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macro 'LUA_C89_NUMBERS' makes a little easier to use C89 numerical types

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This commit is contained in:
Roberto Ierusalimschy 2014-12-10 09:56:55 -02:00
parent 5c519a69d3
commit bd8ce7e331
1 changed files with 25 additions and 37 deletions
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62
luaconf.h
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@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.229 2014/11/21 12:15:00 roberto Exp roberto $
** $Id: luaconf.h,v 1.230 2014/11/25 18:21:57 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@ -72,6 +72,16 @@
#endif
/*
@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
** C89 ('long' and 'double'); Windows has '__int64', so it does not need
** to use this case.
*/
#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
#define LUA_C89_NUMBERS
#endif
/*
@@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'.
@ -90,17 +100,16 @@
** Lua integers.
@@ LUA_REAL_FLOAT / LUA_REAL_DOUBLE / LUA_REAL_LONGDOUBLE defines
** the type for Lua floats.
** Lua should work fine with any mix of these options (if supported by
** your C compiler). The usual configurations are 64-bit integers and
** 'double' (the default) and 32-bit integers and 'float' (Small Lua,
** for restricted platforms). C compilers not compliant with C99 may
** not have support for 'long long', so the default in that case is
** 'long'/'double'.
** Lua should work fine with any mix of these options (if supported
** by your C compiler). The usual configurations are 64-bit integers
** and 'double' (the default), 32-bit integers and 'float' (Small Lua,
** for restricted platforms), and 'long'/'double' (for C compilers not
** compliant with C99, which may not have support for 'long long').
*/
#if defined(LUA_32BITS) /* { */
#if defined(LUA_32BITS) /* { */
/*
** Small Lua
** Small Lua (32-bit integers and 'float')
*/
#if LUAI_BITSINT >= 32 /* use 'int' if big enough */
#define LUA_INT_INT
@ -109,15 +118,14 @@
#endif
#define LUA_REAL_FLOAT
#elif defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS) /* }{ */
#elif defined(LUA_C89_NUMBERS) /* }{ */
/*
** use largest types available for C89 ('long' and 'double');
** Windows has '__int64', so does not need to use this case
** largest types available for C89 ('long' and 'double')
*/
#define LUA_INT_LONG
#define LUA_REAL_DOUBLE
#else /* }{ */
#else /* }{ */
/*
** default configuration for 64-bit Lua ('long long' and 'double');
** Windows will use '__int64'
@ -557,7 +565,7 @@
#elif defined(LUA_INT_LONGLONG) /* }{ long long */
#if defined(LUA_USE_WINDOWS)
#if defined(LUA_USE_WINDOWS) /* { */
#define LUA_INTEGER __int64
#define LUA_INTEGER_FRMLEN "I64"
@ -565,11 +573,11 @@
#define LUA_MAXINTEGER _I64_MAX
#define LUA_MININTEGER _I64_MIN
#else
#else /* }{ */
#if !defined(LLONG_MAX)
#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
or '-DLUA_USE_C89' (see file 'luaconf.h' for details)"
or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
#endif
#define LUA_INTEGER long long
@ -578,27 +586,7 @@
#define LUA_MAXINTEGER LLONG_MAX
#define LUA_MININTEGER LLONG_MIN
#endif
#elif defined(LUA_INT_SHORT) /* }{ short int */
/*
** this option is for internal tests only; it is not particularly useful
** and it does not pass the test suit.
*/
#define LUA_INTEGER short int
#define LUA_INTEGER_FRMLEN ""
#define LUA_MAXINTEGER SHRT_MAX
#define LUA_MININTEGER SHRT_MIN
#undef LUAI_UACINT
#define LUAI_UACINT int
#undef LUAI_BITSINT
#define LUAI_BITSINT 16
#define l_castS2U(x) ((LUA_UNSIGNED)(unsigned short)(x))
#endif /* } */
#else /* }{ */