// finds the Tyrian data directory
const char *data_dir( void )
{
const char *dirs[] =
{
custom_data_dir,
TYRIAN_DIR,
"data",
".",
};
static const char *dir = NULL;
if (dir != NULL)
return dir;
for (uint i = 0; i < COUNTOF(dirs); ++i)
{
if (dirs[i] == NULL)
continue;
FILE *f = dir_fopen(dirs[i], "tyrian1.lvl", "rb");
if (f)
{
fclose(f);
dir = dirs[i];
break;
}
}
if (dir == NULL) // data not found
dir = "";
return dir;
}
// check if file can be opened for reading
bool dir_file_exists( const char *dir, const char *file )
{
FILE *f = dir_fopen(dir, file, "rb");
if (f != NULL)
fclose(f);
return (f != NULL);
}
// warn when dir_fopen fails
FILE *dir_fopen_warn( const char *dir, const char *file, const char *mode )
{
FILE *f = dir_fopen(dir, file, mode);
if (f == NULL)
fprintf(stderr, "warning: failed to open '%s': %s\n", file, strerror(errno));
return f;
}
// die when dir_fopen fails
FILE *dir_fopen_die( const char *dir, const char *file, const char *mode )
{
FILE *f = dir_fopen(dir, file, mode);
if (f == NULL)
{
fprintf(stderr, "error: failed to open '%s': %s\n", file, strerror(errno));
fprintf(stderr, "error: One or more of the required Tyrian " TYRIAN_VERSION " data files could not be found.\n"
" Please read the README file.\n");
JE_tyrianHalt(1);
}
return f;
}
// finds the Tyrian data directory
const char *data_dir( void )
{
const char *dirs[] =
{
//custom_data_dir,
"./data",
"./Assets/data",
"/data",
"/Assets/data",
"data",
"Assets/data"
};
static const char *dir = NULL;
if (dir != NULL && (dir[0] != '\0'))
return dir;
for (uint i = 0; i < COUNTOF(dirs); ++i)
{
FILE *f = dir_fopen(dirs[i], "tyrian1.lvl", "rb");
if (f)
{
fclose(f);
dir = dirs[i];
break;
}
}
if (dir == NULL) // data not found
dir = "";
return dir;
}
static int
unpack_image(const char *infn, const char *outdn)
{
struct imagewty_header *header;
FILE *ifp, *lfp, *ofp;
void *image, *curr;
long imagesize;
int i;
ifp = fopen(infn, "rb");
if (ifp == NULL) {
fprintf(stderr, "Error: unable to open %s!\n", infn);
return 2;
}
fseek(ifp, 0, SEEK_END);
imagesize = ftell(ifp);
fseek(ifp, 0, SEEK_SET);
if (imagesize <= 0) {
fprintf(stderr, "Error: Invalid file size %ld (%s)\n",
imagesize, strerror(errno));
return 3;
}
image = malloc(imagesize);
if (!image) {
fprintf(stderr, "Error: Unable to allocate memory for image: %ld\n", imagesize);
return 4;
}
fread(image, imagesize, 1, ifp);
fclose(ifp);
/* Decrypt header (padded to 1024 bytes) */
curr = rc6_decrypt_inplace(image, 1024, &header_ctx);
/* Decrypt file headers */
header = (struct imagewty_header*)image;
curr = rc6_decrypt_inplace(curr, header->num_files * 1024, &fileheaders_ctx);
/* Decrypt file contents */
for (i=0; i < header->num_files; i++) {
struct imagewty_file_header *filehdr;
void *next;
filehdr = (struct imagewty_file_header*)(image + 1024 + (i * 1024));
next = rc6_decrypt_inplace(curr, filehdr->stored_length, &filecontent_ctx);
#if TF_DECRYPT_WORKING
if (!(strlen(filehdr->filename) >= 4 &&
strncmp(filehdr->filename + strlen(filehdr->filename) -4, ".fex", 4) == 0)) {
/* Not a 'FEX' file, so we need to decrypt it even more! */
tf_decrypt_inplace(curr, filehdr->stored_length);
}
#endif
curr = next;
}
if (flag_compat_output == OUTPUT_UNIMG) {
lfp = dir_fopen(outdn, "base.hdr", "wb");
if (lfp) {
uint32_t *hdr = image + IMAGEWTY_MAGIC_LEN;
fprintf(lfp, "%.8s\r\n", header->magic);
for (i = 0; i < (sizeof(*header) - IMAGEWTY_MAGIC_LEN) / sizeof(uint32_t); i++)
fprintf(lfp, "%08X\r\n", hdr[i]);
fclose(lfp);
}
lfp = dir_fopen(outdn, "Filelist.txt", "wb");
} else if (flag_compat_output == OUTPUT_IMGREPACKER) {
lfp = dir_fopen(outdn, "image.cfg", "wb");
if (lfp != NULL) {
char timestr[256];
struct tm *tm;
time_t t;
time(&t);
tm = localtime(&t);
strcpy(timestr, asctime(tm));
/* strip newline */
timestr[strlen(timestr) -1] = '\0';
fputs(";/**************************************************************************/\r\n", lfp);
fprintf(lfp, "; %s\r\n", timestr);
fprintf(lfp, "; generated by %s\r\n", progname);
fprintf(lfp, "; %s\r\n", infn);
fputs(";/**************************************************************************/\r\n", lfp);
fputs("[FILELIST]\r\n", lfp);
}
}
for (i=0; i < header->num_files; i++) {
struct imagewty_file_header *filehdr;
char hdrfname[32], contfname[32];
filehdr = (struct imagewty_file_header*)(image + 1024 + (i * 1024));
if (flag_compat_output == OUTPUT_UNIMG) {
printf("Extracting: %.8s %.16s (%u, %u)\n",
filehdr->maintype, filehdr->subtype,
filehdr->original_length, filehdr->stored_length);
sprintf(hdrfname, "%.8s_%.16s.hdr", filehdr->maintype, filehdr->subtype);
ofp = dir_fopen(outdn, hdrfname, "wb");
if (ofp) {
fwrite(filehdr, filehdr->total_header_size, 1, ofp);
fclose(ofp);
}
sprintf(contfname, "%.8s_%.16s", filehdr->maintype, filehdr->subtype);
ofp = dir_fopen(outdn, contfname, "wb");
if (ofp) {
fwrite(image + filehdr->offset, filehdr->original_length, 1, ofp);
fclose(ofp);
}
fprintf(lfp, "%s\t%s\r\n", hdrfname, contfname);
} else if (flag_compat_output == OUTPUT_IMGREPACKER) {
printf("Extracting %s\n", filehdr->filename);
ofp = dir_fopen(outdn, filehdr->filename, "wb");
if (ofp) {
fwrite(image + filehdr->offset, filehdr->original_length, 1, ofp);
fclose(ofp);
}
fprintf(lfp, "\t{filename = INPUT_DIR .. \"%s\", maintype = \"%.8s\", subtype = \"%.16s\",},\r\n",
filehdr->filename[0] == '/' ? filehdr->filename+1 : filehdr->filename,
filehdr->maintype, filehdr->subtype);
}
}
if (lfp && flag_compat_output == OUTPUT_IMGREPACKER) {
/* Now print the relevant stuff for the image.cfg */
fputs("\r\n[IMAGE_CFG]\r\n", lfp);
fprintf(lfp, "version = 0x%06x\r\n", header->version);
fprintf(lfp, "pid = 0x%08x\r\n", header->pid);
fprintf(lfp, "vid = 0x%08x\r\n", header->vid);
fprintf(lfp, "hardwareid = 0x%03x\r\n", header->hardware_id);
fprintf(lfp, "firmwareid = 0x%03x\r\n", header->firmware_id);
fprintf(lfp, "imagename = %s\r\n", infn);
fputs("filelist = FILELIST\r\n", lfp);
}
if (lfp)
fclose(lfp);
return 0;
}
/* loadAnim opens the file and loads data from it into the header structs.
* It should take care to clean up after itself should an error occur.
*/
int JE_loadAnim( const char *filename )
{
uint32_t i, fileSize;
char temp[4];
Curlpnum = -1;
InFile = dir_fopen(data_dir(), filename, "rb");
if(InFile == NULL)
{
return(-1);
}
fileSize = ftell_eof(InFile);
if(fileSize < ANIM_OFFSET)
{
/* We don't know the exact size our file should be yet,
* but we do know it should be way more than this */
fclose(InFile);
return(-1);
}
/* Read in the header. The header is 256 bytes long or so,
* but that includes a lot of padding as well as several
* vars we really don't care about. We shall check the ID and extract
* the handful of vars we care about. Every value in the header that
* is constant will be ignored.
*/
efread(&temp, 1, 4, InFile); /* The ID, should equal "LPF " */
fseek(InFile, 2, SEEK_CUR); /* skip over this word */
efread(&FileHeader.nlps, 2, 1, InFile); /* Number of pages */
efread(&FileHeader.nRecords, 4, 1, InFile); /* Number of records */
if (memcmp(temp, "LPF ", 4) != 0
|| FileHeader.nlps == 0 || FileHeader.nRecords == 0
|| FileHeader.nlps > 256 || FileHeader.nRecords > 65535)
{
fclose(InFile);
return(-1);
}
/* Read in headers */
fseek(InFile, PAGEHEADER_OFFSET, SEEK_SET);
for (i = 0; i < FileHeader.nlps; i++)
{
efread(&PageHeader[i].baseRecord, 2, 1, InFile);
efread(&PageHeader[i].nRecords, 2, 1, InFile);
efread(&PageHeader[i].nBytes, 2, 1, InFile);
}
/* Now we have enough information to calculate the 'expected' file size.
* Our calculation SHOULD be equal to fileSize, but we won't begrudge
* padding */
if (fileSize < (FileHeader.nlps-1) * ANI_PAGE_SIZE + ANIM_OFFSET
+ PageHeader[FileHeader.nlps-1].nBytes
+ PageHeader[FileHeader.nlps-1].nRecords * 2 + 8)
{
fclose(InFile);
return(-1);
}
/* Now read in the palette. */
fseek(InFile, PALETTE_OFFSET, SEEK_SET);
for (i = 0; i < 256; i++)
{
efread(&colors[i].b, 1, 1, InFile);
efread(&colors[i].g, 1, 1, InFile);
efread(&colors[i].r, 1, 1, InFile);
efread(&colors[i].unused, 1, 1, InFile);
}
set_palette(colors, 0, 255);
/* Whew! That was hard. Let's go grab some beers! */
return(0);
}
U16 MemoryAlloc(U16 size, long count, int stored_at)
{
// Returns handle number if successful, 0 or nullptr if failure
U16 handle = 0;
int use_this_type;
long toallocate;
toallocate = count * size;
if (toallocate <= 0) // we failed, can't allocate > 2,147,483,647
return 0U; // or it wraps around to negative
/* check structure for requested memory type (add em up) to see if
sufficient amount is available to grant request */
use_this_type = check_for_mem(stored_at, toallocate);
if (use_this_type == NOWHERE)
{
DisplayError(stored_at, toallocate);
goodbye();
}
// get next available handle
handle = next_handle();
if (handle >= MAXHANDLES || handle == 0)
{
DisplayHandle(handle);
return 0U;
// Oops, do something about this! ?????
}
// attempt to allocate requested memory type
bool success = false;
switch (use_this_type)
{
default:
case NOWHERE: // MemoryAlloc
use_this_type = NOWHERE; // in case nonsense value is passed
break;
case MEMORY: // MemoryAlloc
// Availability of memory checked in check_for_mem()
handletable[handle].Linearmem.memory = (BYTE *)malloc(toallocate);
handletable[handle].Linearmem.size = toallocate;
handletable[handle].Linearmem.stored_at = MEMORY;
numTOTALhandles++;
success = true;
break;
case DISK: // MemoryAlloc
memfile[9] = (char)(handle % 10 + (int)'0');
memfile[8] = (char)((handle % 100) / 10 + (int)'0');
memfile[7] = (char)((handle % 1000) / 100 + (int)'0');
if (disktarga)
handletable[handle].Disk.file = dir_fopen(workdir, light_name, "a+b");
else
handletable[handle].Disk.file = dir_fopen(tempdir, memfile, "w+b");
rewind(handletable[handle].Disk.file);
if (fseek(handletable[handle].Disk.file, toallocate, SEEK_SET) != 0)
handletable[handle].Disk.file = nullptr;
if (handletable[handle].Disk.file == nullptr)
{
handletable[handle].Disk.stored_at = NOWHERE;
use_this_type = NOWHERE;
WhichDiskError(1);
DisplayMemory();
driver_buzzer(buzzer_codes::PROBLEM);
break;
}
numTOTALhandles++;
success = true;
fclose(handletable[handle].Disk.file); // so clusters aren't lost if we crash while running
if (disktarga)
handletable[handle].Disk.file = dir_fopen(workdir, light_name, "r+b");
else
handletable[handle].Disk.file = dir_fopen(tempdir, memfile, "r+b"); // reopen
rewind(handletable[handle].Disk.file);
handletable[handle].Disk.size = toallocate;
handletable[handle].Disk.stored_at = DISK;
use_this_type = DISK;
break;
} // end of switch
if (stored_at != use_this_type && debugflag == debug_flags::display_memory_statistics)
{
char buf[MSGLEN];
sprintf(buf, "Asked for %s, allocated %lu bytes of %s, handle = %u.",
memstr[stored_at], toallocate, memstr[use_this_type], handle);
stopmsg(STOPMSG_INFO_ONLY | STOPMSG_NO_BUZZER, (char *)buf);
DisplayMemory();
}
if (success)
return (handle);
else // return 0 if failure
return 0U;
}
static int
pack_image(const char *indn, const char *outfn)
{
struct imagewty_header *header;
group_t *head, *filelist;
uint32_t i, num_files;
variable_t *var;
FILE *cfp, *ofp;
void *p;
/* try to open image configuration */
cfp = dir_fopen(indn, "image.cfg", "r");
if (cfp == NULL) {
fprintf(stderr, "Error: unable to open %s/%s!\n", indn, "image.cfg");
return -ENOENT;
}
ofp = fopen(outfn, "wb");
if (ofp == NULL) {
fprintf(stderr, "Error: could not create image file %s!\n", outfn);
fclose(cfp);
return -ENOENT;
}
/* file is there, now try to load it */
head = cfg_load(cfp);
fclose(cfp);
if (head == NULL) {
fprintf(stderr, "Error: failed to parse %s/%s!\n", indn, "image.cfg");
return -EINVAL;
}
/* Got configuration, time to start packing it all up! */
var = cfg_find_var("filelist", head);
if (var == NULL || var->type != VT_STRING) {
fprintf(stderr, "Error: Unable to find filelist string "
"variable in configuration!\n");
cfg_free(head);
return -EINVAL;
}
filelist = cfg_find_group(var->str, head);
if (filelist == NULL) {
fprintf(stderr, "Error: unable to find group %s!\n", var->str);
cfg_free(head);
return -EINVAL;
}
num_files = cfg_count_vars(filelist);
if (!num_files) {
fprintf(stderr, "Error: no files to pack found in configuration!\n");
cfg_free(head);
return -EINVAL;
}
p = malloc(1024 + num_files * 1024);
if (p == NULL) {
fprintf(stderr, "Error: failed to allocate memory for image!\n");
cfg_free(head);
return -ENOMEM;
}
/* Initialize image file header */
memset(p, 0, 1024 + num_files * 1024);
header = p;
memcpy(header->magic, IMAGEWTY_MAGIC, sizeof(header->magic));
header->header_version = 0x0100;
header->header_size = 0x50; /* should be 0x60 for version == 0x0300 */
header->ram_base = 0x04D00000;
header->version = cfg_get_number("version", head);
header->image_size = 0; /* this will be filled in later on */
header->image_header_size = 1024;
header->v1.pid = cfg_get_number("pid", head);
header->v1.vid = cfg_get_number("vid", head);
header->v1.hardware_id = cfg_get_number("hardwareid", head);
header->v1.firmware_id = cfg_get_number("firmwareid", head);
header->v1.val1 = 1;
header->v1.val1024 = 1024;
header->v1.num_files = num_files;
header->v1.num_files = cfg_count_vars(filelist);
header->v1.val1024_2 = 1024;
/* Setup file headers */
{
uint32_t offset = (num_files +1) * 1024;
struct imagewty_file_header *fheaders;
variable_t *var;
fheaders = (struct imagewty_file_header*) (p + 1024);
for(var=filelist->vars; var; var=var->next) {
variable_t *v, *fn = NULL, *mt = NULL, *st = NULL;
uint32_t size;
FILE *fp;
for (v=var->items; v; v=v->next) {
if (v->type != VT_STRING)
continue;
if (strcmp(v->name, "filename") == 0)
fn = v;
else if (strcmp(v->name, "maintype") == 0)
mt = v;
else if (strcmp(v->name, "subtype") == 0)
st = v;
}
if (!fn || !mt || !st) {
fprintf(stderr, "Error: incomplete filelist item!\n");
return -EINVAL;
}
fheaders->filename_len = IMAGEWTY_FHDR_FILENAME_LEN;
fheaders->total_header_size = 1024;
strcpy((char*)fheaders->v1.filename, fn->str);
strcpy((char*)fheaders->maintype, mt->str);
strcpy((char*)fheaders->subtype, st->str);
fp = dir_fopen(indn, fn->str, "rb");
if (fp) {
fseek(fp, 0, SEEK_END);
size = ftell(fp);
fclose(fp);
} else {
fprintf(stderr, "Error: unable to read file '%s'!\n", fn->str);
continue;
}
fheaders->v1.offset = offset;
fheaders->v1.stored_length =
fheaders->v1.original_length = size;
if (fheaders->v1.stored_length & 0x1FF) {
fheaders->v1.stored_length &= ~0x1FF;
fheaders->v1.stored_length += 0x200;
}
offset += fheaders->v1.stored_length;
fheaders = (struct imagewty_file_header*) ((uint8_t*)fheaders + 1024);
}
/* We now know the total size of the file; patch it into the main header */
if (offset & 0xFF)
offset = (offset & 0xFF) + 0x100;
header->image_size = offset;
}
/* Now we have all headers setup in memory, time to write out the image file */
fwrite(p, 1024, num_files +1, ofp);
/* now write the file content too */
for (i = 1; i <= num_files; i++) {
struct imagewty_file_header *h =
(struct imagewty_file_header*)(p + i * 1024);
FILE *fp = dir_fopen(indn, h->v1.filename, "rb");
if (fp != NULL) {
char buf[512];
size_t size = 0;
while(!feof(fp)) {
size_t bytesread = fread(buf, 1, 512, fp);
if (bytesread) {
if (bytesread & 0x1ff)
bytesread = (bytesread & ~0x1ff) + 0x200;
if (flag_encryption_enabled)
rc6_encrypt_inplace(buf, bytesread, &filecontent_ctx);
fwrite(buf, 1, bytesread, ofp);
}
size += bytesread;
}
fclose(fp);
}
}
/* Headers no longer used; encrypt and write if requested */
if (flag_encryption_enabled) {
void *curr = rc6_encrypt_inplace(p, 1024, &header_ctx);
rc6_encrypt_inplace(curr, num_files * 1024, &fileheaders_ctx);
rewind(ofp);
fwrite(p, 1024, num_files +1, ofp);
}
fclose(ofp);
/* Done, free configuration, no longer needed */
cfg_free(head);
return 0;
}