luaconf.h 22 KB

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  1. /*
  2. ** $Id: luaconf.h,v 1.101 2009/02/07 12:23:15 roberto Exp roberto $
  3. ** Configuration file for Lua
  4. ** See Copyright Notice in lua.h
  5. */
  6. #ifndef lconfig_h
  7. #define lconfig_h
  8. #include <limits.h>
  9. #include <stddef.h>
  10. /*
  11. ** ==================================================================
  12. ** Search for "@@" to find all configurable definitions.
  13. ** ===================================================================
  14. */
  15. /*
  16. @@ LUA_ANSI controls the use of non-ansi features.
  17. ** CHANGE it (define it) if you want Lua to avoid the use of any
  18. ** non-ansi feature or library.
  19. */
  20. #if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
  21. #define LUA_ANSI
  22. #endif
  23. #if !defined(LUA_ANSI) && defined(_WIN32)
  24. #define LUA_WIN
  25. #endif
  26. #if defined(LUA_WIN)
  27. #include <windows.h>
  28. #endif
  29. #if defined(LUA_USE_LINUX)
  30. #define LUA_USE_POSIX
  31. #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
  32. #define LUA_USE_READLINE /* needs some extra libraries */
  33. #endif
  34. #if defined(LUA_USE_MACOSX)
  35. #define LUA_USE_POSIX
  36. #define LUA_DL_DYLD /* does not need extra library */
  37. #endif
  38. /*
  39. @@ LUA_USE_POSIX includes all functionallity listed as X/Open System
  40. @* Interfaces Extension (XSI).
  41. ** CHANGE it (define it) if your system is XSI compatible.
  42. */
  43. #if defined(LUA_USE_POSIX)
  44. #define LUA_USE_MKSTEMP
  45. #define LUA_USE_ISATTY
  46. #define LUA_USE_POPEN
  47. #define LUA_USE_ULONGJMP
  48. #endif
  49. /*
  50. @@ LUA_PATH and LUA_CPATH are the names of the environment variables that
  51. @* Lua check to set its paths.
  52. @@ LUA_INIT is the name of the environment variable that Lua
  53. @* checks for initialization code.
  54. ** CHANGE them if you want different names.
  55. */
  56. #define LUA_PATH "LUA_PATH"
  57. #define LUA_CPATH "LUA_CPATH"
  58. #define LUA_INIT "LUA_INIT"
  59. /*
  60. @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
  61. @* Lua libraries.
  62. @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
  63. @* C libraries.
  64. ** CHANGE them if your machine has a non-conventional directory
  65. ** hierarchy or if you want to install your libraries in
  66. ** non-conventional directories.
  67. */
  68. #if defined(_WIN32)
  69. /*
  70. ** In Windows, any exclamation mark ('!') in the path is replaced by the
  71. ** path of the directory of the executable file of the current process.
  72. */
  73. #define LUA_LDIR "!\\lua\\"
  74. #define LUA_CDIR "!\\"
  75. #define LUA_PATH_DEFAULT \
  76. ".\\?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
  77. LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua"
  78. #define LUA_CPATH_DEFAULT \
  79. ".\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
  80. #else
  81. #define LUA_ROOT "/usr/local/"
  82. #define LUA_LDIR LUA_ROOT "share/lua/5.1/"
  83. #define LUA_CDIR LUA_ROOT "lib/lua/5.1/"
  84. #define LUA_PATH_DEFAULT \
  85. "./?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
  86. LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua"
  87. #define LUA_CPATH_DEFAULT \
  88. "./?.so;" LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
  89. #endif
  90. /*
  91. @@ LUA_DIRSEP is the directory separator (for submodules).
  92. ** CHANGE it if your machine does not use "/" as the directory separator
  93. ** and is not Windows. (On Windows Lua automatically uses "\".)
  94. */
  95. #if defined(_WIN32)
  96. #define LUA_DIRSEP "\\"
  97. #else
  98. #define LUA_DIRSEP "/"
  99. #endif
  100. /*
  101. @@ LUA_PATHSEP is the character that separates templates in a path.
  102. @@ LUA_PATH_MARK is the string that marks the substitution points in a
  103. @* template.
  104. @@ LUA_EXECDIR in a Windows path is replaced by the executable's
  105. @* directory.
  106. @@ LUA_IGMARK is a mark to ignore all before it when bulding the
  107. @* luaopen_ function name.
  108. ** CHANGE them if for some reason your system cannot use those
  109. ** characters. (E.g., if one of those characters is a common character
  110. ** in file/directory names.) Probably you do not need to change them.
  111. */
  112. #define LUA_PATHSEP ";"
  113. #define LUA_PATH_MARK "?"
  114. #define LUA_EXECDIR "!"
  115. #define LUA_IGMARK "-"
  116. /*
  117. @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
  118. ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
  119. ** machines, ptrdiff_t gives a good choice between int or long.)
  120. */
  121. #define LUA_INTEGER ptrdiff_t
  122. /*
  123. @@ LUA_API is a mark for all core API functions.
  124. @@ LUALIB_API is a mark for all standard library functions.
  125. ** CHANGE them if you need to define those functions in some special way.
  126. ** For instance, if you want to create one Windows DLL with the core and
  127. ** the libraries, you may want to use the following definition (define
  128. ** LUA_BUILD_AS_DLL to get it).
  129. */
  130. #if defined(LUA_BUILD_AS_DLL)
  131. #if defined(LUA_CORE) || defined(LUA_LIB)
  132. #define LUA_API __declspec(dllexport)
  133. #else
  134. #define LUA_API __declspec(dllimport)
  135. #endif
  136. #else
  137. #define LUA_API extern
  138. #endif
  139. /* more often than not the libs go together with the core */
  140. #define LUALIB_API LUA_API
  141. /*
  142. @@ LUAI_FUNC is a mark for all extern functions that are not to be
  143. @* exported to outside modules.
  144. @@ LUAI_DATA is a mark for all extern (const) variables that are not to
  145. @* be exported to outside modules.
  146. ** CHANGE them if you need to mark them in some special way. Elf/gcc
  147. ** (versions 3.2 and later) mark them as "hidden" to optimize access
  148. ** when Lua is compiled as a shared library. Not all elf targets support
  149. ** this attribute. Unfortunately, gcc does not offer a way to check
  150. ** whether the target offers that support, and those without support
  151. ** give a warning about it. To avoid these warnings, change to the
  152. ** default definition.
  153. */
  154. #if defined(luaall_c)
  155. #define LUAI_FUNC static
  156. #define LUAI_DATA /* empty */
  157. #elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
  158. defined(__ELF__)
  159. #define LUAI_FUNC __attribute__((visibility("hidden"))) extern
  160. #define LUAI_DATA LUAI_FUNC
  161. #else
  162. #define LUAI_FUNC extern
  163. #define LUAI_DATA extern
  164. #endif
  165. /*
  166. @@ LUA_QL describes how error messages quote program elements.
  167. ** CHANGE it if you want a different appearance.
  168. */
  169. #define LUA_QL(x) "'" x "'"
  170. #define LUA_QS LUA_QL("%s")
  171. /*
  172. @@ LUA_IDSIZE gives the maximum size for the description of the source
  173. @* of a function in debug information.
  174. ** CHANGE it if you want a different size.
  175. */
  176. #define LUA_IDSIZE 60
  177. /*
  178. @@ luai_writestring defines how 'print' prints its results.
  179. ** CHANGE it if your system does not have a useful stdout.
  180. */
  181. #define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
  182. /*
  183. ** {==================================================================
  184. ** Stand-alone configuration
  185. ** ===================================================================
  186. */
  187. #if defined(lua_c) || defined(luaall_c)
  188. /*
  189. @@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
  190. @* is, whether we're running lua interactively).
  191. ** CHANGE it if you have a better definition for non-POSIX/non-Windows
  192. ** systems.
  193. */
  194. #if defined(LUA_USE_ISATTY)
  195. #include <unistd.h>
  196. #define lua_stdin_is_tty() isatty(0)
  197. #elif defined(LUA_WIN)
  198. #include <io.h>
  199. #include <stdio.h>
  200. #define lua_stdin_is_tty() _isatty(_fileno(stdin))
  201. #else
  202. #define lua_stdin_is_tty() 1 /* assume stdin is a tty */
  203. #endif
  204. /*
  205. @@ LUA_PROMPT is the default prompt used by stand-alone Lua.
  206. @@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
  207. ** CHANGE them if you want different prompts. (You can also change the
  208. ** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
  209. */
  210. #define LUA_PROMPT "> "
  211. #define LUA_PROMPT2 ">> "
  212. /*
  213. @@ LUA_PROGNAME is the default name for the stand-alone Lua program.
  214. ** CHANGE it if your stand-alone interpreter has a different name and
  215. ** your system is not able to detect that name automatically.
  216. */
  217. #define LUA_PROGNAME "lua"
  218. /*
  219. @@ LUA_MAXINPUT is the maximum length for an input line in the
  220. @* stand-alone interpreter.
  221. ** CHANGE it if you need longer lines.
  222. */
  223. #define LUA_MAXINPUT 512
  224. /*
  225. @@ lua_readline defines how to show a prompt and then read a line from
  226. @* the standard input.
  227. @@ lua_saveline defines how to "save" a read line in a "history".
  228. @@ lua_freeline defines how to free a line read by lua_readline.
  229. ** CHANGE them if you want to improve/adapt this functionality.
  230. */
  231. #if defined(LUA_USE_READLINE)
  232. #include <stdio.h>
  233. #include <readline/readline.h>
  234. #include <readline/history.h>
  235. #define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
  236. #define lua_saveline(L,idx) \
  237. if (lua_objlen(L,idx) > 0) /* non-empty line? */ \
  238. add_history(lua_tostring(L, idx)); /* add it to history */
  239. #define lua_freeline(L,b) ((void)L, free(b))
  240. #else
  241. #define lua_readline(L,b,p) \
  242. ((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
  243. fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
  244. #define lua_saveline(L,idx) { (void)L; (void)idx; }
  245. #define lua_freeline(L,b) { (void)L; (void)b; }
  246. #endif
  247. #endif
  248. /* }================================================================== */
  249. /*
  250. @@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
  251. @* as a percentage.
  252. ** CHANGE it if you want the GC to run faster or slower (higher values
  253. ** mean larger pauses which mean slower collection.) You can also change
  254. ** this value dynamically.
  255. */
  256. #define LUAI_GCPAUSE 162 /* 162% (wait memory to double before next GC) */
  257. /*
  258. @@ LUAI_GCMUL defines the default speed of garbage collection relative to
  259. @* memory allocation as a percentage.
  260. ** CHANGE it if you want to change the granularity of the garbage
  261. ** collection. (Higher values mean coarser collections. 0 represents
  262. ** infinity, where each step performs a full collection.) You can also
  263. ** change this value dynamically.
  264. */
  265. #define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */
  266. /*
  267. ** {==================================================================
  268. ** Compatibility with previous versions
  269. ** ===================================================================
  270. */
  271. /*
  272. @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
  273. ** CHANGE it (undefine it) if as soon as you rewrite all calls 'log10(x)'
  274. ** as 'log(x, 10)'
  275. */
  276. #define LUA_COMPAT_LOG10
  277. /*
  278. @@ LUA_COMPAT_API includes some macros and functions that supply some
  279. @* compatibility with previous versions.
  280. ** CHANGE it (undefine it) if you do not need these compatibility facilities.
  281. */
  282. #define LUA_COMPAT_API
  283. /*
  284. @@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
  285. ** CHANGE it to undefined as soon as your programs use only '...' to
  286. ** access vararg parameters (instead of the old 'arg' table).
  287. */
  288. #define LUA_COMPAT_VARARG
  289. /*
  290. @@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
  291. ** CHANGE it to undefined as soon as you rename 'string.gfind' to
  292. ** 'string.gmatch'.
  293. */
  294. #define LUA_COMPAT_GFIND
  295. /*
  296. @@ LUA_COMPAT_DEBUGLIB controls compatibility with preloading
  297. @* the debug library.
  298. ** CHANGE it to undefined as soon as you add 'require"debug"' everywhere
  299. ** you need the debug library.
  300. */
  301. #define LUA_COMPAT_DEBUGLIB
  302. /* }================================================================== */
  303. /*
  304. @@ luai_apicheck is the assert macro used by the Lua-C API.
  305. ** CHANGE luai_apicheck if you want Lua to perform some checks in the
  306. ** parameters it gets from API calls. This may slow down the interpreter
  307. ** a bit, but may be quite useful when debugging C code that interfaces
  308. ** with Lua. A useful redefinition is to use assert.h.
  309. */
  310. #if defined(LUA_USE_APICHECK)
  311. #include <assert.h>
  312. #define luai_apicheck(L,o) { (void)L; assert(o); }
  313. #else
  314. #define luai_apicheck(L,o) { (void)L; }
  315. #endif
  316. /*
  317. @@ LUAI_BITSINT defines the number of bits in an int.
  318. ** CHANGE here if Lua cannot automatically detect the number of bits of
  319. ** your machine. Probably you do not need to change this.
  320. */
  321. /* avoid overflows in comparison */
  322. #if INT_MAX-20 < 32760
  323. #define LUAI_BITSINT 16
  324. #elif INT_MAX > 2147483640L
  325. /* int has at least 32 bits */
  326. #define LUAI_BITSINT 32
  327. #else
  328. #error "you must define LUA_BITSINT with number of bits in an integer"
  329. #endif
  330. /*
  331. @@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
  332. @@ LUAI_INT32 is an signed integer with at least 32 bits.
  333. @@ LUAI_UMEM is an unsigned integer big enough to count the total
  334. @* memory used by Lua.
  335. @@ LUAI_MEM is a signed integer big enough to count the total memory
  336. @* used by Lua.
  337. ** CHANGE here if for some weird reason the default definitions are not
  338. ** good enough for your machine. (The definitions in the 'else'
  339. ** part always works, but may waste space on machines with 64-bit
  340. ** longs.) Probably you do not need to change this.
  341. */
  342. #if LUAI_BITSINT >= 32
  343. #define LUAI_UINT32 unsigned int
  344. #define LUAI_UMEM size_t
  345. #define LUAI_MEM ptrdiff_t
  346. #else
  347. /* 16-bit ints */
  348. #define LUAI_UINT32 unsigned long
  349. #define LUAI_UMEM unsigned long
  350. #define LUAI_MEM long
  351. #endif
  352. /*
  353. @@ LUAI_MAXCALLS limits the number of nested calls.
  354. ** CHANGE it if you need really deep recursive calls. This limit is
  355. ** arbitrary; its only purpose is to stop infinite recursion before
  356. ** exhausting memory.
  357. */
  358. #define LUAI_MAXCALLS 20000
  359. /*
  360. @@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
  361. @* can use.
  362. ** CHANGE it if you need a different limit. This limit is arbitrary;
  363. ** its only purpose is to stop C functions to consume unlimited stack
  364. ** space.
  365. */
  366. /* life is simpler if stack size fits in an int (16 is an estimate
  367. for the size of a Lua value) */
  368. #if SHRT_MAX < (INT_MAX / 16)
  369. #define LUAI_MCS_AUX SHRT_MAX
  370. #else
  371. #define LUAI_MCS_AUX (INT_MAX / 16)
  372. #endif
  373. /* reserve some space for pseudo-indices */
  374. #define LUAI_MAXCSTACK (LUAI_MCS_AUX - 1000)
  375. /*
  376. ** {==================================================================
  377. ** CHANGE (to smaller values) the following definitions if your system
  378. ** has a small C stack. (Or you may want to change them to larger
  379. ** values if your system has a large C stack and these limits are
  380. ** too rigid for you.) Some of these constants control the size of
  381. ** stack-allocated arrays used by the compiler or the interpreter, while
  382. ** others limit the maximum number of recursive calls that the compiler
  383. ** or the interpreter can perform. Values too large may cause a C stack
  384. ** overflow for some forms of deep constructs.
  385. ** ===================================================================
  386. */
  387. /*
  388. @@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
  389. @* syntactical nested non-terminals in a program.
  390. */
  391. #define LUAI_MAXCCALLS 200
  392. /*
  393. @@ LUAI_MAXVARS is the maximum number of local variables per function
  394. @* (must be smaller than 250).
  395. */
  396. #define LUAI_MAXVARS 200
  397. /*
  398. @@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
  399. @* (must be smaller than 250).
  400. */
  401. #define LUAI_MAXUPVALUES 60
  402. /*
  403. @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
  404. */
  405. #define LUAL_BUFFERSIZE BUFSIZ
  406. /* }================================================================== */
  407. /*
  408. ** {==================================================================
  409. @@ LUA_NUMBER is the type of numbers in Lua.
  410. ** CHANGE the following definitions only if you want to build Lua
  411. ** with a number type different from double. You may also need to
  412. ** change lua_number2int & lua_number2integer.
  413. ** ===================================================================
  414. */
  415. #define LUA_NUMBER_DOUBLE
  416. #define LUA_NUMBER double
  417. /*
  418. @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
  419. @* over a number.
  420. */
  421. #define LUAI_UACNUMBER double
  422. /*
  423. @@ LUA_NUMBER_SCAN is the format for reading numbers.
  424. @@ LUA_NUMBER_FMT is the format for writing numbers.
  425. @@ lua_number2str converts a number to a string.
  426. @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
  427. @@ lua_str2number converts a string to a number.
  428. */
  429. #define LUA_NUMBER_SCAN "%lf"
  430. #define LUA_NUMBER_FMT "%.14g"
  431. #define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
  432. #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
  433. #define lua_str2number(s,p) strtod((s), (p))
  434. /*
  435. @@ The luai_num* macros define the primitive operations over numbers.
  436. */
  437. #if defined(LUA_CORE)
  438. #include <math.h>
  439. #define luai_numadd(L,a,b) ((a)+(b))
  440. #define luai_numsub(L,a,b) ((a)-(b))
  441. #define luai_nummul(L,a,b) ((a)*(b))
  442. #define luai_numdiv(L,a,b) ((a)/(b))
  443. #define luai_nummod(L,a,b) ((a) - floor((a)/(b))*(b))
  444. #define luai_numpow(L,a,b) (pow(a,b))
  445. #define luai_numunm(L,a) (-(a))
  446. #define luai_numeq(a,b) ((a)==(b))
  447. #define luai_numlt(L,a,b) ((a)<(b))
  448. #define luai_numle(L,a,b) ((a)<=(b))
  449. #define luai_numisnan(L,a) (!luai_numeq((a), (a)))
  450. #endif
  451. /*
  452. @@ lua_number2int is a macro to convert lua_Number to int.
  453. @@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
  454. ** CHANGE them if you know a faster way to convert a lua_Number to
  455. ** int (with any rounding method and without throwing errors) in your
  456. ** system. In Pentium machines, a naive typecast from double to int
  457. ** in C is extremely slow, so any alternative is worth trying.
  458. */
  459. /* On a Pentium, resort to a trick */
  460. #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \
  461. (defined(__i386) || defined (_M_IX86) || defined(__i386__))
  462. /* On a Microsoft compiler, use assembler */
  463. #if defined(_MSC_VER)
  464. #define lua_number2int(i,d) __asm fld d __asm fistp i
  465. #define lua_number2integer(i,n) lua_number2int(i, n)
  466. /* the next trick should work on any Pentium, but sometimes clashes
  467. with a DirectX idiosyncrasy */
  468. #else
  469. union luai_Cast { double l_d; long l_l; };
  470. #define lua_number2int(i,d) \
  471. { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
  472. #define lua_number2integer(i,n) lua_number2int(i, n)
  473. #endif
  474. /* this option always works, but may be slow */
  475. #else
  476. #define lua_number2int(i,d) ((i)=(int)(d))
  477. #define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
  478. #endif
  479. /* }================================================================== */
  480. /*
  481. @@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
  482. ** CHANGE it if your system requires alignments larger than double. (For
  483. ** instance, if your system supports long doubles and they must be
  484. ** aligned in 16-byte boundaries, then you should add long double in the
  485. ** union.) Probably you do not need to change this.
  486. */
  487. #define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; }
  488. /*
  489. @@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
  490. ** CHANGE them if you prefer to use longjmp/setjmp even with C++
  491. ** or if want/don't to use _longjmp/_setjmp instead of regular
  492. ** longjmp/setjmp. By default, Lua handles errors with exceptions when
  493. ** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
  494. ** and with longjmp/setjmp otherwise.
  495. */
  496. #if defined(__cplusplus)
  497. /* C++ exceptions */
  498. #define LUAI_THROW(L,c) throw(c)
  499. #define LUAI_TRY(L,c,a) try { a } catch(...) \
  500. { if ((c)->status == 0) (c)->status = -1; }
  501. #define luai_jmpbuf int /* dummy variable */
  502. #elif defined(LUA_USE_ULONGJMP)
  503. /* in Unix, try _longjmp/_setjmp (more efficient) */
  504. #define LUAI_THROW(L,c) _longjmp((c)->b, 1)
  505. #define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
  506. #define luai_jmpbuf jmp_buf
  507. #else
  508. /* default handling with long jumps */
  509. #define LUAI_THROW(L,c) longjmp((c)->b, 1)
  510. #define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
  511. #define luai_jmpbuf jmp_buf
  512. #endif
  513. /*
  514. @@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
  515. @* can do during pattern-matching.
  516. ** CHANGE it if you need more captures. This limit is arbitrary.
  517. */
  518. #define LUA_MAXCAPTURES 32
  519. /*
  520. @@ lua_tmpnam is the function that the OS library uses to create a
  521. @* temporary name.
  522. @@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
  523. ** CHANGE them if you have an alternative to tmpnam (which is considered
  524. ** insecure) or if you want the original tmpnam anyway. By default, Lua
  525. ** uses tmpnam except when POSIX is available, where it uses mkstemp.
  526. */
  527. #if defined(loslib_c) || defined(luaall_c)
  528. #if defined(LUA_USE_MKSTEMP)
  529. #include <unistd.h>
  530. #define LUA_TMPNAMBUFSIZE 32
  531. #define lua_tmpnam(b,e) { \
  532. strcpy(b, "/tmp/lua_XXXXXX"); \
  533. e = mkstemp(b); \
  534. if (e != -1) close(e); \
  535. e = (e == -1); }
  536. #else
  537. #define LUA_TMPNAMBUFSIZE L_tmpnam
  538. #define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
  539. #endif
  540. #endif
  541. /*
  542. @@ LUA_STRFTIMEOPTIONS is the list of valid conversion specifier
  543. @* characters for the 'strftime' function;
  544. @@ LUA_STRFTIMEPREFIX is the list of valid modifiers for
  545. @* that function.
  546. ** CHANGE them if you want to use non-ansi options specific to your system.
  547. */
  548. #define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYz%"
  549. #define LUA_STRFTIMEPREFIX ""
  550. /*
  551. @@ lua_popen spawns a new process connected to the current one through
  552. @* the file streams.
  553. ** CHANGE it if you have a way to implement it in your system.
  554. */
  555. #if defined(LUA_USE_POPEN)
  556. #define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m))
  557. #define lua_pclose(L,file) ((void)L, (pclose(file) != -1))
  558. #elif defined(LUA_WIN)
  559. #define lua_popen(L,c,m) ((void)L, _popen(c,m))
  560. #define lua_pclose(L,file) ((void)L, (_pclose(file) != -1))
  561. #else
  562. #define lua_popen(L,c,m) ((void)((void)c, m), \
  563. luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
  564. #define lua_pclose(L,file) ((void)((void)L, file), 0)
  565. #endif
  566. /*
  567. @@ LUA_DL_* define which dynamic-library system Lua should use.
  568. ** CHANGE here if Lua has problems choosing the appropriate
  569. ** dynamic-library system for your platform (either Windows' DLL, Mac's
  570. ** dyld, or Unix's dlopen). If your system is some kind of Unix, there
  571. ** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
  572. ** it. To use dlopen you also need to adapt the src/Makefile (probably
  573. ** adding -ldl to the linker options), so Lua does not select it
  574. ** automatically. (When you change the makefile to add -ldl, you must
  575. ** also add -DLUA_USE_DLOPEN.)
  576. ** If you do not want any kind of dynamic library, undefine all these
  577. ** options.
  578. ** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
  579. */
  580. #if defined(LUA_USE_DLOPEN)
  581. #define LUA_DL_DLOPEN
  582. #endif
  583. #if defined(LUA_WIN)
  584. #define LUA_DL_DLL
  585. #endif
  586. /*
  587. @@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
  588. @* (the data goes just *before* the lua_State pointer).
  589. ** CHANGE (define) this if you really need that. This value must be
  590. ** a multiple of the maximum alignment required for your machine.
  591. */
  592. #define LUAI_EXTRASPACE 0
  593. /*
  594. @@ luai_userstate* allow user-specific actions on threads.
  595. ** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
  596. ** extra when a thread is created/deleted/resumed/yielded.
  597. */
  598. #define luai_userstateopen(L) ((void)L)
  599. #define luai_userstateclose(L) ((void)L)
  600. #define luai_userstatethread(L,L1) ((void)L)
  601. #define luai_userstatefree(L) ((void)L)
  602. #define luai_userstateresume(L,n) ((void)L)
  603. #define luai_userstateyield(L,n) ((void)L)
  604. /*
  605. @@ LUA_INTFRMLEN is the length modifier for integer conversions
  606. @* in 'string.format'.
  607. @@ LUA_INTFRM_T is the integer type correspoding to the previous length
  608. @* modifier.
  609. ** CHANGE them if your system supports long long or does not support long.
  610. */
  611. #if defined(LUA_USELONGLONG)
  612. #define LUA_INTFRMLEN "ll"
  613. #define LUA_INTFRM_T long long
  614. #else
  615. #define LUA_INTFRMLEN "l"
  616. #define LUA_INTFRM_T long
  617. #endif
  618. /* =================================================================== */
  619. /*
  620. ** Local configuration. You can use this space to add your redefinitions
  621. ** without modifying the main part of the file.
  622. */
  623. #endif