#include <float.h> #include <math.h> #include <stdio.h> #include <string.h> int main (void) { #if LDBL_MANT_DIG >= 106 volatile union { long double l; long long x[2]; } u, v; char buf[64]; #endif int result = 0; #if LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 113 # define COMPARE_LDBL(u, v) \ ((u).l == (v).l && (u).x[0] == (v).x[0] && (u).x[1] == (v).x[1]) #else # define COMPARE_LDBL(u, v) ((u).l == (v).l) #endif #define TEST(val) \ do \ { \ u.l = (val); \ snprintf (buf, sizeof buf, "%LaL", u.l); \ if (strcmp (buf, #val) != 0) \ { \ printf ("Error on line %d: %s != %s\n", __LINE__, buf, #val); \ result = 1; \ } \ if (sscanf (#val, "%La", &v.l) != 1 || !COMPARE_LDBL (u, v)) \ { \ printf ("Error sscanf on line %d: %La != %La\n", __LINE__, \ u.l, v.l); \ result = 1; \ } \ /* printf ("%s %La %016Lx %016Lx\n", #val, u.l, u.x[0], u.x[1]); */ \ } \ while (0) #if LDBL_MANT_DIG >= 106 # if LDBL_MANT_DIG == 106 TEST (0x0.ffffffffffffp-1022L); TEST (0x0.ffffffffffff1p-1022L); TEST (0x0.fffffffffffffp-1022L); # endif TEST (0x1p-1022L); TEST (0x1.0000000000001p-1022L); TEST (0x1.00000000001e7p-1022L); TEST (0x1.fffffffffffffp-1022L); TEST (0x1p-1021L); TEST (0x1.00000000000008p-1021L); TEST (0x1.0000000000001p-1021L); TEST (0x1.00000000000018p-1021L); TEST (0x1.0000000000000f8p-1017L); TEST (0x1.0000000000001p-1017L); TEST (0x1.000000000000108p-1017L); TEST (0x1.000000000000dcf8p-1013L); TEST (0x1.000000000000ddp-1013L); TEST (0x1.000000000000dd08p-1013L); TEST (0x1.ffffffffffffffffffffffffffp-1L); TEST (0x1.ffffffffffffffffffffffffff8p-1L); TEST (0x1p+0L); TEST (0x1.000000000000000000000000008p+0L); TEST (0x1.00000000000000000000000001p+0L); TEST (0x1.000000000000000000000000018p+0L); TEST (0x1.23456789abcdef123456789abc8p+0L); TEST (0x1.23456789abcde7123456789abc8p+0L); TEST (0x1.23456789abcdef123456789abc8p+64L); TEST (0x1.23456789abcde7123456789abc8p+64L); TEST (0x1.123456789abcdef123456789p-969L); # if LDBL_MANT_DIG == 106 TEST (-0x1.2d71957cc1263bbbeb1d365f1e8p-969L); TEST (0x1.23456789abcdef0123456789abp-970L); TEST (0x1.579bde02468acp-1001L); TEST (0x0.abcdef0123456p-1022L); TEST (0x1.abcdef0123456p-1022L); TEST (0x1.abcdef012345678p-1014L); TEST (0x1.abcdef0123456f8p-1014L); # endif #endif return result; }