d1/dd5/luaconf_8h_source.html

/*

** $Id$

** Configuration file for Lua

** See Copyright Notice in lua.h

*/


#ifndef lconfig_h

#define lconfig_h


#include <limits.h>

#include <stddef.h>


/*

** ==================================================================

** Search for "@@" to find all configurable definitions.

** ===================================================================

*/


/*

@@ LUA_ANSI controls the use of non-ansi features.

** CHANGE it (define it) if you want Lua to avoid the use of any

** non-ansi feature or library.

*/

#if defined(__STRICT_ANSI__)

#define LUA_ANSI

#endif


#if !defined(LUA_ANSI) && defined(_WIN32)

#define LUA_WIN

#endif


#if defined(LUA_USE_LINUX)

#define LUA_USE_POSIX

#define LUA_USE_DLOPEN      /* needs an extra library: -ldl */

#define LUA_USE_READLINE    /* needs some extra libraries */

#endif


#if defined(LUA_USE_MACOSX)

#define LUA_USE_POSIX

#define LUA_DL_DYLD     /* does not need extra library */

#endif


/*

@@ LUA_USE_POSIX includes all functionallity listed as X/Open System

@* Interfaces Extension (XSI).

** CHANGE it (define it) if your system is XSI compatible.

*/

#if defined(LUA_USE_POSIX)

#define LUA_USE_MKSTEMP

#define LUA_USE_ISATTY

#define LUA_USE_POPEN

#define LUA_USE_ULONGJMP

#endif


/*

@@ LUA_PATH and LUA_CPATH are the names of the environment variables that

@* Lua check to set its paths.

@@ LUA_INIT is the name of the environment variable that Lua

@* checks for initialization code.

** CHANGE them if you want different names.

*/

#define LUA_PATH        "LUA_PATH"

#define LUA_CPATH       "LUA_CPATH"

#define LUA_INIT    "LUA_INIT"


/*

@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for

@* Lua libraries.

@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for

@* C libraries.

** CHANGE them if your machine has a non-conventional directory

** hierarchy or if you want to install your libraries in

** non-conventional directories.

*/

#if defined(_WIN32)

/*

** In Windows, any exclamation mark ('!') in the path is replaced by the

** path of the directory of the executable file of the current process.

*/

#define LUA_LDIR    "!\\lua\\"

#define LUA_CDIR    "!\\"

#define LUA_PATH_DEFAULT  \

        ".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \

                     LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"

#define LUA_CPATH_DEFAULT \

    ".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"


#else

#define LUA_ROOT    "/usr/local/"

#define LUA_LDIR    LUA_ROOT "share/lua/5.1/"

#define LUA_CDIR    LUA_ROOT "lib/lua/5.1/"

#define LUA_PATH_DEFAULT  \

        "./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \

                    LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"

#define LUA_CPATH_DEFAULT \

    "./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"

#endif


/*

@@ LUA_DIRSEP is the directory separator (for submodules).

** CHANGE it if your machine does not use "/" as the directory separator

** and is not Windows. (On Windows Lua automatically uses "\".)

*/

#if defined(_WIN32)

#define LUA_DIRSEP  "\\"

#else

#define LUA_DIRSEP  "/"

#endif


/*

@@ LUA_PATHSEP is the character that separates templates in a path.

@@ LUA_PATH_MARK is the string that marks the substitution points in a

@* template.

@@ LUA_EXECDIR in a Windows path is replaced by the executable's

@* directory.

@@ LUA_IGMARK is a mark to ignore all before it when bulding the

@* luaopen_ function name.

** CHANGE them if for some reason your system cannot use those

** characters. (E.g., if one of those characters is a common character

** in file/directory names.) Probably you do not need to change them.

*/

#define LUA_PATHSEP ";"

#define LUA_PATH_MARK   "?"

#define LUA_EXECDIR "!"

#define LUA_IGMARK  "-"


/*

@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.

** CHANGE that if ptrdiff_t is not adequate on your machine. (On most

** machines, ptrdiff_t gives a good choice between int or long.)

*/

#define LUA_INTEGER ptrdiff_t


/*

@@ LUA_API is a mark for all core API functions.

@@ LUALIB_API is a mark for all standard library functions.

** CHANGE them if you need to define those functions in some special way.

** For instance, if you want to create one Windows DLL with the core and

** the libraries, you may want to use the following definition (define

** LUA_BUILD_AS_DLL to get it).

*/

#if defined(LUA_BUILD_AS_DLL)


#if defined(LUA_CORE) || defined(LUA_LIB)

#define LUA_API __declspec(dllexport)

#else

#define LUA_API __declspec(dllimport)

#endif


#else


#define LUA_API     extern


#endif


/* more often than not the libs go together with the core */

#define LUALIB_API  LUA_API


/*

@@ LUAI_FUNC is a mark for all extern functions that are not to be

@* exported to outside modules.

@@ LUAI_DATA is a mark for all extern (const) variables that are not to

@* be exported to outside modules.

** CHANGE them if you need to mark them in some special way. Elf/gcc

** (versions 3.2 and later) mark them as "hidden" to optimize access

** when Lua is compiled as a shared library.

*/

#if defined(luaall_c)

#define LUAI_FUNC   static

#define LUAI_DATA   /* empty */


#elif defined(__GNUC__) && defined(__ELF__)

#define LUAI_FUNC   __attribute__((visibility("hidden"))) extern

#define LUAI_DATA   LUAI_FUNC


#else

#define LUAI_FUNC   extern

#define LUAI_DATA   extern

#endif


/*

@@ LUA_QL describes how error messages quote program elements.

** CHANGE it if you want a different appearance.

*/

#define LUA_QL(x)   "'" x "'"

#define LUA_QS      LUA_QL("%s")


/*

@@ LUA_IDSIZE gives the maximum size for the description of the source

@* of a function in debug information.

** CHANGE it if you want a different size.

*/

#define LUA_IDSIZE  60


/*

** {==================================================================

** Stand-alone configuration

** ===================================================================

*/


#if defined(lua_c) || defined(luaall_c)


/*

@@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that

@* is, whether we're running lua interactively).

** CHANGE it if you have a better definition for non-POSIX/non-Windows

** systems.

*/

#if defined(LUA_USE_ISATTY)

#include <unistd.h>

#define lua_stdin_is_tty()  isatty(0)

#elif defined(LUA_WIN)

#include <io.h>

#include <stdio.h>

#define lua_stdin_is_tty()  _isatty(_fileno(stdin))

#else

#define lua_stdin_is_tty()  1  /* assume stdin is a tty */

#endif


/*

@@ LUA_PROMPT is the default prompt used by stand-alone Lua.

@@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.

** CHANGE them if you want different prompts. (You can also change the

** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)

*/

#define LUA_PROMPT      "> "

#define LUA_PROMPT2     ">> "


/*

@@ LUA_PROGNAME is the default name for the stand-alone Lua program.

** CHANGE it if your stand-alone interpreter has a different name and

** your system is not able to detect that name automatically.

*/

#define LUA_PROGNAME        "lua"


/*

@@ LUA_MAXINPUT is the maximum length for an input line in the

@* stand-alone interpreter.

** CHANGE it if you need longer lines.

*/

#define LUA_MAXINPUT    512


/*

@@ lua_readline defines how to show a prompt and then read a line from

@* the standard input.

@@ lua_saveline defines how to "save" a read line in a "history".

@@ lua_freeline defines how to free a line read by lua_readline.

** CHANGE them if you want to improve this functionality (e.g., by using

** GNU readline and history facilities).

*/

#if defined(LUA_USE_READLINE)

#include <stdio.h>

#include <readline/readline.h>

#include <readline/history.h>

#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)

#define lua_saveline(L,idx) \

    if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \

      add_history(lua_tostring(L, idx));  /* add it to history */

#define lua_freeline(L,b)   ((void)L, free(b))

#else

#define lua_readline(L,b,p) \

    ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \

    fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */

#define lua_saveline(L,idx) { (void)L; (void)idx; }

#define lua_freeline(L,b)   { (void)L; (void)b; }

#endif


#endif


/* }================================================================== */


/*

@@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles

@* as a percentage.

** CHANGE it if you want the GC to run faster or slower (higher values

** mean larger pauses which mean slower collection.) You can also change

** this value dynamically.

*/

#define LUAI_GCPAUSE    200  /* 200% (wait memory to double before next GC) */


/*

@@ LUAI_GCMUL defines the default speed of garbage collection relative to

@* memory allocation as a percentage.

** CHANGE it if you want to change the granularity of the garbage

** collection. (Higher values mean coarser collections. 0 represents

** infinity, where each step performs a full collection.) You can also

** change this value dynamically.

*/

#define LUAI_GCMUL  200 /* GC runs 'twice the speed' of memory allocation */


/*

@@ LUA_COMPAT_GETN controls compatibility with old getn behavior.

** CHANGE it (define it) if you want exact compatibility with the

** behavior of setn/getn in Lua 5.0.

*/

#define LUA_COMPAT_GETN /* BS25 #undef LUA_COMPAT_GETN */


/*

@@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.

** CHANGE it to undefined as soon as you do not need a global 'loadlib'

** function (the function is still available as 'package.loadlib').

*/

#undef LUA_COMPAT_LOADLIB


/*

@@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.

** CHANGE it to undefined as soon as your programs use only '...' to

** access vararg parameters (instead of the old 'arg' table).

*/

#define LUA_COMPAT_VARARG


/*

@@ LUA_COMPAT_MOD controls compatibility with old math.mod function.

** CHANGE it to undefined as soon as your programs use 'math.fmod' or

** the new '%' operator instead of 'math.mod'.

*/

#define LUA_COMPAT_MOD


/*

@@ LUA_COMPAT_LSTR controls compatibility with old long string nesting

@* facility.

** CHANGE it to 2 if you want the old behavior, or undefine it to turn

** off the advisory error when nesting [[...]].

*/

#define LUA_COMPAT_LSTR     1


/*

@@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.

** CHANGE it to undefined as soon as you rename 'string.gfind' to

** 'string.gmatch'.

*/

#define LUA_COMPAT_GFIND


/*

@@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'

@* behavior.

** CHANGE it to undefined as soon as you replace to 'luaL_register'

** your uses of 'luaL_openlib'

*/

#define LUA_COMPAT_OPENLIB


/*

@@ luai_apicheck is the assert macro used by the Lua-C API.

** CHANGE luai_apicheck if you want Lua to perform some checks in the

** parameters it gets from API calls. This may slow down the interpreter

** a bit, but may be quite useful when debugging C code that interfaces

** with Lua. A useful redefinition is to use assert.h.

*/

#if defined(LUA_USE_APICHECK)

#include <assert.h>

#define luai_apicheck(L,o)  { (void)L; assert(o); }

#else

#define luai_apicheck(L,o)  { (void)L; }

#endif


/*

@@ LUAI_BITSINT defines the number of bits in an int.

** CHANGE here if Lua cannot automatically detect the number of bits of

** your machine. Probably you do not need to change this.

*/

/* avoid overflows in comparison */

#if INT_MAX-20 < 32760

#define LUAI_BITSINT    16

#elif INT_MAX > 2147483640L

/* int has at least 32 bits */

#define LUAI_BITSINT    32

#else

#error "you must define LUA_BITSINT with number of bits in an integer"

#endif


/*

@@ LUAI_UINT32 is an unsigned integer with at least 32 bits.

@@ LUAI_INT32 is an signed integer with at least 32 bits.

@@ LUAI_UMEM is an unsigned integer big enough to count the total

@* memory used by Lua.

@@ LUAI_MEM is a signed integer big enough to count the total memory

@* used by Lua.

** CHANGE here if for some weird reason the default definitions are not

** good enough for your machine. (The definitions in the 'else'

** part always works, but may waste space on machines with 64-bit

** longs.) Probably you do not need to change this.

*/

#if LUAI_BITSINT >= 32

#define LUAI_UINT32 unsigned int

#define LUAI_INT32  int

#define LUAI_MAXINT32   INT_MAX

#define LUAI_UMEM   size_t

#define LUAI_MEM    ptrdiff_t

#else

/* 16-bit ints */

#define LUAI_UINT32 unsigned long

#define LUAI_INT32  long

#define LUAI_MAXINT32   LONG_MAX

#define LUAI_UMEM   unsigned long

#define LUAI_MEM    long

#endif


/*

@@ LUAI_MAXCALLS limits the number of nested calls.

** CHANGE it if you need really deep recursive calls. This limit is

** arbitrary; its only purpose is to stop infinite recursion before

** exhausting memory.

*/

#define LUAI_MAXCALLS   20000


/*

@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function

@* can use.

** CHANGE it if you need lots of (Lua) stack space for your C

** functions. This limit is arbitrary; its only purpose is to stop C

** functions to consume unlimited stack space. (must be smaller than

** -LUA_REGISTRYINDEX)

*/

#define LUAI_MAXCSTACK  8000


/*

** {==================================================================

** CHANGE (to smaller values) the following definitions if your system

** has a small C stack. (Or you may want to change them to larger

** values if your system has a large C stack and these limits are

** too rigid for you.) Some of these constants control the size of

** stack-allocated arrays used by the compiler or the interpreter, while

** others limit the maximum number of recursive calls that the compiler

** or the interpreter can perform. Values too large may cause a C stack

** overflow for some forms of deep constructs.

** ===================================================================

*/


/*

@@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and

@* syntactical nested non-terminals in a program.

*/

#define LUAI_MAXCCALLS      200


/*

@@ LUAI_MAXVARS is the maximum number of local variables per function

@* (must be smaller than 250).

*/

#define LUAI_MAXVARS        200


/*

@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function

@* (must be smaller than 250).

*/

#define LUAI_MAXUPVALUES    60


/*

@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.

*/

#define LUAL_BUFFERSIZE     BUFSIZ


/* }================================================================== */


/*

** {==================================================================

@@ LUA_NUMBER is the type of numbers in Lua.

** CHANGE the following definitions only if you want to build Lua

** with a number type different from double. You may also need to

** change lua_number2int & lua_number2integer.

** ===================================================================

*/


#define LUA_NUMBER_DOUBLE

#define LUA_NUMBER  double


/*

@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'

@* over a number.

*/

#define LUAI_UACNUMBER  double


/*

@@ LUA_NUMBER_SCAN is the format for reading numbers.

@@ LUA_NUMBER_FMT is the format for writing numbers.

@@ lua_number2str converts a number to a string.

@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.

@@ lua_str2number converts a string to a number.

*/

#define LUA_NUMBER_SCAN     "%lf"

#define LUA_NUMBER_FMT      "%.14g"

#define lua_number2str(s,n) snprintf((s), LUAI_MAXNUMBER2STR, LUA_NUMBER_FMT, (n))

#define LUAI_MAXNUMBER2STR  32 /* 16 digits, sign, point, and \0 */

#define lua_str2number(s,p) strtod((s), (p))


/*

@@ The luai_num* macros define the primitive operations over numbers.

*/

#if defined(LUA_CORE)

#include <math.h>

#define luai_numadd(a,b)    ((a)+(b))

#define luai_numsub(a,b)    ((a)-(b))

#define luai_nummul(a,b)    ((a)*(b))

#define luai_numdiv(a,b)    ((a)/(b))

#define luai_nummod(a,b)    ((a) - floor((a)/(b))*(b))

#define luai_numpow(a,b)    (pow(a,b))

#define luai_numunm(a)      (-(a))

#define luai_numeq(a,b)     ((a)==(b))

#define luai_numlt(a,b)     ((a)<(b))

#define luai_numle(a,b)     ((a)<=(b))

#define luai_numisnan(a)    (!luai_numeq((a), (a)))

#endif


/*

@@ lua_number2int is a macro to convert lua_Number to int.

@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.

** CHANGE them if you know a faster way to convert a lua_Number to

** int (with any rounding method and without throwing errors) in your

** system. In Pentium machines, a naive typecast from double to int

** in C is extremely slow, so any alternative is worth trying.

*/


/* On a Pentium, resort to a trick */

#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \

    (defined(__i386) || defined (_M_IX86) || defined(__i386__))


/* On a Microsoft compiler, use assembler */

#if defined(_MSC_VER)


#define lua_number2int(i,d)   __asm fld d   __asm fistp i

#define lua_number2integer(i,n)     lua_number2int(i, n)


/* the next trick should work on any Pentium, but sometimes clashes

   with a DirectX idiosyncrasy */

#else


union luai_Cast { double l_d; long l_l; };

#define lua_number2int(i,d) \

  { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }

#define lua_number2integer(i,n)     lua_number2int(i, n)


#endif


/* this option always works, but may be slow */

#else

#define lua_number2int(i,d) ((i)=(int)(d))

#define lua_number2integer(i,d) ((i)=(lua_Integer)(d))


#endif


/* }================================================================== */


/*

@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.

** CHANGE it if your system requires alignments larger than double. (For

** instance, if your system supports long doubles and they must be

** aligned in 16-byte boundaries, then you should add long double in the

** union.) Probably you do not need to change this.

*/

#define LUAI_USER_ALIGNMENT_T   union { double u; void *s; long l; }


/*

@@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.

** CHANGE them if you prefer to use longjmp/setjmp even with C++

** or if want/don't to use _longjmp/_setjmp instead of regular

** longjmp/setjmp. By default, Lua handles errors with exceptions when

** compiling as C++ code, with _longjmp/_setjmp when asked to use them,

** and with longjmp/setjmp otherwise.

*/

#if 0  /* defined(__cplusplus) */

/* C++ exceptions */

#define LUAI_THROW(L,c) throw(c)

#define LUAI_TRY(L,c,a) try { a } catch(...) \

    { if ((c)->status == 0) (c)->status = -1; }

#define luai_jmpbuf int  /* dummy variable */


#elif defined(LUA_USE_ULONGJMP)

/* in Unix, try _longjmp/_setjmp (more efficient) */

#define LUAI_THROW(L,c) _longjmp((c)->b, 1)

#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }

#define luai_jmpbuf jmp_buf


#else

/* default handling with long jumps */

#define LUAI_THROW(L,c) longjmp((c)->b, 1)

#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }

#define luai_jmpbuf jmp_buf


#endif


/*

@@ LUA_MAXCAPTURES is the maximum number of captures that a pattern

@* can do during pattern-matching.

** CHANGE it if you need more captures. This limit is arbitrary.

*/

#define LUA_MAXCAPTURES     32


/*

@@ lua_popen spawns a new process connected to the current one through

@* the file streams.

** CHANGE it if you have a way to implement it in your system.

*/

#define lua_popen(L,c,m)    ((void)((void)c, m),  \

        luaL_error(L, LUA_QL("popen") " not supported"), (FILE *)0)

#define lua_pclose(L,file)      ((void)((void)L, file), 0)


/*

@@ LUA_DL_* define which dynamic-library system Lua should use.

** CHANGE here if Lua has problems choosing the appropriate

** dynamic-library system for your platform (either Windows' DLL, Mac's

** dyld, or Unix's dlopen). If your system is some kind of Unix, there

** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for

** it.  To use dlopen you also need to adapt the src/Makefile (probably

** adding -ldl to the linker options), so Lua does not select it

** automatically.  (When you change the makefile to add -ldl, you must

** also add -DLUA_USE_DLOPEN.)

** If you do not want any kind of dynamic library, undefine all these

** options.

** By default, _WIN32 gets LUA_DL_DLL and macOS gets LUA_DL_DYLD.

*/

#if defined(LUA_USE_DLOPEN)

#define LUA_DL_DLOPEN

#endif


#if defined(LUA_WIN)

#define LUA_DL_DLL

#endif


/*

@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State

@* (the data goes just *before* the lua_State pointer).

** CHANGE (define) this if you really need that. This value must be

** a multiple of the maximum alignment required for your machine.

*/

#define LUAI_EXTRASPACE     0


/*

@@ luai_userstate* allow user-specific actions on threads.

** CHANGE them if you defined LUAI_EXTRASPACE and need to do something

** extra when a thread is created/deleted/resumed/yielded.

*/

#define luai_userstateopen(L)       ((void)L)

#define luai_userstateclose(L)      ((void)L)

#define luai_userstatethread(L,L1)  ((void)L)

#define luai_userstatefree(L)       ((void)L)

#define luai_userstateresume(L,n)   ((void)L)

#define luai_userstateyield(L,n)    ((void)L)


/*

@@ LUA_INTFRMLEN is the length modifier for integer conversions

@* in 'string.format'.

@@ LUA_INTFRM_T is the integer type correspoding to the previous length

@* modifier.

** CHANGE them if your system supports long long or does not support long.

*/


#if defined(LUA_USELONGLONG)


#define LUA_INTFRMLEN       "ll"

#define LUA_INTFRM_T        long long


#else


#define LUA_INTFRMLEN       "l"

#define LUA_INTFRM_T        long


#endif


/* =================================================================== */


/*

** Local configuration. You can use this space to add your redefinitions

** without modifying the main part of the file.

*/


#endif