source: vendor/m4/1.4.8/lib/quotearg.h@ 3090

Last change on this file since 3090 was 3090, checked in by bird, 19 years ago

m4 1.4.8
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1/* quotearg.h - quote arguments for output
2
3 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004, 2006 Free
4 Software Foundation, Inc.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19
20/* Written by Paul Eggert <[email protected]> */
21
22#ifndef QUOTEARG_H_
23# define QUOTEARG_H_ 1
24
25# include <stddef.h>
26
27/* Basic quoting styles. */
28enum quoting_style
29 {
30 /* Output names as-is (ls --quoting-style=literal). */
31 literal_quoting_style,
32
33 /* Quote names for the shell if they contain shell metacharacters
34 or would cause ambiguous output (ls --quoting-style=shell). */
35 shell_quoting_style,
36
37 /* Quote names for the shell, even if they would normally not
38 require quoting (ls --quoting-style=shell-always). */
39 shell_always_quoting_style,
40
41 /* Quote names as for a C language string (ls --quoting-style=c). */
42 c_quoting_style,
43
44 /* Like c_quoting_style except omit the surrounding double-quote
45 characters (ls --quoting-style=escape). */
46 escape_quoting_style,
47
48 /* Like clocale_quoting_style, but quote `like this' instead of
49 "like this" in the default C locale (ls --quoting-style=locale). */
50 locale_quoting_style,
51
52 /* Like c_quoting_style except use quotation marks appropriate for
53 the locale (ls --quoting-style=clocale). */
54 clocale_quoting_style
55 };
56
57/* For now, --quoting-style=literal is the default, but this may change. */
58# ifndef DEFAULT_QUOTING_STYLE
59# define DEFAULT_QUOTING_STYLE literal_quoting_style
60# endif
61
62/* Names of quoting styles and their corresponding values. */
63extern char const *const quoting_style_args[];
64extern enum quoting_style const quoting_style_vals[];
65
66struct quoting_options;
67
68/* The functions listed below set and use a hidden variable
69 that contains the default quoting style options. */
70
71/* Allocate a new set of quoting options, with contents initially identical
72 to O if O is not null, or to the default if O is null.
73 It is the caller's responsibility to free the result. */
74struct quoting_options *clone_quoting_options (struct quoting_options *o);
75
76/* Get the value of O's quoting style. If O is null, use the default. */
77enum quoting_style get_quoting_style (struct quoting_options *o);
78
79/* In O (or in the default if O is null),
80 set the value of the quoting style to S. */
81void set_quoting_style (struct quoting_options *o, enum quoting_style s);
82
83/* In O (or in the default if O is null),
84 set the value of the quoting options for character C to I.
85 Return the old value. Currently, the only values defined for I are
86 0 (the default) and 1 (which means to quote the character even if
87 it would not otherwise be quoted). */
88int set_char_quoting (struct quoting_options *o, char c, int i);
89
90/* Place into buffer BUFFER (of size BUFFERSIZE) a quoted version of
91 argument ARG (of size ARGSIZE), using O to control quoting.
92 If O is null, use the default.
93 Terminate the output with a null character, and return the written
94 size of the output, not counting the terminating null.
95 If BUFFERSIZE is too small to store the output string, return the
96 value that would have been returned had BUFFERSIZE been large enough.
97 If ARGSIZE is -1, use the string length of the argument for ARGSIZE. */
98size_t quotearg_buffer (char *buffer, size_t buffersize,
99 char const *arg, size_t argsize,
100 struct quoting_options const *o);
101
102/* Like quotearg_buffer, except return the result in a newly allocated
103 buffer. It is the caller's responsibility to free the result. */
104char *quotearg_alloc (char const *arg, size_t argsize,
105 struct quoting_options const *o);
106
107/* Use storage slot N to return a quoted version of the string ARG.
108 Use the default quoting options.
109 The returned value points to static storage that can be
110 reused by the next call to this function with the same value of N.
111 N must be nonnegative. */
112char *quotearg_n (int n, char const *arg);
113
114/* Equivalent to quotearg_n (0, ARG). */
115char *quotearg (char const *arg);
116
117/* Use style S and storage slot N to return a quoted version of the string ARG.
118 This is like quotearg_n (N, ARG), except that it uses S with no other
119 options to specify the quoting method. */
120char *quotearg_n_style (int n, enum quoting_style s, char const *arg);
121
122/* Use style S and storage slot N to return a quoted version of the
123 argument ARG of size ARGSIZE. This is like quotearg_n_style
124 (N, S, ARG), except it can quote null bytes. */
125char *quotearg_n_style_mem (int n, enum quoting_style s,
126 char const *arg, size_t argsize);
127
128/* Equivalent to quotearg_n_style (0, S, ARG). */
129char *quotearg_style (enum quoting_style s, char const *arg);
130
131/* Like quotearg (ARG), except also quote any instances of CH. */
132char *quotearg_char (char const *arg, char ch);
133
134/* Equivalent to quotearg_char (ARG, ':'). */
135char *quotearg_colon (char const *arg);
136
137/* Free any dynamically allocated memory. */
138void quotearg_free (void);
139
140#endif /* !QUOTEARG_H_ */
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