/*
 * 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.
 */
/*
  Copyright (c) 2005 Eliot Dresselhaus

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef included_clib_serialize_h
#define included_clib_serialize_h

#include <stdarg.h>
#include <vppinfra/byte_order.h>
#include <vppinfra/types.h>
#include <vppinfra/vec.h>
#include <vppinfra/longjmp.h>

struct serialize_main_header_t;
struct serialize_stream_t;

typedef void (serialize_data_function_t) (struct serialize_main_header_t * h,
					  struct serialize_stream_t * s);

typedef struct serialize_stream_t
{
  /* Current data buffer being serialized/unserialized. */
  u8 *buffer;

  /* Size of buffer in bytes. */
  u32 n_buffer_bytes;

  /* Current index into buffer. */
  u32 current_buffer_index;

  /* Overflow buffer for when there is not enough room at the end of
     buffer to hold serialized/unserialized data. */
  u8 *overflow_buffer;

  /* Current index in overflow buffer for reads. */
  u32 current_overflow_index;

  u32 flags;
#define SERIALIZE_END_OF_STREAM (1 << 0)

  uword data_function_opaque;

  u32 opaque[64 - 4 * sizeof (u32) - 1 * sizeof (uword) -
	     2 * sizeof (void *)];
} serialize_stream_t;

always_inline void
serialize_stream_set_end_of_stream (serialize_stream_t * s)
{
  s->flags |= SERIALIZE_END_OF_STREAM;
}

always_inline uword
serialize_stream_is_end_of_stream (serialize_stream_t * s)
{
  return (s->flags & SERIALIZE_END_OF_STREAM) != 0;
}

typedef struct serialize_main_header_t
{
  u32 recursion_level;

  /* Data callback function and opaque data. */
  serialize_data_function_t *data_function;

  /* Error if signaled by data function. */
  clib_error_t *error;

  /* Exit unwind point if error occurs. */
  clib_longjmp_t error_longjmp;
} serialize_main_header_t;

always_inline void
serialize_error (serialize_main_header_t * m, clib_error_t * error)
{
  clib_longjmp (&m->error_longjmp, pointer_to_uword (error));
}

#define serialize_error_return(m,args...)			\
  serialize_error (&(m)->header, clib_error_return (0, args))

void *serialize_read_write_not_inline (serialize_main_header_t * m,
				       serialize_stream_t * s,
				       uword n_bytes, uword flags);

#define SERIALIZE_FLAG_IS_READ  (1 << 0)
#define SERIALIZE_FLAG_IS_WRITE (1 << 1)

always_inline void *
serialize_stream_read_write (serialize_main_header_t * header,
			     serialize_stream_t * s,
			     uword n_bytes, uword flags)
{
  uword i, j, l;

  l = vec_len (s->overflow_buffer);
  i = s->current_buffer_index;
  j = i + n_bytes;
  s->current_buffer_index = j;
  if (l == 0 && j <= s->n_buffer_bytes)
    {
      return s->buffer + i;
    }
  else
    {
      s->current_buffer_index = i;
      return serialize_read_write_not_inline (header, s, n_bytes, flags);
    }
}

typedef struct
{
  serialize_main_header_t header;
  serialize_stream_t stream;
} serialize_main_t;

always_inline void
serialize_set_end_of_stream (serialize_main_t * m)
{
  serialize_stream_set_end_of_stream (&m->stream);
}

always_inline uword
serialize_is_end_of_stream (serialize_main_t * m)
{
  return serialize_stream_is_end_of_stream (&m->stream);
}

typedef struct
{
  serialize_main_header_t header;
  serialize_stream_t *streams;
} serialize_multiple_main_t;

typedef void (serialize_function_t) (serialize_main_t * m, va_list * va);

always_inline void *
unserialize_get (serialize_main_t * m, uword n_bytes)
{
  return serialize_stream_read_write (&m->header, &m->stream, n_bytes,
				      SERIALIZE_FLAG_IS_READ);
}

always_inline void *
serialize_get (serialize_main_t * m, uword n_bytes)
{
  return serialize_stream_read_write (&m->header, &m->stream, n_bytes,
				      SERIALIZE_FLAG_IS_W
/*
 * 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.
 */
/*
 * cli.c: command line interface
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <vlib/vlib.h>
#include <vppinfra/cpu.h>

/* Root of all show commands. */
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vlib_cli_show_command, static) = {
  .path = "show",
  .short_help = "Show commands",
};
/* *INDENT-ON* */

/* Root of all clear commands. */
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vlib_cli_clear_command, static) = {
  .path = "clear",
  .short_help = "Clear commands",
};
/* *INDENT-ON* */

/* Root of all set commands. */
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vlib_cli_set_command, static) = {
  .path = "set",
  .short_help = "Set commands",
};
/* *INDENT-ON* */

/* Root of all test commands. */
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (vlib_cli_test_command, static) = {
  .path = "test",
  .short_help = "Test commands",
};
/* *INDENT-ON* */

/* Returns bitmap of commands which match key. */
static uword *
vlib_cli_sub_command_match (vlib_cli_command_t * c, unformat_input_t * input)
{
  int i, n;
  uword *match = 0;
  vlib_cli_parse_position_t *p;

  unformat_skip_white_space (input);

  for (i = 0;; i++)
    {
      uword k;

      k = unformat_get_input (input);
      switch (k)
	{
	case 'a' ... 'z':
	case 'A' ... 'Z':
	case '0' ... '9':
	case '-':
	case '_':
	  break;

	case ' ':
	case '\t':
	case '\r':
	case '\n':
	case UNFORMAT_END_OF_INPUT:
	  /* White space or end of input removes any non-white
	     matches that were before possible. */
	  if (i < vec_len (c->sub_command_positions)
	      && clib_bitmap_count_set_bits (match) > 1)
	    {
	      p = vec_elt_at_index (c->sub_command_positions, i);
	      for (n = 0; n < vec_len (p->bitmaps); n++)
		match = clib_bitmap_andnot (match, p->bitmaps[n]);
	    }
	  goto done;

	default:
	  unformat_put_input (input);
	  goto done;
	}

      if (i >= vec_len (c->sub_command_positions))
	{
	no_match:
	  clib_bitmap_free (match);
	  return 0;
	}

      p = vec_elt_at_index (c->sub_command_positions, i);
      if (vec_len (p->bitmaps) == 0)
	goto no_match;

      n = k - p->min_char;
      if (n < 0 || n >= vec_len (p->bitmaps))
	goto no_match;

      if (i == 0)
	match = clib_bitmap_dup (p->bitmaps[n]);
      else
	match = clib_bitmap_and (match, p->bitmaps[n]);

      if (clib_bitmap_is_zero (match))
	goto no_match;
    }

done:
  return match;
}

/* Looks for string based sub-input formatted { SUB-INPUT }. */
uword
unformat_vlib_cli_sub_input (unformat_input_t * i, va_list * args)
{
  unformat_input_t *sub_input = va_arg (*args, unformat_input_t *);
  u8 *s;
  uword c;

  while (1)
    {
      c = unformat_get_input (i);
      switch (c)
	{
	case ' ':
	case '\t':
	case '\n':
	case '\r':
	case '\f':
	  break;

	case '{':
	default:
	  /* Put back paren. */
	  if (c != UNFORMAT_END_OF_INPUT)
	    unformat_put_input (i);

	  if (c == '{' && unformat (i, "%v", &s))
	    {
	      unformat_init_vector (sub_input, s);
	      return 1;
	    }
	  return 0;
	}
    }
  return 0;
}

static vlib_cli_command_t *
get_sub_command (vlib_cli_main_t * cm, vlib_cli_command_t * parent, u32 si)
{
  vlib_cli_sub_command_t *s = vec_elt_at_index (parent->sub_commands, si);
  return vec_elt_at_index (cm->commands, s->index);
}

static uword
unformat_vlib_cli_sub_command (unformat_input_t * i, va_list * args)
{
  vlib_main_t *vm = va_arg (*args, vlib_main_t *);
  vlib_cli_command_t *c = va_arg (*args, vlib_cli_command_t *);
  vlib_cli_command_t **result = va_arg (*args, vlib_cli_command_t **);
  vlib_cli_main_t *cm = &vm->cli_main;
  uword *match_bitmap, is_unique, index;

  {
    vlib_cli_sub_rule_t *sr;
    vlib_cli_parse_rule_t *r;
    vec_foreach (sr, c->sub_rules)
    {
      void **d;
      r = vec_elt_at_index (cm->parse_rules, sr->rule_index);
      vec_add2 (cm->parse_rule_data, d, 1);
      vec_reset_length (d[0]);
      if (r->data_size)
	d[0] = _vec_resize (d[0],
			    /* length increment */ 1,
			    r->data_size,
			    /* header_bytes */ 0,
			    /* data align */ sizeof (uword));
      if (unformat_user (i, r->unformat_function, vm, d[0]))
	{
	  *result = vec_elt_at_index (cm->commands, sr->command_index);
	  return 1;
	}
    }
  }

  match_bitmap = vlib_cli_sub_command_match (c, i);
  is_unique = clib_bitmap_count_set_bits (match_bitmap) == 1;
  index = ~0;
  if (is_unique)
    {
      index = clib_bitmap_first_set (match_bitmap);
      *result = get_sub_command (cm, c, index);
    }
  clib_bitmap_free (match_bitmap);

  return is_unique;
}

static u8 *
format_vlib_cli_command_help (u8 * s, va_list * args)
{
  vlib_cli_command_t *c = va_arg (*args, vlib_cli_command_t *);
  int is_long = va_arg (*args, int);
  if (is_long && c->long_help)
    s = format (s, "%s", c->long_help);
  else if (c->short_help)
    s = format (s, "%s", c->short_help);
  else
    s = format (s, "%v commands", c->path);
  return s;
}

static u8 *
format_vlib_cli_parse_rule_name (u8 * s, va_list * args)
{
  vlib_cli_parse_rule_t *r = va_arg (*args, vlib_cli_parse_rule_t *);
  return format (s, "<%U>", format_c_identifier, r->name);
}

static u8 *
format_vlib_cli_path (u8 * s, va_list * args)
{
  u8 *path = va_arg (*args, u8 *);
  int i, in_rule;
  in_rule = 0;
  for (i = 0; i < vec_len (path); i++)
    {
      switch (path[i])
	{
	case '%':
	  in_rule = 1;
	  vec_add1 (s, '<');	/* start of <RULE> */
	  break;

	case '_':
	  /* _ -> space in rules. */
	  vec_add1 (s, in_rule ? ' ' : '_');
	  break;

	case ' ':
	  if (in_rule)
	    {
	      vec_add1 (s, '>');	/* end of <RULE> */
	      in_rule = 0;
	    }
	  vec_add1 (s, ' ');
	  break;

	default:
	  vec_add1 (s, path[i]);
	  break;
	}
    }

  if (in_rule)
    vec_add1 (s, '>');		/* terminate <RULE> */

  return s;
}

static vlib_cli_command_t *
all_subs (vlib_cli_main_t * cm, vlib_cli_command_t * subs, u32 command_index)
{
  vlib_cli_command_t *c = vec_elt_at_index (cm->commands, command_index);
  vlib_cli_sub_command_t *sc;
  vlib_cli_sub_rule_t *sr;

  if (c->function)
    vec_add1 (subs, c[0]);

  vec_foreach (sr, c->sub_rules)
    subs = all_subs (cm, subs, sr->command_index);
  vec_foreach (sc, c->sub_commands) subs = all_subs (cm, subs, sc->index);

  return subs;
}

static int
vlib_cli_cmp_rule (void *a1, void *a2)
{
  vlib_cli_sub_rule_t *r1 = a1;
  vlib_cli_sub_rule_t *r2 = a2;

  return vec_cmp (r1->name, r2->name);
}

static int
vlib_cli_cmp_command (void *a1, void *a2)
{
  vlib_cli_command_t *c1 = a1;
  vlib_cli_command_t *c2 = a2;

  return vec_cmp (c1->path, c2->path);
}

static clib_error_t *
vlib_cli_dispatch_sub_commands (vlib_main_t * vm,
				vlib_cli_main_t * cm,
				unformat_input_t * input,
				uword parent_command_index)
{
  vlib_cli_command_t *parent, *c;
  clib_error_t *error = 0;
  unformat_input_t sub_input;
  u8 *string;
  uword is_main_dispatch = cm == &vm->cli_main;

  parent = vec_elt_at_index (cm->commands, parent_command_index);
  if (is_main_dispatch && unformat (input, "help"))
    {
      uword help_at_end_of_line, i;

      help_at_end_of_line =
	unformat_check_input (input) == UNFORMAT_END_OF_INPUT;
      while (1)
	{
	  c = parent;
	  if (unformat_user
	      (input, unformat_vlib_cli_sub_command, vm, c, &parent))
	    ;

	  else if (!(unformat_check_input (input) == UNFORMAT_END_OF_INPUT))
	    goto unknown;

	  else
	    break;
	}

      /* help SUB-COMMAND => long format help.
         "help" at end of line: show all commands. */
      if (!help_at_end_of_line)
	vlib_cli_output (vm, "%U", format_vlib_cli_command_help, c,
			 /* is_long */ 1);

      else if (vec_len (c->sub_commands) + vec_len (c->sub_rules) == 0)
	vlib_cli_output (vm, "%v: no sub-commands", c->path);

      else
	{
	  vlib_cli_sub_command_t *sc;
	  vlib_cli_sub_rule_t *sr, *subs;

	  subs = vec_dup (c->sub_rules);

	  /* Add in rules if any. */
	  vec_foreach (sc, c->sub_commands)
	  {
	    vec_add2 (subs, sr, 1);
	    sr->name = sc->name;
	    sr->command_index = sc->index;
	    sr->rule_index = ~0;
	  }

	  vec_sort_with_function (subs, vlib_cli_cmp_rule);

	  for (i = 0; i < vec_len (subs); i++)
	    {
	      vlib_cli_command_t *d;
	      vlib_cli_parse_rule_t *r;

	      d = vec_elt_at_index (cm->commands, subs[i].command_index);
	      r =
		subs[i].rule_index != ~0 ? vec_elt_at_index (cm->parse_rules,
							     subs
							     [i].rule_index) :
		0;

	      if (r)
		vlib_cli_output
		  (vm, "  %-30U %U",
		   format_vlib_cli_parse_rule_name, r,
		   format_vlib_cli_command_help, d, /* is_long */ 0);
	      else
		vlib_cli_output
		  (vm, "  %-30v %U",
		   subs[i].name,
		   format_vlib_cli_command_help, d, /* is_long */ 0);
	    }

	  vec_free (subs);
	}
    }

  else if (is_main_dispatch
	   && (unformat (input, "choices") || unformat (input, "?")))
    {
      vlib_cli_command_t *sub, *subs;

      subs = all_subs (cm, 0, parent_command_index);
      vec_sort_with_function (subs, vlib_cli_cmp_command);
      vec_foreach (sub, subs)
	vlib_cli_output (vm, "  %-40U %U",
			 format_vlib_cli_path, sub->path,
			 format_vlib_cli_command_help, sub, /* is_long */ 0);
      vec_free (subs);
    }

  else if (unformat (input, "comment %v", &string))
    {
      vec_free (string);
    }

  else if (unformat (input, "uncomment %U",
		     unformat_vlib_cli_sub_input, &sub_input))
    {
      error =
	vlib_cli_dispatch_sub_commands (vm, cm, &sub_input,
					parent_command_index);
      unformat_free (&sub_input);
    }

  else
    if (unformat_user (input, unformat_vlib_cli_sub_command, vm, parent, &c))
    {
      unformat_input_t *si;
      uword has_sub_commands =
	vec_len (c->sub_commands) + vec_len (c->sub_rules) > 0;

      si = input;
      if (unformat_user (input, unformat_vlib_cli_sub_input, &sub_input))
	si = &sub_input;

      if (has_sub_commands)
	error = vlib_cli_dispatch_sub_commands (vm, cm, si, c - cm->commands);

      if (has_sub_commands && !error)
	/* Found valid sub-command. */ ;

      else if (c->function)
	{
	  clib_error_t *c_error;

	  /* Skip white space for benefit of called function. */
	  unformat_skip_white_space (si);

	  if (unformat (si, "?"))
	    {
	      vlib_cli_output (vm, "  %-40U %U", format_vlib_cli_path, c->path, format_vlib_cli_command_help, c,	/* is_long */
			       0);
	    }
	  else
	    {
	      if (!c->is_mp_safe)
		vlib_worker_thread_barrier_sync (vm);

	      c_error = c->function (vm, si, c);

	      if (!c->is_mp_safe)
		vlib_worker_thread_barrier_release (vm);

	      if (c_error)
		{
		  error =
		    clib_error_return (0, "%v: %v", c->path, c_error->what);
		  clib_error_free (c_error);
		  /* Free sub input. */
		  if (si != input)
		    unformat_free (si);

		  return error;
		}
	    }

	  /* Free any previous error. */
	  clib_error_free (error);
	}

      else if (!error)
	error = clib_error_return (0, "%v: no sub-commands", c->path);

      /* Free sub input. */
      if (si != input)
	unformat_free (si);
    }

  else
    goto unknown;

  return error;

unknown:
  if (parent->path)
    return clib_error_return (0, "%v: unknown input `%U'", parent->path,
			      format_unformat_error, input);
  else
    return clib_error_return (0, "unknown input `%U'", format_unformat_error,
			      input);
}


void vlib_unix_error_report (vlib_main_t *, clib_error_t *)
  __attribute__ ((weak));

void
vlib_unix_error_report (vlib_main_t * vm, clib_error_t * error)
{
}

/* Process CLI input. */
void
vlib_cli_input (vlib_main_t * vm,
		unformat_input_t * input,
		vlib_cli_output_function_t * function, uword function_arg)
{
  vlib_process_t *cp = vlib_get_current_process (vm);
  vlib_cli_main_t *cm = &vm->cli_main;
  clib_error_t *error;
  vlib_cli_output_function_t *save_function;
  uword save_function_arg;

  save_function = cp->output_function;
  save_function_arg = cp->output_function_arg;

  cp->output_function = function;
  cp->output_function_arg = function_arg;

  do
    {
      vec_reset_length (cm->parse_rule_data);
      error = vlib_cli_dispatch_sub_commands (vm, &vm->cli_main, input,	/* parent */
					      0);
    }
  while (!error && !unformat (input, "%U", unformat_eof));

  if (error)
    {
      vlib_cli_output (vm, "%v", error->what);
      vlib_unix_error_report (vm, error);
      clib_error_free (error);
    }

  cp->output_function = save_function;
  cp->output_function_arg = save_function_arg;
}

/* Output to current CLI connection. */
void
vlib_cli_output (vlib_main_t * vm, char *fmt, ...)
{
  vlib_process_t *cp = vlib_get_current_process (vm);
  va_list va;
  u8 *s;

  va_start (va, fmt);
  s = va_format (0, fmt, &va);
  va_end (va);

  /* Terminate with \n if not present. */
  if (vec_len (s) > 0 && s[vec_len (s) - 1] != '\n')
    vec_add1 (s, '\n');

  if ((!cp) || (!cp->output_function))
    fformat (stdout, "%v", s);
  else
    cp->output_function (cp->output_function_arg, s, vec_len (s));

  vec_free (s);
}

static clib_error_t *
show_memory_usage (vlib_main_t * vm,
		   unformat_input_t * input, vlib_cli_command_t * cmd)
{
  int verbose = 0;
  clib_error_t *error;
  u32 index = 0;

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "verbose"))
	verbose = 1;
      else
	{
	  error = clib_error_return (0, "unknown input `%U'",
				     format_unformat_error, input);
	  return error;
	}
    }

  /* *INDENT-OFF* */
  foreach_vlib_main (
  ({
      vlib_cli_output (vm, "Thread %d %v\n", index, vlib_worker_threads[index].name);
      vlib_cli_output (vm, "%U\n", format_mheap, clib_per_cpu_mheaps[index], verbose);
      index++;
  }));
  /* *INDENT-ON* */
  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_memory_usage_command, static) = {
  .path = "show memory",
  .short_help = "Show current memory usage",
  .function = show_memory_usage,
};
/* *INDENT-ON* */

static clib_error_t *
show_cpu (vlib_main_t * vm, unformat_input_t * input,
	  vlib_cli_command_t * cmd)
{
#define _(a,b,c) vlib_cli_output (vm, "%-25s " b, a ":", c);
  _("Model name", "%U", format_cpu_model_name);
  _("Microarchitecture", "%U", format_cpu_uarch);
  _("Flags", "%U", format_cpu_flags);
  _("Base frequency", "%.2f GHz",
    ((f64) vm->clib_time.clocks_per_second) * 1e-9);
#undef _
  return 0;
}

/*?
 * Displays various information about the CPU.
 *
 * @cliexpar
 * @cliexstart{show cpu}
 * Model name:               Intel(R) Xeon(R) CPU E5-2667 v4 @ 3.20GHz
 * Microarchitecture:        Broadwell (Broadwell-EP/EX)
 * Flags:                    sse3 ssse3 sse41 sse42 avx avx2 aes
 * Base Frequency:           3.20 GHz
 * @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_cpu_command, static) = {
  .path = "show cpu",
  .short_help = "Show cpu information",
  .function = show_cpu,
};

/* *INDENT-ON* */
static clib_error_t *
enable_disable_memory_trace (vlib_main_t * vm,
			     unformat_input_t * input,
			     vlib_cli_command_t * cmd)
{
  clib_error_t *error = 0;
  int enable;

  if (!unformat_user (input, unformat_vlib_enable_disable, &enable))
    {
      error = clib_error_return (0, "expecting enable/on or disable/off");
      goto done;
    }

  clib_mem_trace (enable);

done:
  return error;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (enable_disable_memory_trace_command, static) = {
  .path = "memory-trace",
  .short_help = "Enable/disable memory allocation trace",
  .function = enable_disable_memory_trace,
};
/* *INDENT-ON* */


static clib_error_t *
test_heap_validate (vlib_main_t * vm, unformat_input_t * input,
		    vlib_cli_command_t * cmd)
{
  clib_error_t *error = 0;
  void *heap;
  mheap_t *mheap;

  if (unformat (input, "on"))
    {
        /* *INDENT-OFF* */
        foreach_vlib_main({
          heap = clib_per_cpu_mheaps[this_vlib_main->cpu_index];
          mheap = mheap_header(heap);
          mheap->flags |= MHEAP_FLAG_VALIDATE;
          // Turn off small object cache because it delays detection of errors
          mheap->flags &= ~MHEAP_FLAG_SMALL_OBJECT_CACHE;
        });
        /* *INDENT-ON* */

    }
  else if (unformat (input, "off"))
    {
        /* *INDENT-OFF* */
        foreach_vlib_main({
          heap = clib_per_cpu_mheaps[this_vlib_main->cpu_index];
          mheap = mheap_header(heap);
          mheap->flags &= ~MHEAP_FLAG_VALIDATE;
          mheap->flags |= MHEAP_FLAG_SMALL_OBJECT_CACHE;
        });
        /* *INDENT-ON* */
    }
  else if (unformat (input, "now"))
    {
        /* *INDENT-OFF* */
        foreach_vlib_main({
          heap = clib_per_cpu_mheaps[this_vlib_main->cpu_index];
          mheap = mheap_header(heap);
          mheap_validate(heap);
        });
        /* *INDENT-ON* */
      vlib_cli_output (vm, "heap validation complete");

    }
  else
    {
      return clib_error_return (0, "unknown input `%U'",
				format_unformat_error, input);
    }

  return error;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cmd_test_heap_validate,static) = {
    .path = "test heap-validate",
    .short_help = "<on/off/now> validate heap on future allocs/frees or right now",
    .function = test_heap_validate,
};
/* *INDENT-ON* */

#ifdef TEST_CODE
/*
 * A trivial test harness to verify the per-process output_function
 * is working correcty.
 */

static clib_error_t *
sleep_ten_seconds (vlib_main_t * vm,
		   unformat_input_t * input, vlib_cli_command_t * cmd)
{
  u16 i;
  u16 my_id = rand ();

  vlib_cli_output (vm, "Starting 10 seconds sleep with id %u\n", my_id);

  for (i = 0; i < 10; i++)
    {
      vlib_process_wait_for_event_or_clock (vm, 1.0);
      vlib_cli_output (vm, "Iteration number %u, my id: %u\n", i, my_id);
    }
  vlib_cli_output (vm, "Done with sleep with id %u\n", my_id);
  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (ping_command, static) = {
  .path = "test sleep",
  .function = sleep_ten_seconds,
  .short_help = "Sleep for 10 seconds",
};
/* *INDENT-ON* */
#endif /* ifdef TEST_CODE */

static uword
vlib_cli_normalize_path (char *input, char **result)
{
  char *i = input;
  char *s = 0;
  uword l = 0;
  uword index_of_last_space = ~0;

  while (*i != 0)
    {
      u8 c = *i++;
      /* Multiple white space -> single space. */
      switch (c)
	{
	case ' ':
	case '\t':
	case '\n':
	case '\r':
	  if (l > 0 && s[l - 1] != ' ')
	    {
	      vec_add1 (s, ' ');
	      l++;
	    }
	  break;

	default:
	  if (l > 0 && s[l - 1] == ' ')
	    index_of_last_space = vec_len (s);
	  vec_add1 (s, c);
	  l++;
	  break;
	}
    }

  /* Remove any extra space at end. */
  if (l > 0 && s[l - 1] == ' ')
    _vec_len (s) -= 1;

  *result = s;
  return index_of_last_space;
}

always_inline uword
parent_path_len (char *path)
{
  word i;
  for (i = vec_len (path) - 1; i >= 0; i--)
    {
      if (path[i] == ' ')
	return i;
    }
  return ~0;
}

static void
add_sub_command (vlib_cli_main_t * cm, uword parent_index, uword child_index)
{
  vlib_cli_command_t *p, *c;
  vlib_cli_sub_command_t *sub_c;
  u8 *sub_name;
  word i, l;

  p = vec_elt_at_index (cm->commands, parent_index);
  c = vec_elt_at_index (cm->commands, child_index);

  l = parent_path_len (c->path);
  if (l == ~0)
    sub_name = vec_dup ((u8 *) c->path);
  else
    {
      ASSERT (l + 1 < vec_len (c->path));
      sub_name = 0;
      vec_add (sub_name, c->path + l + 1, vec_len (c->path) - (l + 1));
    }

  if (sub_name[0] == '%')
    {
      uword *q;
      vlib_cli_sub_rule_t *sr;

      /* Remove %. */
      vec_delete (sub_name, 1, 0);

      if (!p->sub_rule_index_by_name)
	p->sub_rule_index_by_name = hash_create_vec ( /* initial length */ 32,
						     sizeof (sub_name[0]),
						     sizeof (uword));
      q = hash_get_mem (p->sub_rule_index_by_name, sub_name);
      if (q)
	{
	  sr = vec_elt_at_index (p->sub_rules, q[0]);
	  ASSERT (sr->command_index == child_index);
	  return;
	}

      q = hash_get_mem (cm->parse_rule_index_by_name, sub_name);
      if (!q)
	{
	  clib_error ("reference to unknown rule `%%%v' in path `%v'",
		      sub_name, c->path);
	  return;
	}

      hash_set_mem (p->sub_rule_index_by_name, sub_name,
		    vec_len (p->sub_rules));
      vec_add2 (p->sub_rules, sr, 1);
      sr->name = sub_name;
      sr->rule_index = q[0];
      sr->command_index = child_index;
      return;
    }

  if (!p->sub_command_index_by_name)
    p->sub_command_index_by_name = hash_create_vec ( /* initial length */ 32,
						    sizeof (c->path[0]),
						    sizeof (uword));

  /* Check if sub-command has already been created. */
  if (hash_get_mem (p->sub_command_index_by_name, sub_name))
    {
      vec_free (sub_name);
      return;
    }

  vec_add2 (p->sub_commands, sub_c, 1);
  sub_c->index = child_index;
  sub_c->name = sub_name;
  hash_set_mem (p->sub_command_index_by_name, sub_c->name,
		sub_c - p->sub_commands);

  vec_validate (p->sub_command_positions, vec_len (sub_c->name) - 1);
  for (i = 0; i < vec_len (sub_c->name); i++)
    {
      int n;
      vlib_cli_parse_position_t *pos;

      pos = vec_elt_at_index (p->sub_command_positions, i);

      if (!pos->bitmaps)
	pos->min_char = sub_c->name[i];

      n = sub_c->name[i] - pos->min_char;
      if (n < 0)
	{
	  pos->min_char = sub_c->name[i];
	  vec_insert (pos->bitmaps, -n, 0);
	  n = 0;
	}

      vec_validate (pos->bitmaps, n);
      pos->bitmaps[n] =
	clib_bitmap_ori (pos->bitmaps[n], sub_c - p->sub_commands);
    }
}

static void
vlib_cli_make_parent (vlib_cli_main_t * cm, uword ci)
{
  uword p_len, pi, *p;
  char *p_path;
  vlib_cli_command_t *c, *parent;

  /* Root command (index 0) should have already been added. */
  ASSERT (vec_len (cm->commands) > 0);

  c = vec_elt_at_index (cm->commands, ci);
  p_len = parent_path_len (c->path);

  /* No space?  Parent is root command. */
  if (p_len == ~0)
    {
      add_sub_command (cm, 0, ci);
      return;
    }

  p_path = 0;
  vec_add (p_path, c->path, p_len);

  p = hash_get_mem (cm->command_index_by_path, p_path);

  /* Parent exists? */
  if (!p)
    {
      /* Parent does not exist; create it. */
      vec_add2 (cm->commands, parent, 1);
      parent->path = p_path;
      hash_set_mem (cm->command_index_by_path, parent->path,
		    parent - cm->commands);
      pi = parent - cm->commands;
    }
  else
    {
      pi = p[0];
      vec_free (p_path);
    }

  add_sub_command (cm, pi, ci);

  /* Create parent's parent. */
  if (!p)
    vlib_cli_make_parent (cm, pi);
}

always_inline uword
vlib_cli_command_is_empty (vlib_cli_command_t * c)
{
  return (c->long_help == 0 && c->short_help == 0 && c->function == 0);
}

clib_error_t *
vlib_cli_register (vlib_main_t * vm, vlib_cli_command_t * c)
{
  vlib_cli_main_t *cm = &vm->cli_main;
  clib_error_t *error = 0;
  uword ci, *p;
  char *normalized_path;

  if ((error = vlib_call_init_function (vm, vlib_cli_init)))
    return error;

  (void) vlib_cli_normalize_path (c->path, &normalized_path);

  if (!cm->command_index_by_path)
    cm->command_index_by_path = hash_create_vec ( /* initial length */ 32,
						 sizeof (c->path[0]),
						 sizeof (uword));

  /* See if command already exists with given path. */
  p = hash_get_mem (cm->command_index_by_path, normalized_path);
  if (p)
    {
      vlib_cli_command_t *d;

      ci = p[0];
      d = vec_elt_at_index (cm->commands, ci);

      /* If existing command was created via vlib_cli_make_parent
         replaced it with callers data. */
      if (vlib_cli_command_is_empty (d))
	{
	  vlib_cli_command_t save = d[0];

	  ASSERT (!vlib_cli_command_is_empty (c));

	  /* Copy callers fields. */
	  d[0] = c[0];

	  /* Save internal fields. */
	  d->path = save.path;
	  d->sub_commands = save.sub_commands;
	  d->sub_command_index_by_name = save.sub_command_index_by_name;
	  d->sub_command_positions = save.sub_command_positions;
	  d->sub_rules = save.sub_rules;
	}
      else
	error =
	  clib_error_return (0, "duplicate command name with path %v",
			     normalized_path);

      vec_free (normalized_path);
      if (error)
	return error;
    }
  else
    {
      /* Command does not exist: create it. */

      /* Add root command (index 0). */
      if (vec_len (cm->commands) == 0)
	{
	  /* Create command with index 0; path is empty string. */
	  vec_resize (cm->commands, 1);
	}

      ci = vec_len (cm->commands);
      hash_set_mem (cm->command_index_by_path, normalized_path, ci);
      vec_add1 (cm->commands, c[0]);

      c = vec_elt_at_index (cm->commands, ci);
      c->path = normalized_path;

      /* Don't inherit from registration. */
      c->sub_commands = 0;
      c->sub_command_index_by_name = 0;
      c->sub_command_positions = 0;
    }

  vlib_cli_make_parent (cm, ci);
  return 0;
}

clib_error_t *
vlib_cli_register_parse_rule (vlib_main_t * vm, vlib_cli_parse_rule_t * r_reg)
{
  vlib_cli_main_t *cm = &vm->cli_main;
  vlib_cli_parse_rule_t *r;
  clib_error_t *error = 0;
  u8 *r_name;
  uword *p;

  if (!cm->parse_rule_index_by_name)
    cm->parse_rule_index_by_name = hash_create_vec ( /* initial length */ 32,
						    sizeof (r->name[0]),
						    sizeof (uword));

  /* Make vector copy of name. */
  r_name = format (0, "%s", r_reg->name);

  if ((p = hash_get_mem (cm->parse_rule_index_by_name, r_name)))
    {
      vec_free (r_name);
      return clib_error_return (0, "duplicate parse rule name `%s'",
				r_reg->name);
    }

  vec_add2 (cm->parse_rules, r, 1);
  r[0] = r_reg[0];
  r->name = (char *) r_name;
  hash_set_mem (cm->parse_rule_index_by_name, r->name, r - cm->parse_rules);

  return error;
}

#if 0
/* $$$ turn back on again someday, maybe */
static clib_error_t *vlib_cli_register_parse_rules (vlib_main_t * vm,
						    vlib_cli_parse_rule_t *
						    lo,
						    vlib_cli_parse_rule_t *
						    hi)
  __attribute__ ((unused))
{
  clib_error_t *error = 0;
  vlib_cli_parse_rule_t *r;

  for (r = lo; r < hi; r = clib_elf_section_data_next (r, 0))
    {
      if (!r->name || strlen (r->name) == 0)
	{
	  error = clib_error_return (0, "parse rule with no name");
	  goto done;
	}

      error = vlib_cli_register_parse_rule (vm, r);
      if (error)
	goto done;
    }

done:
  return error;
}
#endif

static clib_error_t *
vlib_cli_init (vlib_main_t * vm)
{
  vlib_cli_main_t *cm = &vm->cli_main;
  clib_error_t *error = 0;
  vlib_cli_command_t *cmd;

  cmd = cm->cli_command_registrations;

  while (cmd)
    {
      error = vlib_cli_register (vm, cmd);
      if (error)
	return error;
      cmd = cmd->next_cli_command;
    }
  return error;
}

VLIB_INIT_FUNCTION (vlib_cli_init);

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