1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-string.c String utility class (internal to D-BUS implementation)
4 * Copyright (C) 2002, 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 1.2
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "dbus-internals.h"
25 #include "dbus-string.h"
26 /* we allow a system header here, for speed/convenience */
30 #include "dbus-marshal.h"
31 #define DBUS_CAN_USE_DBUS_STRING_PRIVATE 1
32 #include "dbus-string-private.h"
33 #include "dbus-protocol.h"
36 * @defgroup DBusString string class
37 * @ingroup DBusInternals
38 * @brief DBusString data structure
40 * Types and functions related to DBusString. DBusString is intended
41 * to be a string class that makes it hard to mess up security issues
42 * (and just in general harder to write buggy code). It should be
43 * used (or extended and then used) rather than the libc stuff in
44 * string.h. The string class is a bit inconvenient at spots because
45 * it handles out-of-memory failures and tries to be extra-robust.
47 * A DBusString has a maximum length set at initialization time; this
48 * can be used to ensure that a buffer doesn't get too big. The
49 * _dbus_string_lengthen() method checks for overflow, and for max
50 * length being exceeded.
52 * Try to avoid conversion to a plain C string, i.e. add methods on
53 * the string object instead, only convert to C string when passing
54 * things out to the public API. In particular, no sprintf, strcpy,
55 * strcat, any of that should be used. The GString feature of
56 * accepting negative numbers for "length of string" is also absent,
57 * because it could keep us from detecting bogus huge lengths. i.e. if
58 * we passed in some bogus huge length it would be taken to mean
59 * "current length of string" instead of "broken crack"
63 * @defgroup DBusStringInternals DBusString implementation details
64 * @ingroup DBusInternals
65 * @brief DBusString implementation details
67 * The guts of DBusString.
73 * We allocate 1 byte for nul termination, plus 7 bytes for possible
74 * align_offset, so we always need 8 bytes on top of the string's
75 * length to be in the allocated block.
77 #define ALLOCATION_PADDING 8
80 * This is the maximum max length (and thus also the maximum length)
83 #define MAX_MAX_LENGTH (_DBUS_INT_MAX - ALLOCATION_PADDING)
86 * Checks a bunch of assertions about a string object
88 * @param real the DBusRealString
90 #define DBUS_GENERIC_STRING_PREAMBLE(real) _dbus_assert ((real) != NULL); _dbus_assert (!(real)->invalid); _dbus_assert ((real)->len >= 0); _dbus_assert ((real)->allocated >= 0); _dbus_assert ((real)->max_length >= 0); _dbus_assert ((real)->len <= ((real)->allocated - ALLOCATION_PADDING)); _dbus_assert ((real)->len <= (real)->max_length)
93 * Checks assertions about a string object that needs to be
94 * modifiable - may not be locked or const. Also declares
95 * the "real" variable pointing to DBusRealString.
96 * @param str the string
98 #define DBUS_STRING_PREAMBLE(str) DBusRealString *real = (DBusRealString*) str; \
99 DBUS_GENERIC_STRING_PREAMBLE (real); \
100 _dbus_assert (!(real)->constant); \
101 _dbus_assert (!(real)->locked)
104 * Checks assertions about a string object that may be locked but
105 * can't be const. i.e. a string object that we can free. Also
106 * declares the "real" variable pointing to DBusRealString.
108 * @param str the string
110 #define DBUS_LOCKED_STRING_PREAMBLE(str) DBusRealString *real = (DBusRealString*) str; \
111 DBUS_GENERIC_STRING_PREAMBLE (real); \
112 _dbus_assert (!(real)->constant)
115 * Checks assertions about a string that may be const or locked. Also
116 * declares the "real" variable pointing to DBusRealString.
117 * @param str the string.
119 #define DBUS_CONST_STRING_PREAMBLE(str) const DBusRealString *real = (DBusRealString*) str; \
120 DBUS_GENERIC_STRING_PREAMBLE (real)
125 * @addtogroup DBusString
130 fixup_alignment (DBusRealString *real)
134 unsigned int old_align_offset;
136 /* we have to have extra space in real->allocated for the align offset and nul byte */
137 _dbus_assert (real->len <= real->allocated - ALLOCATION_PADDING);
139 old_align_offset = real->align_offset;
140 real_block = real->str - old_align_offset;
142 aligned = _DBUS_ALIGN_ADDRESS (real_block, 8);
144 real->align_offset = aligned - real_block;
147 if (old_align_offset != real->align_offset)
149 /* Here comes the suck */
150 memmove (real_block + real->align_offset,
151 real_block + old_align_offset,
155 _dbus_assert (real->align_offset < 8);
156 _dbus_assert (_DBUS_ALIGN_ADDRESS (real->str, 8) == real->str);
160 undo_alignment (DBusRealString *real)
162 if (real->align_offset != 0)
164 memmove (real->str - real->align_offset,
168 real->str = real->str - real->align_offset;
169 real->align_offset = 0;
174 * Initializes a string that can be up to the given allocation size
175 * before it has to realloc. The string starts life with zero length.
176 * The string must eventually be freed with _dbus_string_free().
178 * @param str memory to hold the string
179 * @param allocate_size amount to preallocate
180 * @returns #TRUE on success, #FALSE if no memory
183 _dbus_string_init_preallocated (DBusString *str,
186 DBusRealString *real;
188 _dbus_assert (str != NULL);
190 _dbus_assert (sizeof (DBusString) == sizeof (DBusRealString));
192 real = (DBusRealString*) str;
194 /* It's very important not to touch anything
195 * other than real->str if we're going to fail,
196 * since we also use this function to reset
197 * an existing string, e.g. in _dbus_string_steal_data()
200 real->str = dbus_malloc (ALLOCATION_PADDING + allocate_size);
201 if (real->str == NULL)
204 real->allocated = ALLOCATION_PADDING + allocate_size;
206 real->str[real->len] = '\0';
208 real->max_length = MAX_MAX_LENGTH;
209 real->constant = FALSE;
210 real->locked = FALSE;
211 real->invalid = FALSE;
212 real->align_offset = 0;
214 fixup_alignment (real);
220 * Initializes a string. The string starts life with zero length. The
221 * string must eventually be freed with _dbus_string_free().
223 * @param str memory to hold the string
224 * @returns #TRUE on success, #FALSE if no memory
227 _dbus_string_init (DBusString *str)
229 return _dbus_string_init_preallocated (str, 0);
232 /* The max length thing is sort of a historical artifact
233 * from a feature that turned out to be dumb; perhaps
234 * we should purge it entirely. The problem with
235 * the feature is that it looks like memory allocation
236 * failure, but is not a transient or resolvable failure.
239 set_max_length (DBusString *str,
242 DBusRealString *real;
244 real = (DBusRealString*) str;
246 real->max_length = max_length;
250 * Initializes a constant string. The value parameter is not copied
251 * (should be static), and the string may never be modified.
252 * It is safe but not necessary to call _dbus_string_free()
253 * on a const string. The string has a length limit of MAXINT - 8.
255 * @param str memory to use for the string
256 * @param value a string to be stored in str (not copied!!!)
259 _dbus_string_init_const (DBusString *str,
262 _dbus_assert (value != NULL);
264 _dbus_string_init_const_len (str, value,
269 * Initializes a constant string with a length. The value parameter is
270 * not copied (should be static), and the string may never be
271 * modified. It is safe but not necessary to call _dbus_string_free()
274 * @param str memory to use for the string
275 * @param value a string to be stored in str (not copied!!!)
276 * @param len the length to use
279 _dbus_string_init_const_len (DBusString *str,
283 DBusRealString *real;
285 _dbus_assert (str != NULL);
286 _dbus_assert (value != NULL);
287 _dbus_assert (len <= MAX_MAX_LENGTH);
288 _dbus_assert (len >= 0);
290 real = (DBusRealString*) str;
292 real->str = (char*) value;
294 real->allocated = real->len + ALLOCATION_PADDING; /* a lie, just to avoid special-case assertions... */
295 real->max_length = real->len + 1;
296 real->constant = TRUE;
297 real->invalid = FALSE;
299 /* We don't require const strings to be 8-byte aligned as the
300 * memory is coming from elsewhere.
305 * Frees a string created by _dbus_string_init().
307 * @param str memory where the string is stored.
310 _dbus_string_free (DBusString *str)
312 DBusRealString *real = (DBusRealString*) str;
313 DBUS_GENERIC_STRING_PREAMBLE (real);
317 dbus_free (real->str - real->align_offset);
319 real->invalid = TRUE;
322 #ifdef DBUS_BUILD_TESTS
323 /* Not using this feature at the moment,
324 * so marked DBUS_BUILD_TESTS-only
327 * Locks a string such that any attempts to change the string will
328 * result in aborting the program. Also, if the string is wasting a
329 * lot of memory (allocation is sufficiently larger than what the
330 * string is really using), _dbus_string_lock() will realloc the
331 * string's data to "compact" it.
333 * @param str the string to lock.
336 _dbus_string_lock (DBusString *str)
338 DBUS_LOCKED_STRING_PREAMBLE (str); /* can lock multiple times */
342 /* Try to realloc to avoid excess memory usage, since
343 * we know we won't change the string further
346 if (real->allocated - MAX_WASTE > real->len)
351 new_allocated = real->len + ALLOCATION_PADDING;
353 new_str = dbus_realloc (real->str - real->align_offset,
357 real->str = new_str + real->align_offset;
358 real->allocated = new_allocated;
359 fixup_alignment (real);
363 #endif /* DBUS_BUILD_TESTS */
366 reallocate_for_length (DBusRealString *real,
372 /* at least double our old allocation to avoid O(n), avoiding
375 if (real->allocated > (MAX_MAX_LENGTH + ALLOCATION_PADDING) / 2)
376 new_allocated = MAX_MAX_LENGTH + ALLOCATION_PADDING;
378 new_allocated = real->allocated * 2;
380 /* if you change the code just above here, run the tests without
381 * the following before you commit
383 #ifdef DBUS_BUILD_TESTS
384 new_allocated = 0; /* ensure a realloc every time so that we go
385 * through all malloc failure codepaths
389 /* But be sure we always alloc at least space for the new length */
390 new_allocated = MAX (new_allocated, new_length + ALLOCATION_PADDING);
392 _dbus_assert (new_allocated >= real->allocated); /* code relies on this */
393 new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
397 real->str = new_str + real->align_offset;
398 real->allocated = new_allocated;
399 fixup_alignment (real);
405 set_length (DBusRealString *real,
408 /* Note, we are setting the length not including nul termination */
410 /* exceeding max length is the same as failure to allocate memory */
411 if (new_length > real->max_length)
413 else if (new_length > (real->allocated - ALLOCATION_PADDING) &&
414 !reallocate_for_length (real, new_length))
418 real->len = new_length;
419 real->str[real->len] = '\0';
426 DBusRealString *dest,
432 if (len > dest->max_length - dest->len)
433 return FALSE; /* detected overflow of dest->len + len below */
435 if (!set_length (dest, dest->len + len))
438 memmove (dest->str + insert_at + len,
439 dest->str + insert_at,
440 dest->len - len - insert_at);
446 * Gets the raw character buffer from the string. The returned buffer
447 * will be nul-terminated, but note that strings may contain binary
448 * data so there may be extra nul characters prior to the termination.
449 * This function should be little-used, extend DBusString or add
450 * stuff to dbus-sysdeps.c instead. It's an error to use this
451 * function on a const string.
453 * @param str the string
457 _dbus_string_get_data (DBusString *str)
459 DBUS_STRING_PREAMBLE (str);
465 * Gets the raw character buffer from a const string.
467 * @param str the string
468 * @returns the string data
471 _dbus_string_get_const_data (const DBusString *str)
473 DBUS_CONST_STRING_PREAMBLE (str);
479 * Gets a sub-portion of the raw character buffer from the
480 * string. The "len" field is required simply for error
481 * checking, to be sure you don't try to use more
482 * string than exists. The nul termination of the
483 * returned buffer remains at the end of the entire
484 * string, not at start + len.
486 * @param str the string
487 * @param start byte offset to return
488 * @param len length of segment to return
489 * @returns the string data
492 _dbus_string_get_data_len (DBusString *str,
496 DBUS_STRING_PREAMBLE (str);
497 _dbus_assert (start >= 0);
498 _dbus_assert (len >= 0);
499 _dbus_assert (start <= real->len);
500 _dbus_assert (len <= real->len - start);
502 return real->str + start;
506 * const version of _dbus_string_get_data_len().
508 * @param str the string
509 * @param start byte offset to return
510 * @param len length of segment to return
511 * @returns the string data
514 _dbus_string_get_const_data_len (const DBusString *str,
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);
524 return real->str + start;
528 * Sets the value of the byte at the given position.
530 * @param str the string
531 * @param i the position
532 * @param byte the new value
535 _dbus_string_set_byte (DBusString *str,
539 DBUS_STRING_PREAMBLE (str);
540 _dbus_assert (i < real->len);
541 _dbus_assert (i >= 0);
547 * Gets the byte at the given position. It is
548 * allowed to ask for the nul byte at the end of
551 * @param str the string
552 * @param start the position
553 * @returns the byte at that position
556 _dbus_string_get_byte (const DBusString *str,
559 DBUS_CONST_STRING_PREAMBLE (str);
560 _dbus_assert (start <= real->len);
561 _dbus_assert (start >= 0);
563 return real->str[start];
567 * Inserts a number of bytes of a given value at the
570 * @param str the string
571 * @param i the position
572 * @param n_bytes number of bytes
573 * @param byte the value to insert
574 * @returns #TRUE on success
577 _dbus_string_insert_bytes (DBusString *str,
582 DBUS_STRING_PREAMBLE (str);
583 _dbus_assert (i <= real->len);
584 _dbus_assert (i >= 0);
585 _dbus_assert (n_bytes > 0);
587 if (!open_gap (n_bytes, real, i))
590 memset (real->str + i, byte, n_bytes);
596 * Like _dbus_string_get_data(), but removes the
597 * gotten data from the original string. The caller
598 * must free the data returned. This function may
599 * fail due to lack of memory, and return #FALSE.
601 * @param str the string
602 * @param data_return location to return the buffer
603 * @returns #TRUE on success
606 _dbus_string_steal_data (DBusString *str,
610 DBUS_STRING_PREAMBLE (str);
611 _dbus_assert (data_return != NULL);
613 undo_alignment (real);
615 *data_return = real->str;
617 old_max_length = real->max_length;
619 /* reset the string */
620 if (!_dbus_string_init (str))
622 /* hrm, put it back then */
623 real->str = *data_return;
625 fixup_alignment (real);
629 real->max_length = old_max_length;
635 * Like _dbus_string_get_data_len(), but removes the gotten data from
636 * the original string. The caller must free the data returned. This
637 * function may fail due to lack of memory, and return #FALSE.
638 * The returned string is nul-terminated and has length len.
640 * @todo this function is broken because on failure it
641 * may corrupt the source string.
643 * @param str the string
644 * @param data_return location to return the buffer
645 * @param start the start of segment to steal
646 * @param len the length of segment to steal
647 * @returns #TRUE on success
650 _dbus_string_steal_data_len (DBusString *str,
656 DBUS_STRING_PREAMBLE (str);
657 _dbus_assert (data_return != NULL);
658 _dbus_assert (start >= 0);
659 _dbus_assert (len >= 0);
660 _dbus_assert (start <= real->len);
661 _dbus_assert (len <= real->len - start);
663 if (!_dbus_string_init (&dest))
666 set_max_length (&dest, real->max_length);
668 if (!_dbus_string_move_len (str, start, len, &dest, 0))
670 _dbus_string_free (&dest);
674 _dbus_warn ("Broken code in _dbus_string_steal_data_len(), see @todo, FIXME\n");
675 if (!_dbus_string_steal_data (&dest, data_return))
677 _dbus_string_free (&dest);
681 _dbus_string_free (&dest);
687 * Copies the data from the string into a char*
689 * @param str the string
690 * @param data_return place to return the data
691 * @returns #TRUE on success, #FALSE on no memory
694 _dbus_string_copy_data (const DBusString *str,
697 DBUS_CONST_STRING_PREAMBLE (str);
698 _dbus_assert (data_return != NULL);
700 *data_return = dbus_malloc (real->len + 1);
701 if (*data_return == NULL)
704 memcpy (*data_return, real->str, real->len + 1);
710 * Copies a segment of the string into a char*
712 * @param str the string
713 * @param data_return place to return the data
714 * @param start start index
715 * @param len length to copy
716 * @returns #FALSE if no memory
719 _dbus_string_copy_data_len (const DBusString *str,
726 DBUS_CONST_STRING_PREAMBLE (str);
727 _dbus_assert (data_return != NULL);
728 _dbus_assert (start >= 0);
729 _dbus_assert (len >= 0);
730 _dbus_assert (start <= real->len);
731 _dbus_assert (len <= real->len - start);
733 if (!_dbus_string_init (&dest))
736 set_max_length (&dest, real->max_length);
738 if (!_dbus_string_copy_len (str, start, len, &dest, 0))
740 _dbus_string_free (&dest);
744 if (!_dbus_string_steal_data (&dest, data_return))
746 _dbus_string_free (&dest);
750 _dbus_string_free (&dest);
755 * Gets the length of a string (not including nul termination).
757 * @returns the length.
760 _dbus_string_get_length (const DBusString *str)
762 DBUS_CONST_STRING_PREAMBLE (str);
768 * Makes a string longer by the given number of bytes. Checks whether
769 * adding additional_length to the current length would overflow an
770 * integer, and checks for exceeding a string's max length.
771 * The new bytes are not initialized, other than nul-terminating
772 * the end of the string. The uninitialized bytes may contain
773 * nul bytes or other junk.
775 * @param str a string
776 * @param additional_length length to add to the string.
777 * @returns #TRUE on success.
780 _dbus_string_lengthen (DBusString *str,
781 int additional_length)
783 DBUS_STRING_PREAMBLE (str);
784 _dbus_assert (additional_length >= 0);
786 if (additional_length > real->max_length - real->len)
787 return FALSE; /* would overflow */
789 return set_length (real,
790 real->len + additional_length);
794 * Makes a string shorter by the given number of bytes.
796 * @param str a string
797 * @param length_to_remove length to remove from the string.
800 _dbus_string_shorten (DBusString *str,
801 int length_to_remove)
803 DBUS_STRING_PREAMBLE (str);
804 _dbus_assert (length_to_remove >= 0);
805 _dbus_assert (length_to_remove <= real->len);
808 real->len - length_to_remove);
812 * Sets the length of a string. Can be used to truncate or lengthen
813 * the string. If the string is lengthened, the function may fail and
814 * return #FALSE. Newly-added bytes are not initialized, as with
815 * _dbus_string_lengthen().
817 * @param str a string
818 * @param length new length of the string.
819 * @returns #FALSE on failure.
822 _dbus_string_set_length (DBusString *str,
825 DBUS_STRING_PREAMBLE (str);
826 _dbus_assert (length >= 0);
828 return set_length (real, length);
832 align_length_then_lengthen (DBusString *str,
834 int then_lengthen_by)
836 unsigned long new_len; /* ulong to avoid _DBUS_ALIGN_VALUE overflow */
838 DBUS_STRING_PREAMBLE (str);
839 _dbus_assert (alignment >= 1);
840 _dbus_assert (alignment <= 8); /* it has to be a bug if > 8 */
842 new_len = _DBUS_ALIGN_VALUE (real->len, alignment);
843 if (new_len > (unsigned long) real->max_length - then_lengthen_by)
845 new_len += then_lengthen_by;
847 delta = new_len - real->len;
848 _dbus_assert (delta >= 0);
853 if (!set_length (real, new_len))
856 /* delta == padding + then_lengthen_by
857 * new_len == old_len + padding + then_lengthen_by
859 if (then_lengthen_by < delta)
863 while (i < (new_len - then_lengthen_by))
874 * Align the length of a string to a specific alignment (typically 4 or 8)
875 * by appending nul bytes to the string.
877 * @param str a string
878 * @param alignment the alignment
879 * @returns #FALSE if no memory
882 _dbus_string_align_length (DBusString *str,
885 return align_length_then_lengthen (str, alignment, 0);
889 append (DBusRealString *real,
896 if (!_dbus_string_lengthen ((DBusString*)real, buffer_len))
899 memcpy (real->str + (real->len - buffer_len),
907 * Appends a nul-terminated C-style string to a DBusString.
909 * @param str the DBusString
910 * @param buffer the nul-terminated characters to append
911 * @returns #FALSE if not enough memory.
914 _dbus_string_append (DBusString *str,
917 unsigned long buffer_len;
919 DBUS_STRING_PREAMBLE (str);
920 _dbus_assert (buffer != NULL);
922 buffer_len = strlen (buffer);
923 if (buffer_len > (unsigned long) real->max_length)
926 return append (real, buffer, buffer_len);
930 * Appends 4 bytes aligned on a 4 byte boundary
931 * with any alignment padding initialized to 0.
933 * @param str the DBusString
934 * @param octets 4 bytes to append
935 * @returns #FALSE if not enough memory.
938 _dbus_string_append_4_aligned (DBusString *str,
939 const unsigned char octets[4])
942 DBUS_STRING_PREAMBLE (str);
944 if (!align_length_then_lengthen (str, 4, 4))
947 p = (dbus_uint32_t*) (real->str + (real->len - 4));
948 *p = *((dbus_uint32_t*)octets);
954 * Appends 8 bytes aligned on an 8 byte boundary
955 * with any alignment padding initialized to 0.
957 * @param str the DBusString
958 * @param octets 4 bytes to append
959 * @returns #FALSE if not enough memory.
962 _dbus_string_append_8_aligned (DBusString *str,
963 const unsigned char octets[8])
965 #ifdef DBUS_HAVE_INT64
967 DBUS_STRING_PREAMBLE (str);
969 if (!align_length_then_lengthen (str, 8, 8))
972 p = (dbus_uint64_t*) (real->str + (real->len - 8));
973 *p = *((dbus_uint64_t*)octets);
976 DBUS_STRING_PREAMBLE (str);
978 if (!align_length_then_lengthen (str, 8, 8))
981 p = real->str + (real->len - 8);
991 _dbus_assert (p == (real->str + real->len));
998 * Appends a printf-style formatted string
999 * to the #DBusString.
1001 * @param str the string
1002 * @param format printf format
1003 * @param args variable argument list
1004 * @returns #FALSE if no memory
1007 _dbus_string_append_printf_valist (DBusString *str,
1013 DBUS_STRING_PREAMBLE (str);
1015 /* Measure the message length without terminating nul */
1016 len = vsnprintf (&c, 1, format, args);
1018 if (!_dbus_string_lengthen (str, len))
1021 vsprintf (real->str + (real->len - len),
1028 * Appends a printf-style formatted string
1029 * to the #DBusString.
1031 * @param str the string
1032 * @param format printf format
1033 * @returns #FALSE if no memory
1036 _dbus_string_append_printf (DBusString *str,
1043 va_start (args, format);
1044 retval = _dbus_string_append_printf_valist (str, format, args);
1051 * Appends block of bytes with the given length to a DBusString.
1053 * @param str the DBusString
1054 * @param buffer the bytes to append
1055 * @param len the number of bytes to append
1056 * @returns #FALSE if not enough memory.
1059 _dbus_string_append_len (DBusString *str,
1063 DBUS_STRING_PREAMBLE (str);
1064 _dbus_assert (buffer != NULL);
1065 _dbus_assert (len >= 0);
1067 return append (real, buffer, len);
1071 * Appends a single byte to the string, returning #FALSE
1072 * if not enough memory.
1074 * @param str the string
1075 * @param byte the byte to append
1076 * @returns #TRUE on success
1079 _dbus_string_append_byte (DBusString *str,
1082 DBUS_STRING_PREAMBLE (str);
1084 if (!set_length (real, real->len + 1))
1087 real->str[real->len-1] = byte;
1093 * Appends a single Unicode character, encoding the character
1096 * @param str the string
1097 * @param ch the Unicode character
1100 _dbus_string_append_unichar (DBusString *str,
1108 DBUS_STRING_PREAMBLE (str);
1110 /* this code is from GLib but is pretty standard I think */
1119 else if (ch < 0x800)
1124 else if (ch < 0x10000)
1129 else if (ch < 0x200000)
1134 else if (ch < 0x4000000)
1145 if (len > (real->max_length - real->len))
1146 return FALSE; /* real->len + len would overflow */
1148 if (!set_length (real, real->len + len))
1151 out = real->str + (real->len - len);
1153 for (i = len - 1; i > 0; --i)
1155 out[i] = (ch & 0x3f) | 0x80;
1158 out[0] = ch | first;
1164 delete (DBusRealString *real,
1171 memmove (real->str + start, real->str + start + len, real->len - (start + len));
1173 real->str[real->len] = '\0';
1177 * Deletes a segment of a DBusString with length len starting at
1178 * start. (Hint: to clear an entire string, setting length to 0
1179 * with _dbus_string_set_length() is easier.)
1181 * @param str the DBusString
1182 * @param start where to start deleting
1183 * @param len the number of bytes to delete
1186 _dbus_string_delete (DBusString *str,
1190 DBUS_STRING_PREAMBLE (str);
1191 _dbus_assert (start >= 0);
1192 _dbus_assert (len >= 0);
1193 _dbus_assert (start <= real->len);
1194 _dbus_assert (len <= real->len - start);
1196 delete (real, start, len);
1200 copy (DBusRealString *source,
1203 DBusRealString *dest,
1209 if (!open_gap (len, dest, insert_at))
1212 memcpy (dest->str + insert_at,
1213 source->str + start,
1220 * Checks assertions for two strings we're copying a segment between,
1221 * and declares real_source/real_dest variables.
1223 * @param source the source string
1224 * @param start the starting offset
1225 * @param dest the dest string
1226 * @param insert_at where the copied segment is inserted
1228 #define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at) \
1229 DBusRealString *real_source = (DBusRealString*) source; \
1230 DBusRealString *real_dest = (DBusRealString*) dest; \
1231 _dbus_assert ((source) != (dest)); \
1232 DBUS_GENERIC_STRING_PREAMBLE (real_source); \
1233 DBUS_GENERIC_STRING_PREAMBLE (real_dest); \
1234 _dbus_assert (!real_dest->constant); \
1235 _dbus_assert (!real_dest->locked); \
1236 _dbus_assert ((start) >= 0); \
1237 _dbus_assert ((start) <= real_source->len); \
1238 _dbus_assert ((insert_at) >= 0); \
1239 _dbus_assert ((insert_at) <= real_dest->len)
1242 * Moves the end of one string into another string. Both strings
1243 * must be initialized, valid strings.
1245 * @param source the source string
1246 * @param start where to chop off the source string
1247 * @param dest the destination string
1248 * @param insert_at where to move the chopped-off part of source string
1249 * @returns #FALSE if not enough memory
1252 _dbus_string_move (DBusString *source,
1257 DBusRealString *real_source = (DBusRealString*) source;
1258 _dbus_assert (start <= real_source->len);
1260 return _dbus_string_move_len (source, start,
1261 real_source->len - start,
1266 * Like _dbus_string_move(), but does not delete the section
1267 * of the source string that's copied to the dest string.
1269 * @param source the source string
1270 * @param start where to start copying the source string
1271 * @param dest the destination string
1272 * @param insert_at where to place the copied part of source string
1273 * @returns #FALSE if not enough memory
1276 _dbus_string_copy (const DBusString *source,
1281 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1283 return copy (real_source, start,
1284 real_source->len - start,
1290 * Like _dbus_string_move(), but can move a segment from
1291 * the middle of the source string.
1293 * @todo this doesn't do anything with max_length field.
1294 * we should probably just kill the max_length field though.
1296 * @param source the source string
1297 * @param start first byte of source string to move
1298 * @param len length of segment to move
1299 * @param dest the destination string
1300 * @param insert_at where to move the bytes from the source string
1301 * @returns #FALSE if not enough memory
1304 _dbus_string_move_len (DBusString *source,
1311 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1312 _dbus_assert (len >= 0);
1313 _dbus_assert ((start + len) <= real_source->len);
1320 else if (start == 0 &&
1321 len == real_source->len &&
1322 real_dest->len == 0)
1324 /* Short-circuit moving an entire existing string to an empty string
1325 * by just swapping the buffers.
1327 /* we assume ->constant doesn't matter as you can't have
1328 * a constant string involved in a move.
1330 #define ASSIGN_DATA(a, b) do { \
1331 (a)->str = (b)->str; \
1332 (a)->len = (b)->len; \
1333 (a)->allocated = (b)->allocated; \
1334 (a)->align_offset = (b)->align_offset; \
1339 ASSIGN_DATA (&tmp, real_source);
1340 ASSIGN_DATA (real_source, real_dest);
1341 ASSIGN_DATA (real_dest, &tmp);
1347 if (!copy (real_source, start, len,
1352 delete (real_source, start,
1360 * Like _dbus_string_copy(), but can copy a segment from the middle of
1361 * the source string.
1363 * @param source the source string
1364 * @param start where to start copying the source string
1365 * @param len length of segment to copy
1366 * @param dest the destination string
1367 * @param insert_at where to place the copied segment of source string
1368 * @returns #FALSE if not enough memory
1371 _dbus_string_copy_len (const DBusString *source,
1377 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
1378 _dbus_assert (len >= 0);
1379 _dbus_assert (start <= real_source->len);
1380 _dbus_assert (len <= real_source->len - start);
1382 return copy (real_source, start, len,
1388 * Replaces a segment of dest string with a segment of source string.
1390 * @todo optimize the case where the two lengths are the same, and
1391 * avoid memmoving the data in the trailing part of the string twice.
1393 * @todo avoid inserting the source into dest, then deleting
1394 * the replaced chunk of dest (which creates a potentially large
1395 * intermediate string). Instead, extend the replaced chunk
1396 * of dest with padding to the same size as the source chunk,
1397 * then copy in the source bytes.
1399 * @param source the source string
1400 * @param start where to start copying the source string
1401 * @param len length of segment to copy
1402 * @param dest the destination string
1403 * @param replace_at start of segment of dest string to replace
1404 * @param replace_len length of segment of dest string to replace
1405 * @returns #FALSE if not enough memory
1409 _dbus_string_replace_len (const DBusString *source,
1416 DBUS_STRING_COPY_PREAMBLE (source, start, dest, replace_at);
1417 _dbus_assert (len >= 0);
1418 _dbus_assert (start <= real_source->len);
1419 _dbus_assert (len <= real_source->len - start);
1420 _dbus_assert (replace_at >= 0);
1421 _dbus_assert (replace_at <= real_dest->len);
1422 _dbus_assert (replace_len <= real_dest->len - replace_at);
1424 if (!copy (real_source, start, len,
1425 real_dest, replace_at))
1428 delete (real_dest, replace_at + len, replace_len);
1433 /* Unicode macros and utf8_validate() from GLib Owen Taylor, Havoc
1434 * Pennington, and Tom Tromey are the authors and authorized relicense.
1437 /** computes length and mask of a unicode character
1438 * @param Char the char
1439 * @param Mask the mask variable to assign to
1440 * @param Len the length variable to assign to
1442 #define UTF8_COMPUTE(Char, Mask, Len) \
1448 else if ((Char & 0xe0) == 0xc0) \
1453 else if ((Char & 0xf0) == 0xe0) \
1458 else if ((Char & 0xf8) == 0xf0) \
1463 else if ((Char & 0xfc) == 0xf8) \
1468 else if ((Char & 0xfe) == 0xfc) \
1477 * computes length of a unicode character in UTF-8
1478 * @param Char the char
1480 #define UTF8_LENGTH(Char) \
1481 ((Char) < 0x80 ? 1 : \
1482 ((Char) < 0x800 ? 2 : \
1483 ((Char) < 0x10000 ? 3 : \
1484 ((Char) < 0x200000 ? 4 : \
1485 ((Char) < 0x4000000 ? 5 : 6)))))
1488 * Gets a UTF-8 value.
1490 * @param Result variable for extracted unicode char.
1491 * @param Chars the bytes to decode
1492 * @param Count counter variable
1493 * @param Mask mask for this char
1494 * @param Len length for this char in bytes
1496 #define UTF8_GET(Result, Chars, Count, Mask, Len) \
1497 (Result) = (Chars)[0] & (Mask); \
1498 for ((Count) = 1; (Count) < (Len); ++(Count)) \
1500 if (((Chars)[(Count)] & 0xc0) != 0x80) \
1506 (Result) |= ((Chars)[(Count)] & 0x3f); \
1510 * Check whether a unicode char is in a valid range.
1512 * @param Char the character
1514 #define UNICODE_VALID(Char) \
1515 ((Char) < 0x110000 && \
1516 (((Char) & 0xFFFFF800) != 0xD800) && \
1517 ((Char) < 0xFDD0 || (Char) > 0xFDEF) && \
1518 ((Char) & 0xFFFF) != 0xFFFF)
1521 * Gets a unicode character from a UTF-8 string. Does no validation;
1522 * you must verify that the string is valid UTF-8 in advance and must
1523 * pass in the start of a character.
1525 * @param str the string
1526 * @param start the start of the UTF-8 character.
1527 * @param ch_return location to return the character
1528 * @param end_return location to return the byte index of next character
1531 _dbus_string_get_unichar (const DBusString *str,
1533 dbus_unichar_t *ch_return,
1537 dbus_unichar_t result;
1540 DBUS_CONST_STRING_PREAMBLE (str);
1541 _dbus_assert (start >= 0);
1542 _dbus_assert (start <= real->len);
1547 *end_return = real->len;
1550 p = real->str + start;
1553 UTF8_COMPUTE (c, mask, len);
1556 UTF8_GET (result, p, i, mask, len);
1558 if (result == (dbus_unichar_t)-1)
1562 *ch_return = result;
1564 *end_return = start + len;
1568 * Finds the given substring in the string,
1569 * returning #TRUE and filling in the byte index
1570 * where the substring was found, if it was found.
1571 * Returns #FALSE if the substring wasn't found.
1572 * Sets *start to the length of the string if the substring
1575 * @param str the string
1576 * @param start where to start looking
1577 * @param substr the substring
1578 * @param found return location for where it was found, or #NULL
1579 * @returns #TRUE if found
1582 _dbus_string_find (const DBusString *str,
1587 return _dbus_string_find_to (str, start,
1588 ((const DBusRealString*)str)->len,
1593 * Finds the given substring in the string,
1594 * up to a certain position,
1595 * returning #TRUE and filling in the byte index
1596 * where the substring was found, if it was found.
1597 * Returns #FALSE if the substring wasn't found.
1598 * Sets *start to the length of the string if the substring
1601 * @param str the string
1602 * @param start where to start looking
1603 * @param end where to stop looking
1604 * @param substr the substring
1605 * @param found return location for where it was found, or #NULL
1606 * @returns #TRUE if found
1609 _dbus_string_find_to (const DBusString *str,
1616 DBUS_CONST_STRING_PREAMBLE (str);
1617 _dbus_assert (substr != NULL);
1618 _dbus_assert (start <= real->len);
1619 _dbus_assert (start >= 0);
1620 _dbus_assert (substr != NULL);
1621 _dbus_assert (end <= real->len);
1622 _dbus_assert (start <= end);
1624 /* we always "find" an empty string */
1625 if (*substr == '\0')
1635 if (real->str[i] == substr[0])
1641 if (substr[j - i] == '\0')
1643 else if (real->str[j] != substr[j - i])
1649 if (substr[j - i] == '\0')
1667 * Find the given byte scanning backward from the given start.
1668 * Sets *found to -1 if the byte is not found.
1670 * @param str the string
1671 * @param start the place to start scanning (will not find the byte at this point)
1672 * @param byte the byte to find
1673 * @param found return location for where it was found
1674 * @returns #TRUE if found
1677 _dbus_string_find_byte_backward (const DBusString *str,
1683 DBUS_CONST_STRING_PREAMBLE (str);
1684 _dbus_assert (start <= real->len);
1685 _dbus_assert (start >= 0);
1686 _dbus_assert (found != NULL);
1691 if (real->str[i] == byte)
1704 * Finds a blank (space or tab) in the string. Returns #TRUE
1705 * if found, #FALSE otherwise. If a blank is not found sets
1706 * *found to the length of the string.
1708 * @param str the string
1709 * @param start byte index to start looking
1710 * @param found place to store the location of the first blank
1711 * @returns #TRUE if a blank was found
1714 _dbus_string_find_blank (const DBusString *str,
1719 DBUS_CONST_STRING_PREAMBLE (str);
1720 _dbus_assert (start <= real->len);
1721 _dbus_assert (start >= 0);
1724 while (i < real->len)
1726 if (real->str[i] == ' ' ||
1727 real->str[i] == '\t')
1744 * Skips blanks from start, storing the first non-blank in *end
1745 * (blank is space or tab).
1747 * @param str the string
1748 * @param start where to start
1749 * @param end where to store the first non-blank byte index
1752 _dbus_string_skip_blank (const DBusString *str,
1757 DBUS_CONST_STRING_PREAMBLE (str);
1758 _dbus_assert (start <= real->len);
1759 _dbus_assert (start >= 0);
1762 while (i < real->len)
1764 if (!(real->str[i] == ' ' ||
1765 real->str[i] == '\t'))
1771 _dbus_assert (i == real->len || !(real->str[i] == ' ' ||
1772 real->str[i] == '\t'));
1779 * Skips whitespace from start, storing the first non-whitespace in *end.
1780 * (whitespace is space, tab, newline, CR).
1782 * @param str the string
1783 * @param start where to start
1784 * @param end where to store the first non-whitespace byte index
1787 _dbus_string_skip_white (const DBusString *str,
1792 DBUS_CONST_STRING_PREAMBLE (str);
1793 _dbus_assert (start <= real->len);
1794 _dbus_assert (start >= 0);
1797 while (i < real->len)
1799 if (!(real->str[i] == ' ' ||
1800 real->str[i] == '\n' ||
1801 real->str[i] == '\r' ||
1802 real->str[i] == '\t'))
1808 _dbus_assert (i == real->len || !(real->str[i] == ' ' ||
1809 real->str[i] == '\t'));
1816 * Assigns a newline-terminated or \\r\\n-terminated line from the front
1817 * of the string to the given dest string. The dest string's previous
1818 * contents are deleted. If the source string contains no newline,
1819 * moves the entire source string to the dest string.
1821 * @todo owen correctly notes that this is a stupid function (it was
1822 * written purely for test code,
1823 * e.g. dbus-message-builder.c). Probably should be enforced as test
1824 * code only with #ifdef DBUS_BUILD_TESTS
1826 * @param source the source string
1827 * @param dest the destination string (contents are replaced)
1828 * @returns #FALSE if no memory, or source has length 0
1831 _dbus_string_pop_line (DBusString *source,
1835 dbus_bool_t have_newline;
1837 _dbus_string_set_length (dest, 0);
1840 if (_dbus_string_find (source, 0, "\n", &eol))
1842 have_newline = TRUE;
1843 eol += 1; /* include newline */
1847 eol = _dbus_string_get_length (source);
1848 have_newline = FALSE;
1852 return FALSE; /* eof */
1854 if (!_dbus_string_move_len (source, 0, eol,
1860 /* dump the newline and the \r if we have one */
1863 dbus_bool_t have_cr;
1865 _dbus_assert (_dbus_string_get_length (dest) > 0);
1867 if (_dbus_string_get_length (dest) > 1 &&
1868 _dbus_string_get_byte (dest,
1869 _dbus_string_get_length (dest) - 2) == '\r')
1874 _dbus_string_set_length (dest,
1875 _dbus_string_get_length (dest) -
1883 * Deletes up to and including the first blank space
1886 * @param str the string
1889 _dbus_string_delete_first_word (DBusString *str)
1893 if (_dbus_string_find_blank (str, 0, &i))
1894 _dbus_string_skip_blank (str, i, &i);
1896 _dbus_string_delete (str, 0, i);
1900 * Deletes any leading blanks in the string
1902 * @param str the string
1905 _dbus_string_delete_leading_blanks (DBusString *str)
1909 _dbus_string_skip_blank (str, 0, &i);
1912 _dbus_string_delete (str, 0, i);
1916 * Tests two DBusString for equality.
1918 * @todo memcmp is probably faster
1920 * @param a first string
1921 * @param b second string
1922 * @returns #TRUE if equal
1925 _dbus_string_equal (const DBusString *a,
1926 const DBusString *b)
1928 const unsigned char *ap;
1929 const unsigned char *bp;
1930 const unsigned char *a_end;
1931 const DBusRealString *real_a = (const DBusRealString*) a;
1932 const DBusRealString *real_b = (const DBusRealString*) b;
1933 DBUS_GENERIC_STRING_PREAMBLE (real_a);
1934 DBUS_GENERIC_STRING_PREAMBLE (real_b);
1936 if (real_a->len != real_b->len)
1941 a_end = real_a->str + real_a->len;
1955 * Tests two DBusString for equality up to the given length.
1957 * @todo write a unit test
1959 * @todo memcmp is probably faster
1961 * @param a first string
1962 * @param b second string
1963 * @param len the lengh
1964 * @returns #TRUE if equal for the given number of bytes
1967 _dbus_string_equal_len (const DBusString *a,
1968 const DBusString *b,
1971 const unsigned char *ap;
1972 const unsigned char *bp;
1973 const unsigned char *a_end;
1974 const DBusRealString *real_a = (const DBusRealString*) a;
1975 const DBusRealString *real_b = (const DBusRealString*) b;
1976 DBUS_GENERIC_STRING_PREAMBLE (real_a);
1977 DBUS_GENERIC_STRING_PREAMBLE (real_b);
1979 if (real_a->len != real_b->len &&
1980 (real_a->len < len || real_b->len < len))
1985 a_end = real_a->str + MIN (real_a->len, len);
1999 * Checks whether a string is equal to a C string.
2001 * @param a the string
2002 * @param c_str the C string
2003 * @returns #TRUE if equal
2006 _dbus_string_equal_c_str (const DBusString *a,
2009 const unsigned char *ap;
2010 const unsigned char *bp;
2011 const unsigned char *a_end;
2012 const DBusRealString *real_a = (const DBusRealString*) a;
2013 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2014 _dbus_assert (c_str != NULL);
2017 bp = (const unsigned char*) c_str;
2018 a_end = real_a->str + real_a->len;
2019 while (ap != a_end && *bp)
2028 if (ap != a_end || *bp)
2035 * Checks whether a string starts with the given C string.
2037 * @param a the string
2038 * @param c_str the C string
2039 * @returns #TRUE if string starts with it
2042 _dbus_string_starts_with_c_str (const DBusString *a,
2045 const unsigned char *ap;
2046 const unsigned char *bp;
2047 const unsigned char *a_end;
2048 const DBusRealString *real_a = (const DBusRealString*) a;
2049 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2050 _dbus_assert (c_str != NULL);
2053 bp = (const unsigned char*) c_str;
2054 a_end = real_a->str + real_a->len;
2055 while (ap != a_end && *bp)
2071 * Returns whether a string ends with the given suffix
2073 * @todo memcmp might make this faster.
2075 * @param a the string
2076 * @param c_str the C-style string
2077 * @returns #TRUE if the string ends with the suffix
2080 _dbus_string_ends_with_c_str (const DBusString *a,
2083 const unsigned char *ap;
2084 const unsigned char *bp;
2085 const unsigned char *a_end;
2086 unsigned long c_str_len;
2087 const DBusRealString *real_a = (const DBusRealString*) a;
2088 DBUS_GENERIC_STRING_PREAMBLE (real_a);
2089 _dbus_assert (c_str != NULL);
2091 c_str_len = strlen (c_str);
2092 if (((unsigned long)real_a->len) < c_str_len)
2095 ap = real_a->str + (real_a->len - c_str_len);
2096 bp = (const unsigned char*) c_str;
2097 a_end = real_a->str + real_a->len;
2107 _dbus_assert (*ap == '\0');
2108 _dbus_assert (*bp == '\0');
2113 static const signed char base64_table[] = {
2180 /** The minimum char that's a valid char in Base64-encoded text */
2181 #define UNBASE64_MIN_CHAR (43)
2182 /** The maximum char that's a valid char in Base64-encoded text */
2183 #define UNBASE64_MAX_CHAR (122)
2184 /** Must subtract this from a char's integer value before offsetting
2185 * into unbase64_table
2187 #define UNBASE64_TABLE_OFFSET UNBASE64_MIN_CHAR
2188 static const signed char unbase64_table[] = {
2272 * Encodes a string using Base64, as documented in RFC 2045.
2274 * @param source the string to encode
2275 * @param start byte index to start encoding
2276 * @param dest string where encoded data should be placed
2277 * @param insert_at where to place encoded data
2278 * @returns #TRUE if encoding was successful, #FALSE if no memory etc.
2281 _dbus_string_base64_encode (const DBusString *source,
2287 unsigned int dest_len; /* unsigned for overflow checks below */
2288 const unsigned char *s;
2290 const unsigned char *triplet_end;
2291 const unsigned char *final_end;
2292 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
2293 _dbus_assert (source != dest);
2295 /* For each 24 bits (3 bytes) of input, we have 4 bytes of
2298 source_len = real_source->len - start;
2299 dest_len = (source_len / 3) * 4;
2300 if (source_len % 3 != 0)
2303 if (dest_len > (unsigned int) real_dest->max_length)
2306 if (source_len == 0)
2309 if (!open_gap (dest_len, real_dest, insert_at))
2312 d = real_dest->str + insert_at;
2313 s = real_source->str + start;
2314 final_end = real_source->str + (start + source_len);
2315 triplet_end = final_end - (source_len % 3);
2316 _dbus_assert (triplet_end <= final_end);
2317 _dbus_assert ((final_end - triplet_end) < 3);
2319 #define ENCODE_64(v) (base64_table[ (unsigned char) (v) ])
2320 #define SIX_BITS_MASK (0x3f)
2321 _dbus_assert (SIX_BITS_MASK < _DBUS_N_ELEMENTS (base64_table));
2323 while (s != triplet_end)
2325 unsigned int triplet;
2327 triplet = s[2] | (s[1] << 8) | (s[0] << 16);
2329 /* Encode each 6 bits. */
2331 *d++ = ENCODE_64 (triplet >> 18);
2332 *d++ = ENCODE_64 ((triplet >> 12) & SIX_BITS_MASK);
2333 *d++ = ENCODE_64 ((triplet >> 6) & SIX_BITS_MASK);
2334 *d++ = ENCODE_64 (triplet & SIX_BITS_MASK);
2339 switch (final_end - triplet_end)
2343 unsigned int doublet;
2345 doublet = s[1] | (s[0] << 8);
2347 *d++ = ENCODE_64 (doublet >> 12);
2348 *d++ = ENCODE_64 ((doublet >> 6) & SIX_BITS_MASK);
2349 *d++ = ENCODE_64 (doublet & SIX_BITS_MASK);
2355 unsigned int singlet;
2359 *d++ = ENCODE_64 ((singlet >> 6) & SIX_BITS_MASK);
2360 *d++ = ENCODE_64 (singlet & SIX_BITS_MASK);
2369 _dbus_assert (d == (real_dest->str + (insert_at + dest_len)));
2375 * Decodes a string from Base64, as documented in RFC 2045.
2377 * @todo sort out the AUDIT comment in here. The case it mentions
2378 * ("====" or "x===") is not allowed in correct base64, so need to
2379 * decide what to do with that kind of input. Probably ignore it
2380 * since we ignore any other junk seen.
2382 * @param source the string to decode
2383 * @param start byte index to start decode
2384 * @param dest string where decoded data should be placed
2385 * @param insert_at where to place decoded data
2386 * @returns #TRUE if decoding was successful, #FALSE if no memory etc.
2389 _dbus_string_base64_decode (const DBusString *source,
2398 unsigned int triplet = 0;
2401 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
2402 _dbus_assert (source != dest);
2404 source_len = real_source->len - start;
2405 s = real_source->str + start;
2406 end = real_source->str + source_len;
2408 if (source_len == 0)
2411 if (!_dbus_string_init (&result))
2418 /* The idea is to just skip anything that isn't
2419 * a base64 char - it's allowed to have whitespace,
2420 * newlines, etc. in here. We also ignore trailing
2421 * base64 chars, though that's suspicious.
2424 if (*s >= UNBASE64_MIN_CHAR &&
2425 *s <= UNBASE64_MAX_CHAR)
2429 /* '=' is padding, doesn't represent additional data
2430 * but does increment our count.
2439 val = unbase64_table[(*s) - UNBASE64_TABLE_OFFSET];
2444 triplet |= (unsigned int) val;
2449 if (sextet_count == 4)
2451 /* no pad = 3 bytes, 1 pad = 2 bytes, 2 pad = 1 byte */
2454 /* AUDIT: Comment doesn't mention 4 pad => 0,
2455 * 3 pad => 1 byte, though the code should
2456 * work fine if those are the required outputs.
2458 * I assume that the spec requires dropping
2459 * the top two bits of, say, ///= which is > 2
2460 * bytes worth of bits. (Or otherwise, you couldn't
2461 * actually represent 2 byte sequences.
2466 if (!_dbus_string_append_byte (&result,
2473 if (!_dbus_string_append_byte (&result,
2474 (triplet >> 8) & 0xff))
2478 if (!_dbus_string_append_byte (&result,
2491 if (!_dbus_string_move (&result, 0, dest, insert_at))
2493 _dbus_string_free (&result);
2497 _dbus_string_free (&result);
2502 _dbus_string_free (&result);
2508 * Encodes a string in hex, the way MD5 and SHA-1 are usually
2509 * encoded. (Each byte is two hex digits.)
2511 * @param source the string to encode
2512 * @param start byte index to start encoding
2513 * @param dest string where encoded data should be placed
2514 * @param insert_at where to place encoded data
2515 * @returns #TRUE if encoding was successful, #FALSE if no memory etc.
2518 _dbus_string_hex_encode (const DBusString *source,
2524 const char hexdigits[16] = {
2525 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
2526 'a', 'b', 'c', 'd', 'e', 'f'
2528 const unsigned char *p;
2529 const unsigned char *end;
2532 _dbus_assert (start <= _dbus_string_get_length (source));
2534 if (!_dbus_string_init (&result))
2539 p = (const unsigned char*) _dbus_string_get_const_data (source);
2540 end = p + _dbus_string_get_length (source);
2545 if (!_dbus_string_append_byte (&result,
2546 hexdigits[(*p >> 4)]))
2549 if (!_dbus_string_append_byte (&result,
2550 hexdigits[(*p & 0x0f)]))
2556 if (!_dbus_string_move (&result, 0, dest, insert_at))
2562 _dbus_string_free (&result);
2567 * Decodes a string from hex encoding.
2569 * @param source the string to decode
2570 * @param start byte index to start decode
2571 * @param dest string where decoded data should be placed
2572 * @param insert_at where to place decoded data
2573 * @returns #TRUE if decoding was successful, #FALSE if no memory etc.
2576 _dbus_string_hex_decode (const DBusString *source,
2582 const unsigned char *p;
2583 const unsigned char *end;
2585 dbus_bool_t high_bits;
2587 _dbus_assert (start <= _dbus_string_get_length (source));
2589 if (!_dbus_string_init (&result))
2595 p = (const unsigned char*) _dbus_string_get_const_data (source);
2596 end = p + _dbus_string_get_length (source);
2661 _dbus_verbose ("invalid character '%c' in hex encoded text\n",
2668 if (!_dbus_string_append_byte (&result,
2677 len = _dbus_string_get_length (&result);
2679 b = _dbus_string_get_byte (&result, len - 1);
2683 _dbus_string_set_byte (&result, len - 1, b);
2686 high_bits = !high_bits;
2691 if (!_dbus_string_move (&result, 0, dest, insert_at))
2697 _dbus_string_free (&result);
2702 * Checks that the given range of the string is valid ASCII with no
2703 * nul bytes. If the given range is not entirely contained in the
2704 * string, returns #FALSE.
2706 * @todo this is inconsistent with most of DBusString in that
2707 * it allows a start,len range that isn't in the string.
2709 * @param str the string
2710 * @param start first byte index to check
2711 * @param len number of bytes to check
2712 * @returns #TRUE if the byte range exists and is all valid ASCII
2715 _dbus_string_validate_ascii (const DBusString *str,
2719 const unsigned char *s;
2720 const unsigned char *end;
2721 DBUS_CONST_STRING_PREAMBLE (str);
2722 _dbus_assert (start >= 0);
2723 _dbus_assert (start <= real->len);
2724 _dbus_assert (len >= 0);
2726 if (len > real->len - start)
2729 s = real->str + start;
2733 if (_DBUS_UNLIKELY (*s == '\0' ||
2734 ((*s & ~0x7f) != 0)))
2744 * Checks that the given range of the string is valid UTF-8. If the
2745 * given range is not entirely contained in the string, returns
2746 * #FALSE. If the string contains any nul bytes in the given range,
2747 * returns #FALSE. If the start and start+len are not on character
2748 * boundaries, returns #FALSE.
2750 * @todo this is inconsistent with most of DBusString in that
2751 * it allows a start,len range that isn't in the string.
2753 * @param str the string
2754 * @param start first byte index to check
2755 * @param len number of bytes to check
2756 * @returns #TRUE if the byte range exists and is all valid UTF-8
2759 _dbus_string_validate_utf8 (const DBusString *str,
2763 const unsigned char *p;
2764 const unsigned char *end;
2765 DBUS_CONST_STRING_PREAMBLE (str);
2766 _dbus_assert (start >= 0);
2767 _dbus_assert (start <= real->len);
2768 _dbus_assert (len >= 0);
2770 /* we are doing _DBUS_UNLIKELY() here which might be
2771 * dubious in a generic library like GLib, but in D-BUS
2772 * we know we're validating messages and that it would
2773 * only be evil/broken apps that would have invalid
2774 * UTF-8. Also, this function seems to be a performance
2775 * bottleneck in profiles.
2778 if (_DBUS_UNLIKELY (len > real->len - start))
2781 p = real->str + start;
2786 int i, mask = 0, char_len;
2787 dbus_unichar_t result;
2788 unsigned char c = (unsigned char) *p;
2790 UTF8_COMPUTE (c, mask, char_len);
2792 if (_DBUS_UNLIKELY (char_len == -1))
2795 /* check that the expected number of bytes exists in the remaining length */
2796 if (_DBUS_UNLIKELY ((end - p) < char_len))
2799 UTF8_GET (result, p, i, mask, char_len);
2801 if (_DBUS_UNLIKELY (UTF8_LENGTH (result) != char_len)) /* Check for overlong UTF-8 */
2804 if (_DBUS_UNLIKELY (result == (dbus_unichar_t)-1))
2807 if (_DBUS_UNLIKELY (!UNICODE_VALID (result)))
2813 /* See that we covered the entire length if a length was
2816 if (_DBUS_UNLIKELY (p != end))
2823 * Checks that the given range of the string is all nul bytes. If the
2824 * given range is not entirely contained in the string, returns
2827 * @todo this is inconsistent with most of DBusString in that
2828 * it allows a start,len range that isn't in the string.
2830 * @param str the string
2831 * @param start first byte index to check
2832 * @param len number of bytes to check
2833 * @returns #TRUE if the byte range exists and is all nul bytes
2836 _dbus_string_validate_nul (const DBusString *str,
2840 const unsigned char *s;
2841 const unsigned char *end;
2842 DBUS_CONST_STRING_PREAMBLE (str);
2843 _dbus_assert (start >= 0);
2844 _dbus_assert (len >= 0);
2845 _dbus_assert (start <= real->len);
2847 if (len > real->len - start)
2850 s = real->str + start;
2854 if (_DBUS_UNLIKELY (*s != '\0'))
2863 * Checks that the given range of the string is a valid object path
2864 * name in the D-BUS protocol. This includes a length restriction,
2865 * etc., see the specification. It does not validate UTF-8, that has
2866 * to be done separately for now.
2868 * @todo this is inconsistent with most of DBusString in that
2869 * it allows a start,len range that isn't in the string.
2871 * @todo change spec to disallow more things, such as spaces in the
2874 * @param str the string
2875 * @param start first byte index to check
2876 * @param len number of bytes to check
2877 * @returns #TRUE if the byte range exists and is a valid name
2880 _dbus_string_validate_path (const DBusString *str,
2884 const unsigned char *s;
2885 const unsigned char *end;
2886 const unsigned char *last_slash;
2888 DBUS_CONST_STRING_PREAMBLE (str);
2889 _dbus_assert (start >= 0);
2890 _dbus_assert (len >= 0);
2891 _dbus_assert (start <= real->len);
2893 if (len > real->len - start)
2896 if (len > DBUS_MAXIMUM_NAME_LENGTH)
2902 s = real->str + start;
2914 if ((s - last_slash) < 2)
2915 return FALSE; /* no empty path components allowed */
2923 if ((end - last_slash) < 2 &&
2925 return FALSE; /* trailing slash not allowed unless the string is "/" */
2930 #define VALID_INITIAL_NAME_CHARACTER(c) \
2931 ( ((c) >= 'A' && (c) <= 'Z') || \
2932 ((c) >= 'a' && (c) <= 'z') || \
2935 #define VALID_NAME_CHARACTER(c) \
2936 ( ((c) >= '0' && (c) <= '9') || \
2937 ((c) >= 'A' && (c) <= 'Z') || \
2938 ((c) >= 'a' && (c) <= 'z') || \
2942 * Checks that the given range of the string is a valid interface name
2943 * in the D-BUS protocol. This includes a length restriction and an
2944 * ASCII subset, see the specification.
2946 * @todo this is inconsistent with most of DBusString in that
2947 * it allows a start,len range that isn't in the string.
2949 * @param str the string
2950 * @param start first byte index to check
2951 * @param len number of bytes to check
2952 * @returns #TRUE if the byte range exists and is a valid name
2955 _dbus_string_validate_interface (const DBusString *str,
2959 const unsigned char *s;
2960 const unsigned char *end;
2961 const unsigned char *iface;
2962 const unsigned char *last_dot;
2964 DBUS_CONST_STRING_PREAMBLE (str);
2965 _dbus_assert (start >= 0);
2966 _dbus_assert (len >= 0);
2967 _dbus_assert (start <= real->len);
2969 if (len > real->len - start)
2972 if (len > DBUS_MAXIMUM_NAME_LENGTH)
2979 iface = real->str + start;
2983 /* check special cases of first char so it doesn't have to be done
2984 * in the loop. Note we know len > 0
2986 if (_DBUS_UNLIKELY (*s == '.')) /* disallow starting with a . */
2988 else if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*s)))
2997 if (_DBUS_UNLIKELY ((s + 1) == end))
2999 else if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*(s + 1))))
3002 ++s; /* we just validated the next char, so skip two */
3004 else if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
3012 if (_DBUS_UNLIKELY (last_dot == NULL))
3019 * Checks that the given range of the string is a valid member name
3020 * in the D-BUS protocol. This includes a length restriction, etc.,
3021 * see the specification.
3023 * @todo this is inconsistent with most of DBusString in that
3024 * it allows a start,len range that isn't in the string.
3026 * @param str the string
3027 * @param start first byte index to check
3028 * @param len number of bytes to check
3029 * @returns #TRUE if the byte range exists and is a valid name
3032 _dbus_string_validate_member (const DBusString *str,
3036 const unsigned char *s;
3037 const unsigned char *end;
3038 const unsigned char *member;
3040 DBUS_CONST_STRING_PREAMBLE (str);
3041 _dbus_assert (start >= 0);
3042 _dbus_assert (len >= 0);
3043 _dbus_assert (start <= real->len);
3045 if (len > real->len - start)
3048 if (len > DBUS_MAXIMUM_NAME_LENGTH)
3054 member = real->str + start;
3058 /* check special cases of first char so it doesn't have to be done
3059 * in the loop. Note we know len > 0
3062 if (_DBUS_UNLIKELY (!VALID_INITIAL_NAME_CHARACTER (*s)))
3069 if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
3081 * Checks that the given range of the string is a valid error name
3082 * in the D-BUS protocol. This includes a length restriction, etc.,
3083 * see the specification.
3085 * @todo this is inconsistent with most of DBusString in that
3086 * it allows a start,len range that isn't in the string.
3088 * @param str the string
3089 * @param start first byte index to check
3090 * @param len number of bytes to check
3091 * @returns #TRUE if the byte range exists and is a valid name
3094 _dbus_string_validate_error_name (const DBusString *str,
3098 /* Same restrictions as interface name at the moment */
3099 return _dbus_string_validate_interface (str, start, len);
3102 /* This assumes the first char exists and is ':' */
3104 _dbus_string_validate_base_service (const DBusString *str,
3108 const unsigned char *s;
3109 const unsigned char *end;
3110 const unsigned char *service;
3112 DBUS_CONST_STRING_PREAMBLE (str);
3113 _dbus_assert (start >= 0);
3114 _dbus_assert (len >= 0);
3115 _dbus_assert (start <= real->len);
3117 if (len > real->len - start)
3120 if (len > DBUS_MAXIMUM_NAME_LENGTH)
3123 _dbus_assert (len > 0);
3125 service = real->str + start;
3126 end = service + len;
3127 _dbus_assert (*service == ':');
3134 if (_DBUS_UNLIKELY ((s + 1) == end))
3136 if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*(s + 1))))
3138 ++s; /* we just validated the next char, so skip two */
3140 else if (_DBUS_UNLIKELY (!VALID_NAME_CHARACTER (*s)))
3152 * Checks that the given range of the string is a valid service name
3153 * in the D-BUS protocol. This includes a length restriction, etc.,
3154 * see the specification.
3156 * @todo this is inconsistent with most of DBusString in that
3157 * it allows a start,len range that isn't in the string.
3159 * @param str the string
3160 * @param start first byte index to check
3161 * @param len number of bytes to check
3162 * @returns #TRUE if the byte range exists and is a valid name
3165 _dbus_string_validate_service (const DBusString *str,
3169 if (_DBUS_UNLIKELY (len == 0))
3171 if (_dbus_string_get_byte (str, start) == ':')
3172 return _dbus_string_validate_base_service (str, start, len);
3174 return _dbus_string_validate_interface (str, start, len);
3178 * Clears all allocated bytes in the string to zero.
3180 * @param str the string
3183 _dbus_string_zero (DBusString *str)
3185 DBUS_STRING_PREAMBLE (str);
3187 memset (real->str - real->align_offset, '\0', real->allocated);
3191 #ifdef DBUS_BUILD_TESTS
3192 #include "dbus-test.h"
3196 test_max_len (DBusString *str,
3201 if (!_dbus_string_set_length (str, max_len - 1))
3202 _dbus_assert_not_reached ("setting len to one less than max should have worked");
3205 if (!_dbus_string_set_length (str, max_len))
3206 _dbus_assert_not_reached ("setting len to max len should have worked");
3208 if (_dbus_string_set_length (str, max_len + 1))
3209 _dbus_assert_not_reached ("setting len to one more than max len should not have worked");
3211 if (!_dbus_string_set_length (str, 0))
3212 _dbus_assert_not_reached ("setting len to zero should have worked");
3216 test_base64_roundtrip (const unsigned char *data,
3224 len = strlen (data);
3226 if (!_dbus_string_init (&orig))
3227 _dbus_assert_not_reached ("could not init string");
3229 if (!_dbus_string_init (&encoded))
3230 _dbus_assert_not_reached ("could not init string");
3232 if (!_dbus_string_init (&decoded))
3233 _dbus_assert_not_reached ("could not init string");
3235 if (!_dbus_string_append_len (&orig, data, len))
3236 _dbus_assert_not_reached ("couldn't append orig data");
3238 if (!_dbus_string_base64_encode (&orig, 0, &encoded, 0))
3239 _dbus_assert_not_reached ("could not encode");
3241 if (!_dbus_string_base64_decode (&encoded, 0, &decoded, 0))
3242 _dbus_assert_not_reached ("could not decode");
3244 if (!_dbus_string_equal (&orig, &decoded))
3248 printf ("Original string %d bytes encoded %d bytes decoded %d bytes\n",
3249 _dbus_string_get_length (&orig),
3250 _dbus_string_get_length (&encoded),
3251 _dbus_string_get_length (&decoded));
3252 printf ("Original: %s\n", data);
3253 s = _dbus_string_get_const_data (&decoded);
3254 printf ("Decoded: %s\n", s);
3255 _dbus_assert_not_reached ("original string not the same as string decoded from base64");
3258 _dbus_string_free (&orig);
3259 _dbus_string_free (&encoded);
3260 _dbus_string_free (&decoded);
3264 test_hex_roundtrip (const unsigned char *data,
3272 len = strlen (data);
3274 if (!_dbus_string_init (&orig))
3275 _dbus_assert_not_reached ("could not init string");
3277 if (!_dbus_string_init (&encoded))
3278 _dbus_assert_not_reached ("could not init string");
3280 if (!_dbus_string_init (&decoded))
3281 _dbus_assert_not_reached ("could not init string");
3283 if (!_dbus_string_append_len (&orig, data, len))
3284 _dbus_assert_not_reached ("couldn't append orig data");
3286 if (!_dbus_string_hex_encode (&orig, 0, &encoded, 0))
3287 _dbus_assert_not_reached ("could not encode");
3289 if (!_dbus_string_hex_decode (&encoded, 0, &decoded, 0))
3290 _dbus_assert_not_reached ("could not decode");
3292 if (!_dbus_string_equal (&orig, &decoded))
3296 printf ("Original string %d bytes encoded %d bytes decoded %d bytes\n",
3297 _dbus_string_get_length (&orig),
3298 _dbus_string_get_length (&encoded),
3299 _dbus_string_get_length (&decoded));
3300 printf ("Original: %s\n", data);
3301 s = _dbus_string_get_const_data (&decoded);
3302 printf ("Decoded: %s\n", s);
3303 _dbus_assert_not_reached ("original string not the same as string decoded from base64");
3306 _dbus_string_free (&orig);
3307 _dbus_string_free (&encoded);
3308 _dbus_string_free (&decoded);
3311 typedef void (* TestRoundtripFunc) (const unsigned char *data,
3314 test_roundtrips (TestRoundtripFunc func)
3316 (* func) ("Hello this is a string\n", -1);
3317 (* func) ("Hello this is a string\n1", -1);
3318 (* func) ("Hello this is a string\n12", -1);
3319 (* func) ("Hello this is a string\n123", -1);
3320 (* func) ("Hello this is a string\n1234", -1);
3321 (* func) ("Hello this is a string\n12345", -1);
3325 (* func) ("123", 3);
3326 (* func) ("1234", 4);
3327 (* func) ("12345", 5);
3331 (* func) ("123", 4);
3332 (* func) ("1234", 5);
3333 (* func) ("12345", 6);
3335 unsigned char buf[512];
3339 while (i < _DBUS_N_ELEMENTS (buf))
3345 while (i < _DBUS_N_ELEMENTS (buf))
3355 * @ingroup DBusStringInternals
3356 * Unit test for DBusString.
3358 * @todo Need to write tests for _dbus_string_copy() and
3359 * _dbus_string_move() moving to/from each of start/middle/end of a
3360 * string. Also need tests for _dbus_string_move_len ()
3362 * @returns #TRUE on success.
3365 _dbus_string_test (void)
3372 int lens[] = { 0, 1, 2, 3, 4, 5, 10, 16, 17, 18, 25, 31, 32, 33, 34, 35, 63, 64, 65, 66, 67, 68, 69, 70, 71, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136 };
3375 const char *valid_paths[] = {
3381 const char *invalid_paths[] = {
3397 const char *valid_interfaces[] = {
3398 "org.freedesktop.Foo",
3400 "Blah.Blah.Blah.Blah.Blah",
3403 "a0.b1.c2.d3.e4.f5.g6",
3406 const char *invalid_interfaces[] = {
3434 const char *valid_base_services[] = {
3443 ":abce.freedesktop.blah"
3445 const char *invalid_base_services[] = {
3459 const char *valid_members[] = {
3467 const char *invalid_members[] = {
3483 while (i < _DBUS_N_ELEMENTS (lens))
3485 if (!_dbus_string_init (&str))
3486 _dbus_assert_not_reached ("failed to init string");
3488 set_max_length (&str, lens[i]);
3490 test_max_len (&str, lens[i]);
3491 _dbus_string_free (&str);
3496 /* Test shortening and setting length */
3498 while (i < _DBUS_N_ELEMENTS (lens))
3502 if (!_dbus_string_init (&str))
3503 _dbus_assert_not_reached ("failed to init string");
3505 set_max_length (&str, lens[i]);
3507 if (!_dbus_string_set_length (&str, lens[i]))
3508 _dbus_assert_not_reached ("failed to set string length");
3513 _dbus_assert (_dbus_string_get_length (&str) == j);
3516 _dbus_string_shorten (&str, 1);
3517 _dbus_assert (_dbus_string_get_length (&str) == (j - 1));
3522 _dbus_string_free (&str);
3527 /* Test appending data */
3528 if (!_dbus_string_init (&str))
3529 _dbus_assert_not_reached ("failed to init string");
3534 if (!_dbus_string_append (&str, "a"))
3535 _dbus_assert_not_reached ("failed to append string to string\n");
3537 _dbus_assert (_dbus_string_get_length (&str) == i * 2 + 1);
3539 if (!_dbus_string_append_byte (&str, 'b'))
3540 _dbus_assert_not_reached ("failed to append byte to string\n");
3542 _dbus_assert (_dbus_string_get_length (&str) == i * 2 + 2);
3547 _dbus_string_free (&str);
3549 /* Check steal_data */
3551 if (!_dbus_string_init (&str))
3552 _dbus_assert_not_reached ("failed to init string");
3554 if (!_dbus_string_append (&str, "Hello World"))
3555 _dbus_assert_not_reached ("could not append to string");
3557 i = _dbus_string_get_length (&str);
3559 if (!_dbus_string_steal_data (&str, &s))
3560 _dbus_assert_not_reached ("failed to steal data");
3562 _dbus_assert (_dbus_string_get_length (&str) == 0);
3563 _dbus_assert (((int)strlen (s)) == i);
3569 if (!_dbus_string_append (&str, "Hello World"))
3570 _dbus_assert_not_reached ("could not append to string");
3572 i = _dbus_string_get_length (&str);
3574 if (!_dbus_string_init (&other))
3575 _dbus_assert_not_reached ("could not init string");
3577 if (!_dbus_string_move (&str, 0, &other, 0))
3578 _dbus_assert_not_reached ("could not move");
3580 _dbus_assert (_dbus_string_get_length (&str) == 0);
3581 _dbus_assert (_dbus_string_get_length (&other) == i);
3583 if (!_dbus_string_append (&str, "Hello World"))
3584 _dbus_assert_not_reached ("could not append to string");
3586 if (!_dbus_string_move (&str, 0, &other, _dbus_string_get_length (&other)))
3587 _dbus_assert_not_reached ("could not move");
3589 _dbus_assert (_dbus_string_get_length (&str) == 0);
3590 _dbus_assert (_dbus_string_get_length (&other) == i * 2);
3592 if (!_dbus_string_append (&str, "Hello World"))
3593 _dbus_assert_not_reached ("could not append to string");
3595 if (!_dbus_string_move (&str, 0, &other, _dbus_string_get_length (&other) / 2))
3596 _dbus_assert_not_reached ("could not move");
3598 _dbus_assert (_dbus_string_get_length (&str) == 0);
3599 _dbus_assert (_dbus_string_get_length (&other) == i * 3);
3601 _dbus_string_free (&other);
3605 if (!_dbus_string_append (&str, "Hello World"))
3606 _dbus_assert_not_reached ("could not append to string");
3608 i = _dbus_string_get_length (&str);
3610 if (!_dbus_string_init (&other))
3611 _dbus_assert_not_reached ("could not init string");
3613 if (!_dbus_string_copy (&str, 0, &other, 0))
3614 _dbus_assert_not_reached ("could not copy");
3616 _dbus_assert (_dbus_string_get_length (&str) == i);
3617 _dbus_assert (_dbus_string_get_length (&other) == i);
3619 if (!_dbus_string_copy (&str, 0, &other, _dbus_string_get_length (&other)))
3620 _dbus_assert_not_reached ("could not copy");
3622 _dbus_assert (_dbus_string_get_length (&str) == i);
3623 _dbus_assert (_dbus_string_get_length (&other) == i * 2);
3624 _dbus_assert (_dbus_string_equal_c_str (&other,
3625 "Hello WorldHello World"));
3627 if (!_dbus_string_copy (&str, 0, &other, _dbus_string_get_length (&other) / 2))
3628 _dbus_assert_not_reached ("could not copy");
3630 _dbus_assert (_dbus_string_get_length (&str) == i);
3631 _dbus_assert (_dbus_string_get_length (&other) == i * 3);
3632 _dbus_assert (_dbus_string_equal_c_str (&other,
3633 "Hello WorldHello WorldHello World"));
3635 _dbus_string_free (&str);
3636 _dbus_string_free (&other);
3640 if (!_dbus_string_init (&str))
3641 _dbus_assert_not_reached ("failed to init string");
3643 if (!_dbus_string_append (&str, "Hello World"))
3644 _dbus_assert_not_reached ("could not append to string");
3646 i = _dbus_string_get_length (&str);
3648 if (!_dbus_string_init (&other))
3649 _dbus_assert_not_reached ("could not init string");
3651 if (!_dbus_string_replace_len (&str, 0, _dbus_string_get_length (&str),
3652 &other, 0, _dbus_string_get_length (&other)))
3653 _dbus_assert_not_reached ("could not replace");
3655 _dbus_assert (_dbus_string_get_length (&str) == i);
3656 _dbus_assert (_dbus_string_get_length (&other) == i);
3657 _dbus_assert (_dbus_string_equal_c_str (&other, "Hello World"));
3659 if (!_dbus_string_replace_len (&str, 0, _dbus_string_get_length (&str),
3661 _dbus_assert_not_reached ("could not replace center space");
3663 _dbus_assert (_dbus_string_get_length (&str) == i);
3664 _dbus_assert (_dbus_string_get_length (&other) == i * 2 - 1);
3665 _dbus_assert (_dbus_string_equal_c_str (&other,
3666 "HelloHello WorldWorld"));
3669 if (!_dbus_string_replace_len (&str, 1, 1,
3671 _dbus_string_get_length (&other) - 1,
3673 _dbus_assert_not_reached ("could not replace end character");
3675 _dbus_assert (_dbus_string_get_length (&str) == i);
3676 _dbus_assert (_dbus_string_get_length (&other) == i * 2 - 1);
3677 _dbus_assert (_dbus_string_equal_c_str (&other,
3678 "HelloHello WorldWorle"));
3680 _dbus_string_free (&str);
3681 _dbus_string_free (&other);
3683 /* Check append/get unichar */
3685 if (!_dbus_string_init (&str))
3686 _dbus_assert_not_reached ("failed to init string");
3689 if (!_dbus_string_append_unichar (&str, 0xfffc))
3690 _dbus_assert_not_reached ("failed to append unichar");
3692 _dbus_string_get_unichar (&str, 0, &ch, &i);
3694 _dbus_assert (ch == 0xfffc);
3695 _dbus_assert (i == _dbus_string_get_length (&str));
3697 _dbus_string_free (&str);
3699 /* Check insert/set/get byte */
3701 if (!_dbus_string_init (&str))
3702 _dbus_assert_not_reached ("failed to init string");
3704 if (!_dbus_string_append (&str, "Hello"))
3705 _dbus_assert_not_reached ("failed to append Hello");
3707 _dbus_assert (_dbus_string_get_byte (&str, 0) == 'H');
3708 _dbus_assert (_dbus_string_get_byte (&str, 1) == 'e');
3709 _dbus_assert (_dbus_string_get_byte (&str, 2) == 'l');
3710 _dbus_assert (_dbus_string_get_byte (&str, 3) == 'l');
3711 _dbus_assert (_dbus_string_get_byte (&str, 4) == 'o');
3713 _dbus_string_set_byte (&str, 1, 'q');
3714 _dbus_assert (_dbus_string_get_byte (&str, 1) == 'q');
3716 if (!_dbus_string_insert_bytes (&str, 0, 1, 255))
3717 _dbus_assert_not_reached ("can't insert byte");
3719 if (!_dbus_string_insert_bytes (&str, 2, 4, 'Z'))
3720 _dbus_assert_not_reached ("can't insert byte");
3722 if (!_dbus_string_insert_bytes (&str, _dbus_string_get_length (&str), 1, 'W'))
3723 _dbus_assert_not_reached ("can't insert byte");
3725 _dbus_assert (_dbus_string_get_byte (&str, 0) == 255);
3726 _dbus_assert (_dbus_string_get_byte (&str, 1) == 'H');
3727 _dbus_assert (_dbus_string_get_byte (&str, 2) == 'Z');
3728 _dbus_assert (_dbus_string_get_byte (&str, 3) == 'Z');
3729 _dbus_assert (_dbus_string_get_byte (&str, 4) == 'Z');
3730 _dbus_assert (_dbus_string_get_byte (&str, 5) == 'Z');
3731 _dbus_assert (_dbus_string_get_byte (&str, 6) == 'q');
3732 _dbus_assert (_dbus_string_get_byte (&str, 7) == 'l');
3733 _dbus_assert (_dbus_string_get_byte (&str, 8) == 'l');
3734 _dbus_assert (_dbus_string_get_byte (&str, 9) == 'o');
3735 _dbus_assert (_dbus_string_get_byte (&str, 10) == 'W');
3737 _dbus_string_free (&str);
3739 /* Check append/parse int/double */
3741 if (!_dbus_string_init (&str))
3742 _dbus_assert_not_reached ("failed to init string");
3744 if (!_dbus_string_append_int (&str, 27))
3745 _dbus_assert_not_reached ("failed to append int");
3747 i = _dbus_string_get_length (&str);
3749 if (!_dbus_string_parse_int (&str, 0, &v, &end))
3750 _dbus_assert_not_reached ("failed to parse int");
3752 _dbus_assert (v == 27);
3753 _dbus_assert (end == i);
3755 _dbus_string_free (&str);
3757 if (!_dbus_string_init (&str))
3758 _dbus_assert_not_reached ("failed to init string");
3760 if (!_dbus_string_append_double (&str, 50.3))
3761 _dbus_assert_not_reached ("failed to append float");
3763 i = _dbus_string_get_length (&str);
3765 if (!_dbus_string_parse_double (&str, 0, &d, &end))
3766 _dbus_assert_not_reached ("failed to parse float");
3768 _dbus_assert (d > (50.3 - 1e-6) && d < (50.3 + 1e-6));
3769 _dbus_assert (end == i);
3771 _dbus_string_free (&str);
3774 if (!_dbus_string_init (&str))
3775 _dbus_assert_not_reached ("failed to init string");
3777 if (!_dbus_string_append (&str, "Hello"))
3778 _dbus_assert_not_reached ("couldn't append to string");
3780 if (!_dbus_string_find (&str, 0, "He", &i))
3781 _dbus_assert_not_reached ("didn't find 'He'");
3782 _dbus_assert (i == 0);
3784 if (!_dbus_string_find (&str, 0, "Hello", &i))
3785 _dbus_assert_not_reached ("didn't find 'Hello'");
3786 _dbus_assert (i == 0);
3788 if (!_dbus_string_find (&str, 0, "ello", &i))
3789 _dbus_assert_not_reached ("didn't find 'ello'");
3790 _dbus_assert (i == 1);
3792 if (!_dbus_string_find (&str, 0, "lo", &i))
3793 _dbus_assert_not_reached ("didn't find 'lo'");
3794 _dbus_assert (i == 3);
3796 if (!_dbus_string_find (&str, 2, "lo", &i))
3797 _dbus_assert_not_reached ("didn't find 'lo'");
3798 _dbus_assert (i == 3);
3800 if (_dbus_string_find (&str, 4, "lo", &i))
3801 _dbus_assert_not_reached ("did find 'lo'");
3803 if (!_dbus_string_find (&str, 0, "l", &i))
3804 _dbus_assert_not_reached ("didn't find 'l'");
3805 _dbus_assert (i == 2);
3807 if (!_dbus_string_find (&str, 0, "H", &i))
3808 _dbus_assert_not_reached ("didn't find 'H'");
3809 _dbus_assert (i == 0);
3811 if (!_dbus_string_find (&str, 0, "", &i))
3812 _dbus_assert_not_reached ("didn't find ''");
3813 _dbus_assert (i == 0);
3815 if (_dbus_string_find (&str, 0, "Hello!", NULL))
3816 _dbus_assert_not_reached ("Did find 'Hello!'");
3818 if (_dbus_string_find (&str, 0, "Oh, Hello", NULL))
3819 _dbus_assert_not_reached ("Did find 'Oh, Hello'");
3821 if (_dbus_string_find (&str, 0, "ill", NULL))
3822 _dbus_assert_not_reached ("Did find 'ill'");
3824 if (_dbus_string_find (&str, 0, "q", NULL))
3825 _dbus_assert_not_reached ("Did find 'q'");
3827 if (!_dbus_string_find_to (&str, 0, 2, "He", NULL))
3828 _dbus_assert_not_reached ("Didn't find 'He'");
3830 if (_dbus_string_find_to (&str, 0, 2, "Hello", NULL))
3831 _dbus_assert_not_reached ("Did find 'Hello'");
3833 if (!_dbus_string_find_byte_backward (&str, _dbus_string_get_length (&str), 'H', &i))
3834 _dbus_assert_not_reached ("Did not find 'H'");
3835 _dbus_assert (i == 0);
3837 if (!_dbus_string_find_byte_backward (&str, _dbus_string_get_length (&str), 'o', &i))
3838 _dbus_assert_not_reached ("Did not find 'o'");
3839 _dbus_assert (i == _dbus_string_get_length (&str) - 1);
3841 if (_dbus_string_find_byte_backward (&str, _dbus_string_get_length (&str) - 1, 'o', &i))
3842 _dbus_assert_not_reached ("Did find 'o'");
3843 _dbus_assert (i == -1);
3845 if (_dbus_string_find_byte_backward (&str, 1, 'e', &i))
3846 _dbus_assert_not_reached ("Did find 'e'");
3847 _dbus_assert (i == -1);
3849 if (!_dbus_string_find_byte_backward (&str, 2, 'e', &i))
3850 _dbus_assert_not_reached ("Didn't find 'e'");
3851 _dbus_assert (i == 1);
3853 _dbus_string_free (&str);
3855 /* Base 64 and Hex encoding */
3856 test_roundtrips (test_base64_roundtrip);
3857 test_roundtrips (test_hex_roundtrip);
3859 /* Path validation */
3861 while (i < (int) _DBUS_N_ELEMENTS (valid_paths))
3863 _dbus_string_init_const (&str, valid_paths[i]);
3865 if (!_dbus_string_validate_path (&str, 0,
3866 _dbus_string_get_length (&str)))
3868 _dbus_warn ("Path \"%s\" should have been valid\n", valid_paths[i]);
3869 _dbus_assert_not_reached ("invalid path");
3876 while (i < (int) _DBUS_N_ELEMENTS (invalid_paths))
3878 _dbus_string_init_const (&str, invalid_paths[i]);
3880 if (_dbus_string_validate_path (&str, 0,
3881 _dbus_string_get_length (&str)))
3883 _dbus_warn ("Path \"%s\" should have been invalid\n", invalid_paths[i]);
3884 _dbus_assert_not_reached ("valid path");
3890 /* Interface validation */
3892 while (i < (int) _DBUS_N_ELEMENTS (valid_interfaces))
3894 _dbus_string_init_const (&str, valid_interfaces[i]);
3896 if (!_dbus_string_validate_interface (&str, 0,
3897 _dbus_string_get_length (&str)))
3899 _dbus_warn ("Interface \"%s\" should have been valid\n", valid_interfaces[i]);
3900 _dbus_assert_not_reached ("invalid interface");
3907 while (i < (int) _DBUS_N_ELEMENTS (invalid_interfaces))
3909 _dbus_string_init_const (&str, invalid_interfaces[i]);
3911 if (_dbus_string_validate_interface (&str, 0,
3912 _dbus_string_get_length (&str)))
3914 _dbus_warn ("Interface \"%s\" should have been invalid\n", invalid_interfaces[i]);
3915 _dbus_assert_not_reached ("valid interface");
3921 /* Service validation (check that valid interfaces are valid services,
3922 * and invalid interfaces are invalid services except if they start with ':')
3925 while (i < (int) _DBUS_N_ELEMENTS (valid_interfaces))
3927 _dbus_string_init_const (&str, valid_interfaces[i]);
3929 if (!_dbus_string_validate_service (&str, 0,
3930 _dbus_string_get_length (&str)))
3932 _dbus_warn ("Service \"%s\" should have been valid\n", valid_interfaces[i]);
3933 _dbus_assert_not_reached ("invalid service");
3940 while (i < (int) _DBUS_N_ELEMENTS (invalid_interfaces))
3942 if (invalid_interfaces[i][0] != ':')
3944 _dbus_string_init_const (&str, invalid_interfaces[i]);
3946 if (_dbus_string_validate_service (&str, 0,
3947 _dbus_string_get_length (&str)))
3949 _dbus_warn ("Service \"%s\" should have been invalid\n", invalid_interfaces[i]);
3950 _dbus_assert_not_reached ("valid service");
3957 /* Base service validation */
3959 while (i < (int) _DBUS_N_ELEMENTS (valid_base_services))
3961 _dbus_string_init_const (&str, valid_base_services[i]);
3963 if (!_dbus_string_validate_service (&str, 0,
3964 _dbus_string_get_length (&str)))
3966 _dbus_warn ("Service \"%s\" should have been valid\n", valid_base_services[i]);
3967 _dbus_assert_not_reached ("invalid base service");
3974 while (i < (int) _DBUS_N_ELEMENTS (invalid_base_services))
3976 _dbus_string_init_const (&str, invalid_base_services[i]);
3978 if (_dbus_string_validate_service (&str, 0,
3979 _dbus_string_get_length (&str)))
3981 _dbus_warn ("Service \"%s\" should have been invalid\n", invalid_base_services[i]);
3982 _dbus_assert_not_reached ("valid base service");
3989 /* Error name validation (currently identical to interfaces)
3992 while (i < (int) _DBUS_N_ELEMENTS (valid_interfaces))
3994 _dbus_string_init_const (&str, valid_interfaces[i]);
3996 if (!_dbus_string_validate_error_name (&str, 0,
3997 _dbus_string_get_length (&str)))
3999 _dbus_warn ("Error name \"%s\" should have been valid\n", valid_interfaces[i]);
4000 _dbus_assert_not_reached ("invalid error name");
4007 while (i < (int) _DBUS_N_ELEMENTS (invalid_interfaces))
4009 if (invalid_interfaces[i][0] != ':')
4011 _dbus_string_init_const (&str, invalid_interfaces[i]);
4013 if (_dbus_string_validate_error_name (&str, 0,
4014 _dbus_string_get_length (&str)))
4016 _dbus_warn ("Error name \"%s\" should have been invalid\n", invalid_interfaces[i]);
4017 _dbus_assert_not_reached ("valid error name");
4024 /* Member validation */
4026 while (i < (int) _DBUS_N_ELEMENTS (valid_members))
4028 _dbus_string_init_const (&str, valid_members[i]);
4030 if (!_dbus_string_validate_member (&str, 0,
4031 _dbus_string_get_length (&str)))
4033 _dbus_warn ("Member \"%s\" should have been valid\n", valid_members[i]);
4034 _dbus_assert_not_reached ("invalid member");
4041 while (i < (int) _DBUS_N_ELEMENTS (invalid_members))
4043 _dbus_string_init_const (&str, invalid_members[i]);
4045 if (_dbus_string_validate_member (&str, 0,
4046 _dbus_string_get_length (&str)))
4048 _dbus_warn ("Member \"%s\" should have been invalid\n", invalid_members[i]);
4049 _dbus_assert_not_reached ("valid member");
4055 /* Validate claimed length longer than real length */
4056 _dbus_string_init_const (&str, "abc.efg");
4057 if (_dbus_string_validate_service (&str, 0, 8))
4058 _dbus_assert_not_reached ("validated too-long string");
4059 if (_dbus_string_validate_interface (&str, 0, 8))
4060 _dbus_assert_not_reached ("validated too-long string");
4061 if (_dbus_string_validate_error_name (&str, 0, 8))
4062 _dbus_assert_not_reached ("validated too-long string");
4064 _dbus_string_init_const (&str, "abc");
4065 if (_dbus_string_validate_member (&str, 0, 4))
4066 _dbus_assert_not_reached ("validated too-long string");
4068 /* Validate string exceeding max name length */
4069 if (!_dbus_string_init (&str))
4070 _dbus_assert_not_reached ("no memory");
4072 while (_dbus_string_get_length (&str) <= DBUS_MAXIMUM_NAME_LENGTH)
4073 if (!_dbus_string_append (&str, "abc.def"))
4074 _dbus_assert_not_reached ("no memory");
4076 if (_dbus_string_validate_service (&str, 0, _dbus_string_get_length (&str)))
4077 _dbus_assert_not_reached ("validated overmax string");
4078 if (_dbus_string_validate_interface (&str, 0, _dbus_string_get_length (&str)))
4079 _dbus_assert_not_reached ("validated overmax string");
4080 if (_dbus_string_validate_error_name (&str, 0, _dbus_string_get_length (&str)))
4081 _dbus_assert_not_reached ("validated overmax string");
4083 /* overlong member */
4084 _dbus_string_set_length (&str, 0);
4085 while (_dbus_string_get_length (&str) <= DBUS_MAXIMUM_NAME_LENGTH)
4086 if (!_dbus_string_append (&str, "abc"))
4087 _dbus_assert_not_reached ("no memory");
4089 if (_dbus_string_validate_member (&str, 0, _dbus_string_get_length (&str)))
4090 _dbus_assert_not_reached ("validated overmax string");
4092 /* overlong base service */
4093 _dbus_string_set_length (&str, 0);
4094 _dbus_string_append (&str, ":");
4095 while (_dbus_string_get_length (&str) <= DBUS_MAXIMUM_NAME_LENGTH)
4096 if (!_dbus_string_append (&str, "abc"))
4097 _dbus_assert_not_reached ("no memory");
4099 if (_dbus_string_validate_service (&str, 0, _dbus_string_get_length (&str)))
4100 _dbus_assert_not_reached ("validated overmax string");
4102 _dbus_string_free (&str);
4107 #endif /* DBUS_BUILD_TESTS */