lua/luaconf.h

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/*
** $Id: luaconf.h,v 1.185 2013/06/25 19:04:40 roberto Exp roberto $
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** Configuration file for Lua
** See Copyright Notice in lua.h
*/
#ifndef lconfig_h
#define lconfig_h
#include <limits.h>
#include <stddef.h>
/*
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** ==================================================================
** Search for "@@" to find all configurable definitions.
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** ===================================================================
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*/
/*
@@ 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.
*/
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#if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
#define LUA_ANSI
#endif
#if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)
#define LUA_WIN /* enable goodies for regular Windows platforms */
#endif
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#if defined(LUA_WIN)
#define LUA_DL_DLL
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
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#endif
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#if defined(LUA_USE_LINUX)
#define LUA_USE_POSIX
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#define LUA_USE_DLOPEN /* needs an extra library: -ldl */
#define LUA_USE_READLINE /* needs some extra libraries */
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#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
#endif
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#if defined(LUA_USE_MACOSX)
#define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* does not need -ldl */
#define LUA_USE_READLINE /* needs an extra library: -lreadline */
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#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
#endif
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/*
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@@ LUA_USE_POSIX includes all functionality listed as X/Open System
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@* 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
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#define LUA_USE_GMTIME_R
#endif
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/*
@@ 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.
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** CHANGE them if your machine has a non-conventional directory
** hierarchy or if you want to install your libraries in
** non-conventional directories.
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*/
#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.
*/
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#define LUA_LDIR "!\\lua\\"
#define LUA_CDIR "!\\"
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#define LUA_PATH_DEFAULT \
LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" ".\\?.lua"
#define LUA_CPATH_DEFAULT \
LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"
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#else /* }{ */
#define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
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#define LUA_ROOT "/usr/local/"
#define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR
#define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR
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#define LUA_PATH_DEFAULT \
LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" "./?.lua"
#define LUA_CPATH_DEFAULT \
LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
#endif /* } */
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/*
@@ LUA_DIRSEP is the directory separator (for submodules).
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** 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_ENV is the name of the variable that holds the current
@@ environment, used to access global names.
** CHANGE it if you do not like this name.
*/
#define LUA_ENV "_ENV"
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/*
@@ LUA_API is a mark for all core API functions.
@@ LUALIB_API is a mark for all auxiliary library functions.
@@ LUAMOD_API is a mark for all standard library opening functions.
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** CHANGE them if you need to define those functions in some special way.
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** 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).
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*/
#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 /* }{ */
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#define LUA_API extern
#endif /* } */
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/* more often than not the libs go together with the core */
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#define LUALIB_API LUA_API
#define LUAMOD_API LUALIB_API
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/*
@@ LUAI_FUNC is a mark for all extern functions that are not to be
@* exported to outside modules.
@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
@* that are not to be exported to outside modules (LUAI_DDEF for
@* definitions and LUAI_DDEC for declarations).
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** 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. Not all elf targets support
** this attribute. Unfortunately, gcc does not offer a way to check
** whether the target offers that support, and those without support
** give a warning about it. To avoid these warnings, change to the
** default definition.
*/
#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
defined(__ELF__) /* { */
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#define LUAI_FUNC __attribute__((visibility("hidden"))) extern
#define LUAI_DDEC LUAI_FUNC
#define LUAI_DDEF /* empty */
#else /* }{ */
#define LUAI_FUNC extern
#define LUAI_DDEC extern
#define LUAI_DDEF /* empty */
#endif /* } */
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/*
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@@ LUA_QL describes how error messages quote program elements.
** CHANGE it if you want a different appearance.
*/
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#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.
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** CHANGE it if you want a different size.
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*/
#define LUA_IDSIZE 60
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/*
@@ luai_writestring/luai_writeline define how 'print' prints its results.
** They are only used in libraries and the stand-alone program. (The #if
** avoids including 'stdio.h' everywhere.)
*/
#if defined(LUA_LIB) || defined(lua_c)
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#include <stdio.h>
#define luai_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
#define luai_writeline() (luai_writestring("\n", 1), fflush(stdout))
#endif
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/*
@@ luai_writestringerror defines how to print error messages.
** (A format string with one argument is enough for Lua...)
*/
#define luai_writestringerror(s,p) \
(fprintf(stderr, (s), (p)), fflush(stderr))
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/*
@@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is,
** strings that are internalized. (Cannot be smaller than reserved words
** or tags for metamethods, as these strings must be internalized;
** #("function") = 8, #("__newindex") = 10.)
*/
#define LUAI_MAXSHORTLEN 40
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/*
** {==================================================================
** Compatibility with previous versions
** ===================================================================
*/
/*
@@ LUA_COMPAT_ALL controls all compatibility options.
** You can define it to get all options, or change specific options
** to fit your specific needs.
*/
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#if defined(LUA_COMPAT_ALL) /* { */
/*
@@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
** You can replace it with 'table.unpack'.
*/
#define LUA_COMPAT_UNPACK
/*
@@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
** You can replace it with 'package.searchers'.
*/
#define LUA_COMPAT_LOADERS
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/*
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@@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
** You can call your C function directly (with light C functions).
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*/
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#define lua_cpcall(L,f,u) \
(lua_pushcfunction(L, (f)), \
lua_pushlightuserdata(L,(u)), \
lua_pcall(L,1,0,0))
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/*
@@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
** You can rewrite 'log10(x)' as 'log(x, 10)'.
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*/
#define LUA_COMPAT_LOG10
/*
@@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
** library. You can rewrite 'loadstring(s)' as 'load(s)'.
*/
#define LUA_COMPAT_LOADSTRING
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/*
@@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
*/
#define LUA_COMPAT_MAXN
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/*
@@ The following macros supply trivial compatibility for some
** changes in the API. The macros themselves document how to
** change your code to avoid using them.
*/
#define lua_strlen(L,i) lua_rawlen(L, (i))
#define lua_objlen(L,i) lua_rawlen(L, (i))
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#define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ)
#define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT)
/*
@@ LUA_COMPAT_MODULE controls compatibility with previous
** module functions 'module' (Lua) and 'luaL_register' (C).
*/
#define LUA_COMPAT_MODULE
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#endif /* } */
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/* }================================================================== */
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/*
@@ LUAI_BITSINT defines the number of bits in an int.
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** CHANGE here if Lua cannot automatically detect the number of bits of
** your machine. Probably you do not need to change this.
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*/
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/* avoid overflows in comparison */
#if INT_MAX-20 < 32760 /* { */
#define LUAI_BITSINT 16
#elif INT_MAX > 2147483640L /* }{ */
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/* int has at least 32 bits */
#define LUAI_BITSINT 32
#else /* }{ */
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#error "you must define LUA_BITSINT with number of bits in an integer"
#endif /* } */
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/*
@@ LUA_INT32 is an signed integer with exactly 32 bits.
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@@ LUAI_UMEM is an unsigned integer big enough to count the total
@* memory used by Lua.
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@@ LUAI_MEM is a signed integer big enough to count the total memory
@* used by Lua.
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** CHANGE here if for some weird reason the default definitions are not
** good enough for your machine. Probably you do not need to change
** this.
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*/
#if LUAI_BITSINT >= 32 /* { */
#define LUA_INT32 int
#define LUAI_UMEM size_t
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#define LUAI_MEM ptrdiff_t
#else /* }{ */
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/* 16-bit ints */
#define LUA_INT32 long
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#define LUAI_UMEM unsigned long
#define LUAI_MEM long
#endif /* } */
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/*
@@ LUAI_MAXSTACK limits the size of the Lua stack.
** CHANGE it if you need a different limit. This limit is arbitrary;
** its only purpose is to stop Lua to consume unlimited stack
** space (and to reserve some numbers for pseudo-indices).
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*/
#if LUAI_BITSINT >= 32
#define LUAI_MAXSTACK 1000000
#else
#define LUAI_MAXSTACK 15000
#endif
/* reserve some space for error handling */
#define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000)
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/*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
** CHANGE it if it uses too much C-stack space.
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*/
#define LUAL_BUFFERSIZE BUFSIZ
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/*
** {==================================================================
** The following definitions set the numeric types for Lua.
** Lua should work fine with 32-bit or 64-bit integers mixed with
** 32-bit or 64-bit floats. The usual configurations are 64-bit
** integers and floats (the default) and 32-bit integers and floats.
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** ===================================================================
*/
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/*
@@ LUA_INT_INT/LUA_INT_LONG/LUA_INT_LONGLONG defines size for Lua integers;
@@ LUA_REAL_FLOAT/LUA_REAL_DOUBLE/LUA_REAL_LONGDOUBLE defines size for
@* Lua floats.
** Default is long long + double
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*/
#define LUA_INT_LONGLONG
#define LUA_REAL_DOUBLE
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/*
@@ LUA_NUMBER is the floating-point type used by Lua.
**
@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
@* over a floating number.
**
@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
@@ LUA_NUMBER_SCAN is the format for reading floats.
@@ LUA_NUMBER_FMT is the format for writing floats.
@@ lua_number2str converts a floats to a string.
**
@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
**
@@ lua_str2number converts a decimal numeric string to a number.
*/
#if defined(LUA_REAL_FLOAT) /* { single float */
#define LUA_NUMBER float
#define LUAI_UACNUMBER double
#define LUA_NUMBER_FRMLEN ""
#define LUA_NUMBER_SCAN "%f"
#define LUA_NUMBER_FMT "%.7g"
#define l_mathop(op) op##f
#define lua_str2number(s,p) strtof((s), (p))
#elif defined(LUA_REAL_LONGDOUBLE) /* }{ long double */
#define LUA_NUMBER long double
#define LUAI_UACNUMBER long double
#define LUA_NUMBER_FRMLEN "L"
#define LUA_NUMBER_SCAN "%Lf"
#define LUA_NUMBER_FMT "%.19Lg"
#define l_mathop(op) op##l
#define lua_str2number(s,p) strtold((s), (p))
#elif defined(LUA_REAL_DOUBLE) /* }{ double */
#define LUA_NUMBER double
#define LUAI_UACNUMBER double
#define LUA_NUMBER_FRMLEN ""
#define LUA_NUMBER_SCAN "%lf"
#define LUA_NUMBER_FMT "%.14g"
#define l_mathop(op) op
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#define lua_str2number(s,p) strtod((s), (p))
#else /* }{ */
#error "numeric real type not defined"
#endif /* } */
#if defined(LUA_ANSI)
/* C89 does not support 'opf' variants for math functions */
#undef l_mathop
#define l_mathop(op) (lua_Number)op
#endif
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#if defined(LUA_ANSI) || defined(_WIN32)
/* C89 and Windows do not support 'strtof'... */
#undef lua_str2number
#define lua_str2number(s,p) ((lua_Number)strtod((s), (p)))
#endif
#define l_floor(x) (l_mathop(floor)(x))
#define lua_number2str(s,n) sprintf((s), LUA_NUMBER_FMT, (n))
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/*
@@ The luai_num* macros define the primitive operations over numbers.
@* They should work for any size of floating numbers.
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*/
/* the following operations need the math library */
#if defined(lobject_c) || defined(lvm_c)
#include <math.h>
#define luai_nummod(L,a,b) ((a) - l_floor((a)/(b))*(b))
#define luai_numpow(L,a,b) (l_mathop(pow)(a,b))
#endif
/* these are quite standard operations */
#if defined(LUA_CORE)
#define luai_numadd(L,a,b) ((a)+(b))
#define luai_numsub(L,a,b) ((a)-(b))
#define luai_nummul(L,a,b) ((a)*(b))
#define luai_numdiv(L,a,b) ((a)/(b))
#define luai_numunm(L,a) (-(a))
#define luai_numeq(a,b) ((a)==(b))
#define luai_numlt(L,a,b) ((a)<(b))
#define luai_numle(L,a,b) ((a)<=(b))
#define luai_numisnan(L,a) (!luai_numeq((a), (a)))
#endif
/*
@@ LUA_INTEGER is the integer type used by Lua.
**
@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
**
@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
@@ LUA_INTEGER_SCAN is the format for reading integers.
@@ LUA_INTEGER_FMT is the format for writing integers.
@@ lua_integer2str converts an integer to a string.
*/
#if defined(LUA_INT_INT) /* { int */
#define LUA_INTEGER int
#define LUA_INTEGER_FRMLEN ""
#elif defined(LUA_INT_LONG) /* }{ long */
#define LUA_INTEGER long
#define LUA_INTEGER_FRMLEN "l"
#elif defined(LUA_INT_LONGLONG) /* }{ long long */
#if defined(_WIN32)
#define LUA_INTEGER __int64
#define LUA_INTEGER_FRMLEN "I64"
#else
#define LUA_INTEGER long long
#define LUA_INTEGER_FRMLEN "ll"
#endif
#else /* }{ */
#error "numeric integer type not defined"
#endif /* } */
#define LUA_INTEGER_SCAN "%" LUA_INTEGER_FRMLEN "d"
#define LUA_INTEGER_FMT "%" LUA_INTEGER_FRMLEN "d"
#define lua_integer2str(s,n) sprintf((s), LUA_INTEGER_FMT, (n))
#define LUA_UNSIGNED unsigned LUA_INTEGER
/* }================================================================== */
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/* =================================================================== */
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/*
** Local configuration. You can use this space to add your redefinitions
** without modifying the main part of the file.
*/
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#endif
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