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authorDamjan Marion <damarion@cisco.com>2016-12-19 23:05:39 +0100
committerDamjan Marion <damarion@cisco.com>2016-12-28 12:25:14 +0100
commit7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 (patch)
tree5de62f8dbd3a752f5a676ca600e43d2652d1ff1a /src/vppinfra/bitmap.h
parent696f1adec0df3b8f161862566dd9c86174302658 (diff)
Reorganize source tree to use single autotools instance
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/bitmap.h')
-rw-r--r--src/vppinfra/bitmap.h774
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diff --git a/src/vppinfra/bitmap.h b/src/vppinfra/bitmap.h
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+/*
+ * 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, 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_bitmap_h
+#define included_clib_bitmap_h
+
+/** \file
+ Bitmaps built as vectors of machine words
+*/
+
+#include <vppinfra/vec.h>
+#include <vppinfra/random.h>
+#include <vppinfra/error.h>
+#include <vppinfra/bitops.h> /* for count_set_bits */
+
+typedef uword clib_bitmap_t;
+
+/** predicate function; is an entire bitmap empty?
+ @param ai - pointer to a bitmap
+ @returns 1 if the entire bitmap is zero, 0 otherwise
+*/
+always_inline uword
+clib_bitmap_is_zero (uword * ai)
+{
+ uword i;
+ for (i = 0; i < vec_len (ai); i++)
+ if (ai[i] != 0)
+ return 0;
+ return 1;
+}
+
+/** predicate function; are two bitmaps equal?
+ @param a - pointer to a bitmap
+ @param b - pointer to a bitmap
+ @returns 1 if the bitmaps are equal, 0 otherwise
+*/
+always_inline uword
+clib_bitmap_is_equal (uword * a, uword * b)
+{
+ uword i;
+ if (vec_len (a) != vec_len (b))
+ return 0;
+ for (i = 0; i < vec_len (a); i++)
+ if (a[i] != b[i])
+ return 0;
+ return 1;
+}
+
+/** Duplicate a bitmap
+ @param v - pointer to a bitmap
+ @returns a duplicate of the bitmap
+*/
+#define clib_bitmap_dup(v) vec_dup(v)
+
+/** Free a bitmap
+ @param v - pointer to the bitmap to free
+*/
+#define clib_bitmap_free(v) vec_free(v)
+
+/** Number of bytes in a bitmap
+ @param v - pointer to the bitmap
+*/
+#define clib_bitmap_bytes(v) vec_bytes(v)
+
+/** Clear a bitmap
+ @param v - pointer to the bitmap to clear
+*/
+#define clib_bitmap_zero(v) vec_zero(v)
+
+/** Allocate a bitmap with the supplied number of bits
+ @param [out] v - the resulting bitmap
+ @param n_bits - the required number of bits
+*/
+
+#define clib_bitmap_alloc(v,n_bits) \
+ v = vec_new (uword, ((n_bits) + BITS (uword) - 1) / BITS (uword))
+
+#define clib_bitmap_vec_validate(v,i) vec_validate_aligned((v),(i),sizeof(uword))
+
+/* Make sure that a bitmap is at least n_bits in size */
+#define clib_bitmap_validate(v,n_bits) \
+ clib_bitmap_vec_validate ((v), ((n_bits) - 1) / BITS (uword))
+
+/* low-level routine to remove trailing zeros from a bitmap */
+always_inline uword *
+_clib_bitmap_remove_trailing_zeros (uword * a)
+{
+ word i;
+ if (a)
+ {
+ for (i = _vec_len (a) - 1; i >= 0; i--)
+ if (a[i] != 0)
+ break;
+ _vec_len (a) = i + 1;
+ }
+ return a;
+}
+
+/** Sets the ith bit of a bitmap to new_value.
+ No sanity checking. Be careful.
+ @param a - pointer to the bitmap
+ @param i - the bit position to interrogate
+ @param new_value - new value for the bit
+ @returns the old value of the bit
+*/
+always_inline uword
+clib_bitmap_set_no_check (uword * a, uword i, uword new_value)
+{
+ uword i0 = i / BITS (a[0]);
+ uword i1 = i % BITS (a[0]);
+ uword bit = (uword) 1 << i1;
+ uword ai, old_value;
+
+ /* Removed ASSERT since uword * a may not be a vector. */
+ /* ASSERT (i0 < vec_len (a)); */
+
+ ai = a[i0];
+ old_value = (ai & bit) != 0;
+ ai &= ~bit;
+ ai |= ((uword) (new_value != 0)) << i1;
+ a[i0] = ai;
+ return old_value;
+}
+
+/** Sets the ith bit of a bitmap to new_value
+ Removes trailing zeros from the bitmap
+ @param ai - pointer to the bitmap
+ @param i - the bit position to interrogate
+ @param value - new value for the bit
+ @returns the old value of the bit
+*/
+always_inline uword *
+clib_bitmap_set (uword * ai, uword i, uword value)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ uword a;
+
+ /* Check for writing a zero to beyond end of bitmap. */
+ if (value == 0 && i0 >= vec_len (ai))
+ return ai; /* Implied trailing zeros. */
+
+ clib_bitmap_vec_validate (ai, i0);
+
+ a = ai[i0];
+ a &= ~((uword) 1 << i1);
+ a |= ((uword) (value != 0)) << i1;
+ ai[i0] = a;
+
+ /* If bits have been cleared, test for zero. */
+ if (a == 0)
+ ai = _clib_bitmap_remove_trailing_zeros (ai);
+
+ return ai;
+}
+
+/** Gets the ith bit value from a bitmap
+ @param ai - pointer to the bitmap
+ @param i - the bit position to interrogate
+ @returns the indicated bit value
+*/
+always_inline uword
+clib_bitmap_get (uword * ai, uword i)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ return i0 < vec_len (ai) && 0 != ((ai[i0] >> i1) & 1);
+}
+
+/** Gets the ith bit value from a bitmap
+ Does not sanity-check the bit position. Be careful.
+ @param ai - pointer to the bitmap
+ @param i - the bit position to interrogate
+ @returns the indicated bit value, or garbage if the bit position is
+ out of range.
+*/
+always_inline uword
+clib_bitmap_get_no_check (uword * ai, uword i)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ return 0 != ((ai[i0] >> i1) & 1);
+}
+
+always_inline uword
+clib_bitmap_get_multiple_no_check (uword * ai, uword i, uword n_bits)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ ASSERT (i1 + n_bits <= BITS (uword));
+ return 0 != ((ai[i0] >> i1) & pow2_mask (n_bits));
+}
+
+/** Gets the ith through ith + n_bits bit values from a bitmap
+ @param bitmap - pointer to the bitmap
+ @param i - the first bit position to retrieve
+ @param n_bits - the number of bit positions to retrieve
+ @returns the indicated range of bits
+*/
+always_inline uword
+clib_bitmap_get_multiple (uword * bitmap, uword i, uword n_bits)
+{
+ uword i0, i1, result;
+ uword l = vec_len (bitmap);
+
+ ASSERT (n_bits <= BITS (result));
+
+ i0 = i / BITS (bitmap[0]);
+ i1 = i % BITS (bitmap[0]);
+
+ /* Check first word. */
+ result = 0;
+ if (i0 < l)
+ {
+ result |= (bitmap[i0] >> i1);
+ if (n_bits < BITS (bitmap[0]))
+ result &= (((uword) 1 << n_bits) - 1);
+ }
+
+ /* Check for overlap into next word. */
+ i0++;
+ if (i1 + n_bits > BITS (bitmap[0]) && i0 < l)
+ {
+ n_bits -= BITS (bitmap[0]) - i1;
+ result |=
+ (bitmap[i0] & (((uword) 1 << n_bits) - 1)) << (BITS (bitmap[0]) - i1);
+ }
+
+ return result;
+}
+
+/** sets the ith through ith + n_bits bits in a bitmap
+ @param bitmap - pointer to the bitmap
+ @param i - the first bit position to retrieve
+ @param value - the values to set
+ @param n_bits - the number of bit positions to set
+ @returns a pointer to the updated bitmap, which may expand and move
+*/
+
+always_inline uword *
+clib_bitmap_set_multiple (uword * bitmap, uword i, uword value, uword n_bits)
+{
+ uword i0, i1, l, t, m;
+
+ ASSERT (n_bits <= BITS (value));
+
+ i0 = i / BITS (bitmap[0]);
+ i1 = i % BITS (bitmap[0]);
+
+ /* Allocate bitmap. */
+ clib_bitmap_vec_validate (bitmap, (i + n_bits) / BITS (bitmap[0]));
+ l = vec_len (bitmap);
+
+ m = ~0;
+ if (n_bits < BITS (value))
+ m = (((uword) 1 << n_bits) - 1);
+ value &= m;
+
+ /* Insert into first word. */
+ t = bitmap[i0];
+ t &= ~(m << i1);
+ t |= value << i1;
+ bitmap[i0] = t;
+
+ /* Insert into second word. */
+ i0++;
+ if (i1 + n_bits > BITS (bitmap[0]) && i0 < l)
+ {
+ t = BITS (bitmap[0]) - i1;
+ value >>= t;
+ n_bits -= t;
+ t = bitmap[i0];
+ m = ((uword) 1 << n_bits) - 1;
+ t &= ~m;
+ t |= value;
+ bitmap[i0] = t;
+ }
+
+ return bitmap;
+}
+
+always_inline uword *
+clfib_bitmap_set_region (uword * bitmap, uword i, uword value, uword n_bits)
+{
+ uword a0, a1, b0;
+ uword i_end, mask;
+
+ a0 = i / BITS (bitmap[0]);
+ a1 = i % BITS (bitmap[0]);
+
+ i_end = i + n_bits;
+ b0 = i_end / BITS (bitmap[0]);
+
+ clib_bitmap_vec_validate (bitmap, b0);
+
+ /* First word. */
+ mask = n_bits < BITS (bitmap[0]) ? pow2_mask (n_bits) : ~0;
+ mask <<= a1;
+
+ if (value)
+ bitmap[a0] |= mask;
+ else
+ bitmap[a0] &= ~mask;
+
+ for (a0++; a0 < b0; a0++)
+ bitmap[a0] = value ? ~0 : 0;
+
+ if (a0 == b0)
+ {
+ word n_bits_left = n_bits - (BITS (bitmap[0]) - a1);
+ mask = pow2_mask (n_bits_left);
+ if (value)
+ bitmap[a0] |= mask;
+ else
+ bitmap[a0] &= ~mask;
+ }
+
+ return bitmap;
+}
+
+/** Macro to iterate across set bits in a bitmap
+
+ @param i - the current set bit
+ @param ai - the bitmap
+ @param body - the expression to evaluate for each set bit
+*/
+#define clib_bitmap_foreach(i,ai,body) \
+do { \
+ uword __bitmap_i, __bitmap_ai, __bitmap_len, __bitmap_first_set; \
+ __bitmap_len = vec_len ((ai)); \
+ for (__bitmap_i = 0; __bitmap_i < __bitmap_len; __bitmap_i++) \
+ { \
+ __bitmap_ai = (ai)[__bitmap_i]; \
+ while (__bitmap_ai != 0) \
+ { \
+ __bitmap_first_set = first_set (__bitmap_ai); \
+ (i) = (__bitmap_i * BITS ((ai)[0]) \
+ + min_log2 (__bitmap_first_set)); \
+ do { body; } while (0); \
+ __bitmap_ai ^= __bitmap_first_set; \
+ } \
+ } \
+} while (0)
+
+
+/** Return the lowest numbered set bit in a bitmap
+ @param ai - pointer to the bitmap
+ @returns lowest numbered set bit, or ~0 if the entire bitmap is zero
+*/
+always_inline uword
+clib_bitmap_first_set (uword * ai)
+{
+ uword i;
+ for (i = 0; i < vec_len (ai); i++)
+ {
+ uword x = ai[i];
+ if (x != 0)
+ return i * BITS (ai[0]) + log2_first_set (x);
+ }
+ return ~0;
+}
+
+/** Return the higest numbered set bit in a bitmap
+ @param ai - pointer to the bitmap
+ @returns lowest numbered set bit, or ~0 if the entire bitmap is zero
+*/
+always_inline uword
+clib_bitmap_last_set (uword * ai)
+{
+ uword i;
+
+ for (i = vec_len (ai); i > 0; i--)
+ {
+ uword x = ai[i - 1];
+ if (x != 0)
+ {
+ uword first_bit;
+ count_leading_zeros (first_bit, x);
+ return (i) * BITS (ai[0]) - first_bit - 1;
+ }
+ }
+ return ~0;
+}
+
+/** Return the lowest numbered clear bit in a bitmap
+ @param ai - pointer to the bitmap
+ @returns lowest numbered clear bit
+*/
+always_inline uword
+clib_bitmap_first_clear (uword * ai)
+{
+ uword i;
+ for (i = 0; i < vec_len (ai); i++)
+ {
+ uword x = ~ai[i];
+ if (x != 0)
+ return i * BITS (ai[0]) + log2_first_set (x);
+ }
+ return i * BITS (ai[0]);
+}
+
+/** Return the number of set bits in a bitmap
+ @param ai - pointer to the bitmap
+ @returns the number of set bits in the bitmap
+*/
+always_inline uword
+clib_bitmap_count_set_bits (uword * ai)
+{
+ uword i;
+ uword n_set = 0;
+ for (i = 0; i < vec_len (ai); i++)
+ n_set += count_set_bits (ai[i]);
+ return n_set;
+}
+
+/** Logical operator across two bitmaps
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns ai = ai and bi. ai is modified, bi is not modified
+*/
+always_inline uword *clib_bitmap_and (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns ai = ai & ~bi. ai is modified, bi is not modified
+*/
+always_inline uword *clib_bitmap_andnot (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns ai = ai & ~bi. ai is modified, bi is not modified
+*/
+always_inline uword *clib_bitmap_or (uword * ai, uword * bi);
+/** Logical operator across two bitmaps
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns ai = ai or bi. ai is modified, bi is not modified
+*/
+always_inline uword *clib_bitmap_or (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns ai = ai xor bi. ai is modified, bi is not modified
+*/
+always_inline uword *clib_bitmap_xor (uword * ai, uword * bi);
+
+/* ALU function definition macro for functions taking two bitmaps. */
+#define _(name, body, check_zero) \
+always_inline uword * \
+clib_bitmap_##name (uword * ai, uword * bi) \
+{ \
+ uword i, a, b, bi_len, n_trailing_zeros; \
+ \
+ n_trailing_zeros = 0; \
+ bi_len = vec_len (bi); \
+ if (bi_len > 0) \
+ clib_bitmap_vec_validate (ai, bi_len - 1); \
+ for (i = 0; i < vec_len (ai); i++) \
+ { \
+ a = ai[i]; \
+ b = i < bi_len ? bi[i] : 0; \
+ do { body; } while (0); \
+ ai[i] = a; \
+ if (check_zero) \
+ n_trailing_zeros = a ? 0 : (n_trailing_zeros + 1); \
+ } \
+ if (check_zero) \
+ _vec_len (ai) -= n_trailing_zeros; \
+ return ai; \
+}
+
+/* ALU functions: */
+_(and, a = a & b, 1)
+_(andnot, a = a & ~b, 1) _(or, a = a | b, 0) _(xor, a = a ^ b, 1)
+#undef _
+/** Logical operator across two bitmaps which duplicates the first bitmap
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns aiDup = ai and bi. Neither ai nor bi are modified
+*/
+ always_inline uword *
+ clib_bitmap_dup_and (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps which duplicates the first bitmap
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns aiDup = ai & ~bi. Neither ai nor bi are modified
+*/
+ always_inline uword *
+ clib_bitmap_dup_andnot (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps which duplicates the first bitmap
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns aiDup = ai or bi. Neither ai nor bi are modified
+*/
+ always_inline uword *
+ clib_bitmap_dup_or (uword * ai, uword * bi);
+
+/** Logical operator across two bitmaps which duplicates the first bitmap
+
+ @param ai - pointer to the destination bitmap
+ @param bi - pointer to the source bitmap
+ @returns aiDup = ai xor bi. Neither ai nor bi are modified
+*/
+ always_inline uword *
+ clib_bitmap_dup_xor (uword * ai, uword * bi);
+
+#define _(name) \
+ always_inline uword * \
+ clib_bitmap_dup_##name (uword * ai, uword * bi) \
+{ return clib_bitmap_##name (clib_bitmap_dup (ai), bi); }
+
+_(and);
+_(andnot);
+_(or);
+_(xor);
+
+#undef _
+
+/* ALU function definition macro for functions taking one bitmap and an immediate. */
+#define _(name, body, check_zero) \
+always_inline uword * \
+clib_bitmap_##name (uword * ai, uword i) \
+{ \
+ uword i0 = i / BITS (ai[0]); \
+ uword i1 = i % BITS (ai[0]); \
+ uword a, b; \
+ clib_bitmap_vec_validate (ai, i0); \
+ a = ai[i0]; \
+ b = (uword) 1 << i1; \
+ do { body; } while (0); \
+ ai[i0] = a; \
+ if (check_zero && a == 0) \
+ ai = _clib_bitmap_remove_trailing_zeros (ai); \
+ return ai; \
+}
+
+/* ALU functions immediate: */
+_(andi, a = a & b, 1)
+_(andnoti, a = a & ~b, 1) _(ori, a = a | b, 0) _(xori, a = a ^ b, 1)
+#undef _
+/** Return a random bitmap of the requested length
+ @param ai - pointer to the destination bitmap
+ @param n_bits - number of bits to allocate
+ @param [in,out] seed - pointer to the random number seed
+ @returns a reasonably random bitmap based. See random.h.
+*/
+ always_inline uword *
+ clib_bitmap_random (uword * ai, uword n_bits, u32 * seed)
+{
+ vec_reset_length (ai);
+
+ if (n_bits > 0)
+ {
+ uword i = n_bits - 1;
+ uword i0, i1;
+ uword log2_rand_max;
+
+ log2_rand_max = min_log2 (random_u32_max ());
+
+ i0 = i / BITS (ai[0]);
+ i1 = i % BITS (ai[0]);
+
+ clib_bitmap_vec_validate (ai, i0);
+ for (i = 0; i <= i0; i++)
+ {
+ uword n;
+ for (n = 0; n < BITS (ai[i]); n += log2_rand_max)
+ ai[i] |= random_u32 (seed) << n;
+ }
+ if (i1 + 1 < BITS (ai[0]))
+ ai[i0] &= (((uword) 1 << (i1 + 1)) - 1);
+ }
+ return ai;
+}
+
+/** Return the next set bit in a bitmap starting at bit i
+ @param ai - pointer to the bitmap
+ @param i - first bit position to test
+ @returns first set bit position at or after i,
+ ~0 if no further set bits are found
+*/
+always_inline uword
+clib_bitmap_next_set (uword * ai, uword i)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ uword t;
+
+ if (i0 < vec_len (ai))
+ {
+ t = (ai[i0] >> i1) << i1;
+ if (t)
+ return log2_first_set (t) + i0 * BITS (ai[0]);
+
+ for (i0++; i0 < vec_len (ai); i0++)
+ {
+ t = ai[i0];
+ if (t)
+ return log2_first_set (t) + i0 * BITS (ai[0]);
+ }
+ }
+
+ return ~0;
+}
+
+/** Return the next clear bit in a bitmap starting at bit i
+ @param ai - pointer to the bitmap
+ @param i - first bit position to test
+ @returns first clear bit position at or after i
+*/
+always_inline uword
+clib_bitmap_next_clear (uword * ai, uword i)
+{
+ uword i0 = i / BITS (ai[0]);
+ uword i1 = i % BITS (ai[0]);
+ uword t;
+
+ if (i0 < vec_len (ai))
+ {
+ t = (~ai[i0] >> i1) << i1;
+ if (t)
+ return log2_first_set (t) + i0 * BITS (ai[0]);
+
+ for (i0++; i0 < vec_len (ai); i0++)
+ {
+ t = ~ai[i0];
+ if (t)
+ return log2_first_set (t) + i0 * BITS (ai[0]);
+ }
+ }
+ return i;
+}
+
+/** 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
+*/
+static inline 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
+*/
+static inline 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;
+}
+#endif /* included_clib_bitmap_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */