Back to index

glibc  2.9
Defines | Typedefs | Functions
test-memchr.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 )(const char *, int, size_t)

Functions

char * simple_memchr (const char *, int, size_t)
static void do_one_test (impl_t *impl, const char *s, int c, size_t n, char *exp_res)
static void do_test (size_t align, size_t pos, size_t len, int seek_char)
static void do_random_tests (void)
int test_main (void)

Define Documentation

#define TEST_MAIN

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


Typedef Documentation

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

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


Function Documentation

static void do_one_test ( impl_t impl,
const char *  s,
int  c,
size_t  n,
char *  exp_res 
) [static]

Definition at line 40 of file test-memchr.c.

{
  char *res = CALL (impl, s, c, n);
  if (res != exp_res)
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
            res, exp_res);
      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, s, c, n);
         HP_TIMING_NOW (stop);
         HP_TIMING_BEST (best_time, start, stop);
       }

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

Here is the call graph for this function:

static void do_random_tests ( void  ) [static]

Definition at line 111 of file test-memchr.c.

{
  size_t i, j, n, align, pos, len;
  int seek_char;
  char *result;
  unsigned char *p = buf1 + page_size - 512;

  for (n = 0; n < ITERATIONS; n++)
    {
      align = random () & 15;
      pos = random () & 511;
      if (pos + align >= 512)
       pos = 511 - align - (random () & 7);
      len = random () & 511;
      if (pos >= len)
       len = pos + (random () & 7);
      if (len + align >= 512)
        len = 512 - align - (random () & 7);
      seek_char = random () & 255;
      j = len + align + 64;
      if (j > 512)
        j = 512;

      for (i = 0; i < j; i++)
       {
         if (i == pos + align)
           p[i] = seek_char;
         else
           {
             p[i] = random () & 255;
             if (i < pos + align && p[i] == seek_char)
              p[i] = seek_char + 13;
           }
       }

      if (pos < len)
       result = (char *) (p + pos + align);
      else
       result = NULL;

      FOR_EACH_IMPL (impl, 1)
       if (CALL (impl, (char *) (p + align), seek_char, len) != result)
         {
           error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
                 n, impl->name, align, seek_char, len, pos,
                 CALL (impl, (char *) (p + align), seek_char, len),
                 result, p);
           ret = 1;
         }
    }
}

Here is the caller graph for this function:

static void do_test ( size_t  align,
size_t  pos,
size_t  len,
int  seek_char 
) [static]

Definition at line 71 of file test-memchr.c.

{
  size_t i;
  char *result;

  align &= 7;
  if (align + len >= page_size)
    return;

  for (i = 0; i < len; ++i)
    {
      buf1[align + i] = 1 + 23 * i % 127;
      if (buf1[align + i] == seek_char)
        buf1[align + i] = seek_char + 1;
    }
  buf1[align + len] = 0;

  if (pos < len)
    {
      buf1[align + pos] = seek_char;
      buf1[align + len] = -seek_char;
      result = (char *) (buf1 + align + pos);
    }
  else
    {
      result = NULL;
      buf1[align + len] = seek_char;
    }

  if (HP_TIMING_AVAIL)
    printf ("Length %4zd, alignment %2zd:", pos, align);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, (char *) (buf1 + align), seek_char, len, result);

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

Here is the call graph for this function:

char * simple_memchr ( const char *  s,
int  c,
size_t  n 
)

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

{
  while (n--)
    if (*s++ == (char) c)
      return (char *) s - 1;
  return NULL;
}
int test_main ( void  )

Definition at line 164 of file test-memchr.c.

{
  size_t i;

  test_init ();

  printf ("%20s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 16 << i, 2048, 23);
      do_test (i, 64, 256, 23);
      do_test (0, 16 << i, 2048, 0);
      do_test (i, 64, 256, 0);
    }
  for (i = 1; i < 32; ++i)
    {
      do_test (0, i, i + 1, 23);
      do_test (0, i, i + 1, 0);
    }

  do_random_tests ();
  return ret;
}

Here is the call graph for this function: