00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024 #include "dbus-internals.h"
00025 #include "dbus-string.h"
00026
00027 #include <string.h>
00028
00029 #include <stdio.h>
00030 #define DBUS_CAN_USE_DBUS_STRING_PRIVATE 1
00031 #include "dbus-string-private.h"
00032 #include "dbus-marshal-basic.h"
00033
00034
00035
00036 #include "dbus-sysdeps.h"
00037
00076 static void
00077 fixup_alignment (DBusRealString *real)
00078 {
00079 unsigned char *aligned;
00080 unsigned char *real_block;
00081 unsigned int old_align_offset;
00082
00083
00084 _dbus_assert (real->len <= real->allocated - _DBUS_STRING_ALLOCATION_PADDING);
00085
00086 old_align_offset = real->align_offset;
00087 real_block = real->str - old_align_offset;
00088
00089 aligned = _DBUS_ALIGN_ADDRESS (real_block, 8);
00090
00091 real->align_offset = aligned - real_block;
00092 real->str = aligned;
00093
00094 if (old_align_offset != real->align_offset)
00095 {
00096
00097 memmove (real_block + real->align_offset,
00098 real_block + old_align_offset,
00099 real->len + 1);
00100 }
00101
00102 _dbus_assert (real->align_offset < 8);
00103 _dbus_assert (_DBUS_ALIGN_ADDRESS (real->str, 8) == real->str);
00104 }
00105
00106 static void
00107 undo_alignment (DBusRealString *real)
00108 {
00109 if (real->align_offset != 0)
00110 {
00111 memmove (real->str - real->align_offset,
00112 real->str,
00113 real->len + 1);
00114
00115 real->str = real->str - real->align_offset;
00116 real->align_offset = 0;
00117 }
00118 }
00119
00129 dbus_bool_t
00130 _dbus_string_init_preallocated (DBusString *str,
00131 int allocate_size)
00132 {
00133 DBusRealString *real;
00134
00135 _dbus_assert (str != NULL);
00136
00137 _dbus_assert (sizeof (DBusString) == sizeof (DBusRealString));
00138
00139 real = (DBusRealString*) str;
00140
00141
00142
00143
00144
00145
00146
00147 real->str = dbus_malloc (_DBUS_STRING_ALLOCATION_PADDING + allocate_size);
00148 if (real->str == NULL)
00149 return FALSE;
00150
00151 real->allocated = _DBUS_STRING_ALLOCATION_PADDING + allocate_size;
00152 real->len = 0;
00153 real->str[real->len] = '\0';
00154
00155 real->max_length = _DBUS_STRING_MAX_MAX_LENGTH;
00156 real->constant = FALSE;
00157 real->locked = FALSE;
00158 real->invalid = FALSE;
00159 real->align_offset = 0;
00160
00161 fixup_alignment (real);
00162
00163 return TRUE;
00164 }
00165
00173 dbus_bool_t
00174 _dbus_string_init (DBusString *str)
00175 {
00176 return _dbus_string_init_preallocated (str, 0);
00177 }
00178
00179 #ifdef DBUS_BUILD_TESTS
00180
00181
00182
00183
00184
00185
00186 static void
00187 set_max_length (DBusString *str,
00188 int max_length)
00189 {
00190 DBusRealString *real;
00191
00192 real = (DBusRealString*) str;
00193
00194 real->max_length = max_length;
00195 }
00196 #endif
00197
00207 void
00208 _dbus_string_init_const (DBusString *str,
00209 const char *value)
00210 {
00211 _dbus_assert (value != NULL);
00212
00213 _dbus_string_init_const_len (str, value,
00214 strlen (value));
00215 }
00216
00227 void
00228 _dbus_string_init_const_len (DBusString *str,
00229 const char *value,
00230 int len)
00231 {
00232 DBusRealString *real;
00233
00234 _dbus_assert (str != NULL);
00235 _dbus_assert (value != NULL);
00236 _dbus_assert (len <= _DBUS_STRING_MAX_MAX_LENGTH);
00237 _dbus_assert (len >= 0);
00238
00239 real = (DBusRealString*) str;
00240
00241 real->str = (unsigned char*) value;
00242 real->len = len;
00243 real->allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
00244 real->max_length = real->len + 1;
00245 real->constant = TRUE;
00246 real->locked = TRUE;
00247 real->invalid = FALSE;
00248 real->align_offset = 0;
00249
00250
00251
00252
00253 }
00254
00260 void
00261 _dbus_string_free (DBusString *str)
00262 {
00263 DBusRealString *real = (DBusRealString*) str;
00264 DBUS_GENERIC_STRING_PREAMBLE (real);
00265
00266 if (real->constant)
00267 return;
00268 dbus_free (real->str - real->align_offset);
00269
00270 real->invalid = TRUE;
00271 }
00272
00273 #ifdef DBUS_BUILD_TESTS
00274
00275
00276
00286 void
00287 _dbus_string_lock (DBusString *str)
00288 {
00289 DBUS_LOCKED_STRING_PREAMBLE (str);
00290
00291 real->locked = TRUE;
00292
00293
00294
00295
00296 #define MAX_WASTE 48
00297 if (real->allocated - MAX_WASTE > real->len)
00298 {
00299 unsigned char *new_str;
00300 int new_allocated;
00301
00302 new_allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
00303
00304 new_str = dbus_realloc (real->str - real->align_offset,
00305 new_allocated);
00306 if (new_str != NULL)
00307 {
00308 real->str = new_str + real->align_offset;
00309 real->allocated = new_allocated;
00310 fixup_alignment (real);
00311 }
00312 }
00313 }
00314 #endif
00315
00316 static dbus_bool_t
00317 reallocate_for_length (DBusRealString *real,
00318 int new_length)
00319 {
00320 int new_allocated;
00321 unsigned char *new_str;
00322
00323
00324
00325
00326 if (real->allocated > (_DBUS_STRING_MAX_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING) / 2)
00327 new_allocated = _DBUS_STRING_MAX_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING;
00328 else
00329 new_allocated = real->allocated * 2;
00330
00331
00332
00333
00334
00335
00336
00337
00338 #ifdef DBUS_DISABLE_ASSERT
00339 #else
00340 #ifdef DBUS_BUILD_TESTS
00341 new_allocated = 0;
00342
00343
00344 #endif
00345 #endif
00346
00347
00348 new_allocated = MAX (new_allocated,
00349 new_length + _DBUS_STRING_ALLOCATION_PADDING);
00350
00351 _dbus_assert (new_allocated >= real->allocated);
00352 new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
00353 if (_DBUS_UNLIKELY (new_str == NULL))
00354 return FALSE;
00355
00356 real->str = new_str + real->align_offset;
00357 real->allocated = new_allocated;
00358 fixup_alignment (real);
00359
00360 return TRUE;
00361 }
00362
00363 static dbus_bool_t
00364 set_length (DBusRealString *real,
00365 int new_length)
00366 {
00367
00368
00369
00370 if (_DBUS_UNLIKELY (new_length > real->max_length))
00371 return FALSE;
00372 else if (new_length > (real->allocated - _DBUS_STRING_ALLOCATION_PADDING) &&
00373 _DBUS_UNLIKELY (!reallocate_for_length (real, new_length)))
00374 return FALSE;
00375 else
00376 {
00377 real->len = new_length;
00378 real->str[new_length] = '\0';
00379 return TRUE;
00380 }
00381 }
00382
00383 static dbus_bool_t
00384 open_gap (int len,
00385 DBusRealString *dest,
00386 int insert_at)
00387 {
00388 if (len == 0)
00389 return TRUE;
00390
00391 if (len > dest->max_length - dest->len)
00392 return FALSE;
00393
00394 if (!set_length (dest, dest->len + len))
00395 return FALSE;
00396
00397 memmove (dest->str + insert_at + len,
00398 dest->str + insert_at,
00399 dest->len - len - insert_at);
00400
00401 return TRUE;
00402 }
00403
00404 #ifndef _dbus_string_get_data
00405
00416 char*
00417 _dbus_string_get_data (DBusString *str)
00418 {
00419 DBUS_STRING_PREAMBLE (str);
00420
00421 return (char*) real->str;
00422 }
00423 #endif
00424
00425
00426 #ifndef _dbus_string_get_const_data
00427
00433 const char*
00434 _dbus_string_get_const_data (const DBusString *str)
00435 {
00436 DBUS_CONST_STRING_PREAMBLE (str);
00437
00438 return (const char*) real->str;
00439 }
00440 #endif
00441
00455 char*
00456 _dbus_string_get_data_len (DBusString *str,
00457 int start,
00458 int len)
00459 {
00460 DBUS_STRING_PREAMBLE (str);
00461 _dbus_assert (start >= 0);
00462 _dbus_assert (len >= 0);
00463 _dbus_assert (start <= real->len);
00464 _dbus_assert (len <= real->len - start);
00465
00466 return (char*) real->str + start;
00467 }
00468
00469
00470 #ifndef _dbus_string_get_const_data_len
00471
00479 const char*
00480 _dbus_string_get_const_data_len (const DBusString *str,
00481 int start,
00482 int len)
00483 {
00484 DBUS_CONST_STRING_PREAMBLE (str);
00485 _dbus_assert (start >= 0);
00486 _dbus_assert (len >= 0);
00487 _dbus_assert (start <= real->len);
00488 _dbus_assert (len <= real->len - start);
00489
00490 return (const char*) real->str + start;
00491 }
00492 #endif
00493
00494
00495 #ifndef _dbus_string_set_byte
00496
00503 void
00504 _dbus_string_set_byte (DBusString *str,
00505 int i,
00506 unsigned char byte)
00507 {
00508 DBUS_STRING_PREAMBLE (str);
00509 _dbus_assert (i < real->len);
00510 _dbus_assert (i >= 0);
00511
00512 real->str[i] = byte;
00513 }
00514 #endif
00515
00516
00517 #ifndef _dbus_string_get_byte
00518
00527 unsigned char
00528 _dbus_string_get_byte (const DBusString *str,
00529 int start)
00530 {
00531 DBUS_CONST_STRING_PREAMBLE (str);
00532 _dbus_assert (start <= real->len);
00533 _dbus_assert (start >= 0);
00534
00535 return real->str[start];
00536 }
00537 #endif
00538
00549 dbus_bool_t
00550 _dbus_string_insert_bytes (DBusString *str,
00551 int i,
00552 int n_bytes,
00553 unsigned char byte)
00554 {
00555 DBUS_STRING_PREAMBLE (str);
00556 _dbus_assert (i <= real->len);
00557 _dbus_assert (i >= 0);
00558 _dbus_assert (n_bytes >= 0);
00559
00560 if (n_bytes == 0)
00561 return TRUE;
00562
00563 if (!open_gap (n_bytes, real, i))
00564 return FALSE;
00565
00566 memset (real->str + i, byte, n_bytes);
00567
00568 return TRUE;
00569 }
00570
00579 dbus_bool_t
00580 _dbus_string_insert_byte (DBusString *str,
00581 int i,
00582 unsigned char byte)
00583 {
00584 DBUS_STRING_PREAMBLE (str);
00585 _dbus_assert (i <= real->len);
00586 _dbus_assert (i >= 0);
00587
00588 if (!open_gap (1, real, i))
00589 return FALSE;
00590
00591 real->str[i] = byte;
00592
00593 return TRUE;
00594 }
00595
00606 dbus_bool_t
00607 _dbus_string_steal_data (DBusString *str,
00608 char **data_return)
00609 {
00610 int old_max_length;
00611 DBUS_STRING_PREAMBLE (str);
00612 _dbus_assert (data_return != NULL);
00613
00614 undo_alignment (real);
00615
00616 *data_return = (char*) real->str;
00617
00618 old_max_length = real->max_length;
00619
00620
00621 if (!_dbus_string_init (str))
00622 {
00623
00624 real->str = (unsigned char*) *data_return;
00625 *data_return = NULL;
00626 fixup_alignment (real);
00627 return FALSE;
00628 }
00629
00630 real->max_length = old_max_length;
00631
00632 return TRUE;
00633 }
00634
00635 #ifdef DBUS_BUILD_TESTS
00636
00651 dbus_bool_t
00652 _dbus_string_steal_data_len (DBusString *str,
00653 char **data_return,
00654 int start,
00655 int len)
00656 {
00657 DBusString dest;
00658 DBUS_STRING_PREAMBLE (str);
00659 _dbus_assert (data_return != NULL);
00660 _dbus_assert (start >= 0);
00661 _dbus_assert (len >= 0);
00662 _dbus_assert (start <= real->len);
00663 _dbus_assert (len <= real->len - start);
00664
00665 if (!_dbus_string_init (&dest))
00666 return FALSE;
00667
00668 set_max_length (&dest, real->max_length);
00669
00670 if (!_dbus_string_move_len (str, start, len, &dest, 0))
00671 {
00672 _dbus_string_free (&dest);
00673 return FALSE;
00674 }
00675
00676 _dbus_warn ("Broken code in _dbus_string_steal_data_len(), see @todo, FIXME\n");
00677 if (!_dbus_string_steal_data (&dest, data_return))
00678 {
00679 _dbus_string_free (&dest);
00680 return FALSE;
00681 }
00682
00683 _dbus_string_free (&dest);
00684 return TRUE;
00685 }
00686 #endif
00687
00695 dbus_bool_t
00696 _dbus_string_copy_data (const DBusString *str,
00697 char **data_return)
00698 {
00699 DBUS_CONST_STRING_PREAMBLE (str);
00700 _dbus_assert (data_return != NULL);
00701
00702 *data_return = dbus_malloc (real->len + 1);
00703 if (*data_return == NULL)
00704 return FALSE;
00705
00706 memcpy (*data_return, real->str, real->len + 1);
00707
00708 return TRUE;
00709 }
00710
00719 void
00720 _dbus_string_copy_to_buffer (const DBusString *str,
00721 char *buffer,
00722 int avail_len)
00723 {
00724 int copy_len;
00725 DBUS_CONST_STRING_PREAMBLE (str);
00726
00727 _dbus_assert (avail_len >= 0);
00728
00729 copy_len = MIN (avail_len, real->len+1);
00730 memcpy (buffer, real->str, copy_len);
00731 if (avail_len > 0 && avail_len == copy_len)
00732 buffer[avail_len-1] = '\0';
00733 }
00734
00735 #ifdef DBUS_BUILD_TESTS
00736
00745 dbus_bool_t
00746 _dbus_string_copy_data_len (const DBusString *str,
00747 char **data_return,
00748 int start,
00749 int len)
00750 {
00751 DBusString dest;
00752
00753 DBUS_CONST_STRING_PREAMBLE (str);
00754 _dbus_assert (data_return != NULL);
00755 _dbus_assert (start >= 0);
00756 _dbus_assert (len >= 0);
00757 _dbus_assert (start <= real->len);
00758 _dbus_assert (len <= real->len - start);
00759
00760 if (!_dbus_string_init (&dest))
00761 return FALSE;
00762
00763 set_max_length (&dest, real->max_length);
00764
00765 if (!_dbus_string_copy_len (str, start, len, &dest, 0))
00766 {
00767 _dbus_string_free (&dest);
00768 return FALSE;
00769 }
00770
00771 if (!_dbus_string_steal_data (&dest, data_return))
00772 {
00773 _dbus_string_free (&dest);
00774 return FALSE;
00775 }
00776
00777 _dbus_string_free (&dest);
00778 return TRUE;
00779 }
00780 #endif
00781
00782
00783 #ifndef _dbus_string_get_length
00784
00789 int
00790 _dbus_string_get_length (const DBusString *str)
00791 {
00792 DBUS_CONST_STRING_PREAMBLE (str);
00793
00794 return real->len;
00795 }
00796 #endif
00797
00810 dbus_bool_t
00811 _dbus_string_lengthen (DBusString *str,
00812 int additional_length)
00813 {
00814 DBUS_STRING_PREAMBLE (str);
00815 _dbus_assert (additional_length >= 0);
00816
00817 if (_DBUS_UNLIKELY (additional_length > real->max_length - real->len))
00818 return FALSE;
00819
00820 return set_length (real,
00821 real->len + additional_length);
00822 }
00823
00830 void
00831 _dbus_string_shorten (DBusString *str,
00832 int length_to_remove)
00833 {
00834 DBUS_STRING_PREAMBLE (str);
00835 _dbus_assert (length_to_remove >= 0);
00836 _dbus_assert (length_to_remove <= real->len);
00837
00838 set_length (real,
00839 real->len - length_to_remove);
00840 }
00841
00852 dbus_bool_t
00853 _dbus_string_set_length (DBusString *str,
00854 int length)
00855 {
00856 DBUS_STRING_PREAMBLE (str);
00857 _dbus_assert (length >= 0);
00858
00859 return set_length (real, length);
00860 }
00861
00862 static dbus_bool_t
00863 align_insert_point_then_open_gap (DBusString *str,
00864 int *insert_at_p,
00865 int alignment,
00866 int gap_size)
00867 {
00868 unsigned long new_len;
00869 unsigned long gap_pos;
00870 int insert_at;
00871 int delta;
00872 DBUS_STRING_PREAMBLE (str);
00873 _dbus_assert (alignment >= 1);
00874 _dbus_assert (alignment <= 8); /* it has to be a bug if > 8 */
00875
00876 insert_at = *insert_at_p;
00877
00878 _dbus_assert (insert_at <= real->len);
00879
00880 gap_pos = _DBUS_ALIGN_VALUE (insert_at, alignment);
00881 new_len = real->len + (gap_pos - insert_at) + gap_size;
00882
00883 if (_DBUS_UNLIKELY (new_len > (unsigned long) real->max_length))
00884 return FALSE;
00885
00886 delta = new_len - real->len;
00887 _dbus_assert (delta >= 0);
00888
00889 if (delta == 0)
00890 {
00891 _dbus_assert (((unsigned long) *insert_at_p) == gap_pos);
00892 return TRUE;
00893 }
00894
00895 if (_DBUS_UNLIKELY (!open_gap (new_len - real->len,
00896 real, insert_at)))
00897 return FALSE;
00898
00899
00900 if (gap_size < delta)
00901 {
00902 memset (&real->str[insert_at], '\0',
00903 gap_pos - insert_at);
00904 }
00905
00906 *insert_at_p = gap_pos;
00907
00908 return TRUE;
00909 }
00910
00911 static dbus_bool_t
00912 align_length_then_lengthen (DBusString *str,
00913 int alignment,
00914 int then_lengthen_by)
00915 {
00916 int insert_at;
00917
00918 insert_at = _dbus_string_get_length (str);
00919
00920 return align_insert_point_then_open_gap (str,
00921 &insert_at,
00922 alignment, then_lengthen_by);
00923 }
00924
00933 dbus_bool_t
00934 _dbus_string_align_length (DBusString *str,
00935 int alignment)
00936 {
00937 return align_length_then_lengthen (str, alignment, 0);
00938 }
00939
00949 dbus_bool_t
00950 _dbus_string_alloc_space (DBusString *str,
00951 int extra_bytes)
00952 {
00953 if (!_dbus_string_lengthen (str, extra_bytes))
00954 return FALSE;
00955 _dbus_string_shorten (str, extra_bytes);
00956
00957 return TRUE;
00958 }
00959
00960 static dbus_bool_t
00961 append (DBusRealString *real,
00962 const char *buffer,
00963 int buffer_len)
00964 {
00965 if (buffer_len == 0)
00966 return TRUE;
00967
00968 if (!_dbus_string_lengthen ((DBusString*)real, buffer_len))
00969 return FALSE;
00970
00971 memcpy (real->str + (real->len - buffer_len),
00972 buffer,
00973 buffer_len);
00974
00975 return TRUE;
00976 }
00977
00985 dbus_bool_t
00986 _dbus_string_append (DBusString *str,
00987 const char *buffer)
00988 {
00989 unsigned long buffer_len;
00990
00991 DBUS_STRING_PREAMBLE (str);
00992 _dbus_assert (buffer != NULL);
00993
00994 buffer_len = strlen (buffer);
00995 if (buffer_len > (unsigned long) real->max_length)
00996 return FALSE;
00997
00998 return append (real, buffer, buffer_len);
00999 }
01000
01002 #define ASSIGN_2_OCTETS(p, octets) \
01003 *((dbus_uint16_t*)(p)) = *((dbus_uint16_t*)(octets));
01004
01006 #define ASSIGN_4_OCTETS(p, octets) \
01007 *((dbus_uint32_t*)(p)) = *((dbus_uint32_t*)(octets));
01008
01009 #ifdef DBUS_HAVE_INT64
01010
01011 #define ASSIGN_8_OCTETS(p, octets) \
01012 *((dbus_uint64_t*)(p)) = *((dbus_uint64_t*)(octets));
01013 #else
01014
01015 #define ASSIGN_8_OCTETS(p, octets) \
01016 do { \
01017 unsigned char *b; \
01018 \
01019 b = p; \
01020 \
01021 *b++ = octets[0]; \
01022 *b++ = octets[1]; \
01023 *b++ = octets[2]; \
01024 *b++ = octets[3]; \
01025 *b++ = octets[4]; \
01026 *b++ = octets[5]; \
01027 *b++ = octets[6]; \
01028 *b++ = octets[7]; \
01029 _dbus_assert (b == p + 8); \
01030 } while (0)
01031 #endif
01032
01033 #ifdef DBUS_BUILD_TESTS
01034
01042 dbus_bool_t
01043 _dbus_string_append_4_aligned (DBusString *str,
01044 const unsigned char octets[4])
01045 {
01046 DBUS_STRING_PREAMBLE (str);
01047
01048 if (!align_length_then_lengthen (str, 4, 4))
01049 return FALSE;
01050
01051 ASSIGN_4_OCTETS (real->str + (real->len - 4), octets);
01052
01053 return TRUE;
01054 }
01055 #endif
01056
01057 #ifdef DBUS_BUILD_TESTS
01058
01066 dbus_bool_t
01067 _dbus_string_append_8_aligned (DBusString *str,
01068 const unsigned char octets[8])
01069 {
01070 DBUS_STRING_PREAMBLE (str);
01071
01072 if (!align_length_then_lengthen (str, 8, 8))
01073 return FALSE;
01074
01075 ASSIGN_8_OCTETS (real->str + (real->len - 8), octets);
01076
01077 return TRUE;
01078 }
01079 #endif
01080
01090 dbus_bool_t
01091 _dbus_string_insert_2_aligned (DBusString *str,
01092 int insert_at,
01093 const unsigned char octets[4])
01094 {
01095 DBUS_STRING_PREAMBLE (str);
01096
01097 if (!align_insert_point_then_open_gap (str, &insert_at, 2, 2))
01098 return FALSE;
01099
01100 ASSIGN_2_OCTETS (real->str + insert_at, octets);
01101
01102 return TRUE;
01103 }
01104
01114 dbus_bool_t
01115 _dbus_string_insert_4_aligned (DBusString *str,
01116 int insert_at,
01117 const unsigned char octets[4])
01118 {
01119 DBUS_STRING_PREAMBLE (str);
01120
01121 if (!align_insert_point_then_open_gap (str, &insert_at, 4, 4))
01122 return FALSE;
01123
01124 ASSIGN_4_OCTETS (real->str + insert_at, octets);
01125
01126 return TRUE;
01127 }
01128
01138 dbus_bool_t
01139 _dbus_string_insert_8_aligned (DBusString *str,
01140 int insert_at,
01141 const unsigned char octets[8])
01142 {
01143 DBUS_STRING_PREAMBLE (str);
01144
01145 if (!align_insert_point_then_open_gap (str, &insert_at, 8, 8))
01146 return FALSE;
01147
01148 _dbus_assert (_DBUS_ALIGN_VALUE (insert_at, 8) == (unsigned) insert_at);
01149
01150 ASSIGN_8_OCTETS (real->str + insert_at, octets);
01151
01152 return TRUE;
01153 }
01154
01155
01166 dbus_bool_t
01167 _dbus_string_insert_alignment (DBusString *str,
01168 int *insert_at,
01169 int alignment)
01170 {
01171 DBUS_STRING_PREAMBLE (str);
01172
01173 if (!align_insert_point_then_open_gap (str, insert_at, alignment, 0))
01174 return FALSE;
01175
01176 _dbus_assert (_DBUS_ALIGN_VALUE (*insert_at, alignment) == (unsigned) *insert_at);
01177
01178 return TRUE;
01179 }
01180
01190 dbus_bool_t
01191 _dbus_string_append_printf_valist (DBusString *str,
01192 const char *format,
01193 va_list args)
01194 {
01195 int len;
01196 char c;
01197 va_list args_copy;
01198
01199 DBUS_STRING_PREAMBLE (str);
01200
01201 DBUS_VA_COPY (args_copy, args);
01202
01203
01204 len = vsnprintf (&c, 1, format, args);
01205
01206 if (!_dbus_string_lengthen (str, len))
01207 {
01208
01209 va_end (args_copy);
01210 return FALSE;
01211 }
01212
01213 vsprintf ((char*) (real->str + (real->len - len)),
01214 format, args_copy);
01215
01216 va_end (args_copy);
01217
01218 return TRUE;
01219 }
01220
01229 dbus_bool_t
01230 _dbus_string_append_printf (DBusString *str,
01231 const char *format,
01232 ...)
01233 {
01234 va_list args;
01235 dbus_bool_t retval;
01236
01237 va_start (args, format);
01238 retval = _dbus_string_append_printf_valist (str, format, args);
01239 va_end (args);
01240
01241 return retval;
01242 }
01243
01252 dbus_bool_t
01253 _dbus_string_append_len (DBusString *str,
01254 const char *buffer,
01255 int len)
01256 {
01257 DBUS_STRING_PREAMBLE (str);
01258 _dbus_assert (buffer != NULL);
01259 _dbus_assert (len >= 0);
01260
01261 return append (real, buffer, len);
01262 }
01263
01272 dbus_bool_t
01273 _dbus_string_append_byte (DBusString *str,
01274 unsigned char byte)
01275 {
01276 DBUS_STRING_PREAMBLE (str);
01277
01278 if (!set_length (real, real->len + 1))
01279 return FALSE;
01280
01281 real->str[real->len-1] = byte;
01282
01283 return TRUE;
01284 }
01285
01286 #ifdef DBUS_BUILD_TESTS
01287
01294 dbus_bool_t
01295 _dbus_string_append_unichar (DBusString *str,
01296 dbus_unichar_t ch)
01297 {
01298 int len;
01299 int first;
01300 int i;
01301 unsigned char *out;
01302
01303 DBUS_STRING_PREAMBLE (str);
01304
01305
01306
01307 len = 0;
01308
01309 if (ch < 0x80)
01310 {
01311 first = 0;
01312 len = 1;
01313 }
01314 else if (ch < 0x800)
01315 {
01316 first = 0xc0;
01317 len = 2;
01318 }
01319 else if (ch < 0x10000)
01320 {
01321 first = 0xe0;
01322 len = 3;
01323 }
01324 else if (ch < 0x200000)
01325 {
01326 first = 0xf0;
01327 len = 4;
01328 }
01329 else if (ch < 0x4000000)
01330 {
01331 first = 0xf8;
01332 len = 5;
01333 }
01334 else
01335 {
01336 first = 0xfc;
01337 len = 6;
01338 }
01339
01340 if (len > (real->max_length - real->len))
01341 return FALSE;
01342
01343 if (!set_length (real, real->len + len))
01344 return FALSE;
01345
01346 out = real->str + (real->len - len);
01347
01348 for (i = len - 1; i > 0; --i)
01349 {
01350 out[i] = (ch & 0x3f) | 0x80;
01351 ch >>= 6;
01352 }
01353 out[0] = ch | first;
01354
01355 return TRUE;
01356 }
01357 #endif
01358
01359 static void
01360 delete (DBusRealString *real,
01361 int start,
01362 int len)
01363 {
01364 if (len == 0)
01365 return;
01366
01367 memmove (real->str + start, real->str + start + len, real->len - (start + len));
01368 real->len -= len;
01369 real->str[real->len] = '\0';
01370 }
01371
01381 void
01382 _dbus_string_delete (DBusString *str,
01383 int start,
01384 int len)
01385 {
01386 DBUS_STRING_PREAMBLE (str);
01387 _dbus_assert (start >= 0);
01388 _dbus_assert (len >= 0);
01389 _dbus_assert (start <= real->len);
01390 _dbus_assert (len <= real->len - start);
01391
01392 delete (real, start, len);
01393 }
01394
01395 static dbus_bool_t
01396 copy (DBusRealString *source,
01397 int start,
01398 int len,
01399 DBusRealString *dest,
01400 int insert_at)
01401 {
01402 if (len == 0)
01403 return TRUE;
01404
01405 if (!open_gap (len, dest, insert_at))
01406 return FALSE;
01407
01408 memmove (dest->str + insert_at,
01409 source->str + start,
01410 len);
01411
01412 return TRUE;
01413 }
01414
01424 #define DBUS_STRING_COPY_PREAMBLE(source, start, dest, insert_at) \
01425 DBusRealString *real_source = (DBusRealString*) source; \
01426 DBusRealString *real_dest = (DBusRealString*) dest; \
01427 _dbus_assert ((source) != (dest)); \
01428 DBUS_GENERIC_STRING_PREAMBLE (real_source); \
01429 DBUS_GENERIC_STRING_PREAMBLE (real_dest); \
01430 _dbus_assert (!real_dest->constant); \
01431 _dbus_assert (!real_dest->locked); \
01432 _dbus_assert ((start) >= 0); \
01433 _dbus_assert ((start) <= real_source->len); \
01434 _dbus_assert ((insert_at) >= 0); \
01435 _dbus_assert ((insert_at) <= real_dest->len)
01436
01447 dbus_bool_t
01448 _dbus_string_move (DBusString *source,
01449 int start,
01450 DBusString *dest,
01451 int insert_at)
01452 {
01453 DBusRealString *real_source = (DBusRealString*) source;
01454 _dbus_assert (start <= real_source->len);
01455
01456 return _dbus_string_move_len (source, start,
01457 real_source->len - start,
01458 dest, insert_at);
01459 }
01460
01471 dbus_bool_t
01472 _dbus_string_copy (const DBusString *source,
01473 int start,
01474 DBusString *dest,
01475 int insert_at)
01476 {
01477 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
01478
01479 return copy (real_source, start,
01480 real_source->len - start,
01481 real_dest,
01482 insert_at);
01483 }
01484
01499 dbus_bool_t
01500 _dbus_string_move_len (DBusString *source,
01501 int start,
01502 int len,
01503 DBusString *dest,
01504 int insert_at)
01505
01506 {
01507 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
01508 _dbus_assert (len >= 0);
01509 _dbus_assert ((start + len) <= real_source->len);
01510
01511
01512 if (len == 0)
01513 {
01514 return TRUE;
01515 }
01516 else if (start == 0 &&
01517 len == real_source->len &&
01518 real_dest->len == 0)
01519 {
01520
01521
01522
01523
01524
01525
01526 #define ASSIGN_DATA(a, b) do { \
01527 (a)->str = (b)->str; \
01528 (a)->len = (b)->len; \
01529 (a)->allocated = (b)->allocated; \
01530 (a)->align_offset = (b)->align_offset; \
01531 } while (0)
01532
01533 DBusRealString tmp;
01534
01535 ASSIGN_DATA (&tmp, real_source);
01536 ASSIGN_DATA (real_source, real_dest);
01537 ASSIGN_DATA (real_dest, &tmp);
01538
01539 return TRUE;
01540 }
01541 else
01542 {
01543 if (!copy (real_source, start, len,
01544 real_dest,
01545 insert_at))
01546 return FALSE;
01547
01548 delete (real_source, start,
01549 len);
01550
01551 return TRUE;
01552 }
01553 }
01554
01566 dbus_bool_t
01567 _dbus_string_copy_len (const DBusString *source,
01568 int start,
01569 int len,
01570 DBusString *dest,
01571 int insert_at)
01572 {
01573 DBUS_STRING_COPY_PREAMBLE (source, start, dest, insert_at);
01574 _dbus_assert (len >= 0);
01575 _dbus_assert (start <= real_source->len);
01576 _dbus_assert (len <= real_source->len - start);
01577
01578 return copy (real_source, start, len,
01579 real_dest,
01580 insert_at);
01581 }
01582
01604 dbus_bool_t
01605 _dbus_string_replace_len (const DBusString *source,
01606 int start,
01607 int len,
01608 DBusString *dest,
01609 int replace_at,
01610 int replace_len)
01611 {
01612 DBUS_STRING_COPY_PREAMBLE (source, start, dest, replace_at);
01613 _dbus_assert (len >= 0);
01614 _dbus_assert (start <= real_source->len);
01615 _dbus_assert (len <= real_source->len - start);
01616 _dbus_assert (replace_at >= 0);
01617 _dbus_assert (replace_at <= real_dest->len);
01618 _dbus_assert (replace_len <= real_dest->len - replace_at);
01619
01620 if (!copy (real_source, start, len,
01621 real_dest, replace_at))
01622 return FALSE;
01623
01624 delete (real_dest, replace_at + len, replace_len);
01625
01626 return TRUE;
01627 }
01628
01629
01630
01631
01632
01638 #define UTF8_COMPUTE(Char, Mask, Len) \
01639 if (Char < 128) \
01640 { \
01641 Len = 1; \
01642 Mask = 0x7f; \
01643 } \
01644 else if ((Char & 0xe0) == 0xc0) \
01645 { \
01646 Len = 2; \
01647 Mask = 0x1f; \
01648 } \
01649 else if ((Char & 0xf0) == 0xe0) \
01650 { \
01651 Len = 3; \
01652 Mask = 0x0f; \
01653 } \
01654 else if ((Char & 0xf8) == 0xf0) \
01655 { \
01656 Len = 4; \
01657 Mask = 0x07; \
01658 } \
01659 else if ((Char & 0xfc) == 0xf8) \
01660 { \
01661 Len = 5; \
01662 Mask = 0x03; \
01663 } \
01664 else if ((Char & 0xfe) == 0xfc) \
01665 { \
01666 Len = 6; \
01667 Mask = 0x01; \
01668 } \
01669 else \
01670 { \
01671 Len = 0; \
01672 Mask = 0; \
01673 }
01674
01679 #define UTF8_LENGTH(Char) \
01680 ((Char) < 0x80 ? 1 : \
01681 ((Char) < 0x800 ? 2 : \
01682 ((Char) < 0x10000 ? 3 : \
01683 ((Char) < 0x200000 ? 4 : \
01684 ((Char) < 0x4000000 ? 5 : 6)))))
01685
01695 #define UTF8_GET(Result, Chars, Count, Mask, Len) \
01696 (Result) = (Chars)[0] & (Mask); \
01697 for ((Count) = 1; (Count) < (Len); ++(Count)) \
01698 { \
01699 if (((Chars)[(Count)] & 0xc0) != 0x80) \
01700 { \
01701 (Result) = -1; \
01702 break; \
01703 } \
01704 (Result) <<= 6; \
01705 (Result) |= ((Chars)[(Count)] & 0x3f); \
01706 }
01707
01713 #define UNICODE_VALID(Char) \
01714 ((Char) < 0x110000 && \
01715 (((Char) & 0xFFFFF800) != 0xD800) && \
01716 ((Char) < 0xFDD0 || (Char) > 0xFDEF) && \
01717 ((Char) & 0xFFFF) != 0xFFFF)
01718
01719 #ifdef DBUS_BUILD_TESTS
01720
01730 void
01731 _dbus_string_get_unichar (const DBusString *str,
01732 int start,
01733 dbus_unichar_t *ch_return,
01734 int *end_return)
01735 {
01736 int i, mask, len;
01737 dbus_unichar_t result;
01738 unsigned char c;
01739 unsigned char *p;
01740 DBUS_CONST_STRING_PREAMBLE (str);
01741 _dbus_assert (start >= 0);
01742 _dbus_assert (start <= real->len);
01743
01744 if (ch_return)
01745 *ch_return = 0;
01746 if (end_return)
01747 *end_return = real->len;
01748
01749 mask = 0;
01750 p = real->str + start;
01751 c = *p;
01752
01753 UTF8_COMPUTE (c, mask, len);
01754 if (len == 0)
01755 return;
01756 UTF8_GET (result, p, i, mask, len);
01757
01758 if (result == (dbus_unichar_t)-1)
01759 return;
01760
01761 if (ch_return)
01762 *ch_return = result;
01763 if (end_return)
01764 *end_return = start + len;
01765 }
01766 #endif
01767
01782 dbus_bool_t
01783 _dbus_string_find (const DBusString *str,
01784 int start,
01785 const char *substr,
01786 int *found)
01787 {
01788 return _dbus_string_find_to (str, start,
01789 ((const DBusRealString*)str)->len,
01790 substr, found);
01791 }
01792
01809 dbus_bool_t
01810 _dbus_string_find_to (const DBusString *str,
01811 int start,
01812 int end,
01813 const char *substr,
01814 int *found)
01815 {
01816 int i;
01817 DBUS_CONST_STRING_PREAMBLE (str);
01818 _dbus_assert (substr != NULL);
01819 _dbus_assert (start <= real->len);
01820 _dbus_assert (start >= 0);
01821 _dbus_assert (substr != NULL);
01822 _dbus_assert (end <= real->len);
01823 _dbus_assert (start <= end);
01824
01825
01826 if (*substr == '\0')
01827 {
01828 if (found)
01829 *found = start;
01830 return TRUE;
01831 }
01832
01833 i = start;
01834 while (i < end)
01835 {
01836 if (real->str[i] == substr[0])
01837 {
01838 int j = i + 1;
01839
01840 while (j < end)
01841 {
01842 if (substr[j - i] == '\0')
01843 break;
01844 else if (real->str[j] != substr[j - i])
01845 break;
01846
01847 ++j;
01848 }
01849
01850 if (substr[j - i] == '\0')
01851 {
01852 if (found)
01853 *found = i;
01854 return TRUE;
01855 }
01856 }
01857
01858 ++i;
01859 }
01860
01861 if (found)
01862 *found = end;
01863
01864 return FALSE;
01865 }
01866
01877 dbus_bool_t
01878 _dbus_string_find_blank (const DBusString *str,
01879 int start,
01880 int *found)
01881 {
01882 int i;
01883 DBUS_CONST_STRING_PREAMBLE (str);
01884 _dbus_assert (start <= real->len);
01885 _dbus_assert (start >= 0);
01886
01887 i = start;
01888 while (i < real->len)
01889 {
01890 if (real->str[i] == ' ' ||
01891 real->str[i] == '\t')
01892 {
01893 if (found)
01894 *found = i;
01895 return TRUE;
01896 }
01897
01898 ++i;
01899 }
01900
01901 if (found)
01902 *found = real->len;
01903
01904 return FALSE;
01905 }
01906
01915 void
01916 _dbus_string_skip_blank (const DBusString *str,
01917 int start,
01918 int *end)
01919 {
01920 int i;
01921 DBUS_CONST_STRING_PREAMBLE (str);
01922 _dbus_assert (start <= real->len);
01923 _dbus_assert (start >= 0);
01924
01925 i = start;
01926 while (i < real->len)
01927 {
01928 if (!(real->str[i] == ' ' ||
01929 real->str[i] == '\t'))
01930 break;
01931
01932 ++i;
01933 }
01934
01935 _dbus_assert (i == real->len || !(real->str[i] == ' ' ||
01936 real->str[i] == '\t'));
01937
01938 if (end)
01939 *end = i;
01940 }
01941
01957 dbus_bool_t
01958 _dbus_string_pop_line (DBusString *source,
01959 DBusString *dest)
01960 {
01961 int eol;
01962 dbus_bool_t have_newline;
01963
01964 _dbus_string_set_length (dest, 0);
01965
01966 eol = 0;
01967 if (_dbus_string_find (source, 0, "\n", &eol))
01968 {
01969 have_newline = TRUE;
01970 eol += 1;
01971 }
01972 else
01973 {
01974 eol = _dbus_string_get_length (source);
01975 have_newline = FALSE;
01976 }
01977
01978 if (eol == 0)
01979 return FALSE;
01980
01981 if (!_dbus_string_move_len (source, 0, eol,
01982 dest, 0))
01983 {
01984 return FALSE;
01985 }
01986
01987
01988 if (have_newline)
01989 {
01990 dbus_bool_t have_cr;
01991
01992 _dbus_assert (_dbus_string_get_length (dest) > 0);
01993
01994 if (_dbus_string_get_length (dest) > 1 &&
01995 _dbus_string_get_byte (dest,
01996 _dbus_string_get_length (dest) - 2) == '\r')
01997 have_cr = TRUE;
01998 else
01999 have_cr = FALSE;
02000
02001 _dbus_string_set_length (dest,
02002 _dbus_string_get_length (dest) -
02003 (have_cr ? 2 : 1));
02004 }
02005
02006 return TRUE;
02007 }
02008
02009 #ifdef DBUS_BUILD_TESTS
02010
02016 void
02017 _dbus_string_delete_first_word (DBusString *str)
02018 {
02019 int i;
02020
02021 if (_dbus_string_find_blank (str, 0, &i))
02022 _dbus_string_skip_blank (str, i, &i);
02023
02024 _dbus_string_delete (str, 0, i);
02025 }
02026 #endif
02027
02028 #ifdef DBUS_BUILD_TESTS
02029
02034 void
02035 _dbus_string_delete_leading_blanks (DBusString *str)
02036 {
02037 int i;
02038
02039 _dbus_string_skip_blank (str, 0, &i);
02040
02041 if (i > 0)
02042 _dbus_string_delete (str, 0, i);
02043 }
02044 #endif
02045
02055 dbus_bool_t
02056 _dbus_string_equal (const DBusString *a,
02057 const DBusString *b)
02058 {
02059 const unsigned char *ap;
02060 const unsigned char *bp;
02061 const unsigned char *a_end;
02062 const DBusRealString *real_a = (const DBusRealString*) a;
02063 const DBusRealString *real_b = (const DBusRealString*) b;
02064 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02065 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02066
02067 if (real_a->len != real_b->len)
02068 return FALSE;
02069
02070 ap = real_a->str;
02071 bp = real_b->str;
02072 a_end = real_a->str + real_a->len;
02073 while (ap != a_end)
02074 {
02075 if (*ap != *bp)
02076 return FALSE;
02077
02078 ++ap;
02079 ++bp;
02080 }
02081
02082 return TRUE;
02083 }
02084
02085 #ifdef DBUS_BUILD_TESTS
02086
02099 dbus_bool_t
02100 _dbus_string_equal_len (const DBusString *a,
02101 const DBusString *b,
02102 int len)
02103 {
02104 const unsigned char *ap;
02105 const unsigned char *bp;
02106 const unsigned char *a_end;
02107 const DBusRealString *real_a = (const DBusRealString*) a;
02108 const DBusRealString *real_b = (const DBusRealString*) b;
02109 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02110 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02111
02112 if (real_a->len != real_b->len &&
02113 (real_a->len < len || real_b->len < len))
02114 return FALSE;
02115
02116 ap = real_a->str;
02117 bp = real_b->str;
02118 a_end = real_a->str + MIN (real_a->len, len);
02119 while (ap != a_end)
02120 {
02121 if (*ap != *bp)
02122 return FALSE;
02123
02124 ++ap;
02125 ++bp;
02126 }
02127
02128 return TRUE;
02129 }
02130 #endif
02131
02148 dbus_bool_t
02149 _dbus_string_equal_substring (const DBusString *a,
02150 int a_start,
02151 int a_len,
02152 const DBusString *b,
02153 int b_start)
02154 {
02155 const unsigned char *ap;
02156 const unsigned char *bp;
02157 const unsigned char *a_end;
02158 const DBusRealString *real_a = (const DBusRealString*) a;
02159 const DBusRealString *real_b = (const DBusRealString*) b;
02160 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02161 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02162 _dbus_assert (a_start >= 0);
02163 _dbus_assert (a_len >= 0);
02164 _dbus_assert (a_start <= real_a->len);
02165 _dbus_assert (a_len <= real_a->len - a_start);
02166 _dbus_assert (b_start >= 0);
02167 _dbus_assert (b_start <= real_b->len);
02168
02169 if (a_len > real_b->len - b_start)
02170 return FALSE;
02171
02172 ap = real_a->str + a_start;
02173 bp = real_b->str + b_start;
02174 a_end = ap + a_len;
02175 while (ap != a_end)
02176 {
02177 if (*ap != *bp)
02178 return FALSE;
02179
02180 ++ap;
02181 ++bp;
02182 }
02183
02184 _dbus_assert (bp <= (real_b->str + real_b->len));
02185
02186 return TRUE;
02187 }
02188
02196 dbus_bool_t
02197 _dbus_string_equal_c_str (const DBusString *a,
02198 const char *c_str)
02199 {
02200 const unsigned char *ap;
02201 const unsigned char *bp;
02202 const unsigned char *a_end;
02203 const DBusRealString *real_a = (const DBusRealString*) a;
02204 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02205 _dbus_assert (c_str != NULL);
02206
02207 ap = real_a->str;
02208 bp = (const unsigned char*) c_str;
02209 a_end = real_a->str + real_a->len;
02210 while (ap != a_end && *bp)
02211 {
02212 if (*ap != *bp)
02213 return FALSE;
02214
02215 ++ap;
02216 ++bp;
02217 }
02218
02219 if (ap != a_end || *bp)
02220 return FALSE;
02221
02222 return TRUE;
02223 }
02224
02225 #ifdef DBUS_BUILD_TESTS
02226
02233 dbus_bool_t
02234 _dbus_string_starts_with_c_str (const DBusString *a,
02235 const char *c_str)
02236 {
02237 const unsigned char *ap;
02238 const unsigned char *bp;
02239 const unsigned char *a_end;
02240 const DBusRealString *real_a = (const DBusRealString*) a;
02241 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02242 _dbus_assert (c_str != NULL);
02243
02244 ap = real_a->str;
02245 bp = (const unsigned char*) c_str;
02246 a_end = real_a->str + real_a->len;
02247 while (ap != a_end && *bp)
02248 {
02249 if (*ap != *bp)
02250 return FALSE;
02251
02252 ++ap;
02253 ++bp;
02254 }
02255
02256 if (*bp == '\0')
02257 return TRUE;
02258 else
02259 return FALSE;
02260 }
02261 #endif
02262
02271 dbus_bool_t
02272 _dbus_string_append_byte_as_hex (DBusString *str,
02273 int byte)
02274 {
02275 const char hexdigits[16] = {
02276 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
02277 'a', 'b', 'c', 'd', 'e', 'f'
02278 };
02279
02280 if (!_dbus_string_append_byte (str,
02281 hexdigits[(byte >> 4)]))
02282 return FALSE;
02283
02284 if (!_dbus_string_append_byte (str,
02285 hexdigits[(byte & 0x0f)]))
02286 {
02287 _dbus_string_set_length (str,
02288 _dbus_string_get_length (str) - 1);
02289 return FALSE;
02290 }
02291
02292 return TRUE;
02293 }
02294
02305 dbus_bool_t
02306 _dbus_string_hex_encode (const DBusString *source,
02307 int start,
02308 DBusString *dest,
02309 int insert_at)
02310 {
02311 DBusString result;
02312 const unsigned char *p;
02313 const unsigned char *end;
02314 dbus_bool_t retval;
02315
02316 _dbus_assert (start <= _dbus_string_get_length (source));
02317
02318 if (!_dbus_string_init (&result))
02319 return FALSE;
02320
02321 retval = FALSE;
02322
02323 p = (const unsigned char*) _dbus_string_get_const_data (source);
02324 end = p + _dbus_string_get_length (source);
02325 p += start;
02326
02327 while (p != end)
02328 {
02329 if (!_dbus_string_append_byte_as_hex (&result, *p))
02330 goto out;
02331
02332 ++p;
02333 }
02334
02335 if (!_dbus_string_move (&result, 0, dest, insert_at))
02336 goto out;
02337
02338 retval = TRUE;
02339
02340 out:
02341 _dbus_string_free (&result);
02342 return retval;
02343 }
02344
02355 dbus_bool_t
02356 _dbus_string_hex_decode (const DBusString *source,
02357 int start,
02358 int *end_return,
02359 DBusString *dest,
02360 int insert_at)
02361 {
02362 DBusString result;
02363 const unsigned char *p;
02364 const unsigned char *end;
02365 dbus_bool_t retval;
02366 dbus_bool_t high_bits;
02367
02368 _dbus_assert (start <= _dbus_string_get_length (source));
02369
02370 if (!_dbus_string_init (&result))
02371 return FALSE;
02372
02373 retval = FALSE;
02374
02375 high_bits = TRUE;
02376 p = (const unsigned char*) _dbus_string_get_const_data (source);
02377 end = p + _dbus_string_get_length (source);
02378 p += start;
02379
02380 while (p != end)
02381 {
02382 unsigned int val;
02383
02384 switch (*p)
02385 {
02386 case '0':
02387 val = 0;
02388 break;
02389 case '1':
02390 val = 1;
02391 break;
02392 case '2':
02393 val = 2;
02394 break;
02395 case '3':
02396 val = 3;
02397 break;
02398 case '4':
02399 val = 4;
02400 break;
02401 case '5':
02402 val = 5;
02403 break;
02404 case '6':
02405 val = 6;
02406 break;
02407 case '7':
02408 val = 7;
02409 break;
02410 case '8':
02411 val = 8;
02412 break;
02413 case '9':
02414 val = 9;
02415 break;
02416 case 'a':
02417 case 'A':
02418 val = 10;
02419 break;
02420 case 'b':
02421 case 'B':
02422 val = 11;
02423 break;
02424 case 'c':
02425 case 'C':
02426 val = 12;
02427 break;
02428 case 'd':
02429 case 'D':
02430 val = 13;
02431 break;
02432 case 'e':
02433 case 'E':
02434 val = 14;
02435 break;
02436 case 'f':
02437 case 'F':
02438 val = 15;
02439 break;
02440 default:
02441 goto done;
02442 }
02443
02444 if (high_bits)
02445 {
02446 if (!_dbus_string_append_byte (&result,
02447 val << 4))
02448 goto out;
02449 }
02450 else
02451 {
02452 int len;
02453 unsigned char b;
02454
02455 len = _dbus_string_get_length (&result);
02456
02457 b = _dbus_string_get_byte (&result, len - 1);
02458
02459 b |= val;
02460
02461 _dbus_string_set_byte (&result, len - 1, b);
02462 }
02463
02464 high_bits = !high_bits;
02465
02466 ++p;
02467 }
02468
02469 done:
02470 if (!_dbus_string_move (&result, 0, dest, insert_at))
02471 goto out;
02472
02473 if (end_return)
02474 *end_return = p - (const unsigned char*) _dbus_string_get_const_data (source);
02475
02476 retval = TRUE;
02477
02478 out:
02479 _dbus_string_free (&result);
02480 return retval;
02481 }
02482
02496 dbus_bool_t
02497 _dbus_string_validate_ascii (const DBusString *str,
02498 int start,
02499 int len)
02500 {
02501 const unsigned char *s;
02502 const unsigned char *end;
02503 DBUS_CONST_STRING_PREAMBLE (str);
02504 _dbus_assert (start >= 0);
02505 _dbus_assert (start <= real->len);
02506 _dbus_assert (len >= 0);
02507
02508 if (len > real->len - start)
02509 return FALSE;
02510
02511 s = real->str + start;
02512 end = s + len;
02513 while (s != end)
02514 {
02515 if (_DBUS_UNLIKELY (!_DBUS_ISASCII (*s)))
02516 return FALSE;
02517
02518 ++s;
02519 }
02520
02521 return TRUE;
02522 }
02523
02539 dbus_bool_t
02540 _dbus_string_validate_utf8 (const DBusString *str,
02541 int start,
02542 int len)
02543 {
02544 const unsigned char *p;
02545 const unsigned char *end;
02546 DBUS_CONST_STRING_PREAMBLE (str);
02547 _dbus_assert (start >= 0);
02548 _dbus_assert (start <= real->len);
02549 _dbus_assert (len >= 0);
02550
02551
02552
02553
02554
02555
02556
02557
02558
02559 if (_DBUS_UNLIKELY (len > real->len - start))
02560 return FALSE;
02561
02562 p = real->str + start;
02563 end = p + len;
02564
02565 while (p < end)
02566 {
02567 int i, mask, char_len;
02568 dbus_unichar_t result;
02569
02570
02571 if (*p == '\0')
02572 break;
02573
02574
02575
02576
02577
02578
02579
02580 if (*p < 128)
02581 {
02582 ++p;
02583 continue;
02584 }
02585
02586 UTF8_COMPUTE (*p, mask, char_len);
02587
02588 if (_DBUS_UNLIKELY (char_len == 0))
02589 break;
02590
02591
02592 if (_DBUS_UNLIKELY ((end - p) < char_len))
02593 break;
02594
02595 UTF8_GET (result, p, i, mask, char_len);
02596
02597
02598 if (_DBUS_UNLIKELY (UTF8_LENGTH (result) != char_len))
02599 break;
02600 #if 0
02601
02602 if (_DBUS_UNLIKELY (result == (dbus_unichar_t)-1))
02603 break;
02604 #endif
02605
02606 if (_DBUS_UNLIKELY (!UNICODE_VALID (result)))
02607 break;
02608
02609
02610 _dbus_assert (result != (dbus_unichar_t)-1);
02611
02612 p += char_len;
02613 }
02614
02615
02616
02617
02618 if (_DBUS_UNLIKELY (p != end))
02619 return FALSE;
02620 else
02621 return TRUE;
02622 }
02623
02637 dbus_bool_t
02638 _dbus_string_validate_nul (const DBusString *str,
02639 int start,
02640 int len)
02641 {
02642 const unsigned char *s;
02643 const unsigned char *end;
02644 DBUS_CONST_STRING_PREAMBLE (str);
02645 _dbus_assert (start >= 0);
02646 _dbus_assert (len >= 0);
02647 _dbus_assert (start <= real->len);
02648
02649 if (len > real->len - start)
02650 return FALSE;
02651
02652 s = real->str + start;
02653 end = s + len;
02654 while (s != end)
02655 {
02656 if (_DBUS_UNLIKELY (*s != '\0'))
02657 return FALSE;
02658 ++s;
02659 }
02660
02661 return TRUE;
02662 }
02663
02669 void
02670 _dbus_string_zero (DBusString *str)
02671 {
02672 DBUS_STRING_PREAMBLE (str);
02673
02674 memset (real->str - real->align_offset, '\0', real->allocated);
02675 }
02678