--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/parser.h Sat Jan 11 22:36:31 2014 +0200
@@ -0,0 +1,189 @@
+/*
+ Copyright (c) 2013-2014, Santeri Piippo
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ * Neither the name of the <organization> nor the
+ names of its contributors may be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef BOTC_PARSER_H
+#define BOTC_PARSER_H
+
+#include <stdio.h>
+#include "main.h"
+#include "commands.h"
+#include "object_writer.h"
+#include "lexer_scanner.h"
+#include "tokens.h"
+
+#define MAX_FILESTACK 8
+#define MAX_SCOPE 32
+#define MAX_CASE 64
+
+class lexer;
+class script_variable;
+
+// Operators
+enum operator_e
+{
+ OPER_ADD,
+ OPER_SUBTRACT,
+ OPER_MULTIPLY,
+ OPER_DIVIDE,
+ OPER_MODULUS,
+ OPER_ASSIGN,
+ OPER_ASSIGNADD,
+ OPER_ASSIGNSUB,
+ OPER_ASSIGNMUL,
+ OPER_ASSIGNDIV,
+ OPER_ASSIGNMOD, // -- 10
+ OPER_EQUALS,
+ OPER_NOTEQUALS,
+ OPER_LESSTHAN,
+ OPER_GREATERTHAN,
+ OPER_LESSTHANEQUALS,
+ OPER_GREATERTHANEQUALS,
+ OPER_LEFTSHIFT,
+ OPER_RIGHTSHIFT,
+ OPER_ASSIGNLEFTSHIFT,
+ OPER_ASSIGNRIGHTSHIFT, // -- 20
+ OPER_OR,
+ OPER_AND,
+ OPER_BITWISEOR,
+ OPER_BITWISEAND,
+ OPER_BITWISEEOR,
+ OPER_TERNARY,
+ OPER_STRLEN,
+};
+
+struct operator_info
+{
+ operator_e opercode;
+ DATAHEADERS_e dataheader;
+ e_token token;
+};
+
+// Mark types
+enum marktype_e
+{
+ MARKTYPE_LABEL,
+ MARKTYPE_IF,
+ MARKTYPE_INTERNAL, // internal structures
+};
+
+// Block types
+enum scopetype_e
+{
+ SCOPETYPE_UNKNOWN,
+ SCOPETYPE_IF,
+ SCOPETYPE_WHILE,
+ SCOPETYPE_FOR,
+ SCOPETYPE_DO,
+ SCOPETYPE_SWITCH,
+ SCOPETYPE_ELSE,
+};
+
+// ============================================================================
+// Meta-data about blocks
+struct ScopeInfo
+{
+ int mark1;
+ int mark2;
+ scopetype_e type;
+ data_buffer* buffer1;
+
+ // switch-related stuff
+ // Which case are we at?
+ short casecursor;
+
+ // Marks to case-blocks
+ int casemarks[MAX_CASE];
+
+ // Numbers of the case labels
+ int casenumbers[MAX_CASE];
+
+ // actual case blocks
+ data_buffer* casebuffers[MAX_CASE];
+
+ // What is the current buffer of the block?
+ data_buffer* recordbuffer;
+};
+
+// ============================================================================
+struct constant_info
+{
+ string name;
+ type_e type;
+ string val;
+};
+
+// ============================================================================
+// The script reader reads the script, parses it and tells the object writer
+// the bytecode it needs to write to file.
+class botscript_parser
+{
+ public:
+ // ====================================================================
+ // TODO: make private
+ FILE* fp[MAX_FILESTACK];
+ string filepath[MAX_FILESTACK];
+ int fc;
+
+ int pos[MAX_FILESTACK];
+ int curline[MAX_FILESTACK];
+ int curchar[MAX_FILESTACK];
+ ScopeInfo scopestack[MAX_SCOPE];
+ long savedpos[MAX_FILESTACK]; // filepointer cursor position
+ int commentmode;
+ long prevpos;
+ string prevtoken;
+
+ // ====================================================================
+ // METHODS
+ botscript_parser();
+ ~botscript_parser();
+ void parse_botscript (string file_name, object_writer* w);
+ data_buffer* ParseCommand (CommandDef* comm);
+ data_buffer* parse_expression (type_e reqtype);
+ data_buffer* ParseAssignment (script_variable* var);
+ int parse_operator (bool peek = false);
+ data_buffer* parse_expr_value (type_e reqtype);
+ string parse_float ();
+ void push_scope ();
+ data_buffer* parse_statement (object_writer* w);
+ void add_switch_case (object_writer* w, data_buffer* b);
+ void check_toplevel();
+ void check_not_toplevel();
+ bool token_is (e_token a);
+ string token_string();
+ string describe_position() const;
+
+ private:
+ lexer* m_lx;
+};
+
+constant_info* find_constant_by_name (string token);
+
+#endif // BOTC_PARSER_H