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- Subject: LUA_NUMBER as unsigned long long
- From: Grizzly Bear <6grizzlybear@...>
- Date: Sat, 12 Jan 2013 19:56:05 -0800
Hi,
To be able to print(a-64-bit-integer), I made the following changes to
lua_conf.h. Simple tests, e.g.,
> a = 2305843009213693955
> print(a)
2305843009213693955
> print(string.format("%x", 2305843009213693955))
2000000000000003
seem to work. My platform is 64-bit MIPS and I don't need floating point. I'm
looking for some suggestions, e.g., on where things might go wrong with these
changes.
Thanks.
Wei
1. LUA_NUMBER
#if 0 /* wshi */
#define LUA_NUMBER double
#else
#define LUA_NUMBER unsigned long long
#endif
2. LUAI_UACNUMBER
#if 0 /* wshi */
#define LUAI_UACNUMBER double
#else
#define LUAI_UACNUMBER unsigned long long
#endif
3. LUA_NUMBERSCAN and LUA_NUMBER_FMT
#if 0 /* wshi */
#define LUA_NUMBER_SCAN "%lf"
#define LUA_NUMBER_FMT "%.14g"
#else
#define LUA_NUMBER_SCAN "%llu"
#define LUA_NUMBER_FMT "%llu"
#endif
4. LUA_USELONGLONG
#define LUA_USELONGLONG /* wshi */
#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
5. lua_str2number
#if 0 /* wshi */
#define lua_str2number(s,p) strtod((s), (p))
#else
#define lua_str2number(s,p) strtoll((s), (p), 10)
#endif
