271 lines
6.8 KiB
C
271 lines
6.8 KiB
C
/* macro.c -- keyboard macros for readline. */
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/* Copyright (C) 1994-2009 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library (Readline), a library
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for reading lines of text with interactive input and history editing.
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Readline is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Readline is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Readline. If not, see <http://www.gnu.org/licenses/>.
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*/
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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 <sys/types.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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/* System-specific feature definitions and include files. */
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#include "rldefs.h"
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/* Some standard library routines. */
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#include "readline.h"
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#include "history.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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/* Hacking Keyboard Macros */
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/* */
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/* **************************************************************** */
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/* The currently executing macro string. If this is non-zero,
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then it is a malloc ()'ed string where input is coming from. */
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char *rl_executing_macro = (char *)NULL;
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/* The offset in the above string to the next character to be read. */
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static int executing_macro_index;
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/* The current macro string being built. Characters get stuffed
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in here by add_macro_char (). */
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static char *current_macro = (char *)NULL;
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/* The size of the buffer allocated to current_macro. */
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static int current_macro_size;
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/* The index at which characters are being added to current_macro. */
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static int current_macro_index;
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/* A structure used to save nested macro strings.
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It is a linked list of string/index for each saved macro. */
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struct saved_macro {
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struct saved_macro *next;
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char *string;
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int sindex;
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};
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/* The list of saved macros. */
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static struct saved_macro *macro_list = (struct saved_macro *)NULL;
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/* Set up to read subsequent input from STRING.
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STRING is free ()'ed when we are done with it. */
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void
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_rl_with_macro_input (string)
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char *string;
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{
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_rl_push_executing_macro ();
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rl_executing_macro = string;
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executing_macro_index = 0;
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RL_SETSTATE(RL_STATE_MACROINPUT);
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}
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/* Return the next character available from a macro, or 0 if
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there are no macro characters. */
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int
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_rl_next_macro_key ()
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{
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int c;
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if (rl_executing_macro == 0)
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return (0);
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if (rl_executing_macro[executing_macro_index] == 0)
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{
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_rl_pop_executing_macro ();
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return (_rl_next_macro_key ());
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}
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#if defined (READLINE_CALLBACKS)
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c = rl_executing_macro[executing_macro_index++];
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if (RL_ISSTATE (RL_STATE_CALLBACK) && RL_ISSTATE (RL_STATE_READCMD|RL_STATE_MOREINPUT) && rl_executing_macro[executing_macro_index] == 0)
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_rl_pop_executing_macro ();
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return c;
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#else
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return (rl_executing_macro[executing_macro_index++]);
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#endif
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}
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/* Save the currently executing macro on a stack of saved macros. */
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void
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_rl_push_executing_macro ()
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{
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struct saved_macro *saver;
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saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro));
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saver->next = macro_list;
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saver->sindex = executing_macro_index;
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saver->string = rl_executing_macro;
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macro_list = saver;
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}
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/* Discard the current macro, replacing it with the one
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on the top of the stack of saved macros. */
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void
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_rl_pop_executing_macro ()
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{
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struct saved_macro *macro;
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FREE (rl_executing_macro);
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rl_executing_macro = (char *)NULL;
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executing_macro_index = 0;
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if (macro_list)
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{
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macro = macro_list;
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rl_executing_macro = macro_list->string;
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executing_macro_index = macro_list->sindex;
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macro_list = macro_list->next;
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xfree (macro);
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}
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if (rl_executing_macro == 0)
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RL_UNSETSTATE(RL_STATE_MACROINPUT);
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}
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/* Add a character to the macro being built. */
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void
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_rl_add_macro_char (c)
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int c;
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{
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if (current_macro_index + 1 >= current_macro_size)
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{
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if (current_macro == 0)
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current_macro = (char *)xmalloc (current_macro_size = 25);
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else
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current_macro = (char *)xrealloc (current_macro, current_macro_size += 25);
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}
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current_macro[current_macro_index++] = c;
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current_macro[current_macro_index] = '\0';
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}
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void
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_rl_kill_kbd_macro ()
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{
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if (current_macro)
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{
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xfree (current_macro);
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current_macro = (char *) NULL;
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}
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current_macro_size = current_macro_index = 0;
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FREE (rl_executing_macro);
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rl_executing_macro = (char *) NULL;
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executing_macro_index = 0;
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RL_UNSETSTATE(RL_STATE_MACRODEF);
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}
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/* Begin defining a keyboard macro.
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Keystrokes are recorded as they are executed.
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End the definition with rl_end_kbd_macro ().
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If a numeric argument was explicitly typed, then append this
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definition to the end of the existing macro, and start by
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re-executing the existing macro. */
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int
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rl_start_kbd_macro (ignore1, ignore2)
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int ignore1, ignore2;
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{
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if (RL_ISSTATE (RL_STATE_MACRODEF))
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{
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_rl_abort_internal ();
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return -1;
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}
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if (rl_explicit_arg)
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{
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if (current_macro)
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_rl_with_macro_input (savestring (current_macro));
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}
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else
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current_macro_index = 0;
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RL_SETSTATE(RL_STATE_MACRODEF);
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return 0;
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}
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/* Stop defining a keyboard macro.
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A numeric argument says to execute the macro right now,
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that many times, counting the definition as the first time. */
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int
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rl_end_kbd_macro (count, ignore)
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int count, ignore;
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{
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if (RL_ISSTATE (RL_STATE_MACRODEF) == 0)
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{
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_rl_abort_internal ();
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return -1;
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}
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current_macro_index -= rl_key_sequence_length - 1;
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current_macro[current_macro_index] = '\0';
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RL_UNSETSTATE(RL_STATE_MACRODEF);
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return (rl_call_last_kbd_macro (--count, 0));
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}
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/* Execute the most recently defined keyboard macro.
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COUNT says how many times to execute it. */
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int
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rl_call_last_kbd_macro (count, ignore)
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int count, ignore;
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{
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if (current_macro == 0)
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_rl_abort_internal ();
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if (RL_ISSTATE (RL_STATE_MACRODEF))
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{
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rl_ding (); /* no recursive macros */
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current_macro[--current_macro_index] = '\0'; /* erase this char */
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return 0;
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}
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while (count--)
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_rl_with_macro_input (savestring (current_macro));
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return 0;
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}
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void
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rl_push_macro_input (macro)
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char *macro;
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{
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_rl_with_macro_input (macro);
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}
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