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Using an enumeration for float->integer coercion modes

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This commit is contained in:
Roberto Ierusalimschy
2019-12-05 14:14:29 -03:00
parent 2d92102dee
commit d30569c064
4 changed files with 30 additions and 22 deletions
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19
lvm.h
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@@ -33,10 +33,20 @@
** integral values)
*/
#if !defined(LUA_FLOORN2I)
#define LUA_FLOORN2I 0
#define LUA_FLOORN2I F2Ieq
#endif
/*
** Rounding modes for float->integer coercion
*/
typedef enum {
F2Ieq, /* no rounding; accepts only integral values */
F2Ifloor, /* takes the floor of the number */
F2Iceil, /* takes the ceil of the number */
} F2Imod;
/* convert an object to a float (including string coercion) */
#define tonumber(o,n) \
(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
@@ -104,9 +114,10 @@ LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p, int mode);
LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, int mode);
LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
F2Imod mode);
LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
StkId val, const TValue *slot);
LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,