tstring.c

Newlib 嵌入式 C库 标准实现代码

/*
 * Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * is freely granted, provided that this notice is preserved.
 */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#ifndef MAX_1
#ifdef __SPU__
#define MAX_1 11000
#else
#define MAX_1 33000
#endif
#endif

#define MAX_2 (2 * MAX_1 + MAX_1 / 10)

void eprintf (int line, char *result, char *expected, int size)
{
  if (size != 0)
    printf ("Failure at line %d, result is <%.*s>, should be <%s> of size %d\n",
             line, size, result, expected, size);
  else
    printf ("Failure at line %d, result is <%s>, should be <%s>\n",
             line, result, expected);
}

void mycopy (char *target, char *source, int size)
{
  int i;

  for (i = 0; i < size; ++i)
    {
      target[i] = source[i];
    }
}

void myset (char *target, char ch, int size)
{
  int i;
  
  for (i = 0; i < size; ++i)
    {
      target[i] = ch;
    }
}

int main()
{
  char target[MAX_1] = "A";
  char first_char;
  char second_char;
  char array[] = "abcdefghijklmnopqrstuvwxz";
  char array2[] = "0123456789!@#$%^&*(";
  char buffer2[MAX_1];
  char buffer3[MAX_1];
  char buffer4[MAX_1];
  char buffer5[MAX_2];
  char buffer6[MAX_2];
  char buffer7[MAX_2];
  char expected[MAX_1];
  char *tmp1, *tmp2, *tmp3, *tmp4, *tmp5, *tmp6, *tmp7;
  int i, j, k, x, z, align_test_iterations;

  int test_failed = 0;

  tmp1 = target;
  tmp2 = buffer2;
  tmp3 = buffer3;
  tmp4 = buffer4;
  tmp5 = buffer5;
  tmp6 = buffer6;
  tmp7 = buffer7;

  tmp2[0] = 'Z';
  tmp2[1] = '\0';

  if (memset (target, 'X', 0) != target ||
      memcpy (target, "Y", 0) != target ||
      memmove (target, "K", 0) != target ||
      strncpy (tmp2, "4", 0) != tmp2 ||
      strncat (tmp2, "123", 0) != tmp2 ||
      strcat (target, "") != target)
    {
      eprintf (__LINE__, target, "A", 0);
      test_failed = 1;
    }

  if (strcmp (target, "A") || strlen(target) != 1 || memchr (target, 'A', 0) != NULL
      || memcmp (target, "J", 0) || strncmp (target, "A", 1) || strncmp (target, "J", 0) ||
      tmp2[0] != 'Z' || tmp2[1] != '\0')
    {
      eprintf (__LINE__, target, "A", 0);
      test_failed = 1;
    }

  tmp2[2] = 'A';
  if (strcpy (target, "") != target ||
      strncpy (tmp2, "", 4) != tmp2 ||
      strcat (target, "") != target)
    {
      eprintf (__LINE__, target, "", 0);
      test_failed = 1;
    }

  if (target[0] != '\0' || strncmp (target, "", 1) ||
      memcmp (tmp2, "\0\0\0\0", 4))
    {
      eprintf (__LINE__, target, "", 0);
      test_failed = 1;
    }

  tmp2[2] = 'A';
  if (strncat (tmp2, "1", 3) != tmp2 ||
      memcmp (tmp2, "1\0A", 3))
    {
      eprintf (__LINE__, tmp2, "1\0A", 3);
      test_failed = 1;
    }

  if (strcpy (tmp3, target) != tmp3 ||
      strcat (tmp3, "X") != tmp3 ||
      strncpy (tmp2, "X", 2) != tmp2 ||
      memset (target, tmp2[0], 1) != target)
    {
      eprintf (__LINE__, target, "X", 0);
      test_failed = 1;
    }

  if (strcmp (target, "X") || strlen (target) != 1 ||
      memchr (target, 'X', 2) != target ||
      strchr (target, 'X') != target ||
      memchr (target, 'Y', 2) != NULL ||
      strchr (target, 'Y') != NULL ||
      strcmp (tmp3, target) ||
      strncmp (tmp3, target, 2) ||
      memcmp (target, "K", 0) ||
      strncmp (target, tmp3, 3))
    {
      eprintf (__LINE__, target, "X", 0);
      test_failed = 1;
    }

  if (strcpy (tmp3, "Y") != tmp3 ||
      strcat (tmp3, "Y") != tmp3 ||
      memset (target, 'Y', 2) != target)
    {
      eprintf (__LINE__, target, "Y", 0);
      test_failed = 1;
    }

  target[2] = '\0';
  if (memcmp (target, "YY", 2) || strcmp (target, "YY") ||
      strlen (target) != 2 || memchr (target, 'Y', 2) != target ||
      strcmp (tmp3, target) ||
      strncmp (target, tmp3, 3) ||
      strncmp (target, tmp3, 4) ||
      strncmp (target, tmp3, 2) ||
      strchr (target, 'Y') != target)
    {
      eprintf (__LINE__, target, "YY", 2);
      test_failed = 1;
    }

  strcpy (target, "WW");
  if (memcmp (target, "WW", 2) || strcmp (target, "WW") ||
      strlen (target) != 2 || memchr (target, 'W', 2) != target ||
      strchr (target, 'W') != target)
    {
      eprintf (__LINE__, target, "WW", 2);
      test_failed = 1;
    }

  if (strncpy (target, "XX", 16) != target ||
      memcmp (target, "XX\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16))
    {
      eprintf (__LINE__, target, "XX\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16);
      test_failed = 1;
    }

  if (strcpy (tmp3, "ZZ") != tmp3 ||
      strcat (tmp3, "Z") != tmp3 ||
      memcpy (tmp4, "Z", 2) != tmp4 ||
      strcat (tmp4, "ZZ") != tmp4 ||
      memset (target, 'Z', 3) != target)
    {
      eprintf (__LINE__, target, "ZZZ", 3);
      test_failed = 1;
    }

  target[3] = '\0';
  tmp5[0] = '\0';
  strncat (tmp5, "123", 2);
  if (memcmp (target, "ZZZ", 3) || strcmp (target, "ZZZ") ||
      strcmp (tmp3, target) || strcmp (tmp4, target) ||
      strncmp (target, "ZZZ", 4) || strncmp (target, "ZZY", 3) <= 0 ||
      strncmp ("ZZY", target, 4) >= 0 ||
      memcmp (tmp5, "12", 3) ||
      strlen (target) != 3)
    {
      eprintf (__LINE__, target, "ZZZ", 3);
      test_failed = 1;
    }

  target[2] = 'K';
  if (memcmp (target, "ZZZ", 2) || strcmp (target, "ZZZ") >= 0 ||
      memcmp (target, "ZZZ", 3) >= 0 || strlen (target) != 3 ||
      memchr (target, 'K', 3) != target + 2 ||
      strncmp (target, "ZZZ", 2) || strncmp (target, "ZZZ", 4) >= 0 ||
      strchr (target, 'K') != target + 2)
    {
      eprintf (__LINE__, target, "ZZK", 3);
      test_failed = 1;
    }
  
  strcpy (target, "AAA");
  if (memcmp (target, "AAA", 3) || strcmp (target, "AAA") ||
      strncmp (target, "AAA", 3) ||
      strlen (target) != 3)
    {
      eprintf (__LINE__, target, "AAA", 3);
      test_failed = 1;
    }
  
  j = 5;
  while (j < MAX_1)
    {
      for (i = j-1; i <= j+1; ++i)
        {
	  /* don't bother checking unaligned data in the larger
	     sizes since it will waste time without performing additional testing */
	  if (i <= 16 * sizeof(long))
	    {
	      align_test_iterations = 2*sizeof(long);
              if (i <= 2 * sizeof(long) + 1)
                z = 2;
	      else
	        z = 2 * sizeof(long);
            }
	  else
            {
	      align_test_iterations = 1;
            }

	  for (x = 0; x < align_test_iterations; ++x)
	    {
	      tmp1 = target + x;
	      tmp2 = buffer2 + x;
	      tmp3 = buffer3 + x;
	      tmp4 = buffer4 + x;
	      tmp5 = buffer5 + x;
	      tmp6 = buffer6 + x;

	      first_char = array[i % (sizeof(array) - 1)];
	      second_char = array2[i % (sizeof(array2) - 1)];
	      memset (tmp1, first_char, i);
	      mycopy (tmp2, tmp1, i);
	      myset (tmp2 + z, second_char, i - z - 1);
	      if (memcpy (tmp1 + z, tmp2 + z, i - z - 1) != tmp1 + z)
		{
		  printf ("error at line %d\n", __LINE__);
		  test_failed = 1;
		}

	      tmp1[i] = '\0';
	      tmp2[i] = '\0';
	      if (strcpy (expected, tmp2) != expected)
		{
		  printf ("error at line %d\n", __LINE__);
		  test_failed = 1;
		}
	      tmp2[i-z] = first_char + 1;
	      if (memmove (tmp2 + z + 1, tmp2 + z, i - z - 1) != tmp2 + z + 1 ||
		  memset (tmp3, first_char, i) != tmp3)
		{
		  printf ("error at line %d\n", __LINE__);
		  test_failed = 1;
		}

	      myset (tmp4, first_char, i);
	      tmp5[0] = '\0';
	      if (strncpy (tmp5, tmp1, i+1) != tmp5 ||
		  strcat (tmp5, tmp1) != tmp5)
		{
		  printf ("error at line %d\n", __LINE__);
		  test_failed = 1;
		}
	      mycopy (tmp6, tmp1, i);
	      mycopy (tmp6 + i, tmp1, i + 1);

	      tmp7[2*i+z] = second_char;
              strcpy (tmp7, tmp1);
         
	      strchr (tmp1, second_char);
 
	      if (memcmp (tmp1, expected, i) || strcmp (tmp1, expected) ||
		  strncmp (tmp1, expected, i) ||
                  strncmp (tmp1, expected, i+1) ||
		  strcmp (tmp1, tmp2) >= 0 || memcmp (tmp1, tmp2, i) >= 0 ||
		  strncmp (tmp1, tmp2, i+1) >= 0 ||
		  strlen (tmp1) != i || memchr (tmp1, first_char, i) != tmp1 ||
		  strchr (tmp1, first_char) != tmp1 ||
		  memchr (tmp1, second_char, i) != tmp1 + z ||
		  strchr (tmp1, second_char) != tmp1 + z ||
		  strcmp (tmp5, tmp6) ||
		  strncat (tmp7, tmp1, i+2) != tmp7 ||
		  strcmp (tmp7, tmp6) ||
		  tmp7[2*i+z] != second_char)
		{
		  eprintf (__LINE__, tmp1, expected, 0);
		  printf ("x is %d\n",x);
		  printf ("i is %d\n", i);
		  printf ("tmp1 is <%p>\n", tmp1);
		  printf ("tmp5 is <%p> <%s>\n", tmp5, tmp5);
		  printf ("tmp6 is <%p> <%s>\n", tmp6, tmp6);
		  test_failed = 1;
		}

	      for (k = 1; k <= align_test_iterations && k <= i; ++k)
		{
		  if (memcmp (tmp3, tmp4, i - k + 1) != 0 ||
		      strncmp (tmp3, tmp4, i - k + 1) != 0)
		    {
		      printf ("Failure at line %d, comparing %.*s with %.*s\n",
			      __LINE__, i, tmp3, i, tmp4);
		      test_failed = 1;
		    }
		  tmp4[i-k] = first_char + 1;
		  if (memcmp (tmp3, tmp4, i) >= 0 ||
		      strncmp (tmp3, tmp4, i) >= 0 ||
		      memcmp (tmp4, tmp3, i) <= 0 ||
		      strncmp (tmp4, tmp3, i) <= 0)
		    {
		      printf ("Failure at line %d, comparing %.*s with %.*s\n",
			      __LINE__, i, tmp3, i, tmp4);
		      test_failed = 1;
		    }
		  tmp4[i-k] = first_char;
		}
	    }              
        }
      j = ((2 * j) >> 2) << 2;
    }

  if (test_failed)
    abort();
  else
    exit(0);
}