summaryrefslogtreecommitdiffstats
path: root/test/log.py
AgeCommit message (Expand)AuthorFilesLines
2017-01-13make test: improve test results printingKlement Sekera1-2/+2
2016-12-23make test: add log.txtKlement Sekera1-8/+9
2016-12-09BFD: fix timing in the main loopKlement Sekera1-1/+2
2016-10-31add vpp debugging support to test frameworkKlement Sekera1-0/+71
d='n101' href='#n101'>101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vppinfra/ptclosure.h>
#include <vppinfra/hash.h>

typedef struct
{
  uword *index_by_name;
  u8 *items;
} test_main_t;

test_main_t test_main;

static char *items[] = {
  "d",
  "a",
  "b",
  "c",
};

char *constraints[] = {
  "a,b",
  "b,c",
  "d,b",
  //    "c,a", /* no partial order possible */
};

u32
vl (void *p)
{
  return vec_len (p);
}

static void
dump_closure (test_main_t * tm, char *s, u8 ** orig)
{
  int i, j;

  fformat (stdout, "--------- %s --------------\n", s);
  for (i = 0; i < vec_len (orig); i++)
    {
      for (j = 0; j < vec_len (orig); j++)
	if (orig[i][j])
	  {
	    fformat (stdout, "%s <before> %s\n", items[i], items[j]);
	  }
    }
}

int
comma_split (u8 * s, u8 ** a, u8 ** b)
{
  *a = s;

  while (*s && *s != ',')
    s++;

  if (*s == ',')
    *s = 0;
  else
    return 1;

  *b = (u8 *) (s + 1);
  return 0;
}

int
test_ptclosure_main (unformat_input_t * input)
{
  test_main_t *tm = &test_main;
  u8 *item_name;
  int i, j;
  u8 **orig;
  u8 **closure;
  u8 *a_name, *b_name;
  int a_index, b_index;
  uword *p;
  u8 *this_constraint;
  int n;
  u32 *result = 0;

  tm->index_by_name = hash_create_string (0, sizeof (uword));

  n = ARRAY_LEN (items);

  for (i = 0; i < n; i++)
    {
      item_name = (u8 *) items[i];
      hash_set_mem (tm->index_by_name, item_name, i);
    }

  orig = clib_ptclosure_alloc (n);

  for (i = 0; i < ARRAY_LEN (constraints); i++)
    {
      this_constraint = format (0, "%s%c", constraints[i], 0);

      if (comma_split (this_constraint, &a_name, &b_name))
	{
	  clib_warning ("couldn't split '%s'", constraints[i]);
	  return 1;
	}

      p = hash_get_mem (tm->index_by_name, a_name);
      if (p == 0)
	{
	  clib_warning ("couldn't find '%s'", a_name);
	  return 1;
	}
      a_index = p[0];

      p = hash_get_mem (tm->index_by_name, b_name);
      if (p == 0)
	{
	  clib_warning ("couldn't find '%s'", b_name);
	  return 1;
	}
      b_index = p[0];

      orig[a_index][b_index] = 1;
      vec_free (this_constraint);
    }

  dump_closure (tm, "original relation", orig);

  closure = clib_ptclosure (orig);

  dump_closure (tm, "closure", closure);

  /*
   * Output partial order
   */

again:
  for (i = 0; i < n; i++)
    {
      for (j = 0; j < n; j++)
	{
	  if (closure[i][j])
	    goto item_constrained;
	}
      /* Item i can be output */
      vec_add1 (result, i);
      {
	int k;
	for (k = 0; k < n; k++)
	  closure[k][i] = 0;
	/* "Magic" a before a, to keep from ever outputting it again */
	closure[i][i] = 1;
	goto again;
      }
    item_constrained:
      ;
    }

  if (vec_len (result) != n)
    {
      clib_warning ("no partial order exists");
      exit (1);
    }

  fformat (stdout, "Partial order:\n");

  for (i = vec_len (result) - 1; i >= 0; i--)
    {
      fformat (stdout, "%s\n", items[result[i]]);
    }

  vec_free (result);
  clib_ptclosure_free (orig);
  clib_ptclosure_free (closure);

  return 0;
}

#ifdef CLIB_UNIX
int
main (int argc, char *argv[])
{
  unformat_input_t i;
  int ret;

  clib_mem_init (0, 3ULL << 30);

  unformat_init_command_line (&i, argv);
  ret = test_ptclosure_main (&i);
  unformat_free (&i);

  return ret;
}
#endif /* CLIB_UNIX */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */