comparison: src/parser.h
src/parser.h
- changeset 119
- bdf8d46c145f
- child 133
- dbbdb870c835
equal
deleted
inserted
replaced
| 118:e3361cf7cbf4 | 119:bdf8d46c145f |
|---|---|
| 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 "lexerScanner.h" | |
| 36 #include "tokens.h" | |
| 37 | |
| 38 class DataBuffer; | |
| 39 class Lexer; | |
| 40 class Variable; | |
| 41 | |
| 42 // ============================================================================ | |
| 43 // Mark types | |
| 44 // | |
| 45 named_enum MarkType | |
| 46 { | |
| 47 MARK_Label, | |
| 48 MARK_If, | |
| 49 MARK_Internal, // internal structures | |
| 50 }; | |
| 51 | |
| 52 // ============================================================================ | |
| 53 // Scope types | |
| 54 // | |
| 55 named_enum ScopeType | |
| 56 { | |
| 57 SCOPE_Unknown, | |
| 58 SCOPE_If, | |
| 59 SCOPE_While, | |
| 60 SCOPE_For, | |
| 61 SCOPE_Do, | |
| 62 SCOPE_Switch, | |
| 63 SCOPE_Else, | |
| 64 }; | |
| 65 | |
| 66 named_enum AssignmentOperator | |
| 67 { | |
| 68 ASSIGNOP_Assign, | |
| 69 ASSIGNOP_Add, | |
| 70 ASSIGNOP_Subtract, | |
| 71 ASSIGNOP_Multiply, | |
| 72 ASSIGNOP_Divide, | |
| 73 ASSIGNOP_Modulus, | |
| 74 ASSIGNOP_Increase, | |
| 75 ASSIGNOP_Decrease, | |
| 76 }; | |
| 77 | |
| 78 named_enum Writability | |
| 79 { | |
| 80 WRITE_Mutable, // normal read-many-write-many variable | |
| 81 WRITE_Const, // write-once const variable | |
| 82 WRITE_Constexpr, // const variable whose value is known to compiler | |
| 83 }; | |
| 84 | |
| 85 // ============================================================================= | |
| 86 // | |
| 87 // Parser mode: where is the parser at? | |
| 88 // | |
| 89 named_enum ParserMode | |
| 90 { | |
| 91 PARSERMODE_TopLevel, // at top level | |
| 92 PARSERMODE_Event, // inside event definition | |
| 93 PARSERMODE_MainLoop, // inside mainloop | |
| 94 PARSERMODE_Onenter, // inside onenter | |
| 95 PARSERMODE_Onexit, // inside onexit | |
| 96 }; | |
| 97 | |
| 98 // ============================================================================ | |
| 99 // | |
| 100 struct Variable | |
| 101 { | |
| 102 String name; | |
| 103 String statename; | |
| 104 DataType type; | |
| 105 int index; | |
| 106 Writability writelevel; | |
| 107 int value; | |
| 108 String origin; | |
| 109 bool isarray; | |
| 110 | |
| 111 inline bool IsGlobal() const | |
| 112 { | |
| 113 return statename.isEmpty(); | |
| 114 } | |
| 115 }; | |
| 116 | |
| 117 // ============================================================================ | |
| 118 // | |
| 119 struct CaseInfo | |
| 120 { | |
| 121 ByteMark* mark; | |
| 122 int number; | |
| 123 DataBuffer* data; | |
| 124 }; | |
| 125 | |
| 126 // ============================================================================ | |
| 127 // | |
| 128 // Meta-data about scopes | |
| 129 // | |
| 130 struct ScopeInfo | |
| 131 { | |
| 132 ByteMark* mark1; | |
| 133 ByteMark* mark2; | |
| 134 ScopeType type; | |
| 135 DataBuffer* buffer1; | |
| 136 int globalVarIndexBase; | |
| 137 int globalArrayIndexBase; | |
| 138 int localVarIndexBase; | |
| 139 | |
| 140 // switch-related stuff | |
| 141 List<CaseInfo>::Iterator casecursor; | |
| 142 List<CaseInfo> cases; | |
| 143 List<Variable*> localVariables; | |
| 144 List<Variable*> globalVariables; | |
| 145 List<Variable*> globalArrays; | |
| 146 }; | |
| 147 | |
| 148 // ============================================================================ | |
| 149 // | |
| 150 class BotscriptParser | |
| 151 { | |
| 152 PROPERTY (public, bool, isReadOnly, setReadOnly, STOCK_WRITE) | |
| 153 | |
| 154 public: | |
| 155 enum EReset | |
| 156 { | |
| 157 eNoReset, | |
| 158 SCOPE_Reset, | |
| 159 }; | |
| 160 | |
| 161 BotscriptParser(); | |
| 162 ~BotscriptParser(); | |
| 163 void parseBotscript (String fileName); | |
| 164 DataBuffer* parseCommand (CommandInfo* comm); | |
| 165 DataBuffer* parseAssignment (Variable* var); | |
| 166 AssignmentOperator parseAssignmentOperator(); | |
| 167 String parseFloat(); | |
| 168 void pushScope (EReset reset = SCOPE_Reset); | |
| 169 DataBuffer* parseStatement(); | |
| 170 void addSwitchCase (DataBuffer* b); | |
| 171 void checkToplevel(); | |
| 172 void checkNotToplevel(); | |
| 173 bool tokenIs (ETokenType a); | |
| 174 String getTokenString(); | |
| 175 String describePosition() const; | |
| 176 void writeToFile (String outfile); | |
| 177 Variable* findVariable (const String& name); | |
| 178 bool isInGlobalState() const; | |
| 179 void suggestHighestVarIndex (bool global, int index); | |
| 180 int getHighestVarIndex (bool global); | |
| 181 | |
| 182 inline ScopeInfo& scope (int offset) | |
| 183 { | |
| 184 return m_scopeStack[m_scopeCursor - offset]; | |
| 185 } | |
| 186 | |
| 187 inline int numEvents() const | |
| 188 { | |
| 189 return m_numEvents; | |
| 190 } | |
| 191 | |
| 192 inline int numStates() const | |
| 193 { | |
| 194 return m_numStates; | |
| 195 } | |
| 196 | |
| 197 private: | |
| 198 // The main buffer - the contents of this is what we | |
| 199 // write to file after parsing is complete | |
| 200 DataBuffer* m_mainBuffer; | |
| 201 | |
| 202 // onenter buffer - the contents of the onenter {} block | |
| 203 // is buffered here and is merged further at the end of state | |
| 204 DataBuffer* m_onenterBuffer; | |
| 205 | |
| 206 // Mainloop buffer - the contents of the mainloop {} block | |
| 207 // is buffered here and is merged further at the end of state | |
| 208 DataBuffer* m_mainLoopBuffer; | |
| 209 | |
| 210 // Switch buffer - switch case data is recorded to this | |
| 211 // buffer initially, instead of into main buffer. | |
| 212 DataBuffer* m_switchBuffer; | |
| 213 | |
| 214 Lexer* m_lexer; | |
| 215 int m_numStates; | |
| 216 int m_numEvents; | |
| 217 ParserMode m_currentMode; | |
| 218 String m_currentState; | |
| 219 bool m_isStateSpawnDefined; | |
| 220 bool m_gotMainLoop; | |
| 221 int m_scopeCursor; | |
| 222 bool m_isElseAllowed; | |
| 223 int m_highestGlobalVarIndex; | |
| 224 int m_highestStateVarIndex; | |
| 225 int m_numWrittenBytes; | |
| 226 List<ScopeInfo> m_scopeStack; | |
| 227 int m_zandronumVersion; | |
| 228 bool m_defaultZandronumVersion; | |
| 229 | |
| 230 DataBuffer* currentBuffer(); | |
| 231 void parseStateBlock(); | |
| 232 void parseEventBlock(); | |
| 233 void parseMainloop(); | |
| 234 void parseOnEnterExit(); | |
| 235 void parseVar(); | |
| 236 void parseGoto(); | |
| 237 void parseIf(); | |
| 238 void parseElse(); | |
| 239 void parseWhileBlock(); | |
| 240 void parseForBlock(); | |
| 241 void parseDoBlock(); | |
| 242 void parseSwitchBlock(); | |
| 243 void parseSwitchCase(); | |
| 244 void parseSwitchDefault(); | |
| 245 void parseBreak(); | |
| 246 void parseContinue(); | |
| 247 void parseBlockEnd(); | |
| 248 void parseLabel(); | |
| 249 void parseEventdef(); | |
| 250 void parseFuncdef(); | |
| 251 void parseUsing(); | |
| 252 void writeMemberBuffers(); | |
| 253 void writeStringTable(); | |
| 254 DataBuffer* parseExpression (DataType reqtype, bool fromhere = false); | |
| 255 DataHeader getAssigmentDataHeader (AssignmentOperator op, Variable* var); | |
| 256 }; | |
| 257 | |
| 258 #endif // BOTC_PARSER_H |
