mirror/labs-bird
1
0
Fork 0
mirror of https://gitlab.labs.nic.cz/labs/bird.git synced 2024-05-11 16:54:54 +00:00
Code Releases Activity

Filter: Add operators to find minimum and maximum element of sets

Browse Source 
Add operators .min and .max to find minumum or maximum element in sets
of types: clist, eclist, lclist. Example usage:

bgp_community.min
bgp_ext_community.max
filter(bgp_large_community, [(as1, as2, *)]).min

Signed-off-by: Alexander Zubkov <green@qrator.net>
This commit is contained in:
Alexander Zubkov
2021-12-28 04:05:05 +01:00
committed by Ondrej Zajicek (work)
parent e15e465720
commit 0e1fd7ea6a
7 changed files with 238 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

130
nest/a-set.c
View File

@@ -516,6 +516,48 @@ int_set_sort(struct linpool *pool, const struct adata *src)
return dst;
}
int
int_set_min(const struct adata *list, u32 *val)
{
if (!list)
return 0;
u32 *l = (u32 *) list->data;
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
*val = *l++;
for (i = 1; i < len; i++, l++)
if (int_set_cmp(val, l) > 0)
*val = *l;
return 1;
}
int
int_set_max(const struct adata *list, u32 *val)
{
if (!list)
return 0;
u32 *l = (u32 *) list->data;
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
*val = *l++;
for (i = 1; i < len; i++, l++)
if (int_set_cmp(val, l) < 0)
*val = *l;
return 1;
}
static int
ec_set_cmp(const void *X, const void *Y)
@@ -541,6 +583,50 @@ ec_set_sort_x(struct adata *set)
qsort(set->data, set->length / 8, 8, ec_set_cmp);
}
int
ec_set_min(const struct adata *list, u64 *val)
{
if (!list)
return 0;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
u32 *res = l; l += 2;
for (i = 2; i < len; i += 2, l += 2)
if (ec_set_cmp(res, l) > 0)
res = l;
*val = ec_generic(res[0], res[1]);
return 1;
}
int
ec_set_max(const struct adata *list, u64 *val)
{
if (!list)
return 0;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
u32 *res = l; l += 2;
for (i = 2; i < len; i += 2, l += 2)
if (ec_set_cmp(res, l) < 0)
res = l;
*val = ec_generic(res[0], res[1]);
return 1;
}
static int
lc_set_cmp(const void *X, const void *Y)
@@ -563,3 +649,47 @@ lc_set_sort(struct linpool *pool, const struct adata *src)
qsort(dst->data, dst->length / LCOMM_LENGTH, LCOMM_LENGTH, lc_set_cmp);
return dst;
}
int
lc_set_min(const struct adata *list, lcomm *val)
{
if (!list)
return 0;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
u32 *res = l; l += 3;
for (i = 3; i < len; i += 3, l += 3)
if (lc_set_cmp(res, l) > 0)
res = l;
*val = (lcomm) { res[0], res[1], res[2] };
return 1;
}
int
lc_set_max(const struct adata *list, lcomm *val)
{
if (!list)
return 0;
u32 *l = int_set_get_data(list);
int len = int_set_get_size(list);
int i;
if (len < 1)
return 0;
u32 *res = l; l += 3;
for (i = 3; i < len; i += 3, l += 3)
if (lc_set_cmp(res, l) < 0)
res = l;
*val = (lcomm) { res[0], res[1], res[2] };
return 1;
}

6
nest/attrs.h
View File

@@ -218,6 +218,12 @@ struct adata *ec_set_del_nontrans(struct linpool *pool, const struct adata *set)
struct adata *int_set_sort(struct linpool *pool, const struct adata *src);
struct adata *ec_set_sort(struct linpool *pool, const struct adata *src);
struct adata *lc_set_sort(struct linpool *pool, const struct adata *src);
int int_set_min(const struct adata *list, u32 *val);
int ec_set_min(const struct adata *list, u64 *val);
int lc_set_min(const struct adata *list, lcomm *val);
int int_set_max(const struct adata *list, u32 *val);
int ec_set_max(const struct adata *list, u64 *val);
int lc_set_max(const struct adata *list, lcomm *val);
void ec_set_sort_x(struct adata *set); /* Sort in place */