comparison: parser.cxx
parser.cxx
- changeset 62
- 824ab7b28e3c
- parent 61
- 11451e7a2fe6
- child 64
- dc5db6335601
equal
deleted
inserted
replaced
| 61:11451e7a2fe6 | 62:824ab7b28e3c |
|---|---|
| 66 bool g_stateSpawnDefined = false; | 66 bool g_stateSpawnDefined = false; |
| 67 bool g_GotMainLoop = false; | 67 bool g_GotMainLoop = false; |
| 68 unsigned int g_ScopeCursor = 0; | 68 unsigned int g_ScopeCursor = 0; |
| 69 DataBuffer* g_IfExpression = NULL; | 69 DataBuffer* g_IfExpression = NULL; |
| 70 bool g_CanElse = false; | 70 bool g_CanElse = false; |
| 71 str* g_UnmarkedLabels[MAX_MARKS]; | 71 str* g_UndefinedLabels[MAX_MARKS]; |
| 72 | 72 |
| 73 // ============================================================================ | 73 // ============================================================================ |
| 74 // Main parser code. Begins read of the script file, checks the syntax of it | 74 // Main parser code. Begins read of the script file, checks the syntax of it |
| 75 // and writes the data to the object file via ObjWriter - which also takes care | 75 // and writes the data to the object file via ObjWriter - which also takes care |
| 76 // of necessary buffering so stuff is written in the correct order. | 76 // of necessary buffering so stuff is written in the correct order. |
| 78 // Zero the entire block stack first | 78 // Zero the entire block stack first |
| 79 for (int i = 0; i < MAX_SCOPE; i++) | 79 for (int i = 0; i < MAX_SCOPE; i++) |
| 80 ZERO(scopestack[i]); | 80 ZERO(scopestack[i]); |
| 81 | 81 |
| 82 for (int i = 0; i < MAX_MARKS; i++) | 82 for (int i = 0; i < MAX_MARKS; i++) |
| 83 g_UnmarkedLabels[i] = NULL; | 83 g_UndefinedLabels[i] = NULL; |
| 84 | 84 |
| 85 while (Next()) { | 85 while (Next()) { |
| 86 // Check if else is potentically valid | 86 // Check if else is potentically valid |
| 87 if (!token.compare ("else") && !g_CanElse) | 87 if (!token.compare ("else") && !g_CanElse) |
| 88 ParserError ("else without preceding if"); | 88 ParserError ("else without preceding if"); |
| 204 unsigned int m = w->FindMark (token); | 204 unsigned int m = w->FindMark (token); |
| 205 | 205 |
| 206 // If not set, define it | 206 // If not set, define it |
| 207 if (m == MAX_MARKS) { | 207 if (m == MAX_MARKS) { |
| 208 m = w->AddMark (token); | 208 m = w->AddMark (token); |
| 209 g_UnmarkedLabels[m] = new str (token); | 209 g_UndefinedLabels[m] = new str (token); |
| 210 } | 210 } |
| 211 | 211 |
| 212 // Add a reference to the mark. | 212 // Add a reference to the mark. |
| 213 w->Write<word> (DH_GOTO); | 213 w->Write<word> (DH_GOTO); |
| 214 w->AddReference (m); | 214 w->AddReference (m); |
| 513 if (FindCommand (token)) | 513 if (FindCommand (token)) |
| 514 ParserError ("label name `%s` conflicts with command name\n", token.chars()); | 514 ParserError ("label name `%s` conflicts with command name\n", token.chars()); |
| 515 if (FindGlobalVariable (token)) | 515 if (FindGlobalVariable (token)) |
| 516 ParserError ("label name `%s` conflicts with variable\n", token.chars()); | 516 ParserError ("label name `%s` conflicts with variable\n", token.chars()); |
| 517 | 517 |
| 518 // See if the label is already defined but unmarked | 518 // See if a mark already exists for this label |
| 519 int mark = -1; | 519 int mark = -1; |
| 520 for (int i = 0; i < MAX_MARKS; i++) { | 520 for (int i = 0; i < MAX_MARKS; i++) { |
| 521 if (g_UnmarkedLabels[i] && !g_UnmarkedLabels[i]->compare (token)) { | 521 if (g_UndefinedLabels[i] && !g_UndefinedLabels[i]->compare (token)) { |
| 522 mark = i; | 522 mark = i; |
| 523 w->MoveMark (i); | 523 w->MoveMark (i); |
| 524 | 524 |
| 525 // No longer unmarked | 525 // No longer undefinde |
| 526 delete g_UnmarkedLabels[i]; | 526 delete g_UndefinedLabels[i]; |
| 527 g_UnmarkedLabels[i] = NULL; | 527 g_UndefinedLabels[i] = NULL; |
| 528 } | 528 } |
| 529 } | 529 } |
| 530 | 530 |
| 531 // Not found in unmarked lists, define it now | 531 // Not found in unmarked lists, define it now |
| 532 if (mark == -1) | 532 if (mark == -1) |
| 653 // stateSpawn must be defined! | 653 // stateSpawn must be defined! |
| 654 if (!g_stateSpawnDefined) | 654 if (!g_stateSpawnDefined) |
| 655 ParserError ("script must have a state named `stateSpawn`!"); | 655 ParserError ("script must have a state named `stateSpawn`!"); |
| 656 | 656 |
| 657 for (int i = 0; i < MAX_MARKS; i++) | 657 for (int i = 0; i < MAX_MARKS; i++) |
| 658 if (g_UnmarkedLabels[i]) | 658 if (g_UndefinedLabels[i]) |
| 659 ParserError ("label `%s` is referenced via `goto` but isn't defined\n", g_UnmarkedLabels[i]->chars()); | 659 ParserError ("label `%s` is referenced via `goto` but isn't defined\n", g_UndefinedLabels[i]->chars()); |
| 660 | 660 |
| 661 // Dump the last state's onenter and mainloop | 661 // Dump the last state's onenter and mainloop |
| 662 w->WriteBuffers (); | 662 w->WriteBuffers (); |
| 663 | 663 |
| 664 // String table | 664 // String table |
