1 /* Copyright (C) 2002 Free Software Foundation.
3 Test strcmp with various combinations of pointer alignments and lengths to
4 make sure any optimizations in the library are correct.
6 Written by Michael Meissner, March 9, 2002. */
12 #define MAX_OFFSET (sizeof (long long))
16 #define MAX_TEST (8 * sizeof (long long))
20 #define MAX_EXTRA (sizeof (long long))
23 #define MAX_LENGTH (MAX_OFFSET + MAX_TEST + MAX_EXTRA + 2)
26 unsigned char buf[MAX_LENGTH];
32 test (const unsigned char *s1, const unsigned char *s2, int expected)
34 int value = strcmp ((char *) s1, (char *) s2);
36 if (expected < 0 && value >= 0)
38 else if (expected == 0 && value != 0)
40 else if (expected > 0 && value <= 0)
46 size_t off1, off2, len, i;
47 unsigned char *buf1, *buf2;
48 unsigned char *mod1, *mod2;
49 unsigned char *p1, *p2;
51 for (off1 = 0; off1 < MAX_OFFSET; off1++)
52 for (off2 = 0; off2 < MAX_OFFSET; off2++)
53 for (len = 0; len < MAX_TEST; len++)
56 for (i = 0; i < off1; i++)
60 for (i = 0; i < len; i++)
64 for (i = 0; i < MAX_EXTRA+2; i++)
68 for (i = 0; i < off2; i++)
72 for (i = 0; i < len; i++)
76 for (i = 0; i < MAX_EXTRA+2; i++)
86 test (buf1, buf2, +1);
91 test (buf1, buf2, -1);
97 test (buf1, buf2, -1);
103 test (buf1, buf2, +1);
107 mod2[0] = (unsigned char)'\251';
109 test (buf1, buf2, -1);
111 mod1[0] = (unsigned char)'\251';
115 test (buf1, buf2, +1);
117 mod1[0] = (unsigned char)'\251';
119 mod2[0] = (unsigned char)'\252';
121 test (buf1, buf2, -1);
123 mod1[0] = (unsigned char)'\252';
125 mod2[0] = (unsigned char)'\251';
127 test (buf1, buf2, +1);