1: /* macro.c -- keyboard macros for readline. */
2:
3: /* Copyright (C) 1994-2009 Free Software Foundation, Inc.
4:
5: This file is part of the GNU Readline Library (Readline), a library
6: for reading lines of text with interactive input and history editing.
7:
8: Readline is free software: you can redistribute it and/or modify
9: it under the terms of the GNU General Public License as published by
10: the Free Software Foundation, either version 3 of the License, or
11: (at your option) any later version.
12:
13: Readline is distributed in the hope that it will be useful,
14: but WITHOUT ANY WARRANTY; without even the implied warranty of
15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: GNU General Public License for more details.
17:
18: You should have received a copy of the GNU General Public License
19: along with Readline. If not, see <http://www.gnu.org/licenses/>.
20: */
21:
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: #include "rlprivate.h"
50: #include "xmalloc.h"
51:
52: /* **************************************************************** */
53: /* */
54: /* Hacking Keyboard Macros */
55: /* */
56: /* **************************************************************** */
57:
58: /* The currently executing macro string. If this is non-zero,
59: then it is a malloc ()'ed string where input is coming from. */
60: char *rl_executing_macro = (char *)NULL;
61:
62: /* The offset in the above string to the next character to be read. */
63: static int executing_macro_index;
64:
65: /* The current macro string being built. Characters get stuffed
66: in here by add_macro_char (). */
67: static char *current_macro = (char *)NULL;
68:
69: /* The size of the buffer allocated to current_macro. */
70: static int current_macro_size;
71:
72: /* The index at which characters are being added to current_macro. */
73: static int current_macro_index;
74:
75: /* A structure used to save nested macro strings.
76: It is a linked list of string/index for each saved macro. */
77: struct saved_macro {
78: struct saved_macro *next;
79: char *string;
80: int sindex;
81: };
82:
83: /* The list of saved macros. */
84: static struct saved_macro *macro_list = (struct saved_macro *)NULL;
85:
86: /* Set up to read subsequent input from STRING.
87: STRING is free ()'ed when we are done with it. */
88: void
89: _rl_with_macro_input (string)
90: char *string;
91: {
92: _rl_push_executing_macro ();
93: rl_executing_macro = string;
94: executing_macro_index = 0;
95: RL_SETSTATE(RL_STATE_MACROINPUT);
96: }
97:
98: /* Return the next character available from a macro, or 0 if
99: there are no macro characters. */
100: int
101: _rl_next_macro_key ()
102: {
103: int c;
104:
105: if (rl_executing_macro == 0)
106: return (0);
107:
108: if (rl_executing_macro[executing_macro_index] == 0)
109: {
110: _rl_pop_executing_macro ();
111: return (_rl_next_macro_key ());
112: }
113:
114: #if defined (READLINE_CALLBACKS)
115: c = rl_executing_macro[executing_macro_index++];
116: if (RL_ISSTATE (RL_STATE_CALLBACK) && RL_ISSTATE (RL_STATE_READCMD|RL_STATE_MOREINPUT) && rl_executing_macro[executing_macro_index] == 0)
117: _rl_pop_executing_macro ();
118: return c;
119: #else
120: return (rl_executing_macro[executing_macro_index++]);
121: #endif
122: }
123:
124: int
125: _rl_prev_macro_key ()
126: {
127: if (rl_executing_macro == 0)
128: return (0);
129:
130: if (executing_macro_index == 0)
131: return (0);
132:
133: executing_macro_index--;
134: return (rl_executing_macro[executing_macro_index]);
135: }
136:
137: /* Save the currently executing macro on a stack of saved macros. */
138: void
139: _rl_push_executing_macro ()
140: {
141: struct saved_macro *saver;
142:
143: saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro));
144: saver->next = macro_list;
145: saver->sindex = executing_macro_index;
146: saver->string = rl_executing_macro;
147:
148: macro_list = saver;
149: }
150:
151: /* Discard the current macro, replacing it with the one
152: on the top of the stack of saved macros. */
153: void
154: _rl_pop_executing_macro ()
155: {
156: struct saved_macro *macro;
157:
158: FREE (rl_executing_macro);
159: rl_executing_macro = (char *)NULL;
160: executing_macro_index = 0;
161:
162: if (macro_list)
163: {
164: macro = macro_list;
165: rl_executing_macro = macro_list->string;
166: executing_macro_index = macro_list->sindex;
167: macro_list = macro_list->next;
168: xfree (macro);
169: }
170:
171: if (rl_executing_macro == 0)
172: RL_UNSETSTATE(RL_STATE_MACROINPUT);
173: }
174:
175: /* Add a character to the macro being built. */
176: void
177: _rl_add_macro_char (c)
178: int c;
179: {
180: if (current_macro_index + 1 >= current_macro_size)
181: {
182: if (current_macro == 0)
183: current_macro = (char *)xmalloc (current_macro_size = 25);
184: else
185: current_macro = (char *)xrealloc (current_macro, current_macro_size += 25);
186: }
187:
188: current_macro[current_macro_index++] = c;
189: current_macro[current_macro_index] = '\0';
190: }
191:
192: void
193: _rl_kill_kbd_macro ()
194: {
195: if (current_macro)
196: {
197: xfree (current_macro);
198: current_macro = (char *) NULL;
199: }
200: current_macro_size = current_macro_index = 0;
201:
202: FREE (rl_executing_macro);
203: rl_executing_macro = (char *) NULL;
204: executing_macro_index = 0;
205:
206: RL_UNSETSTATE(RL_STATE_MACRODEF);
207: }
208:
209: /* Begin defining a keyboard macro.
210: Keystrokes are recorded as they are executed.
211: End the definition with rl_end_kbd_macro ().
212: If a numeric argument was explicitly typed, then append this
213: definition to the end of the existing macro, and start by
214: re-executing the existing macro. */
215: int
216: rl_start_kbd_macro (ignore1, ignore2)
217: int ignore1, ignore2;
218: {
219: if (RL_ISSTATE (RL_STATE_MACRODEF))
220: {
221: _rl_abort_internal ();
222: return -1;
223: }
224:
225: if (rl_explicit_arg)
226: {
227: if (current_macro)
228: _rl_with_macro_input (savestring (current_macro));
229: }
230: else
231: current_macro_index = 0;
232:
233: RL_SETSTATE(RL_STATE_MACRODEF);
234: return 0;
235: }
236:
237: /* Stop defining a keyboard macro.
238: A numeric argument says to execute the macro right now,
239: that many times, counting the definition as the first time. */
240: int
241: rl_end_kbd_macro (count, ignore)
242: int count, ignore;
243: {
244: if (RL_ISSTATE (RL_STATE_MACRODEF) == 0)
245: {
246: _rl_abort_internal ();
247: return -1;
248: }
249:
250: current_macro_index -= rl_key_sequence_length;
251: current_macro[current_macro_index] = '\0';
252:
253: RL_UNSETSTATE(RL_STATE_MACRODEF);
254:
255: return (rl_call_last_kbd_macro (--count, 0));
256: }
257:
258: /* Execute the most recently defined keyboard macro.
259: COUNT says how many times to execute it. */
260: int
261: rl_call_last_kbd_macro (count, ignore)
262: int count, ignore;
263: {
264: if (current_macro == 0)
265: _rl_abort_internal ();
266:
267: if (RL_ISSTATE (RL_STATE_MACRODEF))
268: {
269: rl_ding (); /* no recursive macros */
270: current_macro[--current_macro_index] = '\0'; /* erase this char */
271: return 0;
272: }
273:
274: while (count--)
275: _rl_with_macro_input (savestring (current_macro));
276: return 0;
277: }
278:
279: int
280: rl_print_last_kbd_macro (count, ignore)
281: int count, ignore;
282: {
283: char *m;
284:
285: if (current_macro == 0)
286: {
287: rl_ding ();
288: return 0;
289: }
290: m = _rl_untranslate_macro_value (current_macro, 1);
291: rl_crlf ();
292: printf ("%s", m);
293: fflush (stdout);
294: rl_crlf ();
295: FREE (m);
296: rl_forced_update_display ();
297: rl_display_fixed = 1;
298:
299: return 0;
300: }
301:
302: void
303: rl_push_macro_input (macro)
304: char *macro;
305: {
306: _rl_with_macro_input (macro);
307: }
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