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
44LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
45LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
46LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
47LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
48LUAI_FUNC void luaS_clearcache (global_State *g);
49LUAI_FUNC void luaS_init (lua_State *L);
50LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
51LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue);
52LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
53LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
54LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
55
56
57#endif
58