mirror of
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ecd1446fe1
When this option is enabled, CRLF is treated like LF when importing environments
from text files, which means CRs ('\r') in front of LFs ('\n') are just ignored.
Drawback of enabling this option is that (maybe exported) variables which have
a trailing CR in their content will get imported without that CR. But this
drawback is very unlikely and the big advantage of letting Windows user create
a *working* uEnv.txt too is likely more welcome.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
/*
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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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* SPDX-License-Identifier: LGPL-2.1+
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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 1
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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 the 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 signle internal hashing 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 hashing table which will at most contain NEL elements. */
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extern int hcreate_r(size_t __nel, struct hsearch_data *__htab);
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/* Destroy current internal hashing 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 ITEM.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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* do_apply: whether to call callback function to check the new argument,
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* and possibly apply changes (false means accept everything)
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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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#endif /* search.h */
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