1 /* util.c -- readline utility functions */
3 /* Copyright (C) 1987-2010 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library (Readline), a library
6 for reading lines of text with interactive input and history editing.
8 Readline is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 Readline is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Readline. If not, see <http://www.gnu.org/licenses/>.
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. */
49 #if defined (TIOCSTAT_IN_SYS_IOCTL)
50 # include <sys/ioctl.h>
51 #endif /* TIOCSTAT_IN_SYS_IOCTL */
53 /* Some standard library routines. */
56 #include "rlprivate.h"
59 /* **************************************************************** */
61 /* Utility Functions */
63 /* **************************************************************** */
65 /* Return 0 if C is not a member of the class of characters that belong
66 in words, or 1 if it is. */
68 int _rl_allow_pathname_alphabetic_chars = 0;
69 static const char * const pathname_alphabetic_chars = "/-_=~.#$";
78 return (_rl_allow_pathname_alphabetic_chars &&
79 strchr (pathname_alphabetic_chars, c) != NULL);
82 #if defined (HANDLE_MULTIBYTE)
84 _rl_walphabetic (wchar_t wc)
92 return (_rl_allow_pathname_alphabetic_chars &&
93 strchr (pathname_alphabetic_chars, c) != NULL);
97 /* How to abort things. */
103 _rl_reset_argument ();
104 rl_clear_pending_input ();
106 RL_UNSETSTATE (RL_STATE_MACRODEF);
107 while (rl_executing_macro)
108 _rl_pop_executing_macro ();
110 rl_last_func = (rl_command_func_t *)NULL;
111 longjmp (_rl_top_level, 1);
116 rl_abort (count, key)
119 return (_rl_abort_internal ());
123 _rl_null_function (count, key)
130 rl_tty_status (count, key)
133 #if defined (TIOCSTAT)
134 ioctl (1, TIOCSTAT, (char *)0);
135 rl_refresh_line (count, key);
142 /* Return a copy of the string between FROM and TO.
143 FROM is inclusive, TO is not. */
145 rl_copy_text (from, to)
151 /* Fix it if the caller is confused. */
156 copy = (char *)xmalloc (1 + length);
157 strncpy (copy, rl_line_buffer + from, length);
162 /* Increase the size of RL_LINE_BUFFER until it has enough space to hold
165 rl_extend_line_buffer (len)
168 while (len >= rl_line_buffer_len)
170 rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
171 rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len);
178 /* A function for simple tilde expansion. */
180 rl_tilde_expand (ignore, key)
183 register int start, end;
184 char *homedir, *temp;
190 if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
192 homedir = tilde_expand ("~");
193 _rl_replace_text (homedir, start, end);
197 else if (rl_line_buffer[start] != '~')
199 for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--)
207 while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end);
209 if (whitespace (rl_line_buffer[end]) || end >= rl_end)
212 /* If the first character of the current word is a tilde, perform
213 tilde expansion and insert the result. If not a tilde, do
215 if (rl_line_buffer[start] == '~')
217 len = end - start + 1;
218 temp = (char *)xmalloc (len + 1);
219 strncpy (temp, rl_line_buffer + start, len);
221 homedir = tilde_expand (temp);
224 _rl_replace_text (homedir, start, end);
231 #if defined (USE_VARARGS)
233 #if defined (PREFER_STDARG)
234 _rl_ttymsg (const char *format, ...)
236 _rl_ttymsg (va_alist)
241 #if defined (PREFER_VARARGS)
245 #if defined (PREFER_STDARG)
246 va_start (args, format);
249 format = va_arg (args, char *);
252 fprintf (stderr, "readline: ");
253 vfprintf (stderr, format, args);
254 fprintf (stderr, "\n");
259 rl_forced_update_display ();
263 #if defined (PREFER_STDARG)
264 _rl_errmsg (const char *format, ...)
266 _rl_errmsg (va_alist)
271 #if defined (PREFER_VARARGS)
275 #if defined (PREFER_STDARG)
276 va_start (args, format);
279 format = va_arg (args, char *);
282 fprintf (stderr, "readline: ");
283 vfprintf (stderr, format, args);
284 fprintf (stderr, "\n");
290 #else /* !USE_VARARGS */
292 _rl_ttymsg (format, arg1, arg2)
295 fprintf (stderr, "readline: ");
296 fprintf (stderr, format, arg1, arg2);
297 fprintf (stderr, "\n");
299 rl_forced_update_display ();
303 _rl_errmsg (format, arg1, arg2)
306 fprintf (stderr, "readline: ");
307 fprintf (stderr, format, arg1, arg2);
308 fprintf (stderr, "\n");
310 #endif /* !USE_VARARGS */
312 /* **************************************************************** */
314 /* String Utility Functions */
316 /* **************************************************************** */
318 /* Determine if s2 occurs in s1. If so, return a pointer to the
319 match in s1. The compare is case insensitive. */
321 _rl_strindex (s1, s2)
322 register const char *s1, *s2;
324 register int i, l, len;
326 for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
327 if (_rl_strnicmp (s1 + i, s2, l) == 0)
328 return ((char *) (s1 + i));
329 return ((char *)NULL);
333 /* Find the first occurrence in STRING1 of any character from STRING2.
334 Return a pointer to the character in STRING1. */
336 _rl_strpbrk (string1, string2)
337 const char *string1, *string2;
339 register const char *scan;
340 #if defined (HANDLE_MULTIBYTE)
344 memset (&ps, 0, sizeof (mbstate_t));
347 for (; *string1; string1++)
349 for (scan = string2; *scan; scan++)
351 if (*string1 == *scan)
352 return ((char *)string1);
354 #if defined (HANDLE_MULTIBYTE)
355 if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
357 v = _rl_get_char_len (string1, &ps);
359 string1 += v - 1; /* -1 to account for auto-increment in loop */
363 return ((char *)NULL);
367 #if !defined (HAVE_STRCASECMP)
368 /* Compare at most COUNT characters from string1 to string2. Case
369 doesn't matter (strncasecmp). */
371 _rl_strnicmp (string1, string2, count)
372 char *string1, *string2;
375 register char *s1, *s2;
378 if (count <= 0 || (string1 == string2))
385 d = _rl_to_lower (*s1) - _rl_to_lower (*s2); /* XXX - cast to unsigned char? */
397 /* strcmp (), but caseless (strcasecmp). */
399 _rl_stricmp (string1, string2)
400 char *string1, *string2;
402 register char *s1, *s2;
411 while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0)
420 #endif /* !HAVE_STRCASECMP */
422 /* Stupid comparison routine for qsort () ing strings. */
424 _rl_qsort_string_compare (s1, s2)
427 #if defined (HAVE_STRCOLL)
428 return (strcoll (*s1, *s2));
432 result = **s1 - **s2;
434 result = strcmp (*s1, *s2);
440 /* Function equivalents for the macros defined in chardefs.h. */
441 #define FUNCTION_FOR_MACRO(f) int (f) (c) int c; { return f (c); }
443 FUNCTION_FOR_MACRO (_rl_digit_p)
444 FUNCTION_FOR_MACRO (_rl_digit_value)
445 FUNCTION_FOR_MACRO (_rl_lowercase_p)
446 FUNCTION_FOR_MACRO (_rl_pure_alphabetic)
447 FUNCTION_FOR_MACRO (_rl_to_lower)
448 FUNCTION_FOR_MACRO (_rl_to_upper)
449 FUNCTION_FOR_MACRO (_rl_uppercase_p)
451 /* A convenience function, to force memory deallocation to be performed
452 by readline. DLLs on Windows apparently require this. */
461 /* Backwards compatibility, now that savestring has been removed from
462 all `public' readline header files. */
463 #undef _rl_savestring
468 return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s)));
471 #if defined (USE_VARARGS)
472 static FILE *_rl_tracefp;
475 #if defined (PREFER_STDARG)
476 _rl_trace (const char *format, ...)
483 #if defined (PREFER_VARARGS)
487 #if defined (PREFER_STDARG)
488 va_start (args, format);
491 format = va_arg (args, char *);
494 if (_rl_tracefp == 0)
496 vfprintf (_rl_tracefp, format, args);
497 fprintf (_rl_tracefp, "\n");
498 fflush (_rl_tracefp);
509 fclose (_rl_tracefp);
510 sprintf (fnbuf, "/var/tmp/rltrace.%ld", getpid());
512 _rl_tracefp = fopen (fnbuf, "w+");
513 return _rl_tracefp != 0;
521 r = fclose (_rl_tracefp);