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Diffstat (limited to 'tests/profile/test-eval.c')
-rw-r--r-- | tests/profile/test-eval.c | 299 |
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 0000000..144381c --- /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; +} |