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-rw-r--r--web/api/formatters/value/value.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/web/api/formatters/value/value.c b/web/api/formatters/value/value.c
new file mode 100644
index 0000000..aea6c16
--- /dev/null
+++ b/web/api/formatters/value/value.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "value.h"
+
+
+inline calculated_number rrdr2value(RRDR *r, long i, RRDR_OPTIONS options, int *all_values_are_null) {
+ rrdset_check_rdlock(r->st);
+
+ long c;
+ RRDDIM *d;
+
+ calculated_number *cn = &r->v[ i * r->d ];
+ RRDR_VALUE_FLAGS *co = &r->o[ i * r->d ];
+
+ calculated_number sum = 0, min = 0, max = 0, v;
+ int all_null = 1, init = 1;
+
+ calculated_number total = 1;
+ int set_min_max = 0;
+ if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
+ total = 0;
+ for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
+ calculated_number n = cn[c];
+
+ if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
+ n = -n;
+
+ total += n;
+ }
+ // prevent a division by zero
+ if(total == 0) total = 1;
+ set_min_max = 1;
+ }
+
+ // for each dimension
+ for(c = 0, d = r->st->dimensions; d && c < r->d ;c++, d = d->next) {
+ if(unlikely(r->od[c] & RRDR_DIMENSION_HIDDEN)) continue;
+ if(unlikely((options & RRDR_OPTION_NONZERO) && !(r->od[c] & RRDR_DIMENSION_NONZERO))) continue;
+
+ calculated_number n = cn[c];
+
+ if(likely((options & RRDR_OPTION_ABSOLUTE) && n < 0))
+ n = -n;
+
+ if(unlikely(options & RRDR_OPTION_PERCENTAGE)) {
+ n = n * 100 / total;
+
+ if(unlikely(set_min_max)) {
+ r->min = r->max = n;
+ set_min_max = 0;
+ }
+
+ if(n < r->min) r->min = n;
+ if(n > r->max) r->max = n;
+ }
+
+ if(unlikely(init)) {
+ if(n > 0) {
+ min = 0;
+ max = n;
+ }
+ else {
+ min = n;
+ max = 0;
+ }
+ init = 0;
+ }
+
+ if(likely(!(co[c] & RRDR_VALUE_EMPTY))) {
+ all_null = 0;
+ sum += n;
+ }
+
+ if(n < min) min = n;
+ if(n > max) max = n;
+ }
+
+ if(unlikely(all_null)) {
+ if(likely(all_values_are_null))
+ *all_values_are_null = 1;
+ return 0;
+ }
+ else {
+ if(likely(all_values_are_null))
+ *all_values_are_null = 0;
+ }
+
+ if(options & RRDR_OPTION_MIN2MAX)
+ v = max - min;
+ else
+ v = sum;
+
+ return v;
+}