LXR syslinux/com32/lua/src/llex.h

   1/*
   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*/
  24enum 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' */
  40LUAI_DATA const char *const luaX_tokens [];
  41
  42
  43typedef union {
  44  lua_Number r;
  45  TString *ts;
  46} SemInfo;  /* semantics information */
  47
  48
  49typedef struct Token {
  50  int token;
  51  SemInfo seminfo;
  52} Token;
  53
  54
  55typedef 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
  70LUAI_FUNC void luaX_init (lua_State *L);
  71LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
  72                              TString *source);
  73LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
  74LUAI_FUNC void luaX_next (LexState *ls);
  75LUAI_FUNC void luaX_lookahead (LexState *ls);
  76LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token);
  77LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);
  78LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
  79
  80
  81#endif
  82