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new macro LUA_MAXUNSIGNED + support for 'short' integers (for tests only)

This commit is contained in:
Roberto Ierusalimschy 2014-04-12 11:51:53 -03:00
parent ef789d4161
commit ab964ad7c6
1 changed files with 37 additions and 13 deletions
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50
luaconf.h
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@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.195 2014/04/09 17:05:11 roberto Exp roberto $
** $Id: luaconf.h,v 1.196 2014/04/11 19:53:45 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@ -536,9 +536,32 @@
@@ LUA_INTEGER_FMT is the format for writing integers.
@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
@@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED.
@@ lua_integer2str converts an integer to a string.
*/
/* The following definitions are good for most cases here */
#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_MAXUNSIGNED (~(LUA_UNSIGNED)0)
#define LUA_MAXINTEGER ((LUA_INTEGER)(LUA_MAXUNSIGNED >> 1))
#define LUA_MININTEGER ((LUA_INTEGER)~(LUA_MAXUNSIGNED >> 1))
#define LUAI_UACINT LUA_INTEGER
/*
** use LUAI_UACINT here to avoid problems with promotions (which can change
** an unsigned back to a signed type)
*/
#define LUA_UNSIGNED unsigned LUAI_UACINT
/* now the variable definitions */
#if defined(LUA_INT_INT) /* { int */
#define LUA_INTEGER int
@ -559,24 +582,25 @@
#define LUA_INTEGER_FRMLEN "ll"
#endif
#elif defined(LUA_INT_SHORT) /* }{ short int; for tests */
#define LUA_INTEGER short int
#define LUA_INTEGER_FRMLEN ""
#undef LUA_MAXUNSIGNED
#undef LUAI_UACINT
#undef LUA_INTEGER_SCAN
#define LUA_MAXUNSIGNED 0xffffu
#define LUAI_UACINT int
#define LUA_INTEGER_SCAN "%hd"
#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
#define LUA_MAXINTEGER ((LUA_INTEGER)(~(LUA_UNSIGNED)0 >> 1))
#define LUA_MININTEGER ((LUA_INTEGER)~(~(LUA_UNSIGNED)0 >> 1))
#define LUAI_UACINT LUA_INTEGER
/* }================================================================== */