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Libraries
asn1c
Commits
c51e7d67
Commit
c51e7d67
authored
Sep 27, 2004
by
Lev Walkin
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Plain Diff
infinity handling
parent
2a789d9e
Changes
2
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Showing
2 changed files
with
39 additions
and
49 deletions
+39
-49
skeletons/REAL.c
skeletons/REAL.c
+35
-47
skeletons/tests/check-REAL.c
skeletons/tests/check-REAL.c
+4
-2
No files found.
skeletons/REAL.c
View file @
c51e7d67
...
...
@@ -12,13 +12,9 @@
#undef INT_MAX
#define INT_MAX ((int)(((unsigned int)-1) >> 1))
#ifndef INFINITY
#define INFINITY HUGE_VAL
#endif
#ifndef NAN
static
const
double
real_
nan0
;
#define NAN (real_
nan0/real_nan0
)
static
const
double
real_
zero
;
#define NAN (real_
zero/real_zero
)
#endif
/*
...
...
@@ -52,33 +48,16 @@ REAL__dump(double d, int canonical, asn_app_consume_bytes_f *cb, void *app_key)
ssize_t
buflen
=
sizeof
(
local_buf
);
const
char
*
fmt
=
canonical
?
"%.15E"
:
"%.15f"
;
ssize_t
ret
;
int
expval
;
/*
* Check whether it is a special value.
*/
/*
* ilogb(+-0) returns -INT_MAX or INT_MIN (platform-dependent)
* ilogb(+-inf) returns INT_MAX
* ilogb(NaN) returns INT_MIN or INT_MAX (platform-dependent)
*/
expval
=
ilogb
(
d
);
if
(
expval
<=
-
INT_MAX
/* Also catches +-0 and maybe isnan() */
||
expval
==
INT_MAX
/* catches isfin() and maybe isnan() */
)
{
/* fpclassify(3) is not portable yet */
if
(
isnan
(
d
))
{
buf
=
"<NOT-A-NUMBER/>"
;
buflen
=
15
;
}
else
if
(
expval
<=
-
INT_MAX
)
{
if
(
copysign
(
1
.
0
,
d
)
<
0
.
0
)
{
buf
=
"-0"
;
buflen
=
2
;
}
else
{
buf
=
"0"
;
buflen
=
1
;
}
}
else
{
/* isinf() */
return
(
cb
(
buf
,
buflen
,
app_key
)
<
0
)
?
-
1
:
buflen
;
}
else
if
(
isinf
(
d
))
{
if
(
copysign
(
1
.
0
,
d
)
<
0
.
0
)
{
buf
=
"<MINUS-INFINITY/>"
;
buflen
=
17
;
...
...
@@ -86,6 +65,14 @@ REAL__dump(double d, int canonical, asn_app_consume_bytes_f *cb, void *app_key)
buf
=
"<PLUS-INFINITY/>"
;
buflen
=
16
;
}
return
(
cb
(
buf
,
buflen
,
app_key
)
<
0
)
?
-
1
:
buflen
;
}
else
if
(
ilogb
(
d
)
<=
-
INT_MAX
)
{
if
(
copysign
(
1
.
0
,
d
)
<
0
.
0
)
{
buf
=
"-0"
;
buflen
=
2
;
}
else
{
buf
=
"0"
;
buflen
=
1
;
}
return
(
cb
(
buf
,
buflen
,
app_key
)
<
0
)
?
-
1
:
buflen
;
}
...
...
@@ -259,10 +246,10 @@ asn1_REAL2double(const REAL_t *st, double *dbl_value) {
switch
(
st
->
buf
[
0
])
{
case
0x40
:
/* 01000000: PLUS-INFINITY */
*
dbl_value
=
INFINITY
;
*
dbl_value
=
1
.
0
/
real_zero
;
return
0
;
case
0x41
:
/* 01000001: MINUS-INFINITY */
*
dbl_value
=
-
INFINITY
;
*
dbl_value
=
-
1
.
0
/
real_zero
;
return
0
;
/*
* The following cases are defined by
...
...
@@ -429,23 +416,24 @@ asn1_double2REAL(REAL_t *st, double dbl_value) {
st
->
buf
[
0
]
=
0x42
;
/* NaN */
st
->
buf
[
1
]
=
0
;
st
->
size
=
1
;
}
else
if
(
expval
<=
-
INT_MAX
)
{
}
else
if
(
isinf
(
dbl_value
))
{
if
(
copysign
(
1
.
0
,
dbl_value
)
<
0
.
0
)
{
st
->
buf
[
0
]
=
0x41
;
/* MINUS-INFINITY */
}
else
{
st
->
buf
[
0
]
=
0x40
;
/* PLUS-INFINITY */
}
st
->
buf
[
1
]
=
0
;
st
->
size
=
1
;
}
else
{
if
(
copysign
(
1
.
0
,
dbl_value
)
<
0
.
0
)
{
st
->
buf
[
0
]
=
0x80
|
0x40
;
st
->
buf
[
1
]
=
0
;
st
->
size
=
2
;
}
else
{
/* no content octets: positive zero */
st
->
buf
[
0
]
=
0
;
/* JIC */
st
->
size
=
0
;
}
}
else
{
/* isinf() */
if
(
copysign
(
1
.
0
,
dbl_value
)
<
0
.
0
)
{
st
->
buf
[
0
]
=
0x41
;
/* MINUS-INFINITY */
}
else
{
st
->
buf
[
0
]
=
0x40
;
/* PLUS-INFINITY */
}
st
->
buf
[
1
]
=
0
;
st
->
size
=
1
;
}
return
0
;
}
...
...
skeletons/tests/check-REAL.c
View file @
c51e7d67
...
...
@@ -143,13 +143,15 @@ check_buf(uint8_t *buf, size_t bufsize, double verify, const char *sample, const
int
main
()
{
REAL_t
rn
;
static
const
double
c_NaN
=
0
.
0
;
static
const
double
zero
=
0
.
0
;
memset
(
&
rn
,
0
,
sizeof
(
rn
));
check
(
&
rn
,
c_NaN
/
c_NaN
,
"<NOT-A-NUMBER/>"
,
"<NOT-A-NUMBER/>"
);
check
(
&
rn
,
0
.
0
,
"0"
,
"0"
);
check
(
&
rn
,
-
0
.
0
,
"-0"
,
"-0"
);
/* minus-zero */
check
(
&
rn
,
zero
/
zero
,
"<NOT-A-NUMBER/>"
,
"<NOT-A-NUMBER/>"
);
check
(
&
rn
,
1
.
0
/
zero
,
"<PLUS-INFINITY/>"
,
"<PLUS-INFINITY/>"
);
check
(
&
rn
,
-
1
.
0
/
zero
,
"<MINUS-INFINITY/>"
,
"<MINUS-INFINITY/>"
);
check
(
&
rn
,
1
.
0
,
"1.0"
,
"1.0E0"
);
check
(
&
rn
,
-
1
.
0
,
"-1.0"
,
"-1.0E0"
);
check
(
&
rn
,
1
.
5
,
"1.5"
,
"1.5E0"
);
...
...
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