test15.c

MINIX2.0操作系统源码 MINIX2.0操作系统源码

/* 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>

_PROTOTYPE( int chdir, (char *_path));		/* from <unistd.h> */

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

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

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

_PROTOTYPE(void check, (int thing, int number));
_PROTOTYPE(void equal, (char *a, char *b, int number));
_PROTOTYPE(int main, (int argc, char *argv []));
_PROTOTYPE(void first, (void));
_PROTOTYPE(void second, (void));
_PROTOTYPE(void quit, (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[];
{
  printf("Test 15 ");
  fflush(stdout);

  system("rm -rf DIR_15; mkdir DIR_15");
  chdir("DIR_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()
{