author | Manuele Conti <conti.ma@alice.it> |
Sat, 21 Apr 2012 17:42:07 +0200 | |
changeset 527 | 1d83209aabfe |
parent 449 | 3c6225521059 |
permissions | -rwxr-xr-x |
181 | 1 |
/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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/* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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/* |
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* Function call parameter iterator. |
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* It will iterate through the non-formal parameters of a function call |
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* (i.e. function calls using the foo(<param1>, <param2>, ...) syntax). |
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* and/or search through the formal parameters of a function call |
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* (i.e. function calls using the foo(<name1> = <param1>, <name2> = <param2>, ...) syntax). |
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* |
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* Calls to function blocks and programs are also supported. |
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* |
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* Note that calls to next_nf() will only iterate through non-formal parameters, |
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* calls to next_f() will only iterate through formal parameters, |
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* and calls to search_f() will only serach through formal parameters. |
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*/ |
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#include "../absyntax/visitor.hh" |
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class function_call_param_iterator_c : public null_visitor_c { |
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private: |
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void *search_list(list_c *list); |
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void *handle_parameter_assignment(symbol_c *variable_name, symbol_c *expression) ; |
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public: |
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/* start off at the first parameter once again... */ |
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void reset(void); |
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/* initialise the iterator object. |
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* We must be given a reference to the function/program/function block call |
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* that will be analysed... |
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*/ |
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function_call_param_iterator_c(symbol_c *f_call); |
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/* Skip to the next formal parameter. After object creation, |
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* the object references on parameter _before_ the first, so |
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* this function must be called once to get the object to |
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* reference the first parameter... |
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* |
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* Returns the paramater name to which a value is being passed! |
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* You can determine the value being passed by calling |
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* function_call_param_iterator_c::search_f() |
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*/ |
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symbol_c *next_f(void); |
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/* Skip to the next non-formal parameter. After object creation, |
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* the object references on parameter _before_ the first, so |
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* this function must be called once to get the object to |
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* reference the first parameter... |
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* |
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* Returns whatever is being passed to the parameter! |
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*/ |
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symbol_c *next_nf(void); |
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/* Search for the value passed to the parameter named <param_name>... */ |
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symbol_c *search_f(symbol_c *param_name); |
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symbol_c *search_f(const char *param_name); |
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/* Returns the value being passed to the current parameter. */ |
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symbol_c *get_current_value(void); |
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/* A type to specify how the current parameter was assigned. |
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* param_name := var -> assign_in |
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* param_name => var -> assign_out |
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* -> assign_none (used when handling non formal calls, when no assignment type is used) |
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*/ |
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typedef enum {assign_in, assign_out, assign_none} assign_direction_t ; |
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/* Returns the assignment direction of the current parameter. */ |
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assign_direction_t get_assign_direction(void); |
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/* a pointer to the function call |
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* (or function block or program call!) |
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*/ |
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symbol_c *f_call; |
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int iterate_f_next_param, iterate_nf_next_param, param_count; |
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identifier_c *search_param_name; |
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symbol_c *current_value; |
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assign_direction_t current_assign_direction; |
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/* Which operation of the class was called: |
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* - iterate to the next non-formal parameter. |
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* - iterate to the next formal parameter. |
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* - search a formal parameter, |
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*/ |
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typedef enum {iterate_nf_op, iterate_f_op, search_f_op} operation_t; |
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operation_t current_operation; |
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private: |
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/********************************/ |
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/* B 1.7 Configuration elements */ |
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/********************************/ |
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/* |
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CONFIGURATION configuration_name |
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optional_global_var_declarations |
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(resource_declaration_list | single_resource_declaration) |
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optional_access_declarations |
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optional_instance_specific_initializations |
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END_CONFIGURATION |
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*/ |
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/* |
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SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused) |
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*/ |
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/* helper symbol for configuration_declaration */ |
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/* |
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SYM_LIST(resource_declaration_list_c) |
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*/ |
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/* |
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RESOURCE resource_name ON resource_type_name |
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optional_global_var_declarations |
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single_resource_declaration |
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END_RESOURCE |
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*/ |
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/* |
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SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration) |
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*/ |
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/* task_configuration_list program_configuration_list */ |
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/* |
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SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list) |
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*/ |
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/* helper symbol for single_resource_declaration */ |
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/* |
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SYM_LIST(task_configuration_list_c) |
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*/ |
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/* helper symbol for single_resource_declaration */ |
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/* |
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SYM_LIST(program_configuration_list_c) |
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*/ |
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/* helper symbol for |
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* - access_path |
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* - instance_specific_init |
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*/ |
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/* |
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176 |
SYM_LIST(any_fb_name_list_c) |
|
177 |
*/ |
|
178 |
||
179 |
/* [resource_name '.'] global_var_name ['.' structure_element_name] */ |
|
180 |
/* |
|
181 |
SYM_REF4(global_var_reference_c, resource_name, global_var_name, structure_element_name, unused) |
|
182 |
*/ |
|
183 |
||
184 |
/* prev_declared_program_name '.' symbolic_variable */ |
|
185 |
/* |
|
186 |
SYM_REF2(program_output_reference_c, program_name, symbolic_variable) |
|
187 |
*/ |
|
188 |
||
189 |
/* TASK task_name task_initialization */ |
|
190 |
/* |
|
191 |
SYM_REF2(task_configuration_c, task_name, task_initialization) |
|
192 |
*/ |
|
193 |
||
194 |
/* '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */ |
|
195 |
/* |
|
196 |
SYM_REF4(task_initialization_c, single_data_source, interval_data_source, priority_data_source, unused) |
|
197 |
*/ |
|
198 |
||
199 |
/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */ |
|
200 |
// SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused) |
|
201 |
void *visit(program_configuration_c *symbol); |
|
202 |
||
203 |
/* prog_conf_elements ',' prog_conf_element */ |
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204 |
// SYM_LIST(prog_conf_elements_c) |
|
205 |
void *visit(prog_conf_elements_c *symbol); |
|
206 |
||
207 |
/* fb_name WITH task_name */ |
|
208 |
/* |
|
209 |
SYM_REF2(fb_task_c, fb_name, task_name) |
|
210 |
*/ |
|
211 |
||
212 |
/* any_symbolic_variable ASSIGN prog_data_source */ |
|
213 |
// SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source) |
|
214 |
void *visit(prog_cnxn_assign_c *symbol); |
|
215 |
||
216 |
/* any_symbolic_variable SENDTO data_sink */ |
|
217 |
// SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, prog_data_source) |
|
218 |
void *visit(prog_cnxn_sendto_c *symbol); |
|
219 |
||
220 |
/* VAR_CONFIG instance_specific_init_list END_VAR */ |
|
221 |
/* |
|
222 |
SYM_REF2(instance_specific_initializations_c, instance_specific_init_list, unused) |
|
223 |
*/ |
|
224 |
||
225 |
/* helper symbol for instance_specific_initializations */ |
|
226 |
/* |
|
227 |
SYM_LIST(instance_specific_init_list_c) |
|
228 |
*/ |
|
229 |
||
230 |
/* resource_name '.' program_name '.' {fb_name '.'} |
|
231 |
((variable_name [location] ':' located_var_spec_init) | (fb_name ':' fb_initialization)) |
|
232 |
*/ |
|
233 |
/* |
|
234 |
SYM_REF6(instance_specific_init_c, resource_name, program_name, any_fb_name_list, variable_name, location, initialization) |
|
235 |
*/ |
|
236 |
||
237 |
/* helper symbol for instance_specific_init */ |
|
238 |
/* function_block_type_name ':=' structure_initialization */ |
|
239 |
/* |
|
240 |
SYM_REF2(fb_initialization_c, function_block_type_name, structure_initialization) |
|
241 |
*/ |
|
242 |
||
243 |
||
244 |
/****************************************/ |
|
245 |
/* B.2 - Language IL (Instruction List) */ |
|
246 |
/****************************************/ |
|
247 |
/***********************************/ |
|
248 |
/* B 2.1 Instructions and Operands */ |
|
249 |
/***********************************/ |
|
250 |
||
251 |
/* | function_name [il_operand_list] */ |
|
252 |
// SYM_REF2(il_function_call_c, function_name, il_operand_list) |
|
253 |
void *visit(il_function_call_c *symbol); |
|
254 |
||
255 |
||
256 |
/* | function_name '(' eol_list [il_param_list] ')' */ |
|
257 |
// SYM_REF2(il_formal_funct_call_c, function_name, il_param_list) |
|
258 |
void *visit(il_formal_funct_call_c *symbol); |
|
259 |
||
260 |
||
261 |
/* il_call_operator prev_declared_fb_name |
|
262 |
* | il_call_operator prev_declared_fb_name '(' ')' |
|
263 |
* | il_call_operator prev_declared_fb_name '(' eol_list ')' |
|
264 |
* | il_call_operator prev_declared_fb_name '(' il_operand_list ')' |
|
265 |
* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')' |
|
266 |
*/ |
|
267 |
// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list) |
|
268 |
void *visit(il_fb_call_c *symbol); |
|
269 |
||
270 |
||
271 |
||
272 |
/* | il_operand_list ',' il_operand */ |
|
273 |
// SYM_LIST(il_operand_list_c) |
|
274 |
void *visit(il_operand_list_c *symbol); |
|
275 |
||
276 |
||
277 |
/* | il_initial_param_list il_param_instruction */ |
|
278 |
// SYM_LIST(il_param_list_c) |
|
279 |
void *visit(il_param_list_c *symbol); |
|
280 |
||
281 |
/* il_assign_operator il_operand |
|
282 |
* | il_assign_operator '(' eol_list simple_instr_list ')' |
|
283 |
*/ |
|
284 |
// SYM_REF4(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list, unused) |
|
285 |
void *visit(il_param_assignment_c *symbol); |
|
286 |
||
287 |
/* il_assign_out_operator variable */ |
|
288 |
// SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable); |
|
289 |
void *visit(il_param_out_assignment_c *symbol); |
|
290 |
||
291 |
||
292 |
/*******************/ |
|
293 |
/* B 2.2 Operators */ |
|
294 |
/*******************/ |
|
202
da1a8186f86f
Initial (very rough) version of semantic checker (stage3)
Catarina Boucinha <ccb@fe.up.pt>
parents:
181
diff
changeset
|
295 |
/* any_identifier ASSIGN */ |
da1a8186f86f
Initial (very rough) version of semantic checker (stage3)
Catarina Boucinha <ccb@fe.up.pt>
parents:
181
diff
changeset
|
296 |
// SYM_REF1(il_assign_operator_c, variable_name) |
da1a8186f86f
Initial (very rough) version of semantic checker (stage3)
Catarina Boucinha <ccb@fe.up.pt>
parents:
181
diff
changeset
|
297 |
void *visit(il_assign_operator_c *symbol); |
da1a8186f86f
Initial (very rough) version of semantic checker (stage3)
Catarina Boucinha <ccb@fe.up.pt>
parents:
181
diff
changeset
|
298 |
|
181 | 299 |
/*| [NOT] any_identifier SENDTO */ |
300 |
// SYM_REF2(il_assign_out_operator_c, option, variable_name) |
|
301 |
void *visit(il_assign_out_operator_c *symbol); |
|
302 |
||
303 |
||
304 |
||
305 |
||
306 |
/***************************************/ |
|
307 |
/* B.3 - Language ST (Structured Text) */ |
|
308 |
/***************************************/ |
|
309 |
/***********************/ |
|
310 |
/* B 3.1 - Expressions */ |
|
311 |
/***********************/ |
|
312 |
||
313 |
/* |
|
314 |
SYM_REF2(function_invocation_c, function_name, parameter_assignment_list) |
|
315 |
*/ |
|
316 |
void *visit(function_invocation_c *symbol); |
|
317 |
||
318 |
||
319 |
/********************/ |
|
320 |
/* B 3.2 Statements */ |
|
321 |
/********************/ |
|
322 |
||
323 |
/*********************************/ |
|
324 |
/* B 3.2.1 Assignment Statements */ |
|
325 |
/*********************************/ |
|
326 |
/* |
|
327 |
SYM_REF2(assignment_statement_c, l_exp, r_exp) |
|
328 |
*/ |
|
329 |
||
330 |
/*****************************************/ |
|
331 |
/* B 3.2.2 Subprogram Control Statements */ |
|
332 |
/*****************************************/ |
|
333 |
/* RETURN */ |
|
334 |
// SYM_REF0(return_statement_c) |
|
335 |
||
336 |
||
337 |
/* fb_name '(' [param_assignment_list] ')' */ |
|
338 |
/* param_assignment_list -> may be NULL ! */ |
|
339 |
// SYM_REF2(fb_invocation_c, fb_name, param_assignment_list) |
|
340 |
void *visit(fb_invocation_c *symbol); |
|
341 |
||
342 |
/* helper symbol for fb_invocation */ |
|
343 |
/* param_assignment_list ',' param_assignment */ |
|
344 |
// SYM_LIST(param_assignment_list_c) |
|
345 |
void *visit(param_assignment_list_c *symbol); |
|
346 |
||
347 |
/* variable_name ASSIGN expression */ |
|
348 |
// SYM_REF2(input_variable_param_assignment_c, variable_name, expression) |
|
349 |
void *visit(input_variable_param_assignment_c *symbol); |
|
350 |
||
351 |
/* [NOT] variable_name '=>' variable */ |
|
352 |
// SYM_REF4(output_variable_param_assignment_c, not_param, variable_name, variable, unused) |
|
353 |
void *visit(output_variable_param_assignment_c *symbol); |
|
354 |
||
355 |
/* helper CLASS for output_variable_param_assignment */ |
|
356 |
// SYM_REF0(not_paramassign_c) |
|
357 |
// TODO... ??? |
|
358 |
||
359 |
}; // function_call_param_iterator_c |
|
360 |
||
361 |
||
362 |
||
363 |