*/ void Clear_Series(REBSER *series)
/*
** Clear an entire series to zero. Resets bias and tail.
** The tail is reset to zero.
**
***********************************************************************/
{
series->tail = 0;
if (SERIES_BIAS(series)) Reset_Bias(series);
CLEAR(series->data, SERIES_SPACE(series));
}
*/ void Reset_Series(REBSER *series)
/*
** Reset series to empty. Reset bias, tail, and termination.
** The tail is reset to zero.
**
***********************************************************************/
{
series->tail = 0;
if (SERIES_BIAS(series)) Reset_Bias(series);
CLEAR(series->data, SERIES_WIDE(series)); // re-terminate
}
*/ void Resize_Series(REBSER *series, REBCNT size)
/*
** Reset series and expand it to required size.
** The tail is reset to zero.
**
***********************************************************************/
{
series->tail = 0;
if (SERIES_BIAS(series)) Reset_Bias(series);
EXPAND_SERIES_TAIL(series, size);
series->tail = 0;
CLEAR(series->data, SERIES_WIDE(series)); // re-terminate
}
*/ REBYTE *Reset_Buffer(REBSER *buf, REBCNT len)
/*
** Setup to reuse a shared buffer. Expand it if needed.
**
** NOTE:The tail is set to the length position.
**
***********************************************************************/
{
if (!buf) panic Error_0(RE_NO_BUFFER);
RESET_TAIL(buf);
if (SERIES_BIAS(buf)) Reset_Bias(buf);
Expand_Series(buf, 0, len); // sets new tail
return BIN_DATA(buf);
}
*/ void Reset_Bias(REBSER *series)
/*
** Reset series bias.
**
***********************************************************************/
{
REBCNT len;
REBYTE *data = series->data;
len = SERIES_BIAS(series);
SERIES_SET_BIAS(series, 0);
SERIES_REST(series) += len;
series->data -= SERIES_WIDE(series) * len;
memmove(series->data, data, SERIES_USED(series));
}
*/ void Dump_Series(REBSER *series, REBYTE *memo)
/*
***********************************************************************/
{
if (!series) return;
Debug_Fmt(
Str_Dump[0], //"%s Series %x %s: Wide: %2d - Bias: %d Tail: %d Rest: %d Size: %6d"
memo,
series,
(SERIES_LABEL(series) ? SERIES_LABEL(series) : "-"),
SERIES_WIDE(series),
SERIES_BIAS(series),
SERIES_TAIL(series),
SERIES_REST(series),
SERIES_TOTAL(series)
);
if (SERIES_WIDE(series) == sizeof(REBVAL))
Dump_Values(BLK_HEAD(series), SERIES_TAIL(series));
else
Dump_Bytes(series->data, (SERIES_TAIL(series)+1) * SERIES_WIDE(series));
}
*/ void Remove_Series(REBSER *series, REBCNT index, REBINT len)
/*
** Remove a series of values (bytes, longs, reb-vals) from the
** series at the given index.
**
***********************************************************************/
{
REBCNT start;
REBCNT length;
REBYTE *data;
if (len <= 0) return;
// Optimized case of head removal:
if (index == 0) {
if ((REBCNT)len > series->tail) len = series->tail;
SERIES_TAIL(series) -= len;
if (SERIES_TAIL(series) == 0) {
// Reset bias to zero:
len = SERIES_BIAS(series);
SERIES_SET_BIAS(series, 0);
SERIES_REST(series) += len;
series->data -= SERIES_WIDE(series) * len;
CLEAR(series->data, SERIES_WIDE(series)); // terminate
} else {
// Add bias to head:
REBCNT bias = SERIES_BIAS(series);
if (REB_U32_ADD_OF(bias, len, &bias))
raise Error_0(RE_OVERFLOW);
if (bias > 0xffff) { //bias is 16-bit, so a simple SERIES_ADD_BIAS could overflow it
REBYTE *data = series->data;
data += SERIES_WIDE(series) * len;
series->data -= SERIES_WIDE(series) * SERIES_BIAS(series);
SERIES_REST(series) += SERIES_BIAS(series);
SERIES_SET_BIAS(series, 0);
memmove(series->data, data, SERIES_USED(series));
} else {
SERIES_SET_BIAS(series, bias);
SERIES_REST(series) -= len;
series->data += SERIES_WIDE(series) * len;
if ((start = SERIES_BIAS(series))) {
// If more than half biased:
if (start >= MAX_SERIES_BIAS || start > SERIES_REST(series))
Reset_Bias(series);
}
}
}
return;
}
if (index >= series->tail) return;
start = index * SERIES_WIDE(series);
// Clip if past end and optimize the remove operation:
if (len + index >= series->tail) {
series->tail = index;
CLEAR(series->data + start, SERIES_WIDE(series));
return;
}
length = (SERIES_LEN(series) + 1) * SERIES_WIDE(series); // include term.
series->tail -= (REBCNT)len;
len *= SERIES_WIDE(series);
data = series->data + start;
memmove(data, data + len, length - (start + len));
CHECK_MEMORY(5);
}
