|
1 /* |
|
2 * (c) 2003 Mario de Sousa |
|
3 * |
|
4 * Offered to the public under the terms of the GNU General Public License |
|
5 * as published by the Free Software Foundation; either version 2 of the |
|
6 * License, or (at your option) any later version. |
|
7 * |
|
8 * This program is distributed in the hope that it will be useful, but |
|
9 * WITHOUT ANY WARRANTY; without even the implied warranty of |
|
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
|
11 * Public License for more details. |
|
12 * |
|
13 * This code is made available on the understanding that it will not be |
|
14 * used in safety-critical situations without a full and competent review. |
|
15 */ |
|
16 |
|
17 /* |
|
18 * An IEC 61131-3 IL and ST compiler. |
|
19 * |
|
20 * Based on the |
|
21 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
|
22 * |
|
23 */ |
|
24 |
|
25 /* Determine the data type on which another data type is based on. |
|
26 * If a new default initial value is given, we DO NOT consider it a |
|
27 * new base class, and continue looking further! |
|
28 * |
|
29 * E.g. TYPE new_int_t : INT; END_TYPE; |
|
30 * TYPE new_int2_t : INT = 2; END_TYPE; |
|
31 * TYPE new_subr_t : INT (4..5); END_TYPE; |
|
32 * |
|
33 * new_int_t is really an INT!! |
|
34 * new_int2_t is also really an INT!! |
|
35 * new_subr_t is also really an INT!! |
|
36 */ |
|
37 #include "absyntax_utils.hh" |
|
38 |
|
39 #define ERROR error_exit(__FILE__,__LINE__) |
|
40 /* function defined in main.cc */ |
|
41 extern void error_exit(const char *file_name, int line_no); |
|
42 |
|
43 |
|
44 |
|
45 search_base_type_c::search_base_type_c(void) {current_type_name = NULL;} |
|
46 |
|
47 void *search_base_type_c::visit(identifier_c *type_name) { |
|
48 this->current_type_name = type_name; |
|
49 /* look up the type declaration... */ |
|
50 symbol_c *type_decl = type_symtable.find_value(type_name); |
|
51 if (type_decl == type_symtable.end_value()) |
|
52 /* Type declaration not found!! */ |
|
53 ERROR; |
|
54 |
|
55 return type_decl->accept(*this); |
|
56 } |
|
57 |
|
58 bool search_base_type_c::type_is_subrange(symbol_c* type_decl) { |
|
59 this->is_subrange = false; |
|
60 type_decl->accept(*this); |
|
61 return this->is_subrange; |
|
62 } |
|
63 |
|
64 bool search_base_type_c::type_is_enumerated(symbol_c* type_decl) { |
|
65 this->is_enumerated = false; |
|
66 type_decl->accept(*this); |
|
67 return this->is_enumerated; |
|
68 } |
|
69 |
|
70 /***********************************/ |
|
71 /* B 1.3.1 - Elementary Data Types */ |
|
72 /***********************************/ |
|
73 void *search_base_type_c::visit(time_type_name_c *symbol) {return (void *)symbol;} |
|
74 void *search_base_type_c::visit(bool_type_name_c *symbol) {return (void *)symbol;} |
|
75 void *search_base_type_c::visit(sint_type_name_c *symbol) {return (void *)symbol;} |
|
76 void *search_base_type_c::visit(int_type_name_c *symbol) {return (void *)symbol;} |
|
77 void *search_base_type_c::visit(dint_type_name_c *symbol) {return (void *)symbol;} |
|
78 void *search_base_type_c::visit(lint_type_name_c *symbol) {return (void *)symbol;} |
|
79 void *search_base_type_c::visit(usint_type_name_c *symbol) {return (void *)symbol;} |
|
80 void *search_base_type_c::visit(uint_type_name_c *symbol) {return (void *)symbol;} |
|
81 void *search_base_type_c::visit(udint_type_name_c *symbol) {return (void *)symbol;} |
|
82 void *search_base_type_c::visit(ulint_type_name_c *symbol) {return (void *)symbol;} |
|
83 void *search_base_type_c::visit(real_type_name_c *symbol) {return (void *)symbol;} |
|
84 void *search_base_type_c::visit(lreal_type_name_c *symbol) {return (void *)symbol;} |
|
85 void *search_base_type_c::visit(date_type_name_c *symbol) {return (void *)symbol;} |
|
86 void *search_base_type_c::visit(tod_type_name_c *symbol) {return (void *)symbol;} |
|
87 void *search_base_type_c::visit(dt_type_name_c *symbol) {return (void *)symbol;} |
|
88 void *search_base_type_c::visit(byte_type_name_c *symbol) {return (void *)symbol;} |
|
89 void *search_base_type_c::visit(word_type_name_c *symbol) {return (void *)symbol;} |
|
90 void *search_base_type_c::visit(dword_type_name_c *symbol) {return (void *)symbol;} |
|
91 void *search_base_type_c::visit(lword_type_name_c *symbol) {return (void *)symbol;} |
|
92 void *search_base_type_c::visit(string_type_name_c *symbol) {return (void *)symbol;} |
|
93 void *search_base_type_c::visit(wstring_type_name_c *symbol) {return (void *)symbol;} |
|
94 void *search_base_type_c::visit(constant_int_type_name_c *symbol) {return (void *)symbol;} |
|
95 void *search_base_type_c::visit(constant_real_type_name_c *symbol) {return (void *)symbol;} |
|
96 void *search_base_type_c::visit(direct_variable_type_name_c *symbol) {return (void *)symbol;} |
|
97 /******************************************************/ |
|
98 /* Extensions to the base standard as defined in */ |
|
99 /* "Safety Software Technical Specification, */ |
|
100 /* Part 1: Concepts and Function Blocks, */ |
|
101 /* Version 1.0 – Official Release" */ |
|
102 /* by PLCopen - Technical Committee 5 - 2006-01-31 */ |
|
103 /******************************************************/ |
|
104 void *search_base_type_c::visit(safebool_type_name_c *symbol) {return (void *)symbol;} |
|
105 |
|
106 /********************************/ |
|
107 /* B 1.3.3 - Derived data types */ |
|
108 /********************************/ |
|
109 /* simple_type_name ':' simple_spec_init */ |
|
110 void *search_base_type_c::visit(simple_type_declaration_c *symbol) { |
|
111 return symbol->simple_spec_init->accept(*this); |
|
112 } |
|
113 /* simple_specification ASSIGN constant */ |
|
114 void *search_base_type_c::visit(simple_spec_init_c *symbol) { |
|
115 return symbol->simple_specification->accept(*this); |
|
116 } |
|
117 |
|
118 /* subrange_type_name ':' subrange_spec_init */ |
|
119 void *search_base_type_c::visit(subrange_type_declaration_c *symbol) { |
|
120 return symbol->subrange_spec_init->accept(*this); |
|
121 } |
|
122 |
|
123 /* subrange_specification ASSIGN signed_integer */ |
|
124 void *search_base_type_c::visit(subrange_spec_init_c *symbol) { |
|
125 this->is_subrange = true; |
|
126 return symbol->subrange_specification->accept(*this); |
|
127 } |
|
128 |
|
129 /* integer_type_name '(' subrange')' */ |
|
130 void *search_base_type_c::visit(subrange_specification_c *symbol) { |
|
131 return symbol->integer_type_name->accept(*this); |
|
132 } |
|
133 |
|
134 /* signed_integer DOTDOT signed_integer */ |
|
135 void *search_base_type_c::visit(subrange_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
136 |
|
137 /* enumerated_type_name ':' enumerated_spec_init */ |
|
138 void *search_base_type_c::visit(enumerated_type_declaration_c *symbol) { |
|
139 this->current_type_name = symbol->enumerated_type_name; |
|
140 return symbol->enumerated_spec_init->accept(*this); |
|
141 } |
|
142 |
|
143 /* enumerated_specification ASSIGN enumerated_value */ |
|
144 void *search_base_type_c::visit(enumerated_spec_init_c *symbol) { |
|
145 this->is_enumerated = true; |
|
146 return symbol->enumerated_specification->accept(*this); |
|
147 } |
|
148 |
|
149 /* helper symbol for enumerated_specification->enumerated_spec_init */ |
|
150 /* enumerated_value_list ',' enumerated_value */ |
|
151 void *search_base_type_c::visit(enumerated_value_list_c *symbol) { |
|
152 if (NULL == this->current_type_name) ERROR; |
|
153 return (void *)this->current_type_name; |
|
154 } |
|
155 |
|
156 /* enumerated_type_name '#' identifier */ |
|
157 // SYM_REF2(enumerated_value_c, type, value) |
|
158 void *search_base_type_c::visit(enumerated_value_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
159 |
|
160 /* identifier ':' array_spec_init */ |
|
161 void *search_base_type_c::visit(array_type_declaration_c *symbol) { |
|
162 this->current_type_name = symbol->identifier; |
|
163 return symbol->array_spec_init->accept(*this); |
|
164 } |
|
165 |
|
166 /* array_specification [ASSIGN array_initialization} */ |
|
167 /* array_initialization may be NULL ! */ |
|
168 void *search_base_type_c::visit(array_spec_init_c *symbol) { |
|
169 return symbol->array_specification->accept(*this); |
|
170 } |
|
171 |
|
172 /* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */ |
|
173 void *search_base_type_c::visit(array_specification_c *symbol) { |
|
174 if (NULL == this->current_type_name) ERROR; |
|
175 return symbol->non_generic_type_name->accept(*this); |
|
176 } |
|
177 |
|
178 /* helper symbol for array_specification */ |
|
179 /* array_subrange_list ',' subrange */ |
|
180 void *search_base_type_c::visit(array_subrange_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
181 |
|
182 /* array_initialization: '[' array_initial_elements_list ']' */ |
|
183 /* helper symbol for array_initialization */ |
|
184 /* array_initial_elements_list ',' array_initial_elements */ |
|
185 void *search_base_type_c::visit(array_initial_elements_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
186 |
|
187 /* integer '(' [array_initial_element] ')' */ |
|
188 /* array_initial_element may be NULL ! */ |
|
189 void *search_base_type_c::visit(array_initial_elements_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
190 |
|
191 /* structure_type_name ':' structure_specification */ |
|
192 /* NOTE: structure_specification will point to either a |
|
193 * initialized_structure_c |
|
194 * OR A |
|
195 * structure_element_declaration_list_c |
|
196 */ |
|
197 void *search_base_type_c::visit(structure_type_declaration_c *symbol) { |
|
198 this->current_type_name = symbol->structure_type_name; |
|
199 return symbol->structure_specification->accept(*this); |
|
200 } |
|
201 |
|
202 /* structure_type_name ASSIGN structure_initialization */ |
|
203 /* structure_initialization may be NULL ! */ |
|
204 void *search_base_type_c::visit(initialized_structure_c *symbol) { |
|
205 return symbol->structure_type_name->accept(*this); |
|
206 } |
|
207 |
|
208 /* helper symbol for structure_declaration */ |
|
209 /* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */ |
|
210 /* structure_element_declaration_list structure_element_declaration ';' */ |
|
211 void *search_base_type_c::visit(structure_element_declaration_list_c *symbol) { |
|
212 if (NULL == this->current_type_name) ERROR; |
|
213 return (void *)symbol; |
|
214 } |
|
215 |
|
216 /* structure_element_name ':' *_spec_init */ |
|
217 void *search_base_type_c::visit(structure_element_declaration_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
218 |
|
219 /* helper symbol for structure_initialization */ |
|
220 /* structure_initialization: '(' structure_element_initialization_list ')' */ |
|
221 /* structure_element_initialization_list ',' structure_element_initialization */ |
|
222 void *search_base_type_c::visit(structure_element_initialization_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
223 |
|
224 /* structure_element_name ASSIGN value */ |
|
225 void *search_base_type_c::visit(structure_element_initialization_c *symbol) {ERROR; return NULL;} /* should never get called... */ |
|
226 |
|
227 /* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ |
|
228 /* |
|
229 SYM_REF4(string_type_declaration_c, string_type_name, |
|
230 elementary_string_type_name, |
|
231 string_type_declaration_size, |
|
232 string_type_declaration_init) // may be == NULL! |
|
233 */ |
|
234 void *search_base_type_c::visit(string_type_declaration_c *symbol) {return symbol;} |
|
235 |