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MINOR: pattern: add pat_ref_gen_find_elt() function

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pat_ref_gen_find_elt(ref, gen_id, key) tries to find <elt> element
belonging to <gen_id> and matching <key> in <ref> reference.

The goal is to be able to target a single subset from <ref>
This commit is contained in:
Aurelien DARRAGON 2024-11-20 18:07:52 +01:00
parent c9d6af3c6d
commit a131c542a6
2 changed files with 23 additions and 0 deletions
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1
include/haproxy/pattern.h
View File

@ -184,6 +184,7 @@ struct pat_ref *pat_ref_lookupid(int unique_id);
struct pat_ref *pat_ref_new(const char *reference, const char *display, unsigned int flags); struct pat_ref *pat_ref_new(const char *reference, const char *display, unsigned int flags);
struct pat_ref *pat_ref_newid(int unique_id, const char *display, unsigned int flags); struct pat_ref *pat_ref_newid(int unique_id, const char *display, unsigned int flags);
struct pat_ref_elt *pat_ref_find_elt(struct pat_ref *ref, const char *key); struct pat_ref_elt *pat_ref_find_elt(struct pat_ref *ref, const char *key);
struct pat_ref_elt *pat_ref_gen_find_elt(struct pat_ref *ref, unsigned int gen_id, const char *key);
struct pat_ref_elt *pat_ref_append(struct pat_ref *ref, const char *pattern, const char *sample, int line); struct pat_ref_elt *pat_ref_append(struct pat_ref *ref, const char *pattern, const char *sample, int line);
struct pat_ref_elt *pat_ref_load(struct pat_ref *ref, unsigned int gen, const char *pattern, const char *sample, int line, char **err); struct pat_ref_elt *pat_ref_load(struct pat_ref *ref, unsigned int gen, const char *pattern, const char *sample, int line, char **err);
int pat_ref_push(struct pat_ref_elt *elt, struct pattern_expr *expr, int patflags, char **err); int pat_ref_push(struct pat_ref_elt *elt, struct pattern_expr *expr, int patflags, char **err);

22
src/pattern.c
View File

@ -1636,6 +1636,28 @@ int pat_ref_delete(struct pat_ref *ref, const char *key)
return found; return found;
} }
/*
* find and return an element <elt> belonging to <gen_id> and matching <key> in a
* reference <ref> return NULL if not found
*/
struct pat_ref_elt *pat_ref_gen_find_elt(struct pat_ref *ref, unsigned int gen_id, const char *key)
{
struct ebmb_node *node;
struct pat_ref_elt *elt;
node = ebst_lookup(&ref->ebmb_root, key);
while (node) {
elt = ebmb_entry(node, struct pat_ref_elt, node);
if (elt->gen_id == gen_id)
break;
node = ebmb_next_dup(node);
}
if (node)
return ebmb_entry(node, struct pat_ref_elt, node);
return NULL;
}
/* /*
* find and return an element <elt> matching <key> in a reference <ref> * find and return an element <elt> matching <key> in a reference <ref>
* return NULL if not found * return NULL if not found