/*
** returns the `main' position of an element in a table (that is, the index
** of its hash value)
**
** Floating point numbers with integer value give the hash position of the
** integer (so they use the same table position).
*/
static Node *mainposition (const Table *t, const TValue *key) {
switch (ttype(key)) {
#ifdef LUA_TINT
case LUA_TINT:
return hashint(t,ivalue(key));
#endif
case LUA_TNUMBER: {
#ifdef LUA_TINT
lua_Integer i;
if (tt_integer_valued(key,&i))
return hashint(t, i);
# ifdef LNUM_COMPLEX
/* Complex numbers are hashed by their scalar part. Pure imaginary values
* with scalar 0 or -0 should give same hash.
*/
if (nvalue_img_fast(key)!=0 && luai_numeq(nvalue_fast(key),0))
return gnode(t, 0); /* 0 and -0 to give same hash */
# endif
#else
if (luai_numeq(nvalue(key),0)) return gnode(t, 0); /* 0 and -0 to give same hash */
#endif
return hashnum(t,nvalue_fast(key));
}
case LUA_TSTRING:
return hashstr(t, rawtsvalue(key));
case LUA_TBOOLEAN:
return hashboolean(t, bvalue(key));
case LUA_TLIGHTUSERDATA:
return hashpointer(t, pvalue(key));
default:
return hashpointer(t, gcvalue(key));
}
}
/* 's' is expected to be LUAI_MAXNUMBER2STR long (enough for any number)
*/
void luaO_num2buf( char *s, const TValue *o )
{
lua_Number n;
lua_assert( ttisnumber(o) );
/* Reason to handle integers differently is not only speed, but accuracy as
* well. We want to make any integer tostring() without roundings, at all.
*/
#ifdef LUA_TINT
if (ttisint(o)) {
lua_integer2str( s, ivalue(o) );
return;
}
#endif
n= nvalue_fast(o);
lua_real2str(s, n);
#ifdef LNUM_COMPLEX
lua_Number n2= nvalue_img_fast(o);
if (n2!=0) { /* Postfix with +-Ni */
int re0= (n == 0);
char *s2= re0 ? s : strchr(s,'\0');
if ((!re0) && (n2>0)) *s2++= '+';
lua_real2str( s2, n2 );
strcat(s2,"i");
}
#endif
}
static void PrintConstant(const Proto* f, int i)
{
const TValue* o=&f->k[i];
switch (ttype(o))
{
case LUA_TNIL:
printf("nil");
break;
case LUA_TBOOLEAN:
printf(bvalue(o) ? "true" : "false");
break;
case LUA_TINT:
printf(LUA_INTEGER_FMT,ivalue(o));
break;
case LUA_TNUMBER:
#ifdef LNUM_COMPLEX
// TBD: Do we get complex values here?
{ lua_Number b= nvalue_img_fast(o);
printf( LUA_NUMBER_FMT "%s" LUA_NUMBER_FMT "i", nvalue_fast(o), b>=0 ? "+":"", b ); }
#endif
printf(LUA_NUMBER_FMT,nvalue_fast(o));
break;
case LUA_TSTRING:
PrintString(rawtsvalue(o));
break;
default: /* cannot happen */
printf("? type=%d",ttype(o));
break;
}
}
int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
int res;
int tl= ttype(l);
if (tl == ttype(r)) {
switch(tl) {
#ifdef LUA_TINT
case LUA_TINT:
return ivalue(l) < ivalue(r);
#endif
case LUA_TNUMBER:
#ifdef LNUM_COMPLEX
if ( (nvalue_img_fast(l)!=0) || (nvalue_img_fast(r)!=0) )
error_complex( L, l, r );
#endif
return luai_numlt(nvalue_fast(l), nvalue_fast(r));
case LUA_TSTRING:
return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
}
if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
return res;
/* fall through to 'luaG_ordererror()' */
}
#ifdef LUA_TINT
else if (ttype_ext(l) == ttype_ext(r)) {
lua_Integer tmp;
/* Avoid accuracy losing casts: if 'r' is integer by value, do comparisons
* in integer realm. Only otherwise cast 'l' to FP (which might change its
* value).
*/
# ifdef LNUM_COMPLEX
if ( (nvalue_img(l)!=0) || (nvalue_img(r)!=0) )
error_complex( L, l, r );
# endif
if (tl==LUA_TINT) { /* l:int, r:num */
return tt_integer_valued(r,&tmp) ? (ivalue(l) < tmp)
: luai_numlt( cast_num(ivalue(l)), nvalue_fast(r) );
} else { /* l:num, r:int */
return tt_integer_valued(l,&tmp) ? (tmp < ivalue(r))
: luai_numlt( nvalue_fast(l), cast_num(ivalue(r)) );
}
}
#endif
return luaG_ordererror(L, l, r);
}
static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
int res;
int tl= ttype(l);
if (tl == ttype(r)) {
switch(tl) {
#ifdef LUA_TINT
case LUA_TINT:
return ivalue(l) <= ivalue(r);
#endif
case LUA_TNUMBER:
#ifdef LNUM_COMPLEX
if ( (nvalue_img_fast(l)!=0) || (nvalue_img_fast(r)!=0) )
error_complex( L, l, r );
#endif
return luai_numle(nvalue_fast(l), nvalue_fast(r));
case LUA_TSTRING:
return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
}
if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */
return res;
else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */
return !res;
/* fall through to 'luaG_ordererror()' */
}
#ifdef LUA_TINT
else if (ttype_ext(l) == ttype_ext(r)) {
lua_Integer tmp;
# ifdef LNUM_COMPLEX
if ( (nvalue_img(l)!=0) || (nvalue_img(r)!=0) )
error_complex( L, l, r );
# endif
if (tl==LUA_TINT) { /* l:int, r:num */
return tt_integer_valued(r,&tmp) ? (ivalue(l) <= tmp)
: luai_numle( cast_num(ivalue(l)), nvalue_fast(r) );
} else { /* l:num, r:int */
return tt_integer_valued(l,&tmp) ? (tmp <= ivalue(r))
: luai_numle( nvalue_fast(l), cast_num(ivalue(r)) );
}
}
#endif
return luaG_ordererror(L, l, r);
}
/*
* If a LUA_TNUMBER has integer value, give it.
*/
int /*bool*/ tt_integer_valued( const TValue *o, lua_Integer *ref ) {
lua_Number d;
lua_Integer i;
lua_assert( ttype(o)==LUA_TNUMBER );
lua_assert( ref );
#ifdef LNUM_COMPLEX
if (nvalue_img_fast(o)!=0) return 0;
#endif
d= nvalue_fast(o);
lua_number2integer(i, d);
if (cast_num(i) == d) {
*ref= i; return 1;
}
return 0;
}
