xref: /minix3/minix/tests/test15.c (revision 433d6423c39e34ec4b79c950597bb2d236f886be)

/* Test program for string(3) routines.
 *
 * Slightly modified from Henry Spencer's original routine.
 *   - incorporates semantic changes per the ANSI standard (original tests
 *     can be recovered by defining the symbol NOT_ANSI while compiling,
 *     except for the change of memcpy() to memmove()).
 *   - makes additional tests of functions on unaligned buffers and strings.
 */

#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>


#define	STREQ(a, b)	(strcmp((a), (b)) == 0)

char *it = "<UNSET>";		/* Routine name for message routines. */
int waserror = 0;		/* For exit status. */

char uctest[] = "\004\203";	/* For testing signedness of chars. */
int charsigned;			/* Result. */

int max_error = 2;
#include "common.h"


void check(int thing, int number);
void equal(char *a, char *b, int number);
int main(int argc, char *argv []);
void first(void);
void second(void);

/*
 - check - complain if condition is not true
 */
void check(thing, number)
int thing;
int number;			/* Test number for error message. */
{
  if (!thing) {
	printf("%s flunked test %d\n", it, number);
	waserror = 1;
	errct++;
  }
}

/*
 - equal - complain if first two args don't strcmp as equal
 */
void equal(a, b, number)
char *a;
char *b;
int number;			/* Test number for error message. */
{
  check(a != NULL && b != NULL && STREQ(a, b), number);
}

char one[50];
char two[50];

#ifdef UNIXERR
#define ERR 1
#endif
#ifdef BERKERR
#define ERR 1
#endif
#ifdef ERR
int f;
extern char *sys_errlist[];
extern int sys_nerr;
#endif

/* ARGSUSED */
int main(argc, argv)
int argc;
char *argv[];
{

  start(15);

  /* First, establish whether chars are signed. */
  if (uctest[0] < uctest[1])
	charsigned = 0;
  else
	charsigned = 1;

  /* Then, do the rest of the work.  Split into two functions because
   * some compilers get unhappy about a single immense function. */
  first();
  second();

  errct = waserror;
  quit();
  return(-1);			/* impossible */
}

void first()
{
  /* Test strcmp first because we use it to test other things. */
  it = "strcmp";
  check(strcmp("", "") == 0, 1);/* Trivial case. */
  check(strcmp("a", "a") == 0, 2);	/* Identity. */
  check(strcmp("abc", "abc") == 0, 3);	/* Multicharacter. */
  check(strcmp("abc", "abcd") < 0, 4);	/* Length mismatches. */
  check(strcmp("abcd", "abc") > 0, 5);
  check(strcmp("abcd", "abce") < 0, 6);	/* Honest miscompares. */
  check(strcmp("abce", "abcd") > 0, 7);
  check(strcmp("a\203", "a") > 0, 8);	/* Tricky if char signed. */

#ifdef NOT_ANSI
  if (charsigned)
	check(strcmp("a\203", "a\003") < 0, 9);
  else
	check(strcmp("a\203", "a\003") > 0, 9);
#else
  check(strcmp("a\203", "a\003") > 0, 9);
#endif

  check(strcmp("abcd" + 1, "abcd" + 1) == 0, 10);	/* Unaligned tests. */
  check(strcmp("abcd" + 1, "abce" + 1) < 0, 11);
  check(strcmp("abcd" + 1, "bcd") == 0, 12);
  check(strcmp("abce" + 1, "bcd") > 0, 13);
  check(strcmp("abcd" + 2, "bcd" + 1) == 0, 14);
  check(strcmp("abcd" + 2, "bce" + 1) < 0, 15);

  /* Test strcpy next because we need it to set up other tests. */
  it = "strcpy";
  check(strcpy(one, "abcd") == one, 1);	/* Returned value. */
  equal(one, "abcd", 2);	/* Basic test. */

  (void) strcpy(one, "x");
  equal(one, "x", 3);		/* Writeover. */
  equal(one + 2, "cd", 4);	/* Wrote too much? */

  (void) strcpy(two, "hi there");
  (void) strcpy(one, two);
  equal(one, "hi there", 5);	/* Basic test encore. */
  equal(two, "hi there", 6);	/* Stomped on source? */

  (void) strcpy(one, "");
  equal(one, "", 7);		/* Boundary condition. */

  (void) strcpy(one, "abcdef" + 1);	/* Unaligned tests. */
  equal(one, "bcdef", 8);
  (void) strcpy(one + 1, "*xy" + 1);
  equal(one, "bxy", 9);
  equal(one + 4, "f", 10);

  /* Strcat */
  it = "strcat";
  (void) strcpy(one, "ijk");
  check(strcat(one, "lmn") == one, 1);	/* Returned value. */
  equal(one, "ijklmn", 2);	/* Basic test. */

  (void) strcpy(one, "x");
  (void) strcat(one, "yz");
  equal(one, "xyz", 3);		/* Writeover. */
  equal(one + 4, "mn", 4);	/* Wrote too much? */

  (void) strcpy(one, "gh");
  (void) strcpy(two, "ef");
  (void) strcat(one, two);
  equal(one, "ghef", 5);	/* Basic test encore. */
  equal(two, "ef", 6);		/* Stomped on source? */

  (void) strcpy(one, "");
  (void) strcat(one, "");
  equal(one, "", 7);		/* Boundary conditions. */
  (void) strcpy(one, "ab");
  (void) strcat(one, "");
  equal(one, "ab", 8);
  (void) strcpy(one, "");
  (void) strcat(one, "cd");
  equal(one, "cd", 9);

  /* 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, 1);	/* Returned value. */
  equal(one, "ijklmn", 2);	/* Basic test. */

  (void) strcpy(one, "x");
  (void) strncat(one, "yz", 99);
  equal(one, "xyz", 3);		/* Writeover. */
  equal(one + 4, "mn", 4);	/* Wrote too much? */

  (void) strcpy(one, "gh");
  (void) strcpy(two, "ef");
  (void) strncat(one, two, 99);
  equal(one, "ghef", 5);	/* Basic test encore. */
  equal(two, "ef", 6);		/* Stomped on source? */

  (void) strcpy(one, "");
  (void) strncat(one, "", 99);
  equal(one, "", 7);		/* Boundary conditions. */
  (void) strcpy(one, "ab");
  (void) strncat(one, "", 99);
  equal(one, "ab", 8);
  (void) strcpy(one, "");
  (void) strncat(one, "cd", 99);
  equal(one, "cd", 9);

  (void) strcpy(one, "ab");
  (void) strncat(one, "cdef", 2);
  equal(one, "abcd", 10);	/* Count-limited. */

  (void) strncat(one, "gh", 0);
  equal(one, "abcd", 11);	/* Zero count. */

  (void) strncat(one, "gh", 2);
  equal(one, "abcdgh", 12);	/* Count and length equal. */

  (void) strcpy(one, "abcdefghij");	/* Unaligned tests. */
  (void) strcpy(one, "abcd");
  (void) strcpy(one, "abc");
  (void) strncat(one, "de" + 1, 1);
  equal(one, "abce", 13);
  equal(one + 4, "", 14);
  equal(one + 5, "fghij", 15);

  /* Strncmp - first test as strcmp with big counts, then test count code. */
  it = "strncmp";
  check(strncmp("", "", 99) == 0, 1);	/* Trivial case. */
  check(strncmp("a", "a", 99) == 0, 2);	/* Identity. */
  check(strncmp("abc", "abc", 99) == 0, 3);	/* Multicharacter. */
  check(strncmp("abc", "abcd", 99) < 0, 4);	/* Length unequal. */
  check(strncmp("abcd", "abc", 99) > 0, 5);
  check(strncmp("abcd", "abce", 99) < 0, 6);	/* Honestly unequal. */
  check(strncmp("abce", "abcd", 99) > 0, 7);
  check(strncmp("a\203", "a", 2) > 0, 8);	/* Tricky if '\203' < 0 */

#ifdef NOT_ANSI
  if (charsigned)
	check(strncmp("a\203", "a\003", 2) < 0, 9);
  else
	check(strncmp("a\203", "a\003", 2) > 0, 9);
#else
  check(strncmp("a\203", "a\003", 2) > 0, 9);
#endif

  check(strncmp("abce", "abcd", 3) == 0, 10);	/* Count limited. */
  check(strncmp("abce", "abc", 3) == 0, 11);	/* Count == length. */
  check(strncmp("abcd", "abce", 4) < 0, 12);	/* Nudging limit. */
  check(strncmp("abc", "def", 0) == 0, 13);	/* Zero count. */

  /* Strncpy - testing is a bit different because of odd semantics */
  it = "strncpy";
  check(strncpy(one, "abc", 4) == one, 1);	/* Returned value. */
  equal(one, "abc", 2);		/* Did the copy go right? */

  (void) strcpy(one, "abcdefgh");
  (void) strncpy(one, "xyz", 2);
  equal(one, "xycdefgh", 3);	/* Copy cut by count. */

  (void) strcpy(one, "abcdefgh");
  (void) strncpy(one, "xyz", 3);/* Copy cut just before NUL. */
  equal(one, "xyzdefgh", 4);

  (void) strcpy(one, "abcdefgh");
  (void) strncpy(one, "xyz", 4);/* Copy just includes NUL. */
  equal(one, "xyz", 5);
  equal(one + 4, "efgh", 6);	/* Wrote too much? */

  (void) strcpy(one, "abcdefgh");
  (void) strncpy(one, "xyz", 5);/* Copy includes padding. */
  equal(one, "xyz", 7);
  equal(one + 4, "", 8);
  equal(one + 5, "fgh", 9);

  (void) strcpy(one, "abc");
  (void) strncpy(one, "xyz", 0);/* Zero-length copy. */
  equal(one, "abc", 10);

  (void) strncpy(one, "", 2);	/* Zero-length source. */
  equal(one, "", 11);
  equal(one + 1, "", 12);
  equal(one + 2, "c", 13);

  (void) strcpy(one, "hi there");
  (void) strncpy(two, one, 9);
  equal(two, "hi there", 14);	/* Just paranoia. */
  equal(one, "hi there", 15);	/* Stomped on source? */

  /* Strlen */
  it = "strlen";
  check(strlen("") == 0, 1);	/* Empty. */
  check(strlen("a") == 1, 2);	/* Single char. */
  check(strlen("abcd") == 4, 3);/* Multiple chars. */
  check(strlen("abcd" + 1) == 3, 4);	/* Unaligned test. */

  /* Strchr */
  it = "strchr";
  check(strchr("abcd", 'z') == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check(strchr(one, 'c') == one + 2, 2);	/* Basic test. */
  check(strchr(one, 'd') == one + 3, 3);	/* End of string. */
  check(strchr(one, 'a') == one, 4);	/* Beginning. */
  check(strchr(one, '\0') == one + 4, 5);	/* Finding NUL. */
  (void) strcpy(one, "ababa");
  check(strchr(one, 'b') == one + 1, 6);	/* Finding first. */
  (void) strcpy(one, "");
  check(strchr(one, 'b') == NULL, 7);	/* Empty string. */
  check(strchr(one, '\0') == one, 8);	/* NUL in empty string. */

  /* Index - just like strchr */
  it = "index";
  check(index("abcd", 'z') == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check(index(one, 'c') == one + 2, 2);	/* Basic test. */
  check(index(one, 'd') == one + 3, 3);	/* End of string. */
  check(index(one, 'a') == one, 4);	/* Beginning. */
  check(index(one, '\0') == one + 4, 5);	/* Finding NUL. */
  (void) strcpy(one, "ababa");
  check(index(one, 'b') == one + 1, 6);	/* Finding first. */
  (void) strcpy(one, "");
  check(index(one, 'b') == NULL, 7);	/* Empty string. */
  check(index(one, '\0') == one, 8);	/* NUL in empty string. */

  /* Strrchr */
  it = "strrchr";
  check(strrchr("abcd", 'z') == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check(strrchr(one, 'c') == one + 2, 2);	/* Basic test. */
  check(strrchr(one, 'd') == one + 3, 3);	/* End of string. */
  check(strrchr(one, 'a') == one, 4);	/* Beginning. */
  check(strrchr(one, '\0') == one + 4, 5);	/* Finding NUL. */
  (void) strcpy(one, "ababa");
  check(strrchr(one, 'b') == one + 3, 6);	/* Finding last. */
  (void) strcpy(one, "");
  check(strrchr(one, 'b') == NULL, 7);	/* Empty string. */
  check(strrchr(one, '\0') == one, 8);	/* NUL in empty string. */

  /* Rindex - just like strrchr */
  it = "rindex";
  check(rindex("abcd", 'z') == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check(rindex(one, 'c') == one + 2, 2);	/* Basic test. */
  check(rindex(one, 'd') == one + 3, 3);	/* End of string. */
  check(rindex(one, 'a') == one, 4);	/* Beginning. */
  check(rindex(one, '\0') == one + 4, 5);	/* Finding NUL. */
  (void) strcpy(one, "ababa");
  check(rindex(one, 'b') == one + 3, 6);	/* Finding last. */
  (void) strcpy(one, "");
  check(rindex(one, 'b') == NULL, 7);	/* Empty string. */
  check(rindex(one, '\0') == one, 8);	/* NUL in empty string. */
}

void second()
{
  /* Strpbrk - somewhat like strchr */
  it = "strpbrk";
  check(strpbrk("abcd", "z") == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check(strpbrk(one, "c") == one + 2, 2);	/* Basic test. */
  check(strpbrk(one, "d") == one + 3, 3);	/* End of string. */
  check(strpbrk(one, "a") == one, 4);	/* Beginning. */
  check(strpbrk(one, "") == NULL, 5);	/* Empty search list. */
  check(strpbrk(one, "cb") == one + 1, 6);	/* Multiple search. */
  (void) strcpy(one, "abcabdea");
  check(strpbrk(one, "b") == one + 1, 7);	/* Finding first. */
  check(strpbrk(one, "cb") == one + 1, 8);	/* With multiple search. */
  check(strpbrk(one, "db") == one + 1, 9);	/* Another variant. */
  (void) strcpy(one, "");
  check(strpbrk(one, "bc") == NULL, 10);	/* Empty string. */
  check(strpbrk(one, "") == NULL, 11);	/* Both strings empty. */

  /* Strstr - somewhat like strchr */
  it = "strstr";
  check(strstr("abcd", "z") == NULL, 1);	/* Not found. */
  check(strstr("abcd", "abx") == NULL, 2);	/* Dead end. */
  (void) strcpy(one, "abcd");
  check(strstr(one, "c") == one + 2, 3);	/* Basic test. */
  check(strstr(one, "bc") == one + 1, 4);	/* Multichar. */
  check(strstr(one, "d") == one + 3, 5);	/* End of string. */
  check(strstr(one, "cd") == one + 2, 6);	/* Tail of string. */
  check(strstr(one, "abc") == one, 7);	/* Beginning. */
  check(strstr(one, "abcd") == one, 8);	/* Exact match. */
  check(strstr(one, "abcde") == NULL, 9);	/* Too long. */
  check(strstr(one, "de") == NULL, 10);	/* Past end. */
#ifdef NOT_ANSI
  check(strstr(one, "") == one + 4, 11);	/* Finding empty. */
#else
  check(strstr(one, "") == one, 11);	/* Finding empty. */
#endif
  (void) strcpy(one, "ababa");
  check(strstr(one, "ba") == one + 1, 12);	/* Finding first. */
  (void) strcpy(one, "");
  check(strstr(one, "b") == NULL, 13);	/* Empty string. */
  check(strstr(one, "") == one, 14);	/* Empty in empty string. */
  (void) strcpy(one, "bcbca");
  check(strstr(one, "bca") == one + 2, 15);	/* False start. */
  (void) strcpy(one, "bbbcabbca");
  check(strstr(one, "bbca") == one + 1, 16);	/* With overlap. */

  /* Strspn */
  it = "strspn";
  check(strspn("abcba", "abc") == 5, 1);	/* Whole string. */
  check(strspn("abcba", "ab") == 2, 2);	/* Partial. */
  check(strspn("abc", "qx") == 0, 3);	/* None. */
  check(strspn("", "ab") == 0, 4);	/* Null string. */
  check(strspn("abc", "") == 0, 5);	/* Null search list. */

  /* Strcspn */
  it = "strcspn";
  check(strcspn("abcba", "qx") == 5, 1);	/* Whole string. */
  check(strcspn("abcba", "cx") == 2, 2);	/* Partial. */
  check(strcspn("abc", "abc") == 0, 3);	/* None. */
  check(strcspn("", "ab") == 0, 4);	/* Null string. */
  check(strcspn("abc", "") == 3, 5);	/* Null search list. */

  /* Strtok - the hard one */
  it = "strtok";
  (void) strcpy(one, "first, second, third");
  equal(strtok(one, ", "), "first", 1);	/* Basic test. */
  equal(one, "first", 2);
  equal(strtok((char *) NULL, ", "), "second", 3);
  equal(strtok((char *) NULL, ", "), "third", 4);
  check(strtok((char *) NULL, ", ") == NULL, 5);
  (void) strcpy(one, ", first, ");
  equal(strtok(one, ", "), "first", 6);	/* Extra delims, 1 tok. */
  check(strtok((char *) NULL, ", ") == NULL, 7);
  (void) strcpy(one, "1a, 1b; 2a, 2b");
  equal(strtok(one, ", "), "1a", 8);	/* Changing delim lists. */
  equal(strtok((char *) NULL, "; "), "1b", 9);
  equal(strtok((char *) NULL, ", "), "2a", 10);
  (void) strcpy(two, "x-y");
  equal(strtok(two, "-"), "x", 11);	/* New string before done. */
  equal(strtok((char *) NULL, "-"), "y", 12);
  check(strtok((char *) NULL, "-") == NULL, 13);
  (void) strcpy(one, "a,b, c,, ,d");
  equal(strtok(one, ", "), "a", 14);	/* Different separators. */
  equal(strtok((char *) NULL, ", "), "b", 15);
  equal(strtok((char *) NULL, " ,"), "c", 16);	/* Permute list too. */
  equal(strtok((char *) NULL, " ,"), "d", 17);
  check(strtok((char *) NULL, ", ") == NULL, 18);
  check(strtok((char *) NULL, ", ") == NULL, 19);	/* Persistence. */
  (void) strcpy(one, ", ");
  check(strtok(one, ", ") == NULL, 20);	/* No tokens. */
  (void) strcpy(one, "");
  check(strtok(one, ", ") == NULL, 21);	/* Empty string. */
  (void) strcpy(one, "abc");
  equal(strtok(one, ", "), "abc", 22);	/* No delimiters. */
  check(strtok((char *) NULL, ", ") == NULL, 23);
  (void) strcpy(one, "abc");
  equal(strtok(one, ""), "abc", 24);	/* Empty delimiter list. */
  check(strtok((char *) NULL, "") == NULL, 25);
  (void) strcpy(one, "abcdefgh");
  (void) strcpy(one, "a,b,c");
  equal(strtok(one, ","), "a", 26);	/* Basics again... */
  equal(strtok((char *) NULL, ","), "b", 27);
  equal(strtok((char *) NULL, ","), "c", 28);
  check(strtok((char *) NULL, ",") == NULL, 29);
  equal(one + 6, "gh", 30);	/* Stomped past end? */
  equal(one, "a", 31);		/* Stomped old tokens? */
  equal(one + 2, "b", 32);
  equal(one + 4, "c", 33);

  /* Memcmp */
  it = "memcmp";
  check(memcmp("a", "a", 1) == 0, 1);	/* Identity. */
  check(memcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
  check(memcmp("abcd", "abce", 4) < 0, 3);	/* Honestly unequal. */
  check(memcmp("abce", "abcd", 4) > 0, 4);
  check(memcmp("alph", "beta", 4) < 0, 5);

#ifdef NOT_ANSI
  if (charsigned)
	check(memcmp("a\203", "a\003", 2) < 0, 6);
  else
	check(memcmp("a\203", "a\003", 2) > 0, 6);
#else
  check(memcmp("a\203", "a\003", 2) > 0, 6);
#endif

  check(memcmp("abce", "abcd", 3) == 0, 7);	/* Count limited. */
  check(memcmp("abc", "def", 0) == 0, 8);	/* Zero count. */

  check(memcmp("a" + 1, "a" + 1, 1) == 0, 9);	/* Unaligned tests. */
  check(memcmp("abc" + 1, "bc", 2) == 0, 10);
  check(memcmp("bc", "abc" + 1, 2) == 0, 11);
  check(memcmp("abcd" + 1, "abce" + 1, 3) < 0, 12);
  check(memcmp("abce" + 1, "abcd" + 1, 3) > 0, 13);
/*
  check(memcmp("a\203" + 1, "a\003" + 1, 1) > 0, 14);
*/
  check(memcmp("abcde" + 1, "abcdf" + 1, 3) == 0, 15);

  /* Memchr */
  it = "memchr";
  check(memchr("abcd", 'z', 4) == NULL, 1);	/* Not found. */
  (void) strcpy(one, "abcd");
  check( (char *)memchr(one, 'c', 4) == one + 2, 2);	/* Basic test. */
  check( (char *)memchr(one, 'd', 4) == one + 3, 3);	/* End of string. */
  check( (char *)memchr(one, 'a', 4) == one, 4);	/* Beginning. */
  check( (char *)memchr(one, '\0', 5) == one + 4, 5);	/* Finding NUL. */
  (void) strcpy(one, "ababa");
  check( (char *)memchr(one, 'b', 5) == one + 1, 6);	/* Finding first. */
  check( (char *)memchr(one, 'b', 0) == NULL, 7);	/* Zero count. */
  check( (char *)memchr(one, 'a', 1) == one, 8);	/* Singleton case. */
  (void) strcpy(one, "a\203b");
  check( (char *)memchr(one, 0203, 3) == one + 1, 9);	/* Unsignedness. */

  /* Memcpy
   * Note that X3J11 says memcpy may fail on overlap. */
  it = "memcpy";
  check( (char *)memcpy(one, "abc", 4) == one, 1);	/* Returned value. */
  equal(one, "abc", 2);		/* Did the copy go right? */

  (void) strcpy(one, "abcdefgh");
  (void) memcpy(one + 1, "xyz", 2);
  equal(one, "axydefgh", 3);	/* Basic test. */

  (void) strcpy(one, "abc");
  (void) memcpy(one, "xyz", 0);
  equal(one, "abc", 4);		/* Zero-length copy. */

  (void) strcpy(one, "hi there");
  (void) strcpy(two, "foo");
  (void) memcpy(two, one, 9);
  equal(two, "hi there", 5);	/* Just paranoia. */
  equal(one, "hi there", 6);	/* Stomped on source? */

  (void) strcpy(one, "abcde");	/* Unaligned tests. */
  (void) memcpy(one + 1, "\0\0\0\0\0", 1);
  equal(one, "a", 7);
  equal(one + 2, "cde", 8);
  (void) memcpy(one + 1, "xyz" + 1, 2);
  equal(one, "ayzde", 9);
  (void) memcpy(one + 1, "xyz" + 1, 3);
  equal(one, "ayz", 10);

  /* Memmove
   * Note that X3J11 says memmove must work regardless of overlap. */
  it = "memmove";
  check( (char *)memmove(one, "abc", 4) == one, 1);	/* Returned value. */
  equal(one, "abc", 2);		/* Did the copy go right? */

  (void) strcpy(one, "abcdefgh");
  (void) memmove(one + 1, "xyz", 2);
  equal(one, "axydefgh", 3);	/* Basic test. */

  (void) strcpy(one, "abc");
  (void) memmove(one, "xyz", 0);
  equal(one, "abc", 4);		/* Zero-length copy. */

  (void) strcpy(one, "hi there");
  (void) strcpy(two, "foo");
  (void) memmove(two, one, 9);
  equal(two, "hi there", 5);	/* Just paranoia. */
  equal(one, "hi there", 6);	/* Stomped on source? */

  (void) strcpy(one, "abcdefgh");
  (void) memmove(one + 1, one, 9);
  equal(one, "aabcdefgh", 7);	/* Overlap, right-to-left. */

  (void) strcpy(one, "abcdefgh");
  (void) memmove(one + 1, one + 2, 7);
  equal(one, "acdefgh", 8);	/* Overlap, left-to-right. */

  (void) strcpy(one, "abcdefgh");
  (void) memmove(one, one, 9);
  equal(one, "abcdefgh", 9);	/* 100% overlap. */

  (void) strcpy(one, "abcde");	/* Unaligned tests. */
  (void) memmove(one + 1, "\0\0\0\0\0", 1);
  equal(one, "a", 10);
  equal(one + 2, "cde", 11);
  (void) memmove(one + 1, "xyz" + 1, 2);
  equal(one, "ayzde", 12);
  (void) memmove(one + 1, "xyz" + 1, 3);
  equal(one, "ayz", 13);
  (void) strcpy(one, "abcdefgh");
  (void) memmove(one + 2, one + 1, 8);
  equal(one, "abbcdefgh", 14);

  /* 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, 1);	/* Returned value. */
  equal(one, "abc", 2);		/* Did the copy go right? */

  (void) strcpy(one, "abcdefgh");
  (void) memccpy(one + 1, "xyz", 'q', 2);
  equal(one, "axydefgh", 3);	/* Basic test. */

  (void) strcpy(one, "abc");
  (void) memccpy(one, "xyz", 'q', 0);
  equal(one, "abc", 4);		/* Zero-length copy. */

  (void) strcpy(one, "hi there");
  (void) strcpy(two, "foo");
  (void) memccpy(two, one, 'q', 9);
  equal(two, "hi there", 5);	/* Just paranoia. */
  equal(one, "hi there", 6);	/* Stomped on source? */

  (void) strcpy(one, "abcdefgh");
  (void) strcpy(two, "horsefeathers");
  check( (char *)memccpy(two, one, 'f', 9) == two + 6, 7);/* Returned value. */
  equal(one, "abcdefgh", 8);	/* Source intact? */
  equal(two, "abcdefeathers", 9);	/* Copy correct? */

  (void) strcpy(one, "abcd");
  (void) strcpy(two, "bumblebee");
  check((char *)memccpy(two, one, 'a', 4) == two + 1, 10);    /* First char. */
  equal(two, "aumblebee", 11);
  check((char *)memccpy(two, one, 'd', 4) == two + 4, 12);     /* Last char. */
  equal(two, "abcdlebee", 13);
  (void) strcpy(one, "xyz");
  check((char *)memccpy(two, one, 'x', 1) == two + 1, 14);     /* Singleton. */
  equal(two, "xbcdlebee", 15);

  /* Memset */
  it = "memset";
  (void) strcpy(one, "abcdefgh");
  check( (char *) memset(one + 1, 'x', 3) == one + 1, 1);   /* Return value. */
  equal(one, "axxxefgh", 2);	/* Basic test. */

  (void) memset(one + 2, 'y', 0);
  equal(one, "axxxefgh", 3);	/* Zero-length set. */

  (void) memset(one + 5, 0, 1);
  equal(one, "axxxe", 4);	/* Zero fill. */
  equal(one + 6, "gh", 5);	/* And the leftover. */

  (void) memset(one + 2, 010045, 1);
  equal(one, "ax\045xe", 6);	/* 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", 1);		/* Simple copy. */

  (void) strcpy(one, "abcdefgh");
  (void) bcopy("xyz", one + 1, 2);
  equal(one, "axydefgh", 2);	/* Basic test. */

  (void) strcpy(one, "abc");
  (void) bcopy("xyz", one, 0);
  equal(one, "abc", 3);		/* Zero-length copy. */

  (void) strcpy(one, "hi there");
  (void) strcpy(two, "foo");
  (void) bcopy(one, two, 9);
  equal(two, "hi there", 4);	/* Just paranoia. */
  equal(one, "hi there", 5);	/* Stomped on source? */

  /* Bzero */
  it = "bzero";
  (void) strcpy(one, "abcdef");
  bzero(one + 2, 2);
  equal(one, "ab", 1);		/* Basic test. */
  equal(one + 3, "", 2);
  equal(one + 4, "ef", 3);

  (void) strcpy(one, "abcdef");
  bzero(one + 2, 0);
  equal(one, "abcdef", 4);	/* Zero-length copy. */

  /* Bcmp - somewhat like memcmp */
  it = "bcmp";
  check(bcmp("a", "a", 1) == 0, 1);	/* Identity. */
  check(bcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
  check(bcmp("abcd", "abce", 4) != 0, 3);	/* Honestly unequal. */
  check(bcmp("abce", "abcd", 4) != 0, 4);
  check(bcmp("alph", "beta", 4) != 0, 5);
  check(bcmp("abce", "abcd", 3) == 0, 6);	/* Count limited. */
  check(bcmp("abc", "def", 0) == 0, 8);	/* Zero count. */

#ifdef ERR
  /* Strerror - VERY system-dependent */
  it = "strerror";
  f = open("/", O_WRONLY);	/* Should always fail. */
  check(f < 0 && errno > 0 && errno < sys_nerr, 1);
  equal(strerror(errno), sys_errlist[errno], 2);
#ifdef UNIXERR
  equal(strerror(errno), "Is a directory", 3);
#endif
#ifdef BERKERR
  equal(strerror(errno), "Permission denied", 3);
#endif
#endif
}