[thirdparty/bash.git] / subst.h

/* subst.h -- Names of externally visible functions in subst.c. */

/* Copyright (C) 1993-2009 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Bash 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
*/

#if !defined (_SUBST_H_)
#define _SUBST_H_

#include "stdc.h"

/* Constants which specify how to handle backslashes and quoting in
   expand_word_internal ().  Q_DOUBLE_QUOTES means to use the function
   slashify_in_quotes () to decide whether the backslash should be
   retained.  Q_HERE_DOCUMENT means slashify_in_here_document () to
   decide whether to retain the backslash.  Q_KEEP_BACKSLASH means
   to unconditionally retain the backslash.  Q_PATQUOTE means that we're
   expanding a pattern ${var%#[#%]pattern} in an expansion surrounded
   by double quotes. */
#define Q_DOUBLE_QUOTES  0x01
#define Q_HERE_DOCUMENT  0x02
#define Q_KEEP_BACKSLASH 0x04
#define Q_PATQUOTE	 0x08
#define Q_QUOTED	 0x10
#define Q_ADDEDQUOTES	 0x20
#define Q_QUOTEDNULL	 0x40

/* Flag values controlling how assignment statements are treated. */
#define ASS_APPEND	0x01
#define ASS_MKLOCAL	0x02
#define ASS_MKASSOC	0x04

/* Flags for the string extraction functions. */
#define SX_NOALLOC	0x01	/* just skip; don't return substring */
#define SX_VARNAME	0x02	/* variable name; for string_extract () */
#define SX_REQMATCH	0x04	/* closing/matching delimiter required */
#define SX_COMMAND	0x08	/* extracting a shell script/command */
#define SX_NOCTLESC	0x10	/* don't honor CTLESC quoting */
#define SX_NOESCCTLNUL	0x20	/* don't let CTLESC quote CTLNUL */
#define SX_NOLONGJMP	0x40	/* don't longjmp on fatal error */

/* Remove backslashes which are quoting backquotes from STRING.  Modifies
   STRING, and returns a pointer to it. */
extern char * de_backslash __P((char *));

/* Replace instances of \! in a string with !. */
extern void unquote_bang __P((char *));

/* Extract the $( construct in STRING, and return a new string.
   Start extracting at (SINDEX) as if we had just seen "$(".
   Make (SINDEX) get the position just after the matching ")".
   XFLAGS is additional flags to pass to other extraction functions, */
extern char *extract_command_subst __P((char *, int *, int));

/* Extract the $[ construct in STRING, and return a new string.
   Start extracting at (SINDEX) as if we had just seen "$[".
   Make (SINDEX) get the position just after the matching "]". */
extern char *extract_arithmetic_subst __P((char *, int *));

#if defined (PROCESS_SUBSTITUTION)
/* Extract the <( or >( construct in STRING, and return a new string.
   Start extracting at (SINDEX) as if we had just seen "<(".
   Make (SINDEX) get the position just after the matching ")". */
extern char *extract_process_subst __P((char *, char *, int *));
#endif /* PROCESS_SUBSTITUTION */

/* Extract the name of the variable to bind to from the assignment string. */
extern char *assignment_name __P((char *));

/* Return a single string of all the words present in LIST, separating
   each word with SEP. */
extern char *string_list_internal __P((WORD_LIST *, char *));

/* Return a single string of all the words present in LIST, separating
   each word with a space. */
extern char *string_list __P((WORD_LIST *));

/* Turn $* into a single string, obeying POSIX rules. */
extern char *string_list_dollar_star __P((WORD_LIST *));

/* Expand $@ into a single string, obeying POSIX rules. */
extern char *string_list_dollar_at __P((WORD_LIST *, int));

/* Turn the positional paramters into a string, understanding quoting and
   the various subtleties of using the first character of $IFS as the
   separator.  Calls string_list_dollar_at, string_list_dollar_star, and
   string_list as appropriate. */
extern char *string_list_pos_params __P((int, WORD_LIST *, int));

/* Perform quoted null character removal on each element of LIST.
   This modifies LIST. */
extern void word_list_remove_quoted_nulls __P((WORD_LIST *));

/* This performs word splitting and quoted null character removal on
   STRING. */
extern WORD_LIST *list_string __P((char *, char *, int));

extern char *ifs_firstchar  __P((int *));
extern char *get_word_from_string __P((char **, char *, char **));
extern char *strip_trailing_ifs_whitespace __P((char *, char *, int));

/* Given STRING, an assignment string, get the value of the right side
   of the `=', and bind it to the left side.  If EXPAND is true, then
   perform tilde expansion, parameter expansion, command substitution,
   and arithmetic expansion on the right-hand side.  Do not perform word
   splitting on the result of expansion. */
extern int do_assignment __P((char *));
extern int do_assignment_no_expand __P((char *));
extern int do_word_assignment __P((WORD_DESC *));

/* Append SOURCE to TARGET at INDEX.  SIZE is the current amount
   of space allocated to TARGET.  SOURCE can be NULL, in which
   case nothing happens.  Gets rid of SOURCE by free ()ing it.
   Returns TARGET in case the location has changed. */
extern char *sub_append_string __P((char *, char *, int *, int *));

/* Append the textual representation of NUMBER to TARGET.
   INDEX and SIZE are as in SUB_APPEND_STRING. */
extern char *sub_append_number __P((intmax_t, char *, int *, int *));

/* Return the word list that corresponds to `$*'. */
extern WORD_LIST *list_rest_of_args __P((void));

/* Make a single large string out of the dollar digit variables,
   and the rest_of_args.  If DOLLAR_STAR is 1, then obey the special
   case of "$*" with respect to IFS. */
extern char *string_rest_of_args __P((int));

extern int number_of_args __P((void));

/* Expand STRING by performing parameter expansion, command substitution,
   and arithmetic expansion.  Dequote the resulting WORD_LIST before
   returning it, but do not perform word splitting.  The call to
   remove_quoted_nulls () is made here because word splitting normally
   takes care of quote removal. */
extern WORD_LIST *expand_string_unsplit __P((char *, int));

/* Expand the rhs of an assignment statement. */
extern WORD_LIST *expand_string_assignment __P((char *, int));

/* Expand a prompt string. */
extern WORD_LIST *expand_prompt_string __P((char *, int, int));

/* Expand STRING just as if you were expanding a word.  This also returns
   a list of words.  Note that filename globbing is *NOT* done for word
   or string expansion, just when the shell is expanding a command.  This
   does parameter expansion, command substitution, arithmetic expansion,
   and word splitting.  Dequote the resultant WORD_LIST before returning. */
extern WORD_LIST *expand_string __P((char *, int));

/* Convenience functions that expand strings to strings, taking care of
   converting the WORD_LIST * returned by the expand_string* functions
   to a string and deallocating the WORD_LIST *. */
extern char *expand_string_to_string __P((char *, int));
extern char *expand_string_unsplit_to_string __P((char *, int));
extern char *expand_assignment_string_to_string __P((char *, int));

/* Expand an arithmetic expression string */
extern char *expand_arith_string __P((char *, int));

/* De-quote quoted characters in STRING. */
extern char *dequote_string __P((char *));

/* De-quote CTLESC-escaped CTLESC or CTLNUL characters in STRING. */
extern char *dequote_escapes __P((char *));

/* De-quote quoted characters in each word in LIST. */
extern WORD_LIST *dequote_list __P((WORD_LIST *));

/* Expand WORD, performing word splitting on the result.  This does
   parameter expansion, command substitution, arithmetic expansion,
   word splitting, and quote removal. */
extern WORD_LIST *expand_word __P((WORD_DESC *, int));

/* Expand WORD, but do not perform word splitting on the result.  This
   does parameter expansion, command substitution, arithmetic expansion,
   and quote removal. */
extern WORD_LIST *expand_word_unsplit __P((WORD_DESC *, int));
extern WORD_LIST *expand_word_leave_quoted __P((WORD_DESC *, int));

/* Return the value of a positional parameter.  This handles values > 10. */
extern char *get_dollar_var_value __P((intmax_t));

/* Quote a string to protect it from word splitting. */
extern char *quote_string __P((char *));

/* Quote escape characters (characters special to interals of expansion)
   in a string. */
extern char *quote_escapes __P((char *));

/* And remove such quoted special characters. */
extern char *remove_quoted_escapes __P((char *));

/* Remove CTLNUL characters from STRING unless they are quoted with CTLESC. */
extern char *remove_quoted_nulls __P((char *));

/* Perform quote removal on STRING.  If QUOTED > 0, assume we are obeying the
   backslash quoting rules for within double quotes. */
extern char *string_quote_removal __P((char *, int));

/* Perform quote removal on word WORD.  This allocates and returns a new
   WORD_DESC *. */
extern WORD_DESC *word_quote_removal __P((WORD_DESC *, int));

/* Perform quote removal on all words in LIST.  If QUOTED is non-zero,
   the members of the list are treated as if they are surrounded by
   double quotes.  Return a new list, or NULL if LIST is NULL. */
extern WORD_LIST *word_list_quote_removal __P((WORD_LIST *, int));

/* Called when IFS is changed to maintain some private variables. */
extern void setifs __P((SHELL_VAR *));

/* Return the value of $IFS, or " \t\n" if IFS is unset. */
extern char *getifs __P((void));

/* This splits a single word into a WORD LIST on $IFS, but only if the word
   is not quoted.  list_string () performs quote removal for us, even if we
   don't do any splitting. */
extern WORD_LIST *word_split __P((WORD_DESC *, char *));

/* Take the list of words in LIST and do the various substitutions.  Return
   a new list of words which is the expanded list, and without things like
   variable assignments. */
extern WORD_LIST *expand_words __P((WORD_LIST *));

/* Same as expand_words (), but doesn't hack variable or environment
   variables. */
extern WORD_LIST *expand_words_no_vars __P((WORD_LIST *));

/* Perform the `normal shell expansions' on a WORD_LIST.  These are
   brace expansion, tilde expansion, parameter and variable substitution,
   command substitution, arithmetic expansion, and word splitting. */
extern WORD_LIST *expand_words_shellexp __P((WORD_LIST *));

extern WORD_DESC *command_substitute __P((char *, int));
extern char *pat_subst __P((char *, char *, char *, int));

extern int fifos_pending __P((void));
extern void unlink_fifo_list __P((void));

extern WORD_LIST *list_string_with_quotes __P((char *));

#if defined (ARRAY_VARS)
extern char *extract_array_assignment_list __P((char *, int *));
#endif

#if defined (COND_COMMAND)
extern char *remove_backslashes __P((char *));
extern char *cond_expand_word __P((WORD_DESC *, int));
#endif

/* Flags for skip_to_delim */
#define SD_NOJMP	0x01	/* don't longjmp on fatal error. */
#define SD_INVERT	0x02	/* look for chars NOT in passed set */

extern int skip_to_delim __P((char *, int, char *, int));

#if defined (READLINE)
extern int char_is_quoted __P((char *, int));
extern int unclosed_pair __P((char *, int, char *));
extern WORD_LIST *split_at_delims __P((char *, int, char *, int, int *, int *));
#endif

/* Variables used to keep track of the characters in IFS. */
extern SHELL_VAR *ifs_var;
extern char *ifs_value;
extern unsigned char ifs_cmap[];

#if defined (HANDLE_MULTIBYTE)
extern unsigned char ifs_firstc[];
extern size_t ifs_firstc_len;
#else
extern unsigned char ifs_firstc;
#endif

/* Evaluates to 1 if C is a character in $IFS. */
#define isifs(c)	(ifs_cmap[(unsigned char)(c)] != 0)

/* How to determine the quoted state of the character C. */
#define QUOTED_CHAR(c)  ((c) == CTLESC)

/* Is the first character of STRING a quoted NULL character? */
#define QUOTED_NULL(string) ((string)[0] == CTLNUL && (string)[1] == '\0')

#endif /* !_SUBST_H_ */
Commit	Line	Data
726f6388 JA	1	/* subst.h -- Names of externally visible functions in subst.c. */
726f6388 JA	2
3185942a	3	/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
726f6388 JA	4
	5	This file is part of GNU Bash, the Bourne Again SHell.
	6
3185942a JA	7	Bash is free software: you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation, either version 3 of the License, or
	10	(at your option) any later version.
726f6388	11
3185942a JA	12	Bash is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
726f6388	16
3185942a JA	17	You should have received a copy of the GNU General Public License
	18	along with Bash. If not, see <http://www.gnu.org/licenses/>.
	19	*/
726f6388 JA	20
	21	#if !defined (_SUBST_H_)
	22	#define _SUBST_H_
	23
	24	#include "stdc.h"
	25
28ef6c31 JA	26	/* Constants which specify how to handle backslashes and quoting in
	27	expand_word_internal (). Q_DOUBLE_QUOTES means to use the function
	28	slashify_in_quotes () to decide whether the backslash should be
	29	retained. Q_HERE_DOCUMENT means slashify_in_here_document () to
	30	decide whether to retain the backslash. Q_KEEP_BACKSLASH means
7117c2d2 JA	31	to unconditionally retain the backslash. Q_PATQUOTE means that we're
	32	expanding a pattern ${var%#[#%]pattern} in an expansion surrounded
	33	by double quotes. */
95732b49 JA	34	#define Q_DOUBLE_QUOTES 0x01
	35	#define Q_HERE_DOCUMENT 0x02
	36	#define Q_KEEP_BACKSLASH 0x04
	37	#define Q_PATQUOTE 0x08
28ef6c31 JA	38	#define Q_QUOTED 0x10
	39	#define Q_ADDEDQUOTES 0x20
	40	#define Q_QUOTEDNULL 0x40
	41
95732b49 JA	42	/* Flag values controlling how assignment statements are treated. */
	43	#define ASS_APPEND 0x01
	44	#define ASS_MKLOCAL 0x02
3185942a JA	45	#define ASS_MKASSOC 0x04
	46
	47	/* Flags for the string extraction functions. */
	48	#define SX_NOALLOC 0x01 /* just skip; don't return substring */
	49	#define SX_VARNAME 0x02 /* variable name; for string_extract () */
	50	#define SX_REQMATCH 0x04 /* closing/matching delimiter required */
	51	#define SX_COMMAND 0x08 /* extracting a shell script/command */
	52	#define SX_NOCTLESC 0x10 /* don't honor CTLESC quoting */
	53	#define SX_NOESCCTLNUL 0x20 /* don't let CTLESC quote CTLNUL */
	54	#define SX_NOLONGJMP 0x40 /* don't longjmp on fatal error */
95732b49	55
726f6388 JA	56	/* Remove backslashes which are quoting backquotes from STRING. Modifies
	57	STRING, and returns a pointer to it. */
	58	extern char * de_backslash __P((char *));
	59
	60	/* Replace instances of \! in a string with !. */
	61	extern void unquote_bang __P((char *));
	62
	63	/* Extract the $( construct in STRING, and return a new string.
	64	Start extracting at (SINDEX) as if we had just seen "$(".
3185942a JA	65	Make (SINDEX) get the position just after the matching ")".
	66	XFLAGS is additional flags to pass to other extraction functions, */
	67	extern char extract_command_subst __P((char , int *, int));
726f6388 JA	68
	69	/* Extract the $[ construct in STRING, and return a new string.
	70	Start extracting at (SINDEX) as if we had just seen "$[".
	71	Make (SINDEX) get the position just after the matching "]". */
	72	extern char extract_arithmetic_subst __P((char , int *));
	73
	74	#if defined (PROCESS_SUBSTITUTION)
	75	/* Extract the <( or >( construct in STRING, and return a new string.
	76	Start extracting at (SINDEX) as if we had just seen "<(".
	77	Make (SINDEX) get the position just after the matching ")". */
	78	extern char extract_process_subst __P((char , char , int ));
	79	#endif /* PROCESS_SUBSTITUTION */
	80
	81	/* Extract the name of the variable to bind to from the assignment string. */
	82	extern char assignment_name __P((char ));
	83
7117c2d2 JA	84	/* Return a single string of all the words present in LIST, separating
	85	each word with SEP. */
	86	extern char string_list_internal __P((WORD_LIST , char *));
	87
726f6388 JA	88	/* Return a single string of all the words present in LIST, separating
	89	each word with a space. */
	90	extern char string_list __P((WORD_LIST ));
	91
f73dda09 JA	92	/* Turn $* into a single string, obeying POSIX rules. */
	93	extern char string_list_dollar_star __P((WORD_LIST ));
	94
	95	/* Expand $@ into a single string, obeying POSIX rules. */
	96	extern char string_list_dollar_at __P((WORD_LIST , int));
	97
3185942a JA	98	/* Turn the positional paramters into a string, understanding quoting and
	99	the various subtleties of using the first character of $IFS as the
	100	separator. Calls string_list_dollar_at, string_list_dollar_star, and
	101	string_list as appropriate. */
	102	extern char string_list_pos_params __P((int, WORD_LIST , int));
	103
726f6388 JA	104	/* Perform quoted null character removal on each element of LIST.
	105	This modifies LIST. */
	106	extern void word_list_remove_quoted_nulls __P((WORD_LIST *));
	107
	108	/* This performs word splitting and quoted null character removal on
	109	STRING. */
	110	extern WORD_LIST list_string __P((char , char *, int));
	111
3185942a	112	extern char ifs_firstchar __P((int ));
726f6388 JA	113	extern char get_word_from_string __P((char , char , char **));
	114	extern char strip_trailing_ifs_whitespace __P((char , char *, int));
	115
	116	/* Given STRING, an assignment string, get the value of the right side
	117	of the `=', and bind it to the left side. If EXPAND is true, then
95732b49 JA	118	perform tilde expansion, parameter expansion, command substitution,
	119	and arithmetic expansion on the right-hand side. Do not perform word
	120	splitting on the result of expansion. */
	121	extern int do_assignment __P((char *));
	122	extern int do_assignment_no_expand __P((char *));
	123	extern int do_word_assignment __P((WORD_DESC *));
ccc6cda3	124
726f6388 JA	125	/* Append SOURCE to TARGET at INDEX. SIZE is the current amount
	126	of space allocated to TARGET. SOURCE can be NULL, in which
	127	case nothing happens. Gets rid of SOURCE by free ()ing it.
	128	Returns TARGET in case the location has changed. */
	129	extern char sub_append_string __P((char , char , int , int *));
	130
	131	/* Append the textual representation of NUMBER to TARGET.
	132	INDEX and SIZE are as in SUB_APPEND_STRING. */
7117c2d2	133	extern char sub_append_number __P((intmax_t, char , int , int ));
726f6388 JA	134
	135	/* Return the word list that corresponds to `$'. /
	136	extern WORD_LIST *list_rest_of_args __P((void));
	137
	138	/* Make a single large string out of the dollar digit variables,
	139	and the rest_of_args. If DOLLAR_STAR is 1, then obey the special
	140	case of "$" with respect to IFS. /
	141	extern char *string_rest_of_args __P((int));
	142
ccc6cda3 JA	143	extern int number_of_args __P((void));
ccc6cda3 JA	144
726f6388 JA	145	/* Expand STRING by performing parameter expansion, command substitution,
	146	and arithmetic expansion. Dequote the resulting WORD_LIST before
	147	returning it, but do not perform word splitting. The call to
f73dda09	148	remove_quoted_nulls () is made here because word splitting normally
726f6388 JA	149	takes care of quote removal. */
	150	extern WORD_LIST expand_string_unsplit __P((char , int));
	151
95732b49 JA	152	/* Expand the rhs of an assignment statement. */
	153	extern WORD_LIST expand_string_assignment __P((char , int));
	154
bb70624e	155	/* Expand a prompt string. */
f1be666c	156	extern WORD_LIST expand_prompt_string __P((char , int, int));
bb70624e	157
726f6388 JA	158	/* Expand STRING just as if you were expanding a word. This also returns
	159	a list of words. Note that filename globbing is NOT done for word
	160	or string expansion, just when the shell is expanding a command. This
	161	does parameter expansion, command substitution, arithmetic expansion,
	162	and word splitting. Dequote the resultant WORD_LIST before returning. */
	163	extern WORD_LIST expand_string __P((char , int));
	164
f73dda09 JA	165	/* Convenience functions that expand strings to strings, taking care of
	166	converting the WORD_LIST * returned by the expand_string* functions
	167	to a string and deallocating the WORD_LIST . /
	168	extern char expand_string_to_string __P((char , int));
	169	extern char expand_string_unsplit_to_string __P((char , int));
95732b49	170	extern char expand_assignment_string_to_string __P((char , int));
f73dda09	171
0628567a JA	172	/* Expand an arithmetic expression string */
	173	extern char expand_arith_string __P((char , int));
	174
	175	/* De-quote quoted characters in STRING. */
726f6388 JA	176	extern char dequote_string __P((char ));
726f6388 JA	177
3185942a JA	178	/* De-quote CTLESC-escaped CTLESC or CTLNUL characters in STRING. */
	179	extern char dequote_escapes __P((char ));
	180
0628567a JA	181	/* De-quote quoted characters in each word in LIST. */
	182	extern WORD_LIST dequote_list __P((WORD_LIST ));
	183
726f6388 JA	184	/* Expand WORD, performing word splitting on the result. This does
	185	parameter expansion, command substitution, arithmetic expansion,
	186	word splitting, and quote removal. */
	187	extern WORD_LIST expand_word __P((WORD_DESC , int));
	188
	189	/* Expand WORD, but do not perform word splitting on the result. This
	190	does parameter expansion, command substitution, arithmetic expansion,
	191	and quote removal. */
28ef6c31	192	extern WORD_LIST expand_word_unsplit __P((WORD_DESC , int));
726f6388 JA	193	extern WORD_LIST expand_word_leave_quoted __P((WORD_DESC , int));
	194
	195	/* Return the value of a positional parameter. This handles values > 10. */
7117c2d2	196	extern char *get_dollar_var_value __P((intmax_t));
726f6388	197
ccc6cda3 JA	198	/* Quote a string to protect it from word splitting. */
	199	extern char quote_string __P((char ));
	200
f73dda09 JA	201	/* Quote escape characters (characters special to interals of expansion)
	202	in a string. */
	203	extern char quote_escapes __P((char ));
	204
3185942a JA	205	/* And remove such quoted special characters. */
	206	extern char remove_quoted_escapes __P((char ));
	207
	208	/* Remove CTLNUL characters from STRING unless they are quoted with CTLESC. */
	209	extern char remove_quoted_nulls __P((char ));
	210
726f6388 JA	211	/* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the
	212	backslash quoting rules for within double quotes. */
	213	extern char string_quote_removal __P((char , int));
	214
	215	/* Perform quote removal on word WORD. This allocates and returns a new
	216	WORD_DESC . /
	217	extern WORD_DESC word_quote_removal __P((WORD_DESC , int));
	218
	219	/* Perform quote removal on all words in LIST. If QUOTED is non-zero,
	220	the members of the list are treated as if they are surrounded by
	221	double quotes. Return a new list, or NULL if LIST is NULL. */
	222	extern WORD_LIST word_list_quote_removal __P((WORD_LIST , int));
	223
7117c2d2 JA	224	/* Called when IFS is changed to maintain some private variables. */
	225	extern void setifs __P((SHELL_VAR *));
	226
	227	/* Return the value of $IFS, or " \t\n" if IFS is unset. */
	228	extern char *getifs __P((void));
	229
726f6388 JA	230	/* This splits a single word into a WORD LIST on $IFS, but only if the word
	231	is not quoted. list_string () performs quote removal for us, even if we
	232	don't do any splitting. */
7117c2d2	233	extern WORD_LIST word_split __P((WORD_DESC , char *));
726f6388 JA	234
	235	/* Take the list of words in LIST and do the various substitutions. Return
	236	a new list of words which is the expanded list, and without things like
	237	variable assignments. */
	238	extern WORD_LIST expand_words __P((WORD_LIST ));
	239
	240	/* Same as expand_words (), but doesn't hack variable or environment
	241	variables. */
	242	extern WORD_LIST expand_words_no_vars __P((WORD_LIST ));
	243
cce855bc JA	244	/* Perform the `normal shell expansions' on a WORD_LIST. These are
	245	brace expansion, tilde expansion, parameter and variable substitution,
	246	command substitution, arithmetic expansion, and word splitting. */
	247	extern WORD_LIST expand_words_shellexp __P((WORD_LIST ));
726f6388	248
3185942a	249	extern WORD_DESC command_substitute __P((char , int));
ccc6cda3 JA	250	extern char pat_subst __P((char , char , char , int));
ccc6cda3 JA	251
f1be666c	252	extern int fifos_pending __P((void));
ccc6cda3 JA	253	extern void unlink_fifo_list __P((void));
ccc6cda3 JA	254
bb70624e JA	255	extern WORD_LIST list_string_with_quotes __P((char ));
bb70624e JA	256
ccc6cda3	257	#if defined (ARRAY_VARS)
ccc6cda3 JA	258	extern char extract_array_assignment_list __P((char , int *));
	259	#endif
	260
cce855bc JA	261	#if defined (COND_COMMAND)
	262	extern char remove_backslashes __P((char ));
	263	extern char cond_expand_word __P((WORD_DESC , int));
ccc6cda3 JA	264	#endif
ccc6cda3 JA	265
3185942a JA	266	/* Flags for skip_to_delim */
	267	#define SD_NOJMP 0x01 /* don't longjmp on fatal error. */
	268	#define SD_INVERT 0x02 /* look for chars NOT in passed set */
	269
	270	extern int skip_to_delim __P((char , int, char , int));
	271
bb70624e JA	272	#if defined (READLINE)
	273	extern int char_is_quoted __P((char *, int));
	274	extern int unclosed_pair __P((char , int, char ));
bb70624e JA	275	extern WORD_LIST split_at_delims __P((char , int, char , int, int , int *));
	276	#endif
	277
7117c2d2 JA	278	/* Variables used to keep track of the characters in IFS. */
	279	extern SHELL_VAR *ifs_var;
	280	extern char *ifs_value;
	281	extern unsigned char ifs_cmap[];
95732b49 JA	282
	283	#if defined (HANDLE_MULTIBYTE)
	284	extern unsigned char ifs_firstc[];
	285	extern size_t ifs_firstc_len;
	286	#else
7117c2d2	287	extern unsigned char ifs_firstc;
95732b49	288	#endif
7117c2d2 JA	289
	290	/* Evaluates to 1 if C is a character in $IFS. */
	291	#define isifs(c) (ifs_cmap[(unsigned char)(c)] != 0)
	292
ccc6cda3 JA	293	/* How to determine the quoted state of the character C. */
	294	#define QUOTED_CHAR(c) ((c) == CTLESC)
	295
	296	/* Is the first character of STRING a quoted NULL character? */
	297	#define QUOTED_NULL(string) ((string)[0] == CTLNUL && (string)[1] == '\0')
	298
726f6388	299	#endif /* !_SUBST_H_ */