mirror of https://github.com/lua/lua
i.m. "arith" and "order" splited for different operations
This commit is contained in:
Roberto Ierusalimschy
parent
88d7ffb0d0
commit
5d60470508
167
fallback.c
167
fallback.c
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@ -3,7 +3,7 @@
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** TecCGraf - PUC-Rio
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*/
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char *rcs_fallback="$Id: fallback.c,v 1.28 1997/03/19 19:41:10 roberto Exp roberto $";
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char *rcs_fallback="$Id: fallback.c,v 1.29 1997/03/19 21:12:34 roberto Exp roberto $";
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#include <stdio.h>
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#include <string.h>
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@ -18,6 +18,19 @@ char *rcs_fallback="$Id: fallback.c,v 1.28 1997/03/19 19:41:10 roberto Exp rober
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#include "hash.h"
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static char *typenames[] = { /* ORDER LUA_T */
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"userdata", "line", "cmark", "mark", "function",
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"function", "table", "string", "number", "nil",
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NULL
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};
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void luaI_type (void)
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{
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lua_Object o = lua_getparam(1);
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lua_pushstring(typenames[-ttype(luaI_Address(o))]);
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lua_pushnumber(lua_tag(o));
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}
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/* -------------------------------------------
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@ -94,27 +107,19 @@ void luaI_invalidaterefs (void)
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* Internal Methods
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*/
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char *eventname[] = {
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"gettable", /* IM_GETTABLE */
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"arith", /* IM_ARITH */
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"order", /* IM_ORDER */
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"concat", /* IM_CONCAT */
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"settable", /* IM_SETTABLE */
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"gc", /* IM_GC */
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"function", /* IM_FUNCTION */
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"index", /* IM_INDEX */
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char *luaI_eventname[] = { /* ORDER IM */
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"gettable", "settable", "index", "add", "sub", "mul", "div",
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"pow", "unm", "lt", "le", "gt", "ge", "concat", "gc", "function",
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NULL
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};
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char *geventname[] = {
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"error", /* GIM_ERROR */
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"getglobal", /* GIM_GETGLOBAL */
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"setglobal", /* GIM_SETGLOBAL */
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static char *geventname[] = { /* ORDER GIM */
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"error", "getglobal", "setglobal",
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NULL
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};
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static int luaI_findevent (char *name, char *list[])
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static int findstring (char *name, char *list[])
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{
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int i;
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for (i=0; list[i]; i++)
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@ -126,7 +131,7 @@ static int luaI_findevent (char *name, char *list[])
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static int luaI_checkevent (char *name, char *list[])
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{
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int e = luaI_findevent(name, list);
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int e = findstring(name, list);
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if (e < 0)
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lua_error("invalid event name");
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return e;
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@ -141,38 +146,25 @@ static struct IM {
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static int IMtable_size = 0;
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static int last_tag = LUA_T_NIL;
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static struct {
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lua_Type t;
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int event;
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} exceptions[] = { /* list of events that cannot be modified */
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{LUA_T_NUMBER, IM_ARITH},
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{LUA_T_NUMBER, IM_ORDER},
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{LUA_T_NUMBER, IM_GC},
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{LUA_T_STRING, IM_ARITH},
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{LUA_T_STRING, IM_ORDER},
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{LUA_T_STRING, IM_CONCAT},
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{LUA_T_STRING, IM_GC},
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{LUA_T_ARRAY, IM_GETTABLE},
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{LUA_T_ARRAY, IM_SETTABLE},
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{LUA_T_FUNCTION, IM_FUNCTION},
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{LUA_T_FUNCTION, IM_GC},
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{LUA_T_CFUNCTION, IM_FUNCTION},
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{LUA_T_CFUNCTION, IM_GC},
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{LUA_T_NIL, 0} /* flag end of list */
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static char validevents[NUM_TYPES][IM_N] = { /* ORDER LUA_T, ORDER IM */
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{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, /* LUA_T_USERDATA */
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* LUA_T_LINE */
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* LUA_T_CMARK */
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, /* LUA_T_MARK */
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{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0}, /* LUA_T_CFUNCTION */
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{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0}, /* LUA_T_FUNCTION */
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{0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, /* LUA_T_ARRAY */
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{1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, /* LUA_T_STRING */
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{1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1}, /* LUA_T_NUMBER */
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0} /* LUA_T_NIL */
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};
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static int validevent (int t, int event)
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static int validevent (lua_Type t, int e)
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{
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int i;
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if (t == LUA_T_NIL) /* cannot modify any event for nil */
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return 0;
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for (i=0; exceptions[i].t != LUA_T_NIL; i++)
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if (exceptions[i].t == t && exceptions[i].event == event)
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return 0;
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return 1;
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return (t < LUA_T_NIL) ? 1 : validevents[-t][e];
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}
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static void init_entry (int tag)
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{
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int i;
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@ -193,14 +185,14 @@ void luaI_initfallbacks (void)
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int lua_newtag (char *t)
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{
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int tp;
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--last_tag;
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if ((-last_tag) >= IMtable_size)
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IMtable_size = growvector(&luaI_IMtable, IMtable_size,
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struct IM, memEM, MAX_INT);
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if (strcmp(t, "table") == 0)
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luaI_IMtable[-last_tag].tp = LUA_T_ARRAY;
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else if (strcmp(t, "userdata") == 0)
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luaI_IMtable[-last_tag].tp = LUA_T_USERDATA;
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tp = -findstring(t, typenames);
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if (tp == LUA_T_ARRAY || tp == LUA_T_USERDATA)
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luaI_IMtable[-last_tag].tp = tp;
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else
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lua_error("invalid type for new tag");
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init_entry(last_tag);
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@ -246,14 +238,14 @@ int luaI_tag (Object *o)
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else return t;
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}
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Object *luaI_getim (int tag, int event)
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Object *luaI_getim (int tag, IMS event)
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{
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if (tag > LUA_T_USERDATA)
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tag = LUA_T_USERDATA; /* default for non-registered tags */
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return &luaI_IMtable[-tag].int_method[event];
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}
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Object *luaI_getimbyObj (Object *o, int event)
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Object *luaI_getimbyObj (Object *o, IMS event)
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{
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return luaI_getim(luaI_tag(o), event);
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}
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@ -261,13 +253,13 @@ Object *luaI_getimbyObj (Object *o, int event)
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void luaI_setintmethod (void)
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{
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int t = (int)luaL_check_number(1, "setintmethod");
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int e = luaI_checkevent(luaL_check_string(2, "setintmethod"), eventname);
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int e = luaI_checkevent(luaL_check_string(2, "setintmethod"), luaI_eventname);
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lua_Object func = lua_getparam(3);
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checktag(t);
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if (!validevent(t, e))
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lua_error("cannot change this internal method");
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luaL_arg_check(lua_isnil(func) || lua_isfunction(func), "setintmethod",
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3, "function expected");
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checktag(t);
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luaI_pushobject(&luaI_IMtable[-t].int_method[e]);
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luaI_IMtable[-t].int_method[e] = *luaI_Address(func);
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}
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@ -276,7 +268,7 @@ static Object gmethod[GIM_N] = {
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{LUA_T_NIL, {NULL}}, {LUA_T_NIL, {NULL}}, {LUA_T_NIL, {NULL}}
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};
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Object *luaI_getgim (int event)
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Object *luaI_getgim (IMGS event)
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{
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return &gmethod[event];
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}
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@ -326,47 +318,54 @@ static void typeFB (void)
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}
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static void fillvalids (IMS e, Object *func)
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{
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int t;
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for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++)
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if (validevent(t, e))
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luaI_IMtable[-t].int_method[e] = *func;
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}
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void luaI_setfallback (void)
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{
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int e;
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Object oldfunc;
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lua_CFunction replace;
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char *name = luaL_check_string(1, "setfallback");
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lua_Object func = lua_getparam(2);
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luaL_arg_check(lua_isfunction(func), "setfallback", 2, "function expected");
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e = luaI_findevent(name, geventname);
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e = findstring(name, geventname);
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if (e >= 0) { /* global event */
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switch (e) {
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case GIM_ERROR:
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gmethod[e] = *luaI_Address(func);
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lua_pushcfunction(errorFB);
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break;
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case GIM_GETGLOBAL: /* goes through */
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case GIM_SETGLOBAL:
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gmethod[e] = *luaI_Address(func);
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lua_pushcfunction(nilFB);
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break;
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default: lua_error("internal error");
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}
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oldfunc = gmethod[e];
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gmethod[e] = *luaI_Address(func);
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replace = (e == GIM_ERROR) ? errorFB : nilFB;
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}
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else { /* tagged name? */
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int t;
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Object oldfunc;
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e = luaI_checkevent(name, eventname);
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else if ((e = findstring(name, luaI_eventname)) >= 0) {
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oldfunc = luaI_IMtable[LUA_T_USERDATA].int_method[e];
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for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++)
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if (validevent(t, e))
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luaI_IMtable[-t].int_method[e] = *luaI_Address(func);
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if (oldfunc.ttype != LUA_T_NIL)
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luaI_pushobject(&oldfunc);
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else {
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switch (e) {
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case IM_GC: case IM_INDEX:
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lua_pushcfunction(nilFB);
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break;
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default:
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lua_pushcfunction(typeFB);
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break;
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}
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}
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fillvalids(e, luaI_Address(func));
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replace = (e == IM_GC || e == IM_INDEX) ? nilFB : typeFB;
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}
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else if (strcmp(name, "arith") == 0) { /* old arith fallback */
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int i;
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oldfunc = luaI_IMtable[LUA_T_USERDATA].int_method[IM_ADD];
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for (i=IM_ADD; i<=IM_UNM; i++) /* ORDER IM */
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fillvalids(i, luaI_Address(func));
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replace = typeFB;
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}
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else if (strcmp(name, "order") == 0) { /* old order fallback */
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int i;
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oldfunc = luaI_IMtable[LUA_T_USERDATA].int_method[IM_LT];
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for (i=IM_LT; i<=IM_GE; i++) /* ORDER IM */
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fillvalids(i, luaI_Address(func));
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replace = typeFB;
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}
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else {
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lua_error("invalid fallback name");
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replace = NULL; /* to avoid warnings */
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}
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if (oldfunc.ttype != LUA_T_NIL)
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luaI_pushobject(&oldfunc);
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else
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lua_pushcfunction(replace);
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}
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58
fallback.h
58
fallback.h
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@ -1,5 +1,5 @@
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/*
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** $Id: fallback.h,v 1.14 1997/02/26 17:38:41 roberto Unstable roberto $
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** $Id: fallback.h,v 1.15 1997/03/19 19:41:10 roberto Exp roberto $
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*/
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#ifndef fallback_h
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@ -8,19 +8,44 @@
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#include "lua.h"
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#include "opcode.h"
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#define IM_GETTABLE 0
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#define IM_ARITH 1
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#define IM_ORDER 2
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#define IM_CONCAT 3
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#define IM_SETTABLE 4
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#define IM_GC 5
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#define IM_FUNCTION 6
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#define IM_INDEX 7
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#define IM_N 8
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/*
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* WARNING: if you change the order of this enumeration,
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* grep "ORDER IM"
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*/
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typedef enum {
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IM_GETTABLE = 0,
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IM_SETTABLE,
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IM_INDEX,
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IM_ADD,
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IM_SUB,
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IM_MUL,
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IM_DIV,
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IM_POW,
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IM_UNM,
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IM_LT,
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IM_LE,
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IM_GT,
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IM_GE,
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IM_CONCAT,
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IM_GC,
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IM_FUNCTION
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} IMS;
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#define IM_N 16
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extern char *luaI_eventname[];
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/*
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* WARNING: if you change the order of this enumeration,
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* grep "ORDER GIM"
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*/
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typedef enum {
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GIM_ERROR = 0,
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GIM_GETGLOBAL,
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GIM_SETGLOBAL
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} IMGS;
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#define GIM_ERROR 0
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#define GIM_GETGLOBAL 1
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#define GIM_SETGLOBAL 2
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#define GIM_N 3
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void luaI_setfallback (void);
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@ -30,11 +55,12 @@ void luaI_travlock (int (*fn)(Object *));
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void luaI_invalidaterefs (void);
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char *luaI_travfallbacks (int (*fn)(Object *));
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void luaI_type (void);
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void luaI_settag (int tag, Object *o);
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lua_Type luaI_typetag (int tag);
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Object *luaI_getim (int tag, int event);
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Object *luaI_getgim (int event);
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Object *luaI_getimbyObj (Object *o, int event);
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Object *luaI_getim (int tag, IMS event);
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Object *luaI_getgim (IMGS event);
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Object *luaI_getimbyObj (Object *o, IMS event);
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int luaI_tag (Object *o);
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void luaI_setintmethod (void);
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void luaI_setglobalmethod (void);
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40
opcode.c
40
opcode.c
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@ -3,7 +3,7 @@
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** TecCGraf - PUC-Rio
|
||||
*/
|
||||
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char *rcs_opcode="$Id: opcode.c,v 3.84 1997/03/11 18:44:28 roberto Exp roberto $";
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char *rcs_opcode="$Id: opcode.c,v 3.85 1997/03/19 19:41:10 roberto Exp roberto $";
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#include <setjmp.h>
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#include <stdio.h>
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@ -1006,18 +1006,18 @@ void luaI_gcIM (Object *o)
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}
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static void call_arith (char *op)
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static void call_arith (IMS event)
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{
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Object *im = luaI_getimbyObj(top-2, IM_ARITH); /* try first operand */
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Object *im = luaI_getimbyObj(top-2, event); /* try first operand */
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if (ttype(im) == LUA_T_NIL) {
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im = luaI_getimbyObj(top-1, IM_ARITH); /* try second operand */
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im = luaI_getimbyObj(top-1, event); /* try second operand */
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||||
if (ttype(im) == LUA_T_NIL) {
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im = luaI_getim(0, IM_ARITH); /* try a 'global' i.m. */
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im = luaI_getim(0, event); /* try a 'global' i.m. */
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||||
if (ttype(im) == LUA_T_NIL)
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lua_error("unexpected type at conversion to number");
|
||||
}
|
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}
|
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lua_pushstring(op);
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||||
lua_pushstring(luaI_eventname[event]);
|
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callIM(im, 3, 1);
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}
|
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|
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@ -1029,17 +1029,17 @@ static void concim (Object *o)
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callIM(im, 2, 1);
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}
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|
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static void ordim (Object *o, char *op)
|
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static void ordim (Object *o, IMS event)
|
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{
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Object *im = luaI_getimbyObj(o, IM_ORDER);
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Object *im = luaI_getimbyObj(o, event);
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if (ttype(im) == LUA_T_NIL)
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lua_error("unexpected type at comparison");
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lua_pushstring(op);
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lua_pushstring(luaI_eventname[event]);
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callIM(im, 3, 1);
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}
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|
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static void comparison (lua_Type ttype_less, lua_Type ttype_equal,
|
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lua_Type ttype_great, char *op)
|
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lua_Type ttype_great, IMS op)
|
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{
|
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Object *l = top-2;
|
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Object *r = top-1;
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|
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@ -1292,19 +1292,19 @@ static StkId lua_execute (Byte *pc, StkId base)
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break;
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case LTOP:
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comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, "lt");
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||||
comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, IM_LT);
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break;
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case LEOP:
|
||||
comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, "le");
|
||||
comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, IM_LE);
|
||||
break;
|
||||
|
||||
case GTOP:
|
||||
comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, "gt");
|
||||
comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, IM_GT);
|
||||
break;
|
||||
|
||||
case GEOP:
|
||||
comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, "ge");
|
||||
comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, IM_GE);
|
||||
break;
|
||||
|
||||
case ADDOP:
|
||||
|
|
@ -1312,7 +1312,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
Object *l = top-2;
|
||||
Object *r = top-1;
|
||||
if (tonumber(r) || tonumber(l))
|
||||
call_arith("add");
|
||||
call_arith(IM_ADD);
|
||||
else
|
||||
{
|
||||
nvalue(l) += nvalue(r);
|
||||
|
|
@ -1326,7 +1326,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
Object *l = top-2;
|
||||
Object *r = top-1;
|
||||
if (tonumber(r) || tonumber(l))
|
||||
call_arith("sub");
|
||||
call_arith(IM_SUB);
|
||||
else
|
||||
{
|
||||
nvalue(l) -= nvalue(r);
|
||||
|
|
@ -1340,7 +1340,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
Object *l = top-2;
|
||||
Object *r = top-1;
|
||||
if (tonumber(r) || tonumber(l))
|
||||
call_arith("mul");
|
||||
call_arith(IM_MUL);
|
||||
else
|
||||
{
|
||||
nvalue(l) *= nvalue(r);
|
||||
|
|
@ -1354,7 +1354,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
Object *l = top-2;
|
||||
Object *r = top-1;
|
||||
if (tonumber(r) || tonumber(l))
|
||||
call_arith("div");
|
||||
call_arith(IM_DIV);
|
||||
else
|
||||
{
|
||||
nvalue(l) /= nvalue(r);
|
||||
|
|
@ -1364,7 +1364,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
break;
|
||||
|
||||
case POWOP:
|
||||
call_arith("pow");
|
||||
call_arith(IM_POW);
|
||||
break;
|
||||
|
||||
case CONCOP: {
|
||||
|
|
@ -1386,7 +1386,7 @@ static StkId lua_execute (Byte *pc, StkId base)
|
|||
{
|
||||
ttype(top) = LUA_T_NIL;
|
||||
incr_top;
|
||||
call_arith("unm");
|
||||
call_arith(IM_UNM);
|
||||
}
|
||||
else
|
||||
nvalue(top-1) = - nvalue(top-1);
|
||||
|
|
|
|||
6
opcode.h
6
opcode.h
|
|
@ -1,6 +1,6 @@
|
|||
/*
|
||||
** TeCGraf - PUC-Rio
|
||||
** $Id: opcode.h,v 3.28 1997/03/11 18:44:28 roberto Exp roberto $
|
||||
** $Id: opcode.h,v 3.29 1997/03/19 19:41:10 roberto Exp roberto $
|
||||
*/
|
||||
|
||||
#ifndef opcode_h
|
||||
|
|
@ -14,6 +14,10 @@
|
|||
|
||||
#define FIELDS_PER_FLUSH 40
|
||||
|
||||
/*
|
||||
* WARNING: if you change the order of this enumeration,
|
||||
* grep "ORDER LUA_T"
|
||||
*/
|
||||
typedef enum
|
||||
{
|
||||
LUA_T_NIL = -9,
|
||||
|
|
|
|||
Loading…
Reference in New Issue