D-Bus  1.14.6
dbus-string.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-string.c String utility class (internal to D-Bus implementation)
3  *
4  * Copyright 2002-2007 Red Hat, Inc.
5  * Copyright 2003 CodeFactory AB
6  * Copyright 2003 Mark McLoughlin
7  * Copyright 2004 Michael Meeks
8  * Copyright 2006-2014 Ralf Habacker <ralf.habacker@freenet.de>
9  * Copyright 2006-2018 Collabora Ltd.
10  * Copyright 2007 Allison Lortie
11  * Copyright 2011 Roberto Guido
12  * Copyright 2013 Chengwei Yang / Intel
13  *
14  * Licensed under the Academic Free License version 2.1
15  *
16  * This program is free software; you can redistribute it and/or modify
17  * it under the terms of the GNU General Public License as published by
18  * the Free Software Foundation; either version 2 of the License, or
19  * (at your option) any later version.
20  *
21  * This program is distributed in the hope that it will be useful,
22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24  * GNU General Public License for more details.
25  *
26  * You should have received a copy of the GNU General Public License
27  * along with this program; if not, write to the Free Software
28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29  *
30  */
31 
32 #include <config.h>
33 #include "dbus-internals.h"
34 #include "dbus-string.h"
35 /* we allow a system header here, for speed/convenience */
36 #include <string.h>
37 /* for vsnprintf */
38 #include <stdio.h>
39 #define DBUS_CAN_USE_DBUS_STRING_PRIVATE 1
40 #include "dbus-string-private.h"
41 #include "dbus-marshal-basic.h" /* probably should be removed by moving the usage of DBUS_TYPE
42  * into the marshaling-related files
43  */
44 /* for DBUS_VA_COPY */
45 #include "dbus-sysdeps.h"
46 
85 static void
86 fixup_alignment (DBusRealString *real)
87 {
88  unsigned char *aligned;
89  unsigned char *real_block;
90  unsigned int old_align_offset;
91 
92  /* we have to have extra space in real->allocated for the align offset and nul byte */
93  _dbus_assert (real->len <= real->allocated - _DBUS_STRING_ALLOCATION_PADDING);
94 
95  old_align_offset = real->align_offset;
96  real_block = real->str - old_align_offset;
97 
98  aligned = _DBUS_ALIGN_ADDRESS (real_block, 8);
99 
100  real->align_offset = aligned - real_block;
101  real->str = aligned;
102 
103  if (old_align_offset != real->align_offset)
104  {
105  /* Here comes the suck */
106  memmove (real_block + real->align_offset,
107  real_block + old_align_offset,
108  real->len + 1);
109  }
110 
111  _dbus_assert (real->align_offset < 8);
112  _dbus_assert (_DBUS_ALIGN_ADDRESS (real->str, 8) == real->str);
113 }
114 
115 static void
116 undo_alignment (DBusRealString *real)
117 {
118  if (real->align_offset != 0)
119  {
120  memmove (real->str - real->align_offset,
121  real->str,
122  real->len + 1);
123 
124  real->str = real->str - real->align_offset;
125  real->align_offset = 0;
126  }
127 }
128 
140  int allocate_size)
141 {
142  DBusRealString *real;
143 
144  _DBUS_STATIC_ASSERT (sizeof (DBusString) == sizeof (DBusRealString));
145 
146  _dbus_assert (str != NULL);
147 
148  real = (DBusRealString*) str;
149 
150  /* It's very important not to touch anything
151  * other than real->str if we're going to fail,
152  * since we also use this function to reset
153  * an existing string, e.g. in _dbus_string_steal_data()
154  */
155 
156  real->str = dbus_malloc (_DBUS_STRING_ALLOCATION_PADDING + allocate_size);
157  if (real->str == NULL)
158  return FALSE;
159 
160  real->allocated = _DBUS_STRING_ALLOCATION_PADDING + allocate_size;
161  real->len = 0;
162  real->str[real->len] = '\0';
163 
164  real->constant = FALSE;
165  real->locked = FALSE;
166  real->valid = TRUE;
167  real->align_offset = 0;
168 
169  fixup_alignment (real);
170 
171  return TRUE;
172 }
173 
183 {
184  return _dbus_string_init_preallocated (str, 0);
185 }
186 
196 void
198  const char *value)
199 {
200  _dbus_assert (value != NULL);
201 
202  _dbus_string_init_const_len (str, value,
203  strlen (value));
204 }
205 
216 void
218  const char *value,
219  int len)
220 {
221  DBusRealString *real;
222 
223  _dbus_assert (str != NULL);
224  _dbus_assert (len == 0 || value != NULL);
226  _dbus_assert (len >= 0);
227 
228  real = (DBusRealString*) str;
229 
230  real->str = (unsigned char*) value;
231  real->len = len;
232  real->allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING; /* a lie, just to avoid special-case assertions... */
233  real->constant = TRUE;
234  real->locked = TRUE;
235  real->valid = TRUE;
236  real->align_offset = 0;
237 
238  /* We don't require const strings to be 8-byte aligned as the
239  * memory is coming from elsewhere.
240  */
241 }
242 
255  const DBusString *from)
256 {
257  if (!_dbus_string_init (str))
258  return FALSE;
259  if (!_dbus_string_append (str, _dbus_string_get_const_data (from)))
260  {
261  _dbus_string_free (str);
262  return FALSE;
263  }
264  return TRUE;
265 }
266 
277 void
279 {
280  DBusRealString *real = (DBusRealString*) str;
281  /* DBusRealString and DBusString have the same members in the same order,
282  * just differently-named */
283  DBusRealString invalid = _DBUS_STRING_INIT_INVALID;
284 
285  /* Allow for the _DBUS_STRING_INIT_INVALID case */
286  if (real->str == NULL && real->len == 0 && real->allocated == 0 &&
287  !real->constant && !real->locked && !real->valid &&
288  real->align_offset == 0)
289  return;
290 
292 
293  if (real->constant)
294  goto wipe;
295 
296  /* so it's safe if @p str returned by a failed
297  * _dbus_string_init call
298  * Bug: https://bugs.freedesktop.org/show_bug.cgi?id=65959
299  */
300  if (real->str == NULL)
301  goto wipe;
302 
303  dbus_free (real->str - real->align_offset);
304 
305 wipe:
306  *real = invalid;
307  real->valid = FALSE;
308 }
309 
310 static dbus_bool_t
311 compact (DBusRealString *real,
312  int max_waste)
313 {
314  unsigned char *new_str;
315  int new_allocated;
316  int waste;
317 
318  waste = real->allocated - (real->len + _DBUS_STRING_ALLOCATION_PADDING);
319 
320  if (waste <= max_waste)
321  return TRUE;
322 
323  new_allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
324 
325  new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
326  if (_DBUS_UNLIKELY (new_str == NULL))
327  return FALSE;
328 
329  real->str = new_str + real->align_offset;
330  real->allocated = new_allocated;
331  fixup_alignment (real);
332 
333  return TRUE;
334 }
335 
336 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
337 /* Not using this feature at the moment,
338  * so marked DBUS_ENABLE_EMBEDDED_TESTS-only
339  */
349 void
350 _dbus_string_lock (DBusString *str)
351 {
352  DBUS_LOCKED_STRING_PREAMBLE (str); /* can lock multiple times */
353 
354  real->locked = TRUE;
355 
356  /* Try to realloc to avoid excess memory usage, since
357  * we know we won't change the string further
358  */
359 #define MAX_WASTE 48
360  compact (real, MAX_WASTE);
361 }
362 #endif /* DBUS_ENABLE_EMBEDDED_TESTS */
363 
364 static dbus_bool_t
365 reallocate_for_length (DBusRealString *real,
366  int new_length)
367 {
368  int new_allocated;
369  unsigned char *new_str;
370 
371  /* at least double our old allocation to avoid O(n), avoiding
372  * overflow
373  */
374  if (real->allocated > (_DBUS_STRING_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING) / 2)
375  new_allocated = _DBUS_STRING_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING;
376  else
377  new_allocated = real->allocated * 2;
378 
379  /* if you change the code just above here, run the tests without
380  * the following assert-only hack before you commit
381  */
382  /* This is keyed off asserts in addition to tests so when you
383  * disable asserts to profile, you don't get this destroyer
384  * of profiles.
385  */
386 #if defined (DBUS_ENABLE_EMBEDDED_TESTS) && !defined (DBUS_DISABLE_ASSERT)
387  new_allocated = 0; /* ensure a realloc every time so that we go
388  * through all malloc failure codepaths
389  */
390 #endif
391 
392  /* But be sure we always alloc at least space for the new length */
393  new_allocated = MAX (new_allocated,
394  new_length + _DBUS_STRING_ALLOCATION_PADDING);
395 
396  _dbus_assert (new_allocated >= real->allocated); /* code relies on this */
397  new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
398  if (_DBUS_UNLIKELY (new_str == NULL))
399  return FALSE;
400 
401  real->str = new_str + real->align_offset;
402  real->allocated = new_allocated;
403  fixup_alignment (real);
404 
405  return TRUE;
406 }
407 
421  int max_waste)
422 {
423  DBUS_STRING_PREAMBLE (str);
424 
425  return compact (real, max_waste);
426 }
427 
428 static dbus_bool_t
429 set_length (DBusRealString *real,
430  int new_length)
431 {
432  /* Note, we are setting the length not including nul termination */
433 
434  /* exceeding max length is the same as failure to allocate memory */
435  if (_DBUS_UNLIKELY (new_length > _DBUS_STRING_MAX_LENGTH))
436  return FALSE;
437  else if (new_length > (real->allocated - _DBUS_STRING_ALLOCATION_PADDING) &&
438  _DBUS_UNLIKELY (!reallocate_for_length (real, new_length)))
439  return FALSE;
440  else
441  {
442  real->len = new_length;
443  real->str[new_length] = '\0';
444  return TRUE;
445  }
446 }
447 
448 static dbus_bool_t
449 open_gap (int len,
450  DBusRealString *dest,
451  int insert_at)
452 {
453  if (len == 0)
454  return TRUE;
455 
456  if (len > _DBUS_STRING_MAX_LENGTH - dest->len)
457  return FALSE; /* detected overflow of dest->len + len below */
458 
459  if (!set_length (dest, dest->len + len))
460  return FALSE;
461 
462  memmove (dest->str + insert_at + len,
463  dest->str + insert_at,
464  dest->len - len - insert_at);
465 
466  return TRUE;
467 }
468 
469 #ifndef _dbus_string_get_data
470 
481 char*
482 _dbus_string_get_data (DBusString *str)
483 {
484  DBUS_STRING_PREAMBLE (str);
485 
486  return (char*) real->str;
487 }
488 #endif /* _dbus_string_get_data */
489 
490 /* only do the function if we don't have the macro */
491 #ifndef _dbus_string_get_const_data
492 
498 const char*
499 _dbus_string_get_const_data (const DBusString *str)
500 {
502 
503  return (const char*) real->str;
504 }
505 #endif /* _dbus_string_get_const_data */
506 
520 char*
522  int start,
523  int len)
524 {
525  DBUS_STRING_PREAMBLE (str);
526  _dbus_assert (start >= 0);
527  _dbus_assert (len >= 0);
528  _dbus_assert (start <= real->len);
529  _dbus_assert (len <= real->len - start);
530 
531  return (char*) real->str + start;
532 }
533 
534 /* only do the function if we don't have the macro */
535 #ifndef _dbus_string_get_const_data_len
536 
544 const char*
545 _dbus_string_get_const_data_len (const DBusString *str,
546  int start,
547  int len)
548 {
550  _dbus_assert (start >= 0);
551  _dbus_assert (len >= 0);
552  _dbus_assert (start <= real->len);
553  _dbus_assert (len <= real->len - start);
554 
555  return (const char*) real->str + start;
556 }
557 #endif /* _dbus_string_get_const_data_len */
558 
559 /* only do the function if we don't have the macro */
560 #ifndef _dbus_string_set_byte
561 
568 void
569 _dbus_string_set_byte (DBusString *str,
570  int i,
571  unsigned char byte)
572 {
573  DBUS_STRING_PREAMBLE (str);
574  _dbus_assert (i < real->len);
575  _dbus_assert (i >= 0);
576 
577  real->str[i] = byte;
578 }
579 #endif /* _dbus_string_set_byte */
580 
581 /* only have the function if we didn't create a macro */
582 #ifndef _dbus_string_get_byte
583 
592 unsigned char
593 _dbus_string_get_byte (const DBusString *str,
594  int start)
595 {
597  _dbus_assert (start <= real->len);
598  _dbus_assert (start >= 0);
599 
600  return real->str[start];
601 }
602 #endif /* _dbus_string_get_byte */
603 
616  int i,
617  int n_bytes,
618  unsigned char byte)
619 {
620  DBUS_STRING_PREAMBLE (str);
621  _dbus_assert (i <= real->len);
622  _dbus_assert (i >= 0);
623  _dbus_assert (n_bytes >= 0);
624 
625  if (n_bytes == 0)
626  return TRUE;
627 
628  if (!open_gap (n_bytes, real, i))
629  return FALSE;
630 
631  memset (real->str + i, byte, n_bytes);
632 
633  return TRUE;
634 }
635 
646  int i,
647  unsigned char byte)
648 {
649  DBUS_STRING_PREAMBLE (str);
650  _dbus_assert (i <= real->len);
651  _dbus_assert (i >= 0);
652 
653  if (!open_gap (1, real, i))
654  return FALSE;
655 
656  real->str[i] = byte;
657 
658  return TRUE;
659 }
660 
673  char **data_return)
674 {
675  DBUS_STRING_PREAMBLE (str);
676  _dbus_assert (data_return != NULL);
677 
678  undo_alignment (real);
679 
680  *data_return = (char*) real->str;
681 
682  /* reset the string */
683  if (!_dbus_string_init (str))
684  {
685  /* hrm, put it back then */
686  real->str = (unsigned char*) *data_return;
687  *data_return = NULL;
688  fixup_alignment (real);
689  return FALSE;
690  }
691 
692  return TRUE;
693 }
694 
704  char **data_return)
705 {
707  _dbus_assert (data_return != NULL);
708 
709  *data_return = dbus_malloc (real->len + 1);
710  if (*data_return == NULL)
711  return FALSE;
712 
713  memcpy (*data_return, real->str, real->len + 1);
714 
715  return TRUE;
716 }
717 
727 void
729  char *buffer,
730  int avail_len)
731 {
733 
734  _dbus_assert (avail_len >= 0);
735  _dbus_assert (avail_len >= real->len);
736 
737  memcpy (buffer, real->str, real->len);
738 }
739 
749 void
751  char *buffer,
752  int avail_len)
753 {
755 
756  _dbus_assert (avail_len >= 0);
757  _dbus_assert (avail_len > real->len);
758 
759  memcpy (buffer, real->str, real->len+1);
760 }
761 
762 /* Only have the function if we don't have the macro */
763 #ifndef _dbus_string_get_length
764 
769 int
770 _dbus_string_get_length (const DBusString *str)
771 {
773 
774  return real->len;
775 }
776 #endif /* !_dbus_string_get_length */
777 
792  int additional_length)
793 {
794  DBUS_STRING_PREAMBLE (str);
795  _dbus_assert (additional_length >= 0);
796 
797  if (_DBUS_UNLIKELY (additional_length > _DBUS_STRING_MAX_LENGTH - real->len))
798  return FALSE; /* would overflow */
799 
800  return set_length (real,
801  real->len + additional_length);
802 }
803 
810 void
812  int length_to_remove)
813 {
814  DBUS_STRING_PREAMBLE (str);
815  _dbus_assert (length_to_remove >= 0);
816  _dbus_assert (length_to_remove <= real->len);
817 
818  set_length (real,
819  real->len - length_to_remove);
820 }
821 
834  int length)
835 {
836  DBUS_STRING_PREAMBLE (str);
837  _dbus_assert (length >= 0);
838 
839  return set_length (real, length);
840 }
841 
842 static dbus_bool_t
843 align_insert_point_then_open_gap (DBusString *str,
844  int *insert_at_p,
845  int alignment,
846  int gap_size)
847 {
848  unsigned long new_len; /* ulong to avoid _DBUS_ALIGN_VALUE overflow */
849  unsigned long gap_pos;
850  int insert_at;
851  int delta;
852  DBUS_STRING_PREAMBLE (str);
853  _dbus_assert (alignment >= 1);
854  _dbus_assert (alignment <= 8); /* it has to be a bug if > 8 */
855 
856  insert_at = *insert_at_p;
857 
858  _dbus_assert (insert_at <= real->len);
859 
860  gap_pos = _DBUS_ALIGN_VALUE (insert_at, alignment);
861  new_len = real->len + (gap_pos - insert_at) + gap_size;
862 
863  if (_DBUS_UNLIKELY (new_len > (unsigned long) _DBUS_STRING_MAX_LENGTH))
864  return FALSE;
865 
866  delta = new_len - real->len;
867  _dbus_assert (delta >= 0);
868 
869  if (delta == 0) /* only happens if gap_size == 0 and insert_at is aligned already */
870  {
871  _dbus_assert (((unsigned long) *insert_at_p) == gap_pos);
872  return TRUE;
873  }
874 
875  if (_DBUS_UNLIKELY (!open_gap (new_len - real->len,
876  real, insert_at)))
877  return FALSE;
878 
879  /* nul the padding if we had to add any padding */
880  if (gap_size < delta)
881  {
882  memset (&real->str[insert_at], '\0',
883  gap_pos - insert_at);
884  }
885 
886  *insert_at_p = gap_pos;
887 
888  return TRUE;
889 }
890 
891 static dbus_bool_t
892 align_length_then_lengthen (DBusString *str,
893  int alignment,
894  int then_lengthen_by)
895 {
896  int insert_at;
897 
898  insert_at = _dbus_string_get_length (str);
899 
900  return align_insert_point_then_open_gap (str,
901  &insert_at,
902  alignment, then_lengthen_by);
903 }
904 
915  int alignment)
916 {
917  return align_length_then_lengthen (str, alignment, 0);
918 }
919 
931  int extra_bytes)
932 {
933  if (!_dbus_string_lengthen (str, extra_bytes))
934  return FALSE;
935  _dbus_string_shorten (str, extra_bytes);
936 
937  return TRUE;
938 }
939 
940 static dbus_bool_t
941 append (DBusRealString *real,
942  const char *buffer,
943  int buffer_len)
944 {
945  if (buffer_len == 0)
946  return TRUE;
947 
948  if (!_dbus_string_lengthen ((DBusString*)real, buffer_len))
949  return FALSE;
950 
951  memcpy (real->str + (real->len - buffer_len),
952  buffer,
953  buffer_len);
954 
955  return TRUE;
956 }
957 
967  const char *buffer)
968 {
969  unsigned long buffer_len;
970 
971  DBUS_STRING_PREAMBLE (str);
972  _dbus_assert (buffer != NULL);
973 
974  buffer_len = strlen (buffer);
975  if (buffer_len > (unsigned long) _DBUS_STRING_MAX_LENGTH)
976  return FALSE;
977 
978  return append (real, buffer, buffer_len);
979 }
980 
982 #define ASSIGN_2_OCTETS(p, octets) \
983  *((dbus_uint16_t*)(p)) = *((dbus_uint16_t*)(octets));
984 
986 #define ASSIGN_4_OCTETS(p, octets) \
987  *((dbus_uint32_t*)(p)) = *((dbus_uint32_t*)(octets));
988 
990 #define ASSIGN_8_OCTETS(p, octets) \
991  *((dbus_uint64_t*)(p)) = *((dbus_uint64_t*)(octets));
992 
1004  int insert_at,
1005  const unsigned char octets[2])
1006 {
1007  DBUS_STRING_PREAMBLE (str);
1008 
1009  if (!align_insert_point_then_open_gap (str, &insert_at, 2, 2))
1010  return FALSE;
1011 
1012  ASSIGN_2_OCTETS (real->str + insert_at, octets);
1013 
1014  return TRUE;
1015 }
1016 
1028  int insert_at,
1029  const unsigned char octets[4])
1030 {
1031  DBUS_STRING_PREAMBLE (str);
1032 
1033  if (!align_insert_point_then_open_gap (str, &insert_at, 4, 4))
1034  return FALSE;
1035 
1036  ASSIGN_4_OCTETS (real->str + insert_at, octets);
1037 
1038  return TRUE;
1039 }
1040 
1052  int insert_at,
1053  const unsigned char octets[8])
1054 {
1055  DBUS_STRING_PREAMBLE (str);
1056 
1057  if (!align_insert_point_then_open_gap (str, &insert_at, 8, 8))
1058  return FALSE;
1059 
1060  _dbus_assert (_DBUS_ALIGN_VALUE (insert_at, 8) == (unsigned) insert_at);
1061 
1062  ASSIGN_8_OCTETS (real->str + insert_at, octets);
1063 
1064  return TRUE;
1065 }
1066 
1067 
1080  int *insert_at,
1081  int alignment)
1082 {
1083  DBUS_STRING_PREAMBLE (str);
1084 
1085  if (!align_insert_point_then_open_gap (str, insert_at, alignment, 0))
1086  return FALSE;
1087 
1088  _dbus_assert (_DBUS_ALIGN_VALUE (*insert_at, alignment) == (unsigned) *insert_at);
1089 
1090  return TRUE;
1091 }
1092 
1104  const char *format,
1105  va_list args)
1106 {
1107  dbus_bool_t ret = FALSE;
1108  int len;
1109  va_list args_copy;
1110 
1111  DBUS_STRING_PREAMBLE (str);
1112 
1113  DBUS_VA_COPY (args_copy, args);
1114 
1115  /* Measure the message length without terminating nul */
1116  len = _dbus_printf_string_upper_bound (format, args);
1117 
1118  if (len < 0)
1119  goto out;
1120 
1121  if (!_dbus_string_lengthen (str, len))
1122  {
1123  goto out;
1124  }
1125 
1126  vsprintf ((char*) (real->str + (real->len - len)),
1127  format, args_copy);
1128  ret = TRUE;
1129 
1130 out:
1131  va_end (args_copy);
1132 
1133  return ret;
1134 }
1135 
1146  const char *format,
1147  ...)
1148 {
1149  va_list args;
1150  dbus_bool_t retval;
1151 
1152  va_start (args, format);
1153  retval = _dbus_string_append_printf_valist (str, format, args);
1154  va_end (args);
1155 
1156  return retval;
1157 }
1158 
1169  const char *buffer,
1170  int len)
1171 {
1172  DBUS_STRING_PREAMBLE (str);
1173  _dbus_assert (buffer != NULL);
1174  _dbus_assert (len >= 0);
1175 
1176  return append (real, buffer, len);
1177 }
1178 
1189  unsigned char byte)
1190 {
1191  DBUS_STRING_PREAMBLE (str);
1192 
1193  if (!set_length (real, real->len + 1))
1194  return FALSE;
1195 
1196  real->str[real->len-1] = byte;
1197 
1198  return TRUE;
1199 }
1200 
1211 _dbus_string_append_strings (DBusString *str, char **strings, char separator)
1212 {
1213  int i;
1214 
1215  if (strings == NULL)
1216  return TRUE;
1217 
1218  for (i = 0; strings[i]; i++)
1219  {
1220  if (i > 0 && !_dbus_string_append_byte (str, (unsigned char) separator))
1221  return FALSE;
1222 
1223  if (!_dbus_string_append (str, strings[i]))
1224  return FALSE;
1225  }
1226 
1227  return TRUE;
1228 }
1229 
1230 static void
1231 delete (DBusRealString *real,
1232  int start,
1233  int len)
1234 {
1235  if (len == 0)
1236  return;
1237 
1238  memmove (real->str + start, real->str + start + len, real->len - (start + len));
1239  real->len -= len;
1240  real->str[real->len] = '\0';
1241 }
1242 
1252 void
1254  int start,
1255  int len)
1256 {
1257  DBUS_STRING_PREAMBLE (str);
1258  _dbus_assert (start >= 0);
1259  _dbus_assert (len >= 0);
1260  _dbus_assert (start <= real->len);
1261  _dbus_assert (len <= real->len - start);
1262 
1263  delete (real, start, len);
1264 }
1265 
1266 static dbus_bool_t
1267 copy (DBusRealString *source,
1268  int start,
1269  int len,
1270  DBusRealString *dest,
1271  int insert_at)
1272 {
1273  if (len == 0)
1274  return TRUE;
1275 
1276  if (!open_gap (len, dest, insert_at))
1277  return FALSE;
1278 
1279  memmove (dest->str + insert_at,
1280  source->str + start,
1281  len);
1282 
1283  return TRUE;
1284 }
1285 
1295 #define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at) \
1296  DBusRealString *real_source = (DBusRealString*) source; \
1297  DBusRealString *real_dest = (DBusRealString*) dest; \
1298  _dbus_assert ((source) != (dest)); \
1299  DBUS_GENERIC_STRING_PREAMBLE (real_source); \
1300  DBUS_GENERIC_STRING_PREAMBLE (real_dest); \
1301  _dbus_assert (!real_dest->constant); \
1302  _dbus_assert (!real_dest->locked); \
1303  _dbus_assert ((start) >= 0); \
1304  _dbus_assert ((start) <= real_source->len); \
1305  _dbus_assert ((insert_at) >= 0); \
1306  _dbus_assert ((insert_at) <= real_dest->len)
1307 
1320  int start,
1321  DBusString *dest,
1322  int insert_at)
1323 {
1324  DBusRealString *real_source = (DBusRealString*) source;
1325  _dbus_assert (start <= real_source->len);
1326 
1327  return _dbus_string_move_len (source, start,
1328  real_source->len - start,
1329  dest, insert_at);
1330 }
1331 
1344  int start,
1345  DBusString *dest,
1346  int insert_at)
1347 {
1348  DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1349 
1350  return copy (real_source, start,
1351  real_source->len - start,
1352  real_dest,
1353  insert_at);
1354 }
1355 
1369  int start,
1370  int len,
1371  DBusString *dest,
1372  int insert_at)
1373 
1374 {
1375  DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1376  _dbus_assert (len >= 0);
1377  _dbus_assert ((start + len) <= real_source->len);
1378 
1379 
1380  if (len == 0)
1381  {
1382  return TRUE;
1383  }
1384  else if (start == 0 &&
1385  len == real_source->len &&
1386  real_dest->len == 0)
1387  {
1388  /* Short-circuit moving an entire existing string to an empty string
1389  * by just swapping the buffers.
1390  */
1391  /* we assume ->constant doesn't matter as you can't have
1392  * a constant string involved in a move.
1393  */
1394 #define ASSIGN_DATA(a, b) do { \
1395  (a)->str = (b)->str; \
1396  (a)->len = (b)->len; \
1397  (a)->allocated = (b)->allocated; \
1398  (a)->align_offset = (b)->align_offset; \
1399  } while (0)
1400 
1401  DBusRealString tmp;
1402 
1403  ASSIGN_DATA (&tmp, real_source);
1404  ASSIGN_DATA (real_source, real_dest);
1405  ASSIGN_DATA (real_dest, &tmp);
1406 
1407  return TRUE;
1408  }
1409  else
1410  {
1411  if (!copy (real_source, start, len,
1412  real_dest,
1413  insert_at))
1414  return FALSE;
1415 
1416  delete (real_source, start,
1417  len);
1418 
1419  return TRUE;
1420  }
1421 }
1422 
1436  int start,
1437  int len,
1438  DBusString *dest,
1439  int insert_at)
1440 {
1441  DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1442  _dbus_assert (len >= 0);
1443  _dbus_assert (start <= real_source->len);
1444  _dbus_assert (len <= real_source->len - start);
1445 
1446  return copy (real_source, start, len,
1447  real_dest,
1448  insert_at);
1449 }
1450 
1465  int start,
1466  int len,
1467  DBusString *dest,
1468  int replace_at,
1469  int replace_len)
1470 {
1471  DBUS_STRING_COPY_PREAMBLE (source, start, dest, replace_at);
1472  _dbus_assert (len >= 0);
1473  _dbus_assert (start <= real_source->len);
1474  _dbus_assert (len <= real_source->len - start);
1475  _dbus_assert (replace_at >= 0);
1476  _dbus_assert (replace_at <= real_dest->len);
1477  _dbus_assert (replace_len <= real_dest->len - replace_at);
1478 
1479  if (len == replace_len)
1480  {
1481  memmove (real_dest->str + replace_at,
1482  real_source->str + start, len);
1483  }
1484  else if (len < replace_len)
1485  {
1486  memmove (real_dest->str + replace_at,
1487  real_source->str + start, len);
1488  delete (real_dest, replace_at + len,
1489  replace_len - len);
1490  }
1491  else
1492  {
1493  int diff;
1494 
1495  _dbus_assert (len > replace_len);
1496 
1497  diff = len - replace_len;
1498 
1499  /* First of all we check if destination string can be enlarged as
1500  * required, then we overwrite previous bytes
1501  */
1502 
1503  if (!copy (real_source, start + replace_len, diff,
1504  real_dest, replace_at + replace_len))
1505  return FALSE;
1506 
1507  memmove (real_dest->str + replace_at,
1508  real_source->str + start, replace_len);
1509  }
1510 
1511  return TRUE;
1512 }
1513 
1528  unsigned char byte,
1529  DBusString *tail)
1530 {
1531  int byte_position;
1532  char byte_string[2] = "";
1533  int head_length;
1534  int tail_length;
1535 
1536  byte_string[0] = (char) byte;
1537 
1538  if (!_dbus_string_find (source, 0, byte_string, &byte_position))
1539  return FALSE;
1540 
1541  head_length = byte_position;
1542  tail_length = _dbus_string_get_length (source) - head_length - 1;
1543 
1544  if (!_dbus_string_move_len (source, byte_position + 1, tail_length,
1545  tail, 0))
1546  return FALSE;
1547 
1548  /* remove the trailing delimiter byte from the head now.
1549  */
1550  if (!_dbus_string_set_length (source, head_length))
1551  return FALSE;
1552 
1553  return TRUE;
1554 }
1555 
1556 /* Unicode macros and utf8_validate() from GLib Owen Taylor, Havoc
1557  * Pennington, and Tom Tromey are the authors and authorized relicense.
1558  */
1559 
1565 #define UTF8_COMPUTE(Char, Mask, Len) \
1566  if (Char < 128) \
1567  { \
1568  Len = 1; \
1569  Mask = 0x7f; \
1570  } \
1571  else if ((Char & 0xe0) == 0xc0) \
1572  { \
1573  Len = 2; \
1574  Mask = 0x1f; \
1575  } \
1576  else if ((Char & 0xf0) == 0xe0) \
1577  { \
1578  Len = 3; \
1579  Mask = 0x0f; \
1580  } \
1581  else if ((Char & 0xf8) == 0xf0) \
1582  { \
1583  Len = 4; \
1584  Mask = 0x07; \
1585  } \
1586  else if ((Char & 0xfc) == 0xf8) \
1587  { \
1588  Len = 5; \
1589  Mask = 0x03; \
1590  } \
1591  else if ((Char & 0xfe) == 0xfc) \
1592  { \
1593  Len = 6; \
1594  Mask = 0x01; \
1595  } \
1596  else \
1597  { \
1598  Len = 0; \
1599  Mask = 0; \
1600  }
1601 
1606 #define UTF8_LENGTH(Char) \
1607  ((Char) < 0x80 ? 1 : \
1608  ((Char) < 0x800 ? 2 : \
1609  ((Char) < 0x10000 ? 3 : \
1610  ((Char) < 0x200000 ? 4 : \
1611  ((Char) < 0x4000000 ? 5 : 6)))))
1612 
1622 #define UTF8_GET(Result, Chars, Count, Mask, Len) \
1623  (Result) = (Chars)[0] & (Mask); \
1624  for ((Count) = 1; (Count) < (Len); ++(Count)) \
1625  { \
1626  if (((Chars)[(Count)] & 0xc0) != 0x80) \
1627  { \
1628  (Result) = -1; \
1629  break; \
1630  } \
1631  (Result) <<= 6; \
1632  (Result) |= ((Chars)[(Count)] & 0x3f); \
1633  }
1634 
1645 #define UNICODE_VALID(Char) \
1646  ((Char) < 0x110000 && \
1647  (((Char) & 0xFFFFF800) != 0xD800))
1648 
1665  int start,
1666  const char *substr,
1667  int *found)
1668 {
1669  return _dbus_string_find_to (str, start,
1670  ((const DBusRealString*)str)->len,
1671  substr, found);
1672 }
1673 
1688  int start,
1689  int *found,
1690  int *found_len)
1691 {
1692  int i;
1693 
1695  _dbus_assert (start <= real->len);
1696  _dbus_assert (start >= 0);
1697 
1698  i = start;
1699  while (i < real->len)
1700  {
1701  if (real->str[i] == '\r')
1702  {
1703  if ((i+1) < real->len && real->str[i+1] == '\n') /* "\r\n" */
1704  {
1705  if (found)
1706  *found = i;
1707  if (found_len)
1708  *found_len = 2;
1709  return TRUE;
1710  }
1711  else /* only "\r" */
1712  {
1713  if (found)
1714  *found = i;
1715  if (found_len)
1716  *found_len = 1;
1717  return TRUE;
1718  }
1719  }
1720  else if (real->str[i] == '\n') /* only "\n" */
1721  {
1722  if (found)
1723  *found = i;
1724  if (found_len)
1725  *found_len = 1;
1726  return TRUE;
1727  }
1728  ++i;
1729  }
1730 
1731  if (found)
1732  *found = real->len;
1733 
1734  if (found_len)
1735  *found_len = 0;
1736 
1737  return FALSE;
1738 }
1739 
1758  int start,
1759  int end,
1760  const char *substr,
1761  int *found)
1762 {
1763  int i;
1765  _dbus_assert (substr != NULL);
1766  _dbus_assert (start <= real->len);
1767  _dbus_assert (start >= 0);
1768  _dbus_assert (substr != NULL);
1769  _dbus_assert (end <= real->len);
1770  _dbus_assert (start <= end);
1771 
1772  /* we always "find" an empty string */
1773  if (*substr == '\0')
1774  {
1775  if (found)
1776  *found = start;
1777  return TRUE;
1778  }
1779 
1780  i = start;
1781  while (i < end)
1782  {
1783  if (real->str[i] == substr[0])
1784  {
1785  int j = i + 1;
1786 
1787  while (j < end)
1788  {
1789  if (substr[j - i] == '\0')
1790  break;
1791  else if (real->str[j] != substr[j - i])
1792  break;
1793 
1794  ++j;
1795  }
1796 
1797  if (substr[j - i] == '\0')
1798  {
1799  if (found)
1800  *found = i;
1801  return TRUE;
1802  }
1803  }
1804 
1805  ++i;
1806  }
1807 
1808  if (found)
1809  *found = end;
1810 
1811  return FALSE;
1812 }
1813 
1826  int start,
1827  int *found)
1828 {
1829  int i;
1831  _dbus_assert (start <= real->len);
1832  _dbus_assert (start >= 0);
1833 
1834  i = start;
1835  while (i < real->len)
1836  {
1837  if (real->str[i] == ' ' ||
1838  real->str[i] == '\t')
1839  {
1840  if (found)
1841  *found = i;
1842  return TRUE;
1843  }
1844 
1845  ++i;
1846  }
1847 
1848  if (found)
1849  *found = real->len;
1850 
1851  return FALSE;
1852 }
1853 
1862 void
1864  int start,
1865  int *end)
1866 {
1867  int i;
1869  _dbus_assert (start <= real->len);
1870  _dbus_assert (start >= 0);
1871 
1872  i = start;
1873  while (i < real->len)
1874  {
1875  if (!DBUS_IS_ASCII_BLANK (real->str[i]))
1876  break;
1877 
1878  ++i;
1879  }
1880 
1881  _dbus_assert (i == real->len || !DBUS_IS_ASCII_BLANK (real->str[i]));
1882 
1883  if (end)
1884  *end = i;
1885 }
1886 
1887 
1896 void
1898  int start,
1899  int *end)
1900 {
1901  int i;
1903  _dbus_assert (start <= real->len);
1904  _dbus_assert (start >= 0);
1905 
1906  i = start;
1907  while (i < real->len)
1908  {
1909  if (!DBUS_IS_ASCII_WHITE (real->str[i]))
1910  break;
1911 
1912  ++i;
1913  }
1914 
1915  _dbus_assert (i == real->len || !(DBUS_IS_ASCII_WHITE (real->str[i])));
1916 
1917  if (end)
1918  *end = i;
1919 }
1920 
1929 void
1931  int end,
1932  int *start)
1933 {
1934  int i;
1936  _dbus_assert (end <= real->len);
1937  _dbus_assert (end >= 0);
1938 
1939  i = end;
1940  while (i > 0)
1941  {
1942  if (!DBUS_IS_ASCII_WHITE (real->str[i-1]))
1943  break;
1944  --i;
1945  }
1946 
1947  _dbus_assert (i >= 0 && (i == 0 || !(DBUS_IS_ASCII_WHITE (real->str[i-1]))));
1948 
1949  if (start)
1950  *start = i;
1951 }
1952 
1970  DBusString *dest)
1971 {
1972  int eol, eol_len;
1973 
1974  _dbus_string_set_length (dest, 0);
1975 
1976  eol = 0;
1977  eol_len = 0;
1978  if (!_dbus_string_find_eol (source, 0, &eol, &eol_len))
1979  {
1980  _dbus_assert (eol == _dbus_string_get_length (source));
1981  if (eol == 0)
1982  {
1983  /* If there's no newline and source has zero length, we're done */
1984  return FALSE;
1985  }
1986  /* otherwise, the last line of the file has no eol characters */
1987  }
1988 
1989  /* remember eol can be 0 if it's an empty line, but eol_len should not be zero also
1990  * since find_eol returned TRUE
1991  */
1992 
1993  if (!_dbus_string_move_len (source, 0, eol + eol_len, dest, 0))
1994  return FALSE;
1995 
1996  /* remove line ending */
1997  if (!_dbus_string_set_length (dest, eol))
1998  {
1999  _dbus_assert_not_reached ("out of memory when shortening a string");
2000  return FALSE;
2001  }
2002 
2003  return TRUE;
2004 }
2005 
2006 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
2007 
2013 void
2014 _dbus_string_delete_first_word (DBusString *str)
2015 {
2016  int i;
2017 
2018  if (_dbus_string_find_blank (str, 0, &i))
2019  _dbus_string_skip_blank (str, i, &i);
2020 
2021  _dbus_string_delete (str, 0, i);
2022 }
2023 #endif
2024 
2025 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
2026 
2031 void
2032 _dbus_string_delete_leading_blanks (DBusString *str)
2033 {
2034  int i;
2035 
2036  _dbus_string_skip_blank (str, 0, &i);
2037 
2038  if (i > 0)
2039  _dbus_string_delete (str, 0, i);
2040 }
2041 #endif
2042 
2048 void
2050 {
2051  int i;
2052 
2053  _dbus_string_skip_white (str, 0, &i);
2054 
2055  if (i > 0)
2056  _dbus_string_delete (str, 0, i);
2057 
2058  _dbus_string_skip_white_reverse (str, _dbus_string_get_length (str), &i);
2059 
2060  _dbus_string_set_length (str, i);
2061 }
2062 
2074  const DBusString *b)
2075 {
2076  const unsigned char *ap;
2077  const unsigned char *bp;
2078  const unsigned char *a_end;
2079  const DBusRealString *real_a = (const DBusRealString*) a;
2080  const DBusRealString *real_b = (const DBusRealString*) b;
2083 
2084  if (real_a->len != real_b->len)
2085  return FALSE;
2086 
2087  ap = real_a->str;
2088  bp = real_b->str;
2089  a_end = real_a->str + real_a->len;
2090  while (ap != a_end)
2091  {
2092  if (*ap != *bp)
2093  return FALSE;
2094 
2095  ++ap;
2096  ++bp;
2097  }
2098 
2099  return TRUE;
2100 }
2101 
2117  const DBusString *b,
2118  int len)
2119 {
2120  const unsigned char *ap;
2121  const unsigned char *bp;
2122  const unsigned char *a_end;
2123  const DBusRealString *real_a = (const DBusRealString*) a;
2124  const DBusRealString *real_b = (const DBusRealString*) b;
2127 
2128  if (real_a->len != real_b->len &&
2129  (real_a->len < len || real_b->len < len))
2130  return FALSE;
2131 
2132  ap = real_a->str;
2133  bp = real_b->str;
2134  a_end = real_a->str + MIN (real_a->len, len);
2135  while (ap != a_end)
2136  {
2137  if (*ap != *bp)
2138  return FALSE;
2139 
2140  ++ap;
2141  ++bp;
2142  }
2143 
2144  return TRUE;
2145 }
2146 
2165  int a_start,
2166  int a_len,
2167  const DBusString *b,
2168  int b_start)
2169 {
2170  const unsigned char *ap;
2171  const unsigned char *bp;
2172  const unsigned char *a_end;
2173  const DBusRealString *real_a = (const DBusRealString*) a;
2174  const DBusRealString *real_b = (const DBusRealString*) b;
2177  _dbus_assert (a_start >= 0);
2178  _dbus_assert (a_len >= 0);
2179  _dbus_assert (a_start <= real_a->len);
2180  _dbus_assert (a_len <= real_a->len - a_start);
2181  _dbus_assert (b_start >= 0);
2182  _dbus_assert (b_start <= real_b->len);
2183 
2184  if (a_len > real_b->len - b_start)
2185  return FALSE;
2186 
2187  ap = real_a->str + a_start;
2188  bp = real_b->str + b_start;
2189  a_end = ap + a_len;
2190  while (ap != a_end)
2191  {
2192  if (*ap != *bp)
2193  return FALSE;
2194 
2195  ++ap;
2196  ++bp;
2197  }
2198 
2199  _dbus_assert (bp <= (real_b->str + real_b->len));
2200 
2201  return TRUE;
2202 }
2203 
2213  const char *c_str)
2214 {
2215  const unsigned char *ap;
2216  const unsigned char *bp;
2217  const unsigned char *a_end;
2218  const DBusRealString *real_a = (const DBusRealString*) a;
2220  _dbus_assert (c_str != NULL);
2221 
2222  ap = real_a->str;
2223  bp = (const unsigned char*) c_str;
2224  a_end = real_a->str + real_a->len;
2225  while (ap != a_end && *bp)
2226  {
2227  if (*ap != *bp)
2228  return FALSE;
2229 
2230  ++ap;
2231  ++bp;
2232  }
2233 
2234  if (ap != a_end || *bp)
2235  return FALSE;
2236 
2237  return TRUE;
2238 }
2239 
2249  const char *c_str)
2250 {
2251  const unsigned char *ap;
2252  const unsigned char *bp;
2253  const unsigned char *a_end;
2254  const DBusRealString *real_a = (const DBusRealString*) a;
2256  _dbus_assert (c_str != NULL);
2257 
2258  ap = real_a->str;
2259  bp = (const unsigned char*) c_str;
2260  a_end = real_a->str + real_a->len;
2261  while (ap != a_end && *bp)
2262  {
2263  if (*ap != *bp)
2264  return FALSE;
2265 
2266  ++ap;
2267  ++bp;
2268  }
2269 
2270  if (*bp == '\0')
2271  return TRUE;
2272  else
2273  return FALSE;
2274 }
2275 
2287  const char *c_str,
2288  char word_separator)
2289 {
2290  char next_char;
2291  const char *data;
2292  _dbus_assert (c_str != NULL);
2293 
2294  if (!_dbus_string_starts_with_c_str (a, c_str))
2295  return FALSE;
2296 
2297  data = _dbus_string_get_const_data (a);
2298  next_char = data[strlen (c_str)];
2299  return next_char == '\0' || next_char == word_separator;
2300 }
2301 
2312  unsigned char byte)
2313 {
2314  const char hexdigits[16] = {
2315  '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
2316  'a', 'b', 'c', 'd', 'e', 'f'
2317  };
2318 
2319  if (!_dbus_string_append_byte (str,
2320  hexdigits[(byte >> 4)]))
2321  return FALSE;
2322 
2323  if (!_dbus_string_append_byte (str,
2324  hexdigits[(byte & 0x0f)]))
2325  {
2327  _dbus_string_get_length (str) - 1);
2328  return FALSE;
2329  }
2330 
2331  return TRUE;
2332 }
2333 
2346  int start,
2347  DBusString *dest,
2348  int insert_at)
2349 {
2350  DBusString result;
2351  const unsigned char *p;
2352  const unsigned char *end;
2353  dbus_bool_t retval;
2354 
2355  _dbus_assert (start <= _dbus_string_get_length (source));
2356 
2357  if (!_dbus_string_init (&result))
2358  return FALSE;
2359 
2360  retval = FALSE;
2361 
2362  p = (const unsigned char*) _dbus_string_get_const_data (source);
2363  end = p + _dbus_string_get_length (source);
2364  p += start;
2365 
2366  while (p != end)
2367  {
2368  if (!_dbus_string_append_byte_as_hex (&result, *p))
2369  goto out;
2370 
2371  ++p;
2372  }
2373 
2374  if (!_dbus_string_move (&result, 0, dest, insert_at))
2375  goto out;
2376 
2377  retval = TRUE;
2378 
2379  out:
2380  _dbus_string_free (&result);
2381  return retval;
2382 }
2383 
2396  int start,
2397  int *end_return,
2398  DBusString *dest,
2399  int insert_at)
2400 {
2401  DBusString result;
2402  const unsigned char *p;
2403  const unsigned char *end;
2404  dbus_bool_t retval;
2405  dbus_bool_t high_bits;
2406 
2407  _dbus_assert (start <= _dbus_string_get_length (source));
2408 
2409  if (!_dbus_string_init (&result))
2410  return FALSE;
2411 
2412  retval = FALSE;
2413 
2414  high_bits = TRUE;
2415  p = (const unsigned char*) _dbus_string_get_const_data (source);
2416  end = p + _dbus_string_get_length (source);
2417  p += start;
2418 
2419  while (p != end)
2420  {
2421  unsigned int val;
2422 
2423  switch (*p)
2424  {
2425  case '0':
2426  val = 0;
2427  break;
2428  case '1':
2429  val = 1;
2430  break;
2431  case '2':
2432  val = 2;
2433  break;
2434  case '3':
2435  val = 3;
2436  break;
2437  case '4':
2438  val = 4;
2439  break;
2440  case '5':
2441  val = 5;
2442  break;
2443  case '6':
2444  val = 6;
2445  break;
2446  case '7':
2447  val = 7;
2448  break;
2449  case '8':
2450  val = 8;
2451  break;
2452  case '9':
2453  val = 9;
2454  break;
2455  case 'a':
2456  case 'A':
2457  val = 10;
2458  break;
2459  case 'b':
2460  case 'B':
2461  val = 11;
2462  break;
2463  case 'c':
2464  case 'C':
2465  val = 12;
2466  break;
2467  case 'd':
2468  case 'D':
2469  val = 13;
2470  break;
2471  case 'e':
2472  case 'E':
2473  val = 14;
2474  break;
2475  case 'f':
2476  case 'F':
2477  val = 15;
2478  break;
2479  default:
2480  goto done;
2481  }
2482 
2483  if (high_bits)
2484  {
2485  if (!_dbus_string_append_byte (&result,
2486  val << 4))
2487  goto out;
2488  }
2489  else
2490  {
2491  int len;
2492  unsigned char b;
2493 
2494  len = _dbus_string_get_length (&result);
2495 
2496  b = _dbus_string_get_byte (&result, len - 1);
2497 
2498  b |= val;
2499 
2500  _dbus_string_set_byte (&result, len - 1, b);
2501  }
2502 
2503  high_bits = !high_bits;
2504 
2505  ++p;
2506  }
2507 
2508  done:
2509  if (!_dbus_string_move (&result, 0, dest, insert_at))
2510  goto out;
2511 
2512  if (end_return)
2513  *end_return = p - (const unsigned char*) _dbus_string_get_const_data (source);
2514 
2515  retval = TRUE;
2516 
2517  out:
2518  _dbus_string_free (&result);
2519  return retval;
2520 }
2521 
2537  int start,
2538  int len)
2539 {
2540  const unsigned char *s;
2541  const unsigned char *end;
2543  _dbus_assert (start >= 0);
2544  _dbus_assert (start <= real->len);
2545  _dbus_assert (len >= 0);
2546 
2547  if (len > real->len - start)
2548  return FALSE;
2549 
2550  s = real->str + start;
2551  end = s + len;
2552  while (s != end)
2553  {
2554  if (_DBUS_UNLIKELY (!_DBUS_ISASCII (*s)))
2555  return FALSE;
2556 
2557  ++s;
2558  }
2559 
2560  return TRUE;
2561 }
2562 
2570 void
2572  int start,
2573  int len)
2574 {
2575  unsigned char *s;
2576  unsigned char *end;
2577  DBUS_STRING_PREAMBLE (str);
2578  _dbus_assert (start >= 0);
2579  _dbus_assert (start <= real->len);
2580  _dbus_assert (len >= 0);
2581  _dbus_assert (len <= real->len - start);
2582 
2583  s = real->str + start;
2584  end = s + len;
2585 
2586  while (s != end)
2587  {
2588  if (*s >= 'A' && *s <= 'Z')
2589  *s += 'a' - 'A';
2590  ++s;
2591  }
2592 }
2593 
2601 void
2603  int start,
2604  int len)
2605 {
2606  unsigned char *s;
2607  unsigned char *end;
2608  DBUS_STRING_PREAMBLE (str);
2609  _dbus_assert (start >= 0);
2610  _dbus_assert (start <= real->len);
2611  _dbus_assert (len >= 0);
2612  _dbus_assert (len <= real->len - start);
2613 
2614  s = real->str + start;
2615  end = s + len;
2616 
2617  while (s != end)
2618  {
2619  if (*s >= 'a' && *s <= 'z')
2620  *s += 'A' - 'a';
2621  ++s;
2622  }
2623 }
2624 
2642  int start,
2643  int len)
2644 {
2645  const unsigned char *p;
2646  const unsigned char *end;
2648  _dbus_assert (start >= 0);
2649  _dbus_assert (start <= real->len);
2650  _dbus_assert (len >= 0);
2651 
2652  /* we are doing _DBUS_UNLIKELY() here which might be
2653  * dubious in a generic library like GLib, but in D-Bus
2654  * we know we're validating messages and that it would
2655  * only be evil/broken apps that would have invalid
2656  * UTF-8. Also, this function seems to be a performance
2657  * bottleneck in profiles.
2658  */
2659 
2660  if (_DBUS_UNLIKELY (len > real->len - start))
2661  return FALSE;
2662 
2663  p = real->str + start;
2664  end = p + len;
2665 
2666  while (p < end)
2667  {
2668  int i, mask, char_len;
2669  dbus_unichar_t result;
2670 
2671  /* nul bytes considered invalid */
2672  if (*p == '\0')
2673  break;
2674 
2675  /* Special-case ASCII; this makes us go a lot faster in
2676  * D-Bus profiles where we are typically validating
2677  * function names and such. We have to know that
2678  * all following checks will pass for ASCII though,
2679  * comments follow ...
2680  */
2681  if (*p < 128)
2682  {
2683  ++p;
2684  continue;
2685  }
2686 
2687  UTF8_COMPUTE (*p, mask, char_len);
2688 
2689  if (_DBUS_UNLIKELY (char_len == 0)) /* ASCII: char_len == 1 */
2690  break;
2691 
2692  /* check that the expected number of bytes exists in the remaining length */
2693  if (_DBUS_UNLIKELY ((end - p) < char_len)) /* ASCII: p < end and char_len == 1 */
2694  break;
2695 
2696  UTF8_GET (result, p, i, mask, char_len);
2697 
2698  /* Check for overlong UTF-8 */
2699  if (_DBUS_UNLIKELY (UTF8_LENGTH (result) != char_len)) /* ASCII: UTF8_LENGTH == 1 */
2700  break;
2701 #if 0
2702  /* The UNICODE_VALID check below will catch this */
2703  if (_DBUS_UNLIKELY (result == (dbus_unichar_t)-1)) /* ASCII: result = ascii value */
2704  break;
2705 #endif
2706 
2707  if (_DBUS_UNLIKELY (!UNICODE_VALID (result))) /* ASCII: always valid */
2708  break;
2709 
2710  /* UNICODE_VALID should have caught it */
2711  _dbus_assert (result != (dbus_unichar_t)-1);
2712 
2713  p += char_len;
2714  }
2715 
2716  /* See that we covered the entire length if a length was
2717  * passed in
2718  */
2719  if (_DBUS_UNLIKELY (p != end))
2720  return FALSE;
2721  else
2722  return TRUE;
2723 }
2724 
2740  int start,
2741  int len)
2742 {
2743  const unsigned char *s;
2744  const unsigned char *end;
2746  _dbus_assert (start >= 0);
2747  _dbus_assert (len >= 0);
2748  _dbus_assert (start <= real->len);
2749 
2750  if (len > real->len - start)
2751  return FALSE;
2752 
2753  s = real->str + start;
2754  end = s + len;
2755  while (s != end)
2756  {
2757  if (_DBUS_UNLIKELY (*s != '\0'))
2758  return FALSE;
2759  ++s;
2760  }
2761 
2762  return TRUE;
2763 }
2764 
2770 void
2772 {
2773  DBUS_STRING_PREAMBLE (str);
2774 
2775  memset (real->str - real->align_offset, '\0', real->allocated);
2776 }
2779 /* tests are in dbus-string-util.c */
#define DBUS_IS_ASCII_WHITE(c)
Checks for ASCII whitespace byte.
dbus_bool_t _dbus_string_insert_bytes(DBusString *str, int i, int n_bytes, unsigned char byte)
Inserts a number of bytes of a given value at the given position.
Definition: dbus-string.c:615
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:966
void _dbus_string_copy_to_buffer(const DBusString *str, char *buffer, int avail_len)
Copies the contents of a DBusString into a different buffer.
Definition: dbus-string.c:728
#define NULL
A null pointer, defined appropriately for C or C++.
#define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at)
Checks assertions for two strings we&#39;re copying a segment between, and declares real_source/real_dest...
Definition: dbus-string.c:1295
Internals of DBusString.
dbus_bool_t _dbus_string_equal(const DBusString *a, const DBusString *b)
Tests two DBusString for equality.
Definition: dbus-string.c:2073
dbus_bool_t _dbus_string_find_eol(const DBusString *str, int start, int *found, int *found_len)
Finds end of line ("\r\n" or "\n") in the string, returning TRUE and filling in the byte index where ...
Definition: dbus-string.c:1687
dbus_bool_t _dbus_string_lengthen(DBusString *str, int additional_length)
Makes a string longer by the given number of bytes.
Definition: dbus-string.c:791
#define ASSIGN_4_OCTETS(p, octets)
assign 4 bytes from one string to another
Definition: dbus-string.c:986
unsigned int valid
DBusString is valid (initialized and not freed)
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:692
void _dbus_string_copy_to_buffer_with_nul(const DBusString *str, char *buffer, int avail_len)
Copies the contents of a DBusString into a different buffer.
Definition: dbus-string.c:750
dbus_bool_t _dbus_string_hex_encode(const DBusString *source, int start, DBusString *dest, int insert_at)
Encodes a string in hex, the way MD5 and SHA-1 are usually encoded.
Definition: dbus-string.c:2345
#define ASSIGN_8_OCTETS(p, octets)
assign 8 bytes from one string to another
Definition: dbus-string.c:990
dbus_bool_t _dbus_string_starts_with_c_str(const DBusString *a, const char *c_str)
Checks whether a string starts with the given C string.
Definition: dbus-string.c:2248
void _dbus_string_chop_white(DBusString *str)
Deletes leading and trailing whitespace.
Definition: dbus-string.c:2049
dbus_bool_t _dbus_string_insert_8_aligned(DBusString *str, int insert_at, const unsigned char octets[8])
Inserts 8 bytes aligned on an 8 byte boundary with any alignment padding initialized to 0...
Definition: dbus-string.c:1051
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
void _dbus_string_tolower_ascii(const DBusString *str, int start, int len)
Converts the given range of the string to lower case.
Definition: dbus-string.c:2571
#define DBUS_CONST_STRING_PREAMBLE(str)
Checks assertions about a string that may be const or locked.
dbus_bool_t _dbus_string_starts_with_words_c_str(const DBusString *a, const char *c_str, char word_separator)
Checks whether a string starts with the given C string, after which it ends or is separated from the ...
Definition: dbus-string.c:2286
char * _dbus_string_get_data_len(DBusString *str, int start, int len)
Gets a sub-portion of the raw character buffer from the string.
Definition: dbus-string.c:521
#define _DBUS_STRING_MAX_LENGTH
The maximum length of a DBusString.
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:182
dbus_bool_t _dbus_string_append_printf_valist(DBusString *str, const char *format, va_list args)
Appends a printf-style formatted string to the DBusString.
Definition: dbus-string.c:1103
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes.
Definition: dbus-string.c:811
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that&#39;s copied to the d...
Definition: dbus-string.c:1343
#define UTF8_GET(Result, Chars, Count, Mask, Len)
Gets a UTF-8 value.
Definition: dbus-string.c:1622
dbus_bool_t _dbus_string_find(const DBusString *str, int start, const char *substr, int *found)
Finds the given substring in the string, returning TRUE and filling in the byte index where the subst...
Definition: dbus-string.c:1664
void _dbus_string_skip_white(const DBusString *str, int start, int *end)
Skips whitespace from start, storing the first non-whitespace in *end.
Definition: dbus-string.c:1897
#define ASSIGN_2_OCTETS(p, octets)
assign 2 bytes from one string to another
Definition: dbus-string.c:982
dbus_bool_t _dbus_string_move(DBusString *source, int start, DBusString *dest, int insert_at)
Moves the end of one string into another string.
Definition: dbus-string.c:1319
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
Definition: dbus-memory.c:452
#define UNICODE_VALID(Char)
Check whether a Unicode (5.2) char is in a valid range.
Definition: dbus-string.c:1645
dbus_bool_t _dbus_string_equal_c_str(const DBusString *a, const char *c_str)
Checks whether a string is equal to a C string.
Definition: dbus-string.c:2212
dbus_bool_t _dbus_string_compact(DBusString *str, int max_waste)
Compacts the string to avoid wasted memory.
Definition: dbus-string.c:420
dbus_bool_t _dbus_string_copy_data(const DBusString *str, char **data_return)
Copies the data from the string into a char*.
Definition: dbus-string.c:703
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:197
#define DBUS_GENERIC_STRING_PREAMBLE(real)
Checks a bunch of assertions about a string object.
dbus_bool_t _dbus_string_replace_len(const DBusString *source, int start, int len, DBusString *dest, int replace_at, int replace_len)
Replaces a segment of dest string with a segment of source string.
Definition: dbus-string.c:1464
#define DBUS_STRING_PREAMBLE(str)
Checks assertions about a string object that needs to be modifiable - may not be locked or const...
void _dbus_string_skip_blank(const DBusString *str, int start, int *end)
Skips blanks from start, storing the first non-blank in *end (blank is space or tab).
Definition: dbus-string.c:1863
#define UTF8_LENGTH(Char)
computes length of a unicode character in UTF-8
Definition: dbus-string.c:1606
dbus_bool_t _dbus_string_pop_line(DBusString *source, DBusString *dest)
Assigns a newline-terminated or \r\n-terminated line from the front of the string to the given dest s...
Definition: dbus-string.c:1969
void _dbus_string_delete(DBusString *str, int start, int len)
Deletes a segment of a DBusString with length len starting at start.
Definition: dbus-string.c:1253
dbus_bool_t _dbus_string_init_preallocated(DBusString *str, int allocate_size)
Initializes a string that can be up to the given allocation size before it has to realloc...
Definition: dbus-string.c:139
int len
Length without nul.
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
Definition: dbus-string.c:1145
void _dbus_string_zero(DBusString *str)
Clears all allocated bytes in the string to zero.
Definition: dbus-string.c:2771
dbus_bool_t _dbus_string_validate_utf8(const DBusString *str, int start, int len)
Checks that the given range of the string is valid UTF-8.
Definition: dbus-string.c:2641
dbus_bool_t _dbus_string_align_length(DBusString *str, int alignment)
Align the length of a string to a specific alignment (typically 4 or 8) by appending nul bytes to the...
Definition: dbus-string.c:914
dbus_bool_t _dbus_string_equal_substring(const DBusString *a, int a_start, int a_len, const DBusString *b, int b_start)
Tests two sub-parts of two DBusString for equality.
Definition: dbus-string.c:2164
dbus_bool_t _dbus_string_equal_len(const DBusString *a, const DBusString *b, int len)
Tests two DBusString for equality up to the given length.
Definition: dbus-string.c:2116
unsigned int locked
DBusString has been locked and can&#39;t be changed.
dbus_bool_t _dbus_string_init_from_string(DBusString *str, const DBusString *from)
Initializes a string from another string.
Definition: dbus-string.c:254
dbus_bool_t _dbus_string_insert_byte(DBusString *str, int i, unsigned char byte)
Inserts a single byte at the given position.
Definition: dbus-string.c:645
dbus_bool_t _dbus_string_append_byte(DBusString *str, unsigned char byte)
Appends a single byte to the string, returning FALSE if not enough memory.
Definition: dbus-string.c:1188
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as #_DBUS_STRING_I...
Definition: dbus-string.c:278
#define TRUE
Expands to "1".
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
int allocated
Allocated size of data.
#define DBUS_IS_ASCII_BLANK(c)
Checks for ASCII blank byte.
dbus_bool_t _dbus_string_find_blank(const DBusString *str, int start, int *found)
Finds a blank (space or tab) in the string.
Definition: dbus-string.c:1825
dbus_bool_t _dbus_string_alloc_space(DBusString *str, int extra_bytes)
Preallocate extra_bytes such that a future lengthening of the string by extra_bytes is guaranteed to ...
Definition: dbus-string.c:930
dbus_bool_t _dbus_string_hex_decode(const DBusString *source, int start, int *end_return, DBusString *dest, int insert_at)
Decodes a string from hex encoding.
Definition: dbus-string.c:2395
unsigned int align_offset
str - align_offset is the actual malloc block
dbus_bool_t _dbus_string_append_byte_as_hex(DBusString *str, unsigned char byte)
Appends a two-character hex digit to a string, where the hex digit has the value of the given byte...
Definition: dbus-string.c:2311
dbus_bool_t _dbus_string_append_len(DBusString *str, const char *buffer, int len)
Appends block of bytes with the given length to a DBusString.
Definition: dbus-string.c:1168
dbus_bool_t _dbus_string_find_to(const DBusString *str, int start, int end, const char *substr, int *found)
Finds the given substring in the string, up to a certain position, returning TRUE and filling in the ...
Definition: dbus-string.c:1757
unsigned char * str
String data, plus nul termination.
dbus_bool_t _dbus_string_validate_nul(const DBusString *str, int start, int len)
Checks that the given range of the string is all nul bytes.
Definition: dbus-string.c:2739
#define FALSE
Expands to "0".
dbus_bool_t _dbus_string_insert_4_aligned(DBusString *str, int insert_at, const unsigned char octets[4])
Inserts 4 bytes aligned on a 4 byte boundary with any alignment padding initialized to 0...
Definition: dbus-string.c:1027
void _dbus_string_skip_white_reverse(const DBusString *str, int end, int *start)
Skips whitespace from end, storing the start index of the trailing whitespace in *start.
Definition: dbus-string.c:1930
#define DBUS_LOCKED_STRING_PREAMBLE(str)
Checks assertions about a string object that may be locked but can&#39;t be const.
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:833
dbus_bool_t _dbus_string_insert_2_aligned(DBusString *str, int insert_at, const unsigned char octets[2])
Inserts 2 bytes aligned on a 2 byte boundary with any alignment padding initialized to 0...
Definition: dbus-string.c:1003
dbus_bool_t _dbus_string_copy_len(const DBusString *source, int start, int len, DBusString *dest, int insert_at)
Like _dbus_string_copy(), but can copy a segment from the middle of the source string.
Definition: dbus-string.c:1435
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string.
Definition: dbus-string.c:672
void * dbus_realloc(void *memory, size_t bytes)
Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:592
void _dbus_string_toupper_ascii(const DBusString *str, int start, int len)
Converts the given range of the string to upper case.
Definition: dbus-string.c:2602
int _dbus_printf_string_upper_bound(const char *format, va_list args)
Measure the length of the given format string and arguments, not including the terminating nul...
#define UTF8_COMPUTE(Char, Mask, Len)
computes length and mask of a unicode character
Definition: dbus-string.c:1565
dbus_bool_t _dbus_string_insert_alignment(DBusString *str, int *insert_at, int alignment)
Inserts padding at *insert_at such to align it to the given boundary.
Definition: dbus-string.c:1079
dbus_bool_t _dbus_string_validate_ascii(const DBusString *str, int start, int len)
Checks that the given range of the string is valid ASCII with no nul bytes.
Definition: dbus-string.c:2536
void _dbus_string_init_const_len(DBusString *str, const char *value, int len)
Initializes a constant string with a length.
Definition: dbus-string.c:217
dbus_bool_t _dbus_string_move_len(DBusString *source, int start, int len, DBusString *dest, int insert_at)
Like _dbus_string_move(), but can move a segment from the middle of the source string.
Definition: dbus-string.c:1368
unsigned int constant
String data is not owned by DBusString.
dbus_bool_t _dbus_string_append_strings(DBusString *str, char **strings, char separator)
Append vector with strings connected by separator.
Definition: dbus-string.c:1211
dbus_bool_t _dbus_string_split_on_byte(DBusString *source, unsigned char byte, DBusString *tail)
Looks for the first occurance of a byte, deletes that byte, and moves everything after the byte to th...
Definition: dbus-string.c:1527