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glibc  2.9
Defines | Typedefs | Functions
test-memmove.c File Reference
#include "test-string.h"
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_MAIN

Typedefs

typedef char *(* proto_t )(char *, const char *, size_t)

Functions

char * simple_memmove (char *, const char *, size_t)
static void do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, size_t len)
static void do_test (size_t align1, size_t align2, size_t len)
static void do_random_tests (void)
int test_main (void)

Define Documentation

#define TEST_MAIN

Definition at line 21 of file test-memmove.c.


Typedef Documentation

typedef char*(* proto_t)(char *, const char *, size_t)

Definition at line 24 of file test-memmove.c.


Function Documentation

static void do_one_test ( impl_t impl,
char *  dst,
char *  src,
const char *  orig_src,
size_t  len 
) [static]

Definition at line 48 of file test-memmove.c.

{
  char *res;

  memcpy (src, orig_src, len);
  res = CALL (impl, dst, src, len);
  if (res != dst)
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
            res, dst);
      ret = 1;
      return;
    }

  if (memcmp (dst, orig_src, len) != 0)
    {
      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
            impl->name, dst, src);
      ret = 1;
      return;
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute ((unused));
      hp_timing_t stop __attribute ((unused));
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
       {
         HP_TIMING_NOW (start);
         CALL (impl, dst, src, len);
         HP_TIMING_NOW (stop);
         HP_TIMING_BEST (best_time, start, stop);
       }

      printf ("\t%zd", (size_t) best_time);
    }
}

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static void do_random_tests ( void  ) [static]

Definition at line 121 of file test-memmove.c.

{
  size_t i, n, align1, align2, len, size;
  size_t srcstart, srcend, dststart, dstend;
  int c;
  unsigned char *p1, *p2;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      if ((random () & 255) == 0)
       size = 65536;
      else
       size = 512;
      if (size > page_size)
       size = page_size;
      if ((random () & 3) == 0)
       {
         len = random () & (size - 1);
         align1 = size - len - (random () & 31);
         align2 = size - len - (random () & 31);
         if (align1 > size)
           align1 = 0;
         if (align2 > size)
           align2 = 0;
       }
      else
       {
         align1 = random () & (size / 2 - 1);
         align2 = random () & (size / 2 - 1);
         len = random () & (size - 1);
         if (align1 + len > size)
           align1 = size - len;
         if (align2 + len > size)
           align2 = size - len;
       }

      p1 = buf1 + page_size - size;
      p2 = buf2 + page_size - size;
      c = random () & 255;
      srcend = align1 + len + 256;
      if (srcend > size)
       srcend = size;
      if (align1 > 256)
       srcstart = align1 - 256;
      else
       srcstart = 0;
      for (i = srcstart; i < srcend; ++i)
       p1[i] = random () & 255;
      dstend = align2 + len + 256;
      if (dstend > size)
       dstend = size;
      if (align2 > 256)
       dststart = align2 - 256;
      else
       dststart = 0;

      FOR_EACH_IMPL (impl, 1)
       {
         memset (p2 + dststart, c, dstend - dststart);
         memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
         res = (unsigned char *) CALL (impl,
                                   (char *) (p2 + align2),
                                   (char *) (p2 + align1), len);
         if (res != p2 + align2)
           {
             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
                   n, impl->name, align1, align2, len, res, p2 + align2);
             ret = 1;
           }
         if (memcmp (p1 + align1, p2 + align2, len))
           {
             error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
                   n, impl->name, align1, align2, len);
             ret = 1;
           }
         for (i = dststart; i < dstend; ++i)
           {
             if (i >= align2 && i < align2 + len)
              {
                i = align2 + len - 1;
                continue;
              }
             if (i >= srcstart && i < srcend)
              {
                i = srcend - 1;
                continue;
              }
             if (p2[i] != c)
              {
                error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
                      n, impl->name, align1, align2, len);
                ret = 1;
                break;
              }
           }

         if (srcstart < align2
             && memcmp (p2 + srcstart, p1 + srcstart,
                      (srcend > align2 ? align2 : srcend) - srcstart))
           {
             error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
                   n, impl->name, align1, align2, len);
             ret = 1;
             break;
           }

         i = srcstart > align2 + len ? srcstart : align2 + len;
         if (srcend > align2 + len
             && memcmp (p2 + i, p1 + i, srcend - i))
           {
             error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
                   n, impl->name, align1, align2, len);
             ret = 1;
             break;
           }
       }
    }
}

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static void do_test ( size_t  align1,
size_t  align2,
size_t  len 
) [static]

Definition at line 91 of file test-memmove.c.

{
  size_t i, j;
  char *s1, *s2;

  align1 &= 63;
  if (align1 + len >= page_size)
    return;

  align2 &= 63;
  if (align2 + len >= page_size)
    return;

  s1 = (char *) (buf1 + align1);
  s2 = (char *) (buf2 + align2);

  for (i = 0, j = 1; i < len; i++, j += 23)
    s1[i] = j;

  if (HP_TIMING_AVAIL)
    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);

  if (HP_TIMING_AVAIL)
    putchar ('\n');
}

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char * simple_memmove ( char *  dst,
const char *  src,
size_t  n 
)

Definition at line 31 of file test-memmove.c.

{
  char *ret = dst;
  if (src < dst)
    {
      dst += n;
      src += n;
      while (n--)
       *--dst = *--src;
    }
  else
    while (n--)
      *dst++ = *src++;
  return ret;
}
int test_main ( void  )

Definition at line 242 of file test-memmove.c.

{
  size_t i;

  test_init ();

  printf ("%23s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 0; i < 14; ++i)
    {
      do_test (0, 32, 1 << i);
      do_test (32, 0, 1 << i);
      do_test (0, i, 1 << i);
      do_test (i, 0, 1 << i);
    }

  for (i = 0; i < 32; ++i)
    {
      do_test (0, 32, i);
      do_test (32, 0, i);
      do_test (0, i, i);
      do_test (i, 0, i);
    }

  for (i = 3; i < 32; ++i)
    {
      if ((i & (i - 1)) == 0)
       continue;
      do_test (0, 32, 16 * i);
      do_test (32, 0, 16 * i);
      do_test (0, i, 16 * i);
      do_test (i, 0, 16 * i);
    }

  do_random_tests ();
  return ret;
}

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