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test-runner: Avoid intermediate string in number conversion

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Derive a floating-point interval value from integers using math rather
than integer->string->float conversion. The string technique triggered a
-Wformat-overflow warning.
This commit is contained in:
Mat Martineau 2017-07-11 16:10:19 -07:00 committed by Marcel Holtmann
parent 8071b51168
commit 21fae3d1d9
1 changed files with 2 additions and 7 deletions
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9
tools/test-runner.c
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@ -1380,8 +1380,6 @@ start_next_test:
pid_t corpse;
int status;
double interval;
const int BUF_LEN = 11;
char interval_buf[BUF_LEN];
corpse = waitpid(WAIT_ANY, &status, 0);
@ -1394,11 +1392,8 @@ start_next_test:
kill_process(test_timer_pid);
timersub(&time_after, &time_before, &time_elapsed);
sprintf(interval_buf, "%ld.%0ld",
(long int) time_elapsed.tv_sec,
(long int) time_elapsed.tv_usec);
interval_buf[BUF_LEN - 1] = '\0';
interval = atof(interval_buf);
interval = time_elapsed.tv_sec +
1e-6 * time_elapsed.tv_usec;
if (WIFEXITED(status) &&
WEXITSTATUS(status) == EXIT_SUCCESS) {