--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage4/generate_c/search_constant_type.cc Wed Oct 24 17:39:51 2007 +0200
@@ -0,0 +1,161 @@
+/*
+ * (c) 2003 Mario de Sousa
+ *
+ * Offered to the public under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2 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.
+ *
+ * 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 IL and ST compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+
+/* Determine the data type of a specific constant or variable.
+ * A reference to the relevant type definition is returned.
+ *
+ * For example:
+ * 22 -> returns reference to a int_type_name_c object.
+ * 22.2 -> returns reference to a real_type_name_c object.
+ * LREAL#22.2 -> returns reference to a lreal_type_name_c object.
+ * etc...
+ */
+class search_constant_type_c: public search_visitor_c {
+
+ public:
+/**********************/
+/* B.1.3 - Data types */
+/**********************/
+/***********************************/
+/* B 1.3.1 - Elementary Data Types */
+/***********************************/
+ static real_type_name_c real_type_name;
+ static sint_type_name_c sint_type_name;
+ static lint_type_name_c lint_type_name;
+ static dint_type_name_c dint_type_name;
+ static date_type_name_c date_type_name;
+ static dword_type_name_c dword_type_name;
+ static dt_type_name_c dt_type_name;
+ static tod_type_name_c tod_type_name;
+ static udint_type_name_c udint_type_name;
+ static word_type_name_c word_type_name;
+ static wstring_type_name_c wstring_type_name;
+ static string_type_name_c string_type_name;
+ static lword_type_name_c lword_type_name;
+ static uint_type_name_c uint_type_name;
+ static lreal_type_name_c lreal_type_name;
+ static byte_type_name_c byte_type_name;
+ static usint_type_name_c usint_type_name;
+ static ulint_type_name_c ulint_type_name;
+ static bool_type_name_c bool_type_name;
+ static time_type_name_c time_type_name;
+ static int_type_name_c int_type_name;
+
+ static constant_real_type_name_c constant_real_type_name;
+ static constant_int_type_name_c constant_int_type_name;
+
+ public:
+ symbol_c *get_type(symbol_c *constant) {
+ return (symbol_c *)constant->accept(*this);
+ }
+
+ public:
+/*********************/
+/* B 1.2 - Constants */
+/*********************/
+
+/******************************/
+/* B 1.2.1 - Numeric Literals */
+/******************************/
+ void *visit(real_c *symbol) {return (void *)&constant_real_type_name;}
+ void *visit(integer_c *symbol) {return (void *)&constant_int_type_name;}
+ void *visit(binary_integer_c *symbol) {return (void *)&constant_int_type_name;}
+ void *visit(octal_integer_c *symbol) {return (void *)&constant_int_type_name;}
+ void *visit(hex_integer_c *symbol) {return (void *)&constant_int_type_name;}
+
+ void *visit(numeric_literal_c *symbol)
+ {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
+ void *visit(integer_literal_c *symbol)
+ {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
+ void *visit(real_literal_c *symbol)
+ {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
+ void *visit(bit_string_literal_c *symbol)
+ {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
+ void *visit(boolean_literal_c *symbol)
+ {return (void *)((symbol->type!=NULL)?symbol->type:symbol->value->accept(*this));}
+
+/*******************************/
+/* B.1.2.2 Character Strings */
+/*******************************/
+ void *visit(double_byte_character_string_c *symbol) {return (void *)&wstring_type_name;}
+ void *visit(single_byte_character_string_c *symbol) {return (void *)&string_type_name;}
+
+/***************************/
+/* B 1.2.3 - Time Literals */
+/***************************/
+/************************/
+/* B 1.2.3.1 - Duration */
+/************************/
+ void *visit(neg_time_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(duration_c *symbol) {return (void *)&time_type_name;}
+ void *visit(fixed_point_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(days_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(hours_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(minutes_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(seconds_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(milliseconds_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+
+/************************************/
+/* B 1.2.3.2 - Time of day and Date */
+/************************************/
+ void *visit(time_of_day_c *symbol) {return (void *)&tod_type_name;}
+ void *visit(daytime_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(date_c *symbol) {return (void *)&date_type_name;}
+ void *visit(date_literal_c *symbol) {ERROR; return NULL;} /* this member function should never be called. */
+ void *visit(date_and_time_c *symbol) {return (void *)&dt_type_name;}
+};
+
+
+real_type_name_c search_constant_type_c::real_type_name;
+sint_type_name_c search_constant_type_c::sint_type_name;
+lint_type_name_c search_constant_type_c::lint_type_name;
+dint_type_name_c search_constant_type_c::dint_type_name;
+date_type_name_c search_constant_type_c::date_type_name;
+dword_type_name_c search_constant_type_c::dword_type_name;
+dt_type_name_c search_constant_type_c::dt_type_name;
+tod_type_name_c search_constant_type_c::tod_type_name;
+udint_type_name_c search_constant_type_c::udint_type_name;
+word_type_name_c search_constant_type_c::word_type_name;
+wstring_type_name_c search_constant_type_c::wstring_type_name;
+string_type_name_c search_constant_type_c::string_type_name;
+lword_type_name_c search_constant_type_c::lword_type_name;
+uint_type_name_c search_constant_type_c::uint_type_name;
+lreal_type_name_c search_constant_type_c::lreal_type_name;
+byte_type_name_c search_constant_type_c::byte_type_name;
+usint_type_name_c search_constant_type_c::usint_type_name;
+ulint_type_name_c search_constant_type_c::ulint_type_name;
+bool_type_name_c search_constant_type_c::bool_type_name;
+time_type_name_c search_constant_type_c::time_type_name;
+int_type_name_c search_constant_type_c::int_type_name;
+
+constant_real_type_name_c search_constant_type_c::constant_real_type_name;
+constant_int_type_name_c search_constant_type_c::constant_int_type_name;
+
+
+
+
+
+