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00025 #include "dbus-internals.h"
00026 #include "dbus-string.h"
00027
00028 #include <string.h>
00029
00030 #include <stdio.h>
00031 #define DBUS_CAN_USE_DBUS_STRING_PRIVATE 1
00032 #include "dbus-string-private.h"
00033 #include "dbus-marshal-basic.h"
00034
00035
00036
00037 #include "dbus-sysdeps.h"
00038
00077 static void
00078 fixup_alignment (DBusRealString *real)
00079 {
00080 unsigned char *aligned;
00081 unsigned char *real_block;
00082 unsigned int old_align_offset;
00083
00084
00085 _dbus_assert (real->len <= real->allocated - _DBUS_STRING_ALLOCATION_PADDING);
00086
00087 old_align_offset = real->align_offset;
00088 real_block = real->str - old_align_offset;
00089
00090 aligned = _DBUS_ALIGN_ADDRESS (real_block, 8);
00091
00092 real->align_offset = aligned - real_block;
00093 real->str = aligned;
00094
00095 if (old_align_offset != real->align_offset)
00096 {
00097
00098 memmove (real_block + real->align_offset,
00099 real_block + old_align_offset,
00100 real->len + 1);
00101 }
00102
00103 _dbus_assert (real->align_offset < 8);
00104 _dbus_assert (_DBUS_ALIGN_ADDRESS (real->str, 8) == real->str);
00105 }
00106
00107 static void
00108 undo_alignment (DBusRealString *real)
00109 {
00110 if (real->align_offset != 0)
00111 {
00112 memmove (real->str - real->align_offset,
00113 real->str,
00114 real->len + 1);
00115
00116 real->str = real->str - real->align_offset;
00117 real->align_offset = 0;
00118 }
00119 }
00120
00130 dbus_bool_t
00131 _dbus_string_init_preallocated (DBusString *str,
00132 int allocate_size)
00133 {
00134 DBusRealString *real;
00135
00136 _dbus_assert (str != NULL);
00137
00138 _dbus_assert (sizeof (DBusString) == sizeof (DBusRealString));
00139
00140 real = (DBusRealString*) str;
00141
00142
00143
00144
00145
00146
00147
00148 real->str = dbus_malloc (_DBUS_STRING_ALLOCATION_PADDING + allocate_size);
00149 if (real->str == NULL)
00150 return FALSE;
00151
00152 real->allocated = _DBUS_STRING_ALLOCATION_PADDING + allocate_size;
00153 real->len = 0;
00154 real->str[real->len] = '\0';
00155
00156 real->max_length = _DBUS_STRING_MAX_MAX_LENGTH;
00157 real->constant = FALSE;
00158 real->locked = FALSE;
00159 real->invalid = FALSE;
00160 real->align_offset = 0;
00161
00162 fixup_alignment (real);
00163
00164 return TRUE;
00165 }
00166
00174 dbus_bool_t
00175 _dbus_string_init (DBusString *str)
00176 {
00177 return _dbus_string_init_preallocated (str, 0);
00178 }
00179
00180 #ifdef DBUS_BUILD_TESTS
00181
00182
00183
00184
00185
00186
00187 static void
00188 set_max_length (DBusString *str,
00189 int max_length)
00190 {
00191 DBusRealString *real;
00192
00193 real = (DBusRealString*) str;
00194
00195 real->max_length = max_length;
00196 }
00197 #endif
00198
00208 void
00209 _dbus_string_init_const (DBusString *str,
00210 const char *value)
00211 {
00212 _dbus_assert (value != NULL);
00213
00214 _dbus_string_init_const_len (str, value,
00215 strlen (value));
00216 }
00217
00228 void
00229 _dbus_string_init_const_len (DBusString *str,
00230 const char *value,
00231 int len)
00232 {
00233 DBusRealString *real;
00234
00235 _dbus_assert (str != NULL);
00236 _dbus_assert (len == 0 || value != NULL);
00237 _dbus_assert (len <= _DBUS_STRING_MAX_MAX_LENGTH);
00238 _dbus_assert (len >= 0);
00239
00240 real = (DBusRealString*) str;
00241
00242 real->str = (unsigned char*) value;
00243 real->len = len;
00244 real->allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
00245 real->max_length = real->len + 1;
00246 real->constant = TRUE;
00247 real->locked = TRUE;
00248 real->invalid = FALSE;
00249 real->align_offset = 0;
00250
00251
00252
00253
00254 }
00255
00261 void
00262 _dbus_string_free (DBusString *str)
00263 {
00264 DBusRealString *real = (DBusRealString*) str;
00265 DBUS_GENERIC_STRING_PREAMBLE (real);
00266
00267 if (real->constant)
00268 return;
00269 dbus_free (real->str - real->align_offset);
00270
00271 real->invalid = TRUE;
00272 }
00273
00274 #ifdef DBUS_BUILD_TESTS
00275
00276
00277
00287 void
00288 _dbus_string_lock (DBusString *str)
00289 {
00290 DBUS_LOCKED_STRING_PREAMBLE (str);
00291
00292 real->locked = TRUE;
00293
00294
00295
00296
00297 #define MAX_WASTE 48
00298 if (real->allocated - MAX_WASTE > real->len)
00299 {
00300 unsigned char *new_str;
00301 int new_allocated;
00302
00303 new_allocated = real->len + _DBUS_STRING_ALLOCATION_PADDING;
00304
00305 new_str = dbus_realloc (real->str - real->align_offset,
00306 new_allocated);
00307 if (new_str != NULL)
00308 {
00309 real->str = new_str + real->align_offset;
00310 real->allocated = new_allocated;
00311 fixup_alignment (real);
00312 }
00313 }
00314 }
00315 #endif
00316
00317 static dbus_bool_t
00318 reallocate_for_length (DBusRealString *real,
00319 int new_length)
00320 {
00321 int new_allocated;
00322 unsigned char *new_str;
00323
00324
00325
00326
00327 if (real->allocated > (_DBUS_STRING_MAX_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING) / 2)
00328 new_allocated = _DBUS_STRING_MAX_MAX_LENGTH + _DBUS_STRING_ALLOCATION_PADDING;
00329 else
00330 new_allocated = real->allocated * 2;
00331
00332
00333
00334
00335
00336
00337
00338
00339 #ifdef DBUS_DISABLE_ASSERT
00340 #else
00341 #ifdef DBUS_BUILD_TESTS
00342 new_allocated = 0;
00343
00344
00345 #endif
00346 #endif
00347
00348
00349 new_allocated = MAX (new_allocated,
00350 new_length + _DBUS_STRING_ALLOCATION_PADDING);
00351
00352 _dbus_assert (new_allocated >= real->allocated);
00353 new_str = dbus_realloc (real->str - real->align_offset, new_allocated);
00354 if (_DBUS_UNLIKELY (new_str == NULL))
00355 return FALSE;
00356
00357 real->str = new_str + real->align_offset;
00358 real->allocated = new_allocated;
00359 fixup_alignment (real);
00360
00361 return TRUE;
00362 }
00363
00364 static dbus_bool_t
00365 set_length (DBusRealString *real,
00366 int new_length)
00367 {
00368
00369
00370
00371 if (_DBUS_UNLIKELY (new_length > real->max_length))
00372 return FALSE;
00373 else if (new_length > (real->allocated - _DBUS_STRING_ALLOCATION_PADDING) &&
00374 _DBUS_UNLIKELY (!reallocate_for_length (real, new_length)))
00375 return FALSE;
00376 else
00377 {
00378 real->len = new_length;
00379 real->str[new_length] = '\0';
00380 return TRUE;
00381 }
00382 }
00383
00384 static dbus_bool_t
00385 open_gap (int len,
00386 DBusRealString *dest,
00387 int insert_at)
00388 {
00389 if (len == 0)
00390 return TRUE;
00391
00392 if (len > dest->max_length - dest->len)
00393 return FALSE;
00394
00395 if (!set_length (dest, dest->len + len))
00396 return FALSE;
00397
00398 memmove (dest->str + insert_at + len,
00399 dest->str + insert_at,
00400 dest->len - len - insert_at);
00401
00402 return TRUE;
00403 }
00404
00405 #ifndef _dbus_string_get_data
00406
00417 char*
00418 _dbus_string_get_data (DBusString *str)
00419 {
00420 DBUS_STRING_PREAMBLE (str);
00421
00422 return (char*) real->str;
00423 }
00424 #endif
00425
00426
00427 #ifndef _dbus_string_get_const_data
00428
00434 const char*
00435 _dbus_string_get_const_data (const DBusString *str)
00436 {
00437 DBUS_CONST_STRING_PREAMBLE (str);
00438
00439 return (const char*) real->str;
00440 }
00441 #endif
00442
00456 char*
00457 _dbus_string_get_data_len (DBusString *str,
00458 int start,
00459 int len)
00460 {
00461 DBUS_STRING_PREAMBLE (str);
00462 _dbus_assert (start >= 0);
00463 _dbus_assert (len >= 0);
00464 _dbus_assert (start <= real->len);
00465 _dbus_assert (len <= real->len - start);
00466
00467 return (char*) real->str + start;
00468 }
00469
00470
00471 #ifndef _dbus_string_get_const_data_len
00472
00480 const char*
00481 _dbus_string_get_const_data_len (const DBusString *str,
00482 int start,
00483 int len)
00484 {
00485 DBUS_CONST_STRING_PREAMBLE (str);
00486 _dbus_assert (start >= 0);
00487 _dbus_assert (len >= 0);
00488 _dbus_assert (start <= real->len);
00489 _dbus_assert (len <= real->len - start);
00490
00491 return (const char*) real->str + start;
00492 }
00493 #endif
00494
00495
00496 #ifndef _dbus_string_set_byte
00497
00504 void
00505 _dbus_string_set_byte (DBusString *str,
00506 int i,
00507 unsigned char byte)
00508 {
00509 DBUS_STRING_PREAMBLE (str);
00510 _dbus_assert (i < real->len);
00511 _dbus_assert (i >= 0);
00512
00513 real->str[i] = byte;
00514 }
00515 #endif
00516
00517
00518 #ifndef _dbus_string_get_byte
00519
00528 unsigned char
00529 _dbus_string_get_byte (const DBusString *str,
00530 int start)
00531 {
00532 DBUS_CONST_STRING_PREAMBLE (str);
00533 _dbus_assert (start <= real->len);
00534 _dbus_assert (start >= 0);
00535
00536 return real->str[start];
00537 }
00538 #endif
00539
00550 dbus_bool_t
00551 _dbus_string_insert_bytes (DBusString *str,
00552 int i,
00553 int n_bytes,
00554 unsigned char byte)
00555 {
00556 DBUS_STRING_PREAMBLE (str);
00557 _dbus_assert (i <= real->len);
00558 _dbus_assert (i >= 0);
00559 _dbus_assert (n_bytes >= 0);
00560
00561 if (n_bytes == 0)
00562 return TRUE;
00563
00564 if (!open_gap (n_bytes, real, i))
00565 return FALSE;
00566
00567 memset (real->str + i, byte, n_bytes);
00568
00569 return TRUE;
00570 }
00571
00580 dbus_bool_t
00581 _dbus_string_insert_byte (DBusString *str,
00582 int i,
00583 unsigned char byte)
00584 {
00585 DBUS_STRING_PREAMBLE (str);
00586 _dbus_assert (i <= real->len);
00587 _dbus_assert (i >= 0);
00588
00589 if (!open_gap (1, real, i))
00590 return FALSE;
00591
00592 real->str[i] = byte;
00593
00594 return TRUE;
00595 }
00596
00607 dbus_bool_t
00608 _dbus_string_steal_data (DBusString *str,
00609 char **data_return)
00610 {
00611 int old_max_length;
00612 DBUS_STRING_PREAMBLE (str);
00613 _dbus_assert (data_return != NULL);
00614
00615 undo_alignment (real);
00616
00617 *data_return = (char*) real->str;
00618
00619 old_max_length = real->max_length;
00620
00621
00622 if (!_dbus_string_init (str))
00623 {
00624
00625 real->str = (unsigned char*) *data_return;
00626 *data_return = NULL;
00627 fixup_alignment (real);
00628 return FALSE;
00629 }
00630
00631 real->max_length = old_max_length;
00632
00633 return TRUE;
00634 }
00635
00636 #ifdef DBUS_BUILD_TESTS
00637
00652 dbus_bool_t
00653 _dbus_string_steal_data_len (DBusString *str,
00654 char **data_return,
00655 int start,
00656 int len)
00657 {
00658 DBusString dest;
00659 DBUS_STRING_PREAMBLE (str);
00660 _dbus_assert (data_return != NULL);
00661 _dbus_assert (start >= 0);
00662 _dbus_assert (len >= 0);
00663 _dbus_assert (start <= real->len);
00664 _dbus_assert (len <= real->len - start);
00665
00666 if (!_dbus_string_init (&dest))
00667 return FALSE;
00668
00669 set_max_length (&dest, real->max_length);
00670
00671 if (!_dbus_string_move_len (str, start, len, &dest, 0))
00672 {
00673 _dbus_string_free (&dest);
00674 return FALSE;
00675 }
00676
00677 _dbus_warn ("Broken code in _dbus_string_steal_data_len(), see @todo, FIXME\n");
00678 if (!_dbus_string_steal_data (&dest, data_return))
00679 {
00680 _dbus_string_free (&dest);
00681 return FALSE;
00682 }
00683
00684 _dbus_string_free (&dest);
00685 return TRUE;
00686 }
00687 #endif
00688
00696 dbus_bool_t
00697 _dbus_string_copy_data (const DBusString *str,
00698 char **data_return)
00699 {
00700 DBUS_CONST_STRING_PREAMBLE (str);
00701 _dbus_assert (data_return != NULL);
00702
00703 *data_return = dbus_malloc (real->len + 1);
00704 if (*data_return == NULL)
00705 return FALSE;
00706
00707 memcpy (*data_return, real->str, real->len + 1);
00708
00709 return TRUE;
00710 }
00711
00720 void
00721 _dbus_string_copy_to_buffer (const DBusString *str,
00722 char *buffer,
00723 int avail_len)
00724 {
00725 int copy_len;
00726 DBUS_CONST_STRING_PREAMBLE (str);
00727
00728 _dbus_assert (avail_len >= 0);
00729
00730 copy_len = MIN (avail_len, real->len+1);
00731 memcpy (buffer, real->str, copy_len);
00732 if (avail_len > 0 && avail_len == copy_len)
00733 buffer[avail_len-1] = '\0';
00734 }
00735
00736 #ifdef DBUS_BUILD_TESTS
00737
00746 dbus_bool_t
00747 _dbus_string_copy_data_len (const DBusString *str,
00748 char **data_return,
00749 int start,
00750 int len)
00751 {
00752 DBusString dest;
00753
00754 DBUS_CONST_STRING_PREAMBLE (str);
00755 _dbus_assert (data_return != NULL);
00756 _dbus_assert (start >= 0);
00757 _dbus_assert (len >= 0);
00758 _dbus_assert (start <= real->len);
00759 _dbus_assert (len <= real->len - start);
00760
00761 if (!_dbus_string_init (&dest))
00762 return FALSE;
00763
00764 set_max_length (&dest, real->max_length);
00765
00766 if (!_dbus_string_copy_len (str, start, len, &dest, 0))
00767 {
00768 _dbus_string_free (&dest);
00769 return FALSE;
00770 }
00771
00772 if (!_dbus_string_steal_data (&dest, data_return))
00773 {
00774 _dbus_string_free (&dest);
00775 return FALSE;
00776 }
00777
00778 _dbus_string_free (&dest);
00779 return TRUE;
00780 }
00781 #endif
00782
00783
00784 #ifndef _dbus_string_get_length
00785
00790 int
00791 _dbus_string_get_length (const DBusString *str)
00792 {
00793 DBUS_CONST_STRING_PREAMBLE (str);
00794
00795 return real->len;
00796 }
00797 #endif
00798
00811 dbus_bool_t
00812 _dbus_string_lengthen (DBusString *str,
00813 int additional_length)
00814 {
00815 DBUS_STRING_PREAMBLE (str);
00816 _dbus_assert (additional_length >= 0);
00817
00818 if (_DBUS_UNLIKELY (additional_length > real->max_length - real->len))
00819 return FALSE;
00820
00821 return set_length (real,
00822 real->len + additional_length);
00823 }
00824
00831 void
00832 _dbus_string_shorten (DBusString *str,
00833 int length_to_remove)
00834 {
00835 DBUS_STRING_PREAMBLE (str);
00836 _dbus_assert (length_to_remove >= 0);
00837 _dbus_assert (length_to_remove <= real->len);
00838
00839 set_length (real,
00840 real->len - length_to_remove);
00841 }
00842
00853 dbus_bool_t
00854 _dbus_string_set_length (DBusString *str,
00855 int length)
00856 {
00857 DBUS_STRING_PREAMBLE (str);
00858 _dbus_assert (length >= 0);
00859
00860 return set_length (real, length);
00861 }
00862
00863 static dbus_bool_t
00864 align_insert_point_then_open_gap (DBusString *str,
00865 int *insert_at_p,
00866 int alignment,
00867 int gap_size)
00868 {
00869 unsigned long new_len;
00870 unsigned long gap_pos;
00871 int insert_at;
00872 int delta;
00873 DBUS_STRING_PREAMBLE (str);
00874 _dbus_assert (alignment >= 1);
00875 _dbus_assert (alignment <= 8);
00876
00877 insert_at = *insert_at_p;
00878
00879 _dbus_assert (insert_at <= real->len);
00880
00881 gap_pos = _DBUS_ALIGN_VALUE (insert_at, alignment);
00882 new_len = real->len + (gap_pos - insert_at) + gap_size;
00883
00884 if (_DBUS_UNLIKELY (new_len > (unsigned long) real->max_length))
00885 return FALSE;
00886
00887 delta = new_len - real->len;
00888 _dbus_assert (delta >= 0);
00889
00890 if (delta == 0)
00891 {
00892 _dbus_assert (((unsigned long) *insert_at_p) == gap_pos);
00893 return TRUE;
00894 }
00895
00896 if (_DBUS_UNLIKELY (!open_gap (new_len - real->len,
00897 real, insert_at)))
00898 return FALSE;
00899
00900
00901 if (gap_size < delta)
00902 {
00903 memset (&real->str[insert_at], '\0',
00904 gap_pos - insert_at);
00905 }
00906
00907 *insert_at_p = gap_pos;
00908
00909 return TRUE;
00910 }
00911
00912 static dbus_bool_t
00913 align_length_then_lengthen (DBusString *str,
00914 int alignment,
00915 int then_lengthen_by)
00916 {
00917 int insert_at;
00918
00919 insert_at = _dbus_string_get_length (str);
00920
00921 return align_insert_point_then_open_gap (str,
00922 &insert_at,
00923 alignment, then_lengthen_by);
00924 }
00925
00934 dbus_bool_t
00935 _dbus_string_align_length (DBusString *str,
00936 int alignment)
00937 {
00938 return align_length_then_lengthen (str, alignment, 0);
00939 }
00940
00950 dbus_bool_t
00951 _dbus_string_alloc_space (DBusString *str,
00952 int extra_bytes)
00953 {
00954 if (!_dbus_string_lengthen (str, extra_bytes))
00955 return FALSE;
00956 _dbus_string_shorten (str, extra_bytes);
00957
00958 return TRUE;
00959 }
00960
00961 static dbus_bool_t
00962 append (DBusRealString *real,
00963 const char *buffer,
00964 int buffer_len)
00965 {
00966 if (buffer_len == 0)
00967 return TRUE;
00968
00969 if (!_dbus_string_lengthen ((DBusString*)real, buffer_len))
00970 return FALSE;
00971
00972 memcpy (real->str + (real->len - buffer_len),
00973 buffer,
00974 buffer_len);
00975
00976 return TRUE;
00977 }
00978
00986 dbus_bool_t
00987 _dbus_string_append (DBusString *str,
00988 const char *buffer)
00989 {
00990 unsigned long buffer_len;
00991
00992 DBUS_STRING_PREAMBLE (str);
00993 _dbus_assert (buffer != NULL);
00994
00995 buffer_len = strlen (buffer);
00996 if (buffer_len > (unsigned long) real->max_length)
00997 return FALSE;
00998
00999 return append (real, buffer, buffer_len);
01000 }
01001
01003 #define ASSIGN_2_OCTETS(p, octets) \
01004 *((dbus_uint16_t*)(p)) = *((dbus_uint16_t*)(octets));
01005
01007 #define ASSIGN_4_OCTETS(p, octets) \
01008 *((dbus_uint32_t*)(p)) = *((dbus_uint32_t*)(octets));
01009
01010 #ifdef DBUS_HAVE_INT64
01011
01012 #define ASSIGN_8_OCTETS(p, octets) \
01013 *((dbus_uint64_t*)(p)) = *((dbus_uint64_t*)(octets));
01014 #else
01015
01016 #define ASSIGN_8_OCTETS(p, octets) \
01017 do { \
01018 unsigned char *b; \
01019 \
01020 b = p; \
01021 \
01022 *b++ = octets[0]; \
01023 *b++ = octets[1]; \
01024 *b++ = octets[2]; \
01025 *b++ = octets[3]; \
01026 *b++ = octets[4]; \
01027 *b++ = octets[5]; \
01028 *b++ = octets[6]; \
01029 *b++ = octets[7]; \
01030 _dbus_assert (b == p + 8); \
01031 } while (0)
01032 #endif
01033
01034 #ifdef DBUS_BUILD_TESTS
01035
01043 dbus_bool_t
01044 _dbus_string_append_4_aligned (DBusString *str,
01045 const unsigned char octets[4])
01046 {
01047 DBUS_STRING_PREAMBLE (str);
01048
01049 if (!align_length_then_lengthen (str, 4, 4))
01050 return FALSE;
01051
01052 ASSIGN_4_OCTETS (real->str + (real->len - 4), octets);
01053
01054 return TRUE;
01055 }
01056 #endif
01057
01058 #ifdef DBUS_BUILD_TESTS
01059
01067 dbus_bool_t
01068 _dbus_string_append_8_aligned (DBusString *str,
01069 const unsigned char octets[8])
01070 {
01071 DBUS_STRING_PREAMBLE (str);
01072
01073 if (!align_length_then_lengthen (str, 8, 8))
01074 return FALSE;
01075
01076 ASSIGN_8_OCTETS (real->str + (real->len - 8), octets);
01077
01078 return TRUE;
01079 }
01080 #endif
01081
01091 dbus_bool_t
01092 _dbus_string_insert_2_aligned (DBusString *str,
01093 int insert_at,
01094 const unsigned char octets[4])
01095 {
01096 DBUS_STRING_PREAMBLE (str);
01097
01098 if (!align_insert_point_then_open_gap (str, &insert_at, 2, 2))
01099 return FALSE;
01100
01101 ASSIGN_2_OCTETS (real->str + insert_at, octets);
01102
01103 return TRUE;
01104 }
01105
01115 dbus_bool_t
01116 _dbus_string_insert_4_aligned (DBusString *str,
01117 int insert_at,
01118 const unsigned char octets[4])
01119 {
01120 DBUS_STRING_PREAMBLE (str);
01121
01122 if (!align_insert_point_then_open_gap (str, &insert_at, 4, 4))
01123 return FALSE;
01124
01125 ASSIGN_4_OCTETS (real->str + insert_at, octets);
01126
01127 return TRUE;
01128 }
01129
01139 dbus_bool_t
01140 _dbus_string_insert_8_aligned (DBusString *str,
01141 int insert_at,
01142 const unsigned char octets[8])
01143 {
01144 DBUS_STRING_PREAMBLE (str);
01145
01146 if (!align_insert_point_then_open_gap (str, &insert_at, 8, 8))
01147 return FALSE;
01148
01149 _dbus_assert (_DBUS_ALIGN_VALUE (insert_at, 8) == (unsigned) insert_at);
01150
01151 ASSIGN_8_OCTETS (real->str + insert_at, octets);
01152
01153 return TRUE;
01154 }
01155
01156
01167 dbus_bool_t
01168 _dbus_string_insert_alignment (DBusString *str,
01169 int *insert_at,
01170 int alignment)
01171 {
01172 DBUS_STRING_PREAMBLE (str);
01173
01174 if (!align_insert_point_then_open_gap (str, insert_at, alignment, 0))
01175 return FALSE;
01176
01177 _dbus_assert (_DBUS_ALIGN_VALUE (*insert_at, alignment) == (unsigned) *insert_at);
01178
01179 return TRUE;
01180 }
01181
01191 dbus_bool_t
01192 _dbus_string_append_printf_valist (DBusString *str,
01193 const char *format,
01194 va_list args)
01195 {
01196 int len;
01197 va_list args_copy;
01198
01199 DBUS_STRING_PREAMBLE (str);
01200
01201 DBUS_VA_COPY (args_copy, args);
01202
01203
01204 len = _dbus_printf_string_upper_bound (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
01805 dbus_bool_t
01806 _dbus_string_find_eol (const DBusString *str,
01807 int start,
01808 int *found,
01809 int *found_len)
01810 {
01811 int i;
01812
01813 DBUS_CONST_STRING_PREAMBLE (str);
01814 _dbus_assert (start <= real->len);
01815 _dbus_assert (start >= 0);
01816
01817 i = start;
01818 while (i < real->len)
01819 {
01820 if (real->str[i] == '\r')
01821 {
01822 if ((i+1) < real->len && real->str[i+1] == '\n')
01823 {
01824 if (found)
01825 *found = i;
01826 if (found_len)
01827 *found_len = 2;
01828 return TRUE;
01829 }
01830 else
01831 {
01832 if (found)
01833 *found = i;
01834 if (found_len)
01835 *found_len = 1;
01836 return TRUE;
01837 }
01838 }
01839 else if (real->str[i] == '\n')
01840 {
01841 if (found)
01842 *found = i;
01843 if (found_len)
01844 *found_len = 1;
01845 return TRUE;
01846 }
01847 ++i;
01848 }
01849
01850 if (found)
01851 *found = real->len;
01852
01853 if (found_len)
01854 *found_len = 0;
01855
01856 return FALSE;
01857 }
01858
01875 dbus_bool_t
01876 _dbus_string_find_to (const DBusString *str,
01877 int start,
01878 int end,
01879 const char *substr,
01880 int *found)
01881 {
01882 int i;
01883 DBUS_CONST_STRING_PREAMBLE (str);
01884 _dbus_assert (substr != NULL);
01885 _dbus_assert (start <= real->len);
01886 _dbus_assert (start >= 0);
01887 _dbus_assert (substr != NULL);
01888 _dbus_assert (end <= real->len);
01889 _dbus_assert (start <= end);
01890
01891
01892 if (*substr == '\0')
01893 {
01894 if (found)
01895 *found = start;
01896 return TRUE;
01897 }
01898
01899 i = start;
01900 while (i < end)
01901 {
01902 if (real->str[i] == substr[0])
01903 {
01904 int j = i + 1;
01905
01906 while (j < end)
01907 {
01908 if (substr[j - i] == '\0')
01909 break;
01910 else if (real->str[j] != substr[j - i])
01911 break;
01912
01913 ++j;
01914 }
01915
01916 if (substr[j - i] == '\0')
01917 {
01918 if (found)
01919 *found = i;
01920 return TRUE;
01921 }
01922 }
01923
01924 ++i;
01925 }
01926
01927 if (found)
01928 *found = end;
01929
01930 return FALSE;
01931 }
01932
01943 dbus_bool_t
01944 _dbus_string_find_blank (const DBusString *str,
01945 int start,
01946 int *found)
01947 {
01948 int i;
01949 DBUS_CONST_STRING_PREAMBLE (str);
01950 _dbus_assert (start <= real->len);
01951 _dbus_assert (start >= 0);
01952
01953 i = start;
01954 while (i < real->len)
01955 {
01956 if (real->str[i] == ' ' ||
01957 real->str[i] == '\t')
01958 {
01959 if (found)
01960 *found = i;
01961 return TRUE;
01962 }
01963
01964 ++i;
01965 }
01966
01967 if (found)
01968 *found = real->len;
01969
01970 return FALSE;
01971 }
01972
01981 void
01982 _dbus_string_skip_blank (const DBusString *str,
01983 int start,
01984 int *end)
01985 {
01986 int i;
01987 DBUS_CONST_STRING_PREAMBLE (str);
01988 _dbus_assert (start <= real->len);
01989 _dbus_assert (start >= 0);
01990
01991 i = start;
01992 while (i < real->len)
01993 {
01994 if (!DBUS_IS_ASCII_BLANK (real->str[i]))
01995 break;
01996
01997 ++i;
01998 }
01999
02000 _dbus_assert (i == real->len || !DBUS_IS_ASCII_WHITE (real->str[i]));
02001
02002 if (end)
02003 *end = i;
02004 }
02005
02006
02015 void
02016 _dbus_string_skip_white (const DBusString *str,
02017 int start,
02018 int *end)
02019 {
02020 int i;
02021 DBUS_CONST_STRING_PREAMBLE (str);
02022 _dbus_assert (start <= real->len);
02023 _dbus_assert (start >= 0);
02024
02025 i = start;
02026 while (i < real->len)
02027 {
02028 if (!DBUS_IS_ASCII_WHITE (real->str[i]))
02029 break;
02030
02031 ++i;
02032 }
02033
02034 _dbus_assert (i == real->len || !(DBUS_IS_ASCII_WHITE (real->str[i])));
02035
02036 if (end)
02037 *end = i;
02038 }
02039
02048 void
02049 _dbus_string_skip_white_reverse (const DBusString *str,
02050 int end,
02051 int *start)
02052 {
02053 int i;
02054 DBUS_CONST_STRING_PREAMBLE (str);
02055 _dbus_assert (end <= real->len);
02056 _dbus_assert (end >= 0);
02057
02058 i = end;
02059 while (i > 0)
02060 {
02061 if (!DBUS_IS_ASCII_WHITE (real->str[i-1]))
02062 break;
02063 --i;
02064 }
02065
02066 _dbus_assert (i >= 0 && (i == 0 || !(DBUS_IS_ASCII_WHITE (real->str[i-1]))));
02067
02068 if (start)
02069 *start = i;
02070 }
02071
02087 dbus_bool_t
02088 _dbus_string_pop_line (DBusString *source,
02089 DBusString *dest)
02090 {
02091 int eol, eol_len;
02092
02093 _dbus_string_set_length (dest, 0);
02094
02095 eol = 0;
02096 eol_len = 0;
02097 if (!_dbus_string_find_eol (source, 0, &eol, &eol_len))
02098 {
02099 _dbus_assert (eol == _dbus_string_get_length (source));
02100 if (eol == 0)
02101 {
02102
02103 return FALSE;
02104 }
02105
02106 }
02107
02108
02109
02110
02111
02112 if (!_dbus_string_move_len (source, 0, eol + eol_len, dest, 0))
02113 return FALSE;
02114
02115
02116 if (!_dbus_string_set_length (dest, eol))
02117 {
02118 _dbus_assert_not_reached ("out of memory when shortening a string");
02119 return FALSE;
02120 }
02121
02122 return TRUE;
02123 }
02124
02125 #ifdef DBUS_BUILD_TESTS
02126
02132 void
02133 _dbus_string_delete_first_word (DBusString *str)
02134 {
02135 int i;
02136
02137 if (_dbus_string_find_blank (str, 0, &i))
02138 _dbus_string_skip_blank (str, i, &i);
02139
02140 _dbus_string_delete (str, 0, i);
02141 }
02142 #endif
02143
02144 #ifdef DBUS_BUILD_TESTS
02145
02150 void
02151 _dbus_string_delete_leading_blanks (DBusString *str)
02152 {
02153 int i;
02154
02155 _dbus_string_skip_blank (str, 0, &i);
02156
02157 if (i > 0)
02158 _dbus_string_delete (str, 0, i);
02159 }
02160 #endif
02161
02167 void
02168 _dbus_string_chop_white(DBusString *str)
02169 {
02170 int i;
02171
02172 _dbus_string_skip_white (str, 0, &i);
02173
02174 if (i > 0)
02175 _dbus_string_delete (str, 0, i);
02176
02177 _dbus_string_skip_white_reverse (str, _dbus_string_get_length (str), &i);
02178
02179 _dbus_string_set_length (str, i);
02180 }
02181
02191 dbus_bool_t
02192 _dbus_string_equal (const DBusString *a,
02193 const DBusString *b)
02194 {
02195 const unsigned char *ap;
02196 const unsigned char *bp;
02197 const unsigned char *a_end;
02198 const DBusRealString *real_a = (const DBusRealString*) a;
02199 const DBusRealString *real_b = (const DBusRealString*) b;
02200 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02201 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02202
02203 if (real_a->len != real_b->len)
02204 return FALSE;
02205
02206 ap = real_a->str;
02207 bp = real_b->str;
02208 a_end = real_a->str + real_a->len;
02209 while (ap != a_end)
02210 {
02211 if (*ap != *bp)
02212 return FALSE;
02213
02214 ++ap;
02215 ++bp;
02216 }
02217
02218 return TRUE;
02219 }
02220
02221 #ifdef DBUS_BUILD_TESTS
02222
02235 dbus_bool_t
02236 _dbus_string_equal_len (const DBusString *a,
02237 const DBusString *b,
02238 int len)
02239 {
02240 const unsigned char *ap;
02241 const unsigned char *bp;
02242 const unsigned char *a_end;
02243 const DBusRealString *real_a = (const DBusRealString*) a;
02244 const DBusRealString *real_b = (const DBusRealString*) b;
02245 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02246 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02247
02248 if (real_a->len != real_b->len &&
02249 (real_a->len < len || real_b->len < len))
02250 return FALSE;
02251
02252 ap = real_a->str;
02253 bp = real_b->str;
02254 a_end = real_a->str + MIN (real_a->len, len);
02255 while (ap != a_end)
02256 {
02257 if (*ap != *bp)
02258 return FALSE;
02259
02260 ++ap;
02261 ++bp;
02262 }
02263
02264 return TRUE;
02265 }
02266 #endif
02267
02284 dbus_bool_t
02285 _dbus_string_equal_substring (const DBusString *a,
02286 int a_start,
02287 int a_len,
02288 const DBusString *b,
02289 int b_start)
02290 {
02291 const unsigned char *ap;
02292 const unsigned char *bp;
02293 const unsigned char *a_end;
02294 const DBusRealString *real_a = (const DBusRealString*) a;
02295 const DBusRealString *real_b = (const DBusRealString*) b;
02296 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02297 DBUS_GENERIC_STRING_PREAMBLE (real_b);
02298 _dbus_assert (a_start >= 0);
02299 _dbus_assert (a_len >= 0);
02300 _dbus_assert (a_start <= real_a->len);
02301 _dbus_assert (a_len <= real_a->len - a_start);
02302 _dbus_assert (b_start >= 0);
02303 _dbus_assert (b_start <= real_b->len);
02304
02305 if (a_len > real_b->len - b_start)
02306 return FALSE;
02307
02308 ap = real_a->str + a_start;
02309 bp = real_b->str + b_start;
02310 a_end = ap + a_len;
02311 while (ap != a_end)
02312 {
02313 if (*ap != *bp)
02314 return FALSE;
02315
02316 ++ap;
02317 ++bp;
02318 }
02319
02320 _dbus_assert (bp <= (real_b->str + real_b->len));
02321
02322 return TRUE;
02323 }
02324
02332 dbus_bool_t
02333 _dbus_string_equal_c_str (const DBusString *a,
02334 const char *c_str)
02335 {
02336 const unsigned char *ap;
02337 const unsigned char *bp;
02338 const unsigned char *a_end;
02339 const DBusRealString *real_a = (const DBusRealString*) a;
02340 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02341 _dbus_assert (c_str != NULL);
02342
02343 ap = real_a->str;
02344 bp = (const unsigned char*) c_str;
02345 a_end = real_a->str + real_a->len;
02346 while (ap != a_end && *bp)
02347 {
02348 if (*ap != *bp)
02349 return FALSE;
02350
02351 ++ap;
02352 ++bp;
02353 }
02354
02355 if (ap != a_end || *bp)
02356 return FALSE;
02357
02358 return TRUE;
02359 }
02360
02361 #ifdef DBUS_BUILD_TESTS
02362
02369 dbus_bool_t
02370 _dbus_string_starts_with_c_str (const DBusString *a,
02371 const char *c_str)
02372 {
02373 const unsigned char *ap;
02374 const unsigned char *bp;
02375 const unsigned char *a_end;
02376 const DBusRealString *real_a = (const DBusRealString*) a;
02377 DBUS_GENERIC_STRING_PREAMBLE (real_a);
02378 _dbus_assert (c_str != NULL);
02379
02380 ap = real_a->str;
02381 bp = (const unsigned char*) c_str;
02382 a_end = real_a->str + real_a->len;
02383 while (ap != a_end && *bp)
02384 {
02385 if (*ap != *bp)
02386 return FALSE;
02387
02388 ++ap;
02389 ++bp;
02390 }
02391
02392 if (*bp == '\0')
02393 return TRUE;
02394 else
02395 return FALSE;
02396 }
02397 #endif
02398
02407 dbus_bool_t
02408 _dbus_string_append_byte_as_hex (DBusString *str,
02409 int byte)
02410 {
02411 const char hexdigits[16] = {
02412 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
02413 'a', 'b', 'c', 'd', 'e', 'f'
02414 };
02415
02416 if (!_dbus_string_append_byte (str,
02417 hexdigits[(byte >> 4)]))
02418 return FALSE;
02419
02420 if (!_dbus_string_append_byte (str,
02421 hexdigits[(byte & 0x0f)]))
02422 {
02423 _dbus_string_set_length (str,
02424 _dbus_string_get_length (str) - 1);
02425 return FALSE;
02426 }
02427
02428 return TRUE;
02429 }
02430
02441 dbus_bool_t
02442 _dbus_string_hex_encode (const DBusString *source,
02443 int start,
02444 DBusString *dest,
02445 int insert_at)
02446 {
02447 DBusString result;
02448 const unsigned char *p;
02449 const unsigned char *end;
02450 dbus_bool_t retval;
02451
02452 _dbus_assert (start <= _dbus_string_get_length (source));
02453
02454 if (!_dbus_string_init (&result))
02455 return FALSE;
02456
02457 retval = FALSE;
02458
02459 p = (const unsigned char*) _dbus_string_get_const_data (source);
02460 end = p + _dbus_string_get_length (source);
02461 p += start;
02462
02463 while (p != end)
02464 {
02465 if (!_dbus_string_append_byte_as_hex (&result, *p))
02466 goto out;
02467
02468 ++p;
02469 }
02470
02471 if (!_dbus_string_move (&result, 0, dest, insert_at))
02472 goto out;
02473
02474 retval = TRUE;
02475
02476 out:
02477 _dbus_string_free (&result);
02478 return retval;
02479 }
02480
02491 dbus_bool_t
02492 _dbus_string_hex_decode (const DBusString *source,
02493 int start,
02494 int *end_return,
02495 DBusString *dest,
02496 int insert_at)
02497 {
02498 DBusString result;
02499 const unsigned char *p;
02500 const unsigned char *end;
02501 dbus_bool_t retval;
02502 dbus_bool_t high_bits;
02503
02504 _dbus_assert (start <= _dbus_string_get_length (source));
02505
02506 if (!_dbus_string_init (&result))
02507 return FALSE;
02508
02509 retval = FALSE;
02510
02511 high_bits = TRUE;
02512 p = (const unsigned char*) _dbus_string_get_const_data (source);
02513 end = p + _dbus_string_get_length (source);
02514 p += start;
02515
02516 while (p != end)
02517 {
02518 unsigned int val;
02519
02520 switch (*p)
02521 {
02522 case '0':
02523 val = 0;
02524 break;
02525 case '1':
02526 val = 1;
02527 break;
02528 case '2':
02529 val = 2;
02530 break;
02531 case '3':
02532 val = 3;
02533 break;
02534 case '4':
02535 val = 4;
02536 break;
02537 case '5':
02538 val = 5;
02539 break;
02540 case '6':
02541 val = 6;
02542 break;
02543 case '7':
02544 val = 7;
02545 break;
02546 case '8':
02547 val = 8;
02548 break;
02549 case '9':
02550 val = 9;
02551 break;
02552 case 'a':
02553 case 'A':
02554 val = 10;
02555 break;
02556 case 'b':
02557 case 'B':
02558 val = 11;
02559 break;
02560 case 'c':
02561 case 'C':
02562 val = 12;
02563 break;
02564 case 'd':
02565 case 'D':
02566 val = 13;
02567 break;
02568 case 'e':
02569 case 'E':
02570 val = 14;
02571 break;
02572 case 'f':
02573 case 'F':
02574 val = 15;
02575 break;
02576 default:
02577 goto done;
02578 }
02579
02580 if (high_bits)
02581 {
02582 if (!_dbus_string_append_byte (&result,
02583 val << 4))
02584 goto out;
02585 }
02586 else
02587 {
02588 int len;
02589 unsigned char b;
02590
02591 len = _dbus_string_get_length (&result);
02592
02593 b = _dbus_string_get_byte (&result, len - 1);
02594
02595 b |= val;
02596
02597 _dbus_string_set_byte (&result, len - 1, b);
02598 }
02599
02600 high_bits = !high_bits;
02601
02602 ++p;
02603 }
02604
02605 done:
02606 if (!_dbus_string_move (&result, 0, dest, insert_at))
02607 goto out;
02608
02609 if (end_return)
02610 *end_return = p - (const unsigned char*) _dbus_string_get_const_data (source);
02611
02612 retval = TRUE;
02613
02614 out:
02615 _dbus_string_free (&result);
02616 return retval;
02617 }
02618
02632 dbus_bool_t
02633 _dbus_string_validate_ascii (const DBusString *str,
02634 int start,
02635 int len)
02636 {
02637 const unsigned char *s;
02638 const unsigned char *end;
02639 DBUS_CONST_STRING_PREAMBLE (str);
02640 _dbus_assert (start >= 0);
02641 _dbus_assert (start <= real->len);
02642 _dbus_assert (len >= 0);
02643
02644 if (len > real->len - start)
02645 return FALSE;
02646
02647 s = real->str + start;
02648 end = s + len;
02649 while (s != end)
02650 {
02651 if (_DBUS_UNLIKELY (!_DBUS_ISASCII (*s)))
02652 return FALSE;
02653
02654 ++s;
02655 }
02656
02657 return TRUE;
02658 }
02659
02675 dbus_bool_t
02676 _dbus_string_validate_utf8 (const DBusString *str,
02677 int start,
02678 int len)
02679 {
02680 const unsigned char *p;
02681 const unsigned char *end;
02682 DBUS_CONST_STRING_PREAMBLE (str);
02683 _dbus_assert (start >= 0);
02684 _dbus_assert (start <= real->len);
02685 _dbus_assert (len >= 0);
02686
02687
02688
02689
02690
02691
02692
02693
02694
02695 if (_DBUS_UNLIKELY (len > real->len - start))
02696 return FALSE;
02697
02698 p = real->str + start;
02699 end = p + len;
02700
02701 while (p < end)
02702 {
02703 int i, mask, char_len;
02704 dbus_unichar_t result;
02705
02706
02707 if (*p == '\0')
02708 break;
02709
02710
02711
02712
02713
02714
02715
02716 if (*p < 128)
02717 {
02718 ++p;
02719 continue;
02720 }
02721
02722 UTF8_COMPUTE (*p, mask, char_len);
02723
02724 if (_DBUS_UNLIKELY (char_len == 0))
02725 break;
02726
02727
02728 if (_DBUS_UNLIKELY ((end - p) < char_len))
02729 break;
02730
02731 UTF8_GET (result, p, i, mask, char_len);
02732
02733
02734 if (_DBUS_UNLIKELY (UTF8_LENGTH (result) != char_len))
02735 break;
02736 #if 0
02737
02738 if (_DBUS_UNLIKELY (result == (dbus_unichar_t)-1))
02739 break;
02740 #endif
02741
02742 if (_DBUS_UNLIKELY (!UNICODE_VALID (result)))
02743 break;
02744
02745
02746 _dbus_assert (result != (dbus_unichar_t)-1);
02747
02748 p += char_len;
02749 }
02750
02751
02752
02753
02754 if (_DBUS_UNLIKELY (p != end))
02755 return FALSE;
02756 else
02757 return TRUE;
02758 }
02759
02773 dbus_bool_t
02774 _dbus_string_validate_nul (const DBusString *str,
02775 int start,
02776 int len)
02777 {
02778 const unsigned char *s;
02779 const unsigned char *end;
02780 DBUS_CONST_STRING_PREAMBLE (str);
02781 _dbus_assert (start >= 0);
02782 _dbus_assert (len >= 0);
02783 _dbus_assert (start <= real->len);
02784
02785 if (len > real->len - start)
02786 return FALSE;
02787
02788 s = real->str + start;
02789 end = s + len;
02790 while (s != end)
02791 {
02792 if (_DBUS_UNLIKELY (*s != '\0'))
02793 return FALSE;
02794 ++s;
02795 }
02796
02797 return TRUE;
02798 }
02799
02805 void
02806 _dbus_string_zero (DBusString *str)
02807 {
02808 DBUS_STRING_PREAMBLE (str);
02809
02810 memset (real->str - real->align_offset, '\0', real->allocated);
02811 }
02814