author | Mario de Sousa <msousa@fe.up.pt> |
Sat, 14 Apr 2012 16:53:35 +0100 | |
changeset 506 | 2b4e69c7ff8b |
parent 350 | 2c3c4dc34979 |
child 596 | 4efb11e44065 |
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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* A generic symbol table that allows duplicate values. |
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* |
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* This is used to create a symbol table of previously defined |
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* functions. Duplicate are allowed since the standard permits function\ |
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* overloading in the standard library. |
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*/ |
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#include <iostream> |
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#include "symtable.hh" |
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/* A macro for printing out internal parser errors... */ |
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#define ERROR error_exit(__FILE__,__LINE__) |
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/* function defined in main.cc */ |
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extern void error_exit(const char *file_name, int line_no); |
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/* clear all entries... */ |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::reset(void) { |
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_base.clear(); |
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} |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::insert(const char *identifier_str, value_t new_value) { |
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// std::cout << "store_identifier(" << identifier_str << "): \n"; |
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std::pair<const char *, value_t> new_element(identifier_str, new_value); |
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/* iterator res = */ _base.insert(new_element); |
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} |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::insert(const symbol_c *symbol, value_t new_value) { |
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const token_c *name = dynamic_cast<const token_c *>(symbol); |
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if (name == NULL) |
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ERROR; |
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insert(name->value, new_value); |
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} |
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#if 0 |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::insert_noduplicate(const char *identifier_str, value_t new_value) { |
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if (find_value(identifier_str) != null_value) |
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/* already present in the set! */ |
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ERROR; |
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// std::cout << "store_identifier(" << identifier_str << "): \n"; |
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std::pair<const char *, value_t> new_element(identifier_str, new_value); |
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/* iterator res = */ _base.insert(new_element); |
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} |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::insert_noduplicate(const symbol_c *symbol, value_t new_value) { |
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const token_c *name = dynamic_cast<const token_c *>(symbol); |
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if (name == NULL) |
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ERROR; |
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insert_noduplicate(name->value, new_value); |
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} |
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#endif |
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/* Determine how many entries are associated to key identifier_str */ |
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/* returns: |
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* 0: if no entry is found |
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* 1: if 1 entry is found |
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* 2: if more than 1 entry is found |
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*/ |
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template<typename value_type, value_type null_value> |
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int dsymtable_c<value_type, null_value>::multiplicity(const char *identifier_str) { |
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iterator lower = _base.lower_bound(identifier_str); |
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if (lower == _base.end()) return 0; |
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iterator upper = _base.upper_bound(identifier_str); |
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iterator second = lower; |
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second++; |
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if (second == upper) return 1; |
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return 2; |
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} |
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/* returns null_value if not found! */ |
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template<typename value_type, value_type null_value> |
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value_type dsymtable_c<value_type, null_value>::find_value(const char *identifier_str) { |
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iterator i = _base.find(identifier_str); |
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if (i == _base.end()) |
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return null_value; |
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else |
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return i->second; |
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} |
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template<typename value_type, value_type null_value> |
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const char * dsymtable_c<value_type, null_value>::symbol_to_string(const symbol_c *symbol) { |
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const token_c *name = dynamic_cast<const token_c *>(symbol); |
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if (name == NULL) |
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ERROR; |
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return name->value; |
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} |
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/* debuging function... */ |
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template<typename value_type, value_type null_value> |
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void dsymtable_c<value_type, null_value>::print(void) { |
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for(iterator i = _base.begin(); |
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i != _base.end(); |
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i++) |
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std::cout << i->second << ":" << i->first << "\n"; |
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std::cout << "=====================\n"; |
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} |
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