Viewing file:  strncmp.c (1.98 KB) -rw-r--r--
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/* Copyright (C) 2000, 2001, 2003 Free Software Foundation.
Ensure all expected transformations of builtin strncmp occur and
perform correctly.
Written by Kaveh R. Ghazi, 11/26/2000. */
extern void abort (void);
typedef __SIZE_TYPE__ size_t;
extern int strncmp (const char *, const char *, size_t);
void
main_test (void)
{
const char *const s1 = "hello world";
const char *s2, *s3;
if (strncmp (s1, "hello world", 12) != 0)
abort();
if (strncmp ("hello world", s1, 12) != 0)
abort();
if (strncmp ("hello", "hello", 6) != 0)
abort();
if (strncmp ("hello", "hello", 2) != 0)
abort();
if (strncmp ("hello", "hello", 100) != 0)
abort();
if (strncmp (s1+10, "d", 100) != 0)
abort();
if (strncmp (10+s1, "d", 100) != 0)
abort();
if (strncmp ("d", s1+10, 1) != 0)
abort();
if (strncmp ("d", 10+s1, 1) != 0)
abort();
if (strncmp ("hello", "aaaaa", 100) <= 0)
abort();
if (strncmp ("aaaaa", "hello", 100) >= 0)
abort();
if (strncmp ("hello", "aaaaa", 1) <= 0)
abort();
if (strncmp ("aaaaa", "hello", 1) >= 0)
abort();
s2 = s1; s3 = s1+4;
if (strncmp (++s2, ++s3, 0) != 0 || s2 != s1+1 || s3 != s1+5)
abort();
s2 = s1;
if (strncmp (++s2, "", 1) <= 0 || s2 != s1+1)
abort();
if (strncmp ("", ++s2, 1) >= 0 || s2 != s1+2)
abort();
if (strncmp (++s2, "", 100) <= 0 || s2 != s1+3)
abort();
if (strncmp ("", ++s2, 100) >= 0 || s2 != s1+4)
abort();
if (strncmp (++s2+6, "", 100) != 0 || s2 != s1+5)
abort();
if (strncmp ("", ++s2+5, 100) != 0 || s2 != s1+6)
abort();
if (strncmp ("ozz", ++s2, 1) != 0 || s2 != s1+7)
abort();
if (strncmp (++s2, "rzz", 1) != 0 || s2 != s1+8)
abort();
s2 = s1; s3 = s1+4;
if (strncmp (++s2, ++s3+2, 1) >= 0 || s2 != s1+1 || s3 != s1+5)
abort();
/* Test at least one instance of the __builtin_ style. We do this
to ensure that it works and that the prototype is correct. */
if (__builtin_strncmp ("hello", "a", 100) <= 0)
abort();
}
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