int
rcz_file_size(
int in_fd
)
{
unsigned int version, length;
alloc_buf(in_fd);
b_lseek(in_fd, 0, 0);
version = get_byte(in_fd);
version = (version<<8) | (get_byte(in_fd));
version = (version<<8) | (get_byte(in_fd));
version = (version<<8) | (get_byte(in_fd));
if(version != METHOD_17_JUL_95) {
return (-1);
// fprintf(stderr, "Incompatible version.\n");
// return(0);
}
length = get_byte(in_fd);
length = (length<<8) | (get_byte(in_fd));
length = (length<<8) | (get_byte(in_fd));
length = (length<<8) | (get_byte(in_fd));
free_buf();
return length;
}
static uint32_t load_keyboard_layout_file(const char *filename) {
int fd;
char magic[KEYBOARD_LAYOUTS_MAGIC_SIZE];
uint32_t version;
if ((fd = open_bvdev("bt(0,0)", filename, 0)) < 0) {
goto fail; // fail
}
if (read(fd, magic, sizeof(magic)) != sizeof(magic)) {
printf("Can't find magic in keyboard layout file: %s\n", filename);
goto fail;
}
if (memcmp (magic, KEYBOARD_LAYOUTS_MAGIC, KEYBOARD_LAYOUTS_MAGIC_SIZE) != 0) {
printf("Invalid magic code in keyboard layout file: %s\n", filename);
goto fail;
}
if (read(fd, (char*) &version, sizeof(version)) != sizeof(version)) {
printf("Can't get version of keyboard layout file: %s\n", filename);
goto fail;
}
if (version != KEYBOARD_LAYOUTS_VERSION) {
verbose("Bad version for keyboard layout file %s expected v%d found v%d\n",
filename, KEYBOARD_LAYOUTS_VERSION, version);
goto fail;
}
if (current_layout)
free(current_layout);
current_layout = malloc(sizeof(*current_layout));
if (!current_layout)
goto fail;
b_lseek(fd, KEYBOARD_LAYOUTS_MAP_OFFSET, 0);
if (read(fd, (char*) current_layout, sizeof(*current_layout)) != sizeof(*current_layout)) {
printf("Wrong keyboard layout file %s size\n", filename);
goto fail;
}
close(fd);
return 1;
fail:
if (current_layout) {
free(current_layout);
current_layout = NULL;
}
return 0;
}
int
rcz_decompress_file(
int in_fd,
unsigned char *out
)
/* Returns actual number of bytes emitted as decompressed stream 'out.'
Note that the 'in' stream contains this byte count already.
Returns -1 if the input stream was not in compressed format.
*/
{
unsigned int c, j, k, jmatch, jabove;
int length;
unsigned int even_length, word, token;
unsigned char *outorigin = out;
length = rcz_file_size(in_fd);
if (length < 0)
return length;
alloc_buf(in_fd);
b_lseek(in_fd, 8, 0);
for(c=0; c < QLEN; c++) que[c] = c;
even_length = 2*(length/2);
while((int)(out-outorigin) < even_length) {
token = get_byte(in_fd);
token = (token<<8) | (get_byte(in_fd));
token = (token<<8) | (get_byte(in_fd));
token = (token<<8) | (get_byte(in_fd));
c = 1<<31;
for(k = 0; k<32; k++) {
if(c & token) {
jmatch = get_byte(in_fd);
word = que[jmatch];
/* Next, dynamically process the queue for match. */
jabove = (F1*jmatch) >> 4;
for(j = jmatch; j > jabove; j--) {
que[j] = que[j-1];
}
que[jabove] = word;
} else {
/* Next, dynamically process the queue for unmatch. */
word = get_byte(in_fd);
word = (word << 8) | (get_byte(in_fd));
for(j=QLEN-1; j > ABOVE; j--) {
que[j] = que[j-1];
}
que[ABOVE] = word;
}
*out++ = (word >> 8) & 0xff;
*out++ = (word) & 0xff;
if((int)(out-outorigin) >= even_length) break;
c >>= 1;
}
