src/vppinfra/std-formats.c - fdio/vpp - Gitiles

 /*
  * 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) 2001, 2002, 2003 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 <vppinfra/format.h>
 #include <ctype.h>

 /* Format vectors. */
 u8 *
 format_vec32 (u8 * s, va_list * va)
 {
   u32 *v = va_arg (*va, u32 *);
   char *fmt = va_arg (*va, char *);
   uword i;
   for (i = 0; i < vec_len (v); i++)
     {
       if (i > 0)
 	s = format (s, ", ");
       s = format (s, fmt, v[i]);
     }
   return s;
 }

 u8 *
 format_vec_uword (u8 * s, va_list * va)
 {
   uword *v = va_arg (*va, uword *);
   char *fmt = va_arg (*va, char *);
   uword i;
   for (i = 0; i < vec_len (v); i++)
     {
       if (i > 0)
 	s = format (s, ", ");
       s = format (s, fmt, v[i]);
     }
   return s;
 }

 /* Ascii buffer and length. */
 u8 *
 format_ascii_bytes (u8 * s, va_list * va)
 {
   u8 *v = va_arg (*va, u8 *);
   uword n_bytes = va_arg (*va, uword);
   vec_add (s, v, n_bytes);
   return s;
 }

 /* Format hex dump. */
 u8 *
 format_hex_bytes (u8 * s, va_list * va)
 {
   u8 *bytes = va_arg (*va, u8 *);
   int n_bytes = va_arg (*va, int);
   uword i;

   /* Print short or long form depending on byte count. */
   uword short_form = n_bytes <= 32;
   u32 indent = format_get_indent (s);

   if (n_bytes == 0)
     return s;

   for (i = 0; i < n_bytes; i++)
     {
       if (!short_form && (i % 32) == 0)
 	s = format (s, "%08x: ", i);

       s = format (s, "%02x", bytes[i]);

       if (!short_form && ((i + 1) % 32) == 0 && (i + 1) < n_bytes)
 	s = format (s, "\n%U", format_white_space, indent);
     }

   return s;
 }

 u8 *
 format_hex_bytes_no_wrap (u8 * s, va_list * va)
 {
   u8 *bytes = va_arg (*va, u8 *);
   int n_bytes = va_arg (*va, int);
   uword i;

   if (n_bytes == 0)
     return s;

   for (i = 0; i < n_bytes; i++)
     s = format (s, "%02x", bytes[i]);

   return s;
 }

 /* Add variable number of spaces. */
 u8 *
 format_white_space (u8 * s, va_list * va)
 {
   u32 n = va_arg (*va, u32);
   while (n-- > 0)
     vec_add1 (s, ' ');
   return s;
 }

 u8 *
 format_duration (u8 *s, va_list *args)
 {
   f64 t = va_arg (*args, f64);
   s = format (s, "");

   const f64 seconds_per_minute = 60;
   const f64 seconds_per_hour = 60 * seconds_per_minute;
   const f64 seconds_per_day = 24 * seconds_per_hour;
   uword days, hours, minutes, secs, msecs, usecs;

   days = t / seconds_per_day;
   t -= days * seconds_per_day;

   hours = t / seconds_per_hour;
   t -= hours * seconds_per_hour;

   minutes = t / seconds_per_minute;
   t -= minutes * seconds_per_minute;

   secs = t;
   t -= secs;

   msecs = 1e3 * t;

   usecs = 1e6 * t;
   usecs = usecs % 1000;

   if (t == 0.)
     s = format (s, "0");
   if (days)
     s = format (s, "%ddays ", days);
   if (hours)
     s = format (s, "%dh ", hours);
   if (minutes)
     s = format (s, "%dmin ", minutes);
   if (secs)
     s = format (s, "%ds ", secs);
   if (msecs)
     s = format (s, "%dms ", msecs);
   if (usecs)
     s = format (s, "%dus", usecs);

   return (s);
 }

 u8 *
 format_time_interval (u8 * s, va_list * args)
 {
   u8 *fmt = va_arg (*args, u8 *);
   f64 t = va_arg (*args, f64);
   u8 *f;

   const f64 seconds_per_minute = 60;
   const f64 seconds_per_hour = 60 * seconds_per_minute;
   const f64 seconds_per_day = 24 * seconds_per_hour;
   uword days, hours, minutes, secs, msecs, usecs;

   days = t / seconds_per_day;
   t -= days * seconds_per_day;

   hours = t / seconds_per_hour;
   t -= hours * seconds_per_hour;

   minutes = t / seconds_per_minute;
   t -= minutes * seconds_per_minute;

   secs = t;
   t -= secs;

   msecs = 1e3 * t;
   usecs = 1e6 * t;

   for (f = fmt; *f; f++)
     {
       uword what, c;
       char *what_fmt = "%d";

       switch (c = *f)
 	{
 	default:
 	  vec_add1 (s, c);
 	  continue;

 	case 'd':
 	  what = days;
 	  what_fmt = "%d";
 	  break;
 	case 'h':
 	  what = hours;
 	  what_fmt = "%02d";
 	  break;
 	case 'm':
 	  what = minutes;
 	  what_fmt = "%02d";
 	  break;
 	case 's':
 	  what = secs;
 	  what_fmt = "%02d";
 	  break;
 	case 'f':
 	  what = msecs;
 	  what_fmt = "%03d";
 	  break;
 	case 'u':
 	  what = usecs;
 	  what_fmt = "%06d";
 	  break;
 	}

       s = format (s, what_fmt, what);
     }

   return s;
 }

 /* Format base 10 e.g. 100, 100K, 100M, 100G */
 __clib_export u8 *
 format_base10 (u8 *s, va_list *va)
 {
   uword size = va_arg (*va, uword);

   if (size < 1000)
     s = format (s, "%d", size);
   else if (size < 1000000)
     s = format (s, "%.2fK", (f64) size / 1000.);
   else if (size < 1000000000)
     s = format (s, "%.2fM", (f64) size / 1000000.);
   else
     s = format (s, "%.2fG", (f64) size / 1000000000.);

   return s;
 }

 /* Unparse memory size e.g. 100, 100k, 100m, 100g. */
 __clib_export u8 *
 format_memory_size (u8 * s, va_list * va)
 {
   uword size = va_arg (*va, uword);
   uword l, u, log_u;

   l = size > 0 ? min_log2 (size) : 0;
   if (l < 10)
     log_u = 0;
   else if (l < 20)
     log_u = 10;
   else if (l < 30)
     log_u = 20;
   else
     log_u = 30;

   u = (uword) 1 << log_u;
   if (size & (u - 1))
     s = format (s, "%.2f", (f64) size / (f64) u);
   else
     s = format (s, "%d", size >> log_u);

   if (log_u != 0)
     s = format (s, "%c", " kmg"[log_u / 10]);

   return s;
 }

 /* Parse memory size e.g. 100, 100k, 100m, 100g. */
 __clib_export uword
 unformat_memory_size (unformat_input_t * input, va_list * va)
 {
   uword amount, shift, c;
   uword *result = va_arg (*va, uword *);

   if (!unformat (input, "%wd%_", &amount))
     return 0;

   c = unformat_get_input (input);
   switch (c)
     {
     case 'k':
     case 'K':
       shift = 10;
       break;
     case 'm':
     case 'M':
       shift = 20;
       break;
     case 'g':
     case 'G':
       shift = 30;
       break;
     default:
       shift = 0;
       unformat_put_input (input);
       break;
     }

   *result = amount << shift;
   return 1;
 }

 /* Unparse memory page size e.g. 4K, 2M */
 __clib_export u8 *
 format_log2_page_size (u8 * s, va_list * va)
 {
   clib_mem_page_sz_t log2_page_sz = va_arg (*va, clib_mem_page_sz_t);

   if (log2_page_sz == CLIB_MEM_PAGE_SZ_UNKNOWN)
     return format (s, "unknown");

   if (log2_page_sz == CLIB_MEM_PAGE_SZ_DEFAULT)
     return format (s, "default");

   if (log2_page_sz == CLIB_MEM_PAGE_SZ_DEFAULT_HUGE)
     return format (s, "default-hugepage");

   if (log2_page_sz >= 30)
     return format (s, "%uG", 1 << (log2_page_sz - 30));

   if (log2_page_sz >= 20)
     return format (s, "%uM", 1 << (log2_page_sz - 20));

   if (log2_page_sz >= 10)
     return format (s, "%uK", 1 << (log2_page_sz - 10));

   return format (s, "%u", 1 << log2_page_sz);
 }

 /* Parse memory page size e.g. 4K, 2M */
 __clib_export uword
 unformat_log2_page_size (unformat_input_t * input, va_list * va)
 {
   uword amount;
   clib_mem_page_sz_t *result = va_arg (*va, clib_mem_page_sz_t *);

   if (unformat (input, "default-hugepage"))
     *result = CLIB_MEM_PAGE_SZ_DEFAULT_HUGE;
   else if (unformat (input, "default"))
     *result = CLIB_MEM_PAGE_SZ_DEFAULT;
   else if (unformat (input, "%wdk", &amount))
     *result = min_log2 (amount) + 10;
   else if (unformat (input, "%wdK", &amount))
     *result = min_log2 (amount) + 10;
   else if (unformat (input, "%wdm", &amount))
     *result = min_log2 (amount) + 20;
   else if (unformat (input, "%wdM", &amount))
     *result = min_log2 (amount) + 20;
   else if (unformat (input, "%wdg", &amount))
     *result = min_log2 (amount) + 30;
   else if (unformat (input, "%wdG", &amount))
     *result = min_log2 (amount) + 30;
   else
     return 0;
   return 1;
 }

 /* Format c identifier: e.g. a_name -> "a name".
    Works for both vector names and null terminated c strings. */
 __clib_export u8 *
 format_c_identifier (u8 * s, va_list * va)
 {
   u8 *id = va_arg (*va, u8 *);
   uword i, l;

   l = ~0;
   if (clib_mem_is_vec (id))
     l = vec_len (id);

   if (id)
     for (i = 0; i < l && id[i] != 0; i++)
       {
 	u8 c = id[i];

 	if (c == '_')
 	  c = ' ';
 	vec_add1 (s, c);
       }

   return s;
 }

 __clib_export u8 *
 format_hexdump (u8 * s, va_list * args)
 {
   u8 *data = va_arg (*args, u8 *);
   uword len = va_arg (*args, uword);
   int i, index = 0;
   const int line_len = 16;
   u8 *line_hex = 0;
   u8 *line_str = 0;
   u32 indent = format_get_indent (s);

   if (!len)
     return s;

   for (i = 0; i < len; i++)
     {
       line_hex = format (line_hex, "%02x ", data[i]);
       line_str = format (line_str, "%c", isprint (data[i]) ? data[i] : '.');
       if (!((i + 1) % line_len))
 	{
 	  s = format (s, "%U%05x: %v[%v]",
 		      format_white_space, index ? indent : 0,
 		      index, line_hex, line_str);
 	  if (i < len - 1)
 	    s = format (s, "\n");
 	  index = i + 1;
 	  vec_reset_length (line_hex);
 	  vec_reset_length (line_str);
 	}
     }

   while (i++ % line_len)
     line_hex = format (line_hex, "   ");

   if (vec_len (line_hex))
     s = format (s, "%U%05x: %v[%v]",
 		format_white_space, index ? indent : 0,
 		index, line_hex, line_str);

   vec_free (line_hex);
   vec_free (line_str);

   return s;
 }

 __clib_export u8 *
 format_u64_bitmap (u8 *s, va_list *args)
 {
   u64 *bitmap = va_arg (*args, u64 *);
   int n_uword = va_arg (*args, int);
   u32 indent = format_get_indent (s);

   s = format (s, "%6s", "");

   for (int i = 60; i >= 0; i -= 4)
     s = format (s, "%5d", i);

   vec_add1 (s, '\n');

   for (int j = n_uword - 1; j >= 0; j--)
     {
       s = format (s, "%U0x%04x ", format_white_space, indent, j * 8);
       for (int i = 63; i >= 0; i--)
 	{
 	  vec_add1 (s, (1ULL << i) & bitmap[j] ? '1' : '.');
 	  if (i % 4 == 0)
 	    vec_add1 (s, ' ');
 	}
       s = format (s, "0x%016lx", bitmap[j]);
       if (j)
 	vec_add1 (s, '\n');
     }

   return s;
 }

 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	* 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) 2001, 2002, 2003 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 <vppinfra/format.h>
	#include <ctype.h>

	/* Format vectors. */
	u8 *
	format_vec32 (u8 * s, va_list * va)
	{
	u32 v = va_arg (va, u32 *);
	char fmt = va_arg (va, char *);
	uword i;
	for (i = 0; i < vec_len (v); i++)
	{
	if (i > 0)
	s = format (s, ", ");
	s = format (s, fmt, v[i]);
	}
	return s;
	}

	u8 *
	format_vec_uword (u8 * s, va_list * va)
	{
	uword v = va_arg (va, uword *);
	char fmt = va_arg (va, char *);
	uword i;
	for (i = 0; i < vec_len (v); i++)
	{
	if (i > 0)
	s = format (s, ", ");
	s = format (s, fmt, v[i]);
	}
	return s;
	}

	/* Ascii buffer and length. */
	u8 *
	format_ascii_bytes (u8 * s, va_list * va)
	{
	u8 v = va_arg (va, u8 *);
	uword n_bytes = va_arg (*va, uword);
	vec_add (s, v, n_bytes);
	return s;
	}

	/* Format hex dump. */
	u8 *
	format_hex_bytes (u8 * s, va_list * va)
	{
	u8 bytes = va_arg (va, u8 *);
	int n_bytes = va_arg (*va, int);
	uword i;

	/* Print short or long form depending on byte count. */
	uword short_form = n_bytes <= 32;
	u32 indent = format_get_indent (s);

	if (n_bytes == 0)
	return s;

	for (i = 0; i < n_bytes; i++)
	{
	if (!short_form && (i % 32) == 0)
	s = format (s, "%08x: ", i);

	s = format (s, "%02x", bytes[i]);

	if (!short_form && ((i + 1) % 32) == 0 && (i + 1) < n_bytes)
	s = format (s, "\n%U", format_white_space, indent);
	}

	return s;
	}

	u8 *
	format_hex_bytes_no_wrap (u8 * s, va_list * va)
	{
	u8 bytes = va_arg (va, u8 *);
	int n_bytes = va_arg (*va, int);
	uword i;

	if (n_bytes == 0)
	return s;

	for (i = 0; i < n_bytes; i++)
	s = format (s, "%02x", bytes[i]);

	return s;
	}

	/* Add variable number of spaces. */
	u8 *
	format_white_space (u8 * s, va_list * va)
	{
	u32 n = va_arg (*va, u32);
	while (n-- > 0)
	vec_add1 (s, ' ');
	return s;
	}

	u8 *
	format_duration (u8 s, va_list args)
	{
	f64 t = va_arg (*args, f64);
	s = format (s, "");

	const f64 seconds_per_minute = 60;
	const f64 seconds_per_hour = 60 * seconds_per_minute;
	const f64 seconds_per_day = 24 * seconds_per_hour;
	uword days, hours, minutes, secs, msecs, usecs;

	days = t / seconds_per_day;
	t -= days * seconds_per_day;

	hours = t / seconds_per_hour;
	t -= hours * seconds_per_hour;

	minutes = t / seconds_per_minute;
	t -= minutes * seconds_per_minute;

	secs = t;
	t -= secs;

	msecs = 1e3 * t;

	usecs = 1e6 * t;
	usecs = usecs % 1000;

	if (t == 0.)
	s = format (s, "0");
	if (days)
	s = format (s, "%ddays ", days);
	if (hours)
	s = format (s, "%dh ", hours);
	if (minutes)
	s = format (s, "%dmin ", minutes);
	if (secs)
	s = format (s, "%ds ", secs);
	if (msecs)
	s = format (s, "%dms ", msecs);
	if (usecs)
	s = format (s, "%dus", usecs);

	return (s);
	}

	u8 *
	format_time_interval (u8 * s, va_list * args)
	{
	u8 fmt = va_arg (args, u8 *);
	f64 t = va_arg (*args, f64);
	u8 *f;

	const f64 seconds_per_minute = 60;
	const f64 seconds_per_hour = 60 * seconds_per_minute;
	const f64 seconds_per_day = 24 * seconds_per_hour;
	uword days, hours, minutes, secs, msecs, usecs;

	days = t / seconds_per_day;
	t -= days * seconds_per_day;

	hours = t / seconds_per_hour;
	t -= hours * seconds_per_hour;

	minutes = t / seconds_per_minute;
	t -= minutes * seconds_per_minute;

	secs = t;
	t -= secs;

	msecs = 1e3 * t;
	usecs = 1e6 * t;

	for (f = fmt; *f; f++)
	{
	uword what, c;
	char *what_fmt = "%d";

	switch (c = *f)
	{
	default:
	vec_add1 (s, c);
	continue;

	case 'd':
	what = days;
	what_fmt = "%d";
	break;
	case 'h':
	what = hours;
	what_fmt = "%02d";
	break;
	case 'm':
	what = minutes;
	what_fmt = "%02d";
	break;
	case 's':
	what = secs;
	what_fmt = "%02d";
	break;
	case 'f':
	what = msecs;
	what_fmt = "%03d";
	break;
	case 'u':
	what = usecs;
	what_fmt = "%06d";
	break;
	}

	s = format (s, what_fmt, what);
	}

	return s;
	}

	/* Format base 10 e.g. 100, 100K, 100M, 100G */
	__clib_export u8 *
	format_base10 (u8 s, va_list va)
	{
	uword size = va_arg (*va, uword);

	if (size < 1000)
	s = format (s, "%d", size);
	else if (size < 1000000)
	s = format (s, "%.2fK", (f64) size / 1000.);
	else if (size < 1000000000)
	s = format (s, "%.2fM", (f64) size / 1000000.);
	else
	s = format (s, "%.2fG", (f64) size / 1000000000.);

	return s;
	}

	/* Unparse memory size e.g. 100, 100k, 100m, 100g. */
	__clib_export u8 *
	format_memory_size (u8 * s, va_list * va)
	{
	uword size = va_arg (*va, uword);
	uword l, u, log_u;

	l = size > 0 ? min_log2 (size) : 0;
	if (l < 10)
	log_u = 0;
	else if (l < 20)
	log_u = 10;
	else if (l < 30)
	log_u = 20;
	else
	log_u = 30;

	u = (uword) 1 << log_u;
	if (size & (u - 1))
	s = format (s, "%.2f", (f64) size / (f64) u);
	else
	s = format (s, "%d", size >> log_u);

	if (log_u != 0)
	s = format (s, "%c", " kmg"[log_u / 10]);

	return s;
	}

	/* Parse memory size e.g. 100, 100k, 100m, 100g. */
	__clib_export uword
	unformat_memory_size (unformat_input_t * input, va_list * va)
	{
	uword amount, shift, c;
	uword result = va_arg (va, uword *);

	if (!unformat (input, "%wd%_", &amount))
	return 0;

	c = unformat_get_input (input);
	switch (c)
	{
	case 'k':
	case 'K':
	shift = 10;
	break;
	case 'm':
	case 'M':
	shift = 20;
	break;
	case 'g':
	case 'G':
	shift = 30;
	break;
	default:
	shift = 0;
	unformat_put_input (input);
	break;
	}

	*result = amount << shift;
	return 1;
	}

	/* Unparse memory page size e.g. 4K, 2M */
	__clib_export u8 *
	format_log2_page_size (u8 * s, va_list * va)
	{
	clib_mem_page_sz_t log2_page_sz = va_arg (*va, clib_mem_page_sz_t);

	if (log2_page_sz == CLIB_MEM_PAGE_SZ_UNKNOWN)
	return format (s, "unknown");

	if (log2_page_sz == CLIB_MEM_PAGE_SZ_DEFAULT)
	return format (s, "default");

	if (log2_page_sz == CLIB_MEM_PAGE_SZ_DEFAULT_HUGE)
	return format (s, "default-hugepage");

	if (log2_page_sz >= 30)
	return format (s, "%uG", 1 << (log2_page_sz - 30));

	if (log2_page_sz >= 20)
	return format (s, "%uM", 1 << (log2_page_sz - 20));

	if (log2_page_sz >= 10)
	return format (s, "%uK", 1 << (log2_page_sz - 10));

	return format (s, "%u", 1 << log2_page_sz);
	}

	/* Parse memory page size e.g. 4K, 2M */
	__clib_export uword
	unformat_log2_page_size (unformat_input_t * input, va_list * va)
	{
	uword amount;
	clib_mem_page_sz_t result = va_arg (va, clib_mem_page_sz_t *);

	if (unformat (input, "default-hugepage"))
	*result = CLIB_MEM_PAGE_SZ_DEFAULT_HUGE;
	else if (unformat (input, "default"))
	*result = CLIB_MEM_PAGE_SZ_DEFAULT;
	else if (unformat (input, "%wdk", &amount))
	*result = min_log2 (amount) + 10;
	else if (unformat (input, "%wdK", &amount))
	*result = min_log2 (amount) + 10;
	else if (unformat (input, "%wdm", &amount))
	*result = min_log2 (amount) + 20;
	else if (unformat (input, "%wdM", &amount))
	*result = min_log2 (amount) + 20;
	else if (unformat (input, "%wdg", &amount))
	*result = min_log2 (amount) + 30;
	else if (unformat (input, "%wdG", &amount))
	*result = min_log2 (amount) + 30;
	else
	return 0;
	return 1;
	}

	/* Format c identifier: e.g. a_name -> "a name".
	Works for both vector names and null terminated c strings. */
	__clib_export u8 *
	format_c_identifier (u8 * s, va_list * va)
	{
	u8 id = va_arg (va, u8 *);
	uword i, l;

	l = ~0;
	if (clib_mem_is_vec (id))
	l = vec_len (id);

	if (id)
	for (i = 0; i < l && id[i] != 0; i++)
	{
	u8 c = id[i];

	if (c == '_')
	c = ' ';
	vec_add1 (s, c);
	}

	return s;
	}

	__clib_export u8 *
	format_hexdump (u8 * s, va_list * args)
	{
	u8 data = va_arg (args, u8 *);
	uword len = va_arg (*args, uword);
	int i, index = 0;
	const int line_len = 16;
	u8 *line_hex = 0;
	u8 *line_str = 0;
	u32 indent = format_get_indent (s);

	if (!len)
	return s;

	for (i = 0; i < len; i++)
	{
	line_hex = format (line_hex, "%02x ", data[i]);
	line_str = format (line_str, "%c", isprint (data[i]) ? data[i] : '.');
	if (!((i + 1) % line_len))
	{
	s = format (s, "%U%05x: %v[%v]",
	format_white_space, index ? indent : 0,
	index, line_hex, line_str);
	if (i < len - 1)
	s = format (s, "\n");
	index = i + 1;
	vec_reset_length (line_hex);
	vec_reset_length (line_str);
	}
	}

	while (i++ % line_len)
	line_hex = format (line_hex, " ");

	if (vec_len (line_hex))
	s = format (s, "%U%05x: %v[%v]",
	format_white_space, index ? indent : 0,
	index, line_hex, line_str);

	vec_free (line_hex);
	vec_free (line_str);

	return s;
	}

	__clib_export u8 *
	format_u64_bitmap (u8 s, va_list args)
	{
	u64 bitmap = va_arg (args, u64 *);
	int n_uword = va_arg (*args, int);
	u32 indent = format_get_indent (s);

	s = format (s, "%6s", "");

	for (int i = 60; i >= 0; i -= 4)
	s = format (s, "%5d", i);

	vec_add1 (s, '\n');

	for (int j = n_uword - 1; j >= 0; j--)
	{
	s = format (s, "%U0x%04x ", format_white_space, indent, j * 8);
	for (int i = 63; i >= 0; i--)
	{
	vec_add1 (s, (1ULL << i) & bitmap[j] ? '1' : '.');
	if (i % 4 == 0)
	vec_add1 (s, ' ');
	}
	s = format (s, "0x%016lx", bitmap[j]);
	if (j)
	vec_add1 (s, '\n');
	}

	return s;
	}

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