1 /* 2 ** $Id: lstring.h $ 3 ** String table (keep all strings handled by Lua) 4 ** See Copyright Notice in lua.h 5 */ 6 7 #ifndef lstring_h 8 #define lstring_h 9 10 #include "lgc.h" 11 #include "lobject.h" 12 #include "lstate.h" 13 14 15 /* 16 ** Memory-allocation error message must be preallocated (it cannot 17 ** be created after memory is exhausted) 18 */ 19 #define MEMERRMSG "not enough memory" 20 21 22 /* 23 ** Size of a TString: Size of the header plus space for the string 24 ** itself (including final '\0'). 25 */ 26 #define sizelstring(l) (offsetof(TString, contents) + ((l) + 1) * sizeof(char)) 27 28 #define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \ 29 (sizeof(s)/sizeof(char))-1)) 30 31 32 /* 33 ** test whether a string is a reserved word 34 */ 35 #define isreserved(s) ((s)->tt == LUA_VSHRSTR && (s)->extra > 0) 36 37 38 /* 39 ** equality for short strings, which are always internalized 40 */ 41 #define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b)) 42 43 44 LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed); 45 LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts); 46 LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b); 47 LUAI_FUNC void luaS_resize (lua_State *L, int newsize); 48 LUAI_FUNC void luaS_clearcache (global_State *g); 49 LUAI_FUNC void luaS_init (lua_State *L); 50 LUAI_FUNC void luaS_remove (lua_State *L, TString *ts); 51 LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue); 52 LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l); 53 LUAI_FUNC TString *luaS_new (lua_State *L, const char *str); 54 LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l); 55 56 57 #endif 58