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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:19:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:20:17 +0000 |
commit | a64a253794ac64cb40befee54db53bde17dd0d49 (patch) | |
tree | c1024acc5f6e508814b944d99f112259bb28b1be /web/api/queries/incremental_sum/incremental_sum.c | |
parent | New upstream version 1.10.0+dfsg (diff) | |
download | netdata-upstream/1.11.0+dfsg.tar.xz netdata-upstream/1.11.0+dfsg.zip |
New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | web/api/queries/incremental_sum/incremental_sum.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/web/api/queries/incremental_sum/incremental_sum.c b/web/api/queries/incremental_sum/incremental_sum.c new file mode 100644 index 000000000..131d85d78 --- /dev/null +++ b/web/api/queries/incremental_sum/incremental_sum.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "incremental_sum.h" + +// ---------------------------------------------------------------------------- +// incremental sum + +struct grouping_incremental_sum { + calculated_number first; + calculated_number last; + size_t count; +}; + +void *grouping_create_incremental_sum(RRDR *r) { + (void)r; + return callocz(1, sizeof(struct grouping_incremental_sum)); +} + +// resets when switches dimensions +// so, clear everything to restart +void grouping_reset_incremental_sum(RRDR *r) { + struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data; + g->first = 0; + g->last = 0; + g->count = 0; +} + +void grouping_free_incremental_sum(RRDR *r) { + freez(r->internal.grouping_data); + r->internal.grouping_data = NULL; +} + +void grouping_add_incremental_sum(RRDR *r, calculated_number value) { + if(!isnan(value)) { + struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data; + + if(unlikely(!g->count)) { + g->first = value; + g->count++; + } + else { + g->last = value; + g->count++; + } + } +} + +calculated_number grouping_flush_incremental_sum(RRDR *r, RRDR_VALUE_FLAGS *rrdr_value_options_ptr) { + struct grouping_incremental_sum *g = (struct grouping_incremental_sum *)r->internal.grouping_data; + + calculated_number value; + + if(unlikely(!g->count)) { + value = 0.0; + *rrdr_value_options_ptr |= RRDR_VALUE_EMPTY; + } + else if(unlikely(g->count == 1)) { + value = 0.0; + } + else { + value = g->last - g->first; + } + + g->first = 0.0; + g->last = 0.0; + g->count = 0; + + return value; +} |