keysym2scancode.c

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/* *******************************************************
 This file is part of fbvncserver.

 fbvncserver is free software; you can redistribute it
 and/or modify it under the terms of the
 GNU General Public License as published by
 the Free Software Foundation; either version 2 of the
 License, or (at your option) any later version.

 fbvncserver is distributed in the hope that it will be
 useful, but WITHOUT ANY WARRANTY; without even the
 implied warranty of MERCHANTABILITY or FITNESS FOR A
 PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.

 You should have received a copy of the GNU General Public
 License along with fbvncserver; if not, write to the
 Free Software Foundation, Inc., 51 Franklin St,
 Fifth Floor, Boston, MA  02110-1301  USA
 ********************************************************/

/* Project: */
#include "keysym2scancode.h"

static int get_keysym(const char *name)
{
    name2keysym_t *p;
    for(p = name2keysym; p->name != NULL; p++) {
        if (!strcmp(p->name, name))
            return p->keysym;
    }
    return 0;
}

#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;
} kbd_layout_t;

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;
    char *dir = CONFIGBASEDIR;

    snprintf(file_name, sizeof(file_name),
             "%s/keymaps/%s", dir, language);

    if (!k)
        k = malloc(sizeof(kbd_layout_t));
    if (!k)
        return 0;
    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;
                    int keycode = strtol(rest, NULL, 0);
                    /* 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;
}

void* init_keyboard_layout(const char *language)
{
    return parse_keyboard_layout(language, 0);
} // end of [init_keyboard_layout]

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;
}

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