1 files changed, 120 insertions, 0 deletions
diff --git a/src/rrdsetvar.c b/src/rrdsetvar.c
new file mode 100644
index 000000000..03d7aeced
--- /dev/null
+++ b/src/rrdsetvar.c
@@ -0,0 +1,120 @@
+#define NETDATA_HEALTH_INTERNALS
+#include "common.h"
+
+// ----------------------------------------------------------------------------
+// RRDSETVAR management
+// CHART VARIABLES
+
+static inline void rrdsetvar_free_variables(RRDSETVAR *rs) {
+    RRDSET *st = rs->rrdset;
+
+    // CHART
+
+    rrdvar_free(st->rrdhost, &st->variables_root_index, rs->var_local);
+    rs->var_local = NULL;
+
+    // FAMILY
+
+    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family);
+    rs->var_family = NULL;
+
+    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host);
+    rs->var_host = NULL;
+
+    // HOST
+
+    rrdvar_free(st->rrdhost, &st->rrdfamily->variables_root_index, rs->var_family_name);
+    rs->var_family_name = NULL;
+
+    rrdvar_free(st->rrdhost, &st->rrdhost->variables_root_index, rs->var_host_name);
+    rs->var_host_name = NULL;
+
+    // KEYS
+
+    freez(rs->key_fullid);
+    rs->key_fullid = NULL;
+
+    freez(rs->key_fullname);
+    rs->key_fullname = NULL;
+}
+
+static inline void rrdsetvar_create_variables(RRDSETVAR *rs) {
+    rrdsetvar_free_variables(rs);
+
+    RRDSET *st = rs->rrdset;
+
+    // KEYS
+
+    char buffer[RRDVAR_MAX_LENGTH + 1];
+    snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->id, rs->variable);
+    rs->key_fullid = strdupz(buffer);
+
+    snprintfz(buffer, RRDVAR_MAX_LENGTH, "%s.%s", st->name, rs->variable);
+    rs->key_fullname = strdupz(buffer);
+
+    // CHART
+
+    rs->var_local       = rrdvar_create_and_index("local",  &st->variables_root_index,               rs->variable, rs->type, rs->value);
+
+    // FAMILY
+
+    rs->var_family      = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index,    rs->key_fullid,   rs->type, rs->value);
+    rs->var_family_name = rrdvar_create_and_index("family", &st->rrdfamily->variables_root_index,    rs->key_fullname, rs->type, rs->value);
+
+    // HOST
+
+    rs->var_host        = rrdvar_create_and_index("host",   &st->rrdhost->variables_root_index,      rs->key_fullid,   rs->type, rs->value);
+    rs->var_host_name   = rrdvar_create_and_index("host",   &st->rrdhost->variables_root_index,      rs->key_fullname, rs->type, rs->value);
+
+}
+
+RRDSETVAR *rrdsetvar_create(RRDSET *st, const char *variable, int type, void *value, uint32_t options) {
+    debug(D_VARIABLES, "RRDVARSET create for chart id '%s' name '%s' with variable name '%s'", st->id, st->name, variable);
+    RRDSETVAR *rs = (RRDSETVAR *)callocz(1, sizeof(RRDSETVAR));
+
+    rs->variable = strdupz(variable);
+    rs->type = type;
+    rs->value = value;
+    rs->options = options;
+    rs->rrdset = st;
+
+    rs->next = st->variables;
+    st->variables = rs;
+
+    rrdsetvar_create_variables(rs);
+
+    return rs;
+}
+
+void rrdsetvar_rename_all(RRDSET *st) {
+    debug(D_VARIABLES, "RRDSETVAR rename for chart id '%s' name '%s'", st->id, st->name);
+
+    RRDSETVAR *rs, *next = st->variables;
+    while((rs = next)) {
+        next = rs->next;
+        rrdsetvar_create_variables(rs);
+    }
+
+    rrdsetcalc_link_matching(st);
+}
+
+void rrdsetvar_free(RRDSETVAR *rs) {
+    RRDSET *st = rs->rrdset;
+    debug(D_VARIABLES, "RRDSETVAR free for chart id '%s' name '%s', variable '%s'", st->id, st->name, rs->variable);
+
+    if(st->variables == rs) {
+        st->variables = rs->next;
+    }
+    else {
+        RRDSETVAR *t;
+        for (t = st->variables; t && t->next != rs; t = t->next);
+        if(!t) error("RRDSETVAR '%s' not found in chart '%s' variables linked list", rs->key_fullname, st->id);
+        else t->next = rs->next;
+    }
+
+    rrdsetvar_free_variables(rs);
+
+    freez(rs->variable);
+    freez(rs);
+}
+