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-rw-r--r--src/lua/lauxlib.h293
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diff --git a/src/lua/lauxlib.h b/src/lua/lauxlib.h
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1/*
2** $Id: lauxlib.h $
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 "luaconf.h"
16#include "lua.h"
17
18
19/* global table */
20#define LUA_GNAME "_G"
21
22
23typedef struct luaL_Buffer luaL_Buffer;
24
25
26/* extra error code for 'luaL_loadfilex' */
27#define LUA_ERRFILE (LUA_ERRERR+1)
28
29
30/* key, in the registry, for table of loaded modules */
31#define LUA_LOADED_TABLE "_LOADED"
32
33
34/* key, in the registry, for table of preloaded loaders */
35#define LUA_PRELOAD_TABLE "_PRELOAD"
36
37
38typedef struct luaL_Reg {
39 const char *name;
40 lua_CFunction func;
41} luaL_Reg;
42
43
44#define LUAL_NUMSIZES (sizeof(lua_Integer)*16 + sizeof(lua_Number))
45
46LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
47#define luaL_checkversion(L) \
48 luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
49
50LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
51LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
52LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
53LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
54LUALIB_API int (luaL_typeerror) (lua_State *L, int arg, const char *tname);
55LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
56 size_t *l);
57LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
58 const char *def, size_t *l);
59LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
60LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
61
62LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
63LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
64 lua_Integer def);
65
66LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
67LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
68LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
69
70LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
71LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname);
72LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname);
73LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
74
75LUALIB_API void (luaL_where) (lua_State *L, int lvl);
76LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
77
78LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
79 const char *const lst[]);
80
81LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
82LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
83
84
85/* predefined references */
86#define LUA_NOREF (-2)
87#define LUA_REFNIL (-1)
88
89LUALIB_API int (luaL_ref) (lua_State *L, int t);
90LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
91
92LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
93 const char *mode);
94
95#define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL)
96
97LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
98 const char *name, const char *mode);
99LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
100
101LUALIB_API lua_State *(luaL_newstate) (void);
102
103LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
104
105LUALIB_API void luaL_addgsub (luaL_Buffer *b, const char *s,
106 const char *p, const char *r);
107LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s,
108 const char *p, const char *r);
109
110LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
111
112LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
113
114LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
115 const char *msg, int level);
116
117LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
118 lua_CFunction openf, int glb);
119
120/*
121** ===============================================================
122** some useful macros
123** ===============================================================
124*/
125
126
127#define luaL_newlibtable(L,l) \
128 lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
129
130#define luaL_newlib(L,l) \
131 (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
132
133#define luaL_argcheck(L, cond,arg,extramsg) \
134 ((void)(luai_likely(cond) || luaL_argerror(L, (arg), (extramsg))))
135
136#define luaL_argexpected(L,cond,arg,tname) \
137 ((void)(luai_likely(cond) || luaL_typeerror(L, (arg), (tname))))
138
139#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
140#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
141
142#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
143
144#define luaL_dofile(L, fn) \
145 (luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
146
147#define luaL_dostring(L, s) \
148 (luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
149
150#define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
151
152#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
153
154#define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL)
155
156
157/* push the value used to represent failure/error */
158#define luaL_pushfail(L) lua_pushnil(L)
159
160
161/*
162** Internal assertions for in-house debugging
163*/
164#if !defined(lua_assert)
165
166#if defined LUAI_ASSERT
167 #include <assert.h>
168 #define lua_assert(c) assert(c)
169#else
170 #define lua_assert(c) ((void)0)
171#endif
172
173#endif
174
175
176
177/*
178** {======================================================
179** Generic Buffer manipulation
180** =======================================================
181*/
182
183struct luaL_Buffer {
184 char *b; /* buffer address */
185 size_t size; /* buffer size */
186 size_t n; /* number of characters in buffer */
187 lua_State *L;
188 union {
189 LUAI_MAXALIGN; /* ensure maximum alignment for buffer */
190 char b[LUAL_BUFFERSIZE]; /* initial buffer */
191 } init;
192};
193
194
195#define luaL_bufflen(bf) ((bf)->n)
196#define luaL_buffaddr(bf) ((bf)->b)
197
198
199#define luaL_addchar(B,c) \
200 ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \
201 ((B)->b[(B)->n++] = (c)))
202
203#define luaL_addsize(B,s) ((B)->n += (s))
204
205#define luaL_buffsub(B,s) ((B)->n -= (s))
206
207LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
208LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
209LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
210LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
211LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
212LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
213LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz);
214LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
215
216#define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE)
217
218/* }====================================================== */
219
220
221
222/*
223** {======================================================
224** File handles for IO library
225** =======================================================
226*/
227
228/*
229** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
230** initial structure 'luaL_Stream' (it may contain other fields
231** after that initial structure).
232*/
233
234#define LUA_FILEHANDLE "FILE*"
235
236
237typedef struct luaL_Stream {
238 FILE *f; /* stream (NULL for incompletely created streams) */
239 lua_CFunction closef; /* to close stream (NULL for closed streams) */
240} luaL_Stream;
241
242/* }====================================================== */
243
244/*
245** {==================================================================
246** "Abstraction Layer" for basic report of messages and errors
247** ===================================================================
248*/
249
250/* print a string */
251#if !defined(lua_writestring)
252#define lua_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
253#endif
254
255/* print a newline and flush the output */
256#if !defined(lua_writeline)
257#define lua_writeline() (lua_writestring("\n", 1), fflush(stdout))
258#endif
259
260/* print an error message */
261#if !defined(lua_writestringerror)
262#define lua_writestringerror(s,p) \
263 (fprintf(stderr, (s), (p)), fflush(stderr))
264#endif
265
266/* }================================================================== */
267
268
269/*
270** {============================================================
271** Compatibility with deprecated conversions
272** =============================================================
273*/
274#if defined(LUA_COMPAT_APIINTCASTS)
275
276#define luaL_checkunsigned(L,a) ((lua_Unsigned)luaL_checkinteger(L,a))
277#define luaL_optunsigned(L,a,d) \
278 ((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
279
280#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
281#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
282
283#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
284#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
285
286#endif
287/* }============================================================ */
288
289
290
291#endif
292
293
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