mirror of
https://github.com/lua/lua
synced 2024-11-22 04:41:23 +03:00
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
/*
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** $Id: lstring.h $
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** String table (keep all strings handled by Lua)
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** See Copyright Notice in lua.h
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*/
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#ifndef lstring_h
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#define lstring_h
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#include "lgc.h"
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#include "lobject.h"
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#include "lstate.h"
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/*
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** Memory-allocation error message must be preallocated (it cannot
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** be created after memory is exhausted)
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*/
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#define MEMERRMSG "not enough memory"
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/*
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** Maximum length for short strings, that is, strings that are
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** internalized. (Cannot be smaller than reserved words or tags for
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** metamethods, as these strings must be internalized;
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** #("function") = 8, #("__newindex") = 10.)
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*/
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#if !defined(LUAI_MAXSHORTLEN)
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#define LUAI_MAXSHORTLEN 40
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#endif
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/*
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** Size of a short TString: Size of the header plus space for the string
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** itself (including final '\0').
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*/
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#define sizestrshr(l) \
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(offsetof(TString, contents) + ((l) + 1) * sizeof(char))
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#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
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(sizeof(s)/sizeof(char))-1))
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/*
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** test whether a string is a reserved word
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*/
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#define isreserved(s) ((s)->tt == LUA_VSHRSTR && (s)->extra > 0)
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/*
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** equality for short strings, which are always internalized
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*/
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#define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
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LUAI_FUNC unsigned luaS_hash (const char *str, size_t l, unsigned seed);
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LUAI_FUNC unsigned luaS_hashlongstr (TString *ts);
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LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
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LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
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LUAI_FUNC void luaS_clearcache (global_State *g);
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LUAI_FUNC void luaS_init (lua_State *L);
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LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
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LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s,
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unsigned short nuvalue);
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LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
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LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
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LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
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LUAI_FUNC TString *luaS_newextlstr (lua_State *L,
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const char *s, size_t len, lua_Alloc falloc, void *ud);
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LUAI_FUNC size_t luaS_sizelngstr (size_t len, int kind);
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#endif
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