comparison: src/parser.h
src/parser.h
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| 1 /* | |
| 2 Copyright 2012-2014 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 | |
| 7 are met: | |
| 8 | |
| 9 1. Redistributions of source code must retain the above copyright | |
| 10 notice, this list of conditions and the following disclaimer. | |
| 11 2. 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 3. The name of the author may not be used to endorse or promote products | |
| 15 derived from this software without specific prior written permission. | |
| 16 | |
| 17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 20 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 21 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 22 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef BOTC_PARSER_H | |
| 30 #define BOTC_PARSER_H | |
| 31 | |
| 32 #include <stdio.h> | |
| 33 #include "main.h" | |
| 34 #include "commands.h" | |
| 35 #include "lexer_scanner.h" | |
| 36 #include "tokens.h" | |
| 37 | |
| 38 #define MAX_SCOPE 32 | |
| 39 #define MAX_CASE 64 | |
| 40 #define MAX_MARKS 512 // TODO: get rid of this | |
| 41 | |
| 42 class data_buffer; | |
| 43 class lexer; | |
| 44 class script_variable; | |
| 45 | |
| 46 struct undefined_label | |
| 47 { | |
| 48 string name; | |
| 49 byte_mark* target; | |
| 50 }; | |
| 51 | |
| 52 // ============================================================================ | |
| 53 // Operators | |
| 54 // | |
| 55 enum operator_e | |
| 56 { | |
| 57 OPER_ADD, | |
| 58 OPER_SUBTRACT, | |
| 59 OPER_MULTIPLY, | |
| 60 OPER_DIVIDE, | |
| 61 OPER_MODULUS, | |
| 62 OPER_ASSIGN, | |
| 63 OPER_ASSIGNADD, | |
| 64 OPER_ASSIGNSUB, | |
| 65 OPER_ASSIGNMUL, | |
| 66 OPER_ASSIGNDIV, | |
| 67 OPER_ASSIGNMOD, // -- 10 | |
| 68 OPER_EQUALS, | |
| 69 OPER_NOTEQUALS, | |
| 70 OPER_LESSTHAN, | |
| 71 OPER_GREATERTHAN, | |
| 72 OPER_LESSTHANEQUALS, | |
| 73 OPER_GREATERTHANEQUALS, | |
| 74 OPER_LEFTSHIFT, | |
| 75 OPER_RIGHTSHIFT, | |
| 76 OPER_ASSIGNLEFTSHIFT, | |
| 77 OPER_ASSIGNRIGHTSHIFT, // -- 20 | |
| 78 OPER_OR, | |
| 79 OPER_AND, | |
| 80 OPER_BITWISEOR, | |
| 81 OPER_BITWISEAND, | |
| 82 OPER_BITWISEEOR, | |
| 83 OPER_TERNARY, | |
| 84 OPER_STRLEN, | |
| 85 }; | |
| 86 | |
| 87 // ============================================================================ | |
| 88 // | |
| 89 struct operator_info | |
| 90 { | |
| 91 operator_e opercode; | |
| 92 e_data_header dataheader; | |
| 93 e_token token; | |
| 94 }; | |
| 95 | |
| 96 // ============================================================================ | |
| 97 // Mark types | |
| 98 // | |
| 99 enum marktype_e | |
| 100 { | |
| 101 e_label_mark, | |
| 102 e_if_mark, | |
| 103 e_internal_mark, // internal structures | |
| 104 }; | |
| 105 | |
| 106 // ============================================================================ | |
| 107 // Scope types | |
| 108 // | |
| 109 enum scopetype_e | |
| 110 { | |
| 111 e_unknown_scope, | |
| 112 e_if_scope, | |
| 113 e_while_scope, | |
| 114 e_for_scope, | |
| 115 e_do_scope, | |
| 116 e_switch_scope, | |
| 117 e_else_scope, | |
| 118 }; | |
| 119 | |
| 120 // ============================================================================ | |
| 121 // Meta-data about scopes | |
| 122 // | |
| 123 struct ScopeInfo | |
| 124 { | |
| 125 byte_mark* mark1; | |
| 126 byte_mark* mark2; | |
| 127 scopetype_e type; | |
| 128 data_buffer* buffer1; | |
| 129 | |
| 130 // switch-related stuff | |
| 131 // Which case are we at? | |
| 132 int casecursor; | |
| 133 | |
| 134 // Marks to case-blocks | |
| 135 byte_mark* casemarks[MAX_CASE]; | |
| 136 | |
| 137 // Numbers of the case labels | |
| 138 int casenumbers[MAX_CASE]; | |
| 139 | |
| 140 // actual case blocks | |
| 141 data_buffer* casebuffers[MAX_CASE]; | |
| 142 | |
| 143 // What is the current buffer of the block? | |
| 144 data_buffer* recordbuffer; | |
| 145 }; | |
| 146 | |
| 147 // ============================================================================ | |
| 148 // | |
| 149 struct constant_info | |
| 150 { | |
| 151 string name; | |
| 152 type_e type; | |
| 153 string val; | |
| 154 }; | |
| 155 | |
| 156 // ============================================================================ | |
| 157 // | |
| 158 class botscript_parser | |
| 159 { | |
| 160 public: | |
| 161 // ==================================================================== | |
| 162 // METHODS | |
| 163 botscript_parser(); | |
| 164 ~botscript_parser(); | |
| 165 void parse_botscript (string file_name); | |
| 166 data_buffer* parse_command (command_info* comm); | |
| 167 data_buffer* parse_expression (type_e reqtype); | |
| 168 data_buffer* parse_assignment (script_variable* var); | |
| 169 int parse_operator (bool peek = false); | |
| 170 data_buffer* parse_expr_value (type_e reqtype); | |
| 171 string parse_float(); | |
| 172 void push_scope(); | |
| 173 data_buffer* parse_statement(); | |
| 174 void add_switch_case (data_buffer* b); | |
| 175 void check_toplevel(); | |
| 176 void check_not_toplevel(); | |
| 177 bool token_is (e_token a); | |
| 178 string token_string(); | |
| 179 string describe_position() const; | |
| 180 void write_to_file (string outfile); | |
| 181 | |
| 182 inline int get_num_events() const | |
| 183 { | |
| 184 return m_num_events; | |
| 185 } | |
| 186 | |
| 187 inline int get_num_states() const | |
| 188 { | |
| 189 return m_num_states; | |
| 190 } | |
| 191 | |
| 192 private: | |
| 193 // The lexer we're using. | |
| 194 lexer* m_lx; | |
| 195 | |
| 196 // The main buffer - the contents of this is what we | |
| 197 // write to file after parsing is complete | |
| 198 data_buffer* m_main_buffer; | |
| 199 | |
| 200 // onenter buffer - the contents of the onenter{} block | |
| 201 // is buffered here and is merged further at the end of state | |
| 202 data_buffer* m_on_enter_buffer; | |
| 203 | |
| 204 // Mainloop buffer - the contents of the mainloop{} block | |
| 205 // is buffered here and is merged further at the end of state | |
| 206 data_buffer* m_main_loop_buffer; | |
| 207 | |
| 208 // Switch buffer - switch case data is recorded to this | |
| 209 // buffer initially, instead of into main buffer. | |
| 210 data_buffer* m_switch_buffer; | |
| 211 | |
| 212 int m_num_states; | |
| 213 int m_num_events; | |
| 214 parsermode_e m_current_mode; | |
| 215 string m_current_state; | |
| 216 bool m_state_spawn_defined; | |
| 217 bool m_got_main_loop; | |
| 218 int m_scope_cursor; | |
| 219 data_buffer* m_if_expression; | |
| 220 bool m_can_else; | |
| 221 list<undefined_label> m_undefined_labels; | |
| 222 list<constant_info> m_constants; | |
| 223 | |
| 224 // How many bytes have we written to file? | |
| 225 int m_num_written_bytes; | |
| 226 | |
| 227 // Scope data | |
| 228 // TODO: make a list | |
| 229 ScopeInfo m_scope_stack[MAX_SCOPE]; | |
| 230 | |
| 231 data_buffer* buffer(); | |
| 232 constant_info* find_constant (const string& tok); | |
| 233 void parse_state_block(); | |
| 234 void parse_event_block(); | |
| 235 void parse_mainloop(); | |
| 236 void parse_on_enter_exit(); | |
| 237 void parse_variable_declaration(); | |
| 238 void parse_goto(); | |
| 239 void parse_if(); | |
| 240 void parse_else(); | |
| 241 void parse_while_block(); | |
| 242 void parse_for_block(); | |
| 243 void parse_do_block(); | |
| 244 void parse_switch_block(); | |
| 245 void parse_switch_case(); | |
| 246 void parse_switch_default(); | |
| 247 void parse_break(); | |
| 248 void parse_continue(); | |
| 249 void parse_block_end(); | |
| 250 void parse_const(); | |
| 251 void parse_label(); | |
| 252 void parse_eventdef(); | |
| 253 void parse_funcdef(); | |
| 254 void write_member_buffers(); | |
| 255 void write_string_table(); | |
| 256 }; | |
| 257 | |
| 258 constant_info* find_constant (const string& tok); | |
| 259 | |
| 260 #endif // BOTC_PARSER_H |
