stdio-common/tst-sprintf2.c

   1 #include <float.h>
   2 #include <math.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5
   6 int
   7 main (void)
   8 {
   9 #if LDBL_MANT_DIG >= 106
  10   volatile union { long double l; long long x[2]; } u, v;
  11   char buf[64];
  12 #endif
  13   int result = 0;
  14
  15 #if LDBL_MANT_DIG == 106 || LDBL_MANT_DIG == 113
  16 # define COMPARE_LDBL(u, v) \
  17   ((u).l == (v).l && (u).x[0] == (v).x[0] && (u).x[1] == (v).x[1])
  18 #else
  19 # define COMPARE_LDBL(u, v) ((u).l == (v).l)
  20 #endif
  21
  22 #define TEST(val) \
  23   do                                                                       \
  24     {                                                                      \
  25       u.l = (val);                                                         \
  26       snprintf (buf, sizeof buf, "%LaL", u.l);                             \
  27       if (strcmp (buf, #val) != 0)                                         \
  28         {                                                                  \
  29           printf ("Error on line %d: %s != %s\n", __LINE__, buf, #val);    \
  30           result = 1;                                                      \
  31         }                                                                  \
  32       if (sscanf (#val, "%La", &v.l) != 1 || !COMPARE_LDBL (u, v))         \
  33         {                                                                  \
  34           printf ("Error sscanf on line %d: %La != %La\n", __LINE__,       \
  35                   u.l, v.l);                                               \
  36           result = 1;                                                      \
  37         }                                                                  \
  38       /* printf ("%s %La %016Lx %016Lx\n", #val, u.l, u.x[0], u.x[1]); */  \
  39     }                                                                      \
  40   while (0)
  41
  42 #if LDBL_MANT_DIG >= 106
  43 # if LDBL_MANT_DIG == 106
  44   TEST (0x0.ffffffffffffp-1022L);
  45   TEST (0x0.ffffffffffff1p-1022L);
  46   TEST (0x0.fffffffffffffp-1022L);
  47 # endif
  48   TEST (0x1p-1022L);
  49   TEST (0x1.0000000000001p-1022L);
  50   TEST (0x1.00000000001e7p-1022L);
  51   TEST (0x1.fffffffffffffp-1022L);
  52   TEST (0x1p-1021L);
  53   TEST (0x1.00000000000008p-1021L);
  54   TEST (0x1.0000000000001p-1021L);
  55   TEST (0x1.00000000000018p-1021L);
  56   TEST (0x1.0000000000000f8p-1017L);
  57   TEST (0x1.0000000000001p-1017L);
  58   TEST (0x1.000000000000108p-1017L);
  59   TEST (0x1.000000000000dcf8p-1013L);
  60   TEST (0x1.000000000000ddp-1013L);
  61   TEST (0x1.000000000000dd08p-1013L);
  62   TEST (0x1.ffffffffffffffffffffffffffp-1L);
  63   TEST (0x1.ffffffffffffffffffffffffff8p-1L);
  64   TEST (0x1p+0L);
  65   TEST (0x1.000000000000000000000000008p+0L);
  66   TEST (0x1.00000000000000000000000001p+0L);
  67   TEST (0x1.000000000000000000000000018p+0L);
  68   TEST (0x1.23456789abcdef123456789abc8p+0L);
  69   TEST (0x1.23456789abcde7123456789abc8p+0L);
  70   TEST (0x1.23456789abcdef123456789abc8p+64L);
  71   TEST (0x1.23456789abcde7123456789abc8p+64L);
  72   TEST (0x1.123456789abcdef123456789p-969L);
  73 # if LDBL_MANT_DIG == 106
  74   TEST (-0x1.2d71957cc1263bbbeb1d365f1e8p-969L);
  75   TEST (0x1.23456789abcdef0123456789abp-970L);
  76   TEST (0x1.579bde02468acp-1001L);
  77   TEST (0x0.abcdef0123456p-1022L);
  78   TEST (0x1.abcdef0123456p-1022L);
  79   TEST (0x1.abcdef012345678p-1014L);
  80   TEST (0x1.abcdef0123456f8p-1014L);
  81 # endif
  82 #endif
  83   return result;
  84 }