keymaps.c

   1 /*
   2  * QEMU keysym to keycode conversion using rdesktop keymaps
   3  *
   4  * Copyright (c) 2004 Johannes Schindelin
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 static int get_keysym(const char *name)
  26 {
  27     name2keysym_t *p;
  28     for(p = name2keysym; p->name != NULL; p++) {
  29         if (!strcmp(p->name, name))
  30             return p->keysym;
  31     }
  32     return 0;
  33 }
  34
  35 #define MAX_NORMAL_KEYCODE 512
  36 #define MAX_EXTRA_COUNT 256
  37 typedef struct {
  38     uint16_t keysym2keycode[MAX_NORMAL_KEYCODE];
  39     struct {
  40         int keysym;
  41         uint16_t keycode;
  42     } keysym2keycode_extra[MAX_EXTRA_COUNT];
  43     int extra_count;
  44 } kbd_layout_t;
  45
  46 static kbd_layout_t *parse_keyboard_layout(const char *language,
  47                                            kbd_layout_t * k)
  48 {
  49     FILE *f;
  50     char file_name[1024];
  51     char line[1024];
  52     int len;
  53
  54     snprintf(file_name, sizeof(file_name),
  55              "%s/keymaps/%s", bios_dir, language);
  56
  57     if (!k)
  58         k = qemu_mallocz(sizeof(kbd_layout_t));
  59     if (!k)
  60         return 0;
  61     if (!(f = fopen(file_name, "r"))) {
  62         fprintf(stderr,
  63                 "Could not read keymap file: '%s'\n", file_name);
  64         return 0;
  65     }
  66     for(;;) {
  67         if (fgets(line, 1024, f) == NULL)
  68             break;
  69         len = strlen(line);
  70         if (len > 0 && line[len - 1] == '\n')
  71             line[len - 1] = '\0';
  72         if (line[0] == '#')
  73             continue;
  74         if (!strncmp(line, "map ", 4))
  75             continue;
  76         if (!strncmp(line, "include ", 8)) {
  77             parse_keyboard_layout(line + 8, k);
  78         } else {
  79             char *end_of_keysym = line;
  80             while (*end_of_keysym != 0 && *end_of_keysym != ' ')
  81                 end_of_keysym++;
  82             if (*end_of_keysym) {
  83                 int keysym;
  84                 *end_of_keysym = 0;
  85                 keysym = get_keysym(line);
  86                 if (keysym == 0) {
  87                     //              fprintf(stderr, "Warning: unknown keysym %s\n", line);
  88                 } else {
  89                     const char *rest = end_of_keysym + 1;
  90                     int keycode = strtol(rest, NULL, 0);
  91                     /* if(keycode&0x80)
  92                        keycode=(keycode<<8)^0x80e0; */
  93                     if (keysym < MAX_NORMAL_KEYCODE) {
  94                         //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);
  95                         k->keysym2keycode[keysym] = keycode;
  96                     } else {
  97                         if (k->extra_count >= MAX_EXTRA_COUNT) {
  98                             fprintf(stderr,
  99                                     "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",
 100                                     line, keysym);
 101                         } else {
 102                             fprintf(stderr, "Setting %d: %d,%d\n",
 103                                     k->extra_count, keysym, keycode);
 104                             k->keysym2keycode_extra[k->extra_count].
 105                                 keysym = keysym;
 106                             k->keysym2keycode_extra[k->extra_count].
 107                                 keycode = keycode;
 108                             k->extra_count++;
 109                         }
 110                     }
 111                 }
 112             }
 113         }
 114     }
 115     fclose(f);
 116     return k;
 117 }
 118
 119 static void *init_keyboard_layout(const char *language)
 120 {
 121     return parse_keyboard_layout(language, 0);
 122 }
 123
 124 static int keysym2scancode(void *kbd_layout, int keysym)
 125 {
 126     kbd_layout_t *k = kbd_layout;
 127     if (keysym < MAX_NORMAL_KEYCODE) {
 128         if (k->keysym2keycode[keysym] == 0)
 129             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
 130                     keysym);
 131         return k->keysym2keycode[keysym];
 132     } else {
 133         int i;
 134 #ifdef XK_ISO_Left_Tab
 135         if (keysym == XK_ISO_Left_Tab)
 136             keysym = XK_Tab;
 137 #endif
 138         for (i = 0; i < k->extra_count; i++)
 139             if (k->keysym2keycode_extra[i].keysym == keysym)
 140                 return k->keysym2keycode_extra[i].keycode;
 141     }
 142     return 0;
 143 }