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Root/lua/lauxlib.h

1/*
2** $Id: lauxlib.h,v 1.88 2006/04/12 20:31:15 roberto Exp $
3** Auxiliary functions for building Lua libraries
4** See Copyright Notice in lua.h
5*/
6
7
8#ifndef lauxlib_h
9#define lauxlib_h
10
11
12#include <stddef.h>
13#include <stdio.h>
14
15#include "lua.h"
16
17
18#if defined(LUA_COMPAT_GETN)
19LUALIB_API int (luaL_getn) (lua_State *L, int t);
20LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
21#else
22#define luaL_getn(L,i) ((int)lua_objlen(L, i))
23#define luaL_setn(L,i,j) ((void)0) /* no op! */
24#endif
25
26#if defined(LUA_COMPAT_OPENLIB)
27#define luaI_openlibluaL_openlib
28#endif
29
30
31/* extra error code for `luaL_load' */
32#define LUA_ERRFILE (LUA_ERRERR+1)
33
34
35typedef struct luaL_Reg {
36 const char *name;
37 lua_CFunction func;
38} luaL_Reg;
39
40
41
42LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
43 const luaL_Reg *l, int nup);
44LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
45 const luaL_Reg *l);
46LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
47LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
48LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname);
49LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
50LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
51 size_t *l);
52LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
53 const char *def, size_t *l);
54LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
55LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
56
57LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
58LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
59 lua_Integer def);
60
61LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
62LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
63LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
64
65LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
66LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
67
68LUALIB_API void (luaL_where) (lua_State *L, int lvl);
69LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
70
71LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
72 const char *const lst[]);
73
74LUALIB_API int (luaL_ref) (lua_State *L, int t);
75LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
76
77LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
78LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
79 const char *name);
80LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
81
82LUALIB_API lua_State *(luaL_newstate) (void);
83
84
85LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
86 const char *r);
87
88LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
89 const char *fname, int szhint);
90
91
92
93
94/*
95** ===============================================================
96** some useful macros
97** ===============================================================
98*/
99
100#define luaL_argcheck(L, cond,numarg,extramsg)\
101((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
102#define luaL_checkstring(L,n)(luaL_checklstring(L, (n), NULL))
103#define luaL_optstring(L,n,d)(luaL_optlstring(L, (n), (d), NULL))
104#define luaL_checkint(L,n)((int)luaL_checkinteger(L, (n)))
105#define luaL_optint(L,n,d)((int)luaL_optinteger(L, (n), (d)))
106#define luaL_checklong(L,n)((long)luaL_checkinteger(L, (n)))
107#define luaL_optlong(L,n,d)((long)luaL_optinteger(L, (n), (d)))
108
109#define luaL_typename(L,i)lua_typename(L, lua_type(L,(i)))
110
111#define luaL_dofile(L, fn) \
112(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
113
114#define luaL_dostring(L, s) \
115(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
116
117#define luaL_getmetatable(L,n)(lua_getfield(L, LUA_REGISTRYINDEX, (n)))
118
119#define luaL_opt(L,f,n,d)(lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
120
121/*
122** {======================================================
123** Generic Buffer manipulation
124** =======================================================
125*/
126
127
128
129typedef struct luaL_Buffer {
130 char *p;/* current position in buffer */
131 int lvl; /* number of strings in the stack (level) */
132 lua_State *L;
133 char buffer[LUAL_BUFFERSIZE];
134} luaL_Buffer;
135
136#define luaL_addchar(B,c) \
137 ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
138 (*(B)->p++ = (char)(c)))
139
140/* compatibility only */
141#define luaL_putchar(B,c)luaL_addchar(B,c)
142
143#define luaL_addsize(B,n)((B)->p += (n))
144
145LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
146LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
147LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
148LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
149LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
150LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
151
152
153/* }====================================================== */
154
155
156/* compatibility with ref system */
157
158/* pre-defined references */
159#define LUA_NOREF (-2)
160#define LUA_REFNIL (-1)
161
162#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
163 (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
164
165#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref))
166
167#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
168
169
170#define luaL_regluaL_Reg
171
172#endif
173
174

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