/* Copyright (C) 1991-2021 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, see
   <https://www.gnu.org/licenses/>.  */

#ifndef	_WORDEXP_H
#define	_WORDEXP_H	1

#include <features.h>
#define __need_size_t
#include <stddef.h>

__BEGIN_DECLS

/* Bits set in the FLAGS argument to `wordexp'.  */
enum
  {
    WRDE_DOOFFS = (1 << 0),	/* Insert PWORDEXP->we_offs NULLs.  */
    WRDE_APPEND = (1 << 1),	/* Append to results of a previous call.  */
    WRDE_NOCMD = (1 << 2),	/* Don't do command substitution.  */
    WRDE_REUSE = (1 << 3),	/* Reuse storage in PWORDEXP.  */
    WRDE_SHOWERR = (1 << 4),	/* Don't redirect stderr to /dev/null.  */
    WRDE_UNDEF = (1 << 5),	/* Error for expanding undefined variables.  */
    __WRDE_FLAGS = (WRDE_DOOFFS | WRDE_APPEND | WRDE_NOCMD
		    | WRDE_REUSE | WRDE_SHOWERR | WRDE_UNDEF)
  };

/* Structure describing a word-expansion run.  */
typedef struct
  {
    size_t we_wordc;		/* Count of words matched.  */
    char **we_wordv;		/* List of expanded words.  */
    size_t we_offs;		/* Slots to reserve in `we_wordv'.  */
  } wordexp_t;

/* Possible nonzero return values from `wordexp'.  */
enum
  {
#ifdef __USE_XOPEN
    WRDE_NOSYS = -1,		/* Never used since we support `wordexp'.  */
#endif
    WRDE_NOSPACE = 1,		/* Ran out of memory.  */
    WRDE_BADCHAR,		/* A metachar appears in the wrong place.  */
    WRDE_BADVAL,		/* Undefined var reference with WRDE_UNDEF.  */
    WRDE_CMDSUB,		/* Command substitution with WRDE_NOCMD.  */
    WRDE_SYNTAX			/* Shell syntax error.  */
  };

/* Do word expansion of WORDS into PWORDEXP.  */
extern int wordexp (const char *__restrict __words,
		    wordexp_t *__restrict __pwordexp, int __flags);

/* Free the storage allocated by a `wordexp' call.  */
extern void wordfree (wordexp_t *__wordexp) __THROW;

__END_DECLS

#endif /* wordexp.h  */