dlls/jscript/jsstr.h

   1 /*
   2  * Copyright 2012 Jacek Caban for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 struct _jsstr_t {
  20     unsigned length_flags;
  21     unsigned ref;
  22     WCHAR str[1];
  23 };
  24
  25 #define JSSTR_LENGTH_SHIFT 4
  26 #define JSSTR_MAX_LENGTH (1 << (32-JSSTR_LENGTH_SHIFT))
  27 #define JSSTR_FLAGS_MASK ((1 << JSSTR_LENGTH_SHIFT)-1)
  28
  29 #define JSSTR_FLAG_NULLBSTR 1
  30
  31 static inline unsigned jsstr_length(jsstr_t *str)
  32 {
  33     return str->length_flags >> JSSTR_LENGTH_SHIFT;
  34 }
  35
  36 jsstr_t *jsstr_alloc_len(const WCHAR*,unsigned) DECLSPEC_HIDDEN;
  37 jsstr_t *jsstr_alloc_buf(unsigned) DECLSPEC_HIDDEN;
  38
  39 static inline jsstr_t *jsstr_alloc(const WCHAR *str)
  40 {
  41     return jsstr_alloc_len(str, strlenW(str));
  42 }
  43
  44 static inline void jsstr_release(jsstr_t *str)
  45 {
  46     if(!--str->ref)
  47         heap_free(str);
  48 }
  49
  50 static inline jsstr_t *jsstr_addref(jsstr_t *str)
  51 {
  52     str->ref++;
  53     return str;
  54 }
  55
  56 static inline BOOL jsstr_eq(jsstr_t *str1, jsstr_t *str2)
  57 {
  58     unsigned len = jsstr_length(str1);
  59     return len == jsstr_length(str2) && !memcmp(str1->str, str2->str, len*sizeof(WCHAR));
  60 }
  61
  62 int jsstr_cmp(jsstr_t*,jsstr_t*) DECLSPEC_HIDDEN;
  63
  64 jsstr_t *jsstr_nan(void) DECLSPEC_HIDDEN;
  65 jsstr_t *jsstr_empty(void) DECLSPEC_HIDDEN;
  66
  67 BOOL init_strings(void) DECLSPEC_HIDDEN;
  68 void free_strings(void) DECLSPEC_HIDDEN;
  69
  70 const char *debugstr_jsstr(jsstr_t*) DECLSPEC_HIDDEN;