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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_STRFILTER_H
#define __PERF_STRFILTER_H
/* General purpose glob matching filter */
#include <linux/list.h>
#include <stdbool.h>
/* A node of string filter */
struct strfilter_node {
struct strfilter_node *l; /* Tree left branch (for &,|) */
struct strfilter_node *r; /* Tree right branch (for !,&,|) */
const char *p; /* Operator or rule */
};
/* String filter */
struct strfilter {
struct strfilter_node *root;
};
/**
* strfilter__new - Create a new string filter
* @rules: Filter rule, which is a combination of glob expressions.
* @err: Pointer which points an error detected on @rules
*
* Parse @rules and return new strfilter. Return NULL if an error detected.
* In that case, *@err will indicate where it is detected, and *@err is NULL
* if a memory allocation is failed.
*/
struct strfilter *strfilter__new(const char *rules, const char **err);
/**
* strfilter__or - Append an additional rule by logical-or
* @filter: Original string filter
* @rules: Filter rule to be appended at left of the root of
* @filter by using logical-or.
* @err: Pointer which points an error detected on @rules
*
* Parse @rules and join it to the @filter by using logical-or.
* Return 0 if success, or return the error code.
*/
int strfilter__or(struct strfilter *filter,
const char *rules, const char **err);
/**
* strfilter__add - Append an additional rule by logical-and
* @filter: Original string filter
* @rules: Filter rule to be appended at left of the root of
* @filter by using logical-and.
* @err: Pointer which points an error detected on @rules
*
* Parse @rules and join it to the @filter by using logical-and.
* Return 0 if success, or return the error code.
*/
int strfilter__and(struct strfilter *filter,
const char *rules, const char **err);
/**
* strfilter__compare - compare given string and a string filter
* @filter: String filter
* @str: target string
*
* Compare @str and @filter. Return true if the str match the rule
*/
bool strfilter__compare(struct strfilter *filter, const char *str);
/**
* strfilter__delete - delete a string filter
* @filter: String filter to delete
*
* Delete @filter.
*/
void strfilter__delete(struct strfilter *filter);
/**
* strfilter__string - Reconstruct a rule string from filter
* @filter: String filter to reconstruct
*
* Reconstruct a rule string from @filter. This will be good for
* debug messages. Note that returning string must be freed afterward.
*/
char *strfilter__string(struct strfilter *filter);
#endif
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