Viewing file:  string-opt-5.c (2.57 KB) -rw-r--r--
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/* Copyright (C) 2000 Free Software Foundation.
Ensure builtin strlen, strcmp, strchr, strrchr and strncpy
perform correctly.
Written by Jakub Jelinek, 11/7/2000. */
extern void abort (void);
extern __SIZE_TYPE__ strlen (const char *);
extern int strcmp (const char *, const char *);
extern char *strchr (const char *, int);
extern char *strrchr (const char *, int);
extern char *strncpy (char *, const char *, __SIZE_TYPE__);
extern void *memset (void *, int, __SIZE_TYPE__);
extern int memcmp (const void *, const void *, __SIZE_TYPE__);
int x = 6;
int y = 1;
char *bar = "hi world";
char buf [64];
int main()
{
const char *const foo = "hello world";
char dst [64];
if (strlen (bar) != 8)
abort ();
if (strlen (bar + (++x & 2)) != 6)
abort ();
if (x != 7)
abort ();
if (strlen (foo + (x++, 6)) != 5)
abort ();
if (x != 8)
abort ();
if (strlen (foo + (++x & 1)) != 10)
abort ();
if (x != 9)
abort ();
if (strcmp (foo + (x -= 6), "lo world"))
abort ();
if (x != 3)
abort ();
if (strcmp (foo, bar) >= 0)
abort ();
if (strcmp (foo, bar + (x++ & 1)) >= 0)
abort ();
if (x != 4)
abort ();
if (strchr (foo + (x++ & 7), 'l') != foo + 9)
abort ();
if (x != 5)
abort ();
if (strchr (bar, 'o') != bar + 4)
abort ();
if (strchr (bar, '\0') != bar + 8)
abort ();
if (strrchr (bar, 'x'))
abort ();
if (strrchr (bar, 'o') != bar + 4)
abort ();
if (strcmp (foo + (x++ & 1), "ello world" + (--y & 1)))
abort ();
if (x != 6 || y != 0)
abort ();
dst[5] = ' ';
dst[6] = '\0';
x = 5;
y = 1;
if (strncpy (dst + 1, foo + (x++ & 3), 4) != dst + 1
|| x != 6
|| strcmp (dst + 1, "ello "))
abort ();
memset (dst, ' ', sizeof dst);
if (strncpy (dst + (++x & 1), (y++ & 3) + "foo", 10) != dst + 1
|| x != 7
|| y != 2
|| memcmp (dst, " oo\0\0\0\0\0\0\0\0 ", 12))
abort ();
memset (dst, ' ', sizeof dst);
if (strncpy (dst, "hello", 8) != dst || memcmp (dst, "hello\0\0\0 ", 9))
abort ();
x = '!';
memset (buf, ' ', sizeof buf);
if (memset (buf, x++, ++y) != buf
|| x != '!' + 1
|| y != 3
|| memcmp (buf, "!!!", 3))
abort ();
if (memset (buf + y++, '-', 8) != buf + 3
|| y != 4
|| memcmp (buf, "!!!--------", 11))
abort ();
x = 10;
if (memset (buf + ++x, 0, y++) != buf + 11
|| x != 11
|| y != 5
|| memcmp (buf + 8, "---\0\0\0", 7))
abort ();
if (memset (buf + (x += 4), 0, 6) != buf + 15
|| x != 15
|| memcmp (buf + 10, "-\0\0\0\0\0\0\0\0\0", 11))
abort ();
return 0;
}
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