reactos/dll/win32/jscript/jsstr.h
2013-06-16 22:01:41 +00:00

85 lines
2.4 KiB
C

/*
* Copyright 2012 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
struct _jsstr_t {
unsigned length_flags;
unsigned ref;
WCHAR str[1];
};
#define JSSTR_LENGTH_SHIFT 4
#define JSSTR_MAX_LENGTH (1 << (32-JSSTR_LENGTH_SHIFT))
#define JSSTR_FLAGS_MASK ((1 << JSSTR_LENGTH_SHIFT)-1)
#define JSSTR_FLAG_NULLBSTR 1
static inline unsigned jsstr_length(jsstr_t *str)
{
return str->length_flags >> JSSTR_LENGTH_SHIFT;
}
jsstr_t *jsstr_alloc_len(const WCHAR*,unsigned) DECLSPEC_HIDDEN;
jsstr_t *jsstr_alloc_buf(unsigned) DECLSPEC_HIDDEN;
static inline jsstr_t *jsstr_alloc(const WCHAR *str)
{
return jsstr_alloc_len(str, strlenW(str));
}
static inline void jsstr_release(jsstr_t *str)
{
if(!--str->ref)
heap_free(str);
}
static inline jsstr_t *jsstr_addref(jsstr_t *str)
{
str->ref++;
return str;
}
static inline BOOL jsstr_eq(jsstr_t *str1, jsstr_t *str2)
{
unsigned len = jsstr_length(str1);
return len == jsstr_length(str2) && !memcmp(str1->str, str2->str, len*sizeof(WCHAR));
}
static inline unsigned jsstr_flush(jsstr_t *str, WCHAR *buf)
{
unsigned len = jsstr_length(str);
memcpy(buf, str->str, len*sizeof(WCHAR));
return len;
}
static inline jsstr_t *jsstr_substr(jsstr_t *str, unsigned off, unsigned len)
{
return jsstr_alloc_len(str->str+off, len);
}
int jsstr_cmp(jsstr_t*,jsstr_t*) DECLSPEC_HIDDEN;
jsstr_t *jsstr_concat(jsstr_t*,jsstr_t*) DECLSPEC_HIDDEN;
jsstr_t *jsstr_nan(void) DECLSPEC_HIDDEN;
jsstr_t *jsstr_empty(void) DECLSPEC_HIDDEN;
jsstr_t *jsstr_undefined(void) DECLSPEC_HIDDEN;
BOOL init_strings(void) DECLSPEC_HIDDEN;
void free_strings(void) DECLSPEC_HIDDEN;
const char *debugstr_jsstr(jsstr_t*) DECLSPEC_HIDDEN;