char * _add_str(char * a, char * b, unsigned long p, unsigned long q) {
unsigned long len = _maxval(p,q)+1;
char * m = malloc(len);
int carry=0;
unsigned long ai,bi,t;
memset(m,0,len);
bi = q-1;
ai = p-1;
for( t=len-1;t!=0;--t) {
if( ai != -1 && bi != -1 ) {
m[t] = _ctoi(a[ai--]) + _ctoi(b[bi--]) + carry;
} else if( ai != -1 ) {
m[t] = _ctoi(a[ai--]) + carry;
} else if( bi != -1 ) {
m[t] = _ctoi(b[bi--]) + carry;
} else {
break;
}
if( m[t] >= 10 ) {
carry = m[t]/10;
m[t] -= 10;
} else {
carry = 0;
}
}
if( carry > 0 ) {
m[0] = carry;
}
return _to_ascii(m, len);
}
BOOL
UfsFile::setRoot(TCHAR *drive)
{
char name[MAX_PATH];
int unit;
_to_ascii(name, drive, MAX_PATH);
if ('1' <= name[0] && name[0] <= '9' && name[1] == ':')
unit = name[0] - '0';
else
unit = 1;
winblkopen(_f, "DSK", unit, 0);
return TRUE;
}
char * _mul_str(char * a, char * b, unsigned long p, unsigned long q) {
unsigned long len = p+q;
char * m = malloc(len);
int carry=0;
unsigned long ai,bi;
memset(m,0,len);
for( bi = q-1; bi != -1; --bi ) {
for( ai = p-1; ai != -1; --ai ) {
m[ai + bi+1] += carry + _ctoi(a[ai]) * _ctoi(b[bi]);
carry = m[ai + bi+1] / 10;
m[ai + bi+1] %= 10;
}
m[bi] += carry;
carry=0;
}
return _to_ascii(m, len);
}
BOOL
UfsFile::open(const TCHAR *name, uint32_t flags)
{
int error;
if (!_to_ascii(_ascii_filename, name, MAX_PATH))
return FALSE;
error = ufs_open(_ascii_filename, _f);
DPRINTF((TEXT("open file \"%s\" "), name));
if (!error)
DPRINTF((TEXT("(%d byte).\n"), size()));
else
DPRINTF((TEXT("failed.\n")));
return !error;
}
BOOL
UfsFile::setRoot(TCHAR *drive)
{
char name[MAX_PATH];
char devname[4] = "DSK";
int unit = 1;
_to_ascii(name, drive, MAX_PATH);
if ('1' <= name[0] && name[0] <= '9' && name[1] == ':')
unit = name[0] - '0';
else if (isalpha((unsigned char)name[0]) &&
isalpha((unsigned char)name[1]) &&
isalpha((unsigned char)name[2]) &&
'1' <= name[3] && name[3] <= '9' && name[4] == ':') {
devname[0] = name[0];
devname[1] = name[1];
devname[2] = name[2];
unit = name[3] - '0';
}
winblkopen(_f, devname, unit, 0);
return TRUE;
}
