C++ rawtsvalue函数代码示例

static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
  int res;
  if (ttype(l) != ttype(r))
    return luaG_ordererror(L, l, r);
  else if (ttisnumber(l))
    return luai_numle(nvalue(l), nvalue(r));
  else if (ttisstring(l))
    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
  else 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;
  return luaG_ordererror(L, l, r);
}

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;
  if (ttype(l) != ttype(r))
    return luaG_ordererror(L, l, r);
  else if (ttisnumber(l))
    return luai_numlt(nvalue(l), nvalue(r));
  else if (ttisstring(l))
    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
#if LUA_WIDESTRING
  else if (ttiswstring(l))
    return l_wstrcmp(rawtwsvalue(l), rawtwsvalue(r)) < 0;
#endif /* LUA_WIDESTRING */
  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
    return res;
  return luaG_ordererror(L, l, r);
}

static void DumpConstants(const Proto* f, DumpState* D)
{
    int i,n=f->sizek;
    DumpInt(n,D);
    for (i=0; i<n; i++)
    {
        const TValue* o=&f->k[i];
        DumpChar(ttype(o),D);
        switch (ttype(o))
        {
        case LUA_TNIL:
            break;
        case LUA_TBOOLEAN:
            DumpChar(bvalue(o),D);
            break;
        case LUA_TNUMBER:
            DumpNumber(nvalue(o),D);
            break;
        case LUA_TSTRING:
            DumpString(rawtsvalue(o),D);
            break;
        default:
            lua_assert(0);			/* cannot happen */
            break;
        }
    }
    n=f->sizep;
    DumpInt(n,D);
    for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
}

static void DumpConstants(const ktap_proto *f, DumpState *D)
{
	int i, n = f->sizek;

	DumpInt(n, D);
	for (i = 0; i < n; i++) {
		const ktap_value* o=&f->k[i];
		DumpChar(ttypenv(o), D);
		switch (ttypenv(o)) {
		case KTAP_TNIL:
			break;
		case KTAP_TBOOLEAN:
			DumpChar(bvalue(o), D);
			break;
		case KTAP_TNUMBER:
			DumpNumber(nvalue(o), D);
			break;
		case KTAP_TSTRING:
			DumpString(rawtsvalue(o), D);
			break;
		default:
			printf("ktap: DumpConstants with unknown vaule type %d\n", ttypenv(o));
			ktap_assert(0);
		}
	}
	n = f->sizep;
	DumpInt(n, D);
	for (i = 0; i < n; i++)
		DumpFunction(f->p[i], D);
}

/*
 * main search function
 */
const Tvalue *kp_table_get(Table *t, const Tvalue *key)
{
	switch (ttype(key)) {
	case KTAP_TNIL:
		return ktap_nilobject;
	case KTAP_TSHRSTR:
		return kp_table_getstr(t, rawtsvalue(key));
	case KTAP_TNUMBER: {
		ktap_Number n = nvalue(key);
		int k = (int)n;
		if ((ktap_Number)k == nvalue(key)) /* index is int? */
			return kp_table_getint(t, k);  /* use specialized version */
		/* else go through */
	}
	default: {
		Node *n = mainposition(t, key);
		do {  /* check whether `key' is somewhere in the chain */
			if (rawequalobj(gkey(n), key))
				return gval(n);  /* that's it */
			else
				n = gnext(n);
		} while (n);

		return ktap_nilobject;
	}
	}
}

/*
** 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));
    }
}

int debug_getsize(lua_State* L)
{
  TValue* o = L->base;
  switch (o->tt) {
    /* Container types */
    case LUA_TTABLE: {
      Table *h = hvalue(o);
      lua_pushinteger(L, sizeof(Table) + sizeof(TValue) * h->sizearray +
                             sizeof(Node) * sizenode(h));
      break;
    }
    case LUA_TFUNCTION: {
      Closure *cl = clvalue(o);
      lua_pushinteger(L, (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) :
                           sizeLclosure(cl->l.nupvalues));
      break;
    }
    case LUA_TTHREAD: {
      lua_State *th = thvalue(o);
      lua_pushinteger(L, sizeof(lua_State) + sizeof(TValue) * th->stacksize +
                                 sizeof(CallInfo) * th->size_ci);
      break;
    }
    case LUA_TPROTO: {
      Proto *p = pvalue(o);
      lua_pushinteger(L, sizeof(Proto) + sizeof(Instruction) * p->sizecode +
                             sizeof(Proto *) * p->sizep +
                             sizeof(TValue) * p->sizek + 
                             sizeof(int) * p->sizelineinfo +
                             sizeof(LocVar) * p->sizelocvars +
                             sizeof(TString *) * p->sizeupvalues);
     break;
    }
    /* Non-containers */
    case LUA_TUSERDATA: {
      lua_pushnumber(L, uvalue(o)->len);
      break;
    }
    case LUA_TLIGHTUSERDATA: {
      lua_pushnumber(L, sizeof(void*));
      break;
    }
    case LUA_TSTRING: {
      TString *s = rawtsvalue(o);
      lua_pushinteger(L, sizeof(TString) + s->tsv.len + 1);
      break;
    }
    case LUA_TNUMBER: {
      lua_pushinteger(L, sizeof(lua_Number));
      break;
    }
    case LUA_TBOOLEAN: {
      lua_pushinteger(L, sizeof(int));
      break;
    }
    default: return 0;
  }
  return 1;
}

/*
** tells whether a key or value can be cleared from a weak
** table. Non-collectable objects are never removed from weak
** tables. Strings behave as `values', so are never removed too. for
** other objects: if really collected, cannot keep them; for objects
** being finalized, keep them in keys, but not in values
*/
static int iscleared (const TValue *o) {
  if (!iscollectable(o)) return 0;
  else if (ttisstring(o)) {
    stringmark(rawtsvalue(o));  /* strings are `values', so are never weak */
    return 0;
  }
  else return iswhite(gcvalue(o));
}

/*
** tells whether a key or value can be cleared from a weak
** table. Non-collectable objects are never removed from weak
** tables. Strings behave as `values', so are never removed too. for
** other objects: if really collected, cannot keep them; for objects
** being finalized, keep them in keys, but not in values
*/
static int iscleared (global_State *g, const TValue *o) {
	if (!iscollectable(o)) return 0;
	else if (ttisstring(o)) {
	markobject(g, rawtsvalue(o));  /* strings are `values', so are never weak */
	return 0;
	}
	else return iswhite(gcvalue(o));
}

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);
}

TString *createString(lua_State *luaState, const char *str, size_t len) {
	TString *res;
	lua_pushlstring(luaState, str, len);

	res = rawtsvalue(luaState->top - 1);
	lua_pop(luaState, 1);

	return res;
}

/*
** The next function tells whether a key or value can be cleared from
** a weak table. Non-collectable objects are never removed from weak
** tables. Strings behave as `values', so are never removed too. for
** other objects: if really collected, cannot keep them; for userdata
** being finalized, keep them in keys, but not in values
*/
static int iscleared (const TValue *o, int iskey) {
  if (!iscollectable(o)) return 0;
  if (ttisstring(o)) {
    stringmark(rawtsvalue(o));  /* strings are `values', so are never weak */
    return 0;
  }
  return iswhite(gcvalue(o)) ||
    (ttisuserdata(o) && (!iskey && isfinalized(uvalue(o))));
}

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);
}

const ktap_val_t *kp_tab_getstr(ktap_tab_t *t, const ktap_str_t *ts)
{
	int i;

	for (i = 0; i <= t->hmask; i++) {
		ktap_val_t *v = gkey(gnode(t, i));
		if (is_string(v) && (ts == rawtsvalue(v)))
			return gval(gnode(t, i));
	}

	return niltv;
}