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"const" !!!

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This commit is contained in:
Roberto Ierusalimschy
1999-08-16 17:52:00 -03:00
parent b44e35b773
commit c787dccd9b
40 changed files with 442 additions and 516 deletions
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155
lapi.c
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@@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 1.46 1999/06/17 17:04:03 roberto Exp roberto $
** $Id: lapi.c,v 1.47 1999/06/22 20:37:23 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -24,8 +24,8 @@
#include "lvm.h"
char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
"$Authors: " LUA_AUTHORS " $";
const char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
"$Authors: " LUA_AUTHORS " $";
@@ -34,8 +34,7 @@ TObject *luaA_Address (lua_Object o) {
}
static lua_Type normalized_type (TObject *o)
{
static lua_Type normalized_type (const TObject *o) {
int t = ttype(o);
switch (t) {
case LUA_T_PMARK:
@@ -50,21 +49,18 @@ static lua_Type normalized_type (TObject *o)
}
static void set_normalized (TObject *d, TObject *s)
{
static void set_normalized (TObject *d, const TObject *s) {
d->value = s->value;
d->ttype = normalized_type(s);
}
static TObject *luaA_protovalue (TObject *o)
{
static const TObject *luaA_protovalue (const TObject *o) {
return (normalized_type(o) == LUA_T_CLOSURE) ? protovalue(o) : o;
}
void luaA_packresults (void)
{
void luaA_packresults (void) {
luaV_pack(L->Cstack.lua2C, L->Cstack.num, L->stack.top);
incr_top;
}
@@ -76,14 +72,13 @@ int luaA_passresults (void) {
}
static void checkCparams (int nParams)
{
static void checkCparams (int nParams) {
if (L->stack.top-L->stack.stack < L->Cstack.base+nParams)
lua_error("API error - wrong number of arguments in C2lua stack");
}
static lua_Object put_luaObject (TObject *o) {
static lua_Object put_luaObject (const TObject *o) {
luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
L->stack.stack[L->Cstack.base++] = *o;
return L->Cstack.base; /* this is +1 real position (see Ref) */
@@ -115,8 +110,7 @@ lua_Object lua_pop (void) {
** Get a parameter, returning the object handle or LUA_NOOBJECT on error.
** 'number' must be 1 to get the first parameter.
*/
lua_Object lua_lua2C (int number)
{
lua_Object lua_lua2C (int number) {
if (number <= 0 || number > L->Cstack.num) return LUA_NOOBJECT;
/* Ref(L->stack.stack+(L->Cstack.lua2C+number-1)) ==
L->stack.stack+(L->Cstack.lua2C+number-1)-L->stack.stack+1 == */
@@ -124,8 +118,7 @@ lua_Object lua_lua2C (int number)
}
int lua_callfunction (lua_Object function)
{
int lua_callfunction (lua_Object function) {
if (function == LUA_NOOBJECT)
return 1;
else {
@@ -136,14 +129,12 @@ int lua_callfunction (lua_Object function)
}
lua_Object lua_gettagmethod (int tag, char *event)
{
lua_Object lua_gettagmethod (int tag, const char *event) {
return put_luaObject(luaT_gettagmethod(tag, event));
}
lua_Object lua_settagmethod (int tag, char *event)
{
lua_Object lua_settagmethod (int tag, const char *event) {
checkCparams(1);
luaT_settagmethod(tag, event, L->stack.top-1);
return put_luaObjectonTop();
@@ -159,8 +150,7 @@ lua_Object lua_seterrormethod (void) {
}
lua_Object lua_gettable (void)
{
lua_Object lua_gettable (void) {
checkCparams(2);
luaV_gettable();
return put_luaObjectonTop();
@@ -190,8 +180,7 @@ void lua_rawsettable (void) {
}
lua_Object lua_createtable (void)
{
lua_Object lua_createtable (void) {
TObject o;
luaC_checkGC();
avalue(&o) = luaH_new(0);
@@ -200,31 +189,27 @@ lua_Object lua_createtable (void)
}
lua_Object lua_getglobal (char *name)
{
lua_Object lua_getglobal (const char *name) {
luaD_checkstack(2); /* may need that to call T.M. */
luaV_getglobal(luaS_new(name));
return put_luaObjectonTop();
}
lua_Object lua_rawgetglobal (char *name)
{
lua_Object lua_rawgetglobal (const char *name) {
TaggedString *ts = luaS_new(name);
return put_luaObject(&ts->u.s.globalval);
}
void lua_setglobal (char *name)
{
void lua_setglobal (const char *name) {
checkCparams(1);
luaD_checkstack(2); /* may need that to call T.M. */
luaV_setglobal(luaS_new(name));
}
void lua_rawsetglobal (char *name)
{
void lua_rawsetglobal (const char *name) {
TaggedString *ts = luaS_new(name);
checkCparams(1);
luaS_rawsetglobal(ts, --L->stack.top);
@@ -232,113 +217,96 @@ void lua_rawsetglobal (char *name)
int lua_isnil (lua_Object o)
{
int lua_isnil (lua_Object o) {
return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_NIL);
}
int lua_istable (lua_Object o)
{
int lua_istable (lua_Object o) {
return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_ARRAY);
}
int lua_isuserdata (lua_Object o)
{
int lua_isuserdata (lua_Object o) {
return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_USERDATA);
}
int lua_iscfunction (lua_Object o)
{
int lua_iscfunction (lua_Object o) {
return (lua_tag(o) == LUA_T_CPROTO);
}
int lua_isnumber (lua_Object o)
{
int lua_isnumber (lua_Object o) {
return (o!= LUA_NOOBJECT) && (tonumber(Address(o)) == 0);
}
int lua_isstring (lua_Object o)
{
int lua_isstring (lua_Object o) {
int t = lua_tag(o);
return (t == LUA_T_STRING) || (t == LUA_T_NUMBER);
}
int lua_isfunction (lua_Object o)
{
int lua_isfunction (lua_Object o) {
int t = lua_tag(o);
return (t == LUA_T_PROTO) || (t == LUA_T_CPROTO);
}
double lua_getnumber (lua_Object object)
{
double lua_getnumber (lua_Object object) {
if (object == LUA_NOOBJECT) return 0.0;
if (tonumber(Address(object))) return 0.0;
else return (nvalue(Address(object)));
}
char *lua_getstring (lua_Object object)
{
const char *lua_getstring (lua_Object object) {
luaC_checkGC(); /* "tostring" may create a new string */
if (object == LUA_NOOBJECT || tostring(Address(object)))
return NULL;
else return (svalue(Address(object)));
}
long lua_strlen (lua_Object object)
{
long lua_strlen (lua_Object object) {
luaC_checkGC(); /* "tostring" may create a new string */
if (object == LUA_NOOBJECT || tostring(Address(object)))
return 0L;
else return (tsvalue(Address(object))->u.s.len);
}
void *lua_getuserdata (lua_Object object)
{
void *lua_getuserdata (lua_Object object) {
if (object == LUA_NOOBJECT || ttype(Address(object)) != LUA_T_USERDATA)
return NULL;
else return tsvalue(Address(object))->u.d.v;
}
lua_CFunction lua_getcfunction (lua_Object object)
{
lua_CFunction lua_getcfunction (lua_Object object) {
if (!lua_iscfunction(object))
return NULL;
else return fvalue(luaA_protovalue(Address(object)));
}
void lua_pushnil (void)
{
void lua_pushnil (void) {
ttype(L->stack.top) = LUA_T_NIL;
incr_top;
}
void lua_pushnumber (double n)
{
void lua_pushnumber (double n) {
ttype(L->stack.top) = LUA_T_NUMBER;
nvalue(L->stack.top) = n;
incr_top;
}
void lua_pushlstring (char *s, long len)
{
void lua_pushlstring (const char *s, long len) {
tsvalue(L->stack.top) = luaS_newlstr(s, len);
ttype(L->stack.top) = LUA_T_STRING;
incr_top;
luaC_checkGC();
}
void lua_pushstring (char *s)
{
void lua_pushstring (const char *s) {
if (s == NULL)
lua_pushnil();
else
lua_pushlstring(s, strlen(s));
}
void lua_pushcclosure (lua_CFunction fn, int n)
{
void lua_pushcclosure (lua_CFunction fn, int n) {
if (fn == NULL)
lua_error("API error - attempt to push a NULL Cfunction");
checkCparams(n);
@@ -349,8 +317,7 @@ void lua_pushcclosure (lua_CFunction fn, int n)
luaC_checkGC();
}
void lua_pushusertag (void *u, int tag)
{
void lua_pushusertag (void *u, int tag) {
if (tag < 0 && tag != LUA_ANYTAG)
luaT_realtag(tag); /* error if tag is not valid */
tsvalue(L->stack.top) = luaS_createudata(u, tag);
@@ -359,8 +326,7 @@ void lua_pushusertag (void *u, int tag)
luaC_checkGC();
}
void luaA_pushobject (TObject *o)
{
void luaA_pushobject (const TObject *o) {
*L->stack.top = *o;
incr_top;
}
@@ -373,12 +339,11 @@ void lua_pushobject (lua_Object o) {
}
int lua_tag (lua_Object lo)
{
int lua_tag (lua_Object lo) {
if (lo == LUA_NOOBJECT)
return LUA_T_NIL;
else {
TObject *o = Address(lo);
const TObject *o = Address(lo);
int t;
switch (t = ttype(o)) {
case LUA_T_USERDATA:
@@ -402,8 +367,7 @@ int lua_tag (lua_Object lo)
}
void lua_settag (int tag)
{
void lua_settag (int tag) {
checkCparams(1);
luaT_realtag(tag);
switch (ttype(L->stack.top-1)) {
@@ -440,7 +404,7 @@ TaggedString *luaA_nextvar (TaggedString *g) {
}
char *lua_nextvar (char *varname) {
const char *lua_nextvar (const char *varname) {
TaggedString *g = (varname == NULL) ? NULL : luaS_new(varname);
g = luaA_nextvar(g);
if (g) {
@@ -454,7 +418,7 @@ char *lua_nextvar (char *varname) {
}
int luaA_next (Hash *t, int i) {
int luaA_next (const Hash *t, int i) {
int tsize = nhash(t);
for (; i<tsize; i++) {
Node *n = node(t, i);
@@ -469,7 +433,7 @@ int luaA_next (Hash *t, int i) {
int lua_next (lua_Object o, int i) {
TObject *t = Address(o);
const TObject *t = Address(o);
if (ttype(t) != LUA_T_ARRAY)
lua_error("API error - object is not a table in `lua_next'");
i = luaA_next(avalue(t), i);
@@ -519,8 +483,7 @@ int lua_setdebug (int debug) {
*/
lua_Function lua_stackedfunction (int level)
{
lua_Function lua_stackedfunction (int level) {
StkId i;
for (i = (L->stack.top-1)-L->stack.stack; i>=0; i--) {
int t = L->stack.stack[i].ttype;
@@ -533,20 +496,20 @@ lua_Function lua_stackedfunction (int level)
int lua_nups (lua_Function func) {
TObject *o = luaA_Address(func);
const TObject *o = luaA_Address(func);
return (!o || normalized_type(o) != LUA_T_CLOSURE) ? 0 : o->value.cl->nelems;
}
int lua_currentline (lua_Function func)
{
TObject *f = Address(func);
int lua_currentline (lua_Function func) {
const TObject *f = Address(func);
return (f+1 < L->stack.top && (f+1)->ttype == LUA_T_LINE) ?
(f+1)->value.i : -1;
}
lua_Object lua_getlocal (lua_Function func, int local_number, char **name) {
lua_Object lua_getlocal (lua_Function func, int local_number,
const char **name) {
/* check whether func is a Lua function */
if (lua_tag(func) != LUA_T_PROTO)
return LUA_NOOBJECT;
@@ -565,15 +528,14 @@ lua_Object lua_getlocal (lua_Function func, int local_number, char **name) {
}
int lua_setlocal (lua_Function func, int local_number)
{
int lua_setlocal (lua_Function func, int local_number) {
/* check whether func is a Lua function */
if (lua_tag(func) != LUA_T_PROTO)
return 0;
else {
TObject *f = Address(func);
TProtoFunc *fp = luaA_protovalue(f)->value.tf;
char *name = luaF_getlocalname(fp, local_number, lua_currentline(func));
const char *name = luaF_getlocalname(fp, local_number, lua_currentline(func));
checkCparams(1);
--L->stack.top;
if (name) {
@@ -588,11 +550,11 @@ int lua_setlocal (lua_Function func, int local_number)
}
void lua_funcinfo (lua_Object func, char **source, int *linedefined) {
void lua_funcinfo (lua_Object func, const char **source, int *linedefined) {
if (!lua_isfunction(func))
lua_error("API error - `funcinfo' called with a non-function value");
else {
TObject *f = luaA_protovalue(Address(func));
const TObject *f = luaA_protovalue(Address(func));
if (normalized_type(f) == LUA_T_PROTO) {
*source = tfvalue(f)->source->str;
*linedefined = tfvalue(f)->lineDefined;
@@ -605,14 +567,13 @@ void lua_funcinfo (lua_Object func, char **source, int *linedefined) {
}
static int checkfunc (TObject *o)
{
static int checkfunc (TObject *o) {
return luaO_equalObj(o, L->stack.top);
}
char *lua_getobjname (lua_Object o, char **name)
{ /* try to find a name for given function */
const char *lua_getobjname (lua_Object o, const char **name) {
/* try to find a name for given function */
set_normalized(L->stack.top, Address(o)); /* to be accessed by "checkfunc" */
if ((*name = luaS_travsymbol(checkfunc)) != NULL)
return "global";
@@ -662,7 +623,7 @@ int lua_ref (int lock) {
lua_Object lua_getref (int ref) {
TObject *o = luaC_getref(ref);
const TObject *o = luaC_getref(ref);
return (o ? put_luaObject(o) : LUA_NOOBJECT);
}