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-rw-r--r--tests/profile/test-eval.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/tests/profile/test-eval.c b/tests/profile/test-eval.c
new file mode 100644
index 000000000..144381cf0
--- /dev/null
+++ b/tests/profile/test-eval.c
@@ -0,0 +1,299 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+
+/*
+ * 1. build netdata (as normally)
+ * 2. cd profile/
+ * 3. compile with:
+ * gcc -O1 -ggdb -Wall -Wextra -I ../src/ -I ../ -o test-eval test-eval.c ../src/log.o ../src/eval.o ../src/common.o ../src/clocks.o ../src/web_buffer.o ../src/storage_number.o -pthread -lm
+ */
+
+#include "config.h"
+#include "libnetdata/libnetdata.h"
+#include "database/rrdcalc.h"
+
+void netdata_cleanup_and_exit(int ret) { exit(ret); }
+
+/*
+void indent(int level, int show) {
+ int i = level;
+ while(i--) printf(" | ");
+ if(show) printf(" \\_ ");
+ else printf(" \\_ ");
+}
+
+void print_node(EVAL_NODE *op, int level);
+
+void print_value(EVAL_VALUE *v, int level) {
+ indent(level, 0);
+
+ switch(v->type) {
+ case EVAL_VALUE_INVALID:
+ printf("value (NOP)\n");
+ break;
+
+ case EVAL_VALUE_NUMBER:
+ printf("value %Lf (NUMBER)\n", v->number);
+ break;
+
+ case EVAL_VALUE_EXPRESSION:
+ printf("value (SUB-EXPRESSION)\n");
+ print_node(v->expression, level+1);
+ break;
+
+ default:
+ printf("value (INVALID type %d)\n", v->type);
+ break;
+
+ }
+}
+
+void print_node(EVAL_NODE *op, int level) {
+
+// if(op->operator != EVAL_OPERATOR_NOP) {
+ indent(level, 1);
+ if(op->operator) printf("%c (node %d, precedence: %d)\n", op->operator, op->id, op->precedence);
+ else printf("NOP (node %d, precedence: %d)\n", op->id, op->precedence);
+// }
+
+ int i = op->count;
+ while(i--) print_value(&op->ops[i], level + 1);
+}
+
+calculated_number evaluate(EVAL_NODE *op, int depth);
+
+calculated_number evaluate_value(EVAL_VALUE *v, int depth) {
+ switch(v->type) {
+ case EVAL_VALUE_NUMBER:
+ return v->number;
+
+ case EVAL_VALUE_EXPRESSION:
+ return evaluate(v->expression, depth);
+
+ default:
+ fatal("I don't know how to handle EVAL_VALUE type %d", v->type);
+ }
+}
+
+void print_depth(int depth) {
+ static int count = 0;
+
+ printf("%d. ", ++count);
+ while(depth--) printf(" ");
+}
+
+calculated_number evaluate(EVAL_NODE *op, int depth) {
+ calculated_number n1, n2, r;
+
+ switch(op->operator) {
+ case EVAL_OPERATOR_SIGN_PLUS:
+ r = evaluate_value(&op->ops[0], depth);
+ break;
+
+ case EVAL_OPERATOR_SIGN_MINUS:
+ r = -evaluate_value(&op->ops[0], depth);
+ break;
+
+ case EVAL_OPERATOR_PLUS:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 + n2;
+ print_depth(depth);
+ printf("%Lf = %Lf + %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_MINUS:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 - n2;
+ print_depth(depth);
+ printf("%Lf = %Lf - %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_MULTIPLY:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 * n2;
+ print_depth(depth);
+ printf("%Lf = %Lf * %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_DIVIDE:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 / n2;
+ print_depth(depth);
+ printf("%Lf = %Lf / %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_NOT:
+ n1 = evaluate_value(&op->ops[0], depth);
+ r = !n1;
+ print_depth(depth);
+ printf("%Lf = NOT %Lf\n", r, n1);
+ break;
+
+ case EVAL_OPERATOR_AND:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 && n2;
+ print_depth(depth);
+ printf("%Lf = %Lf AND %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_OR:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 || n2;
+ print_depth(depth);
+ printf("%Lf = %Lf OR %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_GREATER_THAN_OR_EQUAL:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 >= n2;
+ print_depth(depth);
+ printf("%Lf = %Lf >= %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_LESS_THAN_OR_EQUAL:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 <= n2;
+ print_depth(depth);
+ printf("%Lf = %Lf <= %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_GREATER:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 > n2;
+ print_depth(depth);
+ printf("%Lf = %Lf > %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_LESS:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 < n2;
+ print_depth(depth);
+ printf("%Lf = %Lf < %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_NOT_EQUAL:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 != n2;
+ print_depth(depth);
+ printf("%Lf = %Lf <> %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_EQUAL:
+ if(op->count != 2)
+ fatal("Operator '%c' requires 2 values, but we have %d", op->operator, op->count);
+ n1 = evaluate_value(&op->ops[0], depth);
+ n2 = evaluate_value(&op->ops[1], depth);
+ r = n1 == n2;
+ print_depth(depth);
+ printf("%Lf = %Lf == %Lf\n", r, n1, n2);
+ break;
+
+ case EVAL_OPERATOR_EXPRESSION_OPEN:
+ printf("BEGIN SUB-EXPRESSION\n");
+ r = evaluate_value(&op->ops[0], depth + 1);
+ printf("END SUB-EXPRESSION\n");
+ break;
+
+ case EVAL_OPERATOR_NOP:
+ case EVAL_OPERATOR_VALUE:
+ r = evaluate_value(&op->ops[0], depth);
+ break;
+
+ default:
+ error("I don't know how to handle operator '%c'", op->operator);
+ r = 0;
+ break;
+ }
+
+ return r;
+}
+
+
+void print_expression(EVAL_NODE *op, const char *failed_at, int error) {
+ if(op) {
+ printf("expression tree:\n");
+ print_node(op, 0);
+
+ printf("\nevaluation steps:\n");
+ evaluate(op, 0);
+
+ int error;
+ calculated_number ret = expression_evaluate(op, &error);
+ printf("\ninternal evaluator:\nSTATUS: %d, RESULT = %Lf\n", error, ret);
+
+ expression_free(op);
+ }
+ else {
+ printf("error: %d, failed_at: '%s'\n", error, (failed_at)?failed_at:"<NONE>");
+ }
+}
+*/
+
+int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result) {
+ (void)variable;
+ (void)hash;
+ (void)rc;
+ (void)result;
+
+ return 0;
+}
+
+int main(int argc, char **argv) {
+ if(argc != 2) {
+ fprintf(stderr, "I need an epxression (enclose it in single-quotes (') as a single parameter)\n");
+ exit(1);
+ }
+
+ const char *failed_at = NULL;
+ int error;
+
+ EVAL_EXPRESSION *exp = expression_parse(argv[1], &failed_at, &error);
+ if(!exp)
+ printf("\nPARSING FAILED\nExpression: '%s'\nParsing stopped at: '%s'\nParsing error code: %d (%s)\n", argv[1], (failed_at)?((*failed_at)?failed_at:"<END OF EXPRESSION>"):"<NONE>", error, expression_strerror(error));
+
+ else {
+ printf("\nPARSING OK\nExpression: '%s'\nParsed as : '%s'\nParsing error code: %d (%s)\n", argv[1], exp->parsed_as, error, expression_strerror(error));
+
+ if(expression_evaluate(exp)) {
+ printf("\nEvaluates to: %Lf\n\n", exp->result);
+ }
+ else {
+ printf("\nEvaluation failed with code %d and message: %s\n\n", exp->error, buffer_tostring(exp->error_msg));
+ }
+ expression_free(exp);
+ }
+
+ return 0;
+}
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