luaconf.h 22 KB

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  1. /*
  2. ** $Id: luaconf.h $
  3. ** Configuration file for Lua
  4. ** See Copyright Notice in lua.h
  5. */
  6. #ifndef luaconf_h
  7. #define luaconf_h
  8. #include <limits.h>
  9. #include <stddef.h>
  10. /*
  11. ** ===================================================================
  12. ** General Configuration File for Lua
  13. **
  14. ** Some definitions here can be changed externally, through the compiler
  15. ** (e.g., with '-D' options): They are commented out or protected
  16. ** by '#if !defined' guards. However, several other definitions
  17. ** should be changed directly here, either because they affect the
  18. ** Lua ABI (by making the changes here, you ensure that all software
  19. ** connected to Lua, such as C libraries, will be compiled with the same
  20. ** configuration); or because they are seldom changed.
  21. **
  22. ** Search for "@@" to find all configurable definitions.
  23. ** ===================================================================
  24. */
  25. /*
  26. ** {====================================================================
  27. ** System Configuration: macros to adapt (if needed) Lua to some
  28. ** particular platform, for instance restricting it to C89.
  29. ** =====================================================================
  30. */
  31. /*
  32. @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
  33. ** Define it if you want Lua to avoid the use of a few C99 features
  34. ** or Windows-specific features on Windows.
  35. */
  36. /* #define LUA_USE_C89 */
  37. /*
  38. ** By default, Lua on Windows use (some) specific Windows features
  39. */
  40. #if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE)
  41. #define LUA_USE_WINDOWS /* enable goodies for regular Windows */
  42. #endif
  43. #if defined(LUA_USE_WINDOWS)
  44. #define LUA_DL_DLL /* enable support for DLL */
  45. #define LUA_USE_C89 /* broadly, Windows is C89 */
  46. #endif
  47. /*
  48. ** When Posix DLL ('LUA_USE_DLOPEN') is enabled, the Lua stand-alone
  49. ** application will try to dynamically link a 'readline' facility
  50. ** for its REPL. In that case, LUA_READLINELIB is the name of the
  51. ** library it will look for those facilities. If lua.c cannot open
  52. ** the specified library, it will generate a warning and then run
  53. ** without 'readline'. If that macro is not defined, lua.c will not
  54. ** use 'readline'.
  55. */
  56. #if defined(LUA_USE_LINUX)
  57. #define LUA_USE_POSIX
  58. #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
  59. #define LUA_READLINELIB "libreadline.so"
  60. #endif
  61. #if defined(LUA_USE_MACOSX)
  62. #define LUA_USE_POSIX
  63. #define LUA_USE_DLOPEN /* MacOS does not need -ldl */
  64. #define LUA_READLINELIB "libedit.dylib"
  65. #endif
  66. #if defined(LUA_USE_IOS)
  67. #define LUA_USE_POSIX
  68. #define LUA_USE_DLOPEN
  69. #endif
  70. /*
  71. @@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits.
  72. */
  73. #define LUAI_IS32INT ((UINT_MAX >> 30) >= 3)
  74. /* }================================================================== */
  75. /*
  76. ** {==================================================================
  77. ** Configuration for Number types. These options should not be
  78. ** set externally, because any other code connected to Lua must
  79. ** use the same configuration.
  80. ** ===================================================================
  81. */
  82. /*
  83. @@ LUA_INT_TYPE defines the type for Lua integers.
  84. @@ LUA_FLOAT_TYPE defines the type for Lua floats.
  85. ** Lua should work fine with any mix of these options supported
  86. ** by your C compiler. The usual configurations are 64-bit integers
  87. ** and 'double' (the default), 32-bit integers and 'float' (for
  88. ** restricted platforms), and 'long'/'double' (for C compilers not
  89. ** compliant with C99, which may not have support for 'long long').
  90. */
  91. /* predefined options for LUA_INT_TYPE */
  92. #define LUA_INT_INT 1
  93. #define LUA_INT_LONG 2
  94. #define LUA_INT_LONGLONG 3
  95. /* predefined options for LUA_FLOAT_TYPE */
  96. #define LUA_FLOAT_FLOAT 1
  97. #define LUA_FLOAT_DOUBLE 2
  98. #define LUA_FLOAT_LONGDOUBLE 3
  99. /* Default configuration ('long long' and 'double', for 64-bit Lua) */
  100. #define LUA_INT_DEFAULT LUA_INT_LONGLONG
  101. #define LUA_FLOAT_DEFAULT LUA_FLOAT_DOUBLE
  102. /*
  103. @@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats.
  104. */
  105. #define LUA_32BITS 0
  106. /*
  107. @@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
  108. ** C89 ('long' and 'double'); Windows always has '__int64', so it does
  109. ** not need to use this case.
  110. */
  111. #if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
  112. #define LUA_C89_NUMBERS 1
  113. #else
  114. #define LUA_C89_NUMBERS 0
  115. #endif
  116. #if LUA_32BITS /* { */
  117. /*
  118. ** 32-bit integers and 'float'
  119. */
  120. #if LUAI_IS32INT /* use 'int' if big enough */
  121. #define LUA_INT_TYPE LUA_INT_INT
  122. #else /* otherwise use 'long' */
  123. #define LUA_INT_TYPE LUA_INT_LONG
  124. #endif
  125. #define LUA_FLOAT_TYPE LUA_FLOAT_FLOAT
  126. #elif LUA_C89_NUMBERS /* }{ */
  127. /*
  128. ** largest types available for C89 ('long' and 'double')
  129. */
  130. #define LUA_INT_TYPE LUA_INT_LONG
  131. #define LUA_FLOAT_TYPE LUA_FLOAT_DOUBLE
  132. #else /* }{ */
  133. /* use defaults */
  134. #define LUA_INT_TYPE LUA_INT_DEFAULT
  135. #define LUA_FLOAT_TYPE LUA_FLOAT_DEFAULT
  136. #endif /* } */
  137. /* }================================================================== */
  138. /*
  139. ** {==================================================================
  140. ** Configuration for Paths.
  141. ** ===================================================================
  142. */
  143. /*
  144. ** LUA_PATH_SEP is the character that separates templates in a path.
  145. ** LUA_PATH_MARK is the string that marks the substitution points in a
  146. ** template.
  147. ** LUA_EXEC_DIR in a Windows path is replaced by the executable's
  148. ** directory.
  149. */
  150. #define LUA_PATH_SEP ";"
  151. #define LUA_PATH_MARK "?"
  152. #define LUA_EXEC_DIR "!"
  153. /*
  154. @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
  155. ** Lua libraries.
  156. @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
  157. ** C libraries.
  158. ** CHANGE them if your machine has a non-conventional directory
  159. ** hierarchy or if you want to install your libraries in
  160. ** non-conventional directories.
  161. */
  162. #define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
  163. #if defined(_WIN32) /* { */
  164. /*
  165. ** In Windows, any exclamation mark ('!') in the path is replaced by the
  166. ** path of the directory of the executable file of the current process.
  167. */
  168. #define LUA_LDIR "!\\lua\\"
  169. #define LUA_CDIR "!\\"
  170. #define LUA_SHRDIR "!\\..\\share\\lua\\" LUA_VDIR "\\"
  171. #if !defined(LUA_PATH_DEFAULT)
  172. #define LUA_PATH_DEFAULT \
  173. LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
  174. LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" \
  175. LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
  176. ".\\?.lua;" ".\\?\\init.lua"
  177. #endif
  178. #if !defined(LUA_CPATH_DEFAULT)
  179. #define LUA_CPATH_DEFAULT \
  180. LUA_CDIR"?.dll;" \
  181. LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
  182. LUA_CDIR"loadall.dll;" ".\\?.dll"
  183. #endif
  184. #else /* }{ */
  185. #define LUA_ROOT "/usr/local/"
  186. #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR "/"
  187. #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR "/"
  188. #if !defined(LUA_PATH_DEFAULT)
  189. #define LUA_PATH_DEFAULT \
  190. LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
  191. LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" \
  192. "./?.lua;" "./?/init.lua"
  193. #endif
  194. #if !defined(LUA_CPATH_DEFAULT)
  195. #define LUA_CPATH_DEFAULT \
  196. LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
  197. #endif
  198. #endif /* } */
  199. /*
  200. @@ LUA_DIRSEP is the directory separator (for submodules).
  201. ** CHANGE it if your machine does not use "/" as the directory separator
  202. ** and is not Windows. (On Windows Lua automatically uses "\".)
  203. */
  204. #if !defined(LUA_DIRSEP)
  205. #if defined(_WIN32)
  206. #define LUA_DIRSEP "\\"
  207. #else
  208. #define LUA_DIRSEP "/"
  209. #endif
  210. #endif
  211. /*
  212. ** LUA_IGMARK is a mark to ignore all after it when building the
  213. ** module name (e.g., used to build the luaopen_ function name).
  214. ** Typically, the suffix after the mark is the module version,
  215. ** as in "mod-v1.2.so".
  216. */
  217. #define LUA_IGMARK "-"
  218. /* }================================================================== */
  219. /*
  220. ** {==================================================================
  221. ** Marks for exported symbols in the C code
  222. ** ===================================================================
  223. */
  224. /*
  225. @@ LUA_API is a mark for all core API functions.
  226. @@ LUALIB_API is a mark for all auxiliary library functions.
  227. @@ LUAMOD_API is a mark for all standard library opening functions.
  228. ** CHANGE them if you need to define those functions in some special way.
  229. ** For instance, if you want to create one Windows DLL with the core and
  230. ** the libraries, you may want to use the following definition (define
  231. ** LUA_BUILD_AS_DLL to get it).
  232. */
  233. #if defined(LUA_BUILD_AS_DLL) /* { */
  234. #if defined(LUA_CORE) || defined(LUA_LIB) /* { */
  235. #define LUA_API __declspec(dllexport)
  236. #else /* }{ */
  237. #define LUA_API __declspec(dllimport)
  238. #endif /* } */
  239. #else /* }{ */
  240. #define LUA_API extern
  241. #endif /* } */
  242. /*
  243. ** More often than not the libs go together with the core.
  244. */
  245. #define LUALIB_API LUA_API
  246. #define LUAMOD_API LUA_API
  247. /*
  248. @@ LUAI_FUNC is a mark for all extern functions that are not to be
  249. ** exported to outside modules.
  250. @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables,
  251. ** none of which to be exported to outside modules (LUAI_DDEF for
  252. ** definitions and LUAI_DDEC for declarations).
  253. ** CHANGE them if you need to mark them in some special way. Elf/gcc
  254. ** (versions 3.2 and later) mark them as "hidden" to optimize access
  255. ** when Lua is compiled as a shared library. Not all elf targets support
  256. ** this attribute. Unfortunately, gcc does not offer a way to check
  257. ** whether the target offers that support, and those without support
  258. ** give a warning about it. To avoid these warnings, change to the
  259. ** default definition.
  260. */
  261. #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
  262. defined(__ELF__) /* { */
  263. #define LUAI_FUNC __attribute__((visibility("internal"))) extern
  264. #else /* }{ */
  265. #define LUAI_FUNC extern
  266. #endif /* } */
  267. #define LUAI_DDEC(dec) LUAI_FUNC dec
  268. #define LUAI_DDEF /* empty */
  269. /* }================================================================== */
  270. /*
  271. ** {==================================================================
  272. ** Compatibility with previous versions
  273. ** ===================================================================
  274. */
  275. /*
  276. @@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3.
  277. ** You can define it to get all options, or change specific options
  278. ** to fit your specific needs.
  279. */
  280. #if defined(LUA_COMPAT_5_3) /* { */
  281. /*
  282. @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
  283. ** functions in the mathematical library.
  284. ** (These functions were already officially removed in 5.3;
  285. ** nevertheless they are still available here.)
  286. */
  287. #define LUA_COMPAT_MATHLIB
  288. /*
  289. @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
  290. ** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
  291. ** luaL_checkint, luaL_checklong, etc.)
  292. ** (These macros were also officially removed in 5.3, but they are still
  293. ** available here.)
  294. */
  295. #define LUA_COMPAT_APIINTCASTS
  296. /*
  297. @@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod
  298. ** using '__lt'.
  299. */
  300. #define LUA_COMPAT_LT_LE
  301. /*
  302. @@ The following macros supply trivial compatibility for some
  303. ** changes in the API. The macros themselves document how to
  304. ** change your code to avoid using them.
  305. ** (Once more, these macros were officially removed in 5.3, but they are
  306. ** still available here.)
  307. */
  308. #define lua_strlen(L,i) lua_rawlen(L, (i))
  309. #define lua_objlen(L,i) lua_rawlen(L, (i))
  310. #define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ)
  311. #define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT)
  312. #endif /* } */
  313. /* }================================================================== */
  314. /*
  315. ** {==================================================================
  316. ** Configuration for Numbers (low-level part).
  317. ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
  318. ** satisfy your needs.
  319. ** ===================================================================
  320. */
  321. /*
  322. @@ LUAI_UACNUMBER is the result of a 'default argument promotion'
  323. @@ over a floating number.
  324. @@ l_floatatt(x) corrects float attribute 'x' to the proper float type
  325. ** by prefixing it with one of FLT/DBL/LDBL.
  326. @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
  327. @@ LUA_NUMBER_FMT is the format for writing floats with the maximum
  328. ** number of digits that respects tostring(tonumber(numeral)) == numeral.
  329. ** (That would be floor(log10(2^n)), where n is the number of bits in
  330. ** the float mantissa.)
  331. @@ LUA_NUMBER_FMT_N is the format for writing floats with the minimum
  332. ** number of digits that ensures tonumber(tostring(number)) == number.
  333. ** (That would be LUA_NUMBER_FMT+2.)
  334. @@ l_mathop allows the addition of an 'l' or 'f' to all math operations.
  335. @@ l_floor takes the floor of a float.
  336. @@ lua_str2number converts a decimal numeral to a number.
  337. */
  338. /* The following definitions are good for most cases here */
  339. #define l_floor(x) (l_mathop(floor)(x))
  340. /*
  341. @@ lua_numbertointeger converts a float number with an integral value
  342. ** to an integer, or returns 0 if float is not within the range of
  343. ** a lua_Integer. (The range comparisons are tricky because of
  344. ** rounding. The tests here assume a two-complement representation,
  345. ** where MININTEGER always has an exact representation as a float;
  346. ** MAXINTEGER may not have one, and therefore its conversion to float
  347. ** may have an ill-defined value.)
  348. */
  349. #define lua_numbertointeger(n,p) \
  350. ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
  351. (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
  352. (*(p) = (LUA_INTEGER)(n), 1))
  353. /* now the variable definitions */
  354. #if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT /* { single float */
  355. #define LUA_NUMBER float
  356. #define l_floatatt(n) (FLT_##n)
  357. #define LUAI_UACNUMBER double
  358. #define LUA_NUMBER_FRMLEN ""
  359. #define LUA_NUMBER_FMT "%.7g"
  360. #define LUA_NUMBER_FMT_N "%.9g"
  361. #define l_mathop(op) op##f
  362. #define lua_str2number(s,p) strtof((s), (p))
  363. #elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE /* }{ long double */
  364. #define LUA_NUMBER long double
  365. #define l_floatatt(n) (LDBL_##n)
  366. #define LUAI_UACNUMBER long double
  367. #define LUA_NUMBER_FRMLEN "L"
  368. #define LUA_NUMBER_FMT "%.19Lg"
  369. #define LUA_NUMBER_FMT_N "%.21Lg"
  370. #define l_mathop(op) op##l
  371. #define lua_str2number(s,p) strtold((s), (p))
  372. #elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE /* }{ double */
  373. #define LUA_NUMBER double
  374. #define l_floatatt(n) (DBL_##n)
  375. #define LUAI_UACNUMBER double
  376. #define LUA_NUMBER_FRMLEN ""
  377. #define LUA_NUMBER_FMT "%.15g"
  378. #define LUA_NUMBER_FMT_N "%.17g"
  379. #define l_mathop(op) op
  380. #define lua_str2number(s,p) strtod((s), (p))
  381. #else /* }{ */
  382. #error "numeric float type not defined"
  383. #endif /* } */
  384. /*
  385. @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
  386. @@ LUAI_UACINT is the result of a 'default argument promotion'
  387. @@ over a LUA_INTEGER.
  388. @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
  389. @@ LUA_INTEGER_FMT is the format for writing integers.
  390. @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
  391. @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
  392. @@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED.
  393. @@ lua_integer2str converts an integer to a string.
  394. */
  395. /* The following definitions are good for most cases here */
  396. #define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d"
  397. #define LUAI_UACINT LUA_INTEGER
  398. #define lua_integer2str(s,sz,n) \
  399. l_sprintf((s), sz, LUA_INTEGER_FMT, (LUAI_UACINT)(n))
  400. /*
  401. ** use LUAI_UACINT here to avoid problems with promotions (which
  402. ** can turn a comparison between unsigneds into a signed comparison)
  403. */
  404. #define LUA_UNSIGNED unsigned LUAI_UACINT
  405. /* now the variable definitions */
  406. #if LUA_INT_TYPE == LUA_INT_INT /* { int */
  407. #define LUA_INTEGER int
  408. #define LUA_INTEGER_FRMLEN ""
  409. #define LUA_MAXINTEGER INT_MAX
  410. #define LUA_MININTEGER INT_MIN
  411. #define LUA_MAXUNSIGNED UINT_MAX
  412. #elif LUA_INT_TYPE == LUA_INT_LONG /* }{ long */
  413. #define LUA_INTEGER long
  414. #define LUA_INTEGER_FRMLEN "l"
  415. #define LUA_MAXINTEGER LONG_MAX
  416. #define LUA_MININTEGER LONG_MIN
  417. #define LUA_MAXUNSIGNED ULONG_MAX
  418. #elif LUA_INT_TYPE == LUA_INT_LONGLONG /* }{ long long */
  419. /* use presence of macro LLONG_MAX as proxy for C99 compliance */
  420. #if defined(LLONG_MAX) /* { */
  421. /* use ISO C99 stuff */
  422. #define LUA_INTEGER long long
  423. #define LUA_INTEGER_FRMLEN "ll"
  424. #define LUA_MAXINTEGER LLONG_MAX
  425. #define LUA_MININTEGER LLONG_MIN
  426. #define LUA_MAXUNSIGNED ULLONG_MAX
  427. #elif defined(LUA_USE_WINDOWS) /* }{ */
  428. /* in Windows, can use specific Windows types */
  429. #define LUA_INTEGER __int64
  430. #define LUA_INTEGER_FRMLEN "I64"
  431. #define LUA_MAXINTEGER _I64_MAX
  432. #define LUA_MININTEGER _I64_MIN
  433. #define LUA_MAXUNSIGNED _UI64_MAX
  434. #else /* }{ */
  435. #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
  436. or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
  437. #endif /* } */
  438. #else /* }{ */
  439. #error "numeric integer type not defined"
  440. #endif /* } */
  441. /* }================================================================== */
  442. /*
  443. ** {==================================================================
  444. ** Dependencies with C99 and other C details
  445. ** ===================================================================
  446. */
  447. /*
  448. @@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89.
  449. ** (All uses in Lua have only one format item.)
  450. */
  451. #if !defined(LUA_USE_C89)
  452. #define l_sprintf(s,sz,f,i) snprintf(s,sz,f,i)
  453. #else
  454. #define l_sprintf(s,sz,f,i) ((void)(sz), sprintf(s,f,i))
  455. #endif
  456. /*
  457. @@ lua_strx2number converts a hexadecimal numeral to a number.
  458. ** In C99, 'strtod' does that conversion. Otherwise, you can
  459. ** leave 'lua_strx2number' undefined and Lua will provide its own
  460. ** implementation.
  461. */
  462. #if !defined(LUA_USE_C89)
  463. #define lua_strx2number(s,p) lua_str2number(s,p)
  464. #endif
  465. /*
  466. @@ lua_pointer2str converts a pointer to a readable string in a
  467. ** non-specified way.
  468. */
  469. #define lua_pointer2str(buff,sz,p) l_sprintf(buff,sz,"%p",p)
  470. /*
  471. @@ lua_number2strx converts a float to a hexadecimal numeral.
  472. ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
  473. ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
  474. ** provide its own implementation.
  475. */
  476. #if !defined(LUA_USE_C89)
  477. #define lua_number2strx(L,b,sz,f,n) \
  478. ((void)L, l_sprintf(b,sz,f,(LUAI_UACNUMBER)(n)))
  479. #endif
  480. /*
  481. ** 'strtof' and 'opf' variants for math functions are not valid in
  482. ** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the
  483. ** availability of these variants. ('math.h' is already included in
  484. ** all files that use these macros.)
  485. */
  486. #if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF))
  487. #undef l_mathop /* variants not available */
  488. #undef lua_str2number
  489. #define l_mathop(op) (lua_Number)op /* no variant */
  490. #define lua_str2number(s,p) ((lua_Number)strtod((s), (p)))
  491. #endif
  492. /*
  493. @@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
  494. ** functions. It must be a numerical type; Lua will use 'intptr_t' if
  495. ** available, otherwise it will use 'ptrdiff_t' (the nearest thing to
  496. ** 'intptr_t' in C89)
  497. */
  498. #define LUA_KCONTEXT ptrdiff_t
  499. #if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
  500. __STDC_VERSION__ >= 199901L
  501. #include <stdint.h>
  502. #if defined(INTPTR_MAX) /* even in C99 this type is optional */
  503. #undef LUA_KCONTEXT
  504. #define LUA_KCONTEXT intptr_t
  505. #endif
  506. #endif
  507. /*
  508. @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point).
  509. ** Change that if you do not want to use C locales. (Code using this
  510. ** macro must include the header 'locale.h'.)
  511. */
  512. #if !defined(lua_getlocaledecpoint)
  513. #define lua_getlocaledecpoint() (localeconv()->decimal_point[0])
  514. #endif
  515. /*
  516. ** macros to improve jump prediction, used mostly for error handling
  517. ** and debug facilities. (Some macros in the Lua API use these macros.
  518. ** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your
  519. ** code.)
  520. */
  521. #if !defined(luai_likely)
  522. #if defined(__GNUC__) && !defined(LUA_NOBUILTIN)
  523. #define luai_likely(x) (__builtin_expect(((x) != 0), 1))
  524. #define luai_unlikely(x) (__builtin_expect(((x) != 0), 0))
  525. #else
  526. #define luai_likely(x) (x)
  527. #define luai_unlikely(x) (x)
  528. #endif
  529. #endif
  530. #if defined(LUA_CORE) || defined(LUA_LIB)
  531. /* shorter names for Lua's own use */
  532. #define l_likely(x) luai_likely(x)
  533. #define l_unlikely(x) luai_unlikely(x)
  534. #endif
  535. /* }================================================================== */
  536. /*
  537. ** {==================================================================
  538. ** Language Variations
  539. ** =====================================================================
  540. */
  541. /*
  542. @@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some
  543. ** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from
  544. ** numbers to strings. Define LUA_NOCVTS2N to turn off automatic
  545. ** coercion from strings to numbers.
  546. */
  547. /* #define LUA_NOCVTN2S */
  548. /* #define LUA_NOCVTS2N */
  549. /*
  550. @@ LUA_USE_APICHECK turns on several consistency checks on the C API.
  551. ** Define it as a help when debugging C code.
  552. */
  553. /* #define LUA_USE_APICHECK */
  554. /* }================================================================== */
  555. /*
  556. ** {==================================================================
  557. ** Macros that affect the API and must be stable (that is, must be the
  558. ** same when you compile Lua and when you compile code that links to
  559. ** Lua).
  560. ** =====================================================================
  561. */
  562. /*
  563. @@ LUAI_MAXSTACK limits the size of the Lua stack.
  564. ** CHANGE it if you need a different limit. This limit is arbitrary;
  565. ** its only purpose is to stop Lua from consuming unlimited stack
  566. ** space and to reserve some numbers for pseudo-indices.
  567. ** (It must fit into max(int)/2.)
  568. */
  569. #if 1000000 < (INT_MAX / 2)
  570. #define LUAI_MAXSTACK 1000000
  571. #else
  572. #define LUAI_MAXSTACK (INT_MAX / 2u)
  573. #endif
  574. /*
  575. @@ LUA_EXTRASPACE defines the size of a raw memory area associated with
  576. ** a Lua state with very fast access.
  577. ** CHANGE it if you need a different size.
  578. */
  579. #define LUA_EXTRASPACE (sizeof(void *))
  580. /*
  581. @@ LUA_IDSIZE gives the maximum size for the description of the source
  582. ** of a function in debug information.
  583. ** CHANGE it if you want a different size.
  584. */
  585. #define LUA_IDSIZE 60
  586. /*
  587. @@ LUAL_BUFFERSIZE is the initial buffer size used by the lauxlib
  588. ** buffer system.
  589. */
  590. #define LUAL_BUFFERSIZE ((int)(16 * sizeof(void*) * sizeof(lua_Number)))
  591. /*
  592. @@ LUAI_MAXALIGN defines fields that, when used in a union, ensure
  593. ** maximum alignment for the other items in that union.
  594. */
  595. #define LUAI_MAXALIGN lua_Number n; double u; void *s; lua_Integer i; long l
  596. /* }================================================================== */
  597. /* =================================================================== */
  598. /*
  599. ** Local configuration. You can use this space to add your redefinitions
  600. ** without modifying the main part of the file.
  601. */
  602. #endif