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exports luaV_arith to be used by lua_arith + uses 'luaO_arith' to 

perform basic arith. operations
This commit is contained in:
Roberto Ierusalimschy 2009-06-17 14:50:09 -03:00
parent 96fa34ec32
commit 2bdd194f43
1 changed files with 7 additions and 16 deletions
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23
lvm.c
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@ -1,5 +1,5 @@
/*
** $Id: lvm.c,v 2.91 2009/06/10 16:57:53 roberto Exp roberto $
** $Id: lvm.c,v 2.92 2009/06/17 16:17:14 roberto Exp roberto $
** Lua virtual machine
** See Copyright Notice in lua.h
*/
@ -329,23 +329,14 @@ static void objlen (lua_State *L, StkId ra, const TValue *rb) {
}
static void Arith (lua_State *L, StkId ra, const TValue *rb,
const TValue *rc, TMS op) {
void luaV_arith (lua_State *L, StkId ra, const TValue *rb,
const TValue *rc, TMS op) {
TValue tempb, tempc;
const TValue *b, *c;
if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
(c = luaV_tonumber(rc, &tempc)) != NULL) {
lua_Number nb = nvalue(b), nc = nvalue(c);
switch (op) {
case TM_ADD: setnvalue(ra, luai_numadd(L, nb, nc)); break;
case TM_SUB: setnvalue(ra, luai_numsub(L, nb, nc)); break;
case TM_MUL: setnvalue(ra, luai_nummul(L, nb, nc)); break;
case TM_DIV: setnvalue(ra, luai_numdiv(L, nb, nc)); break;
case TM_MOD: setnvalue(ra, luai_nummod(L, nb, nc)); break;
case TM_POW: setnvalue(ra, luai_numpow(L, nb, nc)); break;
case TM_UNM: setnvalue(ra, luai_numunm(L, nb)); break;
default: lua_assert(0); break;
}
lua_Number res = luaO_arith(op - TM_ADD + LUA_OPADD, nvalue(b), nvalue(c));
setnvalue(ra, res);
}
else if (!call_binTM(L, rb, rc, ra, op))
luaG_aritherror(L, rb, rc);
@ -440,7 +431,7 @@ void luaV_finishOp (lua_State *L) {
setnvalue(ra, op(L, nb, nc)); \
} \
else \
Protect(Arith(L, ra, rb, rc, tm)); \
Protect(luaV_arith(L, ra, rb, rc, tm)); \
}
@ -570,7 +561,7 @@ void luaV_execute (lua_State *L) {
setnvalue(ra, luai_numunm(L, nb));
}
else {
Protect(Arith(L, ra, rb, rb, TM_UNM));
Protect(luaV_arith(L, ra, rb, rb, TM_UNM));
}
continue;
}