527 lines
10 KiB
C
527 lines
10 KiB
C
/* util.c -- readline utility functions */
|
|
|
|
/* Copyright (C) 1987-2010 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU Readline Library (Readline), a library
|
|
for reading lines of text with interactive input and history editing.
|
|
|
|
Readline 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.
|
|
|
|
Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#define READLINE_LIBRARY
|
|
|
|
#if defined (HAVE_CONFIG_H)
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include "posixjmp.h"
|
|
|
|
#if defined (HAVE_UNISTD_H)
|
|
# include <unistd.h> /* for _POSIX_VERSION */
|
|
#endif /* HAVE_UNISTD_H */
|
|
|
|
#if defined (HAVE_STDLIB_H)
|
|
# include <stdlib.h>
|
|
#else
|
|
# include "ansi_stdlib.h"
|
|
#endif /* HAVE_STDLIB_H */
|
|
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
|
|
/* System-specific feature definitions and include files. */
|
|
#include "rldefs.h"
|
|
#include "rlmbutil.h"
|
|
|
|
#if defined (TIOCSTAT_IN_SYS_IOCTL)
|
|
# include <sys/ioctl.h>
|
|
#endif /* TIOCSTAT_IN_SYS_IOCTL */
|
|
|
|
/* Some standard library routines. */
|
|
#include "readline.h"
|
|
|
|
#include "rlprivate.h"
|
|
#include "xmalloc.h"
|
|
|
|
/* **************************************************************** */
|
|
/* */
|
|
/* Utility Functions */
|
|
/* */
|
|
/* **************************************************************** */
|
|
|
|
/* Return 0 if C is not a member of the class of characters that belong
|
|
in words, or 1 if it is. */
|
|
|
|
int _rl_allow_pathname_alphabetic_chars = 0;
|
|
static const char * const pathname_alphabetic_chars = "/-_=~.#$";
|
|
|
|
int
|
|
rl_alphabetic (c)
|
|
int c;
|
|
{
|
|
if (ALPHABETIC (c))
|
|
return (1);
|
|
|
|
return (_rl_allow_pathname_alphabetic_chars &&
|
|
strchr (pathname_alphabetic_chars, c) != NULL);
|
|
}
|
|
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
int
|
|
_rl_walphabetic (wchar_t wc)
|
|
{
|
|
int c;
|
|
|
|
if (iswalnum (wc))
|
|
return (1);
|
|
|
|
c = wc & 0177;
|
|
return (_rl_allow_pathname_alphabetic_chars &&
|
|
strchr (pathname_alphabetic_chars, c) != NULL);
|
|
}
|
|
#endif
|
|
|
|
/* How to abort things. */
|
|
int
|
|
_rl_abort_internal ()
|
|
{
|
|
rl_ding ();
|
|
rl_clear_message ();
|
|
_rl_reset_argument ();
|
|
rl_clear_pending_input ();
|
|
|
|
RL_UNSETSTATE (RL_STATE_MACRODEF);
|
|
while (rl_executing_macro)
|
|
_rl_pop_executing_macro ();
|
|
|
|
rl_last_func = (rl_command_func_t *)NULL;
|
|
longjmp (_rl_top_level, 1);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
rl_abort (count, key)
|
|
int count, key;
|
|
{
|
|
return (_rl_abort_internal ());
|
|
}
|
|
|
|
int
|
|
_rl_null_function (count, key)
|
|
int count, key;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
rl_tty_status (count, key)
|
|
int count, key;
|
|
{
|
|
#if defined (TIOCSTAT)
|
|
ioctl (1, TIOCSTAT, (char *)0);
|
|
rl_refresh_line (count, key);
|
|
#else
|
|
rl_ding ();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/* Return a copy of the string between FROM and TO.
|
|
FROM is inclusive, TO is not. */
|
|
char *
|
|
rl_copy_text (from, to)
|
|
int from, to;
|
|
{
|
|
register int length;
|
|
char *copy;
|
|
|
|
/* Fix it if the caller is confused. */
|
|
if (from > to)
|
|
SWAP (from, to);
|
|
|
|
length = to - from;
|
|
copy = (char *)xmalloc (1 + length);
|
|
strncpy (copy, rl_line_buffer + from, length);
|
|
copy[length] = '\0';
|
|
return (copy);
|
|
}
|
|
|
|
/* Increase the size of RL_LINE_BUFFER until it has enough space to hold
|
|
LEN characters. */
|
|
void
|
|
rl_extend_line_buffer (len)
|
|
int len;
|
|
{
|
|
while (len >= rl_line_buffer_len)
|
|
{
|
|
rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
|
|
rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len);
|
|
}
|
|
|
|
_rl_set_the_line ();
|
|
}
|
|
|
|
|
|
/* A function for simple tilde expansion. */
|
|
int
|
|
rl_tilde_expand (ignore, key)
|
|
int ignore, key;
|
|
{
|
|
register int start, end;
|
|
char *homedir, *temp;
|
|
int len;
|
|
|
|
end = rl_point;
|
|
start = end - 1;
|
|
|
|
if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
|
|
{
|
|
homedir = tilde_expand ("~");
|
|
_rl_replace_text (homedir, start, end);
|
|
xfree (homedir);
|
|
return (0);
|
|
}
|
|
else if (rl_line_buffer[start] != '~')
|
|
{
|
|
for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--)
|
|
;
|
|
start++;
|
|
}
|
|
|
|
end = start;
|
|
do
|
|
end++;
|
|
while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end);
|
|
|
|
if (whitespace (rl_line_buffer[end]) || end >= rl_end)
|
|
end--;
|
|
|
|
/* If the first character of the current word is a tilde, perform
|
|
tilde expansion and insert the result. If not a tilde, do
|
|
nothing. */
|
|
if (rl_line_buffer[start] == '~')
|
|
{
|
|
len = end - start + 1;
|
|
temp = (char *)xmalloc (len + 1);
|
|
strncpy (temp, rl_line_buffer + start, len);
|
|
temp[len] = '\0';
|
|
homedir = tilde_expand (temp);
|
|
xfree (temp);
|
|
|
|
_rl_replace_text (homedir, start, end);
|
|
xfree (homedir);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
#if defined (USE_VARARGS)
|
|
void
|
|
#if defined (PREFER_STDARG)
|
|
_rl_ttymsg (const char *format, ...)
|
|
#else
|
|
_rl_ttymsg (va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list args;
|
|
#if defined (PREFER_VARARGS)
|
|
char *format;
|
|
#endif
|
|
|
|
#if defined (PREFER_STDARG)
|
|
va_start (args, format);
|
|
#else
|
|
va_start (args);
|
|
format = va_arg (args, char *);
|
|
#endif
|
|
|
|
fprintf (stderr, "readline: ");
|
|
vfprintf (stderr, format, args);
|
|
fprintf (stderr, "\n");
|
|
fflush (stderr);
|
|
|
|
va_end (args);
|
|
|
|
rl_forced_update_display ();
|
|
}
|
|
|
|
void
|
|
#if defined (PREFER_STDARG)
|
|
_rl_errmsg (const char *format, ...)
|
|
#else
|
|
_rl_errmsg (va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list args;
|
|
#if defined (PREFER_VARARGS)
|
|
char *format;
|
|
#endif
|
|
|
|
#if defined (PREFER_STDARG)
|
|
va_start (args, format);
|
|
#else
|
|
va_start (args);
|
|
format = va_arg (args, char *);
|
|
#endif
|
|
|
|
fprintf (stderr, "readline: ");
|
|
vfprintf (stderr, format, args);
|
|
fprintf (stderr, "\n");
|
|
fflush (stderr);
|
|
|
|
va_end (args);
|
|
}
|
|
|
|
#else /* !USE_VARARGS */
|
|
void
|
|
_rl_ttymsg (format, arg1, arg2)
|
|
char *format;
|
|
{
|
|
fprintf (stderr, "readline: ");
|
|
fprintf (stderr, format, arg1, arg2);
|
|
fprintf (stderr, "\n");
|
|
|
|
rl_forced_update_display ();
|
|
}
|
|
|
|
void
|
|
_rl_errmsg (format, arg1, arg2)
|
|
char *format;
|
|
{
|
|
fprintf (stderr, "readline: ");
|
|
fprintf (stderr, format, arg1, arg2);
|
|
fprintf (stderr, "\n");
|
|
}
|
|
#endif /* !USE_VARARGS */
|
|
|
|
/* **************************************************************** */
|
|
/* */
|
|
/* String Utility Functions */
|
|
/* */
|
|
/* **************************************************************** */
|
|
|
|
/* Determine if s2 occurs in s1. If so, return a pointer to the
|
|
match in s1. The compare is case insensitive. */
|
|
char *
|
|
_rl_strindex (s1, s2)
|
|
register const char *s1, *s2;
|
|
{
|
|
register int i, l, len;
|
|
|
|
for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
|
|
if (_rl_strnicmp (s1 + i, s2, l) == 0)
|
|
return ((char *) (s1 + i));
|
|
return ((char *)NULL);
|
|
}
|
|
|
|
#ifndef HAVE_STRPBRK
|
|
/* Find the first occurrence in STRING1 of any character from STRING2.
|
|
Return a pointer to the character in STRING1. */
|
|
char *
|
|
_rl_strpbrk (string1, string2)
|
|
const char *string1, *string2;
|
|
{
|
|
register const char *scan;
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
mbstate_t ps;
|
|
register int i, v;
|
|
|
|
memset (&ps, 0, sizeof (mbstate_t));
|
|
#endif
|
|
|
|
for (; *string1; string1++)
|
|
{
|
|
for (scan = string2; *scan; scan++)
|
|
{
|
|
if (*string1 == *scan)
|
|
return ((char *)string1);
|
|
}
|
|
#if defined (HANDLE_MULTIBYTE)
|
|
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
|
|
{
|
|
v = _rl_get_char_len (string1, &ps);
|
|
if (v > 1)
|
|
string1 += v - 1; /* -1 to account for auto-increment in loop */
|
|
}
|
|
#endif
|
|
}
|
|
return ((char *)NULL);
|
|
}
|
|
#endif
|
|
|
|
#if !defined (HAVE_STRCASECMP)
|
|
/* Compare at most COUNT characters from string1 to string2. Case
|
|
doesn't matter (strncasecmp). */
|
|
int
|
|
_rl_strnicmp (string1, string2, count)
|
|
char *string1, *string2;
|
|
int count;
|
|
{
|
|
register char *s1, *s2;
|
|
int d;
|
|
|
|
if (count <= 0 || (string1 == string2))
|
|
return 0;
|
|
|
|
s1 = string1;
|
|
s2 = string2;
|
|
do
|
|
{
|
|
d = _rl_to_lower (*s1) - _rl_to_lower (*s2); /* XXX - cast to unsigned char? */
|
|
if (d != 0)
|
|
return d;
|
|
if (*s1++ == '\0')
|
|
break;
|
|
s2++;
|
|
}
|
|
while (--count != 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* strcmp (), but caseless (strcasecmp). */
|
|
int
|
|
_rl_stricmp (string1, string2)
|
|
char *string1, *string2;
|
|
{
|
|
register char *s1, *s2;
|
|
int d;
|
|
|
|
s1 = string1;
|
|
s2 = string2;
|
|
|
|
if (s1 == s2)
|
|
return 0;
|
|
|
|
while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0)
|
|
{
|
|
if (*s1++ == '\0')
|
|
return 0;
|
|
s2++;
|
|
}
|
|
|
|
return (d);
|
|
}
|
|
#endif /* !HAVE_STRCASECMP */
|
|
|
|
/* Stupid comparison routine for qsort () ing strings. */
|
|
int
|
|
_rl_qsort_string_compare (s1, s2)
|
|
char **s1, **s2;
|
|
{
|
|
#if defined (HAVE_STRCOLL)
|
|
return (strcoll (*s1, *s2));
|
|
#else
|
|
int result;
|
|
|
|
result = **s1 - **s2;
|
|
if (result == 0)
|
|
result = strcmp (*s1, *s2);
|
|
|
|
return result;
|
|
#endif
|
|
}
|
|
|
|
/* Function equivalents for the macros defined in chardefs.h. */
|
|
#define FUNCTION_FOR_MACRO(f) int (f) (c) int c; { return f (c); }
|
|
|
|
FUNCTION_FOR_MACRO (_rl_digit_p)
|
|
FUNCTION_FOR_MACRO (_rl_digit_value)
|
|
FUNCTION_FOR_MACRO (_rl_lowercase_p)
|
|
FUNCTION_FOR_MACRO (_rl_pure_alphabetic)
|
|
FUNCTION_FOR_MACRO (_rl_to_lower)
|
|
FUNCTION_FOR_MACRO (_rl_to_upper)
|
|
FUNCTION_FOR_MACRO (_rl_uppercase_p)
|
|
|
|
/* A convenience function, to force memory deallocation to be performed
|
|
by readline. DLLs on Windows apparently require this. */
|
|
void
|
|
rl_free (mem)
|
|
void *mem;
|
|
{
|
|
if (mem)
|
|
free (mem);
|
|
}
|
|
|
|
/* Backwards compatibility, now that savestring has been removed from
|
|
all `public' readline header files. */
|
|
#undef _rl_savestring
|
|
char *
|
|
_rl_savestring (s)
|
|
const char *s;
|
|
{
|
|
return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s)));
|
|
}
|
|
|
|
#if defined (USE_VARARGS)
|
|
static FILE *_rl_tracefp;
|
|
|
|
void
|
|
#if defined (PREFER_STDARG)
|
|
_rl_trace (const char *format, ...)
|
|
#else
|
|
_rl_trace (va_alist)
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list args;
|
|
#if defined (PREFER_VARARGS)
|
|
char *format;
|
|
#endif
|
|
|
|
#if defined (PREFER_STDARG)
|
|
va_start (args, format);
|
|
#else
|
|
va_start (args);
|
|
format = va_arg (args, char *);
|
|
#endif
|
|
|
|
if (_rl_tracefp == 0)
|
|
_rl_tropen ();
|
|
vfprintf (_rl_tracefp, format, args);
|
|
fprintf (_rl_tracefp, "\n");
|
|
fflush (_rl_tracefp);
|
|
|
|
va_end (args);
|
|
}
|
|
|
|
int
|
|
_rl_tropen ()
|
|
{
|
|
char fnbuf[128];
|
|
|
|
if (_rl_tracefp)
|
|
fclose (_rl_tracefp);
|
|
sprintf (fnbuf, "/var/tmp/rltrace.%ld", getpid());
|
|
unlink(fnbuf);
|
|
_rl_tracefp = fopen (fnbuf, "w+");
|
|
return _rl_tracefp != 0;
|
|
}
|
|
|
|
int
|
|
_rl_trclose ()
|
|
{
|
|
int r;
|
|
|
|
r = fclose (_rl_tracefp);
|
|
_rl_tracefp = 0;
|
|
return r;
|
|
}
|
|
|
|
#endif
|