SerialFlashFile SerialFlashChip::open(const char *filename)
{
uint32_t maxfiles, straddr;
uint16_t hash, hashtable[8];
uint32_t i, n, index=0;
uint32_t buf[3];
SerialFlashFile file;
maxfiles = check_signature();
//Serial.printf("sig: %08X\n", maxfiles);
if (!maxfiles) return file;
maxfiles &= 0xFFFF;
hash = filename_hash(filename);
//Serial.printf("hash %04X for \"%s\"\n", hash, filename);
while (index < maxfiles) {
n = 8;
if (n > maxfiles - index) n = maxfiles - index;
SerialFlash.read(8 + index * 2, hashtable, n * 2);
//Serial.printf(" read %u: ", 8 + index * 2);
//pbuf(hashtable, n * 2);
for (i=0; i < n; i++) {
if (hashtable[i] == hash) {
//Serial.printf(" hash match at index %u\n", index+i);
buf[2] = 0;
SerialFlash.read(8 + maxfiles * 2 + (index+i) * 10, buf, 10);
//Serial.printf(" maxf=%d, index=%d, i=%d\n", maxfiles, index, i);
//Serial.printf(" read %u: ", 8 + maxfiles * 2 + (index+i) * 10);
//pbuf(buf, 10);
straddr = 8 + maxfiles * 12 + buf[2] * 4;
//Serial.printf(" straddr = %u\n", straddr);
if (filename_compare(filename, straddr)) {
//Serial.printf(" match!\n");
//Serial.printf(" addr = %u\n", buf[0]);
//Serial.printf(" len = %u\n", buf[1]);
file.address = buf[0];
file.length = buf[1];
file.offset = 0;
file.dirindex = index + i;
return file;
}
} else if (hashtable[i] == 0xFFFF) {
return file;
}
}
index += n;
}
return file;
}
list_iter boxpath_first_part(boxpath * bpath)
{
list_iter it;
boxfile * part;
if(!boxpath_getfile(bpath)) return NULL;
it = list_get_iter(bpath->dir->pieces);
while(it && (filename_compare(bpath->file, list_iter_getval(it)) > 0))
it = list_iter_next(it);
if(it) {
part = (boxfile*) list_iter_getval(it);
if(strncmp(bpath->base, part->name, strlen(bpath->base)))
return NULL;
}
return it;
}
