Improve NOMORE, NOLESS, and LIMIT macros
This commit is contained in:
parent
40d7e12827
commit
06fd4d7b28
@ -91,10 +91,50 @@
|
||||
#define SIGN(a) ((a>0)-(a<0))
|
||||
#define IS_POWER_OF_2(x) ((x) && !((x) & ((x) - 1)))
|
||||
|
||||
// Macros to contrain values
|
||||
#define NOLESS(v,n) do{ if (v < n) v = n; }while(0)
|
||||
#define NOMORE(v,n) do{ if (v > n) v = n; }while(0)
|
||||
#define LIMIT(v,n1,n2) do{ if (v < n1) v = n1; else if (v > n2) v = n2; }while(0)
|
||||
// Macros to constrain values
|
||||
// Avoid double evaluation of arguments to NOMORE/NOLESS/LIMIT
|
||||
#undef NOMORE
|
||||
#undef NOLESS
|
||||
#undef LIMIT
|
||||
#ifdef __cplusplus
|
||||
|
||||
// C++11 solution that is standards compliant.
|
||||
template <class V, class N> static inline constexpr void NOLESS(V& v, const N n) {
|
||||
if (v < n) v = n;
|
||||
}
|
||||
template <class V, class N> static inline constexpr void NOMORE(V& v, const N n) {
|
||||
if (v > n) v = n;
|
||||
}
|
||||
template <class V, class N1, class N2> static inline constexpr void LIMIT(V& v, const N1 n1, const N2 n2) {
|
||||
if (v < n1) v = n1;
|
||||
else if (v > n2) v = n2;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
// Using GCC extensions, but Travis GCC version does not like it and gives
|
||||
// "error: statement-expressions are not allowed outside functions nor in template-argument lists"
|
||||
#define NOLESS(v, n) \
|
||||
do { \
|
||||
__typeof__(n) _n = (n); \
|
||||
if (v < _n) v = _n; \
|
||||
} while(0)
|
||||
|
||||
#define NOMORE(v, n) \
|
||||
do { \
|
||||
__typeof__(n) _n = (n); \
|
||||
if (v > _n) v = _n; \
|
||||
} while(0)
|
||||
|
||||
#define LIMIT(v, n1, n2) \
|
||||
do { \
|
||||
__typeof__(n1) _n1 = (n1); \
|
||||
__typeof__(n2) _n2 = (n2); \
|
||||
if (v < _n1) v = _n1; \
|
||||
else if (v > _n2) v = _n2; \
|
||||
} while(0)
|
||||
|
||||
#endif
|
||||
|
||||
// Macros to support option testing
|
||||
#define _CAT(a, ...) a ## __VA_ARGS__
|
||||
|
Loading…
Reference in New Issue
Block a user