import newlib-2000-02-17 snapshot

1 files changed, 556 insertions, 0 deletions

diff --git a/newlib/libm/test/string.c b/newlib/libm/test/string.c
new file mode 100644
index 000000000..c47047212
--- /dev/null
+++ b/newlib/libm/test/string.c
@@ -0,0 +1,556 @@
+#include "test.h"
+#include <string.h>
+#include <errno.h>
+
+
+_CONST char *it = "<UNSET>";	/* Routine name for message routines. */
+int  errors = 0;
+
+/* Complain if condition is not true.  */
+#define check(thing) checkit(thing, __LINE__)
+
+void
+_DEFUN(checkit,(ok,l),
+       int ok _AND
+       int l )
+
+{
+  newfunc(it);
+  line(l);
+  
+  if (!ok)
+  {
+    printf("string.c:%d %s\n", l, it);
+    ++errors;
+  }
+}
+
+
+
+/* Complain if first two args don't strcmp as equal.  */
+#define equal(a, b)  funcqual(a,b,__LINE__);
+
+void
+_DEFUN(funcqual,(a,b,l),
+       char *a _AND
+       char *b _AND
+       int l)
+{
+  newfunc(it);
+  
+  line(l);
+  if (a == NULL && b == NULL) return;
+  if (strcmp(a,b)) {
+      printf("string.c:%d (%s)\n", l, it);  
+    }
+}
+
+
+
+static char one[50];
+static char two[50];
+
+
+void test_string()
+{
+  /* Test strcmp first because we use it to test other things.  */
+  it = "strcmp";
+  check(strcmp("", "") == 0); /* Trivial case. */
+  check(strcmp("a", "a") == 0); /* Identity. */
+  check(strcmp("abc", "abc") == 0); /* Multicharacter. */
+  check(strcmp("abc", "abcd") < 0); /* Length mismatches. */
+  check(strcmp("abcd", "abc") > 0);
+  check(strcmp("abcd", "abce") < 0);	/* Honest miscompares. */
+  check(strcmp("abce", "abcd") > 0);
+  check(strcmp("a\103", "a") > 0); /* Tricky if char signed. */
+  check(strcmp("a\103", "a\003") > 0);
+
+  /* Test strcpy next because we need it to set up other tests.  */
+  it = "strcpy";
+  check(strcpy(one, "abcd") == one);	/* Returned value. */
+  equal(one, "abcd");	/* Basic test. */
+
+  (void) strcpy(one, "x");
+  equal(one, "x");		/* Writeover. */
+  equal(one+2, "cd");	/* Wrote too much? */
+
+  (void) strcpy(two, "hi there");
+  (void) strcpy(one, two);
+  equal(one, "hi there");	/* Basic test encore. */
+  equal(two, "hi there");	/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  equal(one, "");		/* Boundary condition. */
+
+  /* strcat.  */
+  it = "strcat";
+  (void) strcpy(one, "ijk");
+  check(strcat(one, "lmn") == one); /* Returned value. */
+  equal(one, "ijklmn");	/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strcat(one, "yz");
+  equal(one, "xyz");		/* Writeover. */
+  equal(one+4, "mn");	/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strcat(one, two);
+  equal(one, "ghef");	/* Basic test encore. */
+  equal(two, "ef");		/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strcat(one, "");
+  equal(one, "");		/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strcat(one, "");
+  equal(one, "ab");
+  (void) strcpy(one, "");
+  (void) strcat(one, "cd");
+  equal(one, "cd");
+
+  /* strncat - first test it as strcat, with big counts,
+     then test the count mechanism.  */
+  it = "strncat";
+  (void) strcpy(one, "ijk");
+  check(strncat(one, "lmn", 99) == one); /* Returned value. */
+  equal(one, "ijklmn");	/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strncat(one, "yz", 99);
+  equal(one, "xyz");		/* Writeover. */
+  equal(one+4, "mn");	/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strncat(one, two, 99);
+  equal(one, "ghef");	/* Basic test encore. */
+  equal(two, "ef");		/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strncat(one, "", 99);
+  equal(one, "");		/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "", 99);
+  equal(one, "ab");
+  (void) strcpy(one, "");
+  (void) strncat(one, "cd", 99);
+  equal(one, "cd");
+
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "cdef", 2);
+  equal(one, "abcd");	/* Count-limited. */
+
+  (void) strncat(one, "gh", 0);
+  equal(one, "abcd");	/* Zero count. */
+
+  (void) strncat(one, "gh", 2);
+  equal(one, "abcdgh");	/* Count _AND length equal. */
+  it = "strncmp";
+  /* strncmp - first test as strcmp with big counts";*/
+  check(strncmp("", "", 99) == 0); /* Trivial case. */
+  check(strncmp("a", "a", 99) == 0);	/* Identity. */
+  check(strncmp("abc", "abc", 99) == 0); /* Multicharacter. */
+  check(strncmp("abc", "abcd", 99) < 0); /* Length unequal. */
+  check(strncmp("abcd", "abc",99) > 0);
+  check(strncmp("abcd", "abce", 99) < 0); /* Honestly unequal. */
+  check(strncmp("abce", "abcd",99)>0);
+  check(strncmp("abce", "abcd", 3) == 0); /* Count limited. */
+  check(strncmp("abce", "abc", 3) == 0); /* Count == length. */
+  check(strncmp("abcd", "abce", 4) < 0); /* Nudging limit. */
+  check(strncmp("abc", "def", 0) == 0); /* Zero count. */
+
+  /* strncpy - testing is a bit different because of odd semantics.  */
+  it = "strncpy";
+  check(strncpy(one, "abc", 4) == one); /* Returned value. */
+  equal(one, "abc");		/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 2);
+  equal(one, "xycdefgh");	/* Copy cut by count. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 3); /* Copy cut just before NUL. */
+  equal(one, "xyzdefgh");
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 4); /* Copy just includes NUL. */
+  equal(one, "xyz");
+  equal(one+4, "efgh");	/* Wrote too much? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 5); /* Copy includes padding. */
+  equal(one, "xyz");
+  equal(one+4, "");
+  equal(one+5, "fgh");
+
+  (void) strcpy(one, "abc");
+  (void) strncpy(one, "xyz", 0); /* Zero-length copy. */
+  equal(one, "abc");	
+
+  (void) strncpy(one, "", 2);	/* Zero-length source. */
+  equal(one, "");
+  equal(one+1, "");	
+  equal(one+2, "c");
+
+  (void) strcpy(one, "hi there");
+  (void) strncpy(two, one, 9);
+  equal(two, "hi there");	/* Just paranoia. */
+  equal(one, "hi there");	/* Stomped on source? */
+
+  /* strlen.  */
+  it = "strlen";
+  check(strlen("") == 0);	/* Empty. */
+  check(strlen("a") == 1);	/* Single char. */
+  check(strlen("abcd") == 4); /* Multiple chars. */
+
+  /* strchr.  */
+  it = "strchr";
+  check(strchr("abcd", 'z') == NULL); /* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strchr(one, 'c') == one+2); /* Basic test. */
+  check(strchr(one, 'd') == one+3); /* End of string. */
+  check(strchr(one, 'a') == one); /* Beginning. */
+  check(strchr(one, '\0') == one+4);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strchr(one, 'b') == one+1); /* Finding first. */
+  (void) strcpy(one, "");
+  check(strchr(one, 'b') == NULL); /* Empty string. */
+  check(strchr(one, '\0') == one); /* NUL in empty string. */
+
+  /* index - just like strchr.  */
+  it = "index";
+  check(index("abcd", 'z') == NULL);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(index(one, 'c') == one+2); /* Basic test. */
+  check(index(one, 'd') == one+3); /* End of string. */
+  check(index(one, 'a') == one); /* Beginning. */
+  check(index(one, '\0') == one+4); /* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(index(one, 'b') == one+1); /* Finding first. */
+  (void) strcpy(one, "");
+  check(index(one, 'b') == NULL); /* Empty string. */
+  check(index(one, '\0') == one); /* NUL in empty string. */
+
+  /* strrchr.  */
+  it = "strrchr";
+  check(strrchr("abcd", 'z') == NULL); /* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strrchr(one, 'c') == one+2);	/* Basic test. */
+  check(strrchr(one, 'd') == one+3);	/* End of string. */
+  check(strrchr(one, 'a') == one); /* Beginning. */
+  check(strrchr(one, '\0') == one+4); /* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strrchr(one, 'b') == one+3);	/* Finding last. */
+  (void) strcpy(one, "");
+  check(strrchr(one, 'b') == NULL); /* Empty string. */
+  check(strrchr(one, '\0') == one); /* NUL in empty string. */
+
+  /* rindex - just like strrchr.  */
+  it = "rindex";
+  check(rindex("abcd", 'z') == NULL); /* Not found. */
+  (void) strcpy(one, "abcd");
+  check(rindex(one, 'c') == one+2); /* Basic test. */
+  check(rindex(one, 'd') == one+3); /* End of string. */
+  check(rindex(one, 'a') == one); /* Beginning. */
+  check(rindex(one, '\0') == one+4);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(rindex(one, 'b') == one+3); /* Finding last. */
+  (void) strcpy(one, "");
+  check(rindex(one, 'b') == NULL); /* Empty string. */
+  check(rindex(one, '\0') == one); /* NUL in empty string. */
+
+  /* strpbrk - somewhat like strchr.  */
+  it = "strpbrk";
+  check(strpbrk("abcd", "z") == NULL); /* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strpbrk(one, "c") == one+2);	/* Basic test. */
+  check(strpbrk(one, "d") == one+3);	/* End of string. */
+  check(strpbrk(one, "a") == one); /* Beginning. */
+  check(strpbrk(one, "") == NULL); /* Empty search list. */
+  check(strpbrk(one, "cb") == one+1); /* Multiple search. */
+  (void) strcpy(one, "abcabdea");
+  check(strpbrk(one, "b") == one+1);	/* Finding first. */
+  check(strpbrk(one, "cb") == one+1); /* With multiple search. */
+  check(strpbrk(one, "db") == one+1); /* Another variant. */
+  (void) strcpy(one, "");
+  check(strpbrk(one, "bc") == NULL); /* Empty string. */
+  check(strpbrk(one, "") == NULL); /* Both strings empty. */
+
+  /* strstr - somewhat like strchr.  */
+  it = "strstr";
+  check(strstr("z", "abcd") == NULL); /* Not found. */
+  check(strstr("abx", "abcd") == NULL); /* Dead end. */
+  (void) strcpy(one, "abcd");
+  check(strstr(one,"c") == one+2); /* Basic test. */
+  check(strstr(one, "bc") == one+1);	/* Multichar. */
+  check(strstr(one,"d") == one+3); /* End of string. */
+  check(strstr(one,"cd") == one+2);	/* Tail of string. */
+  check(strstr(one,"abc") == one); /* Beginning. */
+  check(strstr(one,"abcd") == one);	/* Exact match. */
+  check(strstr(one,"de") == NULL);	/* Past end. */
+  check(strstr(one,"") == one); /* Finding empty. */
+  (void) strcpy(one, "ababa");
+  check(strstr(one,"ba") == one+1); /* Finding first. */
+  (void) strcpy(one, "");
+  check(strstr(one, "b") == NULL); /* Empty string. */
+  check(strstr(one,"") == one); /* Empty in empty string. */
+  (void) strcpy(one, "bcbca");
+  check(strstr(one,"bca") == one+2); /* False start. */
+  (void) strcpy(one, "bbbcabbca");
+  check(strstr(one,"bbca") == one+1); /* With overlap. */
+
+  /* strspn.  */
+  it = "strspn";
+  check(strspn("abcba", "abc") == 5); /* Whole string. */
+  check(strspn("abcba", "ab") == 2);	/* Partial. */
+  check(strspn("abc", "qx") == 0); /* None. */
+  check(strspn("", "ab") == 0); /* Null string. */
+  check(strspn("abc", "") == 0); /* Null search list. */
+
+  /* strcspn.  */
+  it = "strcspn";
+  check(strcspn("abcba", "qx") == 5); /* Whole string. */
+  check(strcspn("abcba", "cx") == 2); /* Partial. */
+  check(strcspn("abc", "abc") == 0);	/* None. */
+  check(strcspn("", "ab") == 0); /* Null string. */
+  check(strcspn("abc", "") == 3); /* Null search list. */
+
+  /* strtok - the hard one.  */
+  it = "strtok";
+  (void) strcpy(one, "first, second, third");
+  equal(strtok(one, ", "), "first");	/* Basic test. */
+  equal(one, "first");
+  equal(strtok((char *)NULL, ", "), "second");
+  equal(strtok((char *)NULL, ", "), "third");
+  check(strtok((char *)NULL, ", ") == NULL);
+  (void) strcpy(one, ", first, ");
+  equal(strtok(one, ", "), "first");	/* Extra delims, 1 tok. */
+  check(strtok((char *)NULL, ", ") == NULL);
+  (void) strcpy(one, "1a, 1b; 2a, 2b");
+  equal(strtok(one, ", "), "1a"); /* Changing delim lists. */
+  equal(strtok((char *)NULL, "; "), "1b");
+  equal(strtok((char *)NULL, ", "), "2a");
+  (void) strcpy(two, "x-y");
+  equal(strtok(two, "-"), "x"); /* New string before done. */
+  equal(strtok((char *)NULL, "-"), "y");
+  check(strtok((char *)NULL, "-") == NULL);
+  (void) strcpy(one, "a,b, c,, ,d");
+  equal(strtok(one, ", "), "a"); /* Different separators. */
+  equal(strtok((char *)NULL, ", "), "b");
+  equal(strtok((char *)NULL, " ,"), "c"); /* Permute list too. */
+  equal(strtok((char *)NULL, " ,"), "d");
+  check(strtok((char *)NULL, ", ") == NULL);
+  check(strtok((char *)NULL, ", ") == NULL); /* Persistence. */
+  (void) strcpy(one, ", ");
+  check(strtok(one, ", ") == NULL);	/* No tokens. */
+  (void) strcpy(one, "");
+  check(strtok(one, ", ") == NULL);	/* Empty string. */
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ", "), "abc"); /* No delimiters. */
+  check(strtok((char *)NULL, ", ") == NULL);
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ""), "abc"); /* Empty delimiter list. */
+  check(strtok((char *)NULL, "") == NULL);
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(one, "a,b,c");
+  equal(strtok(one, ","), "a"); /* Basics again... */
+  equal(strtok((char *)NULL, ","), "b");
+  equal(strtok((char *)NULL, ","), "c");
+  check(strtok((char *)NULL, ",") == NULL);
+  equal(one+6, "gh");	/* Stomped past end? */
+  equal(one, "a");		/* Stomped old tokens? */
+  equal(one+2, "b");
+  equal(one+4, "c");
+
+  /* memcmp.  */
+  it = "memcmp";
+  check(memcmp("a", "a", 1) == 0); /* Identity. */
+  check(memcmp("abc", "abc", 3) == 0); /* Multicharacter. */
+  check(memcmp("abcd", "abce", 4) < 0); /* Honestly unequal. */
+  check(memcmp("abce", "abcd",4));
+  check(memcmp("alph", "beta", 4) < 0);
+  check(memcmp("abce", "abcd", 3) == 0); /* Count limited. */
+  check(memcmp("abc", "def", 0) == 0); /* Zero count. */
+
+  /* memcmp should test strings as unsigned */
+  one[0] = 0xfe;
+  two[0] = 0x03;
+  check(memcmp(one, two,1) > 0);
+  
+  
+  /* memchr.  */
+  it = "memchr";
+  check(memchr("abcd", 'z', 4) == NULL); /* Not found. */
+  (void) strcpy(one, "abcd");
+  check(memchr(one, 'c', 4) == one+2); /* Basic test. */
+  check(memchr(one, 'd', 4) == one+3); /* End of string. */
+  check(memchr(one, 'a', 4) == one);	/* Beginning. */
+  check(memchr(one, '\0', 5) == one+4); /* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(memchr(one, 'b', 5) == one+1); /* Finding first. */
+  check(memchr(one, 'b', 0) == NULL); /* Zero count. */
+  check(memchr(one, 'a', 1) == one);	/* Singleton case. */
+  (void) strcpy(one, "a\203b");
+  check(memchr(one, 0203, 3) == one+1); /* Unsignedness. */
+
+  /* memcpy - need not work for overlap.  */
+  it = "memcpy";
+  check(memcpy(one, "abc", 4) == one); /* Returned value. */
+  equal(one, "abc");		/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memcpy(one+1, "xyz", 2);
+  equal(one, "axydefgh");	/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memcpy(one, "xyz", 0);
+  equal(one, "abc");		/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memcpy(two, one, 9);
+  equal(two, "hi there");	/* Just paranoia. */
+  equal(one, "hi there");	/* Stomped on source? */
+#if 0
+  /* memmove - must work on overlap.  */
+  it = "memmove";
+  check(memmove(one, "abc", 4) == one); /* Returned value. */
+  equal(one, "abc");		/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, "xyz", 2);
+  equal(one, "axydefgh");	/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memmove(one, "xyz", 0);
+  equal(one, "abc");		/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memmove(two, one, 9);
+  equal(two, "hi there");	/* Just paranoia. */
+  equal(one, "hi there");	/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one, 9);
+  equal(one, "aabcdefgh");	/* Overlap, right-to-left. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one+2, 7);
+  equal(one, "acdefgh");	/* Overlap, left-to-right. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one, one, 9);
+  equal(one, "abcdefgh");	/* 100% overlap. */
+#endif
+#if 0
+  /* memccpy - first test like memcpy, then the search part
+     The SVID, the only place where memccpy is mentioned, says
+     overlap might fail, so we don't try it.  Besides, it's hard
+     to see the rationale for a non-left-to-right memccpy.  */
+  it = "memccpy";
+  check(memccpy(one, "abc", 'q', 4) == NULL); /* Returned value. */
+  equal(one, "abc");		/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memccpy(one+1, "xyz", 'q', 2);
+  equal(one, "axydefgh");	/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memccpy(one, "xyz", 'q', 0);
+  equal(one, "abc");		/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memccpy(two, one, 'q', 9);
+  equal(two, "hi there");	/* Just paranoia. */
+  equal(one, "hi there");	/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(two, "horsefeathers");
+  check(memccpy(two, one, 'f', 9) == two+6);	/* Returned value. */
+  equal(one, "abcdefgh");	/* Source intact? */
+  equal(two, "abcdefeathers"); /* Copy correct? */
+
+  (void) strcpy(one, "abcd");
+  (void) strcpy(two, "bumblebee");
+  check(memccpy(two, one, 'a', 4) == two+1); /* First char. */
+  equal(two, "aumblebee");
+  check(memccpy(two, one, 'd', 4) == two+4); /* Last char. */
+  equal(two, "abcdlebee");
+  (void) strcpy(one, "xyz");
+  check(memccpy(two, one, 'x', 1) == two+1); /* Singleton. */
+  equal(two, "xbcdlebee");
+#endif
+  /* memset.  */
+  it = "memset";
+  (void) strcpy(one, "abcdefgh");
+  check(memset(one+1, 'x', 3) == one+1); /* Return value. */
+  equal(one, "axxxefgh");	/* Basic test. */
+
+  (void) memset(one+2, 'y', 0);
+  equal(one, "axxxefgh");	/* Zero-length set. */
+
+  (void) memset(one+5, 0, 1);
+  equal(one, "axxxe");	/* Zero fill. */
+  equal(one+6, "gh");	/* _AND the leftover. */
+
+  (void) memset(one+2, 010045, 1);
+  equal(one, "ax\045xe");	/* Unsigned char convert. */
+
+  /* bcopy - much like memcpy.
+     Berklix manual is silent about overlap, so don't test it.  */
+  it = "bcopy";
+  (void) bcopy("abc", one, 4);
+  equal(one, "abc");		/* Simple copy. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) bcopy("xyz", one+1, 2);
+  equal(one, "axydefgh");	/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) bcopy("xyz", one, 0);
+  equal(one, "abc");		/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) bcopy(one, two, 9);
+  equal(two, "hi there");	/* Just paranoia. */
+  equal(one, "hi there");	/* Stomped on source? */
+
+  /* bzero.  */
+  it = "bzero";
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 2);
+  equal(one, "ab");		/* Basic test. */
+  equal(one+3, "");
+  equal(one+4, "ef");
+
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 0);
+  equal(one, "abcdef");	/* Zero-length copy. */
+
+  /* bcmp - somewhat like memcmp.  */
+  it = "bcmp";
+  check(bcmp("a", "a", 1) == 0); /* Identity. */
+  check(bcmp("abc", "abc", 3) == 0);	/* Multicharacter. */
+  check(bcmp("abcd", "abce", 4) != 0); /* Honestly unequal. */
+  check(bcmp("abce", "abcd",4));
+  check(bcmp("alph", "beta", 4) != 0);
+  check(bcmp("abce", "abcd", 3) == 0); /* Count limited. */
+  check(bcmp("abc", "def", 0) == 0);	/* Zero count. */
+
+#if 0  /* strerror - VERY system-dependent.  */
+{
+  extern CONST unsigned int _sys_nerr;
+  extern CONST char *CONST _sys_errlist[];
+  int f;
+  it = "strerror";
+  f = open("/", O_WRONLY);	/* Should always fail. */
+  check(f < 0 && errno > 0 && errno < _sys_nerr);
+  equal(strerror(errno), _sys_errlist[errno]);
+}
+#endif
+}
+