diff options
Diffstat (limited to 'string')
| -rw-r--r-- | string/test-strncmp.c | 178 |
1 files changed, 129 insertions, 49 deletions
diff --git a/string/test-strncmp.c b/string/test-strncmp.c index aaf4b4aac7..fb57a9bdc5 100644 --- a/string/test-strncmp.c +++ b/string/test-strncmp.c @@ -1,4 +1,4 @@ -/* Test and measure strncmp functions. +/* Test strncmp and wcsncmp functions. Copyright (C) 1999-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. Written by Jakub Jelinek <jakub@redhat.com>, 1999. @@ -18,17 +18,80 @@ <http://www.gnu.org/licenses/>. */ #define TEST_MAIN -#define TEST_NAME "strncmp" +#ifdef WIDE +# define TEST_NAME "wcsncmp" +#else +# define TEST_NAME "strncmp" +#endif #include "test-string.h" -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); +#ifdef WIDE +# include <wchar.h> + +# define L(str) L##str +# define STRNCMP wcsncmp +# define STRCPY wcscpy +# define STRDUP wcsdup +# define MEMCPY wmemcpy +# define SIMPLE_STRNCMP simple_wcsncmp +# define STUPID_STRNCMP stupid_wcsncmp +# define CHAR wchar_t +# define UCHAR wchar_t +# define CHARBYTES 4 +# define CHAR__MAX WCHAR_MAX +# define CHAR__MIN WCHAR_MIN + +/* Wcsncmp uses signed semantics for comparison, not unsigned. + Avoid using substraction since possible overflow */ +int +simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) +{ + wchar_t c1, c2; + + while (n--) + { + c1 = *s1++; + c2 = *s2++; + if (c1 == L('\0') || c1 != c2) + return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0); + } + return 0; +} -IMPL (stupid_strncmp, 0) -IMPL (simple_strncmp, 0) -IMPL (strncmp, 1) +int +stupid_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) +{ + wchar_t c1, c2; + size_t ns1 = wcsnlen (s1, n) + 1, ns2 = wcsnlen (s2, n) + 1; + + n = ns1 < n ? ns1 : n; + n = ns2 < n ? ns2 : n; + + while (n--) + { + c1 = *s1++; + c2 = *s2++; + if (c1 != c2) + return c1 > c2 ? 1 : -1; + } + return 0; +} +#else +# define L(str) str +# define STRNCMP strncmp +# define STRCPY strcpy +# define STRDUP strdup +# define MEMCPY memcpy +# define SIMPLE_STRNCMP simple_strncmp +# define STUPID_STRNCMP stupid_strncmp +# define CHAR char +# define UCHAR unsigned char +# define CHARBYTES 1 +# define CHAR__MAX CHAR_MAX +# define CHAR__MIN CHAR_MIN + +/* Strncmp uses unsigned semantics for comparison. */ int simple_strncmp (const char *s1, const char *s2, size_t n) { @@ -51,8 +114,17 @@ stupid_strncmp (const char *s1, const char *s2, size_t n) return ret; } +#endif + +typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); + +IMPL (STUPID_STRNCMP, 0) +IMPL (SIMPLE_STRNCMP, 0) +IMPL (STRNCMP, 1) + + static int -check_result (impl_t *impl, const char *s1, const char *s2, size_t n, +check_result (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n, int exp_result) { int result = CALL (impl, s1, s2, n); @@ -70,7 +142,7 @@ check_result (impl_t *impl, const char *s1, const char *s2, size_t n, } static void -do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n, +do_one_test (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n, int exp_result) { if (check_result (impl, s1, s2, n, exp_result) < 0) @@ -82,12 +154,12 @@ do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char, int exp_result) { size_t i, align_n; - char *s1, *s2; + CHAR *s1, *s2; if (n == 0) { - s1 = (char*)(buf1 + page_size); - s2 = (char*)(buf2 + page_size); + s1 = (CHAR *) (buf1 + page_size); + s2 = (CHAR *) (buf2 + page_size); FOR_EACH_IMPL (impl, 0) do_one_test (impl, s1, s2, n, 0); @@ -97,16 +169,16 @@ do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char, align1 &= 15; align2 &= 15; - align_n = (page_size - n) & 15; + align_n = (page_size - n * CHARBYTES) & 15; - s1 = (char*)(buf1 + page_size - n); - s2 = (char*)(buf2 + page_size - n); + s1 = (CHAR *) (buf1 + page_size - n * CHARBYTES); + s2 = (CHAR *) (buf2 + page_size - n * CHARBYTES); if (align1 < align_n) - s1 -= (align_n - align1); + s1 = (CHAR *) ((char *) s1 - (align_n - align1)); if (align2 < align_n) - s2 -= (align_n - align2); + s2 = (CHAR *) ((char *) s2 - (align_n - align2)); for (i = 0; i < n; i++) s1[i] = s2[i] = 1 + 23 * i % max_char; @@ -130,24 +202,24 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, int exp_result) { size_t i; - char *s1, *s2; + CHAR *s1, *s2; if (n == 0) return; - align1 &= 7; - if (align1 + n + 1 >= page_size) + align1 &= 63; + if (align1 + (n + 1) * CHARBYTES >= page_size) return; - align2 &= 7; - if (align2 + n + 1 >= page_size) + align2 &= 63; + if (align2 + (n + 1) * CHARBYTES >= page_size) return; - s1 = (char*)(buf1 + align1); - s2 = (char*)(buf2 + align2); + s1 = (CHAR *) (buf1 + align1); + s2 = (CHAR *) (buf2 + align2); for (i = 0; i < n; i++) - s1[i] = s2[i] = 1 + 23 * i % max_char; + s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; s1[n] = 24 + exp_result; s2[n] = 23; @@ -161,19 +233,20 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, s2[n - 1] -= exp_result; FOR_EACH_IMPL (impl, 0) - do_one_test (impl, (char*)s1, (char*)s2, n, exp_result); + do_one_test (impl, s1, s2, n, exp_result); } static void -do_page_test (size_t offset1, size_t offset2, char *s2) +do_page_test (size_t offset1, size_t offset2, CHAR *s2) { - char *s1; + CHAR *s1; int exp_result; - if (offset1 >= page_size || offset2 >= page_size) + if (offset1 * CHARBYTES >= page_size || offset2 * CHARBYTES >= page_size) return; - s1 = (char *) (buf1 + offset1); + s1 = (CHAR *) buf1; + s1 += offset1; s2 += offset2; exp_result= *s1; @@ -191,8 +264,8 @@ do_random_tests (void) size_t i, j, n, align1, align2, pos, len1, len2, size; int result; long r; - unsigned char *p1 = buf1 + page_size - 512; - unsigned char *p2 = buf2 + page_size - 512; + UCHAR *p1 = (UCHAR *) (buf1 + page_size - 512 * CHARBYTES); + UCHAR *p2 = (UCHAR *) (buf2 + page_size - 512 * CHARBYTES); for (n = 0; n < ITERATIONS; n++) { @@ -240,7 +313,7 @@ do_random_tests (void) } result = 0; - memcpy (p2 + align2, p1 + align1, pos); + MEMCPY (p2 + align2, p1 + align1, pos); if (pos < len1) { if (p2[align2 + pos] == p1[align1 + pos]) @@ -263,7 +336,7 @@ do_random_tests (void) FOR_EACH_IMPL (impl, 1) { - r = CALL (impl, (char*)(p1 + align1), (char*)(p2 + align2), size); + r = CALL (impl, (CHAR *) (p1 + align1), (CHAR *) (p2 + align2), size); /* Test whether on 64-bit architectures where ABI requires callee to promote has the promotion been done. */ asm ("" : "=g" (r) : "0" (r)); @@ -282,19 +355,26 @@ do_random_tests (void) static void check1 (void) { - char *s1 = (char *)(buf1 + 0xb2c); - char *s2 = (char *)(buf1 + 0xfd8); - size_t i; + CHAR *s1 = (CHAR *) (buf1 + 0xb2c); + CHAR *s2 = (CHAR *) (buf1 + 0xfd8); + size_t i, offset; int exp_result; - strcpy(s1, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs"); - strcpy(s2, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV"); + STRCPY(s1, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs")); + STRCPY(s2, L("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkLMNOPQRSTUV")); + + /* Check possible overflow bug for wcsncmp */ + s1[4] = CHAR__MAX; + s2[4] = CHAR__MIN; - for (i = 0; i < 80; i++) + for (offset = 0; offset < 6; offset++) { - exp_result = simple_strncmp (s1, s2, i); - FOR_EACH_IMPL (impl, 0) - check_result (impl, s1, s2, i, exp_result); + for (i = 0; i < 80; i++) + { + exp_result = SIMPLE_STRNCMP (s1 + offset, s2 + offset, i); + FOR_EACH_IMPL (impl, 0) + check_result (impl, s1 + offset, s2 + offset, i, exp_result); + } } } @@ -302,17 +382,17 @@ static void check2 (void) { size_t i; - char *s1, *s2; + CHAR *s1, *s2; - s1 = (char *) buf1; - for (i = 0; i < page_size - 1; i++) + s1 = (CHAR *) buf1; + for (i = 0; i < (page_size / CHARBYTES) - 1; i++) s1[i] = 23; s1[i] = 0; - s2 = strdup (s1); + s2 = STRDUP (s1); for (i = 0; i < 64; ++i) - do_page_test (3990 + i, 2635, s2); + do_page_test ((3988 / CHARBYTES) + i, (2636 / CHARBYTES), s2); free (s2); } |