mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/*
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* Declarations for System V style searching functions.
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* Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
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* This file is part of the GNU C Library.
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*/
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/*
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* Based on code from uClibc-0.9.30.3
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* Extensions for use within U-Boot
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* Copyright (C) 2010-2013 Wolfgang Denk <wd@denx.de>
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*/
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#ifndef _SEARCH_H_
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#define _SEARCH_H_
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#include <stddef.h>
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#define __set_errno(val) do { errno = val; } while (0)
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enum env_op {
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env_op_create,
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env_op_delete,
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env_op_overwrite,
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};
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/* Action which shall be performed in the call to hsearch. */
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typedef enum {
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FIND,
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ENTER
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} ACTION;
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typedef struct entry {
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const char *key;
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char *data;
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int (*callback)(const char *name, const char *value, enum env_op op,
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int flags);
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int flags;
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} ENTRY;
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/* Opaque type for internal use. */
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struct _ENTRY;
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/*
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* Family of hash table handling functions. The functions also
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* have reentrant counterparts ending with _r. The non-reentrant
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* functions all work on a single internal hash table.
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*/
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/* Data type for reentrant functions. */
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struct hsearch_data {
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struct _ENTRY *table;
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unsigned int size;
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unsigned int filled;
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/*
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* Callback function which will check whether the given change for variable
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* "__item" to "newval" may be applied or not, and possibly apply such change.
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* When (flag & H_FORCE) is set, it shall not print out any error message and
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* shall force overwriting of write-once variables.
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* Must return 0 for approval, 1 for denial.
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*/
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int (*change_ok)(const ENTRY *__item, const char *newval, enum env_op,
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int flag);
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};
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/* Create a new hash table which will contain at most "__nel" elements. */
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extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
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/* Destroy current internal hash table. */
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extern void hdestroy_r(struct hsearch_data *__htab);
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/*
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* Search for entry matching __item.key in internal hash table. If
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* ACTION is `FIND' return found entry or signal error by returning
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* NULL. If ACTION is `ENTER' replace existing data (if any) with
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* __item.data.
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* */
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extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval,
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struct hsearch_data *__htab, int __flag);
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/*
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* Search for an entry matching "__match". Otherwise, Same semantics
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* as hsearch_r().
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*/
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extern int hmatch_r(const char *__match, int __last_idx, ENTRY ** __retval,
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struct hsearch_data *__htab);
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/* Search and delete entry matching "__key" in internal hash table. */
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extern int hdelete_r(const char *__key, struct hsearch_data *__htab,
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int __flag);
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extern ssize_t hexport_r(struct hsearch_data *__htab,
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const char __sep, int __flag, char **__resp, size_t __size,
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int argc, char * const argv[]);
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/*
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* nvars: length of vars array
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* vars: array of strings (variable names) to import (nvars == 0 means all)
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*/
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extern int himport_r(struct hsearch_data *__htab,
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const char *__env, size_t __size, const char __sep,
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int __flag, int __crlf_is_lf, int nvars,
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char * const vars[]);
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/* Walk the whole table calling the callback on each element */
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extern int hwalk_r(struct hsearch_data *__htab, int (*callback)(ENTRY *));
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/* Flags for himport_r(), hexport_r(), hdelete_r(), and hsearch_r() */
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#define H_NOCLEAR (1 << 0) /* do not clear hash table before importing */
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#define H_FORCE (1 << 1) /* overwrite read-only/write-once variables */
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#define H_INTERACTIVE (1 << 2) /* indicate that an import is user directed */
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#define H_HIDE_DOT (1 << 3) /* don't print env vars that begin with '.' */
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#define H_MATCH_KEY (1 << 4) /* search/grep key = variable names */
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#define H_MATCH_DATA (1 << 5) /* search/grep data = variable values */
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#define H_MATCH_BOTH (H_MATCH_KEY | H_MATCH_DATA) /* search/grep both */
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#define H_MATCH_IDENT (1 << 6) /* search for indentical strings */
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#define H_MATCH_SUBSTR (1 << 7) /* search for substring matches */
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#define H_MATCH_REGEX (1 << 8) /* search for regular expression matches */
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#define H_MATCH_METHOD (H_MATCH_IDENT | H_MATCH_SUBSTR | H_MATCH_REGEX)
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#define H_PROGRAMMATIC (1 << 9) /* indicate that an import is from env_set() */
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#define H_ORIGIN_FLAGS (H_INTERACTIVE | H_PROGRAMMATIC)
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#endif /* _SEARCH_H_ */
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