Archipelago » qemu

/*

 * QEMU keysym to keycode conversion using rdesktop keymaps

 *

 * Copyright (c) 2004 Johannes Schindelin

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

static int get_keysym(const char *name)

{

    const name2keysym_t *p;

    for(p = name2keysym; p->name != NULL; p++) {

        if (!strcmp(p->name, name))

            return p->keysym;

    }

    return 0;

}

struct key_range {

    int start;

    int end;

    struct key_range *next;

};

#define MAX_NORMAL_KEYCODE 512

#define MAX_EXTRA_COUNT 256

typedef struct {

    uint16_t keysym2keycode[MAX_NORMAL_KEYCODE];

    struct {

        int keysym;

        uint16_t keycode;

    } keysym2keycode_extra[MAX_EXTRA_COUNT];

    int extra_count;

    struct key_range *keypad_range;

    struct key_range *numlock_range;

} kbd_layout_t;

static void add_to_key_range(struct key_range **krp, int code) {

    struct key_range *kr;

    for (kr = *krp; kr; kr = kr->next) {

        if (code >= kr->start && code <= kr->end)

            break;

        if (code == kr->start - 1) {

            kr->start--;

            break;

        }

        if (code == kr->end + 1) {

            kr->end++;

            break;

        }

    }

    if (kr == NULL) {

        kr = qemu_mallocz(sizeof(*kr));

        kr->start = kr->end = code;

        kr->next = *krp;

        *krp = kr;

    }

}

static kbd_layout_t *parse_keyboard_layout(const char *language,

                                           kbd_layout_t * k)

{

    FILE *f;

    char file_name[1024];

    char line[1024];

    int len;

    snprintf(file_name, sizeof(file_name),

             "%s/keymaps/%s", bios_dir, language);

    if (!k)

        k = qemu_mallocz(sizeof(kbd_layout_t));

    if (!(f = fopen(file_name, "r"))) {

        fprintf(stderr,

                "Could not read keymap file: '%s'\n", file_name);

        return 0;

    }

    for(;;) {

        if (fgets(line, 1024, f) == NULL)

            break;

        len = strlen(line);

        if (len > 0 && line[len - 1] == '\n')

            line[len - 1] = '\0';

        if (line[0] == '#')

            continue;

        if (!strncmp(line, "map ", 4))

            continue;

        if (!strncmp(line, "include ", 8)) {

            parse_keyboard_layout(line + 8, k);

        } else {

            char *end_of_keysym = line;

            while (*end_of_keysym != 0 && *end_of_keysym != ' ')

                end_of_keysym++;

            if (*end_of_keysym) {

                int keysym;

                *end_of_keysym = 0;

                keysym = get_keysym(line);

                if (keysym == 0) {

                    //                    fprintf(stderr, "Warning: unknown keysym %s\n", line);

                } else {

                    const char *rest = end_of_keysym + 1;

                    char *rest2;

                    int keycode = strtol(rest, &rest2, 0);

                    if (rest && strstr(rest, "numlock")) {

                        add_to_key_range(&k->keypad_range, keycode);

                        add_to_key_range(&k->numlock_range, keysym);

                        //fprintf(stderr, "keypad keysym %04x keycode %d\n", keysym, keycode);

                    }

                    /* if(keycode&0x80)

                       keycode=(keycode<<8)^0x80e0; */

                    if (keysym < MAX_NORMAL_KEYCODE) {

                        //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);

                        k->keysym2keycode[keysym] = keycode;

                    } else {

                        if (k->extra_count >= MAX_EXTRA_COUNT) {

                            fprintf(stderr,

                                    "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",

                                    line, keysym);

                        } else {

#if 0

                            fprintf(stderr, "Setting %d: %d,%d\n",

                                    k->extra_count, keysym, keycode);

#endif

                            k->keysym2keycode_extra[k->extra_count].

                                keysym = keysym;

                            k->keysym2keycode_extra[k->extra_count].

                                keycode = keycode;

                            k->extra_count++;

                        }

                    }

                }

            }

        }

    }

    fclose(f);

    return k;

}

static void *init_keyboard_layout(const char *language)

{

    return parse_keyboard_layout(language, 0);

}

static int keysym2scancode(void *kbd_layout, int keysym)

{

    kbd_layout_t *k = kbd_layout;

    if (keysym < MAX_NORMAL_KEYCODE) {

        if (k->keysym2keycode[keysym] == 0)

            fprintf(stderr, "Warning: no scancode found for keysym %d\n",

                    keysym);

        return k->keysym2keycode[keysym];

    } else {

        int i;

#ifdef XK_ISO_Left_Tab

        if (keysym == XK_ISO_Left_Tab)

            keysym = XK_Tab;

#endif

        for (i = 0; i < k->extra_count; i++)

            if (k->keysym2keycode_extra[i].keysym == keysym)

                return k->keysym2keycode_extra[i].keycode;

    }

    return 0;

}

static inline int keycode_is_keypad(void *kbd_layout, int keycode)

{

    kbd_layout_t *k = kbd_layout;

    struct key_range *kr;

    for (kr = k->keypad_range; kr; kr = kr->next)

        if (keycode >= kr->start && keycode <= kr->end)

            return 1;

    return 0;

}

static inline int keysym_is_numlock(void *kbd_layout, int keysym)

{

    kbd_layout_t *k = kbd_layout;

    struct key_range *kr;

    for (kr = k->numlock_range; kr; kr = kr->next)

        if (keysym >= kr->start && keysym <= kr->end)

            return 1;

    return 0;

}