D-Bus: dbus-string.c Source File

D-Bus 1.12.18

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 (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
5 * Copyright (C) 2006 Ralf Habacker <ralf.habacker@freenet.de>
6 *
7 * Licensed under the Academic Free License version 2.1
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 */
24
25 #include <config.h>
26 #include "dbus-internals.h"
27 #include "dbus-string.h"
28 /* we allow a system header here, for speed/convenience */
29 #include <string.h>
30 /* for vsnprintf */
31 #include <stdio.h>
32 #define DBUS_CAN_USE_DBUS_STRING_PRIVATE 1
33 #include "dbus-string-private.h"
34 #include "dbus-marshal-basic.h" /* probably should be removed by moving the usage of DBUS_TYPE
35 * into the marshaling-related files
36 */
37 /* for DBUS_VA_COPY */
38 #include "dbus-sysdeps.h"
39
78 static void
79 fixup_alignment (DBusRealString *real)
80 {
81 unsigned char *aligned;
82 unsigned char *real_block;
83 unsigned int old_align_offset;
84
85 /* we have to have extra space in real->allocated for the align offset and nul byte */
86 _dbus_assert (real->len <= real->allocated - _DBUS_STRING_ALLOCATION_PADDING);
87
88 old_align_offset = real->align_offset;
89 real_block = real->str - old_align_offset;
90
91 aligned = _DBUS_ALIGN_ADDRESS (real_block, 8);
92
93 real->align_offset = aligned - real_block;
94 real->str = aligned;
95
96 if (old_align_offset != real->align_offset)
97 {
98 /* Here comes the suck */
99 memmove (real_block + real->align_offset,
100 real_block + old_align_offset,
101 real->len + 1);
102 }
103
104 _dbus_assert (real->align_offset < 8);
105 _dbus_assert (_DBUS_ALIGN_ADDRESS (real->str, 8) == real->str);
106 }
107
108 static void
109 undo_alignment (DBusRealString *real)
110 {
111 if (real->align_offset != 0)
112 {
113 memmove (real->str - real->align_offset,
114 real->str,
115 real->len + 1);
116
117 real->str = real->str - real->align_offset;
118 real->align_offset = 0;
119 }
120 }
121
131 dbus_bool_t
132 _dbus_string_init_preallocated (DBusString *str,
133 int allocate_size)
134 {
135 DBusRealString *real;
136
137 _DBUS_STATIC_ASSERT (sizeof (DBusString) == sizeof (DBusRealString));
138
139 _dbus_assert (str != NULL);
140
141 real = (DBusRealString*) str;
142
143 /* It's very important not to touch anything
144 * other than real->str if we're going to fail,
145 * since we also use this function to reset
146 * an existing string, e.g. in _dbus_string_steal_data()
147 */
148
149 real->str = dbus_malloc (_DBUS_STRING_ALLOCATION_PADDING + allocate_size);
150 if (real->str == NULL)
151 return FALSE;
152
153 real->allocated = _DBUS_STRING_ALLOCATION_PADDING + allocate_size;
154 real->len = 0;
155 real->str[real->len] = '\0';
156
157 real->constant = FALSE;
158 real->locked = FALSE;
159 real->invalid = FALSE;
160 real->align_offset = 0;
161
162 fixup_alignment (real);
163
164 return TRUE;
165 }
166
174 dbus_bool_t
175 _dbus_string_init (DBusString *str)
176 {
177 return _dbus_string_init_preallocated (str, 0);
178 }
179
189 void
190 _dbus_string_init_const (DBusString *str,
191 const char *value)
192 {
193 _dbus_assert (value != NULL);
194
195 _dbus_string_init_const_len (str, value,
196 strlen (value));
197 }
198
209 void
210 _dbus_string_init_const_len (DBusString *str,
211 const char *value,
212 int len)
213 {
214 DBusRealString *real;
215
216 _dbus_assert (str != NULL);
217 _dbus_assert (len == 0 || value != NULL);
218 _dbus_assert (len <= _DBUS_STRING_MAX_LENGTH);
219 _dbus_assert (len >= 0);
220
221 real = (DBusRealString*) str;
222
223 real->str = (unsigned char*) value;
224 real->len = len;
225 real->allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING; /* a lie, just to avoid special-case assertions... */
226 real->constant = TRUE;
227 real->locked = TRUE;
228 real->invalid = FALSE;
229 real->align_offset = 0;
230
231 /* We don't require const strings to be 8-byte aligned as the
232 * memory is coming from elsewhere.
233 */
234 }
235
244 dbus_bool_t
245 _dbus_string_init_from_string(DBusString *str,
246 const DBusString *from)
247 {
248 if (!_dbus_string_init (str))
249 return FALSE;
250 return _dbus_string_append (str, _dbus_string_get_const_data (from));
251 }
252
258 void
259 _dbus_string_free (DBusString *str)
260 {
261 DBusRealString *real = (DBusRealString*) str;
262 DBUS_GENERIC_STRING_PREAMBLE (real);
263
264 if (real->constant)
265 return;
266
267 /* so it's safe if @p str returned by a failed
268 * _dbus_string_init call
269 * Bug: https://bugs.freedesktop.org/show_bug.cgi?id=65959
270 */
271 if (real->str == NULL)
272 return;
273
274 dbus_free (real->str - real->align_offset);
275
276 real->invalid = TRUE;
277 }
278
279 static dbus_bool_t
280 compact (DBusRealString *real,
281 int max_waste)
282 {
283 unsigned char *new_str;
284 int new_allocated;
285 int waste;
286
287 waste = real->allocated - (real->len + _DBUS_STRING_ALLOCATION_PADDING);
288
289 if (waste <= max_waste)
290 return TRUE;
291
292 new_allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
293
294 new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
295 if (_DBUS_UNLIKELY (new_str == NULL))
296 return FALSE;
297
298 real->str = new_str + real->align_offset;
299 real->allocated = new_allocated;
300 fixup_alignment (real);
301
302 return TRUE;
303 }
304
305 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
306 /* Not using this feature at the moment,
307 * so marked DBUS_ENABLE_EMBEDDED_TESTS-only
308 */
318 void
319 _dbus_string_lock (DBusString *str)
320 {
321 DBUS_LOCKED_STRING_PREAMBLE (str); /* can lock multiple times */
322
323 real->locked = TRUE;
324
325 /* Try to realloc to avoid excess memory usage, since
326 * we know we won't change the string further
327 */
328 #define MAX_WASTE 48
329 compact (real, MAX_WASTE);
330 }
331 #endif /* DBUS_ENABLE_EMBEDDED_TESTS */
332
333 static dbus_bool_t
334 reallocate_for_length (DBusRealString *real,
335 int new_length)
336 {
337 int new_allocated;
338 unsigned char *new_str;
339
340 /* at least double our old allocation to avoid O(n), avoiding
341 * overflow
342 */
343 if (real->allocated > (_DBUS_STRING_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING) / 2)
344 new_allocated = _DBUS_STRING_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING;
345 else
346 new_allocated = real->allocated * 2;
347
348 /* if you change the code just above here, run the tests without
349 * the following assert-only hack before you commit
350 */
351 /* This is keyed off asserts in addition to tests so when you
352 * disable asserts to profile, you don't get this destroyer
353 * of profiles.
354 */
355 #if defined (DBUS_ENABLE_EMBEDDED_TESTS) && !defined (DBUS_DISABLE_ASSERT)
356 new_allocated = 0; /* ensure a realloc every time so that we go
357 * through all malloc failure codepaths
358 */
359 #endif
360
361 /* But be sure we always alloc at least space for the new length */
362 new_allocated = MAX (new_allocated,
363 new_length + _DBUS_STRING_ALLOCATION_PADDING);
364
365 _dbus_assert (new_allocated >= real->allocated); /* code relies on this */
366 new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
367 if (_DBUS_UNLIKELY (new_str == NULL))
368 return FALSE;
369
370 real->str = new_str + real->align_offset;
371 real->allocated = new_allocated;
372 fixup_alignment (real);
373
374 return TRUE;
375 }
376
388 dbus_bool_t
389 _dbus_string_compact (DBusString *str,
390 int max_waste)
391 {
392 DBUS_STRING_PREAMBLE (str);
393
394 return compact (real, max_waste);
395 }
396
397 static dbus_bool_t
398 set_length (DBusRealString *real,
399 int new_length)
400 {
401 /* Note, we are setting the length not including nul termination */
402
403 /* exceeding max length is the same as failure to allocate memory */
404 if (_DBUS_UNLIKELY (new_length > _DBUS_STRING_MAX_LENGTH))
405 return FALSE;
406 else if (new_length > (real->allocated - _DBUS_STRING_ALLOCATION_PADDING) &&
407 _DBUS_UNLIKELY (!reallocate_for_length (real, new_length)))
408 return FALSE;
409 else
410 {
411 real->len = new_length;
412 real->str[new_length] = '\0';
413 return TRUE;
414 }
415 }
416
417 static dbus_bool_t
418 open_gap (int len,
419 DBusRealString *dest,
420 int insert_at)
421 {
422 if (len == 0)
423 return TRUE;
424
425 if (len > _DBUS_STRING_MAX_LENGTH - dest->len)
426 return FALSE; /* detected overflow of dest->len + len below */
427
428 if (!set_length (dest, dest->len + len))
429 return FALSE;
430
431 memmove (dest->str + insert_at + len,
432 dest->str + insert_at,
433 dest->len - len - insert_at);
434
435 return TRUE;
436 }
437
438 #ifndef _dbus_string_get_data
439
450 char*
451 _dbus_string_get_data (DBusString *str)
452 {
453 DBUS_STRING_PREAMBLE (str);
454
455 return (char*) real->str;
456 }
457 #endif /* _dbus_string_get_data */
458
459 /* only do the function if we don't have the macro */
460 #ifndef _dbus_string_get_const_data
461
467 const char*
468 _dbus_string_get_const_data (const DBusString *str)
469 {
470 DBUS_CONST_STRING_PREAMBLE (str);
471
472 return (const char*) real->str;
473 }
474 #endif /* _dbus_string_get_const_data */
475
489 char*
490 _dbus_string_get_data_len (DBusString *str,
491 int start,
492 int len)
493 {
494 DBUS_STRING_PREAMBLE (str);
495 _dbus_assert (start >= 0);
496 _dbus_assert (len >= 0);
497 _dbus_assert (start <= real->len);
498 _dbus_assert (len <= real->len - start);
499
500 return (char*) real->str + start;
501 }
502
503 /* only do the function if we don't have the macro */
504 #ifndef _dbus_string_get_const_data_len
505
513 const char*
514 _dbus_string_get_const_data_len (const DBusString *str,
515 int start,
516 int len)
517 {
518 DBUS_CONST_STRING_PREAMBLE (str);
519 _dbus_assert (start >= 0);
520 _dbus_assert (len >= 0);
521 _dbus_assert (start <= real->len);
522 _dbus_assert (len <= real->len - start);
523
524 return (const char*) real->str + start;
525 }
526 #endif /* _dbus_string_get_const_data_len */
527
528 /* only do the function if we don't have the macro */
529 #ifndef _dbus_string_set_byte
530
537 void
538 _dbus_string_set_byte (DBusString *str,
539 int i,
540 unsigned char byte)
541 {
542 DBUS_STRING_PREAMBLE (str);
543 _dbus_assert (i < real->len);
544 _dbus_assert (i >= 0);
545
546 real->str[i] = byte;
547 }
548 #endif /* _dbus_string_set_byte */
549
550 /* only have the function if we didn't create a macro */
551 #ifndef _dbus_string_get_byte
552
561 unsigned char
562 _dbus_string_get_byte (const DBusString *str,
563 int start)
564 {
565 DBUS_CONST_STRING_PREAMBLE (str);
566 _dbus_assert (start <= real->len);
567 _dbus_assert (start >= 0);
568
569 return real->str[start];
570 }
571 #endif /* _dbus_string_get_byte */
572
583 dbus_bool_t
584 _dbus_string_insert_bytes (DBusString *str,
585 int i,
586 int n_bytes,
587 unsigned char byte)
588 {
589 DBUS_STRING_PREAMBLE (str);
590 _dbus_assert (i <= real->len);
591 _dbus_assert (i >= 0);
592 _dbus_assert (n_bytes >= 0);
593
594 if (n_bytes == 0)
595 return TRUE;
596
597 if (!open_gap (n_bytes, real, i))
598 return FALSE;
599
600 memset (real->str + i, byte, n_bytes);
601
602 return TRUE;
603 }
604
613 dbus_bool_t
614 _dbus_string_insert_byte (DBusString *str,
615 int i,
616 unsigned char byte)
617 {
618 DBUS_STRING_PREAMBLE (str);
619 _dbus_assert (i <= real->len);
620 _dbus_assert (i >= 0);
621
622 if (!open_gap (1, real, i))
623 return FALSE;
624
625 real->str[i] = byte;
626
627 return TRUE;
628 }
629
640 dbus_bool_t
641 _dbus_string_steal_data (DBusString *str,
642 char **data_return)
643 {
644 DBUS_STRING_PREAMBLE (str);
645 _dbus_assert (data_return != NULL);
646
647 undo_alignment (real);
648
649 *data_return = (char*) real->str;
650
651 /* reset the string */
652 if (!_dbus_string_init (str))
653 {
654 /* hrm, put it back then */
655 real->str = (unsigned char*) *data_return;
656 *data_return = NULL;
657 fixup_alignment (real);
658 return FALSE;
659 }
660
661 return TRUE;
662 }
663
671 dbus_bool_t
672 _dbus_string_copy_data (const DBusString *str,
673 char **data_return)
674 {
675 DBUS_CONST_STRING_PREAMBLE (str);
676 _dbus_assert (data_return != NULL);
677
678 *data_return = dbus_malloc (real->len + 1);
679 if (*data_return == NULL)
680 return FALSE;
681
682 memcpy (*data_return, real->str, real->len + 1);
683
684 return TRUE;
685 }
686
696 void
697 _dbus_string_copy_to_buffer (const DBusString *str,
698 char *buffer,
699 int avail_len)
700 {
701 DBUS_CONST_STRING_PREAMBLE (str);
702
703 _dbus_assert (avail_len >= 0);
704 _dbus_assert (avail_len >= real->len);
705
706 memcpy (buffer, real->str, real->len);
707 }
708
718 void
719 _dbus_string_copy_to_buffer_with_nul (const DBusString *str,
720 char *buffer,
721 int avail_len)
722 {
723 DBUS_CONST_STRING_PREAMBLE (str);
724
725 _dbus_assert (avail_len >= 0);
726 _dbus_assert (avail_len > real->len);
727
728 memcpy (buffer, real->str, real->len+1);
729 }
730
731 /* Only have the function if we don't have the macro */
732 #ifndef _dbus_string_get_length
733
738 int
739 _dbus_string_get_length (const DBusString *str)
740 {
741 DBUS_CONST_STRING_PREAMBLE (str);
742
743 return real->len;
744 }
745 #endif /* !_dbus_string_get_length */
746
759 dbus_bool_t
760 _dbus_string_lengthen (DBusString *str,
761 int additional_length)
762 {
763 DBUS_STRING_PREAMBLE (str);
764 _dbus_assert (additional_length >= 0);
765
766 if (_DBUS_UNLIKELY (additional_length > _DBUS_STRING_MAX_LENGTH - real->len))
767 return FALSE; /* would overflow */
768
769 return set_length (real,
770 real->len + additional_length);
771 }
772
779 void
780 _dbus_string_shorten (DBusString *str,
781 int length_to_remove)
782 {
783 DBUS_STRING_PREAMBLE (str);
784 _dbus_assert (length_to_remove >= 0);
785 _dbus_assert (length_to_remove <= real->len);
786
787 set_length (real,
788 real->len - length_to_remove);
789 }
790
801 dbus_bool_t
802 _dbus_string_set_length (DBusString *str,
803 int length)
804 {
805 DBUS_STRING_PREAMBLE (str);
806 _dbus_assert (length >= 0);
807
808 return set_length (real, length);
809 }
810
811 static dbus_bool_t
812 align_insert_point_then_open_gap (DBusString *str,
813 int *insert_at_p,
814 int alignment,
815 int gap_size)
816 {
817 unsigned long new_len; /* ulong to avoid _DBUS_ALIGN_VALUE overflow */
818 unsigned long gap_pos;
819 int insert_at;
820 int delta;
821 DBUS_STRING_PREAMBLE (str);
822 _dbus_assert (alignment >= 1);
823 _dbus_assert (alignment <= 8); /* it has to be a bug if > 8 */
824
825 insert_at = *insert_at_p;
826
827 _dbus_assert (insert_at <= real->len);
828
829 gap_pos = _DBUS_ALIGN_VALUE (insert_at, alignment);
830 new_len = real->len + (gap_pos - insert_at) + gap_size;
831
832 if (_DBUS_UNLIKELY (new_len > (unsigned long) _DBUS_STRING_MAX_LENGTH))
833 return FALSE;
834
835 delta = new_len - real->len;
836 _dbus_assert (delta >= 0);
837
838 if (delta == 0) /* only happens if gap_size == 0 and insert_at is aligned already */
839 {
840 _dbus_assert (((unsigned long) *insert_at_p) == gap_pos);
841 return TRUE;
842 }
843
844 if (_DBUS_UNLIKELY (!open_gap (new_len - real->len,
845 real, insert_at)))
846 return FALSE;
847
848 /* nul the padding if we had to add any padding */
849 if (gap_size < delta)
850 {
851 memset (&real->str[insert_at], '\0',
852 gap_pos - insert_at);
853 }
854
855 *insert_at_p = gap_pos;
856
857 return TRUE;
858 }
859
860 static dbus_bool_t
861 align_length_then_lengthen (DBusString *str,
862 int alignment,
863 int then_lengthen_by)
864 {
865 int insert_at;
866
867 insert_at = _dbus_string_get_length (str);
868
869 return align_insert_point_then_open_gap (str,
870 &insert_at,
871 alignment, then_lengthen_by);
872 }
873
882 dbus_bool_t
883 _dbus_string_align_length (DBusString *str,
884 int alignment)
885 {
886 return align_length_then_lengthen (str, alignment, 0);
887 }
888
898 dbus_bool_t
899 _dbus_string_alloc_space (DBusString *str,
900 int extra_bytes)
901 {
902 if (!_dbus_string_lengthen (str, extra_bytes))
903 return FALSE;
904 _dbus_string_shorten (str, extra_bytes);
905
906 return TRUE;
907 }
908
909 static dbus_bool_t
910 append (DBusRealString *real,
911 const char *buffer,
912 int buffer_len)
913 {
914 if (buffer_len == 0)
915 return TRUE;
916
917 if (!_dbus_string_lengthen ((DBusString*)real, buffer_len))
918 return FALSE;
919
920 memcpy (real->str + (real->len - buffer_len),
921 buffer,
922 buffer_len);
923
924 return TRUE;
925 }
926
934 dbus_bool_t
935 _dbus_string_append (DBusString *str,
936 const char *buffer)
937 {
938 unsigned long buffer_len;
939
940 DBUS_STRING_PREAMBLE (str);
941 _dbus_assert (buffer != NULL);
942
943 buffer_len = strlen (buffer);
944 if (buffer_len > (unsigned long) _DBUS_STRING_MAX_LENGTH)
945 return FALSE;
946
947 return append (real, buffer, buffer_len);
948 }
949
951 #define ASSIGN_2_OCTETS(p, octets) \
952 *((dbus_uint16_t*)(p)) = *((dbus_uint16_t*)(octets));
953
955 #define ASSIGN_4_OCTETS(p, octets) \
956 *((dbus_uint32_t*)(p)) = *((dbus_uint32_t*)(octets));
957
959 #define ASSIGN_8_OCTETS(p, octets) \
960 *((dbus_uint64_t*)(p)) = *((dbus_uint64_t*)(octets));
961
971 dbus_bool_t
972 _dbus_string_insert_2_aligned (DBusString *str,
973 int insert_at,
974 const unsigned char octets[2])
975 {
976 DBUS_STRING_PREAMBLE (str);
977
978 if (!align_insert_point_then_open_gap (str, &insert_at, 2, 2))
979 return FALSE;
980
981 ASSIGN_2_OCTETS (real->str + insert_at, octets);
982
983 return TRUE;
984 }
985
995 dbus_bool_t
996 _dbus_string_insert_4_aligned (DBusString *str,
997 int insert_at,
998 const unsigned char octets[4])
999 {
1000 DBUS_STRING_PREAMBLE (str);
1001
1002 if (!align_insert_point_then_open_gap (str, &insert_at, 4, 4))
1003 return FALSE;
1004
1005 ASSIGN_4_OCTETS (real->str + insert_at, octets);
1006
1007 return TRUE;
1008 }
1009
1019 dbus_bool_t
1020 _dbus_string_insert_8_aligned (DBusString *str,
1021 int insert_at,
1022 const unsigned char octets[8])
1023 {
1024 DBUS_STRING_PREAMBLE (str);
1025
1026 if (!align_insert_point_then_open_gap (str, &insert_at, 8, 8))
1027 return FALSE;
1028
1029 _dbus_assert (_DBUS_ALIGN_VALUE (insert_at, 8) == (unsigned) insert_at);
1030
1031 ASSIGN_8_OCTETS (real->str + insert_at, octets);
1032
1033 return TRUE;
1034 }
1035
1036
1047 dbus_bool_t
1048 _dbus_string_insert_alignment (DBusString *str,
1049 int *insert_at,
1050 int alignment)
1051 {
1052 DBUS_STRING_PREAMBLE (str);
1053
1054 if (!align_insert_point_then_open_gap (str, insert_at, alignment, 0))
1055 return FALSE;
1056
1057 _dbus_assert (_DBUS_ALIGN_VALUE (*insert_at, alignment) == (unsigned) *insert_at);
1058
1059 return TRUE;
1060 }
1061
1071 dbus_bool_t
1072 _dbus_string_append_printf_valist (DBusString *str,
1073 const char *format,
1074 va_list args)
1075 {
1076 dbus_bool_t ret = FALSE;
1077 int len;
1078 va_list args_copy;
1079
1080 DBUS_STRING_PREAMBLE (str);
1081
1082 DBUS_VA_COPY (args_copy, args);
1083
1084 /* Measure the message length without terminating nul */
1085 len = _dbus_printf_string_upper_bound (format, args);
1086
1087 if (len < 0)
1088 goto out;
1089
1090 if (!_dbus_string_lengthen (str, len))
1091 {
1092 goto out;
1093 }
1094
1095 vsprintf ((char*) (real->str + (real->len - len)),
1096 format, args_copy);
1097 ret = TRUE;
1098
1099 out:
1100 va_end (args_copy);
1101
1102 return ret;
1103 }
1104
1113 dbus_bool_t
1114 _dbus_string_append_printf (DBusString *str,
1115 const char *format,
1116 ...)
1117 {
1118 va_list args;
1119 dbus_bool_t retval;
1120
1121 va_start (args, format);
1122 retval = _dbus_string_append_printf_valist (str, format, args);
1123 va_end (args);
1124
1125 return retval;
1126 }
1127
1136 dbus_bool_t
1137 _dbus_string_append_len (DBusString *str,
1138 const char *buffer,
1139 int len)
1140 {
1141 DBUS_STRING_PREAMBLE (str);
1142 _dbus_assert (buffer != NULL);
1143 _dbus_assert (len >= 0);
1144
1145 return append (real, buffer, len);
1146 }
1147
1156 dbus_bool_t
1157 _dbus_string_append_byte (DBusString *str,
1158 unsigned char byte)
1159 {
1160 DBUS_STRING_PREAMBLE (str);
1161
1162 if (!set_length (real, real->len + 1))
1163 return FALSE;
1164
1165 real->str[real->len-1] = byte;
1166
1167 return TRUE;
1168 }
1169
1170 static void
1171 delete (DBusRealString *real,
1172 int start,
1173 int len)
1174 {
1175 if (len == 0)
1176 return;
1177
1178 memmove (real->str + start, real->str + start + len, real->len - (start + len));
1179 real->len -= len;
1180 real->str[real->len] = '\0';
1181 }
1182
1192 void
1193 _dbus_string_delete (DBusString *str,
1194 int start,
1195 int len)
1196 {
1197 DBUS_STRING_PREAMBLE (str);
1198 _dbus_assert (start >= 0);
1199 _dbus_assert (len >= 0);
1200 _dbus_assert (start <= real->len);
1201 _dbus_assert (len <= real->len - start);
1202
1203 delete (real, start, len);
1204 }
1205
1206 static dbus_bool_t
1207 copy (DBusRealString *source,
1208 int start,
1209 int len,
1210 DBusRealString *dest,
1211 int insert_at)
1212 {
1213 if (len == 0)
1214 return TRUE;
1215
1216 if (!open_gap (len, dest, insert_at))
1217 return FALSE;
1218
1219 memmove (dest->str + insert_at,
1220 source->str + start,
1221 len);
1222
1223 return TRUE;
1224 }
1225
1235 #define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at) \
1236 DBusRealString *real_source = (DBusRealString*) source; \
1237 DBusRealString *real_dest = (DBusRealString*) dest; \
1238 _dbus_assert ((source) != (dest)); \
1239 DBUS_GENERIC_STRING_PREAMBLE (real_source); \
1240 DBUS_GENERIC_STRING_PREAMBLE (real_dest); \
1241 _dbus_assert (!real_dest->constant); \
1242 _dbus_assert (!real_dest->locked); \
1243 _dbus_assert ((start) >= 0); \
1244 _dbus_assert ((start) <= real_source->len); \
1245 _dbus_assert ((insert_at) >= 0); \
1246 _dbus_assert ((insert_at) <= real_dest->len)
1247
1258 dbus_bool_t
1259 _dbus_string_move (DBusString *source,
1260 int start,
1261 DBusString *dest,
1262 int insert_at)
1263 {
1264 DBusRealString *real_source = (DBusRealString*) source;
1265 _dbus_assert (start <= real_source->len);
1266
1267 return _dbus_string_move_len (source, start,
1268 real_source->len - start,
1269 dest, insert_at);
1270 }
1271
1282 dbus_bool_t
1283 _dbus_string_copy (const DBusString *source,
1284 int start,
1285 DBusString *dest,
1286 int insert_at)
1287 {
1288 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1289
1290 return copy (real_source, start,
1291 real_source->len - start,
1292 real_dest,
1293 insert_at);
1294 }
1295
1307 dbus_bool_t
1308 _dbus_string_move_len (DBusString *source,
1309 int start,
1310 int len,
1311 DBusString *dest,
1312 int insert_at)
1313
1314 {
1315 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1316 _dbus_assert (len >= 0);
1317 _dbus_assert ((start + len) <= real_source->len);
1318
1319
1320 if (len == 0)
1321 {
1322 return TRUE;
1323 }
1324 else if (start == 0 &&
1325 len == real_source->len &&
1326 real_dest->len == 0)
1327 {
1328 /* Short-circuit moving an entire existing string to an empty string
1329 * by just swapping the buffers.
1330 */
1331 /* we assume ->constant doesn't matter as you can't have
1332 * a constant string involved in a move.
1333 */
1334 #define ASSIGN_DATA(a, b) do { \
1335 (a)->str = (b)->str; \
1336 (a)->len = (b)->len; \
1337 (a)->allocated = (b)->allocated; \
1338 (a)->align_offset = (b)->align_offset; \
1339 } while (0)
1340
1341 DBusRealString tmp;
1342
1343 ASSIGN_DATA (&tmp, real_source);
1344 ASSIGN_DATA (real_source, real_dest);
1345 ASSIGN_DATA (real_dest, &tmp);
1346
1347 return TRUE;
1348 }
1349 else
1350 {
1351 if (!copy (real_source, start, len,
1352 real_dest,
1353 insert_at))
1354 return FALSE;
1355
1356 delete (real_source, start,
1357 len);
1358
1359 return TRUE;
1360 }
1361 }
1362
1374 dbus_bool_t
1375 _dbus_string_copy_len (const DBusString *source,
1376 int start,
1377 int len,
1378 DBusString *dest,
1379 int insert_at)
1380 {
1381 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1382 _dbus_assert (len >= 0);
1383 _dbus_assert (start <= real_source->len);
1384 _dbus_assert (len <= real_source->len - start);
1385
1386 return copy (real_source, start, len,
1387 real_dest,
1388 insert_at);
1389 }
1390
1403 dbus_bool_t
1404 _dbus_string_replace_len (const DBusString *source,
1405 int start,
1406 int len,
1407 DBusString *dest,
1408 int replace_at,
1409 int replace_len)
1410 {
1411 DBUS_STRING_COPY_PREAMBLE (source, start, dest, replace_at);
1412 _dbus_assert (len >= 0);
1413 _dbus_assert (start <= real_source->len);
1414 _dbus_assert (len <= real_source->len - start);
1415 _dbus_assert (replace_at >= 0);
1416 _dbus_assert (replace_at <= real_dest->len);
1417 _dbus_assert (replace_len <= real_dest->len - replace_at);
1418
1419 if (len == replace_len)
1420 {
1421 memmove (real_dest->str + replace_at,
1422 real_source->str + start, len);
1423 }
1424 else if (len < replace_len)
1425 {
1426 memmove (real_dest->str + replace_at,
1427 real_source->str + start, len);
1428 delete (real_dest, replace_at + len,
1429 replace_len - len);
1430 }
1431 else
1432 {
1433 int diff;
1434
1435 _dbus_assert (len > replace_len);
1436
1437 diff = len - replace_len;
1438
1439 /* First of all we check if destination string can be enlarged as
1440 * required, then we overwrite previous bytes
1441 */
1442
1443 if (!copy (real_source, start + replace_len, diff,
1444 real_dest, replace_at + replace_len))
1445 return FALSE;
1446
1447 memmove (real_dest->str + replace_at,
1448 real_source->str + start, replace_len);
1449 }
1450
1451 return TRUE;
1452 }
1453
1466 dbus_bool_t
1467 _dbus_string_split_on_byte (DBusString *source,
1468 unsigned char byte,
1469 DBusString *tail)
1470 {
1471 int byte_position;
1472 char byte_string[2] = "";
1473 int head_length;
1474 int tail_length;
1475
1476 byte_string[0] = (char) byte;
1477
1478 if (!_dbus_string_find (source, 0, byte_string, &byte_position))
1479 return FALSE;
1480
1481 head_length = byte_position;
1482 tail_length = _dbus_string_get_length (source) - head_length - 1;
1483
1484 if (!_dbus_string_move_len (source, byte_position + 1, tail_length,
1485 tail, 0))
1486 return FALSE;
1487
1488 /* remove the trailing delimiter byte from the head now.
1489 */
1490 if (!_dbus_string_set_length (source, head_length))
1491 return FALSE;
1492
1493 return TRUE;
1494 }
1495
1496 /* Unicode macros and utf8_validate() from GLib Owen Taylor, Havoc
1497 * Pennington, and Tom Tromey are the authors and authorized relicense.
1498 */
1499
1505 #define UTF8_COMPUTE(Char, Mask, Len) \
1506 if (Char < 128) \
1507 { \
1508 Len = 1; \
1509 Mask = 0x7f; \
1510 } \
1511 else if ((Char & 0xe0) == 0xc0) \
1512 { \
1513 Len = 2; \
1514 Mask = 0x1f; \
1515 } \
1516 else if ((Char & 0xf0) == 0xe0) \
1517 { \
1518 Len = 3; \
1519 Mask = 0x0f; \
1520 } \
1521 else if ((Char & 0xf8) == 0xf0) \
1522 { \
1523 Len = 4; \
1524 Mask = 0x07; \
1525 } \
1526 else if ((Char & 0xfc) == 0xf8) \
1527 { \
1528 Len = 5; \
1529 Mask = 0x03; \
1530 } \
1531 else if ((Char & 0xfe) == 0xfc) \
1532 { \
1533 Len = 6; \
1534 Mask = 0x01; \
1535 } \
1536 else \
1537 { \
1538 Len = 0; \
1539 Mask = 0; \
1540 }
1541
1546 #define UTF8_LENGTH(Char) \
1547 ((Char) < 0x80 ? 1 : \
1548 ((Char) < 0x800 ? 2 : \
1549 ((Char) < 0x10000 ? 3 : \
1550 ((Char) < 0x200000 ? 4 : \
1551 ((Char) < 0x4000000 ? 5 : 6)))))
1552
1562 #define UTF8_GET(Result, Chars, Count, Mask, Len) \
1563 (Result) = (Chars)[0] & (Mask); \
1564 for ((Count) = 1; (Count) < (Len); ++(Count)) \
1565 { \
1566 if (((Chars)[(Count)] & 0xc0) != 0x80) \
1567 { \
1568 (Result) = -1; \
1569 break; \
1570 } \
1571 (Result) <<= 6; \
1572 (Result) |= ((Chars)[(Count)] & 0x3f); \
1573 }
1574
1585 #define UNICODE_VALID(Char) \
1586 ((Char) < 0x110000 && \
1587 (((Char) & 0xFFFFF800) != 0xD800))
1588
1603 dbus_bool_t
1604 _dbus_string_find (const DBusString *str,
1605 int start,
1606 const char *substr,
1607 int *found)
1608 {
1609 return _dbus_string_find_to (str, start,
1610 ((const DBusRealString*)str)->len,
1611 substr, found);
1612 }
1613
1626 dbus_bool_t
1627 _dbus_string_find_eol (const DBusString *str,
1628 int start,
1629 int *found,
1630 int *found_len)
1631 {
1632 int i;
1633
1634 DBUS_CONST_STRING_PREAMBLE (str);
1635 _dbus_assert (start <= real->len);
1636 _dbus_assert (start >= 0);
1637
1638 i = start;
1639 while (i < real->len)
1640 {
1641 if (real->str[i] == '\r')
1642 {
1643 if ((i+1) < real->len && real->str[i+1] == '\n') /* "\r\n" */
1644 {
1645 if (found)
1646 *found = i;
1647 if (found_len)
1648 *found_len = 2;
1649 return TRUE;
1650 }
1651 else /* only "\r" */
1652 {
1653 if (found)
1654 *found = i;
1655 if (found_len)
1656 *found_len = 1;
1657 return TRUE;
1658 }
1659 }
1660 else if (real->str[i] == '\n') /* only "\n" */
1661 {
1662 if (found)
1663 *found = i;
1664 if (found_len)
1665 *found_len = 1;
1666 return TRUE;
1667 }
1668 ++i;
1669 }
1670
1671 if (found)
1672 *found = real->len;
1673
1674 if (found_len)
1675 *found_len = 0;
1676
1677 return FALSE;
1678 }
1679
1696 dbus_bool_t
1697 _dbus_string_find_to (const DBusString *str,
1698 int start,
1699 int end,
1700 const char *substr,
1701 int *found)
1702 {
1703 int i;
1704 DBUS_CONST_STRING_PREAMBLE (str);
1705 _dbus_assert (substr != NULL);
1706 _dbus_assert (start <= real->len);
1707 _dbus_assert (start >= 0);
1708 _dbus_assert (substr != NULL);
1709 _dbus_assert (end <= real->len);
1710 _dbus_assert (start <= end);
1711
1712 /* we always "find" an empty string */
1713 if (*substr == '\0')
1714 {
1715 if (found)
1716 *found = start;
1717 return TRUE;
1718 }
1719
1720 i = start;
1721 while (i < end)
1722 {
1723 if (real->str[i] == substr[0])
1724 {
1725 int j = i + 1;
1726
1727 while (j < end)
1728 {
1729 if (substr[j - i] == '\0')
1730 break;
1731 else if (real->str[j] != substr[j - i])
1732 break;
1733
1734 ++j;
1735 }
1736
1737 if (substr[j - i] == '\0')
1738 {
1739 if (found)
1740 *found = i;
1741 return TRUE;
1742 }
1743 }
1744
1745 ++i;
1746 }
1747
1748 if (found)
1749 *found = end;
1750
1751 return FALSE;
1752 }
1753
1764 dbus_bool_t
1765 _dbus_string_find_blank (const DBusString *str,
1766 int start,
1767 int *found)
1768 {
1769 int i;
1770 DBUS_CONST_STRING_PREAMBLE (str);
1771 _dbus_assert (start <= real->len);
1772 _dbus_assert (start >= 0);
1773
1774 i = start;
1775 while (i < real->len)
1776 {
1777 if (real->str[i] == ' ' ||
1778 real->str[i] == '\t')
1779 {
1780 if (found)
1781 *found = i;
1782 return TRUE;
1783 }
1784
1785 ++i;
1786 }
1787
1788 if (found)
1789 *found = real->len;
1790
1791 return FALSE;
1792 }
1793
1802 void
1803 _dbus_string_skip_blank (const DBusString *str,
1804 int start,
1805 int *end)
1806 {
1807 int i;
1808 DBUS_CONST_STRING_PREAMBLE (str);
1809 _dbus_assert (start <= real->len);
1810 _dbus_assert (start >= 0);
1811
1812 i = start;
1813 while (i < real->len)
1814 {
1815 if (!DBUS_IS_ASCII_BLANK (real->str[i]))
1816 break;
1817
1818 ++i;
1819 }
1820
1821 _dbus_assert (i == real->len || !DBUS_IS_ASCII_WHITE (real->str[i]));
1822
1823 if (end)
1824 *end = i;
1825 }
1826
1827
1836 void
1837 _dbus_string_skip_white (const DBusString *str,
1838 int start,
1839 int *end)
1840 {
1841 int i;
1842 DBUS_CONST_STRING_PREAMBLE (str);
1843 _dbus_assert (start <= real->len);
1844 _dbus_assert (start >= 0);
1845
1846 i = start;
1847 while (i < real->len)
1848 {
1849 if (!DBUS_IS_ASCII_WHITE (real->str[i]))
1850 break;
1851
1852 ++i;
1853 }
1854
1855 _dbus_assert (i == real->len || !(DBUS_IS_ASCII_WHITE (real->str[i])));
1856
1857 if (end)
1858 *end = i;
1859 }
1860
1869 void
1870 _dbus_string_skip_white_reverse (const DBusString *str,
1871 int end,
1872 int *start)
1873 {
1874 int i;
1875 DBUS_CONST_STRING_PREAMBLE (str);
1876 _dbus_assert (end <= real->len);
1877 _dbus_assert (end >= 0);
1878
1879 i = end;
1880 while (i > 0)
1881 {
1882 if (!DBUS_IS_ASCII_WHITE (real->str[i-1]))
1883 break;
1884 --i;
1885 }
1886
1887 _dbus_assert (i >= 0 && (i == 0 || !(DBUS_IS_ASCII_WHITE (real->str[i-1]))));
1888
1889 if (start)
1890 *start = i;
1891 }
1892
1908 dbus_bool_t
1909 _dbus_string_pop_line (DBusString *source,
1910 DBusString *dest)
1911 {
1912 int eol, eol_len;
1913
1914 _dbus_string_set_length (dest, 0);
1915
1916 eol = 0;
1917 eol_len = 0;
1918 if (!_dbus_string_find_eol (source, 0, &eol, &eol_len))
1919 {
1920 _dbus_assert (eol == _dbus_string_get_length (source));
1921 if (eol == 0)
1922 {
1923 /* If there's no newline and source has zero length, we're done */
1924 return FALSE;
1925 }
1926 /* otherwise, the last line of the file has no eol characters */
1927 }
1928
1929 /* remember eol can be 0 if it's an empty line, but eol_len should not be zero also
1930 * since find_eol returned TRUE
1931 */
1932
1933 if (!_dbus_string_move_len (source, 0, eol + eol_len, dest, 0))
1934 return FALSE;
1935
1936 /* remove line ending */
1937 if (!_dbus_string_set_length (dest, eol))
1938 {
1939 _dbus_assert_not_reached ("out of memory when shortening a string");
1940 return FALSE;
1941 }
1942
1943 return TRUE;
1944 }
1945
1946 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
1947
1953 void
1954 _dbus_string_delete_first_word (DBusString *str)
1955 {
1956 int i;
1957
1958 if (_dbus_string_find_blank (str, 0, &i))
1959 _dbus_string_skip_blank (str, i, &i);
1960
1961 _dbus_string_delete (str, 0, i);
1962 }
1963 #endif
1964
1965 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
1966
1971 void
1972 _dbus_string_delete_leading_blanks (DBusString *str)
1973 {
1974 int i;
1975
1976 _dbus_string_skip_blank (str, 0, &i);
1977
1978 if (i > 0)
1979 _dbus_string_delete (str, 0, i);
1980 }
1981 #endif
1982
1988 void
1989 _dbus_string_chop_white(DBusString *str)
1990 {
1991 int i;
1992
1993 _dbus_string_skip_white (str, 0, &i);
1994
1995 if (i > 0)
1996 _dbus_string_delete (str, 0, i);
1997
1998 _dbus_string_skip_white_reverse (str, _dbus_string_get_length (str), &i);
1999
2000 _dbus_string_set_length (str, i);
2001 }
2002
2012 dbus_bool_t
2013 _dbus_string_equal (const DBusString *a,
2014 const DBusString *b)
2015 {
2016 const unsigned char *ap;
2017 const unsigned char *bp;
2018 const unsigned char *a_end;
2019 const DBusRealString *real_a = (const DBusRealString*) a;
2020 const DBusRealString *real_b = (const DBusRealString*) b;
2021 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2022 DBUS_GENERIC_STRING_PREAMBLE (real_b);
2023
2024 if (real_a->len != real_b->len)
2025 return FALSE;
2026
2027 ap = real_a->str;
2028 bp = real_b->str;
2029 a_end = real_a->str + real_a->len;
2030 while (ap != a_end)
2031 {
2032 if (*ap != *bp)
2033 return FALSE;
2034
2035 ++ap;
2036 ++bp;
2037 }
2038
2039 return TRUE;
2040 }
2041
2055 dbus_bool_t
2056 _dbus_string_equal_len (const DBusString *a,
2057 const DBusString *b,
2058 int len)
2059 {
2060 const unsigned char *ap;
2061 const unsigned char *bp;
2062 const unsigned char *a_end;
2063 const DBusRealString *real_a = (const DBusRealString*) a;
2064 const DBusRealString *real_b = (const DBusRealString*) b;
2065 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2066 DBUS_GENERIC_STRING_PREAMBLE (real_b);
2067
2068 if (real_a->len != real_b->len &&
2069 (real_a->len < len || real_b->len < len))
2070 return FALSE;
2071
2072 ap = real_a->str;
2073 bp = real_b->str;
2074 a_end = real_a->str + MIN (real_a->len, len);
2075 while (ap != a_end)
2076 {
2077 if (*ap != *bp)
2078 return FALSE;
2079
2080 ++ap;
2081 ++bp;
2082 }
2083
2084 return TRUE;
2085 }
2086
2103 dbus_bool_t
2104 _dbus_string_equal_substring (const DBusString *a,
2105 int a_start,
2106 int a_len,
2107 const DBusString *b,
2108 int b_start)
2109 {
2110 const unsigned char *ap;
2111 const unsigned char *bp;
2112 const unsigned char *a_end;
2113 const DBusRealString *real_a = (const DBusRealString*) a;
2114 const DBusRealString *real_b = (const DBusRealString*) b;
2115 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2116 DBUS_GENERIC_STRING_PREAMBLE (real_b);
2117 _dbus_assert (a_start >= 0);
2118 _dbus_assert (a_len >= 0);
2119 _dbus_assert (a_start <= real_a->len);
2120 _dbus_assert (a_len <= real_a->len - a_start);
2121 _dbus_assert (b_start >= 0);
2122 _dbus_assert (b_start <= real_b->len);
2123
2124 if (a_len > real_b->len - b_start)
2125 return FALSE;
2126
2127 ap = real_a->str + a_start;
2128 bp = real_b->str + b_start;
2129 a_end = ap + a_len;
2130 while (ap != a_end)
2131 {
2132 if (*ap != *bp)
2133 return FALSE;
2134
2135 ++ap;
2136 ++bp;
2137 }
2138
2139 _dbus_assert (bp <= (real_b->str + real_b->len));
2140
2141 return TRUE;
2142 }
2143
2151 dbus_bool_t
2152 _dbus_string_equal_c_str (const DBusString *a,
2153 const char *c_str)
2154 {
2155 const unsigned char *ap;
2156 const unsigned char *bp;
2157 const unsigned char *a_end;
2158 const DBusRealString *real_a = (const DBusRealString*) a;
2159 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2160 _dbus_assert (c_str != NULL);
2161
2162 ap = real_a->str;
2163 bp = (const unsigned char*) c_str;
2164 a_end = real_a->str + real_a->len;
2165 while (ap != a_end && *bp)
2166 {
2167 if (*ap != *bp)
2168 return FALSE;
2169
2170 ++ap;
2171 ++bp;
2172 }
2173
2174 if (ap != a_end || *bp)
2175 return FALSE;
2176
2177 return TRUE;
2178 }
2179
2187 dbus_bool_t
2188 _dbus_string_starts_with_c_str (const DBusString *a,
2189 const char *c_str)
2190 {
2191 const unsigned char *ap;
2192 const unsigned char *bp;
2193 const unsigned char *a_end;
2194 const DBusRealString *real_a = (const DBusRealString*) a;
2195 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2196 _dbus_assert (c_str != NULL);
2197
2198 ap = real_a->str;
2199 bp = (const unsigned char*) c_str;
2200 a_end = real_a->str + real_a->len;
2201 while (ap != a_end && *bp)
2202 {
2203 if (*ap != *bp)
2204 return FALSE;
2205
2206 ++ap;
2207 ++bp;
2208 }
2209
2210 if (*bp == '\0')
2211 return TRUE;
2212 else
2213 return FALSE;
2214 }
2215
2224 dbus_bool_t
2225 _dbus_string_append_byte_as_hex (DBusString *str,
2226 unsigned char byte)
2227 {
2228 const char hexdigits[16] = {
2229 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
2230 'a', 'b', 'c', 'd', 'e', 'f'
2231 };
2232
2233 if (!_dbus_string_append_byte (str,
2234 hexdigits[(byte >> 4)]))
2235 return FALSE;
2236
2237 if (!_dbus_string_append_byte (str,
2238 hexdigits[(byte & 0x0f)]))
2239 {
2240 _dbus_string_set_length (str,
2241 _dbus_string_get_length (str) - 1);
2242 return FALSE;
2243 }
2244
2245 return TRUE;
2246 }
2247
2258 dbus_bool_t
2259 _dbus_string_hex_encode (const DBusString *source,
2260 int start,
2261 DBusString *dest,
2262 int insert_at)
2263 {
2264 DBusString result;
2265 const unsigned char *p;
2266 const unsigned char *end;
2267 dbus_bool_t retval;
2268
2269 _dbus_assert (start <= _dbus_string_get_length (source));
2270
2271 if (!_dbus_string_init (&result))
2272 return FALSE;
2273
2274 retval = FALSE;
2275
2276 p = (const unsigned char*) _dbus_string_get_const_data (source);
2277 end = p + _dbus_string_get_length (source);
2278 p += start;
2279
2280 while (p != end)
2281 {
2282 if (!_dbus_string_append_byte_as_hex (&result, *p))
2283 goto out;
2284
2285 ++p;
2286 }
2287
2288 if (!_dbus_string_move (&result, 0, dest, insert_at))
2289 goto out;
2290
2291 retval = TRUE;
2292
2293 out:
2294 _dbus_string_free (&result);
2295 return retval;
2296 }
2297
2308 dbus_bool_t
2309 _dbus_string_hex_decode (const DBusString *source,
2310 int start,
2311 int *end_return,
2312 DBusString *dest,
2313 int insert_at)
2314 {
2315 DBusString result;
2316 const unsigned char *p;
2317 const unsigned char *end;
2318 dbus_bool_t retval;
2319 dbus_bool_t high_bits;
2320
2321 _dbus_assert (start <= _dbus_string_get_length (source));
2322
2323 if (!_dbus_string_init (&result))
2324 return FALSE;
2325
2326 retval = FALSE;
2327
2328 high_bits = TRUE;
2329 p = (const unsigned char*) _dbus_string_get_const_data (source);
2330 end = p + _dbus_string_get_length (source);
2331 p += start;
2332
2333 while (p != end)
2334 {
2335 unsigned int val;
2336
2337 switch (*p)
2338 {
2339 case '0':
2340 val = 0;
2341 break;
2342 case '1':
2343 val = 1;
2344 break;
2345 case '2':
2346 val = 2;
2347 break;
2348 case '3':
2349 val = 3;
2350 break;
2351 case '4':
2352 val = 4;
2353 break;
2354 case '5':
2355 val = 5;
2356 break;
2357 case '6':
2358 val = 6;
2359 break;
2360 case '7':
2361 val = 7;
2362 break;
2363 case '8':
2364 val = 8;
2365 break;
2366 case '9':
2367 val = 9;
2368 break;
2369 case 'a':
2370 case 'A':
2371 val = 10;
2372 break;
2373 case 'b':
2374 case 'B':
2375 val = 11;
2376 break;
2377 case 'c':
2378 case 'C':
2379 val = 12;
2380 break;
2381 case 'd':
2382 case 'D':
2383 val = 13;
2384 break;
2385 case 'e':
2386 case 'E':
2387 val = 14;
2388 break;
2389 case 'f':
2390 case 'F':
2391 val = 15;
2392 break;
2393 default:
2394 goto done;
2395 }
2396
2397 if (high_bits)
2398 {
2399 if (!_dbus_string_append_byte (&result,
2400 val << 4))
2401 goto out;
2402 }
2403 else
2404 {
2405 int len;
2406 unsigned char b;
2407
2408 len = _dbus_string_get_length (&result);
2409
2410 b = _dbus_string_get_byte (&result, len - 1);
2411
2412 b |= val;
2413
2414 _dbus_string_set_byte (&result, len - 1, b);
2415 }
2416
2417 high_bits = !high_bits;
2418
2419 ++p;
2420 }
2421
2422 done:
2423 if (!_dbus_string_move (&result, 0, dest, insert_at))
2424 goto out;
2425
2426 if (end_return)
2427 *end_return = p - (const unsigned char*) _dbus_string_get_const_data (source);
2428
2429 retval = TRUE;
2430
2431 out:
2432 _dbus_string_free (&result);
2433 return retval;
2434 }
2435
2449 dbus_bool_t
2450 _dbus_string_validate_ascii (const DBusString *str,
2451 int start,
2452 int len)
2453 {
2454 const unsigned char *s;
2455 const unsigned char *end;
2456 DBUS_CONST_STRING_PREAMBLE (str);
2457 _dbus_assert (start >= 0);
2458 _dbus_assert (start <= real->len);
2459 _dbus_assert (len >= 0);
2460
2461 if (len > real->len - start)
2462 return FALSE;
2463
2464 s = real->str + start;
2465 end = s + len;
2466 while (s != end)
2467 {
2468 if (_DBUS_UNLIKELY (!_DBUS_ISASCII (*s)))
2469 return FALSE;
2470
2471 ++s;
2472 }
2473
2474 return TRUE;
2475 }
2476
2484 void
2485 _dbus_string_tolower_ascii (const DBusString *str,
2486 int start,
2487 int len)
2488 {
2489 unsigned char *s;
2490 unsigned char *end;
2491 DBUS_STRING_PREAMBLE (str);
2492 _dbus_assert (start >= 0);
2493 _dbus_assert (start <= real->len);
2494 _dbus_assert (len >= 0);
2495 _dbus_assert (len <= real->len - start);
2496
2497 s = real->str + start;
2498 end = s + len;
2499
2500 while (s != end)
2501 {
2502 if (*s >= 'A' && *s <= 'Z')
2503 *s += 'a' - 'A';
2504 ++s;
2505 }
2506 }
2507
2515 void
2516 _dbus_string_toupper_ascii (const DBusString *str,
2517 int start,
2518 int len)
2519 {
2520 unsigned char *s;
2521 unsigned char *end;
2522 DBUS_STRING_PREAMBLE (str);
2523 _dbus_assert (start >= 0);
2524 _dbus_assert (start <= real->len);
2525 _dbus_assert (len >= 0);
2526 _dbus_assert (len <= real->len - start);
2527
2528 s = real->str + start;
2529 end = s + len;
2530
2531 while (s != end)
2532 {
2533 if (*s >= 'a' && *s <= 'z')
2534 *s += 'A' - 'a';
2535 ++s;
2536 }
2537 }
2538
2554 dbus_bool_t
2555 _dbus_string_validate_utf8 (const DBusString *str,
2556 int start,
2557 int len)
2558 {
2559 const unsigned char *p;
2560 const unsigned char *end;
2561 DBUS_CONST_STRING_PREAMBLE (str);
2562 _dbus_assert (start >= 0);
2563 _dbus_assert (start <= real->len);
2564 _dbus_assert (len >= 0);
2565
2566 /* we are doing _DBUS_UNLIKELY() here which might be
2567 * dubious in a generic library like GLib, but in D-Bus
2568 * we know we're validating messages and that it would
2569 * only be evil/broken apps that would have invalid
2570 * UTF-8. Also, this function seems to be a performance
2571 * bottleneck in profiles.
2572 */
2573
2574 if (_DBUS_UNLIKELY (len > real->len - start))
2575 return FALSE;
2576
2577 p = real->str + start;
2578 end = p + len;
2579
2580 while (p < end)
2581 {
2582 int i, mask, char_len;
2583 dbus_unichar_t result;
2584
2585 /* nul bytes considered invalid */
2586 if (*p == '\0')
2587 break;
2588
2589 /* Special-case ASCII; this makes us go a lot faster in
2590 * D-Bus profiles where we are typically validating
2591 * function names and such. We have to know that
2592 * all following checks will pass for ASCII though,
2593 * comments follow ...
2594 */
2595 if (*p < 128)
2596 {
2597 ++p;
2598 continue;
2599 }
2600
2601 UTF8_COMPUTE (*p, mask, char_len);
2602
2603 if (_DBUS_UNLIKELY (char_len == 0)) /* ASCII: char_len == 1 */
2604 break;
2605
2606 /* check that the expected number of bytes exists in the remaining length */
2607 if (_DBUS_UNLIKELY ((end - p) < char_len)) /* ASCII: p < end and char_len == 1 */
2608 break;
2609
2610 UTF8_GET (result, p, i, mask, char_len);
2611
2612 /* Check for overlong UTF-8 */
2613 if (_DBUS_UNLIKELY (UTF8_LENGTH (result) != char_len)) /* ASCII: UTF8_LENGTH == 1 */
2614 break;
2615 #if 0
2616 /* The UNICODE_VALID check below will catch this */
2617 if (_DBUS_UNLIKELY (result == (dbus_unichar_t)-1)) /* ASCII: result = ascii value */
2618 break;
2619 #endif
2620
2621 if (_DBUS_UNLIKELY (!UNICODE_VALID (result))) /* ASCII: always valid */
2622 break;
2623
2624 /* UNICODE_VALID should have caught it */
2625 _dbus_assert (result != (dbus_unichar_t)-1);
2626
2627 p += char_len;
2628 }
2629
2630 /* See that we covered the entire length if a length was
2631 * passed in
2632 */
2633 if (_DBUS_UNLIKELY (p != end))
2634 return FALSE;
2635 else
2636 return TRUE;
2637 }
2638
2652 dbus_bool_t
2653 _dbus_string_validate_nul (const DBusString *str,
2654 int start,
2655 int len)
2656 {
2657 const unsigned char *s;
2658 const unsigned char *end;
2659 DBUS_CONST_STRING_PREAMBLE (str);
2660 _dbus_assert (start >= 0);
2661 _dbus_assert (len >= 0);
2662 _dbus_assert (start <= real->len);
2663
2664 if (len > real->len - start)
2665 return FALSE;
2666
2667 s = real->str + start;
2668 end = s + len;
2669 while (s != end)
2670 {
2671 if (_DBUS_UNLIKELY (*s != '\0'))
2672 return FALSE;
2673 ++s;
2674 }
2675
2676 return TRUE;
2677 }
2678
2684 void
2685 _dbus_string_zero (DBusString *str)
2686 {
2687 DBUS_STRING_PREAMBLE (str);
2688
2689 memset (real->str - real->align_offset, '\0', real->allocated);
2690 }
2693 /* tests are in dbus-string-util.c */
DBUS_IS_ASCII_WHITE
#define DBUS_IS_ASCII_WHITE(c)
Checks for ASCII whitespace byte.
Definition: dbus-string-private.h:127
_dbus_string_insert_bytes
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:584
_dbus_string_append
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:935
_dbus_string_copy_to_buffer
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:697
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
DBUS_STRING_COPY_PREAMBLE
#define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at)
Checks assertions for two strings we're copying a segment between, and declares real_source/real_dest...
Definition: dbus-string.c:1235
DBusRealString
Internals of DBusString.
Definition: dbus-string-private.h:43
_dbus_string_equal
dbus_bool_t _dbus_string_equal(const DBusString *a, const DBusString *b)
Tests two DBusString for equality.
Definition: dbus-string.c:2013
_dbus_string_find_eol
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:1627
_dbus_string_lengthen
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:760
ASSIGN_4_OCTETS
#define ASSIGN_4_OCTETS(p, octets)
assign 4 bytes from one string to another
Definition: dbus-string.c:955
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:702
_dbus_string_copy_to_buffer_with_nul
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:719
_dbus_string_hex_encode
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:2259
ASSIGN_8_OCTETS
#define ASSIGN_8_OCTETS(p, octets)
assign 8 bytes from one string to another
Definition: dbus-string.c:959
_dbus_string_starts_with_c_str
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:2188
_dbus_string_chop_white
void _dbus_string_chop_white(DBusString *str)
Deletes leading and trailing whitespace.
Definition: dbus-string.c:1989
_dbus_string_insert_8_aligned
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:1020
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition: dbus-internals.h:152
_dbus_string_tolower_ascii
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:2485
DBusRealString::invalid
unsigned int invalid
DBusString is invalid (e.g.
Definition: dbus-string-private.h:50
DBUS_CONST_STRING_PREAMBLE
#define DBUS_CONST_STRING_PREAMBLE(str)
Checks assertions about a string that may be const or locked.
Definition: dbus-string-private.h:114
_dbus_string_get_data_len
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:490
_DBUS_STRING_MAX_LENGTH
#define _DBUS_STRING_MAX_LENGTH
The maximum length of a DBusString.
Definition: dbus-string-private.h:69
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
_dbus_string_append_printf_valist
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:1072
_dbus_string_shorten
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes.
Definition: dbus-string.c:780
_dbus_string_copy
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's copied to the d...
Definition: dbus-string.c:1283
UTF8_GET
#define UTF8_GET(Result, Chars, Count, Mask, Len)
Gets a UTF-8 value.
Definition: dbus-string.c:1562
_dbus_string_find
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:1604
_dbus_string_skip_white
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:1837
ASSIGN_2_OCTETS
#define ASSIGN_2_OCTETS(p, octets)
assign 2 bytes from one string to another
Definition: dbus-string.c:951
_dbus_string_move
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:1259
dbus_malloc
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
Definition: dbus-memory.c:462
UNICODE_VALID
#define UNICODE_VALID(Char)
Check whether a Unicode (5.2) char is in a valid range.
Definition: dbus-string.c:1585
_dbus_string_equal_c_str
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:2152
_dbus_string_compact
dbus_bool_t _dbus_string_compact(DBusString *str, int max_waste)
Compacts the string to avoid wasted memory.
Definition: dbus-string.c:389
_dbus_string_copy_data
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:672
DBusString
Definition: dbus-string.h:42
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
_dbus_string_init_const
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:190
DBUS_GENERIC_STRING_PREAMBLE
#define DBUS_GENERIC_STRING_PREAMBLE(real)
Checks a bunch of assertions about a string object.
Definition: dbus-string-private.h:76
_dbus_string_replace_len
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:1404
DBUS_STRING_PREAMBLE
#define DBUS_STRING_PREAMBLE(str)
Checks assertions about a string object that needs to be modifiable - may not be locked or const.
Definition: dbus-string-private.h:93
_dbus_string_skip_blank
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:1803
UTF8_LENGTH
#define UTF8_LENGTH(Char)
computes length of a unicode character in UTF-8
Definition: dbus-string.c:1546
_dbus_string_pop_line
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:1909
_dbus_string_delete
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:1193
_dbus_string_init_preallocated
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:132
DBusRealString::len
int len
Length without nul.
Definition: dbus-string-private.h:46
_dbus_string_append_printf
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:1114
_dbus_string_zero
void _dbus_string_zero(DBusString *str)
Clears all allocated bytes in the string to zero.
Definition: dbus-string.c:2685
_dbus_string_validate_utf8
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:2555
_dbus_string_align_length
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:883
_dbus_string_equal_substring
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:2104
_dbus_string_equal_len
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:2056
DBusRealString::locked
unsigned int locked
DBusString has been locked and can't be changed.
Definition: dbus-string-private.h:49
_dbus_string_init_from_string
dbus_bool_t _dbus_string_init_from_string(DBusString *str, const DBusString *from)
Initializes a string from another string.
Definition: dbus-string.c:245
_dbus_string_insert_byte
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:614
_dbus_string_append_byte
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:1157
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
TRUE
#define TRUE
Expands to "1".
_dbus_assert_not_reached
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
Definition: dbus-internals.h:163
DBusRealString::allocated
int allocated
Allocated size of data.
Definition: dbus-string-private.h:47
DBUS_IS_ASCII_BLANK
#define DBUS_IS_ASCII_BLANK(c)
Checks for ASCII blank byte.
Definition: dbus-string-private.h:121
_dbus_string_find_blank
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:1765
_dbus_string_alloc_space
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:899
_dbus_string_hex_decode
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:2309
DBusRealString::align_offset
unsigned int align_offset
str - align_offset is the actual malloc block
Definition: dbus-string-private.h:51
_dbus_string_append_byte_as_hex
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:2225
_dbus_string_append_len
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:1137
_dbus_string_find_to
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:1697
DBusRealString::str
unsigned char * str
String data, plus nul termination.
Definition: dbus-string-private.h:45
_dbus_string_validate_nul
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:2653
FALSE
#define FALSE
Expands to "0".
_dbus_string_insert_4_aligned
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:996
_dbus_string_skip_white_reverse
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:1870
DBUS_LOCKED_STRING_PREAMBLE
#define DBUS_LOCKED_STRING_PREAMBLE(str)
Checks assertions about a string object that may be locked but can't be const.
Definition: dbus-string-private.h:105
_dbus_string_set_length
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:802
_dbus_string_insert_2_aligned
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:972
_dbus_string_copy_len
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:1375
_dbus_string_steal_data
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:641
dbus_realloc
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:602
_dbus_string_toupper_ascii
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:2516
_dbus_printf_string_upper_bound
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.
Definition: dbus-sysdeps-unix.c:3516
UTF8_COMPUTE
#define UTF8_COMPUTE(Char, Mask, Len)
computes length and mask of a unicode character
Definition: dbus-string.c:1505
_dbus_string_insert_alignment
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:1048
_dbus_string_validate_ascii
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:2450
_dbus_string_init_const_len
void _dbus_string_init_const_len(DBusString *str, const char *value, int len)
Initializes a constant string with a length.
Definition: dbus-string.c:210
_dbus_string_move_len
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:1308
DBusRealString::constant
unsigned int constant
String data is not owned by DBusString.
Definition: dbus-string-private.h:48
_dbus_string_split_on_byte
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:1467