Add Dvorak number row and AZERTY keyboard layout support

CONFIG.md

@@ -129,10 +129,11 @@ Miscellaneous:
   defaults to `no`.
 * `keyboard_layout` - Specifies a keyboard layout to remap printable
   keystrokes to before they reach the menu and editor. Currently only
-  `dvorak` is supported. If unset, no remapping is applied and keystrokes
-  are used as-is. This assumes the underlying firmware resolves keystrokes
-  as US-QWERTY; on firmware/keyboard combinations that already resolve a
-  different layout natively, this option may produce incorrect output.
+  `dvorak` and `azerty` are supported. If unset, no remapping is applied
+  and keystrokes are used as-is. This assumes the underlying firmware
+  resolves keystrokes as US-QWERTY; on firmware/keyboard combinations that
+  already resolve a different layout natively, this option may produce
+  incorrect output.
 
 Limine interface control options:
 

common/lib/getchar.c

@@ -30,8 +30,41 @@ static const char qwerty_to_dvorak[128] = {
     ['K']='T', ['L']='N', [':']='S', ['"']='_', ['Z']=':', ['X']='Q',
     ['C']='J', ['V']='K', ['B']='X', ['N']='B', ['M']='M',
     ['<']='W', ['>']='V', ['?']='Z',
+
+    ['`']='`', ['1']='1', ['2']='2', ['3']='3', ['4']='4',
+    ['5']='5', ['6']='6', ['7']='7', ['8']='8', ['9']='9',
+    ['0']='0', ['-']='[', ['=']=']',
+
+    ['~']='~', ['!']='!', ['@']='@', ['#']='#', ['$']='$',
+    ['%']='%', ['^']='^', ['&']='&', ['*']='*', ['(']='(',
+    [')']=')', ['_']='{', ['+']='}',
 };
 
+static const unsigned char qwerty_to_azerty[128] = {
+    ['q']='a', ['w']='z', ['e']='e', ['r']='r', ['t']='t',
+    ['y']='y', ['u']='u', ['i']='i', ['o']='o', ['p']='p',
+    ['[']='^', [']']='$', ['\\']='\\', ['a']='q', ['s']='s',
+    ['d']='d', ['f']='f', ['g']='g', ['h']='h', ['j']='j',
+    ['k']='k', ['l']='l', [';']='m', ['\'']='\xF9', ['z']='w', ['x']='x',
+    ['c']='c', ['v']='v', ['b']='b', ['n']='n', ['m']=',',
+    [',']=';', ['.']=':', ['/']='!',
+
+    ['Q']='A', ['W']='Z', ['E']='E', ['R']='R', ['T']='T',
+    ['Y']='Y', ['U']='U', ['I']='I', ['O']='O', ['P']='P',
+    ['|']='|', ['A']='Q', ['S']='S',
+    ['D']='D', ['F']='F', ['G']='G', ['H']='H', ['J']='J',
+    ['K']='K', ['L']='L', [':']='M', ['"']='%', ['Z']='W', ['X']='X',
+    ['C']='C', ['V']='V', ['B']='B', ['N']='N', ['M']='?',
+    ['<']='.', ['>']='/', ['?']='\xA7',
+
+    ['`']='\xB2', ['1']='&', ['2']='\xE9', ['3']='\"', ['4']='\'',
+    ['5']='(', ['6']='-', ['7']='\xE8', ['8']='_', ['9']='\xE7',
+    ['0']='\xE0', ['-']=')', ['=']='=',
+
+    ['!']='1', ['@']='2', ['#']='3', ['$']='4', ['%']='5',
+    ['^']='6', ['&']='7', ['*']='8', ['(']='9', [')']='0',
+    ['_']='\xB0', ['+']='+',
+};
 
 int getchar(void) {
     for (;;) {
@@ -127,6 +160,8 @@ int getchar_internal(uint8_t scancode, uint8_t ascii, uint32_t shift_state) {
 
     if (current_keyboard_layout == KEYBOARD_LAYOUT_DVORAK && qwerty_to_dvorak[(uint8_t)ascii] != 0) {
         return qwerty_to_dvorak[(uint8_t)ascii];
+    } else if (current_keyboard_layout == KEYBOARD_LAYOUT_AZERTY && qwerty_to_azerty[(uint8_t)ascii] != 0) {
+        return qwerty_to_azerty[(uint8_t)ascii];
     }
 
     return ascii;

common/lib/libc.s2.c

@@ -5,7 +5,7 @@
 #include <lib/misc.h>
 
 bool isprint(int c) {
-    return c >= ' ' && c <= '~';
+    return c >= ' ' && c <= 0xff && c != 0x7f;
 }
 
 bool isspace(int c) {

common/menu.c

@@ -54,6 +54,8 @@ static void keyboard_layout_init(void) {
     char *layout = config_get_value(NULL, 0, "keyboard_layout");
     if (layout != NULL && strcasecmp(layout, "dvorak") == 0) {
         current_keyboard_layout = KEYBOARD_LAYOUT_DVORAK;
+    } else if (layout != NULL && strcasecmp(layout, "azerty") == 0) {
+        current_keyboard_layout = KEYBOARD_LAYOUT_AZERTY;
     } else {
         current_keyboard_layout = KEYBOARD_LAYOUT_QWERTY;
     }

common/menu.h

@@ -23,6 +23,7 @@ enum keyboard_layout {
     KEYBOARD_LAYOUT_UNKNOWN = -1,
     KEYBOARD_LAYOUT_QWERTY,
     KEYBOARD_LAYOUT_DVORAK,
+    KEYBOARD_LAYOUT_AZERTY,
 };
 
 extern enum keyboard_layout current_keyboard_layout;