diff options
Diffstat (limited to 'string/test-strncmp.c')
| -rw-r--r-- | string/test-strncmp.c | 56 |
1 files changed, 35 insertions, 21 deletions
diff --git a/string/test-strncmp.c b/string/test-strncmp.c index b02b98775f..8881909646 100644 --- a/string/test-strncmp.c +++ b/string/test-strncmp.c @@ -23,7 +23,9 @@ typedef int (*proto_t) (const char *, const char *, size_t); int simple_strncmp (const char *, const char *, size_t); +int stupid_strncmp (const char *, const char *, size_t); +IMPL (stupid_strncmp, 0) IMPL (simple_strncmp, 0) IMPL (strncmp, 1) @@ -37,6 +39,18 @@ simple_strncmp (const char *s1, const char *s2, size_t n) return ret; } +int +stupid_strncmp (const char *s1, const char *s2, size_t n) +{ + size_t ns1 = strlen (s1) + 1, ns2 = strlen (s2) + 1; + int ret = 0; + + n = ns1 < n ? ns1 : n; + n = ns2 < n ? ns2 : n; + while (n-- && (ret = *(unsigned char *) s1++ - * (unsigned char *) s2++) == 0); + return ret; +} + static void do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n, int exp_result) @@ -117,7 +131,7 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, static void do_random_tests (void) { - size_t i, j, n, align1, align2, pos, len, size; + size_t i, j, n, align1, align2, pos, len1, len2, size; int result, r; unsigned char *p1 = buf1 + page_size - 512; unsigned char *p2 = buf2 + page_size - 512; @@ -131,22 +145,25 @@ do_random_tests (void) align2 = align1 + (random () & 24); pos = random () & 511; size = random () & 511; - j = align1; - if (align2 > j) - j = align2; + j = align1 > align2 ? align1 : align2; if (pos + j >= 511) pos = 510 - j - (random () & 7); - len = random () & 511; - if (pos >= len) - len = pos + (random () & 7); - if (len + j >= 512) - len = 511 - j - (random () & 7); - j = len + align1 + 64; - if (j > 512) j = 512; + len1 = random () & 511; + if (pos >= len1 && (random () & 1)) + len1 = pos + (random () & 7); + if (len1 + j >= 512) + len1 = 511 - j - (random () & 7); + if (pos >= len1) + len2 = len1; + else + len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0); + j = (pos > len2 ? pos : len2) + align1 + 64; + if (j > 512) + j = 512; for (i = 0; i < j; ++i) { p1[i] = random () & 255; - if (i < len + align1 && !p1[i]) + if (i < len1 + align1 && !p1[i]) { p1[i] = random () & 255; if (!p1[i]) @@ -156,7 +173,7 @@ do_random_tests (void) for (i = 0; i < j; ++i) { p2[i] = random () & 255; - if (i < len + align2 && !p2[i]) + if (i < len2 + align2 && !p2[i]) { p2[i] = random () & 255; if (!p2[i]) @@ -166,12 +183,7 @@ do_random_tests (void) result = 0; memcpy (p2 + align2, p1 + align1, pos); - if (pos >= len) - { - p1[len + align1] = 0; - p2[len + align2] = 0; - } - else + if (pos < len1) { if (p2[align2 + pos] == p1[align1 + pos]) { @@ -188,6 +200,8 @@ do_random_tests (void) result = 1; } } + p1[len1 + align1] = 0; + p2[len2 + align2] = 0; FOR_EACH_IMPL (impl, 1) { @@ -196,8 +210,8 @@ do_random_tests (void) || (r < 0 && result >= 0) || (r > 0 && result <= 0)) { - error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %d != %d, p1 %p p2 %p", - n, impl->name, align1, align2, len, pos, size, r, result, p1, p2); + error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd, %zd) %d != %d, p1 %p p2 %p", + n, impl->name, align1, align2, len1, len2, pos, size, r, result, p1, p2); ret = 1; } } |