macro.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:7k
- /* macro.c -- keyboard macros for readline. */
- /* Copyright (C) 1994 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 <sys/types.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>
- /* System-specific feature definitions and include files. */
- #include "rldefs.h"
- /* Some standard library routines. */
- #include "readline.h"
- #include "history.h"
- #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0)
- /* Forward definitions. */
- void _rl_push_executing_macro (), _rl_pop_executing_macro ();
- void _rl_add_macro_char ();
- /* Extern declarations. */
- extern int rl_explicit_arg;
- extern int rl_key_sequence_length;
- extern void _rl_abort_internal ();
- extern char *xmalloc (), *xrealloc ();
- /* **************************************************************** */
- /* */
- /* Hacking Keyboard Macros */
- /* */
- /* **************************************************************** */
- /* Non-zero means to save keys that we dispatch on in a kbd macro. */
- int _rl_defining_kbd_macro = 0;
- /* The currently executing macro string. If this is non-zero,
- then it is a malloc ()'ed string where input is coming from. */
- char *_rl_executing_macro = (char *)NULL;
- /* The offset in the above string to the next character to be read. */
- static int executing_macro_index;
- /* The current macro string being built. Characters get stuffed
- in here by add_macro_char (). */
- static char *current_macro = (char *)NULL;
- /* The size of the buffer allocated to current_macro. */
- static int current_macro_size;
- /* The index at which characters are being added to current_macro. */
- static int current_macro_index;
- /* A structure used to save nested macro strings.
- It is a linked list of string/index for each saved macro. */
- struct saved_macro {
- struct saved_macro *next;
- char *string;
- int sindex;
- };
- /* The list of saved macros. */
- static struct saved_macro *macro_list = (struct saved_macro *)NULL;
- /* Set up to read subsequent input from STRING.
- STRING is free ()'ed when we are done with it. */
- void
- _rl_with_macro_input (string)
- char *string;
- {
- _rl_push_executing_macro ();
- _rl_executing_macro = string;
- executing_macro_index = 0;
- }
- /* Return the next character available from a macro, or 0 if
- there are no macro characters. */
- int
- _rl_next_macro_key ()
- {
- if (_rl_executing_macro == 0)
- return (0);
- if (_rl_executing_macro[executing_macro_index] == 0)
- {
- _rl_pop_executing_macro ();
- return (_rl_next_macro_key ());
- }
- return (_rl_executing_macro[executing_macro_index++]);
- }
- /* Save the currently executing macro on a stack of saved macros. */
- void
- _rl_push_executing_macro ()
- {
- struct saved_macro *saver;
- saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro));
- saver->next = macro_list;
- saver->sindex = executing_macro_index;
- saver->string = _rl_executing_macro;
- macro_list = saver;
- }
- /* Discard the current macro, replacing it with the one
- on the top of the stack of saved macros. */
- void
- _rl_pop_executing_macro ()
- {
- struct saved_macro *macro;
- if (_rl_executing_macro)
- free (_rl_executing_macro);
- _rl_executing_macro = (char *)NULL;
- executing_macro_index = 0;
- if (macro_list)
- {
- macro = macro_list;
- _rl_executing_macro = macro_list->string;
- executing_macro_index = macro_list->sindex;
- macro_list = macro_list->next;
- free (macro);
- }
- }
- /* Add a character to the macro being built. */
- void
- _rl_add_macro_char (c)
- int c;
- {
- if (current_macro_index + 1 >= current_macro_size)
- {
- if (current_macro == 0)
- current_macro = xmalloc (current_macro_size = 25);
- else
- current_macro = xrealloc (current_macro, current_macro_size += 25);
- }
- current_macro[current_macro_index++] = c;
- current_macro[current_macro_index] = ' ';
- }
- void
- _rl_kill_kbd_macro ()
- {
- if (current_macro)
- {
- free (current_macro);
- current_macro = (char *) NULL;
- }
- current_macro_size = current_macro_index = 0;
- if (_rl_executing_macro)
- {
- free (_rl_executing_macro);
- _rl_executing_macro = (char *) NULL;
- }
- executing_macro_index = 0;
- _rl_defining_kbd_macro = 0;
- }
- /* Begin defining a keyboard macro.
- Keystrokes are recorded as they are executed.
- End the definition with rl_end_kbd_macro ().
- If a numeric argument was explicitly typed, then append this
- definition to the end of the existing macro, and start by
- re-executing the existing macro. */
- int
- rl_start_kbd_macro (ignore1, ignore2)
- int ignore1, ignore2;
- {
- if (_rl_defining_kbd_macro)
- {
- _rl_abort_internal ();
- return -1;
- }
- if (rl_explicit_arg)
- {
- if (current_macro)
- _rl_with_macro_input (savestring (current_macro));
- }
- else
- current_macro_index = 0;
- _rl_defining_kbd_macro = 1;
- return 0;
- }
- /* Stop defining a keyboard macro.
- A numeric argument says to execute the macro right now,
- that many times, counting the definition as the first time. */
- int
- rl_end_kbd_macro (count, ignore)
- int count, ignore;
- {
- if (_rl_defining_kbd_macro == 0)
- {
- _rl_abort_internal ();
- return -1;
- }
- current_macro_index -= rl_key_sequence_length - 1;
- current_macro[current_macro_index] = ' ';
- _rl_defining_kbd_macro = 0;
- return (rl_call_last_kbd_macro (--count, 0));
- }
- /* Execute the most recently defined keyboard macro.
- COUNT says how many times to execute it. */
- int
- rl_call_last_kbd_macro (count, ignore)
- int count, ignore;
- {
- if (current_macro == 0)
- _rl_abort_internal ();
- if (_rl_defining_kbd_macro)
- {
- ding (); /* no recursive macros */
- current_macro[--current_macro_index] = ' '; /* erase this char */
- return 0;
- }
- while (count--)
- _rl_with_macro_input (savestring (current_macro));
- return 0;
- }
- void
- rl_push_macro_input (macro)
- char *macro;
- {
- _rl_with_macro_input (macro);
- }