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Merge pull request #25134 from medhefgo/macro

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macro: Small IN_SET improvements
This commit is contained in:
Luca Boccassi
2022-10-31 21:03:39 +01:00
committed by GitHub
parent 768b86b84a dec283e0a9
commit c2fa46b6b9
2 changed files with 35 additions and 28 deletions
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53
src/fundamental/macro-fundamental.h
View File

@@ -251,47 +251,44 @@
(UNIQ_T(X, xq) / UNIQ_T(Y, yq) + !!(UNIQ_T(X, xq) % UNIQ_T(Y, yq))); \
})
#define CASE_F(X) case X:
#define CASE_F_1(CASE, X) CASE_F(X)
#define CASE_F_2(CASE, X, ...) CASE(X) CASE_F_1(CASE, __VA_ARGS__)
#define CASE_F_3(CASE, X, ...) CASE(X) CASE_F_2(CASE, __VA_ARGS__)
#define CASE_F_4(CASE, X, ...) CASE(X) CASE_F_3(CASE, __VA_ARGS__)
#define CASE_F_5(CASE, X, ...) CASE(X) CASE_F_4(CASE, __VA_ARGS__)
#define CASE_F_6(CASE, X, ...) CASE(X) CASE_F_5(CASE, __VA_ARGS__)
#define CASE_F_7(CASE, X, ...) CASE(X) CASE_F_6(CASE, __VA_ARGS__)
#define CASE_F_8(CASE, X, ...) CASE(X) CASE_F_7(CASE, __VA_ARGS__)
#define CASE_F_9(CASE, X, ...) CASE(X) CASE_F_8(CASE, __VA_ARGS__)
#define CASE_F_10(CASE, X, ...) CASE(X) CASE_F_9(CASE, __VA_ARGS__)
#define CASE_F_11(CASE, X, ...) CASE(X) CASE_F_10(CASE, __VA_ARGS__)
#define CASE_F_12(CASE, X, ...) CASE(X) CASE_F_11(CASE, __VA_ARGS__)
#define CASE_F_13(CASE, X, ...) CASE(X) CASE_F_12(CASE, __VA_ARGS__)
#define CASE_F_14(CASE, X, ...) CASE(X) CASE_F_13(CASE, __VA_ARGS__)
#define CASE_F_15(CASE, X, ...) CASE(X) CASE_F_14(CASE, __VA_ARGS__)
#define CASE_F_16(CASE, X, ...) CASE(X) CASE_F_15(CASE, __VA_ARGS__)
#define CASE_F_17(CASE, X, ...) CASE(X) CASE_F_16(CASE, __VA_ARGS__)
#define CASE_F_18(CASE, X, ...) CASE(X) CASE_F_17(CASE, __VA_ARGS__)
#define CASE_F_19(CASE, X, ...) CASE(X) CASE_F_18(CASE, __VA_ARGS__)
#define CASE_F_20(CASE, X, ...) CASE(X) CASE_F_19(CASE, __VA_ARGS__)
#define CASE_F_1(X) case X:
#define CASE_F_2(X, ...) case X: CASE_F_1( __VA_ARGS__)
#define CASE_F_3(X, ...) case X: CASE_F_2( __VA_ARGS__)
#define CASE_F_4(X, ...) case X: CASE_F_3( __VA_ARGS__)
#define CASE_F_5(X, ...) case X: CASE_F_4( __VA_ARGS__)
#define CASE_F_6(X, ...) case X: CASE_F_5( __VA_ARGS__)
#define CASE_F_7(X, ...) case X: CASE_F_6( __VA_ARGS__)
#define CASE_F_8(X, ...) case X: CASE_F_7( __VA_ARGS__)
#define CASE_F_9(X, ...) case X: CASE_F_8( __VA_ARGS__)
#define CASE_F_10(X, ...) case X: CASE_F_9( __VA_ARGS__)
#define CASE_F_11(X, ...) case X: CASE_F_10( __VA_ARGS__)
#define CASE_F_12(X, ...) case X: CASE_F_11( __VA_ARGS__)
#define CASE_F_13(X, ...) case X: CASE_F_12( __VA_ARGS__)
#define CASE_F_14(X, ...) case X: CASE_F_13( __VA_ARGS__)
#define CASE_F_15(X, ...) case X: CASE_F_14( __VA_ARGS__)
#define CASE_F_16(X, ...) case X: CASE_F_15( __VA_ARGS__)
#define CASE_F_17(X, ...) case X: CASE_F_16( __VA_ARGS__)
#define CASE_F_18(X, ...) case X: CASE_F_17( __VA_ARGS__)
#define CASE_F_19(X, ...) case X: CASE_F_18( __VA_ARGS__)
#define CASE_F_20(X, ...) case X: CASE_F_19( __VA_ARGS__)
#define GET_CASE_F(_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,_11,_12,_13,_14,_15,_16,_17,_18,_19,_20,NAME,...) NAME
#define FOR_EACH_MAKE_CASE(...) \
GET_CASE_F(__VA_ARGS__,CASE_F_20,CASE_F_19,CASE_F_18,CASE_F_17,CASE_F_16,CASE_F_15,CASE_F_14,CASE_F_13,CASE_F_12,CASE_F_11, \
CASE_F_10,CASE_F_9,CASE_F_8,CASE_F_7,CASE_F_6,CASE_F_5,CASE_F_4,CASE_F_3,CASE_F_2,CASE_F_1) \
(CASE_F,__VA_ARGS__)
(__VA_ARGS__)
#define IN_SET(x, ...) \
({ \
bool _found = false; \
/* If the build breaks in the line below, you need to extend the case macros. (We use "long double" as \
* type for the array, in the hope that checkers such as ubsan don't complain that the initializers for \
* the array are not representable by the base type. Ideally we'd use typeof(x) as base type, but that \
* doesn't work, as we want to use this on bitfields and gcc refuses typeof() on bitfields.) */ \
static const long double __assert_in_set[] _unused_ = { __VA_ARGS__ }; \
/* If the build breaks in the line below, you need to extend the case macros. We use typeof(+x) \
* here to widen the type of x if it is a bit-field as this would otherwise be illegal. */ \
static const typeof(+x) __assert_in_set[] _unused_ = { __VA_ARGS__ }; \
assert_cc(ELEMENTSOF(__assert_in_set) <= 20); \
switch (x) { \
FOR_EACH_MAKE_CASE(__VA_ARGS__) \
_found = true; \
break; \
break; \
default: \
break; \
} \

10
src/test/test-macro.c
View File

@@ -209,6 +209,16 @@ TEST(in_set) {
assert_se(IN_SET(4, 1, 2, 3, 4));
assert_se(!IN_SET(0, 1));
assert_se(!IN_SET(0, 1, 2, 3, 4));
struct {
unsigned x:3;
} t = { 1 };
assert_se(IN_SET(t.x, 1));
assert_se(IN_SET(t.x, 1, 2, 3, 4));
assert_se(IN_SET(t.x, 2, 3, 4, 1));
assert_se(!IN_SET(t.x, 0));
assert_se(!IN_SET(t.x, 2, 3, 4));
}
TEST(foreach_pointer) {