mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-25 18:18:19 +01:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
/*
|
|
* Declarations for System V style searching functions.
|
|
* Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
|
|
* This file is part of the GNU C Library.
|
|
*/
|
|
|
|
/*
|
|
* Based on code from uClibc-0.9.30.3
|
|
* Extensions for use within U-Boot
|
|
* Copyright (C) 2010-2013 Wolfgang Denk <wd@denx.de>
|
|
*/
|
|
|
|
#ifndef _SEARCH_H_
|
|
#define _SEARCH_H_
|
|
|
|
#include <env.h>
|
|
#include <stddef.h>
|
|
|
|
#define set_errno(val) do { errno = val; } while (0)
|
|
|
|
/* enum env_action: action which shall be performed in the call to hsearch */
|
|
enum env_action {
|
|
ENV_FIND,
|
|
ENV_ENTER,
|
|
};
|
|
|
|
/** struct env_entry - An entry in the environment hashtable */
|
|
struct env_entry {
|
|
const char *key;
|
|
char *data;
|
|
#ifndef CONFIG_SPL_BUILD
|
|
int (*callback)(const char *name, const char *value, enum env_op op,
|
|
int flags);
|
|
#endif
|
|
int flags;
|
|
};
|
|
|
|
/*
|
|
* Family of hash table handling functions. The functions also
|
|
* have reentrant counterparts ending with _r. The non-reentrant
|
|
* functions all work on a single internal hash table.
|
|
*/
|
|
|
|
/* Data type for reentrant functions. */
|
|
struct hsearch_data {
|
|
struct env_entry_node *table;
|
|
unsigned int size;
|
|
unsigned int filled;
|
|
/*
|
|
* Callback function which will check whether the given change for variable
|
|
* "item" to "newval" may be applied or not, and possibly apply such change.
|
|
* When (flag & H_FORCE) is set, it shall not print out any error message and
|
|
* shall force overwriting of write-once variables.
|
|
* Must return 0 for approval, 1 for denial.
|
|
*/
|
|
int (*change_ok)(const struct env_entry *item, const char *newval,
|
|
enum env_op, int flag);
|
|
};
|
|
|
|
/* Create a new hash table which will contain at most "nel" elements. */
|
|
int hcreate_r(size_t nel, struct hsearch_data *htab);
|
|
|
|
/* Destroy current internal hash table. */
|
|
void hdestroy_r(struct hsearch_data *htab);
|
|
|
|
/*
|
|
* Search for entry matching item.key in internal hash table. If
|
|
* action is `ENV_FIND' return found entry or signal error by returning
|
|
* NULL. If action is `ENV_ENTER' replace existing data (if any) with
|
|
* item.data.
|
|
* */
|
|
int hsearch_r(struct env_entry item, enum env_action action,
|
|
struct env_entry **retval, struct hsearch_data *htab, int flag);
|
|
|
|
/*
|
|
* Search for an entry matching "match". Otherwise, Same semantics
|
|
* as hsearch_r().
|
|
*/
|
|
int hmatch_r(const char *match, int last_idx, struct env_entry **retval,
|
|
struct hsearch_data *htab);
|
|
|
|
/**
|
|
* hdelete_r() - Search and delete entry in internal hash table
|
|
*
|
|
* @key: Name of entry to delete
|
|
* @htab: Hash table
|
|
* @flag: Flags to use (H_...)
|
|
* Return: 0 on success, -ENOENT if not found, -EPERM if the hash table callback
|
|
* rejected changing the variable, -EINVAL if the hash table refused to
|
|
* delete the variable
|
|
*/
|
|
int hdelete_r(const char *key, struct hsearch_data *htab, int flag);
|
|
|
|
ssize_t hexport_r(struct hsearch_data *htab, const char sep, int flag,
|
|
char **resp, size_t size, int argc, char *const argv[]);
|
|
|
|
/*
|
|
* nvars: length of vars array
|
|
* vars: array of strings (variable names) to import (nvars == 0 means all)
|
|
*/
|
|
int himport_r(struct hsearch_data *htab, const char *env, size_t size,
|
|
const char sep, int flag, int crlf_is_lf, int nvars,
|
|
char * const vars[]);
|
|
|
|
/* Walk the whole table calling the callback on each element */
|
|
int hwalk_r(struct hsearch_data *htab,
|
|
int (*callback)(struct env_entry *entry));
|
|
|
|
/* Flags for himport_r(), hexport_r(), hdelete_r(), and hsearch_r() */
|
|
#define H_NOCLEAR (1 << 0) /* do not clear hash table before importing */
|
|
#define H_FORCE (1 << 1) /* overwrite read-only/write-once variables */
|
|
#define H_INTERACTIVE (1 << 2) /* indicate that an import is user directed */
|
|
#define H_HIDE_DOT (1 << 3) /* don't print env vars that begin with '.' */
|
|
#define H_MATCH_KEY (1 << 4) /* search/grep key = variable names */
|
|
#define H_MATCH_DATA (1 << 5) /* search/grep data = variable values */
|
|
#define H_MATCH_BOTH (H_MATCH_KEY | H_MATCH_DATA) /* search/grep both */
|
|
#define H_MATCH_IDENT (1 << 6) /* search for indentical strings */
|
|
#define H_MATCH_SUBSTR (1 << 7) /* search for substring matches */
|
|
#define H_MATCH_REGEX (1 << 8) /* search for regular expression matches */
|
|
#define H_MATCH_METHOD (H_MATCH_IDENT | H_MATCH_SUBSTR | H_MATCH_REGEX)
|
|
#define H_PROGRAMMATIC (1 << 9) /* indicate that an import is from env_set() */
|
|
#define H_ORIGIN_FLAGS (H_INTERACTIVE | H_PROGRAMMATIC)
|
|
#define H_DEFAULT (1 << 10) /* indicate that an import is default env */
|
|
#define H_EXTERNAL (1 << 11) /* indicate that an import is external env */
|
|
|
|
#endif /* _SEARCH_H_ */
|