313 lines
6.6 KiB
C
313 lines
6.6 KiB
C
/* util.c -- readline utility functions */
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/* Copyright (C) 1987, 1989, 1992 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library, a library for
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reading lines of text with interactive input and history editing.
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The GNU Readline Library is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 1, or
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(at your option) any later version.
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The GNU Readline Library is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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The GNU General Public License is often shipped with GNU software, and
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is generally kept in a file called COPYING or LICENSE. If you do not
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have a copy of the license, write to the Free Software Foundation,
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675 Mass Ave, Cambridge, MA 02139, USA. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <setjmp.h>
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#include <ctype.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h> /* for _POSIX_VERSION */
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#endif /* HAVE_UNISTD_H */
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#if defined (HAVE_STDLIB_H)
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# include <stdlib.h>
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#else
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# include "ansi_stdlib.h"
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#endif /* HAVE_STDLIB_H */
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/* System-specific feature definitions and include files. */
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#include "rldefs.h"
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#if defined (TIOCSTAT_IN_SYS_IOCTL)
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# include <sys/ioctl.h>
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#endif /* TIOCSTAT_IN_SYS_IOCTL */
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/* Some standard library routines. */
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#include "readline.h"
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#define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0)
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/* Pseudo-globals imported from readline.c */
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extern int readline_echoing_p;
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extern jmp_buf readline_top_level;
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extern int rl_line_buffer_len;
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extern Function *rl_last_func;
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extern int _rl_defining_kbd_macro;
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extern char *_rl_executing_macro;
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/* Pseudo-global functions imported from other library files. */
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extern void _rl_pop_executing_macro ();
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extern void _rl_set_the_line ();
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extern void _rl_init_argument ();
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extern char *xmalloc (), *xrealloc ();
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/* **************************************************************** */
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/* */
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/* Utility Functions */
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/* */
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/* **************************************************************** */
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/* Return 0 if C is not a member of the class of characters that belong
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in words, or 1 if it is. */
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int _rl_allow_pathname_alphabetic_chars = 0;
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static char *pathname_alphabetic_chars = "/-_=~.#$";
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int
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alphabetic (c)
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int c;
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{
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if (ALPHABETIC (c))
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return (1);
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return (_rl_allow_pathname_alphabetic_chars &&
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strchr (pathname_alphabetic_chars, c) != NULL);
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}
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/* How to abort things. */
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int
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_rl_abort_internal ()
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{
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ding ();
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rl_clear_message ();
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_rl_init_argument ();
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rl_pending_input = 0;
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_rl_defining_kbd_macro = 0;
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while (_rl_executing_macro)
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_rl_pop_executing_macro ();
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rl_last_func = (Function *)NULL;
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longjmp (readline_top_level, 1);
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return (0);
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}
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int
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rl_abort (count, key)
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int count, key;
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{
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return (_rl_abort_internal ());
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}
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int
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rl_tty_status (count, key)
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int count, key;
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{
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#if defined (TIOCSTAT)
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ioctl (1, TIOCSTAT, (char *)0);
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rl_refresh_line ();
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#else
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ding ();
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#endif
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return 0;
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}
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/* Return a copy of the string between FROM and TO.
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FROM is inclusive, TO is not. */
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char *
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rl_copy_text (from, to)
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int from, to;
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{
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register int length;
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char *copy;
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/* Fix it if the caller is confused. */
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if (from > to)
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SWAP (from, to);
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length = to - from;
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copy = xmalloc (1 + length);
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strncpy (copy, rl_line_buffer + from, length);
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copy[length] = '\0';
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return (copy);
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}
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/* Increase the size of RL_LINE_BUFFER until it has enough space to hold
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LEN characters. */
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void
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rl_extend_line_buffer (len)
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int len;
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{
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while (len >= rl_line_buffer_len)
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{
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rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
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rl_line_buffer = xrealloc (rl_line_buffer, rl_line_buffer_len);
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}
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_rl_set_the_line ();
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}
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/* **************************************************************** */
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/* */
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/* String Utility Functions */
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/* */
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/* **************************************************************** */
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/* Determine if s2 occurs in s1. If so, return a pointer to the
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match in s1. The compare is case insensitive. */
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char *
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_rl_strindex (s1, s2)
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register char *s1, *s2;
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{
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register int i, l, len;
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for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
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if (_rl_strnicmp (s1 + i, s2, l) == 0)
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return (s1 + i);
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return ((char *)NULL);
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}
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#if !defined (HAVE_STRCASECMP)
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/* Compare at most COUNT characters from string1 to string2. Case
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doesn't matter. */
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int
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_rl_strnicmp (string1, string2, count)
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char *string1, *string2;
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int count;
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{
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register char ch1, ch2;
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while (count)
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{
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ch1 = *string1++;
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ch2 = *string2++;
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if (_rl_to_upper(ch1) == _rl_to_upper(ch2))
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count--;
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else
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break;
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}
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return (count);
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}
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/* strcmp (), but caseless. */
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int
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_rl_stricmp (string1, string2)
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char *string1, *string2;
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{
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register char ch1, ch2;
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while (*string1 && *string2)
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{
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ch1 = *string1++;
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ch2 = *string2++;
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if (_rl_to_upper(ch1) != _rl_to_upper(ch2))
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return (1);
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}
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return (*string1 - *string2);
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}
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#endif /* !HAVE_STRCASECMP */
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/* Stupid comparison routine for qsort () ing strings. */
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int
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_rl_qsort_string_compare (s1, s2)
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char **s1, **s2;
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{
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#if defined (HAVE_STRCOLL)
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return (strcoll (*s1, *s2));
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#else
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int result;
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result = **s1 - **s2;
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if (result == 0)
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result = strcmp (*s1, *s2);
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return result;
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#endif
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}
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#if !defined (SHELL)
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/* Backwards compatibility, now that savestring has been removed from
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all `public' readline header files. */
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char *
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rl_savestring (s)
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char *s;
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{
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return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s)));
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}
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#endif /* !SHELL */
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/* Function equivalents for the macros defined in chartypes.h. */
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#undef _rl_uppercase_p
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int
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_rl_uppercase_p (c)
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int c;
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{
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return (isupper (c));
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}
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#undef _rl_lowercase_p
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int
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_rl_lowercase_p (c)
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int c;
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{
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return (islower (c));
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}
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#undef _rl_pure_alphabetic
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int
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_rl_pure_alphabetic (c)
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int c;
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{
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return (isupper (c) || islower (c));
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}
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#undef _rl_digit_p
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int
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_rl_digit_p (c)
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int c;
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{
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return (isdigit (c));
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}
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#undef _rl_to_lower
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int
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_rl_to_lower (c)
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int c;
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{
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return (isupper (c) ? tolower (c) : c);
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}
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#undef _rl_to_upper
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int
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_rl_to_upper (c)
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int c;
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{
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return (islower (c) ? toupper (c) : c);
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}
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#undef _rl_digit_value
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int
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_rl_digit_value (c)
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int c;
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{
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return (isdigit (c) ? c - '0' : c);
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}
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