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Diffstat (limited to 'macro.c')
| -rw-r--r-- | macro.c | 332 |
1 files changed, 332 insertions, 0 deletions
@@ -0,0 +1,332 @@ +/* macro.c -- keyboard macros for readline. */ + +/* Copyright (C) 1994-2009,2017 Free Software Foundation, Inc. + + This file is part of the GNU Readline Library (Readline), a library + for reading lines of text with interactive input and history editing. + + Readline 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 3 of the License, or + (at your option) any later version. + + Readline 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. + + You should have received a copy of the GNU General Public License + along with Readline. If not, see <http://www.gnu.org/licenses/>. +*/ + +#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" + +#include "rlprivate.h" +#include "xmalloc.h" + +#define MAX_MACRO_LEVEL 16 + +/* **************************************************************** */ +/* */ +/* Hacking Keyboard Macros */ +/* */ +/* **************************************************************** */ + +/* 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; + +static int macro_level = 0; + +/* Set up to read subsequent input from STRING. + STRING is free ()'ed when we are done with it. */ +void +_rl_with_macro_input (char *string) +{ + if (macro_level > MAX_MACRO_LEVEL) + { + _rl_errmsg ("maximum macro execution nesting level exceeded"); + _rl_abort_internal (); + return; + } + +#if 0 + if (rl_executing_macro) /* XXX - later */ +#endif + _rl_push_executing_macro (); + rl_executing_macro = string; + executing_macro_index = 0; + RL_SETSTATE(RL_STATE_MACROINPUT); +} + +/* Return the next character available from a macro, or 0 if + there are no macro characters. */ +int +_rl_next_macro_key (void) +{ + int c; + + if (rl_executing_macro == 0) + return (0); + + if (rl_executing_macro[executing_macro_index] == 0) + { + _rl_pop_executing_macro (); + return (_rl_next_macro_key ()); + } + +#if defined (READLINE_CALLBACKS) + c = rl_executing_macro[executing_macro_index++]; + if (RL_ISSTATE (RL_STATE_CALLBACK) && RL_ISSTATE (RL_STATE_READCMD|RL_STATE_MOREINPUT) && rl_executing_macro[executing_macro_index] == 0) + _rl_pop_executing_macro (); + return c; +#else + /* XXX - consider doing the same as the callback code, just not testing + whether we're running in callback mode */ + return (rl_executing_macro[executing_macro_index++]); +#endif +} + +int +_rl_peek_macro_key (void) +{ + if (rl_executing_macro == 0) + return (0); + if (rl_executing_macro[executing_macro_index] == 0 && (macro_list == 0 || macro_list->string == 0)) + return (0); + if (rl_executing_macro[executing_macro_index] == 0 && macro_list && macro_list->string) + return (macro_list->string[0]); + return (rl_executing_macro[executing_macro_index]); +} + +int +_rl_prev_macro_key (void) +{ + if (rl_executing_macro == 0) + return (0); + + if (executing_macro_index == 0) + return (0); + + executing_macro_index--; + return (rl_executing_macro[executing_macro_index]); +} + +/* Save the currently executing macro on a stack of saved macros. */ +void +_rl_push_executing_macro (void) +{ + 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; + + macro_level++; +} + +/* Discard the current macro, replacing it with the one + on the top of the stack of saved macros. */ +void +_rl_pop_executing_macro (void) +{ + struct saved_macro *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; + xfree (macro); + } + + macro_level--; + + if (rl_executing_macro == 0) + RL_UNSETSTATE(RL_STATE_MACROINPUT); +} + +/* Add a character to the macro being built. */ +void +_rl_add_macro_char (int c) +{ + if (current_macro_index + 1 >= current_macro_size) + { + if (current_macro == 0) + current_macro = (char *)xmalloc (current_macro_size = 25); + else + current_macro = (char *)xrealloc (current_macro, current_macro_size += 25); + } + + current_macro[current_macro_index++] = c; + current_macro[current_macro_index] = '\0'; +} + +void +_rl_kill_kbd_macro (void) +{ + if (current_macro) + { + xfree (current_macro); + current_macro = (char *) NULL; + } + current_macro_size = current_macro_index = 0; + + FREE (rl_executing_macro); + rl_executing_macro = (char *) NULL; + executing_macro_index = 0; + + RL_UNSETSTATE(RL_STATE_MACRODEF); +} + +/* 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 (int ignore1, int ignore2) +{ + if (RL_ISSTATE (RL_STATE_MACRODEF)) + { + _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_SETSTATE(RL_STATE_MACRODEF); + 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 (int count, int ignore) +{ + if (RL_ISSTATE (RL_STATE_MACRODEF) == 0) + { + _rl_abort_internal (); + return 1; + } + + current_macro_index -= rl_key_sequence_length; + current_macro[current_macro_index] = '\0'; + + RL_UNSETSTATE(RL_STATE_MACRODEF); + + 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 (int count, int ignore) +{ + if (current_macro == 0) + _rl_abort_internal (); + + if (RL_ISSTATE (RL_STATE_MACRODEF)) + { + rl_ding (); /* no recursive macros */ + current_macro[--current_macro_index] = '\0'; /* erase this char */ + return 0; + } + + while (count--) + _rl_with_macro_input (savestring (current_macro)); + return 0; +} + +int +rl_print_last_kbd_macro (int count, int ignore) +{ + char *m; + + if (current_macro == 0) + { + rl_ding (); + return 0; + } + m = _rl_untranslate_macro_value (current_macro, 1); + rl_crlf (); + printf ("%s", m); + fflush (stdout); + rl_crlf (); + FREE (m); + rl_forced_update_display (); + rl_display_fixed = 1; + + return 0; +} + +void +rl_push_macro_input (char *macro) +{ + _rl_with_macro_input (macro); +} |