freebsd-dev/contrib/libreadline/util.c
1997-01-05 12:24:15 +00:00

313 lines
6.6 KiB
C

/* util.c -- readline utility functions */
/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
This file is part of the GNU Readline Library, a library for
reading lines of text with interactive input and history editing.
The GNU Readline Library 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 1, or
(at your option) any later version.
The GNU Readline Library 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.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
675 Mass Ave, Cambridge, MA 02139, USA. */
#define READLINE_LIBRARY
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <setjmp.h>
#include <ctype.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 */
/* System-specific feature definitions and include files. */
#include "rldefs.h"
#if defined (TIOCSTAT_IN_SYS_IOCTL)
# include <sys/ioctl.h>
#endif /* TIOCSTAT_IN_SYS_IOCTL */
/* Some standard library routines. */
#include "readline.h"
#define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0)
/* Pseudo-globals imported from readline.c */
extern int readline_echoing_p;
extern jmp_buf readline_top_level;
extern int rl_line_buffer_len;
extern Function *rl_last_func;
extern int _rl_defining_kbd_macro;
extern char *_rl_executing_macro;
/* Pseudo-global functions imported from other library files. */
extern void _rl_pop_executing_macro ();
extern void _rl_set_the_line ();
extern void _rl_init_argument ();
extern char *xmalloc (), *xrealloc ();
/* **************************************************************** */
/* */
/* 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 char *pathname_alphabetic_chars = "/-_=~.#$";
int
alphabetic (c)
int c;
{
if (ALPHABETIC (c))
return (1);
return (_rl_allow_pathname_alphabetic_chars &&
strchr (pathname_alphabetic_chars, c) != NULL);
}
/* How to abort things. */
int
_rl_abort_internal ()
{
ding ();
rl_clear_message ();
_rl_init_argument ();
rl_pending_input = 0;
_rl_defining_kbd_macro = 0;
while (_rl_executing_macro)
_rl_pop_executing_macro ();
rl_last_func = (Function *)NULL;
longjmp (readline_top_level, 1);
return (0);
}
int
rl_abort (count, key)
int count, key;
{
return (_rl_abort_internal ());
}
int
rl_tty_status (count, key)
int count, key;
{
#if defined (TIOCSTAT)
ioctl (1, TIOCSTAT, (char *)0);
rl_refresh_line ();
#else
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 = 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 = xrealloc (rl_line_buffer, rl_line_buffer_len);
}
_rl_set_the_line ();
}
/* **************************************************************** */
/* */
/* 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 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 (s1 + i);
return ((char *)NULL);
}
#if !defined (HAVE_STRCASECMP)
/* Compare at most COUNT characters from string1 to string2. Case
doesn't matter. */
int
_rl_strnicmp (string1, string2, count)
char *string1, *string2;
int count;
{
register char ch1, ch2;
while (count)
{
ch1 = *string1++;
ch2 = *string2++;
if (_rl_to_upper(ch1) == _rl_to_upper(ch2))
count--;
else
break;
}
return (count);
}
/* strcmp (), but caseless. */
int
_rl_stricmp (string1, string2)
char *string1, *string2;
{
register char ch1, ch2;
while (*string1 && *string2)
{
ch1 = *string1++;
ch2 = *string2++;
if (_rl_to_upper(ch1) != _rl_to_upper(ch2))
return (1);
}
return (*string1 - *string2);
}
#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
}
#if !defined (SHELL)
/* Backwards compatibility, now that savestring has been removed from
all `public' readline header files. */
char *
rl_savestring (s)
char *s;
{
return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s)));
}
#endif /* !SHELL */
/* Function equivalents for the macros defined in chartypes.h. */
#undef _rl_uppercase_p
int
_rl_uppercase_p (c)
int c;
{
return (isupper (c));
}
#undef _rl_lowercase_p
int
_rl_lowercase_p (c)
int c;
{
return (islower (c));
}
#undef _rl_pure_alphabetic
int
_rl_pure_alphabetic (c)
int c;
{
return (isupper (c) || islower (c));
}
#undef _rl_digit_p
int
_rl_digit_p (c)
int c;
{
return (isdigit (c));
}
#undef _rl_to_lower
int
_rl_to_lower (c)
int c;
{
return (isupper (c) ? tolower (c) : c);
}
#undef _rl_to_upper
int
_rl_to_upper (c)
int c;
{
return (islower (c) ? toupper (c) : c);
}
#undef _rl_digit_value
int
_rl_digit_value (c)
int c;
{
return (isdigit (c) ? c - '0' : c);
}