netdata doubles (#13217)

* netdata doubles

* fix cmocka test

* fix cmocka test again

* fix left-overs of long double to NETDATA_DOUBLE

* RRDDIM detached from disk representation; db settings in [db] section of netdata.conf

* update the memory before saving

* rrdset is now detached from file structures too

* on memory mode map, update the memory mapped structures on every iteration

* allow RRD_ID_LENGTH_MAX to be changed

* granularity secs, back to update every

* fix formatting

* more formatting

17 files changed, 369 insertions, 358 deletions

diff --git a/libnetdata/buffer/buffer.c b/libnetdata/buffer/buffer.c
index 880417551b..8a32184f60 100644
--- a/libnetdata/buffer/buffer.c
+++ b/libnetdata/buffer/buffer.c
@@ -65,9 +65,9 @@ void buffer_char_replace(BUFFER *wb, char from, char to)
 }
 
 // This trick seems to give an 80% speed increase in 32bit systems
-// print_calculated_number_llu_r() will just print the digits up to the
+// print_number_llu_r() will just print the digits up to the
 // point the remaining value fits in 32 bits, and then calls
-// print_calculated_number_lu_r() to print the rest with 32 bit arithmetic.
+// print_number_lu_r() to print the rest with 32 bit arithmetic.
 
 inline char *print_number_lu_r(char *str, unsigned long uvalue) {
     char *wstr = str;
@@ -299,7 +299,7 @@ void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
 }
 
 
-void buffer_rrd_value(BUFFER *wb, calculated_number value)
+void buffer_rrd_value(BUFFER *wb, NETDATA_DOUBLE value)
 {
     buffer_need_bytes(wb, 50);
 
@@ -308,7 +308,7 @@ void buffer_rrd_value(BUFFER *wb, calculated_number value)
         return;
     }
     else
-        wb->len += print_calculated_number(&wb->buffer[wb->len], value);
+        wb->len += print_netdata_double(&wb->buffer[wb->len], value);
 
     // terminate it
     buffer_need_bytes(wb, 1);
diff --git a/libnetdata/buffer/buffer.h b/libnetdata/buffer/buffer.h
index ceaeadd9b7..42425b4cb7 100644
--- a/libnetdata/buffer/buffer.h
+++ b/libnetdata/buffer/buffer.h
@@ -56,7 +56,7 @@ extern void buffer_reset(BUFFER *wb);
 
 extern void buffer_strcat(BUFFER *wb, const char *txt);
 extern void buffer_fast_strcat(BUFFER *wb, const char *txt, size_t len);
-extern void buffer_rrd_value(BUFFER *wb, calculated_number value);
+extern void buffer_rrd_value(BUFFER *wb, NETDATA_DOUBLE value);
 
 extern void buffer_date(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);
 extern void buffer_jsdate(BUFFER *wb, int year, int month, int day, int hours, int minutes, int seconds);
diff --git a/libnetdata/clocks/clocks.c b/libnetdata/clocks/clocks.c
index f0e17b232b..e4dca6c8b7 100644
--- a/libnetdata/clocks/clocks.c
+++ b/libnetdata/clocks/clocks.c
@@ -393,7 +393,7 @@ static inline collected_number read_proc_uptime(char *filename) {
         return 0;
     }
 
-    return (collected_number)(strtold(procfile_lineword(read_proc_uptime_ff, 0, 0), NULL) * 1000.0);
+    return (collected_number)(strtondd(procfile_lineword(read_proc_uptime_ff, 0, 0), NULL) * 1000.0);
 }
 
 inline collected_number uptime_msec(char *filename){
diff --git a/libnetdata/config/appconfig.c b/libnetdata/config/appconfig.c
index 56e703e35d..1288366da8 100644
--- a/libnetdata/config/appconfig.c
+++ b/libnetdata/config/appconfig.c
@@ -462,15 +462,15 @@ long long appconfig_get_number(struct config *root, const char *section, const c
     return strtoll(s, NULL, 0);
 }
 
-LONG_DOUBLE appconfig_get_float(struct config *root, const char *section, const char *name, LONG_DOUBLE value)
+NETDATA_DOUBLE appconfig_get_float(struct config *root, const char *section, const char *name, NETDATA_DOUBLE value)
 {
     char buffer[100], *s;
-    sprintf(buffer, "%0.5" LONG_DOUBLE_MODIFIER, value);
+    sprintf(buffer, "%0.5" NETDATA_DOUBLE_MODIFIER, value);
 
     s = appconfig_get(root, section, name, buffer);
     if(!s) return value;
 
-    return str2ld(s, NULL);
+    return str2ndd(s, NULL);
 }
 
 static inline int appconfig_test_boolean_value(char *s) {
@@ -588,10 +588,10 @@ long long appconfig_set_number(struct config *root, const char *section, const c
     return value;
 }
 
-LONG_DOUBLE appconfig_set_float(struct config *root, const char *section, const char *name, LONG_DOUBLE value)
+NETDATA_DOUBLE appconfig_set_float(struct config *root, const char *section, const char *name, NETDATA_DOUBLE value)
 {
     char buffer[100];
-    sprintf(buffer, "%0.5" LONG_DOUBLE_MODIFIER, value);
+    sprintf(buffer, "%0.5" NETDATA_DOUBLE_MODIFIER, value);
 
     appconfig_set(root, section, name, buffer);
 
@@ -831,26 +831,27 @@ void appconfig_generate(struct config *root, BUFFER *wb, int only_changed)
                   "#\n"
                   "\n# global netdata configuration\n");
 
-    for(i = 0; i <= 15 ;i++) {
+    for(i = 0; i <= 16 ;i++) {
         appconfig_wrlock(root);
         for(co = root->first_section; co ; co = co->next) {
             if(!strcmp(co->name, CONFIG_SECTION_GLOBAL))                 pri = 0;
-            else if(!strcmp(co->name, CONFIG_SECTION_DIRECTORIES))       pri = 1;
-            else if(!strcmp(co->name, CONFIG_SECTION_LOGS))              pri = 2;
-            else if(!strcmp(co->name, CONFIG_SECTION_ENV_VARS))          pri = 3;
-            else if(!strcmp(co->name, CONFIG_SECTION_HOST_LABEL))        pri = 4;
-            else if(!strcmp(co->name, CONFIG_SECTION_SQLITE))            pri = 5;
-            else if(!strcmp(co->name, CONFIG_SECTION_CLOUD))             pri = 6;
-            else if(!strcmp(co->name, CONFIG_SECTION_ML))                pri = 7;
-            else if(!strcmp(co->name, CONFIG_SECTION_HEALTH))            pri = 8;
-            else if(!strcmp(co->name, CONFIG_SECTION_WEB))               pri = 9;
-            // by default, new sections will get pri = 10 (set at the end, below)
-            else if(!strcmp(co->name, CONFIG_SECTION_REGISTRY))          pri = 11;
-            else if(!strcmp(co->name, CONFIG_SECTION_GLOBAL_STATISTICS)) pri = 12;
-            else if(!strcmp(co->name, CONFIG_SECTION_PLUGINS))           pri = 13;
-            else if(!strcmp(co->name, CONFIG_SECTION_STATSD))            pri = 14;
-            else if(!strncmp(co->name, "plugin:", 7))                    pri = 15; // << change the loop too if you change this
-            else pri = 10; // this is used for any new (currently unknown) sections
+            else if(!strcmp(co->name, CONFIG_SECTION_DB))                pri = 1;
+            else if(!strcmp(co->name, CONFIG_SECTION_DIRECTORIES))       pri = 2;
+            else if(!strcmp(co->name, CONFIG_SECTION_LOGS))              pri = 3;
+            else if(!strcmp(co->name, CONFIG_SECTION_ENV_VARS))          pri = 4;
+            else if(!strcmp(co->name, CONFIG_SECTION_HOST_LABEL))        pri = 5;
+            else if(!strcmp(co->name, CONFIG_SECTION_SQLITE))            pri = 6;
+            else if(!strcmp(co->name, CONFIG_SECTION_CLOUD))             pri = 7;
+            else if(!strcmp(co->name, CONFIG_SECTION_ML))                pri = 8;
+            else if(!strcmp(co->name, CONFIG_SECTION_HEALTH))            pri = 9;
+            else if(!strcmp(co->name, CONFIG_SECTION_WEB))               pri = 10;
+            // by default, new sections will get pri = 11 (set at the end, below)
+            else if(!strcmp(co->name, CONFIG_SECTION_REGISTRY))          pri = 12;
+            else if(!strcmp(co->name, CONFIG_SECTION_GLOBAL_STATISTICS)) pri = 13;
+            else if(!strcmp(co->name, CONFIG_SECTION_PLUGINS))           pri = 14;
+            else if(!strcmp(co->name, CONFIG_SECTION_STATSD))            pri = 15;
+            else if(!strncmp(co->name, "plugin:", 7))                    pri = 16; // << change the loop too if you change this
+            else pri = 11; // this is used for any new (currently unknown) sections
 
             if(i == pri) {
                 int loaded = 0;
@@ -916,7 +917,7 @@ int config_parse_duration(const char* string, int* result) {
     if(!(isdigit(*string) || *string == '+' || *string == '-')) goto fallback;
 
     char *e = NULL;
-    calculated_number n = str2ld(string, &e);
+    NETDATA_DOUBLE n = str2ndd(string, &e);
     if(e && *e) {
         switch (*e) {
             case 'Y':
diff --git a/libnetdata/config/appconfig.h b/libnetdata/config/appconfig.h
index f1f61e31d3..d72a3140e8 100644
--- a/libnetdata/config/appconfig.h
+++ b/libnetdata/config/appconfig.h
@@ -100,6 +100,8 @@
 #define CONFIG_SECTION_HOST_LABEL         "host labels"
 #define EXPORTING_CONF                    "exporting.conf"
 #define CONFIG_SECTION_GLOBAL_STATISTICS  "global statistics"
+#define CONFIG_SECTION_DB                 "db"
+
 
 // these are used to limit the configuration names and values lengths
 // they are not enforced by config.c functions (they will strdup() all strings, no matter of their length)
@@ -168,7 +170,7 @@ extern void config_section_unlock(struct section *co);
 extern char *appconfig_get_by_section(struct section *co, const char *name, const char *default_value);
 extern char *appconfig_get(struct config *root, const char *section, const char *name, const char *default_value);
 extern long long appconfig_get_number(struct config *root, const char *section, const char *name, long long value);
-extern LONG_DOUBLE appconfig_get_float(struct config *root, const char *section, const char *name, LONG_DOUBLE value);
+extern NETDATA_DOUBLE appconfig_get_float(struct config *root, const char *section, const char *name, NETDATA_DOUBLE value);
 extern int appconfig_get_boolean_by_section(struct section *co, const char *name, int value);
 extern int appconfig_get_boolean(struct config *root, const char *section, const char *name, int value);
 extern int appconfig_get_boolean_ondemand(struct config *root, const char *section, const char *name, int value);
@@ -177,7 +179,7 @@ extern int appconfig_get_duration(struct config *root, const char *section, cons
 extern const char *appconfig_set(struct config *root, const char *section, const char *name, const char *value);
 extern const char *appconfig_set_default(struct config *root, const char *section, const char *name, const char *value);
 extern long long appconfig_set_number(struct config *root, const char *section, const char *name, long long value);
-extern LONG_DOUBLE appconfig_set_float(struct config *root, const char *section, const char *name, LONG_DOUBLE value);
+extern NETDATA_DOUBLE appconfig_set_float(struct config *root, const char *section, const char *name, NETDATA_DOUBLE value);
 extern int appconfig_set_boolean(struct config *root, const char *section, const char *name, int value);
 
 extern int appconfig_exists(struct config *root, const char *section, const char *name);
diff --git a/libnetdata/eval/eval.c b/libnetdata/eval/eval.c
index 7ca45882f7..e86cbd587e 100644
--- a/libnetdata/eval/eval.c
+++ b/libnetdata/eval/eval.c
@@ -9,7 +9,7 @@ typedef struct eval_value {
     int type;
 
     union {
-        calculated_number number;
+        NETDATA_DOUBLE number;
         EVAL_VARIABLE *variable;
         struct eval_node *expression;
     };
@@ -54,16 +54,16 @@ typedef struct eval_node {
 static inline void eval_node_free(EVAL_NODE *op);
 static inline EVAL_NODE *parse_full_expression(const char **string, int *error);
 static inline EVAL_NODE *parse_one_full_operand(const char **string, int *error);
-static inline calculated_number eval_node(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error);
+static inline NETDATA_DOUBLE eval_node(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error);
 static inline void print_parsed_as_node(BUFFER *out, EVAL_NODE *op, int *error);
-static inline void print_parsed_as_constant(BUFFER *out, calculated_number n);
+static inline void print_parsed_as_constant(BUFFER *out, NETDATA_DOUBLE n);
 
 // ----------------------------------------------------------------------------
 // evaluation of expressions
 
-static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABLE *v, int *error) {
+static inline NETDATA_DOUBLE eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABLE *v, int *error) {
     static uint32_t this_hash = 0, now_hash = 0, after_hash = 0, before_hash = 0, status_hash = 0, removed_hash = 0, uninitialized_hash = 0, undefined_hash = 0, clear_hash = 0, warning_hash = 0, critical_hash = 0;
-    calculated_number n;
+    NETDATA_DOUBLE n;
 
     if(unlikely(this_hash == 0)) {
         this_hash = simple_hash("this");
@@ -179,8 +179,8 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
     return NAN;
 }
 
-static inline calculated_number eval_value(EVAL_EXPRESSION *exp, EVAL_VALUE *v, int *error) {
-    calculated_number n;
+static inline NETDATA_DOUBLE eval_value(EVAL_EXPRESSION *exp, EVAL_VALUE *v, int *error) {
+    NETDATA_DOUBLE n;
 
     switch(v->type) {
         case EVAL_VALUE_EXPRESSION:
@@ -204,101 +204,101 @@ static inline calculated_number eval_value(EVAL_EXPRESSION *exp, EVAL_VALUE *v,
     return n;
 }
 
-static inline int is_true(calculated_number n) {
+static inline int is_true(NETDATA_DOUBLE n) {
     if(isnan(n)) return 0;
     if(isinf(n)) return 1;
     if(n == 0) return 0;
     return 1;
 }
 
-calculated_number eval_and(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_and(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return is_true(eval_value(exp, &op->ops[0], error)) && is_true(eval_value(exp, &op->ops[1], error));
 }
-calculated_number eval_or(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_or(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return is_true(eval_value(exp, &op->ops[0], error)) || is_true(eval_value(exp, &op->ops[1], error));
 }
-calculated_number eval_greater_than_or_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_greater_than_or_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     return isgreaterequal(n1, n2);
 }
-calculated_number eval_less_than_or_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_less_than_or_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     return islessequal(n1, n2);
 }
-calculated_number eval_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     if(isnan(n1) && isnan(n2)) return 1;
     if(isinf(n1) && isinf(n2)) return 1;
     if(isnan(n1) || isnan(n2)) return 0;
     if(isinf(n1) || isinf(n2)) return 0;
-    return calculated_number_equal(n1, n2);
+    return considered_equal_ndd(n1, n2);
 }
-calculated_number eval_not_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_not_equal(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return !eval_equal(exp, op, error);
 }
-calculated_number eval_less(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_less(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     return isless(n1, n2);
 }
-calculated_number eval_greater(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_greater(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     return isgreater(n1, n2);
 }
-calculated_number eval_plus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_plus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     if(isnan(n1) || isnan(n2)) return NAN;
     if(isinf(n1) || isinf(n2)) return INFINITY;
     return n1 + n2;
 }
-calculated_number eval_minus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_minus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     if(isnan(n1) || isnan(n2)) return NAN;
     if(isinf(n1) || isinf(n2)) return INFINITY;
     return n1 - n2;
 }
-calculated_number eval_multiply(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_multiply(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     if(isnan(n1) || isnan(n2)) return NAN;
     if(isinf(n1) || isinf(n2)) return INFINITY;
     return n1 * n2;
 }
-calculated_number eval_divide(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
-    calculated_number n2 = eval_value(exp, &op->ops[1], error);
+NETDATA_DOUBLE eval_divide(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
+    NETDATA_DOUBLE n2 = eval_value(exp, &op->ops[1], error);
     if(isnan(n1) || isnan(n2)) return NAN;
     if(isinf(n1) || isinf(n2)) return INFINITY;
     return n1 / n2;
 }
-calculated_number eval_nop(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_nop(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return eval_value(exp, &op->ops[0], error);
 }
-calculated_number eval_not(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_not(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return !is_true(eval_value(exp, &op->ops[0], error));
 }
-calculated_number eval_sign_plus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_sign_plus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     return eval_value(exp, &op->ops[0], error);
 }
-calculated_number eval_sign_minus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
+NETDATA_DOUBLE eval_sign_minus(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
     if(isnan(n1)) return NAN;
     if(isinf(n1)) return INFINITY;
     return -n1;
 }
-calculated_number eval_abs(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
-    calculated_number n1 = eval_value(exp, &op->ops[0], error);
+NETDATA_DOUBLE eval_abs(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+    NETDATA_DOUBLE n1 = eval_value(exp, &op->ops[0], error);
     if(isnan(n1)) return NAN;
     if(isinf(n1)) return INFINITY;
     return ABS(n1);
 }
-calculated_number eval_if_then_else(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+NETDATA_DOUBLE eval_if_then_else(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     if(is_true(eval_value(exp, &op->ops[0], error)))
         return eval_value(exp, &op->ops[1], error);
     else
@@ -310,7 +310,7 @@ static struct operator {
     char precedence;
     char parameters;
     char isfunction;
-    calculated_number (*eval)(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error);
+    NETDATA_DOUBLE (*eval)(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error);
 } operators[256] = {
         // this is a random access array
         // we always access it with a known EVAL_OPERATOR_X
@@ -341,13 +341,13 @@ static struct operator {
 
 #define eval_precedence(operator) (operators[(unsigned char)(operator)].precedence)
 
-static inline calculated_number eval_node(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
+static inline NETDATA_DOUBLE eval_node(EVAL_EXPRESSION *exp, EVAL_NODE *op, int *error) {
     if(unlikely(op->count != operators[op->operator].parameters)) {
         *error = EVAL_ERROR_INVALID_NUMBER_OF_OPERANDS;
         return 0;
     }
 
-    calculated_number n = operators[op->operator].eval(exp, op, error);
+    NETDATA_DOUBLE n = operators[op->operator].eval(exp, op, error);
 
     return n;
 }
@@ -360,7 +360,7 @@ static inline void print_parsed_as_variable(BUFFER *out, EVAL_VARIABLE *v, int *
     buffer_sprintf(out, "${%s}", v->name);
 }
 
-static inline void print_parsed_as_constant(BUFFER *out, calculated_number n) {
+static inline void print_parsed_as_constant(BUFFER *out, NETDATA_DOUBLE n) {
     if(unlikely(isnan(n))) {
         buffer_strcat(out, "nan");
         return;
@@ -372,7 +372,7 @@ static inline void print_parsed_as_constant(BUFFER *out, calculated_number n) {
     }
 
     char b[100+1], *s;
-    snprintfz(b, 100, CALCULATED_NUMBER_FORMAT, n);
+    snprintfz(b, 100, NETDATA_DOUBLE_FORMAT, n);
 
     s = &b[strlen(b) - 1];
     while(s > b && *s == '0') {
@@ -737,9 +737,9 @@ static inline int parse_variable(const char **string, char *buffer, size_t len)
     return 0;
 }
 
-static inline int parse_constant(const char **string, calculated_number *number) {
+static inline int parse_constant(const char **string, NETDATA_DOUBLE *number) {
     char *end = NULL;
-    calculated_number n = str2ld(*string, &end);
+    NETDATA_DOUBLE n = str2ndd(*string, &end);
     if(unlikely(!end || *string == end)) {
         *number = 0;
         return 0;
@@ -845,7 +845,7 @@ static inline void eval_node_set_value_to_node(EVAL_NODE *op, int pos, EVAL_NODE
     op->ops[pos].expression = value;
 }
 
-static inline void eval_node_set_value_to_constant(EVAL_NODE *op, int pos, calculated_number value) {
+static inline void eval_node_set_value_to_constant(EVAL_NODE *op, int pos, NETDATA_DOUBLE value) {
     if(pos >= op->count)
         fatal("Invalid request to set position %d of OPERAND that has only %d values", pos + 1, op->count + 1);
 
@@ -911,7 +911,7 @@ static inline EVAL_NODE *parse_next_operand_given_its_operator(const char **stri
 static inline EVAL_NODE *parse_one_full_operand(const char **string, int *error) {
     char variable_buffer[EVAL_MAX_VARIABLE_NAME_LENGTH + 1];
     EVAL_NODE *op1 = NULL;
-    calculated_number number;
+    NETDATA_DOUBLE number;
 
     *error = EVAL_ERROR_OK;
 
diff --git a/libnetdata/eval/eval.h b/libnetdata/eval/eval.h
index fc03d7c1f1..086d171aad 100644
--- a/libnetdata/eval/eval.h
+++ b/libnetdata/eval/eval.h
@@ -28,11 +28,11 @@ typedef struct eval_expression {
     const char *parsed_as;
 
     RRDCALC_STATUS *status;
-    calculated_number *myself;
+    NETDATA_DOUBLE *myself;
     time_t *after;
     time_t *before;
 
-    calculated_number result;
+    NETDATA_DOUBLE result;
 
     int error;
     BUFFER *error_msg;
@@ -83,6 +83,6 @@ extern const char *expression_strerror(int error);
 // 2 = FAILED, the error message is in: buffer_tostring(expression->error_msg)
 extern int expression_evaluate(EVAL_EXPRESSION *expression);
 
-extern int health_variable_lookup(const char *variable, uint32_t hash, struct rrdcalc *rc, calculated_number *result);
+extern int health_variable_lookup(const char *variable, uint32_t hash, struct rrdcalc *rc, NETDATA_DOUBLE *result);
 
 #endif //NETDATA_EVAL_H
diff --git a/libnetdata/inlined.h b/libnetdata/inlined.h
index a10448b699..5c265fc015 100644
--- a/libnetdata/inlined.h
+++ b/libnetdata/inlined.h
@@ -151,77 +151,6 @@ static inline long long str2ll(const char *s, char **endptr) {
         return n;
 }
 
-static inline long double str2ld(const char *s, char **endptr) {
-    int negative = 0;
-    const char *start = s;
-    unsigned long long integer_part = 0;
-    unsigned long decimal_part = 0;
-    size_t decimal_digits = 0;
-
-    switch(*s) {
-        case '-':
-            s++;
-            negative = 1;
-            break;
-
-        case '+':
-            s++;
-            break;
-
-        case 'n':
-            if(s[1] == 'a' && s[2] == 'n') {
-                if(endptr) *endptr = (char *)&s[3];
-                return NAN;
-            }
-            break;
-
-        case 'i':
-            if(s[1] == 'n' && s[2] == 'f') {
-                if(endptr) *endptr = (char *)&s[3];
-                return INFINITY;
-            }
-            break;
-
-        default:
-            break;
-    }
-
-    while (*s >= '0' && *s <= '9') {
-        integer_part = (integer_part * 10) + (*s - '0');
-        s++;
-    }
-
-    if(unlikely(*s == '.')) {
-        decimal_part = 0;
-        s++;
-
-        while (*s >= '0' && *s <= '9') {
-            decimal_part = (decimal_part * 10) + (*s - '0');
-            s++;
-            decimal_digits++;
-        }
-    }
-
-    if(unlikely(*s == 'e' || *s == 'E'))
-        return strtold(start, endptr);
-
-    if(unlikely(endptr))
-        *endptr = (char *)s;
-
-    if(unlikely(negative)) {
-        if(unlikely(decimal_digits))
-            return -((long double)integer_part + (long double)decimal_part / powl(10.0, decimal_digits));
-        else
-            return -((long double)integer_part);
-    }
-    else {
-        if(unlikely(decimal_digits))
-            return (long double)integer_part + (long double)decimal_part / powl(10.0, decimal_digits);
-        else
-            return (long double)integer_part;
-    }
-}
-
 static inline char *strncpyz(char *dst, const char *src, size_t n) {
     char *p = dst;
 
diff --git a/libnetdata/json/json.c b/libnetdata/json/json.c
index 1f391eeaae..e03556b506 100644
--- a/libnetdata/json/json.c
+++ b/libnetdata/json/json.c
@@ -111,7 +111,7 @@ int json_callback_print(JSON_ENTRY *e)
             break;
 
         case JSON_NUMBER:
-            sprintf(txt,"%Lf", e->data.number);
+            sprintf(txt, NETDATA_DOUBLE_FORMAT_AUTO, e->data.number);
             buffer_strcat(wb,txt);
 
             break;
@@ -168,7 +168,7 @@ static inline void json_jsonc_set_integer(JSON_ENTRY *e, char *key, int64_t valu
     e->type = JSON_NUMBER;
     memcpy(e->name, key, len);
     e->name[len] = 0;
-    e->data.number = value;
+    e->data.number = (NETDATA_DOUBLE)value;
 }
 
 /**
diff --git a/libnetdata/json/json.h b/libnetdata/json/json.h
index 99da6e07bf..b43f06b502 100644
--- a/libnetdata/json/json.h
+++ b/libnetdata/json/json.h
@@ -31,12 +31,12 @@ typedef struct json_entry {
     char name[JSON_NAME_LEN + 1];
     char fullname[JSON_FULLNAME_LEN + 1];
     union {
-        char *string;			// type == JSON_STRING
-        long double number;		// type == JSON_NUMBER
-        int boolean;			// type == JSON_BOOLEAN
-        size_t items;			// type == JSON_ARRAY
+        char *string;           // type == JSON_STRING
+        NETDATA_DOUBLE number;  // type == JSON_NUMBER
+        int boolean;            // type == JSON_BOOLEAN
+        size_t items;           // type == JSON_ARRAY
     } data;
-    size_t pos;					// the position of this item in its parent
+    size_t pos;                 // the position of this item in its parent
 
     char *original_string;
 
diff --git a/libnetdata/required_dummies.h b/libnetdata/required_dummies.h
index aa87e3964c..6d51bfedd4 100644
--- a/libnetdata/required_dummies.h
+++ b/libnetdata/required_dummies.h
@@ -23,7 +23,7 @@ void signals_unblock(void){};
 void signals_reset(void){};
 
 // callback required by eval()
-int health_variable_lookup(const char *variable, uint32_t hash, struct rrdcalc *rc, calculated_number *result)
+int health_variable_lookup(const char *variable, uint32_t hash, struct rrdcalc *rc, NETDATA_DOUBLE *result)
 {
     (void)variable;
     (void)hash;
diff --git a/libnetdata/statistical/statistical.c b/libnetdata/statistical/statistical.c
index ba8f0c45a8..ef9fe4e56b 100644
--- a/libnetdata/statistical/statistical.c
+++ b/libnetdata/statistical/statistical.c
@@ -2,28 +2,28 @@
 
 #include "../libnetdata.h"
 
-LONG_DOUBLE default_single_exponential_smoothing_alpha = 0.1;
+NETDATA_DOUBLE default_single_exponential_smoothing_alpha = 0.1;
 
-void log_series_to_stderr(LONG_DOUBLE *series, size_t entries, calculated_number result, const char *msg) {
-    const LONG_DOUBLE *value, *end = &series[entries];
+void log_series_to_stderr(NETDATA_DOUBLE *series, size_t entries, NETDATA_DOUBLE result, const char *msg) {
+    const NETDATA_DOUBLE *value, *end = &series[entries];
 
     fprintf(stderr, "%s of %zu entries [ ", msg, entries);
     for(value = series; value < end ;value++) {
         if(value != series) fprintf(stderr, ", ");
-        fprintf(stderr, "%" LONG_DOUBLE_MODIFIER, *value);
+        fprintf(stderr, "%" NETDATA_DOUBLE_MODIFIER, *value);
     }
-    fprintf(stderr, " ] results in " CALCULATED_NUMBER_FORMAT "\n", result);
+    fprintf(stderr, " ] results in " NETDATA_DOUBLE_FORMAT "\n", result);
 }
 
 // --------------------------------------------------------------------------------------------------------------------
 
-inline LONG_DOUBLE sum_and_count(const LONG_DOUBLE *series, size_t entries, size_t *count) {
-    const LONG_DOUBLE *value, *end = &series[entries];
-    LONG_DOUBLE sum = 0;
+inline NETDATA_DOUBLE sum_and_count(const NETDATA_DOUBLE *series, size_t entries, size_t *count) {
+    const NETDATA_DOUBLE *value, *end = &series[entries];
+    NETDATA_DOUBLE sum = 0;
     size_t c = 0;
 
     for(value = series; value < end ; value++) {
-        if(calculated_number_isnumber(*value)) {
+        if(netdata_double_isnumber(*value)) {
             sum += *value;
             c++;
         }
@@ -35,42 +35,42 @@ inline LONG_DOUBLE sum_and_count(const LONG_DOUBLE *series, size_t entries, size
     return sum;
 }
 
-inline LONG_DOUBLE sum(const LONG_DOUBLE *series, size_t entries) {
+inline NETDATA_DOUBLE sum(const NETDATA_DOUBLE *series, size_t entries) {
     return sum_and_count(series, entries, NULL);
 }
 
-inline LONG_DOUBLE average(const LONG_DOUBLE *series, size_t entries) {
+inline NETDATA_DOUBLE average(const NETDATA