Mercurial > botc / file comparison

comparison: src/parser.h

src/parser.h

changeset 73
1ee9b312dc18
child 74
007fbadfa7f9
equal deleted inserted replaced
72:03e4d9db3fd9 73:1ee9b312dc18
1 /*
2 Copyright (c) 2013-2014, Santeri Piippo
3 All rights reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
7
8 * Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 * Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14
15 * Neither the name of the <organization> nor the
16 names of its contributors may be used to endorse or promote products
17 derived from this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
20 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef BOTC_PARSER_H
32 #define BOTC_PARSER_H
33
34 #include <stdio.h>
35 #include "main.h"
36 #include "commands.h"
37 #include "object_writer.h"
38 #include "lexer_scanner.h"
39 #include "tokens.h"
40
41 #define MAX_FILESTACK 8
42 #define MAX_SCOPE 32
43 #define MAX_CASE 64
44
45 class lexer;
46 class script_variable;
47
48 // Operators
49 enum operator_e
50 {
51 OPER_ADD,
52 OPER_SUBTRACT,
53 OPER_MULTIPLY,
54 OPER_DIVIDE,
55 OPER_MODULUS,
56 OPER_ASSIGN,
57 OPER_ASSIGNADD,
58 OPER_ASSIGNSUB,
59 OPER_ASSIGNMUL,
60 OPER_ASSIGNDIV,
61 OPER_ASSIGNMOD, // -- 10
62 OPER_EQUALS,
63 OPER_NOTEQUALS,
64 OPER_LESSTHAN,
65 OPER_GREATERTHAN,
66 OPER_LESSTHANEQUALS,
67 OPER_GREATERTHANEQUALS,
68 OPER_LEFTSHIFT,
69 OPER_RIGHTSHIFT,
70 OPER_ASSIGNLEFTSHIFT,
71 OPER_ASSIGNRIGHTSHIFT, // -- 20
72 OPER_OR,
73 OPER_AND,
74 OPER_BITWISEOR,
75 OPER_BITWISEAND,
76 OPER_BITWISEEOR,
77 OPER_TERNARY,
78 OPER_STRLEN,
79 };
80
81 struct operator_info
82 {
83 operator_e opercode;
84 DATAHEADERS_e dataheader;
85 e_token token;
86 };
87
88 // Mark types
89 enum marktype_e
90 {
91 MARKTYPE_LABEL,
92 MARKTYPE_IF,
93 MARKTYPE_INTERNAL, // internal structures
94 };
95
96 // Block types
97 enum scopetype_e
98 {
99 SCOPETYPE_UNKNOWN,
100 SCOPETYPE_IF,
101 SCOPETYPE_WHILE,
102 SCOPETYPE_FOR,
103 SCOPETYPE_DO,
104 SCOPETYPE_SWITCH,
105 SCOPETYPE_ELSE,
106 };
107
108 // ============================================================================
109 // Meta-data about blocks
110 struct ScopeInfo
111 {
112 int mark1;
113 int mark2;
114 scopetype_e type;
115 data_buffer* buffer1;
116
117 // switch-related stuff
118 // Which case are we at?
119 short casecursor;
120
121 // Marks to case-blocks
122 int casemarks[MAX_CASE];
123
124 // Numbers of the case labels
125 int casenumbers[MAX_CASE];
126
127 // actual case blocks
128 data_buffer* casebuffers[MAX_CASE];
129
130 // What is the current buffer of the block?
131 data_buffer* recordbuffer;
132 };
133
134 // ============================================================================
135 struct constant_info
136 {
137 string name;
138 type_e type;
139 string val;
140 };
141
142 // ============================================================================
143 // The script reader reads the script, parses it and tells the object writer
144 // the bytecode it needs to write to file.
145 class botscript_parser
146 {
147 public:
148 // ====================================================================
149 // TODO: make private
150 FILE* fp[MAX_FILESTACK];
151 string filepath[MAX_FILESTACK];
152 int fc;
153
154 int pos[MAX_FILESTACK];
155 int curline[MAX_FILESTACK];
156 int curchar[MAX_FILESTACK];
157 ScopeInfo scopestack[MAX_SCOPE];
158 long savedpos[MAX_FILESTACK]; // filepointer cursor position
159 int commentmode;
160 long prevpos;
161 string prevtoken;
162
163 // ====================================================================
164 // METHODS
165 botscript_parser();
166 ~botscript_parser();
167 void parse_botscript (string file_name, object_writer* w);
168 data_buffer* ParseCommand (CommandDef* comm);
169 data_buffer* parse_expression (type_e reqtype);
170 data_buffer* ParseAssignment (script_variable* var);
171 int parse_operator (bool peek = false);
172 data_buffer* parse_expr_value (type_e reqtype);
173 string parse_float ();
174 void push_scope ();
175 data_buffer* parse_statement (object_writer* w);
176 void add_switch_case (object_writer* w, data_buffer* b);
177 void check_toplevel();
178 void check_not_toplevel();
179 bool token_is (e_token a);
180 string token_string();
181 string describe_position() const;
182
183 private:
184 lexer* m_lx;
185 };
186
187 constant_info* find_constant_by_name (string token);
188
189 #endif // BOTC_PARSER_H

Mercurial Repository: botc

mercurial