SoW-2019-0002: Dynamic Snapshot

[lttng-tools.git] / src / common / filter / filter-ir.h

diff --git a/src/common/filter/filter-ir.h b/src/common/filter/filter-ir.h
new file mode 100644 (file)
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+++ b/src/common/filter/filter-ir.h
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+#ifndef _FILTER_IR_H
+#define _FILTER_IR_H
+
+/*
+ * filter-ir.h
+ *
+ * LTTng filter ir
+ *
+ * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include "filter-ast.h"
+
+enum ir_op_signedness {
+       IR_SIGN_UNKNOWN = 0,
+       IR_SIGNED,
+       IR_UNSIGNED,
+       IR_SIGN_DYN,            /* signedness determined dynamically */
+};
+
+enum ir_data_type {
+       IR_DATA_UNKNOWN = 0,
+       IR_DATA_STRING,
+       IR_DATA_NUMERIC,        /* numeric and boolean */
+       IR_DATA_FLOAT,
+       IR_DATA_FIELD_REF,
+       IR_DATA_GET_CONTEXT_REF,
+       IR_DATA_EXPRESSION,
+};
+
+enum ir_op_type {
+       IR_OP_UNKNOWN = 0,
+       IR_OP_ROOT,
+       IR_OP_LOAD,
+       IR_OP_UNARY,
+       IR_OP_BINARY,
+       IR_OP_LOGICAL,
+};
+
+/* left or right child */
+enum ir_side {
+       IR_SIDE_UNKNOWN = 0,
+       IR_LEFT,
+       IR_RIGHT,
+};
+
+enum ir_load_string_type {
+       /* Plain, no globbing at all: `hello world`. */
+       IR_LOAD_STRING_TYPE_PLAIN = 0,
+
+       /* Star at the end only: `hello *`. */
+       IR_LOAD_STRING_TYPE_GLOB_STAR_END,
+
+       /* At least one star, anywhere, but not at the end only: `he*wor*`. */
+       IR_LOAD_STRING_TYPE_GLOB_STAR,
+};
+
+struct ir_op_root {
+       struct ir_op *child;
+};
+
+enum ir_load_expression_type {
+       IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT,
+       IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT,
+       IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT,
+       IR_LOAD_EXPRESSION_GET_SYMBOL,
+       IR_LOAD_EXPRESSION_GET_INDEX,
+       IR_LOAD_EXPRESSION_LOAD_FIELD,
+};
+
+struct ir_load_expression_op {
+       struct ir_load_expression_op *next;
+       enum ir_load_expression_type type;
+       union {
+               char *symbol;
+               uint64_t index;
+       } u;
+};
+
+struct ir_load_expression {
+       struct ir_load_expression_op *child;
+};
+
+struct ir_op_load {
+       union {
+               struct {
+                       enum ir_load_string_type type;
+                       char *value;
+               } string;
+               int64_t num;
+               double flt;
+               char *ref;
+               struct ir_load_expression *expression;
+       } u;
+};
+
+struct ir_op_unary {
+       enum unary_op_type type;
+       struct ir_op *child;
+};
+
+struct ir_op_binary {
+       enum op_type type;
+       struct ir_op *left;
+       struct ir_op *right;
+};
+
+struct ir_op_logical {
+       enum op_type type;
+       struct ir_op *left;
+       struct ir_op *right;
+};
+
+struct ir_op {
+       /* common to all ops */
+       enum ir_op_type op;
+       enum ir_data_type data_type;
+       enum ir_op_signedness signedness;
+       enum ir_side side;
+
+       union {
+               struct ir_op_root root;
+               struct ir_op_load load;
+               struct ir_op_unary unary;
+               struct ir_op_binary binary;
+               struct ir_op_logical logical;
+       } u;
+};
+
+#endif /* _FILTER_IR_H */