comparison: src/commands.cc
src/commands.cc
- changeset 82
- 841562f5a32f
- parent 79
- 2425fa6a4f21
- child 85
- 264a61e9eba0
equal
deleted
inserted
replaced
| 81:071715c17296 | 82:841562f5a32f |
|---|---|
| 38 #include "lexer.h" | 38 #include "lexer.h" |
| 39 | 39 |
| 40 static list<command_info*> g_commands; | 40 static list<command_info*> g_commands; |
| 41 | 41 |
| 42 // ============================================================================ | 42 // ============================================================================ |
| 43 // Reads command definitions from commands.def and stores them to memory. | 43 // |
| 44 void init_commands () | 44 void add_command_definition (command_info* comm) |
| 45 { | 45 { |
| 46 lexer lx; | 46 // Ensure that there is no conflicts |
| 47 lx.process_file ("commands.def"); | 47 for (command_info* it : g_commands) |
| 48 if (it->number == comm->number) | |
| 49 error ("Attempted to redefine command #%1 (%2) as %3", | |
| 50 g_commands[comm->number]->name, comm->name); | |
| 48 | 51 |
| 49 while (lx.get_next()) | 52 g_commands << comm; |
| 50 { | |
| 51 command_info* comm = new command_info; | |
| 52 | |
| 53 // Number | |
| 54 lx.must_be (tk_number); | |
| 55 comm->number = lx.get_token()->text.to_long(); | |
| 56 | |
| 57 lx.must_get_next (tk_colon); | |
| 58 | |
| 59 // Name | |
| 60 lx.must_get_next (tk_symbol); | |
| 61 comm->name = lx.get_token()->text; | |
| 62 | |
| 63 if (IsKeyword (comm->name)) | |
| 64 error ("command name `%1` conflicts with keyword", comm->name); | |
| 65 | |
| 66 lx.must_get_next (tk_colon); | |
| 67 | |
| 68 // Return value | |
| 69 lx.must_get_any_of ({tk_int, tk_void, tk_bool, tk_str}); | |
| 70 comm->returnvalue = GetTypeByName (lx.get_token()->text); // TODO | |
| 71 assert (comm->returnvalue != -1); | |
| 72 | |
| 73 lx.must_get_next (tk_colon); | |
| 74 | |
| 75 // Num args | |
| 76 lx.must_get_next (tk_number); | |
| 77 comm->numargs = lx.get_token()->text.to_long(); | |
| 78 | |
| 79 lx.must_get_next (tk_colon); | |
| 80 | |
| 81 // Max args | |
| 82 lx.must_get_next (tk_number); | |
| 83 comm->maxargs = lx.get_token()->text.to_long(); | |
| 84 | |
| 85 // Argument types | |
| 86 int curarg = 0; | |
| 87 | |
| 88 while (curarg < comm->maxargs) | |
| 89 { | |
| 90 command_argument arg; | |
| 91 lx.must_get_next (tk_colon); | |
| 92 lx.must_get_any_of ({tk_int, tk_bool, tk_str}); | |
| 93 type_e type = GetTypeByName (lx.get_token()->text); | |
| 94 assert (type != -1 && type != TYPE_VOID); | |
| 95 arg.type = type; | |
| 96 | |
| 97 lx.must_get_next (tk_paren_start); | |
| 98 lx.must_get_next (tk_symbol); | |
| 99 arg.name = lx.get_token()->text; | |
| 100 | |
| 101 // If this is an optional parameter, we need the default value. | |
| 102 if (curarg >= comm->numargs) | |
| 103 { | |
| 104 lx.must_get_next (tk_assign); | |
| 105 | |
| 106 switch (type) | |
| 107 { | |
| 108 case TYPE_INT: | |
| 109 case TYPE_BOOL: | |
| 110 lx.must_get_next (tk_number); | |
| 111 break; | |
| 112 | |
| 113 case TYPE_STRING: | |
| 114 lx.must_get_next (tk_string); | |
| 115 break; | |
| 116 | |
| 117 case TYPE_UNKNOWN: | |
| 118 case TYPE_VOID: | |
| 119 break; | |
| 120 } | |
| 121 | |
| 122 arg.defvalue = lx.get_token()->text.to_long(); | |
| 123 } | |
| 124 | |
| 125 lx.must_get_next (tk_paren_end); | |
| 126 comm->args << arg; | |
| 127 curarg++; | |
| 128 } | |
| 129 | |
| 130 g_commands << comm; | |
| 131 } | |
| 132 | |
| 133 if (g_commands.is_empty()) | |
| 134 error ("no commands defined!\n"); | |
| 135 | |
| 136 print ("%1 command definitions read.\n", g_commands.size()); | |
| 137 } | 53 } |
| 138 | 54 |
| 139 // ============================================================================ | 55 // ============================================================================ |
| 140 // Finds a command by name | 56 // Finds a command by name |
| 141 command_info* find_command_by_name (string fname) | 57 command_info* find_command_by_name (string fname) |
