uint8_t* decode_cz_update(const cz_update *ctx, uint8_t* buffer, uint32_t length, uint32_t *output)
{
uint32_t i = 0;
uint32_t k = ctx->key;
if(ctx->size<0x200 || length!=ctx->size) return NULL;
for(;i<0x200;i++)
{
k *= 0x805;
k += 1;
k &= 0xFF;
buffer[i] ^= k;
}
return stbi_zlib_decode_malloc(buffer, &length, output);
}
unsigned char *ramdisk_load (const char *filename, int32_t *outlen)
{
ramdisk_t *ramfile = ramdisk_data;
unsigned char *out;
char *alt_filename;
alt_filename = 0;
/*
* If the file is on disk and is newer than the program, use that in
* preference.
*/
if (file_exists(filename)) {
if (strstr(filename, "data/")) {
if (file_exists_and_is_newer_than(filename,
EXEC_FULL_PATH_AND_NAME)) {
out = file_read_if_exists(filename, outlen);
if (out) {
DBG("Locdisk %s (newer than exec)", filename);
return (out);
}
}
if (file_exists_and_is_newer_than(filename, ".o/ramdisk_data.o")) {
out = file_read_if_exists(filename, outlen);
if (out) {
DBG("Locdisk %s (newer than build)", filename);
return (out);
}
}
if (file_exists_and_is_newer_than(filename, "src/.o/ramdisk_data.o")) {
out = file_read_if_exists(filename, outlen);
if (out) {
DBG("Locdisk %s (newer than src build)", filename);
return (out);
}
}
} else {
out = file_read_if_exists(filename, outlen);
if (out) {
DBG("Locdisk %s (exists locally)", filename);
return (out);
}
}
}
if (EXEC_DIR) {
alt_filename = strprepend(filename, EXEC_DIR);
if (file_exists(alt_filename)) {
if (file_exists_and_is_newer_than(alt_filename,
EXEC_FULL_PATH_AND_NAME)) {
out = file_read_if_exists(alt_filename, outlen);
if (out) {
DBG("Locdisk %s", filename);
myfree(alt_filename);
return (out);
}
}
if (file_exists_and_is_newer_than(alt_filename,
".o/ramdisk_data.o")) {
out = file_read_if_exists(alt_filename, outlen);
if (out) {
DBG("Locdisk %s", filename);
myfree(alt_filename);
return (out);
}
}
if (file_exists_and_is_newer_than(alt_filename,
"src/.o/ramdisk_data.o")) {
out = file_read_if_exists(alt_filename, outlen);
if (out) {
DBG("Locdisk %s", filename);
myfree(alt_filename);
return (out);
}
}
}
}
while (ramfile->filename) {
if (strcmp(ramfile->filename, filename)) {
ramfile++;
continue;
}
if (outlen) {
*outlen = (int)ramfile->len;
}
DBG("Ramdisk %s, %d bytes", filename, ramfile->len);
if (alt_filename) {
myfree(alt_filename);
}
uint8_t *copy = (TYPEOF(copy))
mymalloc((int)ramfile->len + 1, "ramdisk load");
if (!copy) {
DBG("no memory for loading ramdisk copy, %s", filename);
return (0);
}
memcpy(copy, (unsigned char*)ramfile->data, (int)ramfile->len);
*(copy + (int)ramfile->len) = 0;
return (copy);
#ifdef USE_ZLIB
int32_t err;
out = mymalloc(ramfile->orig_len, "RAMDISK scratchpad");
if (!out) {
ERR("no memory for ramdisk, %s", filename);
}
outlenl = ramfile->orig_len;
err = uncompress(out, &outlenl,
(unsigned char *)ramfile->data,
ramfile->len);
if (err) {
ERR("file failed to decompress from ramdisk, %s, "
"orig len %d, compressed len %d, err %d",
filename, ramfile->orig_len, ramfile->len, err);
}
if (outlen) {
*outlen = (int)outlenl;
}
#endif
#ifdef USE_MINIZ
int32_t err;
out = (TYPEOF(out)) mymalloc(ramfile->orig_len, "RAMDISK scratchpad");
if (!out) {
ERR("no memory for ramdisk, %s", filename);
}
outlenl = ramfile->orig_len;
err = mz_uncompress(out, &outlenl,
(unsigned char *)ramfile->data,
ramfile->len);
if (err) {
ERR("file failed to decompress from ramdisk, %s, err %d",
filename, err);
}
if (outlen) {
*outlen = (int32_t)outlenl;
}
#endif
#ifdef USE_STB_IMAGE
out = (TYPEOF(out))
stbi_zlib_decode_malloc((const char *)ramfile->data,
ramfile->len, &outlenl);
if (!out) {
ERR("file failed to decompress from ramdisk, %s", filename);
}
if (outlen) {
*outlen = (int)outlenl;
}
#endif
return (out);
}
/*
* Fallback to the disk.
*/
out = file_read_if_exists(filename, outlen);
if (out) {
DBG("Locdisk %s", filename);
if (alt_filename) {
myfree(alt_filename);
}
return (out);
}
out = file_read_if_exists(alt_filename, outlen);
if (out) {
DBG("Locdisk %s", filename);
if (alt_filename) {
myfree(alt_filename);
}
return (out);
}
if (alt_filename) {
myfree(alt_filename);
}
alt_filename = mybasename(filename, "strip dir");
out = file_read_if_exists(alt_filename, outlen);
if (out) {
DBG("Locdisk %s", alt_filename);
if (alt_filename) {
myfree(alt_filename);
}
return (out);
}
/*
* Fail. Caller should whinge.
*
char *popup_str = dynprintf("Filename was not found on ramdisk or "
"on the local disk, %s", filename);
MSG_BOX("%s", popup_str);
myfree(popup_str);
*/
LOG("File not found \"%s\"", filename);
if (alt_filename) {
myfree(alt_filename);
}
return (0);
}
