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1 #include "double_conversion.h"
2 #include <math.h>
3 #include <stdio.h>
4 
5 static const double testvalues[] = {
6            0.0,        -0.0,         0.1,         -0.1,
7           M_PI,       -M_PI,  123456.789,  -123456.789,
8       INFINITY,   -INFINITY,         NAN, INFINITY - INFINITY,
9           1e38,       -1e38,        1e39,        -1e39,
10          1e-38,      -1e-38,       1e-39,       -1e-39,
11    3.14159e-37,-3.14159e-37, 3.14159e-43, -3.14159e-43,
12          1e-60,      -1e-60,       1e-45,       -1e-45,
13     0.99999999999999, -0.99999999999999, 127.999999999999, -127.999999999999
14 };
15 
16 #define TESTVALUES_COUNT (sizeof(testvalues)/sizeof(testvalues[0]))
17 
main()18 int main()
19 {
20     int status = 0;
21     int i;
22     for (i = 0; i < TESTVALUES_COUNT; i++)
23     {
24         double orig = testvalues[i];
25         float expected_float = (float)orig;
26         double expected_double = (double)expected_float;
27 
28         float got_float = double_to_float(*(uint64_t*)&orig);
29         uint64_t got_double = float_to_double(got_float);
30 
31         uint32_t e1 = *(uint32_t*)&expected_float;
32         uint32_t g1 = *(uint32_t*)&got_float;
33         uint64_t e2 = *(uint64_t*)&expected_double;
34         uint64_t g2 = got_double;
35 
36         if (g1 != e1)
37         {
38             printf("%3d double_to_float fail: %08x != %08x\n", i, g1, e1);
39             status = 1;
40         }
41 
42         if (g2 != e2)
43         {
44             printf("%3d float_to_double fail: %016llx != %016llx\n", i,
45                 (unsigned long long)g2,
46                 (unsigned long long)e2);
47             status = 1;
48         }
49     }
50 
51     return status;
52 }
53 
54 
55 
56 
57