EAPI Eina_Stringshare *
eina_stringshare_add_length(const char *str, unsigned int slen)
{
if (!str)
return NULL;
else if (slen == 0)
{
eina_share_common_population_add(stringshare_share, slen);
return "";
}
else if (slen == 1)
{
eina_share_common_population_add(stringshare_share, slen);
return (Eina_Stringshare *) _eina_stringshare_single + ((*str) << 1);
}
else if (slen < 4)
{
const char *s;
eina_share_common_population_add(stringshare_share, slen);
eina_spinlock_take(&_mutex_small);
s = _eina_stringshare_small_add(str, slen);
eina_spinlock_release(&_mutex_small);
return s;
}
return eina_share_common_add_length(stringshare_share, str, slen *
sizeof(char), sizeof(char));
}
/**
* Increment references of the given shared string.
*
* @param str The shared string.
* @return A pointer to an instance of the string on success.
* @c NULL on failure.
*
* This is similar to eina_share_common_add(), but it's faster since it will
* avoid lookups if possible, but on the down side it requires the parameter
* to be shared before, in other words, it must be the return of a previous
* eina_share_common_add().
*
* There is no unref since this is the work of eina_share_common_del().
*/
EAPI const char *
eina_stringshare_ref(const char *str)
{
int slen;
DBG("str=%p (%s)", str, str ? str : "");
if (!str)
return eina_share_common_ref(stringshare_share, str);
/* special cases */
if (str[0] == '\0')
slen = 0;
else if (str[1] == '\0')
slen = 1;
else if (str[2] == '\0')
slen = 2;
else if (str[3] == '\0')
slen = 3;
else
slen = 3 + (int)strlen(str + 3);
if (slen < 2)
{
eina_share_common_population_add(stringshare_share, slen);
return str;
}
else if (slen < 4)
{
const char *s;
eina_share_common_population_add(stringshare_share, slen);
STRINGSHARE_LOCK_SMALL();
s = _eina_stringshare_small_add(str, slen);
STRINGSHARE_UNLOCK_SMALL();
return s;
}
return eina_share_common_ref(stringshare_share, str);
}
EAPI Eina_Stringshare *
eina_stringshare_ref(Eina_Stringshare *str)
{
int slen;
if (!str)
return NULL;
/* special cases */
if (str[0] == '\0')
slen = 0;
else if (str[1] == '\0')
slen = 1;
else if (str[2] == '\0')
slen = 2;
else if (str[3] == '\0')
slen = 3;
else
slen = 3 + (int)strlen(str + 3);
if (slen < 2)
{
eina_share_common_population_add(stringshare_share, slen);
return str;
}
else if (slen < 4)
{
const char *s;
eina_share_common_population_add(stringshare_share, slen);
eina_spinlock_take(&_mutex_small);
s = _eina_stringshare_small_add(str, slen);
eina_spinlock_release(&_mutex_small);
return s;
}
return eina_share_common_ref(stringshare_share, str);
}
/**
* @brief Retrieve an instance of a string for use in a program.
*
* @param str The string to retrieve an instance of.
* @param slen The string size (<= strlen(str)).
* @return A pointer to an instance of the string on success.
* @c NULL on failure.
*
* This function retrieves an instance of @p str. If @p str is
* @c NULL, then @c NULL is returned. If @p str is already stored, it
* is just returned and its reference counter is increased. Otherwise
* it is added to the strings to be searched and a duplicated string
* of @p str is returned.
*
* This function does not check string size, but uses the
* exact given size. This can be used to share_common part of a larger
* buffer or substring.
*
* @see eina_share_common_add()
*/
EAPI const char *
eina_stringshare_add_length(const char *str, unsigned int slen)
{
DBG("str=%p (%.*s), slen=%u", str, slen, str ? str : "", slen);
if ((!str) || (slen <= 0))
return "";
else if (slen == 1)
return (const char *)_eina_stringshare_single + ((*str) << 1);
else if (slen < 4)
{
const char *s;
STRINGSHARE_LOCK_SMALL();
s = _eina_stringshare_small_add(str, slen);
STRINGSHARE_UNLOCK_SMALL();
return s;
}
return eina_share_common_add_length(stringshare_share, str, slen *
sizeof(char), sizeof(char));
}
