--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/search_il_label.cc Fri Mar 02 17:59:20 2012 +0000
@@ -0,0 +1,97 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Search for a specific label in an IL list.
+ *
+ * when instantiated, must be given a pointer to one of the following
+ * - function_declaration_c
+ * - function_block_declaration_c
+ * - program_declaration_c
+ * - instruction_list_c
+ *
+ * which is where all calls to search for a specific label will look for said label.
+ */
+
+
+
+#include "absyntax_utils.hh"
+
+
+
+/* set to 1 to see debug info during execution */
+static int debug = 0;
+
+search_il_label_c::search_il_label_c(symbol_c *search_scope) {
+ this->search_scope = search_scope;
+ this->search_label = NULL;
+}
+
+search_il_label_c::~search_il_label_c(void) {
+}
+
+
+il_instruction_c *search_il_label_c::find_label(const char *label) {
+ return find_label(new identifier_c(label));
+}
+
+
+il_instruction_c *search_il_label_c::find_label(symbol_c *label) {
+ search_label = label;
+ il_instruction_c *res = (il_instruction_c *)search_scope->accept(*this);
+ search_label = NULL;
+ return res;
+}
+
+
+/****************************************/
+/* B.2 - Language IL (Instruction List) */
+/****************************************/
+/***********************************/
+/* B 2.1 Instructions and Operands */
+/***********************************/
+
+/* | label ':' [il_incomplete_instruction] eol_list */
+// SYM_REF2(il_instruction_c, label, il_instruction)
+// void *visit(instruction_list_c *symbol);
+void *search_il_label_c::visit(il_instruction_c *symbol) {
+// printf("search_il_label_c::visit(il_instruction_c *symbol): searching for %s\n", ((identifier_c *)search_label)->value);
+ if (NULL != symbol->label)
+ if (compare_identifiers(search_label, symbol->label) == 0)
+ return symbol;
+
+ return NULL;
+}
+
+
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/absyntax_utils/search_il_label.hh Fri Mar 02 17:59:20 2012 +0000
@@ -0,0 +1,95 @@
+/*
+ * matiec - a compiler for the programming languages defined in IEC 61131-3
+ *
+ * Copyright (C) 2012 Mario de Sousa (msousa@fe.up.pt)
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * Search for a specific label in an IL list.
+ *
+ * when instantiated, must be given a pointer to one of the following
+ * - function_declaration_c
+ * - function_block_declaration_c
+ * - program_declaration_c
+ * - instruction_list_c
+ *
+ * which is where all calls to search for a specific label will look for said label.
+ */
+
+
+
+#include "../absyntax_utils/absyntax_utils.hh"
+
+
+class search_il_label_c: public search_visitor_c {
+
+ private:
+ search_varfb_instance_type_c *search_varfb_instance_type;
+ symbol_c *search_scope;
+ symbol_c *search_label;
+
+ public:
+ search_il_label_c(symbol_c *search_scope);
+ virtual ~search_il_label_c(void);
+
+ il_instruction_c *find_label(const char *label);
+ il_instruction_c *find_label(symbol_c *label);
+
+
+ /****************************************/
+ /* B.2 - Language IL (Instruction List) */
+ /****************************************/
+ /***********************************/
+ /* B 2.1 Instructions and Operands */
+ /***********************************/
+// void *visit(instruction_list_c *symbol);
+ void *visit(il_instruction_c *symbol);
+// void *visit(il_simple_operation_c *symbol);
+// void *visit(il_function_call_c *symbol);
+// void *visit(il_expression_c *symbol);
+// void *visit(il_fb_call_c *symbol);
+// void *visit(il_formal_funct_call_c *symbol);
+// void *visit(il_operand_list_c *symbol);
+// void *visit(simple_instr_list_c *symbol);
+// void *visit(il_simple_instruction_c*symbol);
+// void *visit(il_param_list_c *symbol);
+// void *visit(il_param_assignment_c *symbol);
+// void *visit(il_param_out_assignment_c *symbol);
+
+
+}; // search_il_label_c
+
+
+
+
+
+
+
+