source: bootcd/isolinux/syslinux-6.03/com32/lua/src/luaconf.h

/*
** $Id: luaconf.h,v 1.176.1.1 2013/04/12 18:48:47 roberto Exp $
** 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(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

#if defined(LUA_WIN)
#define LUA_DL_DLL
#define LUA_USE_AFORMAT         /* assume 'printf' handles 'aA' specifiers */
#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 */
#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

#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 */
#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



/*
@@ LUA_USE_POSIX includes all functionality 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
#define LUA_USE_GMTIME_R
#endif



/*
@@ 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_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"

#elif defined(SYSLINUX)
/* Extensions for converting the Syslinux path into package load paths */
#define LUA_PATH_DEFAULT  ".lua"
#define LUA_CPATH_DEFAULT ".c32"
#else                   /* }{ */

#define LUA_VDIR        LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
#define LUA_ROOT        "/usr/local/"
#define LUA_LDIR        LUA_ROOT "share/lua/" LUA_VDIR
#define LUA_CDIR        LUA_ROOT "lib/lua/" LUA_VDIR
#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                  /* } */


/*
@@ 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_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"


/*
@@ 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.
** 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
#define LUAMOD_API      LUALIB_API


/*
@@ 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).
** 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__)            /* { */
#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                          /* } */



/*
@@ 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


/*
@@ 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)
#include <stdio.h>
#define luai_writestring(s,l)   fwrite((s), sizeof(char), (l), stdout)
#define luai_writeline()        (luai_writestring("\n", 1), fflush(stdout))
#endif

/*
@@ 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))


/*
@@ 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



/*
** {==================================================================
** 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.
*/
#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

/*
@@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
** You can call your C function directly (with light C functions).
*/
#define lua_cpcall(L,f,u)  \
        (lua_pushcfunction(L, (f)), \
         lua_pushlightuserdata(L,(u)), \
         lua_pcall(L,1,0,0))


/*
@@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
** You can rewrite 'log10(x)' as 'log(x, 10)'.
*/
#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

/*
@@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
*/
#define LUA_COMPAT_MAXN

/*
@@ 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))

#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

#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                          /* } */


/*
@@ LUA_INT32 is an signed integer with exactly 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. Probably you do not need to change
** this.
*/
#if LUAI_BITSINT >= 32          /* { */
#define LUA_INT32       int
#define LUAI_UMEM       size_t
#define LUAI_MEM        ptrdiff_t
#else                           /* }{ */
/* 16-bit ints */
#define LUA_INT32       long
#define LUAI_UMEM       unsigned long
#define LUAI_MEM        long
#endif                          /* } */


/*
@@ 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).
*/
#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)




/*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
** CHANGE it if it uses too much C-stack space.
*/
#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_INTEGRAL to produce a system that uses no
   floating point operations by changing the type of Lua numbers from
   double to long.  It implements division and modulus so that 

   x == (x / y) * y + x % y.  
   
   The exponentiation function returns zero for negative exponents.
   Defining LUA_NUMBER_INTEGRAL also removes the difftime function,
   and the math module should not be used.  The string.format function
   no longer handles the floating point directives %e, %E, %f, %g, and
   %G. */

#define LUA_NUMBER_INTEGRAL
#ifdef LUA_NUMBER_INTEGRAL
#define LUA_NUMBER      long
#else
#define LUA_NUMBER_DOUBLE
#define LUA_NUMBER      double
#endif

/*
@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
@* over a number.
*/
#define LUAI_UACNUMBER  LUA_NUMBER


/*
@@ 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.
*/
#ifdef LUA_NUMBER_INTEGRAL
#define LUA_NUMBER_SCAN         "%ld"
#define LUA_NUMBER_FMT          "%ld"
#else
#define LUA_NUMBER_SCAN         "%lf"
#define LUA_NUMBER_FMT          "%.14g"
#endif
#define lua_number2str(s,n)     sprintf((s), LUA_NUMBER_FMT, (n))
#define LUAI_MAXNUMBER2STR      32 /* 16 digits, sign, point, and \0 */


/*
@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
*/
#define l_mathop(x)             (x)


/*
@@ lua_str2number converts a decimal numeric string to a number.
@@ lua_strx2number converts an hexadecimal numeric string to a number.
** In C99, 'strtod' does both conversions. C89, however, has no function
** to convert floating hexadecimal strings to numbers. For these
** systems, you can leave 'lua_strx2number' undefined and Lua will
** provide its own implementation.
*/
#ifdef LUA_NUMBER_INTEGRAL
#define lua_str2number(s,p)     strtol((s), (p), 10)
#else
#define lua_str2number(s,p)     strtod((s), (p))
#endif

#ifdef SYSLINUX
#define lua_strx2number(s,p)    strtol((s), (p), 16)
#endif


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

#ifndef LUA_NUMBER_INTEGRAL
/* 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_mathop(floor)((a)/(b))*(b))
#define luai_numpow(L,a,b)      (l_mathop(pow)(a,b))
#endif
#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))
#ifdef LUA_NUMBER_INTEGRAL
#define luai_numdiv(L,a,b)              \
  (-1/2?                                \
   (a)/(b):                             \
   (((a)<0)==((b)<0)||(a)%(b)==0?       \
    (a)/(b):                            \
    (a)/(b)-1))
#define luai_nummod(L,a,b)              \
  (-1/2?                                \
   (a)%(b):                             \
   (((a)<0)==((b)<0)||(a)%(b)==0?       \
    (a)%(b):                            \
    (a)%(b)+(b)))
#define luai_lnumdiv(L,a,b)             \
  ((b)==0?                              \
   (luaG_runerror(L,"divide by zero"),0): \
   luai_numdiv(a,b))
#define luai_lnummod(L,a,b)             \
  ((b)==0?                              \
   (luaG_runerror(L,"modulo by zero"),0): \
   luai_nummod(a,b))
LUA_NUMBER luai_ipow(void *L, LUA_NUMBER, LUA_NUMBER);
#define luai_numpow(L,a,b)      (luai_ipow(L,a,b))
#else
#define luai_numdiv(L,a,b)      ((a)/(b))
#endif
#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 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     long
/* Changed to long for use with integral Lua numbers. */

/*
@@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
** It must have at least 32 bits.
*/
#define LUA_UNSIGNED    unsigned LUA_INT32



/*
** Some tricks with doubles
*/

#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI)    /* { */
/*
** The next definitions activate some tricks to speed up the
** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
**
@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
** DirectX idiosyncrasy.
**
@@ LUA_IEEE754TRICK uses a trick that should work on any machine
** using IEEE754 with a 32-bit integer type.
**
@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
** defined when LUA_INTEGER is a 32-bit integer.
**
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
** (0 for little endian, 1 for big endian); if not defined, Lua will
** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
**
@@ LUA_NANTRICK controls the use of a trick to pack all types into
** a single double value, using NaN values to represent non-number
** values. The trick only works on 32-bit machines (ints and pointers
** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
** with conventional endianess (12345678 or 87654321), in CPUs that do
** not produce signaling NaN values (all NaNs are quiet).
*/

/* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86)   /* { */

#define LUA_MSASMTRICK
#define LUA_IEEEENDIAN          0
#define LUA_NANTRICK


/* pentium 32 bits? */
#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN          0
#define LUA_NANTRICK

/* pentium 64 bits? */
#elif defined(__x86_64)                                         /* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN          0

#elif defined(__POWERPC__) || defined(__ppc__)                  /* }{ */

#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN          1

#else                                                           /* }{ */

/* assume IEEE754 and a 32-bit integer type */
#define LUA_IEEE754TRICK

#endif                                                          /* } */

#endif                                                  /* } */

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




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

/*
** Local configuration. You can use this space to add your redefinitions
** without modifying the main part of the file.
*/



#endif