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ruanhaishen
redis
Commits
76864d56
Commit
76864d56
authored
Aug 26, 2010
by
Pieter Noordhuis
Browse files
Expand macro's to functions for readability
parent
cb72d0f1
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/intset.c
View file @
76864d56
...
...
@@ -10,21 +10,38 @@
#define INTSET_ENC_INT32 (sizeof(int32_t))
#define INTSET_ENC_INT64 (sizeof(int64_t))
/* Accessors for each type of encoding */
#define INTSET_VALUE_ENCODING(__val) (((__val) < INT32_MIN || (__val) > INT32_MAX) ? \
INTSET_ENC_INT64 : (((__val) < INT16_MIN || (__val) > INT16_MAX) ? \
INTSET_ENC_INT32 : INTSET_ENC_INT16))
#define INTSET_GET_ENCODED(__is,__pos,__enc) ((__enc == INTSET_ENC_INT64) ? \
((int64_t*)(__is)->contents)[__pos] : ((__enc == INTSET_ENC_INT32) ? \
((int32_t*)(__is)->contents)[__pos] : ((int16_t*)(__is)->contents)[__pos]))
#define INTSET_GET(__is,__pos) (INTSET_GET_ENCODED(__is,__pos,(__is)->encoding))
#define INTSET_SET(__is,__pos,__val) { \
if ((__is)->encoding == INTSET_ENC_INT64) \
((int64_t*)(__is)->contents)[__pos] = (__val); \
else if ((__is)->encoding == INTSET_ENC_INT32) \
((int32_t*)(__is)->contents)[__pos] = (__val); \
else \
((int16_t*)(__is)->contents)[__pos] = (__val); }
/* Return the required encoding for the provided value. */
static
uint8_t
_intsetValueEncoding
(
int64_t
v
)
{
if
(
v
<
INT32_MIN
||
v
>
INT32_MAX
)
return
INTSET_ENC_INT64
;
else
if
(
v
<
INT16_MIN
||
v
>
INT16_MAX
)
return
INTSET_ENC_INT32
;
return
INTSET_ENC_INT16
;
}
/* Return the value at pos, given an encoding. */
static
int64_t
_intsetGetEncoded
(
intset
*
is
,
int
pos
,
uint8_t
enc
)
{
if
(
enc
==
INTSET_ENC_INT64
)
return
((
int64_t
*
)
is
->
contents
)[
pos
];
else
if
(
enc
==
INTSET_ENC_INT32
)
return
((
int32_t
*
)
is
->
contents
)[
pos
];
return
((
int16_t
*
)
is
->
contents
)[
pos
];
}
/* Return the value at pos, using the configured encoding. */
static
int64_t
_intsetGet
(
intset
*
is
,
int
pos
)
{
return
_intsetGetEncoded
(
is
,
pos
,
is
->
encoding
);
}
/* Set the value at pos, using the configured encoding. */
static
void
_intsetSet
(
intset
*
is
,
int
pos
,
int64_t
value
)
{
if
(
is
->
encoding
==
INTSET_ENC_INT64
)
((
int64_t
*
)
is
->
contents
)[
pos
]
=
value
;
else
if
(
is
->
encoding
==
INTSET_ENC_INT32
)
((
int32_t
*
)
is
->
contents
)[
pos
]
=
value
;
else
((
int16_t
*
)
is
->
contents
)[
pos
]
=
value
;
}
/* Create an empty intset. */
intset
*
intsetNew
(
void
)
{
...
...
@@ -51,7 +68,7 @@ static intset *intsetUpgrade(intset *is, uint8_t newenc, uint8_t extra, uint8_t
/* Upgrade back-to-front so we don't overwrite values */
while
(
length
--
)
INTSET_SET
(
is
,
length
+
offset
,
INTSET_GET_ENCODED
(
is
,
length
,
curenc
));
_intsetSet
(
is
,
length
+
offset
,
_intsetGetEncoded
(
is
,
length
,
curenc
));
return
is
;
}
...
...
@@ -70,10 +87,10 @@ static uint8_t intsetSearch(intset *is, int64_t value, uint32_t *pos) {
}
else
{
/* Check for the case where we know we cannot find the value,
* but do know the insert position. */
if
(
value
>
INTSET_GET
(
is
,
is
->
length
-
1
))
{
if
(
value
>
_intsetGet
(
is
,
is
->
length
-
1
))
{
if
(
pos
)
*
pos
=
is
->
length
;
return
0
;
}
else
if
(
value
<
INTSET_GET
(
is
,
0
))
{
}
else
if
(
value
<
_intsetGet
(
is
,
0
))
{
if
(
pos
)
*
pos
=
0
;
return
0
;
}
...
...
@@ -81,7 +98,7 @@ static uint8_t intsetSearch(intset *is, int64_t value, uint32_t *pos) {
while
(
max
>=
min
)
{
mid
=
(
min
+
max
)
/
2
;
cur
=
INTSET_GET
(
is
,
mid
);
cur
=
_intsetGet
(
is
,
mid
);
if
(
value
>
cur
)
{
min
=
mid
+
1
;
}
else
if
(
value
<
cur
)
{
...
...
@@ -121,7 +138,7 @@ static void intsetMoveTail(intset *is, uint32_t from, uint32_t to) {
/* Insert an integer in the intset */
intset
*
intsetAdd
(
intset
*
is
,
int64_t
value
,
uint8_t
*
success
)
{
uint8_t
valenc
=
INTSET_VALUE_ENCODING
(
value
);
uint8_t
valenc
=
_intsetValueEncoding
(
value
);
uint32_t
pos
,
offset
;
if
(
success
)
*
success
=
1
;
...
...
@@ -145,14 +162,14 @@ intset *intsetAdd(intset *is, int64_t value, uint8_t *success) {
if
(
pos
<
is
->
length
)
intsetMoveTail
(
is
,
pos
,
pos
+
1
);
}
INTSET_SET
(
is
,
pos
,
value
);
_intsetSet
(
is
,
pos
,
value
);
is
->
length
++
;
return
is
;
}
/* Delete integer from intset */
intset
*
intsetRemove
(
intset
*
is
,
int64_t
value
,
uint8_t
*
success
)
{
uint8_t
valenc
=
INTSET_VALUE_ENCODING
(
value
);
uint8_t
valenc
=
_intsetValueEncoding
(
value
);
uint32_t
pos
;
if
(
success
)
*
success
=
0
;
...
...
@@ -170,20 +187,20 @@ intset *intsetRemove(intset *is, int64_t value, uint8_t *success) {
/* Determine whether a value belongs to this set */
uint8_t
intsetFind
(
intset
*
is
,
int64_t
value
)
{
uint8_t
valenc
=
INTSET_VALUE_ENCODING
(
value
);
uint8_t
valenc
=
_intsetValueEncoding
(
value
);
return
valenc
<=
is
->
encoding
&&
intsetSearch
(
is
,
value
,
NULL
);
}
/* Return random member */
int64_t
intsetRandom
(
intset
*
is
)
{
return
INTSET_GET
(
is
,
rand
()
%
is
->
length
);
return
_intsetGet
(
is
,
rand
()
%
is
->
length
);
}
/* Sets the value to the value at the given position. When this position is
* out of range the function returns 0, when in range it returns 1. */
uint8_t
intsetGet
(
intset
*
is
,
uint32_t
pos
,
int64_t
*
value
)
{
if
(
pos
<
is
->
length
)
{
*
value
=
INTSET_GET
(
is
,
pos
);
*
value
=
_intsetGet
(
is
,
pos
);
return
1
;
}
return
0
;
...
...
@@ -200,7 +217,7 @@ uint32_t intsetLen(intset *is) {
void
intsetRepr
(
intset
*
is
)
{
int
i
;
for
(
i
=
0
;
i
<
is
->
length
;
i
++
)
{
printf
(
"%lld
\n
"
,
(
uint64_t
)
INTSET_GET
(
is
,
i
));
printf
(
"%lld
\n
"
,
(
uint64_t
)
_intsetGet
(
is
,
i
));
}
printf
(
"
\n
"
);
}
...
...
@@ -266,16 +283,16 @@ int main(int argc, char **argv) {
sranddev
();
printf
(
"Value encodings: "
);
{
assert
(
INTSET_VALUE_ENCODING
(
-
32768
)
==
INTSET_ENC_INT16
);
assert
(
INTSET_VALUE_ENCODING
(
+
32767
)
==
INTSET_ENC_INT16
);
assert
(
INTSET_VALUE_ENCODING
(
-
32769
)
==
INTSET_ENC_INT32
);
assert
(
INTSET_VALUE_ENCODING
(
+
32768
)
==
INTSET_ENC_INT32
);
assert
(
INTSET_VALUE_ENCODING
(
-
2147483648
)
==
INTSET_ENC_INT32
);
assert
(
INTSET_VALUE_ENCODING
(
+
2147483647
)
==
INTSET_ENC_INT32
);
assert
(
INTSET_VALUE_ENCODING
(
-
2147483649
)
==
INTSET_ENC_INT64
);
assert
(
INTSET_VALUE_ENCODING
(
+
2147483648
)
==
INTSET_ENC_INT64
);
assert
(
INTSET_VALUE_ENCODING
(
-
9223372036854775808ull
)
==
INTSET_ENC_INT64
);
assert
(
INTSET_VALUE_ENCODING
(
+
9223372036854775807ull
)
==
INTSET_ENC_INT64
);
assert
(
_intsetValueEncoding
(
-
32768
)
==
INTSET_ENC_INT16
);
assert
(
_intsetValueEncoding
(
+
32767
)
==
INTSET_ENC_INT16
);
assert
(
_intsetValueEncoding
(
-
32769
)
==
INTSET_ENC_INT32
);
assert
(
_intsetValueEncoding
(
+
32768
)
==
INTSET_ENC_INT32
);
assert
(
_intsetValueEncoding
(
-
2147483648
)
==
INTSET_ENC_INT32
);
assert
(
_intsetValueEncoding
(
+
2147483647
)
==
INTSET_ENC_INT32
);
assert
(
_intsetValueEncoding
(
-
2147483649
)
==
INTSET_ENC_INT64
);
assert
(
_intsetValueEncoding
(
+
2147483648
)
==
INTSET_ENC_INT64
);
assert
(
_intsetValueEncoding
(
-
9223372036854775808ull
)
==
INTSET_ENC_INT64
);
assert
(
_intsetValueEncoding
(
+
9223372036854775807ull
)
==
INTSET_ENC_INT64
);
ok
();
}
...
...
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