P99_0 P99_0U P99_1 P99_1U P99_2 P99_2COMPLEMENT P99_2U P99_3 P99_3U P99_ABS P99_AVAL P99_BUILTIN_TYPE P99_BUILTIN_TYPE P99_BUILTIN_TYPE P99_BUILTIN_TYPE P99_BUILTIN_TYPE P99_BUILTIN_TYPE P99_C P99_CHOOSE5 P99_E_2COMPLEMENT P99_E_REPRESENTATION P99_EMAX P99_EMIN P99_EPADDING P99_EPREC P99_EWIDTH P99_EWIDTH P99_HIGH2 P99_HIGH2_1 P99_HMASK P99_INIT P99_ISSIGNED P99_LVAL P99_M1 P99_M1U P99_PRI P99_PROMOTE_0 P99_PROMOTE_0U P99_PROMOTE_1 P99_PROMOTE_1U P99_PROMOTE_2 P99_PROMOTE_2U P99_PROMOTE_3 P99_PROMOTE_M1 P99_PROMOTE_M1U P99_RVAL P99_SE_MAX P99_SIGN_PROMOTE P99_SIGNED p99_signed_representation P99_SIGNED_REPRESENTATION P99_TMAX P99_TMAX P99_TMIN P99_TMIN P99_TO_UNSIGN P99_TO_UNSIGNED P99_TPADDING P99_TPREC P99_TWIDTH p99_twos p99_twosc p99_twosh p99_twoshh p99_twosl p99_twosll P99_UE_MAX P99_UE_MAX1 P99_UT_MAX P99_UT_MAX1 P99X_ABS p99x_int128 p99x_intmax p99x_uint128 p99x_uintmax PTRDIFF_C SIZE_C WCHAR_C WINT_C

P99_ISSIGNED #define P99_ISSIGNED (   T )    (P99_M1(T) < P99_1(T)) Determine if T is an unsigned or signed integral type. This works as follows: If T is signed then -1 in that type is always less than 0 in that type If T is unsigned then conversion of -1 to that type gives the maximally encodable value for that type. This is always greater than 0 in that type, If T is _Bool or equivalent, -1 converted to it results in 1 and 0 is also mapped to 0. Thus it is detected as unsigned. See also P99_SIGNED for a similar macro that takes an expression as an argument Remarks argument 0 should correspond to a type that is not a VLA. Definition at line 423 of file p99_int.h.