dbus/dbus-string.h

   1 /* -*- mode: C; c-file-style: "gnu" -*- */
   2 /* dbus-string.h String utility class (internal to D-Bus implementation)
   3  *
   4  * Copyright (C) 2002, 2003 Red Hat, Inc.
   5  *
   6  * Licensed under the Academic Free License version 2.1
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  *
  22  */
  23
  24 #ifndef DBUS_STRING_H
  25 #define DBUS_STRING_H
  26
  27 #include <config.h>
  28
  29 #include <dbus/dbus-memory.h>
  30 #include <dbus/dbus-types.h>
  31 #include <dbus/dbus-sysdeps.h>
  32
  33 #include <stdarg.h>
  34
  35 DBUS_BEGIN_DECLS
  36
  37 /**
  38  * DBusString object
  39  */
  40 struct DBusString
  41 {
  42   const void *dummy1; /**< placeholder */
  43   int   dummy2;       /**< placeholder */
  44   int   dummy3;       /**< placeholder */
  45   int   dummy4;       /**< placeholder */
  46   unsigned int dummy5 : 1; /**< placeholder */
  47   unsigned int dummy6 : 1; /**< placeholder */
  48   unsigned int dummy7 : 1; /**< placeholder */
  49   unsigned int dummy8 : 3; /**< placeholder */
  50 };
  51
  52 #ifdef DBUS_DISABLE_ASSERT
  53 /* Some simple inlining hacks; the current linker is not smart enough
  54  * to inline non-exported symbols across files in the library.
  55  * Note that these break type safety (due to the casts)
  56  */
  57 #define _dbus_string_get_data(s) ((char*)(((DBusString*)(s))->dummy1))
  58 #define _dbus_string_get_length(s) (((DBusString*)(s))->dummy2)
  59 #define _dbus_string_set_byte(s, i, b) ((((unsigned char*)(((DBusString*)(s))->dummy1))[(i)]) = (unsigned char) (b))
  60 #define _dbus_string_get_byte(s, i) (((const unsigned char*)(((DBusString*)(s))->dummy1))[(i)])
  61 #define _dbus_string_get_const_data(s) ((const char*)(((DBusString*)(s))->dummy1))
  62 #define _dbus_string_get_const_data_len(s,start,len) (((const char*)(((DBusString*)(s))->dummy1)) + (start))
  63 #endif
  64
  65 dbus_bool_t   _dbus_string_init                  (DBusString        *str);
  66 void          _dbus_string_init_const            (DBusString        *str,
  67                                                   const char        *value);
  68 void          _dbus_string_init_const_len        (DBusString        *str,
  69                                                   const char        *value,
  70                                                   int                len);
  71 dbus_bool_t   _dbus_string_init_preallocated     (DBusString        *str,
  72                                                   int                allocate_size);
  73 void          _dbus_string_free                  (DBusString        *str);
  74 void          _dbus_string_lock                  (DBusString        *str);
  75 #ifndef _dbus_string_get_data
  76 char*         _dbus_string_get_data              (DBusString        *str);
  77 #endif /* _dbus_string_get_data */
  78 #ifndef _dbus_string_get_const_data
  79 const char*   _dbus_string_get_const_data        (const DBusString  *str);
  80 #endif /* _dbus_string_get_const_data */
  81 char*         _dbus_string_get_data_len          (DBusString        *str,
  82                                                   int                start,
  83                                                   int                len);
  84 #ifndef _dbus_string_get_const_data_len
  85 const char*   _dbus_string_get_const_data_len    (const DBusString  *str,
  86                                                   int                start,
  87                                                   int                len);
  88 #endif
  89 #ifndef _dbus_string_set_byte
  90 void          _dbus_string_set_byte              (DBusString        *str,
  91                                                   int                i,
  92                                                   unsigned char      byte);
  93 #endif
  94 #ifndef _dbus_string_get_byte
  95 unsigned char _dbus_string_get_byte              (const DBusString  *str,
  96                                                   int                start);
  97 #endif /* _dbus_string_get_byte */
  98 dbus_bool_t   _dbus_string_insert_bytes          (DBusString        *str,
  99                                                   int                i,
 100                                                   int                n_bytes,
 101                                                   unsigned char      byte);
 102 dbus_bool_t   _dbus_string_insert_byte           (DBusString        *str,
 103                                                   int                i,
 104                                                   unsigned char      byte);
 105 dbus_bool_t   _dbus_string_steal_data            (DBusString        *str,
 106                                                   char             **data_return);
 107 dbus_bool_t   _dbus_string_steal_data_len        (DBusString        *str,
 108                                                   char             **data_return,
 109                                                   int                start,
 110                                                   int                len);
 111 dbus_bool_t   _dbus_string_copy_data             (const DBusString  *str,
 112                                                   char             **data_return);
 113 dbus_bool_t   _dbus_string_copy_data_len         (const DBusString  *str,
 114                                                   char             **data_return,
 115                                                   int                start,
 116                                                   int                len);
 117 void          _dbus_string_copy_to_buffer        (const DBusString  *str,
 118                                                   char              *buffer,
 119                                                   int                len);
 120 #ifndef _dbus_string_get_length
 121 int           _dbus_string_get_length            (const DBusString  *str);
 122 #endif /* !_dbus_string_get_length */
 123
 124 dbus_bool_t   _dbus_string_lengthen              (DBusString        *str,
 125                                                   int                additional_length);
 126 void          _dbus_string_shorten               (DBusString        *str,
 127                                                   int                length_to_remove);
 128 dbus_bool_t   _dbus_string_set_length            (DBusString        *str,
 129                                                   int                length);
 130 dbus_bool_t   _dbus_string_align_length          (DBusString        *str,
 131                                                   int                alignment);
 132 dbus_bool_t   _dbus_string_alloc_space           (DBusString        *str,
 133                                                   int                extra_bytes);
 134 dbus_bool_t   _dbus_string_append                (DBusString        *str,
 135                                                   const char        *buffer);
 136 dbus_bool_t   _dbus_string_append_len            (DBusString        *str,
 137                                                   const char        *buffer,
 138                                                   int                len);
 139 dbus_bool_t   _dbus_string_append_int            (DBusString        *str,
 140                                                   long               value);
 141 dbus_bool_t   _dbus_string_append_uint           (DBusString        *str,
 142                                                   unsigned long      value);
 143 dbus_bool_t   _dbus_string_append_double         (DBusString        *str,
 144                                                   double             value);
 145 dbus_bool_t   _dbus_string_append_byte           (DBusString        *str,
 146                                                   unsigned char      byte);
 147 dbus_bool_t   _dbus_string_append_unichar        (DBusString        *str,
 148                                                   dbus_unichar_t     ch);
 149 dbus_bool_t   _dbus_string_append_4_aligned      (DBusString        *str,
 150                                                   const unsigned char octets[4]);
 151 dbus_bool_t   _dbus_string_append_8_aligned      (DBusString        *str,
 152                                                   const unsigned char octets[8]);
 153 dbus_bool_t   _dbus_string_append_printf         (DBusString        *str,
 154                                                   const char        *format,
 155                                                   ...) _DBUS_GNUC_PRINTF (2, 3);
 156 dbus_bool_t   _dbus_string_append_printf_valist  (DBusString        *str,
 157                                                   const char        *format,
 158                                                   va_list            args);
 159 dbus_bool_t   _dbus_string_insert_2_aligned      (DBusString        *str,
 160                                                   int                insert_at,
 161                                                   const unsigned char octets[2]);
 162 dbus_bool_t   _dbus_string_insert_4_aligned      (DBusString        *str,
 163                                                   int                insert_at,
 164                                                   const unsigned char octets[4]);
 165 dbus_bool_t   _dbus_string_insert_8_aligned      (DBusString        *str,
 166                                                   int                insert_at,
 167                                                   const unsigned char octets[8]);
 168 dbus_bool_t   _dbus_string_insert_alignment      (DBusString        *str,
 169                                                   int               *insert_at,
 170                                                   int                alignment);
 171 void          _dbus_string_delete                (DBusString        *str,
 172                                                   int                start,
 173                                                   int                len);
 174 dbus_bool_t   _dbus_string_move                  (DBusString        *source,
 175                                                   int                start,
 176                                                   DBusString        *dest,
 177                                                   int                insert_at);
 178 dbus_bool_t   _dbus_string_copy                  (const DBusString  *source,
 179                                                   int                start,
 180                                                   DBusString        *dest,
 181                                                   int                insert_at);
 182 dbus_bool_t   _dbus_string_move_len              (DBusString        *source,
 183                                                   int                start,
 184                                                   int                len,
 185                                                   DBusString        *dest,
 186                                                   int                insert_at);
 187 dbus_bool_t   _dbus_string_copy_len              (const DBusString  *source,
 188                                                   int                start,
 189                                                   int                len,
 190                                                   DBusString        *dest,
 191                                                   int                insert_at);
 192 dbus_bool_t   _dbus_string_replace_len           (const DBusString  *source,
 193                                                   int                start,
 194                                                   int                len,
 195                                                   DBusString        *dest,
 196                                                   int                replace_at,
 197                                                   int                replace_len);
 198 void          _dbus_string_get_unichar           (const DBusString  *str,
 199                                                   int                start,
 200                                                   dbus_unichar_t    *ch_return,
 201                                                   int               *end_return);
 202 dbus_bool_t   _dbus_string_parse_int             (const DBusString  *str,
 203                                                   int                start,
 204                                                   long              *value_return,
 205                                                   int               *end_return);
 206 dbus_bool_t   _dbus_string_parse_uint            (const DBusString  *str,
 207                                                   int                start,
 208                                                   unsigned long     *value_return,
 209                                                   int               *end_return);
 210 dbus_bool_t   _dbus_string_parse_double          (const DBusString  *str,
 211                                                   int                start,
 212                                                   double            *value,
 213                                                   int               *end_return);
 214 dbus_bool_t   _dbus_string_find                  (const DBusString  *str,
 215                                                   int                start,
 216                                                   const char        *substr,
 217                                                   int               *found);
 218 dbus_bool_t   _dbus_string_find_to               (const DBusString  *str,
 219                                                   int                start,
 220                                                   int                end,
 221                                                   const char        *substr,
 222                                                   int               *found);
 223 dbus_bool_t   _dbus_string_find_byte_backward    (const DBusString  *str,
 224                                                   int                start,
 225                                                   unsigned char      byte,
 226                                                   int               *found);
 227 dbus_bool_t   _dbus_string_find_blank            (const DBusString  *str,
 228                                                   int                start,
 229                                                   int               *found);
 230 void          _dbus_string_skip_blank            (const DBusString  *str,
 231                                                   int                start,
 232                                                   int               *end);
 233 void          _dbus_string_skip_white            (const DBusString  *str,
 234                                                   int                start,
 235                                                   int               *end);
 236 dbus_bool_t   _dbus_string_equal                 (const DBusString  *a,
 237                                                   const DBusString  *b);
 238 dbus_bool_t   _dbus_string_equal_c_str           (const DBusString  *a,
 239                                                   const char        *c_str);
 240 dbus_bool_t   _dbus_string_equal_len             (const DBusString  *a,
 241                                                   const DBusString  *b,
 242                                                   int                len);
 243 dbus_bool_t   _dbus_string_equal_substring       (const DBusString  *a,
 244                                                   int                a_start,
 245                                                   int                a_len,
 246                                                   const DBusString  *b,
 247                                                   int                b_start);
 248 dbus_bool_t   _dbus_string_starts_with_c_str     (const DBusString  *a,
 249                                                   const char        *c_str);
 250 dbus_bool_t   _dbus_string_ends_with_c_str       (const DBusString  *a,
 251                                                   const char        *c_str);
 252 dbus_bool_t   _dbus_string_pop_line              (DBusString        *source,
 253                                                   DBusString        *dest);
 254 void          _dbus_string_delete_first_word     (DBusString        *str);
 255 void          _dbus_string_delete_leading_blanks (DBusString        *str);
 256 dbus_bool_t   _dbus_string_append_byte_as_hex    (DBusString        *str,
 257                                                   int                byte);
 258 dbus_bool_t   _dbus_string_hex_encode            (const DBusString  *source,
 259                                                   int                start,
 260                                                   DBusString        *dest,
 261                                                   int                insert_at);
 262 dbus_bool_t   _dbus_string_hex_decode            (const DBusString  *source,
 263                                                   int                start,
 264                                                   int               *end_return,
 265                                                   DBusString        *dest,
 266                                                   int                insert_at);
 267 dbus_bool_t   _dbus_string_validate_ascii        (const DBusString  *str,
 268                                                   int                start,
 269                                                   int                len);
 270 dbus_bool_t   _dbus_string_validate_utf8         (const DBusString  *str,
 271                                                   int                start,
 272                                                   int                len);
 273 dbus_bool_t   _dbus_string_validate_nul          (const DBusString  *str,
 274                                                   int                start,
 275                                                   int                len);
 276 void          _dbus_string_zero                  (DBusString        *str);
 277
 278
 279 /**
 280  * We allocate 1 byte for nul termination, plus 7 bytes for possible
 281  * align_offset, so we always need 8 bytes on top of the string's
 282  * length to be in the allocated block.
 283  */
 284 #define _DBUS_STRING_ALLOCATION_PADDING 8
 285
 286 /**
 287  * Defines a static const variable with type #DBusString called "name"
 288  * containing the given string literal.
 289  *
 290  * @param name the name of the variable
 291  * @param str the string value
 292  */
 293 #define _DBUS_STRING_DEFINE_STATIC(name, str)                           \
 294   static const char _dbus_static_string_##name[] = str;                 \
 295   static const DBusString name = { _dbus_static_string_##name,          \
 296                                    sizeof(_dbus_static_string_##name),  \
 297                                    sizeof(_dbus_static_string_##name) + \
 298                                    _DBUS_STRING_ALLOCATION_PADDING,     \
 299                                    sizeof(_dbus_static_string_##name),  \
 300                                    TRUE, TRUE, FALSE, 0 }
 301
 302 DBUS_END_DECLS
 303
 304 #endif /* DBUS_STRING_H */