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360 lines
8.4 KiB
C
360 lines
8.4 KiB
C
/* util.c -- readline utility functions */
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/* Copyright (C) 1987-2005 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 2, 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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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA. */
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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# include "config_readline.h"
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#endif
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#include <sys/types.h>
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#include <fcntl.h>
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#include "posixjmp.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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#include <stdio.h>
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#include <ctype.h>
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/* System-specific feature definitions and include files. */
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#include "rldefs.h"
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#include "rlmbutil.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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#include "rlprivate.h"
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#include "xmalloc.h"
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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 const char *pathname_alphabetic_chars = "/-_=~.#$";
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int
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rl_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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#if defined (HANDLE_MULTIBYTE)
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int
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/*
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Portability issue with VisualAge C++ Professional / C for AIX Compiler, Version 6:
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"util.c", line 84.1: 1506-343 (S) Redeclaration of _rl_walphabetic differs
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from previous declaration on line 110 of "rlmbutil.h".
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So, put type in the function signature here.
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*/
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_rl_walphabetic (wchar_t wc)
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{
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int c;
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if (iswalnum (wc))
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return (1);
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c = wc & 0177;
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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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#endif
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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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rl_ding ();
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rl_clear_message ();
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_rl_reset_argument ();
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rl_clear_pending_input ();
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RL_UNSETSTATE (RL_STATE_MACRODEF);
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while (rl_executing_macro)
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_rl_pop_executing_macro ();
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rl_last_func = (rl_command_func_t *)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 __attribute__((unused)), key __attribute__((unused));
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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 __attribute__((unused)), key __attribute__((unused));
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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 (count, key);
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#else
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rl_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 = (char *)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 = (char *)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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/* A function for simple tilde expansion. */
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int
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rl_tilde_expand (ignore, key)
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int ignore __attribute__((unused)), key __attribute__((unused));
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{
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register int start, end;
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char *homedir, *temp;
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int len;
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end = rl_point;
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start = end - 1;
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if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
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{
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homedir = tilde_expand ("~");
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_rl_replace_text (homedir, start, end);
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return (0);
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}
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else if (rl_line_buffer[start] != '~')
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{
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for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--)
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;
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start++;
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}
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end = start;
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do
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end++;
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while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end);
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if (whitespace (rl_line_buffer[end]) || end >= rl_end)
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end--;
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/* If the first character of the current word is a tilde, perform
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tilde expansion and insert the result. If not a tilde, do
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nothing. */
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if (rl_line_buffer[start] == '~')
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{
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len = end - start + 1;
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temp = (char *)xmalloc (len + 1);
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strncpy (temp, rl_line_buffer + start, len);
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temp[len] = '\0';
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homedir = tilde_expand (temp);
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free (temp);
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_rl_replace_text (homedir, start, end);
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}
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return (0);
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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 const 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 ((char *) (s1 + i));
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return ((char *)NULL);
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}
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#ifndef HAVE_STRPBRK
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/* Find the first occurrence in STRING1 of any character from STRING2.
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Return a pointer to the character in STRING1. */
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char *
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_rl_strpbrk (string1, string2)
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const char *string1, *string2;
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{
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register const char *scan;
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#if defined (HANDLE_MULTIBYTE)
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mbstate_t ps;
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register int i, v;
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memset (&ps, 0, sizeof (mbstate_t));
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#endif
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for (; *string1; string1++)
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{
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for (scan = string2; *scan; scan++)
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{
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if (*string1 == *scan)
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return ((char *)string1);
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}
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#if defined (HANDLE_MULTIBYTE)
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if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
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{
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v = _rl_get_char_len (string1, &ps);
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if (v > 1)
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string1 += v - 1; /* -1 to account for auto-increment in loop */
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}
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#endif
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}
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return ((char *)NULL);
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}
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#endif
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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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/* Function equivalents for the macros defined in chardefs.h. */
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#define FUNCTION_FOR_MACRO(f) int (f) (c) int c; { return f (c); }
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FUNCTION_FOR_MACRO (_rl_digit_p)
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FUNCTION_FOR_MACRO (_rl_digit_value)
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FUNCTION_FOR_MACRO (_rl_lowercase_p)
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FUNCTION_FOR_MACRO (_rl_pure_alphabetic)
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FUNCTION_FOR_MACRO (_rl_to_lower)
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FUNCTION_FOR_MACRO (_rl_to_upper)
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FUNCTION_FOR_MACRO (_rl_uppercase_p)
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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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#undef _rl_savestring
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char *
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_rl_savestring (s)
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const char *s;
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{
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return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s)));
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}
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