diff options
Diffstat (limited to 'gl/tests/test-memchr.c')
| -rw-r--r-- | gl/tests/test-memchr.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gl/tests/test-memchr.c b/gl/tests/test-memchr.c index a801614079..05e1bfaed2 100644 --- a/gl/tests/test-memchr.c +++ b/gl/tests/test-memchr.c @@ -57,6 +57,7 @@ main (void) ASSERT (MEMCHR (input + 1, 'a', n - 1) == input + n - 1); ASSERT (MEMCHR (input + 1, 'e', n - 1) == input + n - 2); + ASSERT (MEMCHR (input + 1, 0x789abc00 | 'e', n - 1) == input + n - 2); ASSERT (MEMCHR (input, 'f', n) == NULL); ASSERT (MEMCHR (input, '\0', n) == NULL); @@ -87,25 +88,37 @@ main (void) /* Check that memchr() does not read past the first occurrence of the byte being searched. See the Austin Group's clarification - <http://www.opengroup.org/austin/docs/austin_454.txt>. */ + <http://www.opengroup.org/austin/docs/austin_454.txt>. + Test both '\0' and something else, since some implementations + special-case searching for NUL. + */ { char *page_boundary = (char *) zerosize_ptr (); + /* Too small, and we miss cache line boundary tests; too large, + and the test takes cubically longer to complete. */ + int limit = 257; if (page_boundary != NULL) { - for (n = 1; n <= 500; n++) + for (n = 1; n <= limit; n++) { char *mem = page_boundary - n; memset (mem, 'X', n); ASSERT (MEMCHR (mem, 'U', n) == NULL); + ASSERT (MEMCHR (mem, 0, n) == NULL); { size_t i; + size_t k; for (i = 0; i < n; i++) { mem[i] = 'U'; - ASSERT (MEMCHR (mem, 'U', 4000) == mem + i); + for (k = i + 1; k < n + limit; k++) + ASSERT (MEMCHR (mem, 'U', k) == mem + i); + mem[i] = 0; + for (k = i + 1; k < n + limit; k++) + ASSERT (MEMCHR (mem, 0, k) == mem + i); mem[i] = 'X'; } } |