/**
* @brief Steal the contents of a string buffer.
*
* @param buf The string buffer to steal.
* @return The current string in the string buffer.
*
* This function returns the string contained in @p buf. @p buf is
* then initialized and does not own the returned string anymore. The
* caller must release the memory of the returned string by calling
* free().
*
* @see eina_strbuf_common_string_get()
*/
void *eina_strbuf_common_string_steal(size_t csize, Eina_Strbuf * buf)
{
void *ret;
ret = buf->buf;
// TODO: Check return value and do something clever
_eina_strbuf_common_init(csize, buf);
return ret;
}
/**
* @internal
* @brief Create a new string buffer.
*
* @param csize the character size
* @return Newly allocated string buffer instance.
*
* This function creates a new string buffer. On error, @c NULL is
* returned. To free the resources, use eina_strbuf_common_free().
*
* @see eina_strbuf_common_free()
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_string_get()
*/
Eina_Strbuf *
eina_strbuf_common_new(size_t csize)
{
Eina_Strbuf *buf;
buf = calloc(1, sizeof(Eina_Strbuf));
if (EINA_UNLIKELY(!buf)) return NULL;
if (EINA_UNLIKELY(!_eina_strbuf_common_init(csize, buf)))
{
eina_strbuf_common_free(buf);
return NULL;
}
return buf;
}
/**
* @internal
* @brief Reset a string buffer.
*
* @param csize the character size
* @param buf The string buffer to reset.
*
* This function reset @p buf: the buffer len is set to 0, and the
* string is set to '\\0'. No memory is free'd.
*/
void
eina_strbuf_common_reset(size_t csize, Eina_Strbuf *buf)
{
/* This is a read only buffer which need change to be made */
if (buf->ro)
{
_eina_strbuf_common_init(csize, buf);
buf->ro = EINA_FALSE;
return ;
}
buf->len = 0;
buf->step = EINA_STRBUF_INIT_STEP;
memset(buf->buf, 0, csize);
}
/**
* @brief Create a new string buffer.
*
* @return Newly allocated string buffer instance.
*
* This function creates a new string buffer. On error, @c NULL is
* returned and Eina error is set to #EINA_ERROR_OUT_OF_MEMORY. To
* free the resources, use eina_strbuf_common_free().
*
* @see eina_strbuf_common_free()
* @see eina_strbuf_common_append()
* @see eina_strbuf_common_string_get()
*/
Eina_Strbuf *eina_strbuf_common_new(size_t csize)
{
Eina_Strbuf *buf;
eina_error_set(0);
buf = malloc(sizeof(Eina_Strbuf));
if (EINA_UNLIKELY(!buf)) {
eina_error_set(EINA_ERROR_OUT_OF_MEMORY);
return NULL;
}
if (EINA_UNLIKELY(!_eina_strbuf_common_init(csize, buf))) {
eina_strbuf_common_free(buf);
return NULL;
}
return buf;
}
/**
* @internal
* @brief Steal the contents of a string buffer.
*
* @param csize the character size
* @param buf The string buffer to steal.
* @return The current string in the string buffer.
*
* This function returns the string contained in @p buf. @p buf is
* then initialized and does not own the returned string anymore. The
* caller must release the memory of the returned string by calling
* free().
*
* @see eina_strbuf_common_string_get()
*/
void *
eina_strbuf_common_string_steal(size_t csize, Eina_Strbuf *buf)
{
void *ret;
// If the buffer is ro, the caller would have to do additional
// test to detect if it is the same string or not. Let's make
// life for everyone easy.
if (buf->ro)
{
char *dest;
dest = malloc(buf->size);
if (!dest) return 0;
memcpy(dest, buf->buf, buf->len);
buf->buf = dest;
}
ret = buf->buf;
// TODO: Check return value and do something clever
_eina_strbuf_common_init(csize, buf);
return ret;
}
/**
* @brief Remove a slice of the given string buffer.
*
* @param buf The string buffer to remove a slice.
* @param start The initial (inclusive) slice position to start
* removing, in bytes.
* @param end The final (non-inclusive) slice position to finish
* removing, in bytes.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function removes a slice of @p buf, starting at @p start
* (inclusive) and ending at @p end (non-inclusive). Both values are
* in bytes. It returns #EINA_FALSE on failure, #EINA_TRUE otherwise.
*/
Eina_Bool
eina_strbuf_common_remove(size_t csize,
Eina_Strbuf * buf, size_t start, size_t end)
{
size_t remove_len, tail_len;
if (end >= buf->len)
end = buf->len;
if (end <= start)
return EINA_TRUE;
remove_len = end - start;
if (remove_len == buf->len) {
free(buf->buf);
return _eina_strbuf_common_init(csize, buf);
}
tail_len = buf->len - end + 1; /* includes '\0' */
memmove(buf->buf + (start * csize),
buf->buf + (end * csize), tail_len * csize);
buf->len -= remove_len;
return _eina_strbuf_common_resize(csize, buf, buf->len);
}
/**
* @internal
* @brief Remove a slice of the given string buffer.
*
* @param csize the character size
* @param buf The string buffer to remove a slice.
* @param start The initial (inclusive) slice position to start
* removing, in bytes.
* @param end The final (non-inclusive) slice position to finish
* removing, in bytes.
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function removes a slice of @p buf, starting at @p start
* (inclusive) and ending at @p end (non-inclusive). Both values are
* in bytes. It returns #EINA_FALSE on failure, #EINA_TRUE otherwise.
*/
Eina_Bool
eina_strbuf_common_remove(size_t csize,
Eina_Strbuf *buf,
size_t start,
size_t end)
{
size_t remove_len, tail_len;
if (end >= buf->len) end = buf->len;
if (end <= start) return EINA_TRUE;
/* This is a read only buffer which need change to be made */
if (buf->ro)
{
char *dest;
dest = malloc(buf->size);
if (!dest) return 0;
memcpy(dest, buf->buf, buf->len);
buf->buf = dest;
}
remove_len = end - start;
if (remove_len == buf->len)
{
free(buf->buf);
return _eina_strbuf_common_init(csize, buf);
}
tail_len = buf->len - end + 1; /* includes '\0' */
memmove(((unsigned char *)(buf->buf)) + (start * csize),
((unsigned char *)(buf->buf)) + (end * csize),
tail_len * csize);
buf->len -= remove_len;
return _eina_strbuf_common_resize(csize, buf, buf->len);
}
/**
* @brief Free the contents of a string buffer but not the buffer.
*
* @param buf The string buffer to free the string of.
*
* This function frees the string contained in @p buf without freeing
* @p buf.
*/
void eina_strbuf_common_string_free(size_t csize, Eina_Strbuf * buf)
{
free(buf->buf);
_eina_strbuf_common_init(csize, buf);
}
