diff options
Diffstat (limited to 'string/tester.c')
| -rw-r--r-- | string/tester.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/string/tester.c b/string/tester.c index 5105e4eea4..4fed10e4b4 100644 --- a/string/tester.c +++ b/string/tester.c @@ -564,6 +564,52 @@ test_strrchr (void) } void +test_memrchr (void) +{ + size_t l; + it = "memrchr"; + check (memrchr ("abcd", 'z', 5) == NULL, 1); /* Not found. */ + (void) strcpy (one, "abcd"); + l = strlen (one) + 1; + check (memrchr (one, 'c', l) == one+2, 2); /* Basic test. */ + check (memrchr (one, 'd', l) == one+3, 3); /* End of string. */ + check (memrchr (one, 'a', l) == one, 4); /* Beginning. */ + check (memrchr (one, '\0', l) == one+4, 5); /* Finding NUL. */ + (void) strcpy (one, "ababa"); + l = strlen (one) + 1; + check (memrchr (one, 'b', l) == one+3, 6); /* Finding last. */ + (void) strcpy (one, ""); + l = strlen (one) + 1; + check (memrchr (one, 'b', l) == NULL, 7); /* Empty string. */ + check (memrchr (one, '\0', l) == one, 8); /* NUL in empty string. */ + + /* now test all possible alignment and length combinations to catch + bugs due to unrolled loops (assuming unrolling is limited to no + more than 128 byte chunks: */ + { + char buf[128 + sizeof(long)]; + long align, len, i, pos; + + for (align = 0; align < (long) sizeof(long); ++align) { + for (len = 0; len < (long) (sizeof(buf) - align); ++len) { + for (i = 0; i < len; ++i) + buf[align + i] = 'x'; /* don't depend on memset... */ + + for (pos = len - 1; pos >= 0; --pos) { +#if 0 + printf("align %d, len %d, pos %d\n", align, len, pos); +#endif + check(memrchr(buf + align, 'x', len) == buf + align + pos, 9); + check(memrchr(buf + align + pos + 1, 'x', len - (pos + 1)) == NULL, + 10); + buf[align + pos] = '-'; + } + } + } + } +} + +void test_rindex (void) { it = "rindex"; @@ -1183,6 +1229,9 @@ main (void) /* strrchr. */ test_strrchr (); + /* memrchr. */ + test_memrchr (); + /* rindex - just like strrchr. */ test_rindex (); |