X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=include%2Fsearch.h;h=df5d61c2eb884b1f49f35a60cc546bce435efc55;hb=0f44d33536a50ef65259c322fa2d4a058585caf9;hp=81ced7f48e68ecf89137744040523d1fd7d4f7f1;hpb=cdc51c294ad33879c4e57edf4c9d2155381b1d59;p=people%2Fms%2Fu-boot.git diff --git a/include/search.h b/include/search.h index 81ced7f48e..df5d61c2eb 100644 --- a/include/search.h +++ b/include/search.h @@ -3,44 +3,40 @@ * Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc. * This file is part of the GNU C Library. * - * The GNU C Library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * The GNU C Library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with the GNU C Library; if not, write to the Free - * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - * 02111-1307 USA. + * SPDX-License-Identifier: LGPL-2.1+ */ /* * Based on code from uClibc-0.9.30.3 * Extensions for use within U-Boot - * Copyright (C) 2010 Wolfgang Denk + * Copyright (C) 2010-2013 Wolfgang Denk */ -#ifndef _SEARCH_H -#define _SEARCH_H 1 +#ifndef _SEARCH_H_ +#define _SEARCH_H_ #include #define __set_errno(val) do { errno = val; } while (0) -/* Action which shall be performed in the call the hsearch. */ +enum env_op { + env_op_create, + env_op_delete, + env_op_overwrite, +}; + +/* Action which shall be performed in the call to hsearch. */ typedef enum { FIND, ENTER } ACTION; typedef struct entry { - char *key; + const char *key; char *data; + int (*callback)(const char *name, const char *value, enum env_op op, + int flags); + int flags; } ENTRY; /* Opaque type for internal use. */ @@ -49,7 +45,7 @@ struct _ENTRY; /* * Family of hash table handling functions. The functions also * have reentrant counterparts ending with _r. The non-reentrant - * functions all work on a signle internal hashing table. + * functions all work on a single internal hash table. */ /* Data type for reentrant functions. */ @@ -57,34 +53,72 @@ struct hsearch_data { struct _ENTRY *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 ENTRY *__item, const char *newval, enum env_op, + int flag); }; -/* Create a new hashing table which will at most contain NEL elements. */ +/* Create a new hash table which will contain at most "__nel" elements. */ extern int hcreate_r(size_t __nel, struct hsearch_data *__htab); -/* Destroy current internal hashing table. */ +/* Destroy current internal hash table. */ extern void hdestroy_r(struct hsearch_data *__htab); /* - * Search for entry matching ITEM.key in internal hash table. If + * Search for entry matching __item.key in internal hash table. If * ACTION is `FIND' return found entry or signal error by returning * NULL. If ACTION is `ENTER' replace existing data (if any) with - * ITEM.data. + * __item.data. * */ extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval, - struct hsearch_data *__htab); + struct hsearch_data *__htab, int __flag); -/* Search and delete entry matching ITEM.key in internal hash table. */ -extern int hdelete_r(const char *__key, struct hsearch_data *__htab); +/* + * Search for an entry matching "__match". Otherwise, Same semantics + * as hsearch_r(). + */ +extern int hmatch_r(const char *__match, int __last_idx, ENTRY ** __retval, + struct hsearch_data *__htab); + +/* Search and delete entry matching "__key" in internal hash table. */ +extern int hdelete_r(const char *__key, struct hsearch_data *__htab, + int __flag); extern ssize_t hexport_r(struct hsearch_data *__htab, - const char __sep, char **__resp, size_t __size); + 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) + */ extern int himport_r(struct hsearch_data *__htab, const char *__env, size_t __size, const char __sep, - int __flag); - -/* Flags for himport_r() */ -#define H_NOCLEAR 1 /* do not clear hash table before importing */ - -#endif /* search.h */ + int __flag, int __crlf_is_lf, int nvars, + char * const vars[]); + +/* Walk the whole table calling the callback on each element */ +extern int hwalk_r(struct hsearch_data *__htab, int (*callback)(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) + +#endif /* _SEARCH_H_ */