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: struct key_range {
   36:     int start;
   37:     int end;
   38:     struct key_range *next;
   39: };
   40: 
   41: #define MAX_NORMAL_KEYCODE 512
   42: #define MAX_EXTRA_COUNT 256
   43: typedef struct {
   44:     uint16_t keysym2keycode[MAX_NORMAL_KEYCODE];
   45:     struct {
   46:         int keysym;
   47:         uint16_t keycode;
   48:     } keysym2keycode_extra[MAX_EXTRA_COUNT];
   49:     int extra_count;
   50:     struct key_range *keypad_range;
   51:     struct key_range *numlock_range;
   52: } kbd_layout_t;
   53: 
   54: static void add_to_key_range(struct key_range **krp, int code) {
   55:     struct key_range *kr;
   56:     for (kr = *krp; kr; kr = kr->next) {
   57:         if (code >= kr->start && code <= kr->end)
   58:             break;
   59:         if (code == kr->start - 1) {
   60:             kr->start--;
   61:             break;
   62:         }
   63:         if (code == kr->end + 1) {
   64:             kr->end++;
   65:             break;
   66:         }
   67:     }
   68:     if (kr == NULL) {
   69:         kr = qemu_mallocz(sizeof(*kr));
   70:         if (kr) {
   71:             kr->start = kr->end = code;
   72:             kr->next = *krp;
   73:             *krp = kr;
   74:         }
   75:     }
   76: }
   77: 
   78: static kbd_layout_t *parse_keyboard_layout(const char *language,
   79:                                            kbd_layout_t * k)
   80: {
   81:     FILE *f;
   82:     char file_name[1024];
   83:     char line[1024];
   84:     int len;
   85: 
   86:     snprintf(file_name, sizeof(file_name),
   87:              "%s/keymaps/%s", bios_dir, language);
   88: 
   89:     if (!k)
   90:         k = qemu_mallocz(sizeof(kbd_layout_t));
   91:     if (!k)
   92:         return 0;
   93:     if (!(f = fopen(file_name, "r"))) {
   94:         fprintf(stderr,
   95:                 "Could not read keymap file: '%s'\n", file_name);
   96:         return 0;
   97:     }
   98:     for(;;) {
   99:         if (fgets(line, 1024, f) == NULL)
  100:             break;
  101:         len = strlen(line);
  102:         if (len > 0 && line[len - 1] == '\n')
  103:             line[len - 1] = '\0';
  104:         if (line[0] == '#')
  105:             continue;
  106:         if (!strncmp(line, "map ", 4))
  107:             continue;
  108:         if (!strncmp(line, "include ", 8)) {
  109:             parse_keyboard_layout(line + 8, k);
  110:         } else {
  111:             char *end_of_keysym = line;
  112:             while (*end_of_keysym != 0 && *end_of_keysym != ' ')
  113:                 end_of_keysym++;
  114:             if (*end_of_keysym) {
  115:                 int keysym;
  116:                 *end_of_keysym = 0;
  117:                 keysym = get_keysym(line);
  118:                 if (keysym == 0) {
  119:                     //              fprintf(stderr, "Warning: unknown keysym %s\n", line);
  120:                 } else {
  121:                     const char *rest = end_of_keysym + 1;
  122:                     char *rest2;
  123:                     int keycode = strtol(rest, &rest2, 0);
  124: 
  125:                     if (rest && strstr(rest, "numlock")) {
  126:                         add_to_key_range(&k->keypad_range, keycode);
  127:                         add_to_key_range(&k->numlock_range, keysym);
  128:                         //fprintf(stderr, "keypad keysym %04x keycode %d\n", keysym, keycode);
  129:                     }
  130: 
  131:                     /* if(keycode&0x80)
  132:                        keycode=(keycode<<8)^0x80e0; */
  133:                     if (keysym < MAX_NORMAL_KEYCODE) {
  134:                         //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);
  135:                         k->keysym2keycode[keysym] = keycode;
  136:                     } else {
  137:                         if (k->extra_count >= MAX_EXTRA_COUNT) {
  138:                             fprintf(stderr,
  139:                                     "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",
  140:                                     line, keysym);
  141:                         } else {
  142: #if 0
  143:                             fprintf(stderr, "Setting %d: %d,%d\n",
  144:                                     k->extra_count, keysym, keycode);
  145: #endif
  146:                             k->keysym2keycode_extra[k->extra_count].
  147:                                 keysym = keysym;
  148:                             k->keysym2keycode_extra[k->extra_count].
  149:                                 keycode = keycode;
  150:                             k->extra_count++;
  151:                         }
  152:                     }
  153:                 }
  154:             }
  155:         }
  156:     }
  157:     fclose(f);
  158:     return k;
  159: }
  160: 
  161: static void *init_keyboard_layout(const char *language)
  162: {
  163:     return parse_keyboard_layout(language, 0);
  164: }
  165: 
  166: static int keysym2scancode(void *kbd_layout, int keysym)
  167: {
  168:     kbd_layout_t *k = kbd_layout;
  169:     if (keysym < MAX_NORMAL_KEYCODE) {
  170:         if (k->keysym2keycode[keysym] == 0)
  171:             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
  172:                     keysym);
  173:         return k->keysym2keycode[keysym];
  174:     } else {
  175:         int i;
  176: #ifdef XK_ISO_Left_Tab
  177:         if (keysym == XK_ISO_Left_Tab)
  178:             keysym = XK_Tab;
  179: #endif
  180:         for (i = 0; i < k->extra_count; i++)
  181:             if (k->keysym2keycode_extra[i].keysym == keysym)
  182:                 return k->keysym2keycode_extra[i].keycode;
  183:     }
  184:     return 0;
  185: }
  186: 
  187: static inline int keycode_is_keypad(void *kbd_layout, int keycode)
  188: {
  189:     kbd_layout_t *k = kbd_layout;
  190:     struct key_range *kr;
  191: 
  192:     for (kr = k->keypad_range; kr; kr = kr->next)
  193:         if (keycode >= kr->start && keycode <= kr->end)
  194:             return 1;
  195:     return 0;
  196: }
  197: 
  198: static inline int keysym_is_numlock(void *kbd_layout, int keysym)
  199: {
  200:     kbd_layout_t *k = kbd_layout;
  201:     struct key_range *kr;
  202: 
  203:     for (kr = k->numlock_range; kr; kr = kr->next)
  204:         if (keysym >= kr->start && keysym <= kr->end)
  205:             return 1;
  206:     return 0;
  207: }