| commit | author | age | ||
| 6e1425 | 1 | /* |
| H | 2 | ** $Id: llex.h,v 1.58.1.1 2007/12/27 13:02:25 roberto Exp $ |
| 3 | ** Lexical Analyzer | |
| 4 | ** See Copyright Notice in lua.h | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef llex_h | |
| 8 | #define llex_h | |
| 9 | ||
| 10 | #include "lobject.h" | |
| 11 | #include "lzio.h" | |
| 12 | ||
| 13 | ||
| 14 | #define FIRST_RESERVED 257 | |
| 15 | ||
| 16 | /* maximum length of a reserved word */ | |
| 17 | #define TOKEN_LEN (sizeof("function")/sizeof(char)) | |
| 18 | ||
| 19 | ||
| 20 | /* | |
| 21 | * WARNING: if you change the order of this enumeration, | |
| 22 | * grep "ORDER RESERVED" | |
| 23 | */ | |
| 24 | enum RESERVED { | |
| 25 | /* terminal symbols denoted by reserved words */ | |
| 26 | TK_AND = FIRST_RESERVED, TK_BREAK, | |
| 27 | TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION, | |
| 28 | TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT, | |
| 29 | TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, | |
| 30 | /* other terminal symbols */ | |
| 31 | TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER, | |
| 32 | TK_NAME, TK_STRING, TK_EOS | |
| 33 | }; | |
| 34 | ||
| 35 | /* number of reserved words */ | |
| 36 | #define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1)) | |
| 37 | ||
| 38 | ||
| 39 | /* array with token `names' */ | |
| 40 | LUAI_DATA const char *const luaX_tokens []; | |
| 41 | ||
| 42 | ||
| 43 | typedef union { | |
| 44 | lua_Number r; | |
| 45 | TString *ts; | |
| 46 | } SemInfo; /* semantics information */ | |
| 47 | ||
| 48 | ||
| 49 | typedef struct Token { | |
| 50 | int token; | |
| 51 | SemInfo seminfo; | |
| 52 | } Token; | |
| 53 | ||
| 54 | ||
| 55 | typedef struct LexState { | |
| 56 | int current; /* current character (charint) */ | |
| 57 | int linenumber; /* input line counter */ | |
| 58 | int lastline; /* line of last token `consumed' */ | |
| 59 | Token t; /* current token */ | |
| 60 | Token lookahead; /* look ahead token */ | |
| 61 | struct FuncState *fs; /* `FuncState' is private to the parser */ | |
| 62 | struct lua_State *L; | |
| 63 | ZIO *z; /* input stream */ | |
| 64 | Mbuffer *buff; /* buffer for tokens */ | |
| 65 | TString *source; /* current source name */ | |
| 66 | char decpoint; /* locale decimal point */ | |
| 67 | } LexState; | |
| 68 | ||
| 69 | ||
| 70 | LUAI_FUNC void luaX_init (lua_State *L); | |
| 71 | LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, | |
| 72 | TString *source); | |
| 73 | LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l); | |
| 74 | LUAI_FUNC void luaX_next (LexState *ls); | |
| 75 | LUAI_FUNC void luaX_lookahead (LexState *ls); | |
| 76 | LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token); | |
| 77 | LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s); | |
| 78 | LUAI_FUNC const char *luaX_token2str (LexState *ls, int token); | |
| 79 | ||
| 80 | ||
| 81 | #endif | |
