/* FS: Q2 needs it badly -- See http://www.delorie.com/djgpp/doc/libc/libc_380.html for more information
ATTENTION FORKERS
DO NOT REMOVE THE SLEEP OR WARNING!
THIS IS SERIOUS, NO LFN AND SOME SKIN NAMES GET TRUNCATED
WEIRD SHIT HAPPENS
DON'T SEND ME BUG REPORTS FROM A SESSION WITH NO LFN DRIVER LOADED!
*/
static void Sys_DetectLFN (void)
{
if(skiplfncheck)
return;
if(!(_get_volume_info(NULL, 0, 0, NULL) & _FILESYS_LFN_SUPPORTED))
{
printf("WARNING: Long file name support not detected! Grab a copy of DOSLFN!\n");
sleep(2);
printf("Continuing to load Quake II. . .\n");
}
}
/* get bitmap of valid drives */
unsigned long ossgetdisks(void)
{
unsigned long mask;
unsigned long ret;
int drive;
/* iterate over drives A: to Z: and test each one for validity */
for (drive = 'A', mask = 1, ret = 0 ; drive <= 'Z' ; ++drive, mask <<= 1)
{
char dname[3];
/* build a filename string for the drive, like "X:" */
dname[0] = drive;
dname[1] = ':';
dname[2] = '\0';
{
# ifdef DJGPP
int max_file_len;
int max_path_len;
char fstype[64];
/*
* check the file system type on the drive to see if the drive
* is valid
*/
if ((_get_volume_info(dname, &max_file_len, &max_path_len,
fstype) & _FILESYS_UNKNOWN) == 0)
{
/*
* it's not unknown, so it must be valid - include it in
* the result vector
*/
ret |= mask;
}
# else /* DJGPP */
char fcb[44];
/*
* Ask DOS to parse the drive letter filename (via int 0x21,
* function 0x290E). DOS will give us an error indication if
* the drive is invalid.
*/
asm {
push ds
push es
push bp
push si
push di
mov si, ss
mov ds, si
push ds
pop es
lea si, dname
lea di, fcb
mov ax, 0x290E // parse filename
int 0x21
cmp al, 0xFF
je bad_drive
}
/* if we got this far, the drive is good */
ret |= mask;
bad_drive:
asm {
pop di
pop si
pop bp
pop es
pop ds
}
# endif
}
}
return ret;
}