1 /* util.c -- readline utility functions */
3 /* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library, a library for
6 reading lines of text with interactive input and history editing.
8 The GNU Readline Library is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 1, or
11 (at your option) any later version.
13 The GNU Readline Library is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 The GNU General Public License is often shipped with GNU software, and
19 is generally kept in a file called COPYING or LICENSE. If you do not
20 have a copy of the license, write to the Free Software Foundation,
21 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #define READLINE_LIBRARY
24 #if defined (HAVE_CONFIG_H)
28 #include <sys/types.h>
32 #if defined (HAVE_UNISTD_H)
33 # include <unistd.h> /* for _POSIX_VERSION */
34 #endif /* HAVE_UNISTD_H */
36 #if defined (HAVE_STDLIB_H)
39 # include "ansi_stdlib.h"
40 #endif /* HAVE_STDLIB_H */
45 /* System-specific feature definitions and include files. */
48 #if defined (TIOCSTAT_IN_SYS_IOCTL)
49 # include <sys/ioctl.h>
50 #endif /* TIOCSTAT_IN_SYS_IOCTL */
52 /* Some standard library routines. */
55 #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0)
57 /* Pseudo-globals imported from readline.c */
58 extern int readline_echoing_p;
59 extern procenv_t readline_top_level;
60 extern int rl_line_buffer_len;
61 extern Function *rl_last_func;
63 extern int _rl_defining_kbd_macro;
64 extern char *_rl_executing_macro;
66 /* Pseudo-global functions imported from other library files. */
67 extern void _rl_pop_executing_macro ();
68 extern void _rl_set_the_line ();
69 extern void _rl_init_argument ();
71 extern char *xmalloc (), *xrealloc ();
73 /* **************************************************************** */
75 /* Utility Functions */
77 /* **************************************************************** */
79 /* Return 0 if C is not a member of the class of characters that belong
80 in words, or 1 if it is. */
82 int _rl_allow_pathname_alphabetic_chars = 0;
83 static char *pathname_alphabetic_chars = "/-_=~.#$";
92 return (_rl_allow_pathname_alphabetic_chars &&
93 strchr (pathname_alphabetic_chars, c) != NULL);
96 /* How to abort things. */
102 _rl_init_argument ();
103 rl_pending_input = 0;
105 _rl_defining_kbd_macro = 0;
106 while (_rl_executing_macro)
107 _rl_pop_executing_macro ();
109 rl_last_func = (Function *)NULL;
110 longjmp (readline_top_level, 1);
115 rl_abort (count, key)
118 return (_rl_abort_internal ());
122 rl_tty_status (count, key)
125 #if defined (TIOCSTAT)
126 ioctl (1, TIOCSTAT, (char *)0);
134 /* Return a copy of the string between FROM and TO.
135 FROM is inclusive, TO is not. */
137 rl_copy_text (from, to)
143 /* Fix it if the caller is confused. */
148 copy = xmalloc (1 + length);
149 strncpy (copy, rl_line_buffer + from, length);
154 /* Increase the size of RL_LINE_BUFFER until it has enough space to hold
157 rl_extend_line_buffer (len)
160 while (len >= rl_line_buffer_len)
162 rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
163 rl_line_buffer = xrealloc (rl_line_buffer, rl_line_buffer_len);
169 /* **************************************************************** */
171 /* String Utility Functions */
173 /* **************************************************************** */
175 /* Determine if s2 occurs in s1. If so, return a pointer to the
176 match in s1. The compare is case insensitive. */
178 _rl_strindex (s1, s2)
179 register char *s1, *s2;
181 register int i, l, len;
183 for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
184 if (_rl_strnicmp (s1 + i, s2, l) == 0)
186 return ((char *)NULL);
189 #if !defined (HAVE_STRCASECMP)
190 /* Compare at most COUNT characters from string1 to string2. Case
193 _rl_strnicmp (string1, string2, count)
194 char *string1, *string2;
197 register char ch1, ch2;
203 if (_rl_to_upper(ch1) == _rl_to_upper(ch2))
211 /* strcmp (), but caseless. */
213 _rl_stricmp (string1, string2)
214 char *string1, *string2;
216 register char ch1, ch2;
218 while (*string1 && *string2)
222 if (_rl_to_upper(ch1) != _rl_to_upper(ch2))
225 return (*string1 - *string2);
227 #endif /* !HAVE_STRCASECMP */
229 /* Stupid comparison routine for qsort () ing strings. */
231 _rl_qsort_string_compare (s1, s2)
234 #if defined (HAVE_STRCOLL)
235 return (strcoll (*s1, *s2));
239 result = **s1 - **s2;
241 result = strcmp (*s1, *s2);
247 /* Function equivalents for the macros defined in chartypes.h. */
248 #undef _rl_uppercase_p
253 return (isupper (c));
256 #undef _rl_lowercase_p
261 return (islower (c));
264 #undef _rl_pure_alphabetic
266 _rl_pure_alphabetic (c)
269 return (isupper (c) || islower (c));
277 return (isdigit (c));
285 return (isupper (c) ? tolower (c) : c);
293 return (islower (c) ? toupper (c) : c);
296 #undef _rl_digit_value
301 return (isdigit (c) ? c - '0' : c);