From 1e6c93250172946eeb38e94a92a1fd12c9d3011e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 7 Nov 2018 13:22:44 +0100 Subject: Merging upstream version 1.11.0+dfsg. Signed-off-by: Daniel Baumann --- web/api/queries/median/median.c | 79 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 web/api/queries/median/median.c (limited to 'web/api/queries/median/median.c') diff --git a/web/api/queries/median/median.c b/web/api/queries/median/median.c new file mode 100644 index 000000000..5a13b2e4d --- /dev/null +++ b/web/api/queries/median/median.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "median.h" + + +// ---------------------------------------------------------------------------- +// median + +struct grouping_median { + size_t series_size; + size_t next_pos; + + LONG_DOUBLE series[]; +}; + +void *grouping_create_median(RRDR *r) { + long entries = r->group; + if(entries < 0) entries = 0; + + struct grouping_median *g = (struct grouping_median *)callocz(1, sizeof(struct grouping_median) + entries * sizeof(LONG_DOUBLE)); + g->series_size = (size_t)entries; + + return g; +} + +// resets when switches dimensions +// so, clear everything to restart +void grouping_reset_median(RRDR *r) { + struct grouping_median *g = (struct grouping_median *)r->internal.grouping_data; + g->next_pos = 0; +} + +void grouping_free_median(RRDR *r) { + freez(r->internal.grouping_data); + r->internal.grouping_data = NULL; +} + +void grouping_add_median(RRDR *r, calculated_number value) { + struct grouping_median *g = (struct grouping_median *)r->internal.grouping_data; + + if(unlikely(g->next_pos >= g->series_size)) { + error("INTERNAL ERROR: median buffer overflow on chart '%s' - next_pos = %zu, series_size = %zu, r->group = %ld.", r->st->name, g->next_pos, g->series_size, r->group); + } + else { + if(isnormal(value)) + g->series[g->next_pos++] = (LONG_DOUBLE)value; + } +} + +calculated_number grouping_flush_median(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) { + struct grouping_median *g = (struct grouping_median *)r->internal.grouping_data; + + calculated_number value; + + if(unlikely(!g->next_pos)) { + value = 0.0; + *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY; + } + else { + if(g->next_pos > 1) { + sort_series(g->series, g->next_pos); + value = (calculated_number)median_on_sorted_series(g->series, g->next_pos); + } + else + value = (calculated_number)g->series[0]; + + if(!isnormal(value)) { + value = 0.0; + *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY; + } + + //log_series_to_stderr(g->series, g->next_pos, value, "median"); + } + + g->next_pos = 0; + + return value; +} + -- cgit v1.2.3