LispContext ctx) {
   char *filename = editorPrompt("Open : %s", getenv("PWD"), 1);
-  if (filename){
+  if (filename)
     editorOpen(filename);
-  }
-  free(filename);
-  
 
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to insert a character
- * @details Extracts a character from Lisp string argument and inserts it at cursor.
- * @param args Lisp list with one string argument
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Uses first character of the string argument
- */
+
 Lisp editorPrintC(Lisp args, LispError *e, LispContext ctx) {
-  char c = lisp_string(lisp_car(args))[0];
-  editorInsertChar(c);
+  char *c = lisp_string(lisp_car(args));
+  utf_8_char_t ch = make_utf8_char(c, 1);
+  editorInsertChar(&ch);
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to load and execute a package
- * @details Loads a Lisp package from the user's packages directory
- * (~/.beluga/packages/<package_name>/init.lisp) and evaluates it.
- * @param args Lisp list with one argument: package name (string)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Package files must be valid Lisp code
- * @note Package directory defaults to ~/.beluga/packages/
- */
 Lisp addPackage(Lisp args, LispError *e, LispContext ctx) {
   const char *package_name = lisp_string(lisp_car(args));
-  fprintf(stderr, "%s\n", package_name);
-  char *package_dir = (char *)calloc(256, sizeof(char));
+  char *package_dir = (char *) calloc(256, sizeof(char));
   FILE *fd_package = NULL;
   strcat(package_dir, getenv("HOME"));
   strcat(package_dir, "/.beluga/packages/");
   strcat(package_dir, package_name);
   strcat(package_dir, "/init.lisp");
-  fprintf(stderr, "%s\n", package_dir);
   fd_package = fopen(package_dir, "r");
   lisp_eval(lisp_read_file(fd_package, &E.ctx_error, E.ctx), &E.ctx_error,
             E.ctx);
   fclose(fd_package);
   free(package_dir);
-
+  
   return lisp_null();
+  
 }
 
-/**
- * @brief Lisp function to delete the current row
- * @details Removes the line at the current cursor position.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E
- * @see editorDelRow()
- */
 Lisp editorDelRow_L(Lisp args, LispError *e, LispContext ctx) {
   editorDelRow(E.cursor_y);
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to search for text
- * @details Wrapper around editorFind() for use in Lisp keybindings.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @see editorFind()
- */
 Lisp editorFind_L(Lisp args, LispError *e, LispContext ctx) {
-  fprintf(stderr, "LispFind\n");
-  editorFind();
-  return lisp_null();
+	editorFind();
+	return lisp_null();
 }
 
-/**
- * @brief Lisp function to read character at cursor
- * @details Returns the character at the current cursor position as a Lisp character.
- * Returns 'a' if at end of line.
- * @param args Lisp arguments (unused)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return Lisp character object representing the character at cursor
- */
 Lisp editorReadChar_L(Lisp args, LispError *e, LispContext ctx) {
-  Lisp returned_char;
-  if (E.row[E.cursor_y].render[E.cursor_x] == 0) {
-    returned_char = lisp_make_char('a');
-  } else {
-    
-     returned_char = lisp_make_char(E.row[E.cursor_y].render[E.cursor_x]); 
-  }
-  return returned_char;
-}
-
-/**
- * @brief Lisp function to set the current prefix mode
- * @details Changes the editor's prefix state to a named prefix, affecting which
- * keybindings are active. Updates status message to show active prefix.
- * @param args Lisp list with one argument: prefix name (string)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E (prefix_state)
- * @see find_prefix()
- */
-Lisp editorSetPrefix(Lisp args, LispError *e, LispContext ctx) {
-  /*
-   * Set the prefix state of editor to the prefix in argument
-   */
-  const char *prefix_name = lisp_string(lisp_car(args));
-  struct prefix_t prefix = find_prefix(prefix_name);
-  E.prefix_state = prefix.prefix_id;
-  editorSetStatusMessage("prefix %s", prefix.prefix_name);
-  fprintf(stderr, "%s set\n", prefix_name);
-
+  // fprintf(stderr, "char read : %c\n", E.row[E.cursor_y].render[E.cursor_x]);
+  //  return lisp_make_char(E.row[E.cursor_y].render[E.cursor_x]);
   return lisp_null();
 }
 
-/**
- * @brief Lisp function to define a new prefix modifier
- * @details Registers a named prefix modifier that can be used with keybindings
- * to create context-aware command sequences (e.g., Ctrl-X as a prefix).
- * @param args Lisp list with one argument: prefix name (string, max 64 chars)
- * @param e Error pointer for Lisp error handling
- * @param ctx Lisp context
- * @return lisp_null()
- * @note Updates global editor state E (prefix array)
- */
-Lisp editorPrefix(Lisp args, LispError *e, LispContext ctx) {
-  E.prefix = (struct prefix_t *)realloc(E.prefix, (++(E.number_of_prefix) + 1) *
-                                                      sizeof(struct prefix_t));
-  E.prefix[E.number_of_prefix].prefix_id = E.number_of_prefix;
-  strncpy(E.prefix[E.number_of_prefix].prefix_name, lisp_string(lisp_car(args)),
-          64);
-  return lisp_null();
-}

src/editor_op.c

@@ -1,52 +1,94 @@
 #include "../include/editor_op.h"
 #include "../include/row_op.h"
+#include "include/data.h"
+#include <stdio.h>
 
 
 extern struct editorConfig E;
 
-void editorInsertChar(int c) {
-    if (E.cursor_y == E.numrows) {
-      editorInsertRow(E.numrows, "", 0);
-    }
-    editorRowInsertChar(&E.row[E.cursor_y], E.cursor_x, c);
-    E.cursor_x++;
+void editorInsertChar(utf_8_char_t *c) {
+  if (E.state == READ_ONLY) return;
+  fprintf(stderr, "Insert char %s %d\n", c->c, c->len);
+  // If cursor is past end of file, add empty rows
+  if (E.cursor_y == E.numrows) {
+    editorInsertRow(E.numrows, "", 0);
+  }
+  
+  // Insert character at cursor position
+  editorRowInsertChar(&E.row[E.cursor_y], E.cursor_x, *c);
+  E.cursor_x++;
 }
 
-void editorInsertNewLine() {
-  /*
-   * Add new line and place the cursor at the beginning of it
-   */
-  fprintf(stderr, "Inserting new line\n");
-  erow *row;
-  if (!E.cursor_x) {
+void editorInsertNewline(void) {
+  if (E.state == READ_ONLY) return;
+  
+  if (E.cursor_x == 0) {
+    // Insert blank line before current line
     editorInsertRow(E.cursor_y, "", 0);
   } else {
-    row = &E.row[E.cursor_y];
-    editorInsertRow(E.cursor_y + 1, &row->chars[E.cursor_x],
-                    row->size - E.cursor_x);
-    row = &E.row[E.cursor_y];
+    // Split current line at cursor
+    erow *row = &E.row[E.cursor_y];
+    
+    // Calculate byte length of remaining part
+    int remaining_chars = row->size - E.cursor_x;
+    
+    // Allocate buffer for remaining characters
+    char *buf = malloc(remaining_chars * 4); // Max 4 bytes per UTF-8 char
+    int buf_len = 0;
+    
+    // Convert utf_8_char_t to bytes
+    for (int i = E.cursor_x; i < row->size; i++) {
+      for (int j = 0; j < row->chars[i].len; j++) {
+        buf[buf_len++] = row->chars[i].c[j];
+      }
+    }
+    
+    // Insert new row with remaining text
+    editorInsertRow(E.cursor_y + 1, buf, buf_len);
+    free(buf);
+    
+    // Truncate current row at cursor
+    row = &E.row[E.cursor_y]; // Refresh pointer after realloc
     row->size = E.cursor_x;
-    row->chars[row->size] = '\0';
     editorUpdateRow(row);
   }
-  ++E.cursor_y;
+  
+  E.cursor_y++;
   E.cursor_x = 0;
-  fprintf(stderr, "Insert new line done\n");
 }
 
-void editorDelChar() {
-  erow *row;
-  if (E.cursor_y == E.numrows || !(E.cursor_x || E.cursor_y)) {
-    return;
-  }
-  row = &E.row[E.cursor_y];
+void editorRowAppendRow(erow *dest, erow *src) {
+  // Allocate space for combined rows
+  utf_8_char_t *new_chars = realloc(dest->chars, 
+                                     sizeof(utf_8_char_t) * (dest->size + src->size));
+  if (!new_chars) return;
+  
+  dest->chars = new_chars;
+  
+  // Copy source row characters
+  memcpy(&dest->chars[dest->size], src->chars, sizeof(utf_8_char_t) * src->size);
+  dest->size += src->size;
+  
+  editorUpdateRow(dest);
+  ++E.dirty;
+}
+
+void editorDelChar(void) {
+  if (E.state == READ_ONLY) return;
+  if (E.cursor_y == E.numrows) return;
+  if (E.cursor_x == 0 && E.cursor_y == 0) return;
+  
+  erow *row = &E.row[E.cursor_y];
+  
   if (E.cursor_x > 0) {
+    // Delete character before cursor
     editorRowDelchar(row, E.cursor_x - 1);
-    --E.cursor_x;
+    E.cursor_x--;
   } else {
+    // At beginning of line - join with previous line
     E.cursor_x = E.row[E.cursor_y - 1].size;
-    editorRowAppendString(&E.row[E.cursor_y - 1], row->chars, row->size);
+    editorRowAppendRow(&E.row[E.cursor_y - 1], row);
     editorDelRow(E.cursor_y);
-    --E.cursor_y;
+    E.cursor_y--;
   }
 }

src/file_io.c

@@ -1,11 +1,3 @@
-/**
- * @file file_io.c
- * @brief File I/O operations module for the Beluga text editor
- * @details Handles file loading, saving, searching, and buffer management.
- * Provides functionality for opening/closing files, persisting changes to disk,
- * and searching for text patterns within the document.
- */
-
 #include "../include/file_io.h"
 #include "../include/input.h"
 #include "../include/output.h"
@@ -15,6 +7,7 @@
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <errno.h>
 
 extern char *strdup(const char *);
 extern ssize_t getline(char **restrict lineptr, size_t *restrict n,
@@ -22,53 +15,51 @@ extern ssize_t getline(char **restrict lineptr, size_t *restrict n,
 extern int ftruncate(int fd, off_t length);
 extern struct editorConfig E;
 
-/**
- * @brief Converts all editor rows to a single string buffer
- * @details Concatenates all row content into a single allocated buffer with
- * newlines between rows. Useful for file saving and buffer operations.
- * @param buffer_len Pointer to integer where total buffer length will be stored
- * @return Pointer to dynamically allocated buffer containing all row data.
- *         Rows are separated by newline characters.
- * @note Caller is responsible for freeing the returned buffer
- */
+// Convert utf_8_char_t array to byte string
 char *editorRowsToString(int *buffer_len) {
     int tot_len = 0;
-    int j;
+    int j, i;
     char *buf;
     char *p;
 
+    // Calculate total byte length (not character count)
     for (j = 0; j < E.numrows; ++j) {
-        tot_len += E.row[j].size + 1;
+        // Count actual bytes in each character
+        for (i = 0; i < E.row[j].size; i++) {
+            tot_len += E.row[j].chars[i].len;
+        }
+        tot_len++; // For newline
     }
+    
     *buffer_len = tot_len;
     buf = malloc(tot_len);
+    if (!buf) return NULL;
+    
     p = buf;
     for (j = 0; j < E.numrows; ++j) {
-        memcpy(p, E.row[j].chars, E.row[j].size);
-        p += E.row[j].size;
-        *p = '\n';
-        p++;
+        // Copy each character's bytes
+        for (i = 0; i < E.row[j].size; i++) {
+            for (int k = 0; k < E.row[j].chars[i].len; k++) {
+                *p++ = E.row[j].chars[i].c[k];
+            }
+        }
+        *p++ = '\n';
     }
 
     return buf;
 }
 
-/**
- * @brief Closes the current file and resets editor state
- * @details Clears all rows, resets cursor position, scroll offsets, and file metadata.
- * Does not prompt to save unsaved changes.
- * @note Updates global editor state E
- */
 void editorCloseFile(void) {
+    // Free all rows
+    for (int i = 0; i < E.numrows; i++) {
+        editorFreeRow(&E.row[i]);
+    }
+    
     E.cursor_x = 0;
     E.cursor_y = 0;
     E.rx = 0;
     E.row_offset = 0;
     E.col_offset = 0;
-    for (int i = 0; i < E.numrows; ++i) {
-      free(E.row[i].chars);
-      free(E.row[i].render);
-    }
     E.numrows = 0;
     free(E.row);
     E.row = NULL;
@@ -79,64 +70,47 @@ void editorCloseFile(void) {
     E.status_msg_time = 0;
 }
 
-/**
- * @brief Opens a file for editing
- * @details Loads file content into editor rows, one line per row. If another file
- * is already open, it is closed first (without saving). File is opened in a+
- * (read/append) mode to allow both reading and modification.
- * @param filename Path to the file to open (relative or absolute)
- * @note Updates global editor state E
- * @note Calls die() on file open failure
- * @note Newline characters are stripped from loaded lines
- * @see editorInsertRow()
- */
 void editorOpen(char *filename) {
     FILE *fp;
 
     // Test if a file is already open
     if (E.filename != NULL) {
         editorCloseFile();
-        E.state = READ_AND_WRITE;
     }
+    E.state = READ_AND_WRITE;
 
     E.filename = strdup(filename);
 
-    fp = fopen(filename, "a+");
-    if (!fp)
-        die("fopen");
+    fp = fopen(filename, "r");
+    if (!fp) {
+        // File doesn't exist - that's okay, we'll create it on save
+        E.dirty = 0;
+        return;
+    }
 
     char *line = NULL;
     size_t line_cap = 0;
     ssize_t line_len;
 
     while ((line_len = getline(&line, &line_cap, fp)) != -1) {
+        // Strip newline characters
         while (line_len > 0 &&
                (line[line_len - 1] == '\n' || line[line_len - 1] == '\r')) {
             --line_len;
         }
+        // editorInsertRow will convert bytes to utf_8_char_t
         editorInsertRow(E.numrows, line, line_len);
-        free(line);
-        line = NULL;
     }
     free(line);
     fclose(fp);
     E.dirty = 0;
 }
 
-/**
- * @brief Saves the current file to disk
- * @details Prompts for filename if not set, converts all rows to a buffer,
- * writes to disk using open/ftruncate/write, and updates dirty flag.
- * Displays status messages on success or failure.
- * @note Updates global editor state E (dirty flag)
- * @note If no filename is set, prompts user via editorPrompt()
- * @note Uses O_RDWR | O_CREAT with mode 0644
- * @see editorRowsToString()
- */
 void editorSave() {
     int len;
     char *buf;
     int fd;
+    
     if (E.filename == NULL) {
         E.filename = editorPrompt("Save as: %s (ESC to cancel)", "", 1);
         if (E.filename == NULL) {
@@ -144,48 +118,100 @@ void editorSave() {
             return;
         }
     }
+    
     buf = editorRowsToString(&len);
-    fd = open(E.filename, O_RDWR | O_CREAT, 0644);
+    if (!buf) {
+        editorSetStatusMessage("Can't save! Memory error");
+        return;
+    }
+    
+    fd = open(E.filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
     if (fd != -1) {
-        if (ftruncate(fd, len) != -1) {
-            if (write(fd, buf, len) == len) {
-                close(fd);
-                free(buf);
-                E.dirty = 0;
-                editorSetStatusMessage("%d bytes written to disk", len);
-                return;
-            }
+        if (write(fd, buf, len) == len) {
+            close(fd);
+            free(buf);
+            E.dirty = 0;
+            editorSetStatusMessage("%d bytes written to disk", len);
+            return;
         }
         close(fd);
     }
+    
     free(buf);
     editorSetStatusMessage("Can't save! I/O error: %s", strerror(errno));
 }
 
-/**
- * @brief Searches for a string in the document
- * @details Prompts user for a search query, then searches forward from current
- * cursor position. Updates cursor position to the first match found.
- * @note Updates global editor state E (cursor position, row_offset)
- * @note Search is case-sensitive and operates on rendered line content
- * @note Searches begin from the line after current cursor position
- * @see editorPrompt()
- * @see editorRowRxToCx()
- */
-void editorFind() {
-  fprintf(stderr, "searching\n");
-  char *query = editorPrompt("Search: %s (ESC to cancel)", "", 0);
-  if (query == NULL) return;
-  int i;
-  for (i = E.cursor_y + 1; i < E.numrows; i++) {
-    erow *row = &E.row[i];
-    char *match = strstr(row->render, query);
-    if (match) {
-      E.cursor_y = i;
-      E.cursor_x = editorRowRxToCx(row, match - row->render);
-      E.row_offset = E.numrows;
-      break;
+// Helper to convert utf_8_char_t array to byte string for searching
+static char *row_to_string(erow *row) {
+    // Calculate byte length
+    int byte_len = 0;
+    for (int i = 0; i < row->rsize; i++) {
+        byte_len += row->render[i].len;
     }
-  }
-  free(query);
+    
+    char *str = malloc(byte_len + 1);
+    if (!str) return NULL;
+    
+    // Convert to bytes
+    int pos = 0;
+    for (int i = 0; i < row->rsize; i++) {
+        for (int j = 0; j < row->render[i].len; j++) {
+            str[pos++] = row->render[i].c[j];
+        }
+    }
+    str[pos] = '\0';
+    
+    return str;
+}
+
+void editorFind() {
+    char *query = editorPrompt("Search: %s (ESC to cancel)", "", 0);
+    if (query == NULL) return;
+    
+    int saved_cursor_x = E.cursor_x;
+    int saved_cursor_y = E.cursor_y;
+    int saved_row_offset = E.row_offset;
+    int saved_col_offset = E.col_offset;
+    
+    // Search from current position forward
+    for (int i = E.cursor_y; i < E.numrows; i++) {
+        erow *row = &E.row[i];
+        
+        // Convert row to byte string for searching
+        char *render_str = row_to_string(row);
+        if (!render_str) continue;
+        
+        char *match = strstr(render_str, query);
+        if (match) {
+            E.cursor_y = i;
+            
+            // Find the character index from byte position
+            int byte_pos = match - render_str;
+            int char_idx = 0;
+            int current_byte = 0;
+            
+            for (char_idx = 0; char_idx < row->rsize; char_idx++) {
+                if (current_byte >= byte_pos) break;
+                current_byte += row->render[char_idx].len;
+            }
+            
+            E.cursor_x = editorRowRxToCx(row, char_idx);
+            E.row_offset = E.numrows; // Force scroll
+            
+            free(render_str);
+            free(query);
+            return;
+        }
+        
+        free(render_str);
+    }
+    
+    // Not found - restore cursor position
+    E.cursor_x = saved_cursor_x;
+    E.cursor_y = saved_cursor_y;
+    E.row_offset = saved_row_offset;
+    E.col_offset = saved_col_offset;
+    
+    editorSetStatusMessage("Not found: %s", query);
+    free(query);
 }

src/init.c

@@ -1,46 +1,44 @@
 #include "../include/init.h"
-#include "../include/builtins.h"
 #include "../include/data.h"
 #include "../include/terminal.h"
+#include "../include/builtins.h"
 #include <stdio.h>
-#include <stdlib.h>
 
 #define LISP_IMPLEMENTATION
 #include "../include/lisp.h"
 #include "../include/lisp_lib.h"
 
-struct editorConfig;
+extern struct editorConfig;
+
 
 void registerBuiltin(char *key_sequence, LispCFunc f) {
   lisp_env_define(E.ctx.p->env, lisp_make_symbol(key_sequence, E.ctx),
                   lisp_make_func(f), E.ctx);
+  
 }
 
 void initBuiltins() {
   // move cursor
-  registerBuiltin("move-cursor", moveCursor);
-  registerBuiltin("map-key", mapKey);
-  registerBuiltin("editor-quit", editorQuit);
-  registerBuiltin("editor-save", l_editorSave);
-  registerBuiltin("editor-insert-new-line", l_editorInsertNewLine);
-  registerBuiltin("move-cursor-beg-line", moveCursorBeginLine);
-  registerBuiltin("move-cursor-end-line", moveCursorEndLine);
-  registerBuiltin("editor-delete-previous-char", deletePreviousChar);
-  registerBuiltin("move-cursor-page-up", editorMoveCursorPageUp);
-  registerBuiltin("move-cursor-page-down", editorMoveCursorPageDown);
-  registerBuiltin("editor-open-file", editorOpenFile);
-  registerBuiltin("editor-insert-char", editorPrintC);
-  registerBuiltin("add-package", addPackage);
-  registerBuiltin("editor-del-row", editorDelRow_L);
-  registerBuiltin("editor-find", editorFind_L);
-  registerBuiltin("editor-read-char", editorReadChar_L);
-  registerBuiltin("add-prefix", editorPrefix);
-  registerBuiltin("editor-set-prefix", editorSetPrefix);
-  registerBuiltin("editor-insert-tab", l_editorInserTab);
+  registerBuiltin("MOVE-CURSOR", moveCursor);
+  registerBuiltin("MAP-KEY", mapKey);
+  registerBuiltin("EDITOR-QUIT", editorQuit);
+  registerBuiltin("EDITOR-SAVE", l_editorSave);
+  registerBuiltin("EDITOR-INSERT-NEW-LINE", l_editorInsertNewLine);
+  registerBuiltin("MOVE-CURSOR-BEG-LINE", moveCursorBeginLine);
+  registerBuiltin("MOVE-CURSOR-END-LINE", moveCursorEndLine);
+  registerBuiltin("EDITOR-DELETE-PREVIOUS-CHAR", deletePreviousChar);
+  registerBuiltin("MOVE-CURSOR-PAGE-UP", editorMoveCursorPageUp);
+  registerBuiltin("MOVE-CURSOR-PAGE-DOWN", editorMoveCursorPageDown);
+  registerBuiltin("EDITOR-OPEN-FILE", editorOpenFile);
+  registerBuiltin("EDITOR-INSERT-CHAR", editorPrintC);
+  registerBuiltin("ADD-PACKAGE", addPackage);
+  registerBuiltin("EDITOR-DEL-ROW", editorDelRow_L);
+	registerBuiltin("EDITOR-FIND", editorFind_L);
+	registerBuiltin("EDITOR-READ-CHAR", editorReadChar_L);
 }
 
 void initEditor() {
-  E.init_file_path = (char *)calloc(256, sizeof(char));
+  char * init_file_path = (char *) calloc(256, sizeof(char));
   E.cursor_x = 0;
   E.cursor_y = 0;
   E.rx = 0;
@@ -59,18 +57,11 @@ void initEditor() {
   E.screenrows -= 2;
 
   E.number_of_keybinds = 0;
-  E.number_of_prefix = 0;
-  // General prefix is 0 (no prefix)
-  E.prefix = (struct prefix_t *)malloc(sizeof(struct prefix_t));
-  E.prefix[0].prefix_id = 0;
-  strncpy(E.prefix[0].prefix_name, "no-prefix", 64);
-  
-  E.prefix_state = 0;
 
-  strcat(E.init_file_path, getenv("HOME"));
-  strcat(E.init_file_path, "/.beluga/config/init.lisp");
-  // printf("%s\n", init_file_path);
-  E.fd_init_file = fopen(E.init_file_path, "r");
+  strcat(init_file_path, getenv("HOME"));
+  strcat(init_file_path, "/.beluga/config/init.lisp");
+  printf("%s\n", init_file_path);
+  E.fd_init_file = fopen(init_file_path, "r");
   E.ctx = lisp_init();
   E.env = lisp_env(E.ctx);
   lisp_lib_load(E.ctx);
@@ -79,11 +70,12 @@ void initEditor() {
 
   // Read config file
   E.ctx_data = lisp_read_file(E.fd_init_file, &E.ctx_error, E.ctx);
+  free(init_file_path);
   if (E.ctx_error != LISP_ERROR_NONE) {
     die("init failed");
   }
   lisp_eval(E.ctx_data, &E.ctx_error, E.ctx);
-
+  
   // To modify
 
   E.constantes.TAB_LENGTH =
@@ -94,6 +86,6 @@ void initEditor() {
       (int)lisp_eval(lisp_read("QUIT-TIMES", &E.ctx_error, E.ctx), &E.ctx_error,
                      E.ctx)
           .val.int_val;
-
+  fprintf(stderr, "Tab %d\n", E.constantes.QUIT_TIMES);
   E.quit_times_buffer = E.constantes.QUIT_TIMES;
 }

src/input.c

@@ -2,6 +2,7 @@
 #include "../include/define.h"
 #include "../include/editor_op.h"
 #include "../include/output.h"
+#include "include/data.h"
 #include <ctype.h>
 #include <dirent.h>
 #include <stdint.h>
@@ -9,52 +10,30 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 extern struct editorConfig E;
 
-/**
- * @file input.c
- * @brief Input handling module for the Beluga text editor
- * @details Manages user input processing, key bindings, cursor movement, and file path completion
- */
-
-/**
- * @brief Returns the first file completion match for the given path
- * @details Searches the directory containing the given path prefix and returns
- * the first file or directory entry that matches the filename prefix.
- * Appends a trailing slash for directory entries.
- * @param path The file path to complete (can be relative or absolute)
- * @return Pointer to the completed file path (dynamically allocated), or NULL if:
- *         - path ends with '/' (already a directory)
- *         - no matching entries found
- *         - directory cannot be opened
- * @note Caller is responsible for freeing the returned string
- * @note Uses static buffer internally; may return stale pointers across calls
- */
-const char *file_completion(const char *path) {
+char *file_completion(const char *path) {
   DIR *dir;
   struct dirent *entry;
   char directory[128];
   char predict[128];
-  const char *last_slash;
   int predict_len = 0;
-  size_t dir_len;
 
-  // path is a directory
   if (path[strlen(path) - 1] == '/') {
-    return path;
+    return strdup(path);
   }
 
   // Find dir name
-  last_slash = strrchr(path, '/');
+  char *last_slash = strrchr(path, '/');
   if (last_slash) {
-    dir_len = last_slash - path + 1; // length of dir_path
+    size_t dir_len = last_slash - path + 1;
     strncpy(directory, path, dir_len);
     predict_len = strlen(path) - dir_len;
     strncpy(predict, last_slash + 1, predict_len);
     directory[dir_len] = '\0';
     predict[predict_len] = '\0';
-    fprintf(stderr, "%s %s\n", directory, predict);
   } else {
     return NULL;
   }
@@ -65,45 +44,30 @@ const char *file_completion(const char *path) {
 
   while ((entry = readdir(dir)) != NULL) {
     if (strncmp(entry->d_name, predict, predict_len) == 0) {
-      static char full_path[512];
+      static char full_path[128];
       snprintf(full_path, sizeof(full_path), "%s%s", directory, entry->d_name);
 
       struct stat st;
       if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode)) {
-        strcat(full_path, "/"); // add slash for directories
+        strcat(full_path, "/");
       }
       closedir(dir);
-      
       return strdup(full_path);
     }
   }
 
-  // Cleanup when no more entries
   closedir(dir);
-  dir = NULL;
-  free(entry);
   return NULL;
 }
 
 /**
- * @brief Displays an interactive prompt and returns user input
- * @details Allows the user to enter text in a prompt with optional path completion
- * via Tab key. Supports backspace, delete, and escape key handling. Dynamically
- * allocates memory for the input buffer.
- * @param prompt The prompt message format string (printf-style)
- * @param placeHolder Initial text to display in the input buffer
- * @param bPathMode If non-zero, enables Tab key file path completion
- * @return Pointer to the user-entered text (dynamically allocated), or NULL if:
- *         - User pressed ESC to cancel
- *         - Input buffer is empty when Enter is pressed
- * @note Caller is responsible for freeing the returned string
- * @note Uses editorReadKey() for input and editorRefreshScreen() for display
- */
+ * \fn char * editorPrompt(struct editorConfig *E, char *prompt, char bPathMode)
+ * \brief Return user input in a prompt when enter is hit. */
+
 char *editorPrompt(char *prompt, char *placeHolder, char bPathMode) {
   size_t buf_size = 128;
   char *buf = malloc(buf_size);
   size_t buf_len = 0;
-  int c = 0;
   buf[0] = '\0';
   strcpy(buf, placeHolder);
   buf_len = strlen(placeHolder);
@@ -111,142 +75,73 @@ char *editorPrompt(char *prompt, char *placeHolder, char bPathMode) {
   while (1) {
     editorSetStatusMessage(prompt, buf);
     editorRefreshScreen();
-    c = editorReadKey();
-    if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
+    
+    KeyInfo *key = editorReadKey();
+    
+    // Handle backspace/delete
+    if (key->type == KEY_SPECIAL && (key->data.special == 127 || key->data.special == 8)) {
       if (buf_len != 0) {
         buf[--buf_len] = '\0';
       }
-    } else if (c == ESCAPE) {
+    }
+    // Handle Ctrl+H (backspace)
+    else if (key->type == KEY_CTRL && key->data.ctrl_char == 'H') {
+      if (buf_len != 0) {
+        buf[--buf_len] = '\0';
+      }
+    }
+    // Handle ESC
+    else if (key->type == KEY_SPECIAL && key->data.special == 27) {
       editorSetStatusMessage("");
       free(buf);
       return NULL;
-    } else if (c == '\r') {
+    }
+    // Handle Enter
+    else if (key->type == KEY_SPECIAL && (key->data.special == 13 || key->data.special == 10)) {
       if (buf_len != 0) {
         editorSetStatusMessage("");
         return buf;
       }
-    } else if (bPathMode && c == '\t') {
+    }
+    // Handle Tab for path completion
+    else if (bPathMode && key->type == KEY_SPECIAL && key->data.special == 9) {
       char path[128];
       char *pwd;
       if (buf[0] != '/') {
         pwd = getenv("PWD");
-        fprintf(stderr, "%s\n", pwd);
-        memcpy(path, pwd, strlen(pwd));
-        path[strlen(pwd)] = '/';
-        strncat(path, buf, buf_len);
+        snprintf(path, sizeof(path), "%s/%s", pwd, buf);
       } else {
         strcpy(path, buf);
       }
-      memset(buf, 0, 128);
-      buf_len = 0;
-      char * buf_complete = (char *) file_completion(path);
-      strcpy(buf, buf_complete);
-      free(buf_complete);
-      buf_len = strlen(buf);
-      buf[buf_len] = '\0';
-
-    } else if (!iscntrl(c) && c < 128) {
+      
+      char *completion = file_completion(path);
+      if (completion) {
+        memset(buf, 0, buf_size);
+        strcpy(buf, completion);
+        buf_len = strlen(buf);
+        free(completion);
+      }
+    }
+    // Handle regular characters (ASCII only for prompts)
+    else if (key->type == KEY_CHAR && key->data.codepoint < 128) {
       if (buf_len == buf_size - 1) {
         buf_size *= 2;
         buf = realloc(buf, buf_size);
       }
-      buf[buf_len++] = c;
+      buf[buf_len++] = (char)key->data.codepoint;
       buf[buf_len] = '\0';
     }
   }
 }
 
-/**
- * @brief Converts a key code to its string representation
- * @details Translates raw key codes (including special keys, control keys,
- * and regular characters) into human-readable string formats suitable for
- * display and keybinding configuration.
- * @param key The key code to convert
- * @return Pointer to static buffer containing the string representation.
- *         Examples: "ENTER", "ARROW-UP", "CTRL-a", "TAB", "DELETE", etc.
- * @note Returns pointer to static buffer; string is overwritten on next call
- * @note Non-printable characters are formatted as "KEY-<number>"
- */
-char *key_to_string(int key) {
-  static char key_str[32];
-
-  char tmp[10];
-  sprintf(tmp, "%d", key);
-
-  // First test enter key
-
-  if (key == '\r') {
-    strcpy(key_str, "ENTER");
-  } else if (key == '\t') {
-    strcpy(key_str, "TAB");
-  } else if (key >= 1 && key <= 26) { // CTRL keys
-    snprintf(key_str, sizeof(key_str), "CTRL-%c", 'a' + key - 1);
-  } else {
-    switch (key) {
-    case ARROW_UP:
-      strcpy(key_str, "ARROW-UP");
-      break;
-    case ARROW_DOWN:
-      strcpy(key_str, "ARROW-DOWN");
-      break;
-    case ARROW_LEFT:
-      strcpy(key_str, "ARROW-LEFT");
-      break;
-    case ARROW_RIGHT:
-      strcpy(key_str, "ARROW-RIGHT");
-      break;
-    case PAGE_UP:
-      strcpy(key_str, "PAGE-UP");
-      fprintf(stderr, "pagr up\n");
-      break;
-    case PAGE_DOWN:
-      strcpy(key_str, "PAGE-DOWN");
-      break;
-    case DEL_KEY:
-      strcpy(key_str, "DEL");
-
-      break;
-    case BACKSPACE:
-      strcpy(key_str, "BACKSPACE");
-      break;
-    case '\r':
-      strcpy(key_str, "ENTER");
-      break;
-    case '\x1b':
-      strcpy(key_str, "ESCAPE");
-      break;
-    case BEG_LINE:
-      strcpy(key_str, "HOME");
-      break;
-    case END_LINE:
-      strcpy(key_str, "END");
-      break;
-    default:
-      // For regular characters
-      if (isprint(key)) {
-        snprintf(key_str, sizeof(key_str), "%c", key);
-      } else {
-        snprintf(key_str, sizeof(key_str), "KEY-%d", key);
-      }
-    }
-  }
-  return key_str;
-}
-
-/**
- * @brief Moves the cursor based on arrow key input
- * @details Updates cursor position (E.cursor_x, E.cursor_y) based on the given
- * key direction. Handles line wrapping and boundary conditions. Prevents cursor
- * from exceeding line lengths.
- * @param key The arrow key code (ARROW_UP, ARROW_DOWN, ARROW_LEFT, ARROW_RIGHT)
- * @return 1 if cursor movement was valid, 0 if cursor was constrained to line boundary
- * @note Updates global editor state E
- */
-int editorMoveCursor(int key) {
+void editorMoveCursor(KeyInfo *key) {
+  if (key->type != KEY_ARROW) return;
+  
   erow *row = (E.cursor_y >= E.numrows) ? NULL : &E.row[E.cursor_y];
   int row_len;
-  switch (key) {
-  case ARROW_RIGHT:
+  
+  switch (key->data.arrow) {
+  case 'C': // Right
     if (row && E.cursor_x < row->size) {
       ++E.cursor_x;
     } else if (row && E.cursor_x == row->size) {
@@ -254,17 +149,17 @@ int editorMoveCursor(int key) {
       E.cursor_x = 0;
     }
     break;
-  case ARROW_DOWN:
+  case 'B': // Down
     if (E.cursor_y < E.numrows) {
       ++E.cursor_y;
     }
     break;
-  case ARROW_UP:
+  case 'A': // Up
     if (E.cursor_y != 0) {
       --E.cursor_y;
     }
     break;
-  case ARROW_LEFT:
+  case 'D': // Left
     if (E.cursor_x != 0) {
       --E.cursor_x;
     } else if (E.cursor_y > 0) {
@@ -278,55 +173,76 @@ int editorMoveCursor(int key) {
   row_len = row ? row->size : 0;
   if (E.cursor_x > row_len) {
     E.cursor_x = row_len;
-    return 0;
   }
-  return 1;
 }
 
-/**
- * @brief Executes the command bound to a key sequence
- * @details Searches the keybinding table for a matching key sequence and
- * prefix state, then evaluates the associated Lisp command.
- * @param key_sequence The string representation of the key sequence
- * @return 1 if a matching keybinding was found and executed, 0 otherwise
- * @note Updates global editor state E (prefix_state)
- * @note Uses Lisp interpreter to evaluate bound commands
- */
-int executeKeyBind(char *key_sequence) {
-  int i;
-  int previous_state = 0;
-  fprintf(stderr, "pressed %s\n", key_sequence);
-  for (i = 0; i < E.number_of_keybinds; ++i) {
-    if (!strcmp(key_sequence, E.key_binds[i].key_sequence)) {
-      if (E.prefix_state != E.key_binds[i].prefix_id) {
-        continue;
-      }
-      previous_state = E.prefix_state;
-      // It's a symbol, create a function call
+KeyInfo *stringToCodepoint(const char *string) {
+  KeyInfo *key = (KeyInfo *)malloc(sizeof(KeyInfo));
+  // test control key
+  if (!strncmp("CTRL", string, 4)) {
+    key->type = KEY_CTRL;
+    key->data.ctrl_char = toupper(string[6]) + 64;
+  } else if (!strncmp("ARROW", string, 5)) {
+    key->type = KEY_ARROW;
+    if (!strcmp("UP", string + 7)) {
+      key->data.arrow = 'A';
+    } else if (!strcmp("DOWN", string + 7)) {
+      key->data.arrow = 'B';
+    } else if (!strcmp("RIGHT", string + 7)) {
+      key->data.arrow = 'C';
+    } else if (!strcmp("LEFT", string + 7)) {
+      key->data.arrow = 'D';
+    }
+  }
+
+  return key;
+}
+
+static int key_match(KeyInfo *a, KeyInfo *b) {
+  if (a->type != b->type) return 0;
+  if (a->modifiers != b->modifiers) return 0;
+  
+  switch (a->type) {
+    case KEY_CTRL:
+      return toupper(a->data.ctrl_char) == toupper(b->data.ctrl_char);
+    case KEY_ALT:
+      return a->data.alt_char == b->data.alt_char;
+    case KEY_ARROW:
+      return a->data.arrow == b->data.arrow;
+    case KEY_FUNCTION:
+      return a->data.function_num == b->data.function_num;
+    case KEY_CHAR:
+      return a->data.codepoint == b->data.codepoint;
+    case KEY_SPECIAL:
+    case KEY_NAVIGATION:
+      return a->data.special == b->data.special;
+    default:
+      return 0;
+  }
+}
+
+int executeKeyBind(KeyInfo *key_sequence) {
+  for (int i = 0; i < E.number_of_keybinds; ++i) {
+    fprintf(stderr, "Keybind found\n");
+    if (key_match(key_sequence, E.key_binds[i].key_sequence)) {
+      // Execute the lisp command
       lisp_eval(lisp_cons(E.key_binds[i].command, lisp_null(), E.ctx),
                 &E.ctx_error, E.ctx);
-      if (E.prefix_state == previous_state)
-        E.prefix_state = 0;
       return 1;
     }
   }
   return 0;
 }
 
-/**
- * @brief Processes a single keypress from the user
- * @details Reads a key, checks if it matches any registered keybinding,
- * and either executes the bound command or inserts the character. Resets
- * the quit buffer counter on successful key processing.
- * @note Updates global editor state E
- * @note Calls editorReadKey() to get input and editorInsertChar() for unbound keys
- */
 void editorProcessKeypress() {
-  int c = editorReadKey();
+  KeyInfo *key = editorReadKey();
+  if (!key)
+    return;
 
-  if (executeKeyBind(key_to_string(c))) {
+  if (executeKeyBind(key)) {
+    fprintf(stderr, "Keybinds found\n");
     return;
   }
-  editorInsertChar(c);
+  editorInsertChar(&key->c);
   E.quit_times_buffer = E.constantes.QUIT_TIMES;
 }

src/output.c

@@ -1,30 +1,22 @@
-/**
- * @file output.c
- * @brief Screen rendering and output module for the Beluga text editor
- * @details Handles all screen updates, cursor positioning, status bar rendering,
- * and display synchronization using ANSI escape sequences
- */
-
 #include "../include/output.h"
-#include "../include/syntax_highlighter.h"
 #include <stdarg.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
 extern struct editorConfig E;
 
-/**
- * @brief Renders all visible rows to the screen buffer
- * @details Draws file content with syntax highlighting, handles line wrapping,
- * and displays tilde characters (~) for empty lines. Shows welcome message
- * when no file is open.
- * @param ab Pointer to append buffer structure for accumulating output
- * @note Respects E.row_offset and E.col_offset for scrolling
- * @note Clears to end of each line after content
- * @see editorRefreshScreen()
- */
+static void utf8_to_bytes(utf_8_char_t *chars, int count, unsigned char *output, int *output_len) {
+  int pos = 0;
+  for (int i = 0; i < count; i++) {
+    for (int j = 0; j < chars[i].len; j++) {
+      output[pos++] = chars[i].c[j];
+    }
+    fprintf(stderr, "bytes length : %s %d\n", chars[i].c, pos);
+  }
+  *output_len = pos;
+}
+
 void editorDrawRows(struct abuf *ab) {
   int y;
   char welcome[80];
@@ -60,22 +52,22 @@ void editorDrawRows(struct abuf *ab) {
         len = 0;
       if (len > E.screencols)
         len = E.screencols;
-      char * highlighted = highlight_line(&E.row[file_row].render[E.col_offset], &E.row[file_row].rsize);
-      abAppend(ab, highlighted, E.row[file_row].rsize);
-      free(highlighted);
+      if (len > 0) {
+        unsigned char *display_buf = malloc(len * 4); // Max 4 bytes per char
+        int byte_len;
+
+        utf8_to_bytes(&E.row[file_row].render[E.col_offset], len, display_buf,
+                      &byte_len);
+        abAppend(ab, display_buf, byte_len);
+        fprintf(stderr, "display buffer : %s %d\n", display_buf, byte_len);
+        free(display_buf);
+      }
     }
     abAppend(ab, ERASE_END_LINE, 3);
     abAppend(ab, "\r\n", 2);
   }
 }
 
-/**
- * @brief Updates scroll offsets to keep cursor visible on screen
- * @details Adjusts E.row_offset and E.col_offset to ensure the cursor remains
- * within the visible viewport. Also updates E.rx (rendered x-coordinate).
- * @note Updates global editor state E
- * @see editorRowCxToRx()
- */
 void editorScroll() {
   E.rx = E.cursor_x;
   if (E.cursor_y < E.numrows) {
@@ -96,13 +88,6 @@ void editorScroll() {
   }
 }
 
-/**
- * @brief Renders the status bar at the bottom of the screen
- * @details Displays filename, line count, dirty flag, and current cursor position
- * in an inverted color bar. Right-aligns the cursor position indicator.
- * @param ab Pointer to append buffer structure for accumulating output
- * @note Uses ANSI escape codes for color inversion
- */
 void editorDrawStatusBar(struct abuf *ab) {
   int len, render_len;
   char status[80], render_status[80];
@@ -130,13 +115,6 @@ void editorDrawStatusBar(struct abuf *ab) {
   abAppend(ab, "\r\n", 2);
 }
 
-/**
- * @brief Renders the message bar below the status bar
- * @details Displays temporary status messages for a limited time (5 seconds).
- * Only displays message if within time window and within screen width.
- * @param ab Pointer to append buffer structure for accumulating output
- * @note Messages are set by editorSetStatusMessage()
- */
 void editorDrawMessageBar(struct abuf *ab) {
   int msg_len = strlen(E.status_msg);
   abAppend(ab, ERASE_END_LINE, 3);
@@ -148,16 +126,6 @@ void editorDrawMessageBar(struct abuf *ab) {
   }
 }
 
-/**
- * @brief Performs complete screen refresh and buffer synchronization
- * @details Clears screen, redraws all visible content (rows, status bar, message bar),
- * positions cursor, and writes accumulated buffer to stdout. This is the main
- * rendering function called each frame.
- * @note Updates global editor state E (via editorScroll())
- * @see editorDrawRows()
- * @see editorDrawStatusBar()
- * @see editorDrawMessageBar()
- */
 void editorRefreshScreen() {
   editorScroll();
   struct abuf ab = ABUF_INIT;
@@ -175,20 +143,11 @@ void editorRefreshScreen() {
   abAppend(&ab, buf, strlen(buf));
 
   abAppend(&ab, SHOW_CURSOR, 6);
+
   write(STDOUT_FILENO, ab.b, ab.len);
   abFree(&ab);
 }
 
-
-/**
- * @brief Sets a temporary status message for display
- * @details Formats and stores a message that will be displayed in the message bar
- * for 5 seconds. Uses printf-style variable argument formatting.
- * @param fmt Printf-style format string
- * @param ... Variable arguments for format string
- * @note Updates global editor state E (status_msg, status_msg_time)
- * @see editorDrawMessageBar()
- */
 void editorSetStatusMessage(const char *fmt, ...) {
   va_list ap;
   va_start(ap, fmt);

src/row_op.c

@@ -1,4 +1,6 @@
 #include "../include/row_op.h"
+#include "include/data.h"
+#include "include/define.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -6,11 +8,29 @@
 
 extern struct editorConfig E;
 
+static int is_tab(utf_8_char_t *ch) {
+  return ch->len == 1 && ch->c[0] == '\t';
+}
+
+// Helper function to check if two utf_8_char_t are equal
+static int utf8_char_equal(utf_8_char_t *a, utf_8_char_t *b) {
+  if (a->len != b->len) return 0;
+  return memcmp(a->c, b->c, a->len) == 0;
+}
+
+// Helper function to create a space character
+static utf_8_char_t make_space() {
+  utf_8_char_t space;
+  space.c[0] = ' ';
+  space.len = 1;
+  return space;
+}
+
 int editorRowCxToRx(erow *row, int cursor_x) {
   int render_x = 0;
   int i;
   for (i = 0; i < cursor_x; ++i) {
-    if (row->chars[i] == '\t') {
+    if (is_tab(&row->chars[i])) {
       render_x += (E.constantes.TAB_LENGTH - 1) - (render_x % E.constantes.TAB_LENGTH);
     }
     render_x++;
@@ -22,7 +42,7 @@ int editorRowRxToCx(erow *row, int rx) {
   int cur_rx = 0;
   int cx;
   for (cx = 0; cx < row->size; cx++) {
-    if (row->chars[cx] == '\t')
+    if (is_tab(&row->chars[cx]))
       cur_rx += (E.constantes.TAB_LENGTH - 1) - (cur_rx % E.constantes.TAB_LENGTH);
     cur_rx++;
     if (cur_rx > rx) return cx;
@@ -39,40 +59,42 @@ void editorUpdateRow(erow *row) {
   int i, i_render;
   int tabs = 0;
 
-  // counting number of tabs
-
+  // Count number of tabs
   for (i = 0; i < row->size; ++i) {
-    tabs +=
-        (row->chars[i] == '\t'); /**< increment tabs of 1 if chars[i] is one. */
+    if (is_tab(&row->chars[i])) {
+      tabs++;
+    }
   }
 
   free(row->render);
-  row->render = malloc(row->size + tabs * (E.constantes.TAB_LENGTH - 1) +
-                       1); /**< Tabs needs E.constantes.TAB_LENGTH chars so E.constantes.TAB_LENGTH - 1
-                              more than the first already counted. */
+  // Allocate space for utf_8_char_t array
+  row->render = malloc(sizeof(utf_8_char_t) * (row->size + tabs * (E.constantes.TAB_LENGTH - 1)));
+  
+  if (!row->render) {
+    row->rsize = 0;
+    return;
+  }
 
-  // end of counting
   i_render = 0;
   for (i = 0; i < row->size; ++i) {
-    if (row->chars[i] == '\t') {
-      row->render[i_render++] = ' ';
+    if (is_tab(&row->chars[i])) {
+      // Replace tab with spaces
+      row->render[i_render++] = make_space();
       while (i_render % E.constantes.TAB_LENGTH) {
-        row->render[i_render++] =
-            ' '; /**< Addind the right amount of spaces for tabs */
+        row->render[i_render++] = make_space();
       }
     } else {
       row->render[i_render++] = row->chars[i];
     }
   }
-  row->render[i_render] = '\0'; // Don't forget the end of string character.
   row->rsize = i_render;
 }
 
 void editorInsertRow(int at, char *s, size_t len) {
   if (at < 0 || at > E.numrows) {
-    
     return;
   }
+  
   erow *tmp = (erow *)realloc(E.row, sizeof(erow) * (E.numrows + 1));
   if (!tmp) {
     return;
@@ -80,19 +102,78 @@ void editorInsertRow(int at, char *s, size_t len) {
   E.row = tmp;
   memmove(&E.row[at + 1], &E.row[at], sizeof(erow) * (E.numrows - at));
 
-  E.row[at].size = len;
-  E.row[at].chars = malloc(len + 1);
-  memcpy(E.row[at].chars, s, len);
-  E.row[at].chars[len] = '\0';
-
+  // Initialize the new row
+  E.row[at].size = 0;
+  E.row[at].chars = NULL;
   E.row[at].rsize = 0;
   E.row[at].render = NULL;
+
+  // Count UTF-8 characters first
+  int char_count = 0;
+  int i = 0;
+  while (i < len) {
+    unsigned char first = (unsigned char)s[i];
+    int char_len;
+    
+    if ((first & 0x80) == 0) {
+      char_len = 1;
+    } else if ((first & 0xE0) == 0xC0) {
+      char_len = 2;
+    } else if ((first & 0xF0) == 0xE0) {
+      char_len = 3;
+    } else if ((first & 0xF8) == 0xF0) {
+      char_len = 4;
+    } else {
+      char_len = 1; // Invalid, treat as single byte
+    }
+    
+    i += char_len;
+    char_count++;
+  }
+
+  // Allocate for the actual number of characters
+  if (char_count > 0) {
+    E.row[at].chars = malloc(sizeof(utf_8_char_t) * char_count);
+    if (!E.row[at].chars) {
+      return;
+    }
+  }
+  
+  // Now convert to utf_8_char_t array
+  i = 0;
+  E.row[at].size = 0;
+  while (i < len && E.row[at].size < char_count) {
+    utf_8_char_t ch;
+    
+    unsigned char first = (unsigned char)s[i];
+    if ((first & 0x80) == 0) {
+      ch.len = 1;
+    } else if ((first & 0xE0) == 0xC0) {
+      ch.len = 2;
+    } else if ((first & 0xF0) == 0xE0) {
+      ch.len = 3;
+    } else if ((first & 0xF8) == 0xF0) {
+      ch.len = 4;
+    } else {
+      ch.len = 1;
+    }
+    
+    // Copy bytes
+    for (int j = 0; j < ch.len && i < len; j++) {
+      ch.c[j] = s[i++];
+    }
+    
+    E.row[at].chars[E.row[at].size++] = ch;
+  }
+
   editorUpdateRow(&E.row[at]);
 
+  
   ++E.numrows;
   ++E.dirty;
 }
 
+
 void editorFreeRow(erow *row) {
   free(row->render);
   free(row->chars);
@@ -112,16 +193,17 @@ void editorDelRow(int at) {
  * \fn editorRowInsertChar(erow *row, int at, int c)
  * \param at Index of where we want to insert the char */
 
-void editorRowInsertChar(erow *row, int at, int c) {
+void editorRowInsertChar(erow *row, int at, utf_8_char_t c) {
   if (E.state == READ_ONLY)
     return;
   if (at < 0 || at > row->size) {
     at = row->size;
   }
-  row->chars = realloc(row->chars, row->size + 2);
+  row->chars = realloc(row->chars, row->size + 1);
   memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
-  ++row->size;
+  ++(row->size);
   row->chars[at] = c;
+  fprintf(stderr, "Row insert : %s %d\n", c.c, c.len);
   editorUpdateRow(row);
   ++E.dirty;
 }
@@ -130,7 +212,6 @@ void editorRowAppendString(erow *row, char *s, size_t len) {
   row->chars = realloc(row->chars, row->size + len + 1);
   memcpy(&row->chars[row->size], s, len);
   row->size += len;
-  row->chars[row->size] = '\0';
   editorUpdateRow(row);
   ++E.dirty;
 }

src/syntax_highlighter.c

@@ -1,163 +0,0 @@
-#include "../include/syntax_highlighter.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-const char *c_keywords[] = {
-    "if", "else", "while", "for", "do", "switch", "case", "break",
-    "continue", "return", "goto", "struct", "union", "enum",
-    "typedef", "static", "extern", "const", "volatile", "sizeof",
-    "auto", "register", "inline", "restrict", NULL
-};
-
-// C types
-const char *c_types[] = {
-    "int", "char", "float", "double", "void", "long", "short",
-    "unsigned", "signed", "bool", NULL
-};
-
-// Check if character is alphanumeric or underscore
-int is_word_char(char c) {
-    return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
-           (c >= '0' && c <= '9') || c == '_';
-}
-
-// Check if string is a keyword
-int is_keyword(const char *word) {
-    for (int i = 0; c_keywords[i] != NULL; i++) {
-        if (strcmp(word, c_keywords[i]) == 0) return 1;
-    }
-    return 0;
-}
-
-// Check if string is a type
-int is_type(const char *word) {
-    for (int i = 0; c_types[i] != NULL; i++) {
-        if (strcmp(word, c_types[i]) == 0) return 1;
-    }
-    return 0;
-}
-
-// Get color code for token type
-const char *get_color(TokenType type) {
-    switch (type) {
-        case TOKEN_KEYWORD: return COLOR_KEYWORD;
-        case TOKEN_TYPE: return COLOR_TYPE;
-        case TOKEN_STRING: return COLOR_STRING;
-        case TOKEN_COMMENT: return COLOR_COMMENT;
-        case TOKEN_NUMBER: return COLOR_NUMBER;
-        default: return COLOR_DEFAULT;
-    }
-}
-
-// Highlight a line of C code and return the highlighted string
-// Returns a newly allocated string that must be freed by the caller
-char *highlight_line(const char *line, int *length) {
-    char *result = malloc(1024);  // Allocate space for result
-    int result_pos = 0;
-    int i = 0;
-    
-    while (line[i] != '\0' && line[i] != '\n') {
-        // Skip whitespace
-        if (line[i] == ' ' || line[i] == '\t') {
-            result[result_pos++] = line[i++];
-            continue;
-        }
-        
-        // Handle line comments
-        if (line[i] == '/' && line[i + 1] == '/') {
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_COMMENT);
-            while (line[i] != '\0' && line[i] != '\n') {
-                result[result_pos++] = line[i++];
-            }
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_RESET);
-            continue;
-        }
-        
-        // Handle block comments
-        if (line[i] == '/' && line[i + 1] == '*') {
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_COMMENT);
-            result[result_pos++] = line[i++];
-            result[result_pos++] = line[i++];
-            while (line[i] != '\0') {
-                if (line[i] == '*' && line[i + 1] == '/') {
-                    result[result_pos++] = line[i++];
-                    result[result_pos++] = line[i++];
-                    break;
-                }
-                result[result_pos++] = line[i++];
-            }
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_RESET);
-            continue;
-        }
-        
-        // Handle strings
-        if (line[i] == '"') {
-            result_pos += sprintf(&result[result_pos], "%s\"", COLOR_STRING);
-            i++;
-            while (line[i] != '\0' && line[i] != '"') {
-                if (line[i] == '\\') {
-                    result[result_pos++] = line[i++];
-                    result[result_pos++] = line[i++];
-                } else {
-                    result[result_pos++] = line[i++];
-                }
-            }
-            if (line[i] == '"') result[result_pos++] = line[i++];
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_RESET);
-            continue;
-        }
-        
-        // Handle character literals
-        if (line[i] == '\'') {
-            result_pos += sprintf(&result[result_pos], "%s'", COLOR_STRING);
-            i++;
-            while (line[i] != '\0' && line[i] != '\'') {
-                if (line[i] == '\\') {
-                    result[result_pos++] = line[i++];
-                    result[result_pos++] = line[i++];
-                } else {
-                    result[result_pos++] = line[i++];
-                }
-            }
-            if (line[i] == '\'') result[result_pos++] = line[i++];
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_RESET);
-            continue;
-        }
-        
-        // Handle numbers
-        if (line[i] >= '0' && line[i] <= '9') {
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_NUMBER);
-            while (is_word_char(line[i]) || line[i] == '.') {
-                result[result_pos++] = line[i++];
-            }
-            result_pos += sprintf(&result[result_pos], "%s", COLOR_RESET);
-            continue;
-        }
-        
-        // Handle identifiers and keywords
-        if (is_word_char(line[i])) {
-            int start = i;
-            while (is_word_char(line[i])) i++;
-            
-            char word[256];
-            strncpy(word, &line[start], i - start);
-            word[i - start] = '\0';
-            
-            TokenType type = TOKEN_DEFAULT;
-            if (is_keyword(word)) type = TOKEN_KEYWORD;
-            else if (is_type(word)) type = TOKEN_TYPE;
-            
-            result_pos += sprintf(&result[result_pos], "%s%s%s", 
-                                 get_color(type), word, COLOR_RESET);
-            continue;
-        }
-        
-        // Handle operators and other characters
-        result[result_pos++] = line[i++];
-    }
-
-    result[result_pos] = '\0';
-    *length = result_pos + 1;
-    return result;
-}

src/terminal.c

@@ -2,6 +2,8 @@
 #include "../include/data.h"
 
 #include <stdio.h>
+#include <unistd.h>
+#include <string.h>
 
 void die(const char *s) {
   write(STDOUT_FILENO, "\x1b[2J", 4);
@@ -35,73 +37,211 @@ void enableRawMode() {
   }
 }
 
-int editorReadKey() {
-  int nread;
-  char c;
-  char seq[3];
-  while ((nread = read(STDIN_FILENO, &c, 1)) != 1) {
-    if (nread == -1 && errno != EAGAIN) {
-      die("read");
+int utf8_char_length(unsigned char first_byte) {
+  if ((first_byte & 0x80) == 0)
+    return 1; // 0xxxxxxx - ASCII
+  if ((first_byte & 0xE0) == 0xC0)
+    return 2; // 110xxxxx - 2 bytes
+  if ((first_byte & 0xF0) == 0xE0)
+    return 3; // 1110xxxx - 3 bytes
+  if ((first_byte & 0xF8) == 0xF0)
+    return 4; // 11110xxx - 4 bytes
+  return 1;   // Invalid, treat as single byte
+}
+
+// Convert UTF-8 to Unicode code point
+unsigned int utf8_to_codepoint(const unsigned char *bytes, int len) {
+  if (len == 1)
+    return bytes[0];
+  if (len == 2)
+    return ((bytes[0] & 0x1F) << 6) | (bytes[1] & 0x3F);
+  if (len == 3)
+    return ((bytes[0] & 0x0F) << 12) | ((bytes[1] & 0x3F) << 6) |
+           (bytes[2] & 0x3F);
+  if (len == 4)
+    return ((bytes[0] & 0x07) << 18) | ((bytes[1] & 0x3F) << 12) |
+           ((bytes[2] & 0x3F) << 6) | (bytes[3] & 0x3F);
+  return 0;
+}
+
+void parse_key(unsigned char *seq, int len, KeyInfo *key) {
+  memcpy(key->c.c, seq, len);
+  key->c.len = len;
+  key->modifiers = MOD_NONE;
+  key->type = KEY_UNKNOWN;
+
+  // Control characters (Ctrl+A to Ctrl+Z)
+  if (len == 1 && seq[0] < 32 && seq[0] != 27 && seq[0] != 9 && seq[0] != 10 &&
+      seq[0] != 13) {
+    key->type = KEY_CTRL;
+    key->data.ctrl_char = seq[0] + 64;
+    return;
+  }
+
+  // Special single characters
+  if (len == 1) {
+    switch (seq[0]) {
+    case 9:
+    case 10:
+    case 13:
+    case 27:
+    case 127:
+      key->type = KEY_SPECIAL;
+      key->data.special = seq[0];
+      return;
     }
   }
 
-  if (c == '\x1b') {
-    if (read(STDIN_FILENO, &seq[0], 1) != 1 ||
-        read(STDIN_FILENO, &seq[1], 1) != 1) {
-      return '\x1b';
+  // Escape sequences
+  if (len >= 2 && seq[0] == 27) {
+    // Alt+key combinations
+    if (len == 2 && seq[1] >= 32 && seq[1] < 127) {
+      key->type = KEY_ALT;
+      key->data.alt_char = seq[1];
+      return;
     }
-    if (seq[0] == '[') {
-      if (seq[1] >= '0' && seq[1] <= '9') {
-        if (read(STDIN_FILENO, &seq[2], 1) != 1) {
-          return '\x1b';
+
+    // CSI sequences (ESC [ ...)
+    if (len >= 3 && seq[1] == '[') {
+      // Arrow keys
+      if (len == 3) {
+        switch (seq[2]) {
+        case 'A':
+        case 'B':
+        case 'C':
+        case 'D':
+          key->type = KEY_ARROW;
+          key->data.arrow = seq[2];
+          return;
+        case 'H':
+        case 'F':
+          key->type = KEY_NAVIGATION;
+          key->data.special = seq[2];
+          return;
         }
-        if (seq[2] == '~') {
-          switch (seq[1]) {
-          case '1':
-            return BEG_LINE;
-          case '3':
-            return DEL_KEY;
-          case '4':
-            return END_LINE;
-          case '5':
-            return PAGE_UP;
-          case '6':
-            return PAGE_DOWN;
-          case '7':
-            return BEG_LINE;
-          case '8':
-            return END_LINE;
+      }
+
+      // Modified keys (ESC [ 1 ; modifier letter)
+      if (len >= 6 && seq[2] == '1' && seq[3] == ';') {
+        int modifier = seq[4] - '0';
+        char k = seq[5];
+
+        if (modifier & 1)
+          key->modifiers |= MOD_SHIFT;
+        if (modifier & 2)
+          key->modifiers |= MOD_ALT;
+        if (modifier & 4)
+          key->modifiers |= MOD_CTRL;
+
+        switch (k) {
+        case 'A':
+        case 'B':
+        case 'C':
+        case 'D':
+          key->type = KEY_ARROW;
+          key->data.arrow = k;
+          return;
+        case 'H':
+        case 'F':
+          key->type = KEY_NAVIGATION;
+          key->data.special = k;
+          return;
+        }
+      }
+
+      // Function keys and navigation
+      if (len == 4 && seq[3] == '~') {
+        int num = seq[2] - '0';
+        if (num >= 1 && num <= 6) {
+          key->type = KEY_NAVIGATION;
+          key->data.special = seq[2];
+          return;
+        }
+      }
+
+      if (len == 5 && seq[4] == '~') {
+        int num = (seq[2] - '0') * 10 + (seq[3] - '0');
+        if (num >= 15 && num <= 24) {
+          key->type = KEY_FUNCTION;
+          // Map to F5-F12
+          int f_map[] = {15, 17, 18, 19, 20, 21, 23, 24};
+          for (int i = 0; i < 8; i++) {
+            if (f_map[i] == num) {
+              key->data.function_num = i + 5;
+              return;
+            }
           }
         }
-      } else {
-
-        switch (seq[1]) {
-        case 'A':
-          return ARROW_UP;
-        case 'B':
-          return ARROW_DOWN;
-        case 'C':
-          return ARROW_RIGHT;
-        case 'D':
-          return ARROW_LEFT;
-        case 'H':
-          return BEG_LINE;
-        case 'F':
-          return END_LINE;
-        }
-      }
-    } else if (seq[0] == 'O') {
-      switch (seq[1]) {
-      case 'H':
-        return BEG_LINE;
-      case 'F':
-        return END_LINE;
       }
     }
-    return '\x1b';
-  } else {
-    return c;
+
+    // SS3 sequences (ESC O ...)
+    if (len == 3 && seq[1] == 'O') {
+      switch (seq[2]) {
+      case 'P':
+      case 'Q':
+      case 'R':
+      case 'S':
+        key->type = KEY_FUNCTION;
+        key->data.function_num = seq[2] - 'P' + 1;
+        return;
+      case 'H':
+      case 'F':
+        key->type = KEY_NAVIGATION;
+        key->data.special = seq[2];
+        return;
+      }
+    }
   }
+
+  // UTF-8 character
+  if (seq[0] >= 32 || (seq[0] & 0x80)) {
+    int char_len = utf8_char_length(seq[0]);
+    fprintf(stderr, "char length : %d\n", char_len);
+    if (char_len <= len) {
+      key->type = KEY_CHAR;
+      memcpy(key->c.c, seq, len);
+      key->c.len = len;
+      return;
+    }
+  }
+}
+
+KeyInfo *editorReadKey() {
+  fd_set fds;
+  int timeout_ms = 10;
+  struct timeval tv;
+  int total = 0;
+  KeyInfo *key = (KeyInfo *)malloc(sizeof(KeyInfo));
+  int len;
+  unsigned char buffer[20];
+
+  if (read(STDIN_FILENO, &buffer[0], 1) <= 0)
+    return 0;
+
+  while (total < 20) {
+    FD_ZERO(&fds);
+    FD_SET(STDIN_FILENO, &fds);
+    tv.tv_sec = 0;
+    tv.tv_usec = timeout_ms * 1000;
+
+    int ret = select(STDIN_FILENO + 1, &fds, NULL, NULL, &tv);
+    if (ret <= 0)
+      break;
+
+    if (read(STDIN_FILENO, &buffer[total], 1) <= 0)
+      break;
+    total++;
+  }
+  total++;
+
+  parse_key(buffer, total, key);
+
+  // DEBUG
+
+  fprintf(stderr, "%s %d %d %s %d\n", buffer, buffer[0], buffer[1], key->c.c, key->c.len);
+  
+  return key;
 }
 
 int getCursorPosition(int *rows, int *cols) {