| 1 | /* macro.c -- keyboard macros for readline. */ |
| 2 | |
| 3 | /* Copyright (C) 1994 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the GNU Readline Library, a library for |
| 6 | reading lines of text with interactive input and history editing. |
| 7 | |
| 8 | The GNU Readline Library is free software; you can redistribute it |
| 9 | and/or modify it under the terms of the GNU General Public License |
| 10 | as published by the Free Software Foundation; either version 1, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | The GNU Readline Library is distributed in the hope that it will be |
| 14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 15 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | The GNU General Public License is often shipped with GNU software, and |
| 19 | is generally kept in a file called COPYING or LICENSE. If you do not |
| 20 | have a copy of the license, write to the Free Software Foundation, |
| 21 | 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | #define READLINE_LIBRARY |
| 23 | |
| 24 | #if defined (HAVE_CONFIG_H) |
| 25 | # include <config.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | |
| 30 | #if defined (HAVE_UNISTD_H) |
| 31 | # include <unistd.h> /* for _POSIX_VERSION */ |
| 32 | #endif /* HAVE_UNISTD_H */ |
| 33 | |
| 34 | #if defined (HAVE_STDLIB_H) |
| 35 | # include <stdlib.h> |
| 36 | #else |
| 37 | # include "ansi_stdlib.h" |
| 38 | #endif /* HAVE_STDLIB_H */ |
| 39 | |
| 40 | #include <stdio.h> |
| 41 | |
| 42 | /* System-specific feature definitions and include files. */ |
| 43 | #include "rldefs.h" |
| 44 | |
| 45 | /* Some standard library routines. */ |
| 46 | #include "readline.h" |
| 47 | #include "history.h" |
| 48 | |
| 49 | #define SWAP(s, e) do { int t; t = s; s = e; e = t; } while (0) |
| 50 | |
| 51 | /* Forward definitions. */ |
| 52 | void _rl_push_executing_macro (), _rl_pop_executing_macro (); |
| 53 | void _rl_add_macro_char (); |
| 54 | |
| 55 | /* Extern declarations. */ |
| 56 | extern int rl_explicit_arg; |
| 57 | extern int rl_key_sequence_length; |
| 58 | |
| 59 | extern void _rl_abort_internal (); |
| 60 | |
| 61 | extern char *xmalloc (), *xrealloc (); |
| 62 | |
| 63 | /* **************************************************************** */ |
| 64 | /* */ |
| 65 | /* Hacking Keyboard Macros */ |
| 66 | /* */ |
| 67 | /* **************************************************************** */ |
| 68 | |
| 69 | /* Non-zero means to save keys that we dispatch on in a kbd macro. */ |
| 70 | int _rl_defining_kbd_macro = 0; |
| 71 | |
| 72 | /* The currently executing macro string. If this is non-zero, |
| 73 | then it is a malloc ()'ed string where input is coming from. */ |
| 74 | char *_rl_executing_macro = (char *)NULL; |
| 75 | |
| 76 | /* The offset in the above string to the next character to be read. */ |
| 77 | static int executing_macro_index; |
| 78 | |
| 79 | /* The current macro string being built. Characters get stuffed |
| 80 | in here by add_macro_char (). */ |
| 81 | static char *current_macro = (char *)NULL; |
| 82 | |
| 83 | /* The size of the buffer allocated to current_macro. */ |
| 84 | static int current_macro_size; |
| 85 | |
| 86 | /* The index at which characters are being added to current_macro. */ |
| 87 | static int current_macro_index; |
| 88 | |
| 89 | /* A structure used to save nested macro strings. |
| 90 | It is a linked list of string/index for each saved macro. */ |
| 91 | struct saved_macro { |
| 92 | struct saved_macro *next; |
| 93 | char *string; |
| 94 | int sindex; |
| 95 | }; |
| 96 | |
| 97 | /* The list of saved macros. */ |
| 98 | static struct saved_macro *macro_list = (struct saved_macro *)NULL; |
| 99 | |
| 100 | /* Set up to read subsequent input from STRING. |
| 101 | STRING is free ()'ed when we are done with it. */ |
| 102 | void |
| 103 | _rl_with_macro_input (string) |
| 104 | char *string; |
| 105 | { |
| 106 | _rl_push_executing_macro (); |
| 107 | _rl_executing_macro = string; |
| 108 | executing_macro_index = 0; |
| 109 | } |
| 110 | |
| 111 | /* Return the next character available from a macro, or 0 if |
| 112 | there are no macro characters. */ |
| 113 | int |
| 114 | _rl_next_macro_key () |
| 115 | { |
| 116 | if (_rl_executing_macro == 0) |
| 117 | return (0); |
| 118 | |
| 119 | if (_rl_executing_macro[executing_macro_index] == 0) |
| 120 | { |
| 121 | _rl_pop_executing_macro (); |
| 122 | return (_rl_next_macro_key ()); |
| 123 | } |
| 124 | |
| 125 | return (_rl_executing_macro[executing_macro_index++]); |
| 126 | } |
| 127 | |
| 128 | /* Save the currently executing macro on a stack of saved macros. */ |
| 129 | void |
| 130 | _rl_push_executing_macro () |
| 131 | { |
| 132 | struct saved_macro *saver; |
| 133 | |
| 134 | saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro)); |
| 135 | saver->next = macro_list; |
| 136 | saver->sindex = executing_macro_index; |
| 137 | saver->string = _rl_executing_macro; |
| 138 | |
| 139 | macro_list = saver; |
| 140 | } |
| 141 | |
| 142 | /* Discard the current macro, replacing it with the one |
| 143 | on the top of the stack of saved macros. */ |
| 144 | void |
| 145 | _rl_pop_executing_macro () |
| 146 | { |
| 147 | struct saved_macro *macro; |
| 148 | |
| 149 | if (_rl_executing_macro) |
| 150 | free (_rl_executing_macro); |
| 151 | |
| 152 | _rl_executing_macro = (char *)NULL; |
| 153 | executing_macro_index = 0; |
| 154 | |
| 155 | if (macro_list) |
| 156 | { |
| 157 | macro = macro_list; |
| 158 | _rl_executing_macro = macro_list->string; |
| 159 | executing_macro_index = macro_list->sindex; |
| 160 | macro_list = macro_list->next; |
| 161 | free (macro); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | /* Add a character to the macro being built. */ |
| 166 | void |
| 167 | _rl_add_macro_char (c) |
| 168 | int c; |
| 169 | { |
| 170 | if (current_macro_index + 1 >= current_macro_size) |
| 171 | { |
| 172 | if (current_macro == 0) |
| 173 | current_macro = xmalloc (current_macro_size = 25); |
| 174 | else |
| 175 | current_macro = xrealloc (current_macro, current_macro_size += 25); |
| 176 | } |
| 177 | |
| 178 | current_macro[current_macro_index++] = c; |
| 179 | current_macro[current_macro_index] = '\0'; |
| 180 | } |
| 181 | |
| 182 | void |
| 183 | _rl_kill_kbd_macro () |
| 184 | { |
| 185 | if (current_macro) |
| 186 | { |
| 187 | free (current_macro); |
| 188 | current_macro = (char *) NULL; |
| 189 | } |
| 190 | current_macro_size = current_macro_index = 0; |
| 191 | |
| 192 | if (_rl_executing_macro) |
| 193 | { |
| 194 | free (_rl_executing_macro); |
| 195 | _rl_executing_macro = (char *) NULL; |
| 196 | } |
| 197 | executing_macro_index = 0; |
| 198 | |
| 199 | _rl_defining_kbd_macro = 0; |
| 200 | } |
| 201 | |
| 202 | /* Begin defining a keyboard macro. |
| 203 | Keystrokes are recorded as they are executed. |
| 204 | End the definition with rl_end_kbd_macro (). |
| 205 | If a numeric argument was explicitly typed, then append this |
| 206 | definition to the end of the existing macro, and start by |
| 207 | re-executing the existing macro. */ |
| 208 | int |
| 209 | rl_start_kbd_macro (ignore1, ignore2) |
| 210 | int ignore1, ignore2; |
| 211 | { |
| 212 | if (_rl_defining_kbd_macro) |
| 213 | { |
| 214 | _rl_abort_internal (); |
| 215 | return -1; |
| 216 | } |
| 217 | |
| 218 | if (rl_explicit_arg) |
| 219 | { |
| 220 | if (current_macro) |
| 221 | _rl_with_macro_input (savestring (current_macro)); |
| 222 | } |
| 223 | else |
| 224 | current_macro_index = 0; |
| 225 | |
| 226 | _rl_defining_kbd_macro = 1; |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | /* Stop defining a keyboard macro. |
| 231 | A numeric argument says to execute the macro right now, |
| 232 | that many times, counting the definition as the first time. */ |
| 233 | int |
| 234 | rl_end_kbd_macro (count, ignore) |
| 235 | int count, ignore; |
| 236 | { |
| 237 | if (_rl_defining_kbd_macro == 0) |
| 238 | { |
| 239 | _rl_abort_internal (); |
| 240 | return -1; |
| 241 | } |
| 242 | |
| 243 | current_macro_index -= rl_key_sequence_length - 1; |
| 244 | current_macro[current_macro_index] = '\0'; |
| 245 | |
| 246 | _rl_defining_kbd_macro = 0; |
| 247 | |
| 248 | return (rl_call_last_kbd_macro (--count, 0)); |
| 249 | } |
| 250 | |
| 251 | /* Execute the most recently defined keyboard macro. |
| 252 | COUNT says how many times to execute it. */ |
| 253 | int |
| 254 | rl_call_last_kbd_macro (count, ignore) |
| 255 | int count, ignore; |
| 256 | { |
| 257 | if (current_macro == 0) |
| 258 | _rl_abort_internal (); |
| 259 | |
| 260 | if (_rl_defining_kbd_macro) |
| 261 | { |
| 262 | ding (); /* no recursive macros */ |
| 263 | current_macro[--current_macro_index] = '\0'; /* erase this char */ |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | while (count--) |
| 268 | _rl_with_macro_input (savestring (current_macro)); |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | void |
| 273 | rl_push_macro_input (macro) |
| 274 | char *macro; |
| 275 | { |
| 276 | _rl_with_macro_input (macro); |
| 277 | } |