test/unit/test_logmath/test_log_int16.c

   1 #include <logmath.h>
   2
   3 #include "test_macros.h"
   4
   5 #define LOG_EPSILON 1500
   6
   7 int
   8 main(int argc, char *argv[])
   9 {
  10         logmath_t *lmath;
  11         int32 rv;
  12
  13         lmath = logmath_init(1.0001, 0, 1);
  14         TEST_ASSERT(lmath);
  15         printf("log(1e-150) = %d\n", logmath_log(lmath, 1e-150));
  16         TEST_EQUAL_LOG(logmath_log(lmath, 1e-150), -3454050);
  17         printf("exp(log(1e-150)) = %e\n",logmath_exp(lmath, logmath_log(lmath, 1e-150)));
  18         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 1e-150)), 1e-150);
  19         printf("log(1e-48) = %d\n", logmath_log(lmath, 1e-48));
  20         printf("exp(log(1e-48)) = %e\n",logmath_exp(lmath, logmath_log(lmath, 1e-48)));
  21         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 1e-48)), 1e-48);
  22         printf("log(42) = %d\n", logmath_log(lmath, 42));
  23         TEST_EQUAL_LOG(logmath_log(lmath, 42), 37378);
  24         printf("exp(log(42)) = %f\n",logmath_exp(lmath, logmath_log(lmath, 42)));
  25         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 42)), 42);
  26         printf("log(1e-3 + 5e-3) = %d l+ %d = %d\n",
  27                logmath_log(lmath, 1e-3),
  28                logmath_log(lmath, 5e-3),
  29                logmath_add(lmath, logmath_log(lmath, 1e-3),
  30                            logmath_log(lmath, 5e-3)));
  31         printf("log(1e-3 + 5e-3) = %e + %e = %e\n",
  32                logmath_exp(lmath, logmath_log(lmath, 1e-3)),
  33                logmath_exp(lmath, logmath_log(lmath, 5e-3)),
  34                logmath_exp(lmath, logmath_add(lmath, logmath_log(lmath, 1e-3),
  35                                               logmath_log(lmath, 5e-3))));
  36         TEST_EQUAL_LOG(logmath_add(lmath, logmath_log(lmath, 1e-48),
  37                                    logmath_log(lmath, 5e-48)),
  38                        logmath_log(lmath, 6e-48));
  39         TEST_EQUAL_LOG(logmath_add(lmath, logmath_log(lmath, 1e-48),
  40                                    logmath_log(lmath, 42)),
  41                        logmath_log(lmath, 42));
  42
  43         rv = logmath_write(lmath, "tmp.logadd");
  44         TEST_EQUAL(rv, 0);
  45         logmath_free(lmath);
  46         lmath = logmath_read("tmp.logadd");
  47         TEST_ASSERT(lmath);
  48         printf("log(1e-150) = %d\n", logmath_log(lmath, 1e-150));
  49         TEST_EQUAL_LOG(logmath_log(lmath, 1e-150), -3454050);
  50         printf("exp(log(1e-150)) = %e\n",logmath_exp(lmath, logmath_log(lmath, 1e-150)));
  51         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 1e-150)), 1e-150);
  52         printf("log(1e-48) = %d\n", logmath_log(lmath, 1e-48));
  53         printf("exp(log(1e-48)) = %e\n",logmath_exp(lmath, logmath_log(lmath, 1e-48)));
  54         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 1e-48)), 1e-48);
  55         printf("log(42) = %d\n", logmath_log(lmath, 42));
  56         TEST_EQUAL_LOG(logmath_log(lmath, 42), 37378);
  57         printf("exp(log(42)) = %f\n",logmath_exp(lmath, logmath_log(lmath, 42)));
  58         TEST_EQUAL_FLOAT(logmath_exp(lmath, logmath_log(lmath, 42)), 41.99);
  59         printf("log(1e-3 + 5e-3) = %d l+ %d = %d\n",
  60                logmath_log(lmath, 1e-3),
  61                logmath_log(lmath, 5e-3),
  62                logmath_add(lmath, logmath_log(lmath, 1e-3),
  63                            logmath_log(lmath, 5e-3)));
  64         printf("log(1e-3 + 5e-3) = %e + %e = %e\n",
  65                logmath_exp(lmath, logmath_log(lmath, 1e-3)),
  66                logmath_exp(lmath, logmath_log(lmath, 5e-3)),
  67                logmath_exp(lmath, logmath_add(lmath, logmath_log(lmath, 1e-3),
  68                                               logmath_log(lmath, 5e-3))));
  69         TEST_EQUAL_LOG(logmath_add(lmath, logmath_log(lmath, 1e-48),
  70                                    logmath_log(lmath, 5e-48)),
  71                        logmath_log(lmath, 6e-48));
  72         TEST_EQUAL_LOG(logmath_add(lmath, logmath_log(lmath, 1e-48),
  73                                    logmath_log(lmath, 42)),
  74                        logmath_log(lmath, 42));
  75
  76         return 0;
  77 }