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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2021 Cisco Systems, Inc.
*/
#include <vppinfra/vec.h>
#include <vppinfra/bitmap.h>
/** unformat an any sized hexadecimal bitmask into a bitmap
uword * bitmap;
rv = unformat ("%U", unformat_bitmap_mask, &bitmap);
Standard unformat_function_t arguments
@param input - pointer an unformat_input_t
@param va - varargs list comprising a single uword **
@returns 1 on success, 0 on failure
*/
__clib_export uword
unformat_bitmap_mask (unformat_input_t *input, va_list *va)
{
u8 *v = 0; /* hexadecimal vector */
uword **bitmap_return = va_arg (*va, uword **);
uword *bitmap = 0;
if (unformat (input, "%U", unformat_hex_string, &v))
{
int i, s = vec_len (v) - 1; /* 's' for significance or shift */
/* v[0] holds the most significant byte */
for (i = 0; s >= 0; i++, s--)
bitmap = clib_bitmap_set_multiple (bitmap, s * BITS (v[i]), v[i],
BITS (v[i]));
vec_free (v);
*bitmap_return = bitmap;
return 1;
}
return 0;
}
/** unformat a list of bit ranges into a bitmap (eg "0-3,5-7,11" )
uword * bitmap;
rv = unformat ("%U", unformat_bitmap_list, &bitmap);
Standard unformat_function_t arguments
@param input - pointer an unformat_input_t
@param va - varargs list comprising a single uword **
@returns 1 on success, 0 on failure
*/
__clib_export uword
unformat_bitmap_list (unformat_input_t *input, va_list *va)
{
uword **bitmap_return = va_arg (*va, uword **);
uword *bitmap = 0;
u32 a, b;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
int i;
if (unformat (input, "%u-%u,", &a, &b))
;
else if (unformat (input, "%u,", &a))
b = a;
else if (unformat (input, "%u-%u", &a, &b))
;
else if (unformat (input, "%u", &a))
b = a;
else if (bitmap)
{
unformat_put_input (input);
break;
}
else
goto error;
if (b < a)
goto error;
for (i = a; i <= b; i++)
bitmap = clib_bitmap_set (bitmap, i, 1);
}
*bitmap_return = bitmap;
return 1;
error:
clib_bitmap_free (bitmap);
return 0;
}
/** Format a bitmap as a string of hex bytes
uword * bitmap;
s = format ("%U", format_bitmap_hex, bitmap);
Standard format_function_t arguments
@param s - string under construction
@param args - varargs list comprising a single uword *
@returns string under construction
*/
__clib_export u8 *
format_bitmap_hex (u8 *s, va_list *args)
{
uword *bitmap = va_arg (*args, uword *);
int i, is_trailing_zero = 1;
if (!bitmap)
return format (s, "0");
i = vec_bytes (bitmap) * 2;
while (i > 0)
{
u8 x = clib_bitmap_get_multiple (bitmap, --i * 4, 4);
if (x && is_trailing_zero)
is_trailing_zero = 0;
if (x || !is_trailing_zero)
s = format (s, "%x", x);
}
return s;
}
/** Format a bitmap as a list
uword * bitmap;
s = format ("%U", format_bitmap_list, bitmap);
Standard format_function_t arguments
@param s - string under construction
@param args - varargs list comprising a single uword *
@returns string under construction
*/
__clib_export u8 *
format_bitmap_list (u8 *s, va_list *args)
{
uword *bitmap = va_arg (*args, uword *);
uword fs, fc;
if (!bitmap)
return s;
fs = clib_bitmap_first_set (bitmap);
if (fs == ~0)
return s;
while (1)
{
fc = clib_bitmap_next_clear (bitmap, fs + 1);
if (fc > fs + 1)
s = format (s, "%lu-%lu", fs, fc - 1);
else
s = format (s, "%lu", fs);
if ((fs = clib_bitmap_next_set (bitmap, fc)) == ~0)
return s;
s = format (s, ", ");
}
}
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