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Diffstat (limited to 'qemu/roms/u-boot/include/search.h')
-rw-r--r-- | qemu/roms/u-boot/include/search.h | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/include/search.h b/qemu/roms/u-boot/include/search.h new file mode 100644 index 000000000..ae3efc43c --- /dev/null +++ b/qemu/roms/u-boot/include/search.h @@ -0,0 +1,123 @@ +/* + * 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. + * + * SPDX-License-Identifier: LGPL-2.1+ + */ + +/* + * 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 1 + +#include <stddef.h> + +#define __set_errno(val) do { errno = val; } while (0) + +enum env_op { + env_op_create, + env_op_delete, + env_op_overwrite, +}; + +/* Action which shall be performed in the call the hsearch. */ +typedef enum { + FIND, + ENTER +} ACTION; + +typedef struct entry { + 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. */ +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. + */ + +/* Data type for reentrant functions. */ +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. */ +extern int hcreate_r(size_t __nel, struct hsearch_data *__htab); + +/* Destroy current internal hashing table. */ +extern void hdestroy_r(struct hsearch_data *__htab); + +/* + * 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. + * */ +extern int hsearch_r(ENTRY __item, ACTION __action, ENTRY ** __retval, + struct hsearch_data *__htab, int __flag); + +/* + * 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 ITEM.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, 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) + * do_apply: whether to call callback function to check the new argument, + * and possibly apply changes (false means accept everything) + */ +extern int himport_r(struct hsearch_data *__htab, + const char *__env, size_t __size, const char __sep, + int __flag, 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) + +#endif /* search.h */ |