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cpython/RISCOS/unixstuff.c at 2.7 · python-emscripten/cpython · GitHub
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74 lines (61 loc) · 1.73 KB
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cpython
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RISCOS
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unixstuff.c
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/* Fudge unix isatty and fileno for RISCOS */
#include
"unixstuff.h"
#include
<math.h>
#include
<time.h>
#include
"oslib/osfile.h"
int
fileno
(
FILE
*
f
)
{
return
(
int
)
f
;
}
int
isatty
(
int
fn
)
{
return
(
fn
==
fileno
(
stdin
));
}
bits
unixtime
(
bits
ld
,
bits
ex
)
{
ld
&=
0xFF
;
ld
-=
51
;
if
(
ex
<
1855547904U
)
ld
--
;
ex
-=
1855548004U
;
return
ex
/
100
+
42949673U
*
ld
-
ld
/
25
;
}
/* from RISC OS infozip, preserves filetype in ld */
int
acorntime
(
bits
*
ex
,
bits
*
ld
,
time_t
utime
)
{
unsigned
timlo
;
/* 3 lower bytes of acorn file-time plus carry byte */
unsigned
timhi
;
/* 2 high bytes of acorn file-time */
timlo
=
((
unsigned
)
utime
&
0x00ffffffU
)
*
100
+
0x00996a00U
;
timhi
=
((
unsigned
)
utime
>>
24
);
timhi
=
timhi
*
100
+
0x0000336eU
+
(
timlo
>>
24
);
if
(
timhi
&
0xffff0000U
)
return
1
;
/* calculation overflow, do not change time */
/* insert the five time bytes into loadaddr and execaddr variables */
*
ex
=
(
timlo
&
0x00ffffffU
) | ((
timhi
&
0x000000ffU
) <<
24
);
*
ld
=
(
*
ld
&
0xffffff00U
) | ((
timhi
>>
8
)
&
0x000000ffU
);
return
0
;
/* subject to future extension to signal overflow */
}
int
isdir
(
char
*
fn
)
{
int
ob
;
if
(
xosfile_read_stamped_no_path
(
fn
,
&
ob
,
0
,
0
,
0
,
0
,
0
))
return
0
;
switch
(
ob
)
{
case
osfile_IS_DIR
:
return
1
;
case
osfile_IS_IMAGE
:
return
1
;
}
return
0
;
}
int
isfile
(
char
*
fn
)
{
int
ob
;
if
(
xosfile_read_stamped_no_path
(
fn
,
&
ob
,
0
,
0
,
0
,
0
,
0
))
return
0
;
switch
(
ob
)
{
case
osfile_IS_FILE
:
return
1
;
case
osfile_IS_IMAGE
:
return
1
;
}
return
0
;
}
int
object_exists
(
char
*
fn
)
{
int
ob
;
if
(
xosfile_read_stamped_no_path
(
fn
,
&
ob
,
0
,
0
,
0
,
0
,
0
))
return
0
;
switch
(
ob
)
{
case
osfile_IS_FILE
:
return
1
;
case
osfile_IS_DIR
:
return
1
;
case
osfile_IS_IMAGE
:
return
1
;
}
return
0
;
}
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