File: util.c

package info (click to toggle)
gdb 7.12-6
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 216,152 kB
  • ctags: 304,881
  • sloc: ansic: 2,141,328; asm: 331,662; exp: 133,348; makefile: 57,698; sh: 23,586; yacc: 14,054; cpp: 12,262; perl: 5,300; python: 4,685; ada: 4,343; xml: 3,670; pascal: 3,120; lisp: 1,516; cs: 879; lex: 624; f90: 457; sed: 228; awk: 142; objc: 134; java: 73; fortran: 43
file content (526 lines) | stat: -rw-r--r-- 10,765 bytes parent folder | download | duplicates (10)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
/* util.c -- readline utility functions */

/* Copyright (C) 1987-2010 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>
#include <fcntl.h>
#include "posixjmp.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>
#include <ctype.h>

/* System-specific feature definitions and include files. */
#include "rldefs.h"
#include "rlmbutil.h"

#if defined (TIOCSTAT_IN_SYS_IOCTL)
#  include <sys/ioctl.h>
#endif /* TIOCSTAT_IN_SYS_IOCTL */

/* Some standard library routines. */
#include "readline.h"

#include "rlprivate.h"
#include "xmalloc.h"

/* **************************************************************** */
/*								    */
/*			Utility Functions			    */
/*								    */
/* **************************************************************** */

/* Return 0 if C is not a member of the class of characters that belong
   in words, or 1 if it is. */

int _rl_allow_pathname_alphabetic_chars = 0;
static const char * const pathname_alphabetic_chars = "/-_=~.#$";

int
rl_alphabetic (c)
     int c;
{
  if (ALPHABETIC (c))
    return (1);

  return (_rl_allow_pathname_alphabetic_chars &&
	    strchr (pathname_alphabetic_chars, c) != NULL);
}

#if defined (HANDLE_MULTIBYTE)
int
_rl_walphabetic (wchar_t wc)
{
  int c;

  if (iswalnum (wc))
    return (1);     

  c = wc & 0177;
  return (_rl_allow_pathname_alphabetic_chars &&
	    strchr (pathname_alphabetic_chars, c) != NULL);
}
#endif

/* How to abort things. */
int
_rl_abort_internal ()
{
  rl_ding ();
  rl_clear_message ();
  _rl_reset_argument ();
  rl_clear_pending_input ();

  RL_UNSETSTATE (RL_STATE_MACRODEF);
  while (rl_executing_macro)
    _rl_pop_executing_macro ();

  rl_last_func = (rl_command_func_t *)NULL;
  longjmp (_rl_top_level, 1);
  return (0);
}

int
rl_abort (count, key)
     int count, key;
{
  return (_rl_abort_internal ());
}

int
_rl_null_function (count, key)
     int count, key;
{
  return 0;
}

int
rl_tty_status (count, key)
     int count, key;
{
#if defined (TIOCSTAT)
  ioctl (1, TIOCSTAT, (char *)0);
  rl_refresh_line (count, key);
#else
  rl_ding ();
#endif
  return 0;
}

/* Return a copy of the string between FROM and TO.
   FROM is inclusive, TO is not. */
char *
rl_copy_text (from, to)
     int from, to;
{
  register int length;
  char *copy;

  /* Fix it if the caller is confused. */
  if (from > to)
    SWAP (from, to);

  length = to - from;
  copy = (char *)xmalloc (1 + length);
  strncpy (copy, rl_line_buffer + from, length);
  copy[length] = '\0';
  return (copy);
}

/* Increase the size of RL_LINE_BUFFER until it has enough space to hold
   LEN characters. */
void
rl_extend_line_buffer (len)
     int len;
{
  while (len >= rl_line_buffer_len)
    {
      rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
      rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len);
    }

  _rl_set_the_line ();
}


/* A function for simple tilde expansion. */
int
rl_tilde_expand (ignore, key)
     int ignore, key;
{
  register int start, end;
  char *homedir, *temp;
  int len;

  end = rl_point;
  start = end - 1;

  if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
    {
      homedir = tilde_expand ("~");
      _rl_replace_text (homedir, start, end);
      xfree (homedir);
      return (0);
    }
  else if (rl_line_buffer[start] != '~')
    {
      for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--)
        ;
      start++;
    }

  end = start;
  do
    end++;
  while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end);

  if (whitespace (rl_line_buffer[end]) || end >= rl_end)
    end--;

  /* If the first character of the current word is a tilde, perform
     tilde expansion and insert the result.  If not a tilde, do
     nothing. */
  if (rl_line_buffer[start] == '~')
    {
      len = end - start + 1;
      temp = (char *)xmalloc (len + 1);
      strncpy (temp, rl_line_buffer + start, len);
      temp[len] = '\0';
      homedir = tilde_expand (temp);
      xfree (temp);

      _rl_replace_text (homedir, start, end);
      xfree (homedir);
    }

  return (0);
}

#if defined (USE_VARARGS)
void
#if defined (PREFER_STDARG)
_rl_ttymsg (const char *format, ...)
#else
_rl_ttymsg (va_alist)
     va_dcl
#endif
{
  va_list args;
#if defined (PREFER_VARARGS)
  char *format;
#endif

#if defined (PREFER_STDARG)
  va_start (args, format);
#else
  va_start (args);
  format = va_arg (args, char *);
#endif

  fprintf (stderr, "readline: ");
  vfprintf (stderr, format, args);
  fprintf (stderr, "\n");
  fflush (stderr);

  va_end (args);

  rl_forced_update_display ();
}

void
#if defined (PREFER_STDARG)
_rl_errmsg (const char *format, ...)
#else
_rl_errmsg (va_alist)
     va_dcl
#endif
{
  va_list args;
#if defined (PREFER_VARARGS)
  char *format;
#endif

#if defined (PREFER_STDARG)
  va_start (args, format);
#else
  va_start (args);
  format = va_arg (args, char *);
#endif

  fprintf (stderr, "readline: ");
  vfprintf (stderr, format, args);
  fprintf (stderr, "\n");
  fflush (stderr);

  va_end (args);
}

#else /* !USE_VARARGS */
void
_rl_ttymsg (format, arg1, arg2)
     char *format;
{
  fprintf (stderr, "readline: ");
  fprintf (stderr, format, arg1, arg2);
  fprintf (stderr, "\n");

  rl_forced_update_display ();
}

void
_rl_errmsg (format, arg1, arg2)
     char *format;
{
  fprintf (stderr, "readline: ");
  fprintf (stderr, format, arg1, arg2);
  fprintf (stderr, "\n");
}
#endif /* !USE_VARARGS */

/* **************************************************************** */
/*								    */
/*			String Utility Functions		    */
/*								    */
/* **************************************************************** */

/* Determine if s2 occurs in s1.  If so, return a pointer to the
   match in s1.  The compare is case insensitive. */
char *
_rl_strindex (s1, s2)
     register const char *s1, *s2;
{
  register int i, l, len;

  for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
    if (_rl_strnicmp (s1 + i, s2, l) == 0)
      return ((char *) (s1 + i));
  return ((char *)NULL);
}

#ifndef HAVE_STRPBRK
/* Find the first occurrence in STRING1 of any character from STRING2.
   Return a pointer to the character in STRING1. */
char *
_rl_strpbrk (string1, string2)
     const char *string1, *string2;
{
  register const char *scan;
#if defined (HANDLE_MULTIBYTE)
  mbstate_t ps;
  register int i, v;

  memset (&ps, 0, sizeof (mbstate_t));
#endif

  for (; *string1; string1++)
    {
      for (scan = string2; *scan; scan++)
	{
	  if (*string1 == *scan)
	    return ((char *)string1);
	}
#if defined (HANDLE_MULTIBYTE)
      if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
	{
	  v = _rl_get_char_len (string1, &ps);
	  if (v > 1)
	    string1 += v - 1;	/* -1 to account for auto-increment in loop */
	}
#endif
    }
  return ((char *)NULL);
}
#endif

#if !defined (HAVE_STRCASECMP)
/* Compare at most COUNT characters from string1 to string2.  Case
   doesn't matter (strncasecmp). */
int
_rl_strnicmp (string1, string2, count)
     char *string1, *string2;
     int count;
{
  register char *s1, *s2;
  int d;

  if (count <= 0 || (string1 == string2))
    return 0;

  s1 = string1;
  s2 = string2;
  do
    {
      d = _rl_to_lower (*s1) - _rl_to_lower (*s2);	/* XXX - cast to unsigned char? */
      if (d != 0)
	return d;
      if (*s1++ == '\0')
        break;
      s2++;
    }
  while (--count != 0);

  return (0);
}

/* strcmp (), but caseless (strcasecmp). */
int
_rl_stricmp (string1, string2)
     char *string1, *string2;
{
  register char *s1, *s2;
  int d;

  s1 = string1;
  s2 = string2;

  if (s1 == s2)
    return 0;

  while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0)
    {
      if (*s1++ == '\0')
        return 0;
      s2++;
    }

  return (d);
}
#endif /* !HAVE_STRCASECMP */

/* Stupid comparison routine for qsort () ing strings. */
int
_rl_qsort_string_compare (s1, s2)
  char **s1, **s2;
{
#if defined (HAVE_STRCOLL)
  return (strcoll (*s1, *s2));
#else
  int result;

  result = **s1 - **s2;
  if (result == 0)
    result = strcmp (*s1, *s2);

  return result;
#endif
}

/* Function equivalents for the macros defined in chardefs.h. */
#define FUNCTION_FOR_MACRO(f)	int (f) (c) int c; { return f (c); }

FUNCTION_FOR_MACRO (_rl_digit_p)
FUNCTION_FOR_MACRO (_rl_digit_value)
FUNCTION_FOR_MACRO (_rl_lowercase_p)
FUNCTION_FOR_MACRO (_rl_pure_alphabetic)
FUNCTION_FOR_MACRO (_rl_to_lower)
FUNCTION_FOR_MACRO (_rl_to_upper)
FUNCTION_FOR_MACRO (_rl_uppercase_p)

/* A convenience function, to force memory deallocation to be performed
   by readline.  DLLs on Windows apparently require this. */
void
rl_free (mem)
     void *mem;
{
  if (mem)
    free (mem);
}

/* Backwards compatibility, now that savestring has been removed from
   all `public' readline header files. */
#undef _rl_savestring
char *
_rl_savestring (s)
     const char *s;
{
  return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s)));
}

#if defined (USE_VARARGS)
static FILE *_rl_tracefp;

void
#if defined (PREFER_STDARG)
_rl_trace (const char *format, ...)
#else
_rl_trace (va_alist)
     va_dcl
#endif
{
  va_list args;
#if defined (PREFER_VARARGS)
  char *format;
#endif

#if defined (PREFER_STDARG)
  va_start (args, format);
#else
  va_start (args);
  format = va_arg (args, char *);
#endif

  if (_rl_tracefp == 0)
    _rl_tropen ();
  vfprintf (_rl_tracefp, format, args);
  fprintf (_rl_tracefp, "\n");
  fflush (_rl_tracefp);

  va_end (args);
}

int
_rl_tropen ()
{
  char fnbuf[128];

  if (_rl_tracefp)
    fclose (_rl_tracefp);
  sprintf (fnbuf, "/var/tmp/rltrace.%ld", getpid());
  unlink(fnbuf);
  _rl_tracefp = fopen (fnbuf, "w+");
  return _rl_tracefp != 0;
}

int
_rl_trclose ()
{
  int r;

  r = fclose (_rl_tracefp);
  _rl_tracefp = 0;
  return r;
}

#endif