-/*
- * event-expr.c
- *
- * Linux Trace Toolkit Control Library
- *
- * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com>
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <assert.h>
-#include <stddef.h>
-
-#include <common/error.h>
-#include <common/macros.h>
-#include <lttng/event-expr-internal.h>
-
-enum lttng_event_expr_type lttng_event_expr_get_type(
- const struct lttng_event_expr *expr)
-{
- enum lttng_event_expr_type type;
-
- if (!expr) {
- type = LTTNG_EVENT_EXPR_TYPE_INVALID;
- goto end;
- }
-
- type = expr->type;
-
-end:
- return type;
-}
-
-static
-struct lttng_event_expr *create_empty_expr(enum lttng_event_expr_type type,
- size_t size)
-{
- struct lttng_event_expr *expr;
-
- expr = zmalloc(size);
- if (!expr) {
- goto end;
- }
-
- expr->type = type;
-
-end:
- return expr;
-}
-
-static
-struct lttng_event_expr_field *create_field_event_expr(
- enum lttng_event_expr_type type,
- const char *name)
-{
- struct lttng_event_expr_field *expr =
- container_of(
- create_empty_expr(type, sizeof(*expr)),
- struct lttng_event_expr_field, parent);
-
- if (!expr) {
- goto error;
- }
-
- assert(name);
- expr->name = strdup(name);
- if (!expr->name) {
- goto error;
- }
-
- goto end;
-
-error:
- if (expr) {
- lttng_event_expr_destroy(&expr->parent);
- }
- expr = NULL;
-
-end:
- return expr;
-}
-
-struct lttng_event_expr *lttng_event_expr_event_payload_field_create(
- const char *field_name)
-{
- struct lttng_event_expr *expr = NULL;
-
- if (!field_name) {
- goto end;
- }
-
- expr = &create_field_event_expr(
- LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD,
- field_name)->parent;
-
-end:
- return expr;
-}
-
-struct lttng_event_expr *lttng_event_expr_channel_context_field_create(
- const char *field_name)
-{
- struct lttng_event_expr *expr = NULL;
-
- if (!field_name) {
- goto end;
- }
-
- expr = &create_field_event_expr(
- LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD,
- field_name)->parent;
-
-end:
- return expr;
-}
-
-struct lttng_event_expr *lttng_event_expr_app_specific_context_field_create(
- const char *provider_name, const char *type_name)
-{
- struct lttng_event_expr_app_specific_context_field *expr = NULL;
- struct lttng_event_expr *ret_parent_expr;
-
- if (!type_name || !provider_name) {
- goto error;
- }
-
- expr = container_of(create_empty_expr(
- LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD,
- sizeof(*expr)),
- struct lttng_event_expr_app_specific_context_field,
- parent);
- if (!expr) {
- goto error;
- }
-
- expr->provider_name = strdup(provider_name);
- if (!expr->provider_name) {
- goto error;
- }
-
- expr->type_name = strdup(type_name);
- if (!expr->type_name) {
- goto error;
- }
-
- ret_parent_expr = &expr->parent;
- goto end;
-
-error:
- if (expr) {
- lttng_event_expr_destroy(&expr->parent);
- }
- ret_parent_expr = NULL;
-
-end:
- return ret_parent_expr;
-}
-
-struct lttng_event_expr *lttng_event_expr_array_field_element_create(
- struct lttng_event_expr *array_field_expr,
- unsigned int index)
-{
- struct lttng_event_expr_array_field_element *expr = NULL;
- struct lttng_event_expr *ret_parent_expr;
-
- /* The parent array field expression must be an l-value */
- if (!array_field_expr ||
- !lttng_event_expr_is_lvalue(array_field_expr)) {
- goto error;
- }
-
- expr = container_of(create_empty_expr(
- LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT,
- sizeof(*expr)),
- struct lttng_event_expr_array_field_element,
- parent);
- if (!expr) {
- goto error;
- }
-
- expr->array_field_expr = array_field_expr;
- expr->index = index;
- ret_parent_expr = &expr->parent;
- goto end;
-
-error:
- if (expr) {
- lttng_event_expr_destroy(&expr->parent);
- }
- ret_parent_expr = NULL;
-
-end:
- return ret_parent_expr;
-}
-
-const char *lttng_event_expr_event_payload_field_get_name(
- const struct lttng_event_expr *expr)
-{
- const char *ret = NULL;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD) {
- goto end;
- }
-
- ret = container_of(expr,
- const struct lttng_event_expr_field, parent)->name;
-
-end:
- return ret;
-}
-
-const char *lttng_event_expr_channel_context_field_get_name(
- const struct lttng_event_expr *expr)
-{
- const char *ret = NULL;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD) {
- goto end;
- }
-
- ret = container_of(expr,
- const struct lttng_event_expr_field, parent)->name;
-
-end:
- return ret;
-}
-
-const char *lttng_event_expr_app_specific_context_field_get_provider_name(
- const struct lttng_event_expr *expr)
-{
- const char *ret = NULL;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) {
- goto end;
- }
-
- ret = container_of(expr,
- const struct lttng_event_expr_app_specific_context_field,
- parent)->provider_name;
-
-end:
- return ret;
-}
-
-const char *lttng_event_expr_app_specific_context_field_get_type_name(
- const struct lttng_event_expr *expr)
-{
- const char *ret = NULL;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) {
- goto end;
- }
-
- ret = container_of(expr,
- const struct lttng_event_expr_app_specific_context_field,
- parent)->type_name;
-
-end:
- return ret;
-}
-
-const struct lttng_event_expr *
-lttng_event_expr_array_field_element_get_parent_expr(
- const struct lttng_event_expr *expr)
-{
- const struct lttng_event_expr *ret = NULL;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT) {
- goto end;
- }
-
- ret = container_of(expr,
- const struct lttng_event_expr_array_field_element,
- parent)->array_field_expr;
-
-end:
- return ret;
-}
-
-enum lttng_event_expr_status lttng_event_expr_array_field_element_get_index(
- const struct lttng_event_expr *expr, unsigned int *index)
-{
- enum lttng_event_expr_status ret = LTTNG_EVENT_EXPR_STATUS_OK;
-
- if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT ||
- !index) {
- ret = LTTNG_EVENT_EXPR_STATUS_INVALID;
- goto end;
- }
-
- *index = container_of(expr,
- const struct lttng_event_expr_array_field_element,
- parent)->index;
-
-end:
- return ret;
-}
-
-bool lttng_event_expr_is_equal(const struct lttng_event_expr *expr_a,
- const struct lttng_event_expr *expr_b)
-{
- bool is_equal = true;
-
- if (!expr_a && !expr_b) {
- /* Both `NULL`: equal */
- goto end;
- }
-
- if (!expr_a || !expr_b) {
- /* Only one `NULL`: not equal */
- goto not_equal;
- }
-
- if (expr_a->type != expr_b->type) {
- /* Different types: not equal */
- goto not_equal;
- }
-
- switch (expr_a->type) {
- case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD:
- case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD:
- {
- const struct lttng_event_expr_field *field_expr_a =
- container_of(expr_a,
- const struct lttng_event_expr_field,
- parent);
- const struct lttng_event_expr_field *field_expr_b =
- container_of(expr_b,
- const struct lttng_event_expr_field,
- parent);
-
- if (strcmp(field_expr_a->name, field_expr_b->name) != 0) {
- goto not_equal;
- }
-
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD:
- {
- const struct lttng_event_expr_app_specific_context_field *field_expr_a =
- container_of(expr_a,
- const struct lttng_event_expr_app_specific_context_field,
- parent);
- const struct lttng_event_expr_app_specific_context_field *field_expr_b =
- container_of(expr_b,
- const struct lttng_event_expr_app_specific_context_field,
- parent);
-
- if (strcmp(field_expr_a->provider_name,
- field_expr_b->provider_name) != 0) {
- goto not_equal;
- }
-
- if (strcmp(field_expr_a->type_name,
- field_expr_b->type_name) != 0) {
- goto not_equal;
- }
-
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT:
- {
- const struct lttng_event_expr_array_field_element *elem_expr_a =
- container_of(expr_a,
- const struct lttng_event_expr_array_field_element,
- parent);
- const struct lttng_event_expr_array_field_element *elem_expr_b =
- container_of(expr_b,
- const struct lttng_event_expr_array_field_element,
- parent);
-
- if (!lttng_event_expr_is_equal(elem_expr_a->array_field_expr,
- elem_expr_b->array_field_expr)) {
- goto not_equal;
- }
-
- if (elem_expr_a->index != elem_expr_b->index) {
- goto not_equal;
- }
-
- break;
- }
- default:
- break;
- }
-
- goto end;
-
-not_equal:
- is_equal = false;
-
-end:
- return is_equal;
-}
-
-void lttng_event_expr_destroy(struct lttng_event_expr *expr)
-{
- if (!expr) {
- goto end;
- }
-
- switch (expr->type) {
- case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD:
- case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD:
- {
- struct lttng_event_expr_field *field_expr =
- container_of(expr,
- struct lttng_event_expr_field, parent);
-
- free(field_expr->name);
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD:
- {
- struct lttng_event_expr_app_specific_context_field *field_expr =
- container_of(expr,
- struct lttng_event_expr_app_specific_context_field,
- parent);
-
- free(field_expr->provider_name);
- free(field_expr->type_name);
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT:
- {
- struct lttng_event_expr_array_field_element *elem_expr =
- container_of(expr,
- struct lttng_event_expr_array_field_element,
- parent);
-
- lttng_event_expr_destroy(elem_expr->array_field_expr);
- break;
- }
- default:
- break;
- }
-
- free(expr);
-
-end:
- return;
-}
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