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more "religious" definition for 'lua_numtointeger'

This commit is contained in:
Roberto Ierusalimschy 2014-05-27 10:59:03 -03:00
parent 456806f25c
commit 84db17b6fc
1 changed files with 7 additions and 9 deletions
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16
luaconf.h
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@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.203 2014/05/21 15:24:21 roberto Exp roberto $
** $Id: luaconf.h,v 1.204 2014/05/26 17:10:22 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@ -508,19 +508,17 @@
/*
@@ lua_numtointeger converts a float number to an integer, or
** return 0 if float is not within the range of a lua_Integer.
** (The comparisons are tricky because of rounding, which can or
** not occur depending on the relative sizes of floats and integers.
** (The comparisons are tricky because of rounding.
** The tests here assume a two-complement representation, where
** MININTEGER always has an exact representation as a float,
** while if LUA_MAXINTEGER has an exact representation, so does
** (LUA_MAXINTEGER + 1); otherwise, LUA_MAXINTEGER is equal to
** (LUA_MAXINTEGER + 1) when converted to a float.)
** while LUA_MAXINTEGER may not have one, and therefore its
** conversion to float may have an ill-defined value.)
** This macro should be used only when 'n' has an integral value.
*/
#define lua_numtointeger(n,p) \
(((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
(n) < (LUA_NUMBER)(LUA_MAXINTEGER) + 1) && \
(*p = (LUA_INTEGER)(n), 1))
((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
(n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
(*p = (LUA_INTEGER)(n), 1))
/*