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added a few useful macros

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hyunghwan.chung 2017-02-13 13:40:35 +00:00
parent 73231a29d7
commit d7cb283e44
2 changed files with 10 additions and 3 deletions
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9
moo/lib/moo-cmn.h
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@ -628,6 +628,15 @@ typedef struct moo_t moo_t;
#define MOO_TYPE_MIN(type) \ #define MOO_TYPE_MIN(type) \
((MOO_TYPE_IS_SIGNED(type)? MOO_TYPE_SIGNED_MIN(type): MOO_TYPE_UNSIGNED_MIN(type))) ((MOO_TYPE_IS_SIGNED(type)? MOO_TYPE_SIGNED_MIN(type): MOO_TYPE_UNSIGNED_MIN(type)))
/* round up a positive integer x to the nearst multiple of y */
#define MOO_ALIGN(x,y) ((((x) + (y) - 1) / (y)) * (y))
/* round up a positive integer x to the nearst multiple of y where
* y must be a multiple of a power of 2*/
#define MOO_ALIGN_POW2(x,y) ((((x) + (y) - 1)) & ~((y) - 1))
#define MOO_IS_UNALIGNED_POW2(x,y) ((x) & ((y) - 1))
#define MOO_IS_ALIGNED_POW2(x,y) (!MOO_IS_UNALIGNED_POW2(x,y))
/* ========================================================================= /* =========================================================================
* COMPILER FEATURE TEST MACROS * COMPILER FEATURE TEST MACROS

4
moo/lib/moo-prv.h
View File

@ -102,8 +102,6 @@
# define MOO_MEMCMP(dst,src,size) memcmp(dst,src,size) # define MOO_MEMCMP(dst,src,size) memcmp(dst,src,size)
#endif #endif
#define MOO_ALIGN(x,y) ((((x) + (y) - 1) / (y)) * (y))
/* ========================================================================= */ /* ========================================================================= */
/* CLASS SPEC ENCODING */ /* CLASS SPEC ENCODING */
@ -113,7 +111,7 @@
* The spec field of a class object encodes the number of the fixed part * The spec field of a class object encodes the number of the fixed part
* and the type of the indexed part. The fixed part is the number of * and the type of the indexed part. The fixed part is the number of
* named instance variables. If the spec of a class is indexed, the object * named instance variables. If the spec of a class is indexed, the object
* of the class can be i nstantiated with the size of the indexed part. * of the class can be instantiated with the size of the indexed part.
* *
* For example, on a platform where sizeof(moo_oow_t) is 4, * For example, on a platform where sizeof(moo_oow_t) is 4,
* the layout of the spec field of a class as an OOP value looks like this: * the layout of the spec field of a class as an OOP value looks like this: