src/lib/lttng-ctl/filter/filter-ir.h

   1 #ifndef _FILTER_IR_H
   2 #define _FILTER_IR_H
   3
   4 /*
   5  * filter-ir.h
   6  *
   7  * LTTng filter ir
   8  *
   9  * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * This library is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU Lesser General Public License, version 2.1 only,
  13  * as published by the Free Software Foundation.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this library; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23  */
  24
  25 #include "filter-ast.h"
  26
  27 enum ir_op_signedness {
  28         IR_SIGN_UNKNOWN = 0,
  29         IR_SIGNED,
  30         IR_UNSIGNED,
  31         IR_SIGN_DYN,            /* signedness determined dynamically */
  32 };
  33
  34 enum ir_data_type {
  35         IR_DATA_UNKNOWN = 0,
  36         IR_DATA_STRING,
  37         IR_DATA_NUMERIC,        /* numeric and boolean */
  38         IR_DATA_FLOAT,
  39         IR_DATA_FIELD_REF,
  40         IR_DATA_GET_CONTEXT_REF,
  41 };
  42
  43 enum ir_op_type {
  44         IR_OP_UNKNOWN = 0,
  45         IR_OP_ROOT,
  46         IR_OP_LOAD,
  47         IR_OP_UNARY,
  48         IR_OP_BINARY,
  49         IR_OP_LOGICAL,
  50 };
  51
  52 /* left or right child */
  53 enum ir_side {
  54         IR_SIDE_UNKNOWN = 0,
  55         IR_LEFT,
  56         IR_RIGHT,
  57 };
  58
  59 enum ir_load_string_type {
  60         /* Plain, no globbing at all: `hello world`. */
  61         IR_LOAD_STRING_TYPE_PLAIN = 0,
  62
  63         /* Star at the end only: `hello *`. */
  64         IR_LOAD_STRING_TYPE_GLOB_STAR_END,
  65
  66         /* At least one star, anywhere, but not at the end only: `he*wor*`. */
  67         IR_LOAD_STRING_TYPE_GLOB_STAR,
  68 };
  69
  70 struct ir_op_root {
  71         struct ir_op *child;
  72 };
  73
  74 struct ir_op_load {
  75         union {
  76                 struct {
  77                         enum ir_load_string_type type;
  78                         char *value;
  79                 } string;
  80                 int64_t num;
  81                 double flt;
  82                 char *ref;
  83         } u;
  84 };
  85
  86 struct ir_op_unary {
  87         enum unary_op_type type;
  88         struct ir_op *child;
  89 };
  90
  91 struct ir_op_binary {
  92         enum op_type type;
  93         struct ir_op *left;
  94         struct ir_op *right;
  95 };
  96
  97 struct ir_op_logical {
  98         enum op_type type;
  99         struct ir_op *left;
 100         struct ir_op *right;
 101 };
 102
 103 struct ir_op {
 104         /* common to all ops */
 105         enum ir_op_type op;
 106         enum ir_data_type data_type;
 107         enum ir_op_signedness signedness;
 108         enum ir_side side;
 109
 110         union {
 111                 struct ir_op_root root;
 112                 struct ir_op_load load;
 113                 struct ir_op_unary unary;
 114                 struct ir_op_binary binary;
 115                 struct ir_op_logical logical;
 116         } u;
 117 };
 118
 119 #endif /* _FILTER_IR_H */