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"order" and "concat" operations choose tag methods the same way that

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"arith" operations do (first the first parameter, etc).
This commit is contained in:
Roberto Ierusalimschy 1997-06-16 15:42:32 -03:00
parent c9a2dfeb2c
commit e4b69d6c9c
1 changed files with 14 additions and 32 deletions
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46
opcode.c
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@ -3,7 +3,7 @@
** TecCGraf - PUC-Rio
*/
char *rcs_opcode="$Id: opcode.c,v 4.8 1997/06/12 18:27:29 roberto Exp roberto $";
char *rcs_opcode="$Id: opcode.c,v 4.9 1997/06/16 16:50:22 roberto Exp roberto $";
#include <setjmp.h>
#include <stdio.h>
@ -466,9 +466,7 @@ void lua_travstack (int (*fn)(TObject *))
static void lua_message (char *s)
{
TObject *im = luaI_geterrorim();
if (ttype(im) == LUA_T_NIL)
fprintf(stderr, "lua: %s\n", s);
else {
if (ttype(im) != LUA_T_NIL) {
lua_pushstring(s);
callIM(im, 1, 0);
}
@ -1008,7 +1006,7 @@ void luaI_gcIM (TObject *o)
}
static void call_arith (IMS event)
static void call_binTM (IMS event, char *msg)
{
TObject *im = luaI_getimbyObj(top-2, event); /* try first operand */
if (ttype(im) == LUA_T_NIL) {
@ -1016,29 +1014,19 @@ static void call_arith (IMS event)
if (ttype(im) == LUA_T_NIL) {
im = luaI_getim(0, event); /* try a 'global' i.m. */
if (ttype(im) == LUA_T_NIL)
lua_error("unexpected type at arithmetic operation");
lua_error(msg);
}
}
lua_pushstring(luaI_eventname[event]);
callIM(im, 3, 1);
}
static void concim (TObject *o)
static void call_arith (IMS event)
{
TObject *im = luaI_getimbyObj(o, IM_CONCAT);
if (ttype(im) == LUA_T_NIL)
lua_error("unexpected type at conversion to string");
callIM(im, 2, 1);
call_binTM(event, "unexpected type at arithmetic operation");
}
static void ordim (TObject *o, IMS event)
{
TObject *im = luaI_getimbyObj(o, event);
if (ttype(im) == LUA_T_NIL)
lua_error("unexpected type at comparison");
lua_pushstring(luaI_eventname[event]);
callIM(im, 3, 1);
}
static void comparison (lua_Type ttype_less, lua_Type ttype_equal,
lua_Type ttype_great, IMS op)
@ -1048,16 +1036,12 @@ static void comparison (lua_Type ttype_less, lua_Type ttype_equal,
int result;
if (ttype(l) == LUA_T_NUMBER && ttype(r) == LUA_T_NUMBER)
result = (nvalue(l) < nvalue(r)) ? -1 : (nvalue(l) == nvalue(r)) ? 0 : 1;
else if (tostring(l)) {
ordim(l, op);
return;
}
else if (tostring(r)) {
ordim(r, op);
return;
}
else
else if (ttype(l) == LUA_T_STRING && ttype(r) == LUA_T_STRING)
result = strcmp(svalue(l), svalue(r));
else {
call_binTM(op, "unexpected type at comparison");
return;
}
top--;
nvalue(top-1) = 1;
ttype(top-1) = (result < 0) ? ttype_less :
@ -1372,10 +1356,8 @@ static StkId lua_execute (Byte *pc, StkId base)
case CONCOP: {
TObject *l = top-2;
TObject *r = top-1;
if (tostring(l)) /* first argument is not a string */
concim(l);
else if (tostring(r)) /* second argument is not a string */
concim(r);
if (tostring(l) || tostring(r))
call_binTM(IM_CONCAT, "unexpected type for concatenation");
else {
tsvalue(l) = lua_createstring(lua_strconc(svalue(l),svalue(r)));
--top;