author | Mario de Sousa <msousa@fe.up.pt> |
Mon, 03 Dec 2012 14:06:49 +0000 | |
changeset 762 | a3d917474ae4 |
parent 596 | 4efb11e44065 |
child 810 | d9c48ad646f1 |
permissions | -rwxr-xr-x |
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/* |
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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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* Seperation of type specification and default value constructs |
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* (for e.g. simple_spec_init_c), into a type specificiation part, |
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* and a default value part. |
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*/ |
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#include "spec_init_separator.hh" |
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#include "../main.hh" // required for ERROR() and ERROR_MSG() macros. |
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//#define DEBUG |
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#ifdef DEBUG |
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#define TRACE(classname) printf("\n____%s____\n",classname); |
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#else |
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#define TRACE(classname) |
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#endif |
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spec_init_sperator_c *spec_init_sperator_c::get_class_instance(void) { |
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if (NULL == class_instance) |
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class_instance = new spec_init_sperator_c(); |
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if (NULL == class_instance) |
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ERROR; |
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return class_instance; |
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} |
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/* the only two public functions... */ |
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symbol_c *spec_init_sperator_c::get_spec(symbol_c *spec_init) { |
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search_what = search_spec; |
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return (symbol_c *)spec_init->accept(*get_class_instance()); |
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} |
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symbol_c *spec_init_sperator_c::get_init(symbol_c *spec_init) { |
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search_what = search_init; |
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return (symbol_c *)spec_init->accept(*get_class_instance()); |
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} |
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/*******************************************/ |
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/* B 1.1 - Letters, digits and identifiers */ |
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/*******************************************/ |
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// SYM_TOKEN(identifier_c) |
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void *spec_init_sperator_c::visit(identifier_c *symbol) { |
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TRACE("spec_init_sperator_c::identifier_c"); |
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switch (search_what) { |
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/* if we ever get called sith a simple identifier_c, then it must be a previously declared type... */ |
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case search_spec: return symbol; |
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case search_init: return NULL; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/********************************/ |
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/* B 1.3.3 - Derived data types */ |
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/********************************/ |
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/* simple_specification ASSIGN constant */ |
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void *spec_init_sperator_c::visit(simple_spec_init_c *symbol) { |
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TRACE("spec_init_sperator_c::simple_spec_init_c"); |
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switch (search_what) { |
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case search_spec: return symbol->simple_specification; |
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case search_init: return symbol->constant; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* subrange_specification ASSIGN signed_integer */ |
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void *spec_init_sperator_c::visit(subrange_spec_init_c *symbol) { |
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TRACE("spec_init_sperator_c::subrange_spec_init_c"); |
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switch (search_what) { |
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case search_spec: return symbol->subrange_specification->accept(*this); |
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case search_init: return symbol->signed_integer; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* integer_type_name '(' subrange')' */ |
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void *spec_init_sperator_c::visit(subrange_specification_c *symbol) { |
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TRACE("spec_init_sperator_c::subrange_specification_c"); |
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switch (search_what) { |
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case search_spec: return symbol->integer_type_name; |
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case search_init: return NULL; /* should never occur */ |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* array_specification [ASSIGN array_initialization} */ |
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/* array_initialization may be NULL ! */ |
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void *spec_init_sperator_c::visit(array_spec_init_c *symbol) { |
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TRACE("spec_init_sperator_c::array_spec_init_c"); |
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switch (search_what) { |
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case search_spec: return symbol->array_specification; |
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case search_init: return symbol->array_initialization; |
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} |
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return NULL; |
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} |
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/* enumerated_specification ASSIGN enumerated_value */ |
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void *spec_init_sperator_c::visit(enumerated_spec_init_c *symbol) { |
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TRACE("spec_init_sperator_c::enumerated_spec_init_c"); |
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switch (search_what) { |
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case search_spec: return symbol->enumerated_specification; |
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case search_init: return symbol->enumerated_value; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* structure_type_name ASSIGN structure_initialization */ |
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/* structure_initialization may be NULL ! */ |
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//SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization) |
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void *spec_init_sperator_c::visit(initialized_structure_c *symbol) { |
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TRACE("spec_init_sperator_c::initialized_structure_c"); |
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switch (search_what) { |
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case search_spec: return symbol->structure_type_name; |
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case search_init: return symbol->structure_initialization; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/******************************************/ |
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/* B 1.4.3 - Declaration & Initialisation */ |
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/******************************************/ |
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/* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */ |
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/* structure_initialization -> may be NULL ! */ |
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void *spec_init_sperator_c::visit(fb_name_decl_c *symbol) { |
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TRACE("spec_init_sperator_c::fb_name_decl_c"); |
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switch (search_what) { |
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case search_spec: return symbol->function_block_type_name; |
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case search_init: return symbol->structure_initialization; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* STRING '[' integer ']' |
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* STRING ASSIGN single_byte_character_string |
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* STRING '[' integer ']' ASSIGN single_byte_character_string |
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*/ |
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void *spec_init_sperator_c::visit(single_byte_string_spec_c *symbol) { |
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TRACE("spec_init_sperator_c::single_byte_string_spec_c"); |
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switch (search_what) { |
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case search_spec: return symbol->string_spec; |
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case search_init: return symbol->single_byte_character_string; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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/* WSTRING '[' integer ']' |
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* WSTRING ASSIGN double_byte_character_string |
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* WSTRING '[' integer ']' ASSIGN double_byte_character_string |
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*/ |
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void *spec_init_sperator_c::visit(double_byte_string_spec_c *symbol) { |
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TRACE("spec_init_sperator_c::double_byte_string_spec_c"); |
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switch (search_what) { |
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case search_spec: return symbol->string_spec; |
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case search_init: return symbol->double_byte_character_string; |
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} |
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ERROR; /* should never occur */ |
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return NULL; |
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} |
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spec_init_sperator_c *spec_init_sperator_c ::class_instance = NULL; |
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spec_init_sperator_c::search_what_t spec_init_sperator_c::search_what; |