test/test-floatingpoint.c

#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <stdint.h>

__AFL_FUZZ_INIT();

int main(void) {

  ssize_t bytes_read;

  __AFL_INIT();
  float *magic = (float *)__AFL_FUZZ_TESTCASE_BUF;

  while (__AFL_LOOP(INT_MAX)) {

    int len = __AFL_FUZZ_TESTCASE_LEN;
    if (len < sizeof(float)) return 1;

    /* 15 + 1/2                      = 15.5  */
    /* 15 + 1/2 + 1/8                = 15.625  */
    /* 15 + 1/2 + 1/8 + 1/32         = 15.65625  */
    /* 15 + 1/2 + 1/8 + 1/32 + 1/128 = 15.6640625  */
    if ((*magic >= 15.0 + 0.5 + 0.125 + 0.03125) &&
        (*magic <= 15.0 + 0.5 + 0.125 + 0.03125 + 0.0078125))
      abort();

  }

  return 0;

}