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many details + code redistribution

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This commit is contained in:
Roberto Ierusalimschy
1999-12-14 16:33:29 -02:00
parent e6d56cd2d8
commit 1b15206cf9
13 changed files with 170 additions and 529 deletions
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245
lapi.c
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@@ -1,5 +1,5 @@
/*
** $Id: lapi.c,v 1.62 1999/12/02 16:24:45 roberto Exp roberto $
** $Id: lapi.c,v 1.63 1999/12/06 12:03:45 roberto Exp roberto $
** Lua API
** See Copyright Notice in lua.h
*/
@@ -22,16 +22,15 @@
#include "ltable.h"
#include "ltm.h"
#include "lua.h"
#include "luadebug.h"
#include "lvm.h"
const char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
"$Authors: " LUA_AUTHORS " $";
"$Authors: " LUA_AUTHORS " $";
static lua_Type normalized_type (const TObject *o) {
lua_Type luaA_normalizedtype (const TObject *o) {
int t = ttype(o);
switch (t) {
case LUA_T_PMARK:
@@ -46,24 +45,24 @@ static lua_Type normalized_type (const TObject *o) {
}
static void set_normalized (TObject *d, const TObject *s) {
void luaA_setnormalized (TObject *d, const TObject *s) {
d->value = s->value;
d->ttype = normalized_type(s);
d->ttype = luaA_normalizedtype(s);
}
static const TObject *luaA_protovalue (const TObject *o) {
return (normalized_type(o) == LUA_T_CLOSURE) ? protovalue(o) : o;
const TObject *luaA_protovalue (const TObject *o) {
return (luaA_normalizedtype(o) == LUA_T_CLOSURE) ? protovalue(o) : o;
}
static void checkCparams (lua_State *L, int nParams) {
void luaA_checkCparams (lua_State *L, int nParams) {
if (nParams > L->top-L->Cstack.base)
lua_error(L, "API error - wrong number of arguments in C2lua stack");
}
static lua_Object put_luaObject (lua_State *L, const TObject *o) {
lua_Object luaA_putluaObject (lua_State *L, const TObject *o) {
luaD_openstack(L, L->Cstack.base);
*L->Cstack.base++ = *o;
return L->Cstack.base-1;
@@ -86,7 +85,7 @@ static void top2LC (lua_State *L, int n) {
lua_Object lua_pop (lua_State *L) {
checkCparams(L, 1);
luaA_checkCparams(L, 1);
return luaA_putObjectOnTop(L);
}
@@ -106,19 +105,19 @@ int lua_callfunction (lua_State *L, lua_Object function) {
return 1;
else {
luaD_openstack(L, L->Cstack.base);
set_normalized(L->Cstack.base, function);
luaA_setnormalized(L->Cstack.base, function);
return luaD_protectedrun(L);
}
}
lua_Object lua_gettagmethod (lua_State *L, int tag, const char *event) {
return put_luaObject(L, luaT_gettagmethod(L, tag, event));
return luaA_putluaObject(L, luaT_gettagmethod(L, tag, event));
}
lua_Object lua_settagmethod (lua_State *L, int tag, const char *event) {
checkCparams(L, 1);
luaA_checkCparams(L, 1);
luaT_settagmethod(L, tag, event, L->top-1);
return luaA_putObjectOnTop(L);
}
@@ -126,7 +125,7 @@ lua_Object lua_settagmethod (lua_State *L, int tag, const char *event) {
lua_Object lua_seterrormethod (lua_State *L) {
lua_Object temp;
checkCparams(L, 1);
luaA_checkCparams(L, 1);
temp = lua_getglobal(L, "_ERRORMESSAGE");
lua_setglobal(L, "_ERRORMESSAGE");
return temp;
@@ -134,14 +133,14 @@ lua_Object lua_seterrormethod (lua_State *L) {
lua_Object lua_gettable (lua_State *L) {
checkCparams(L, 2);
luaA_checkCparams(L, 2);
luaV_gettable(L);
return luaA_putObjectOnTop(L);
}
lua_Object lua_rawgettable (lua_State *L) {
checkCparams(L, 2);
luaA_checkCparams(L, 2);
if (ttype(L->top-2) != LUA_T_ARRAY)
lua_error(L, "indexed expression not a table in rawgettable");
*(L->top-2) = *luaH_get(L, avalue(L->top-2), L->top-1);
@@ -151,14 +150,14 @@ lua_Object lua_rawgettable (lua_State *L) {
void lua_settable (lua_State *L) {
checkCparams(L, 3);
luaA_checkCparams(L, 3);
luaV_settable(L, L->top-3);
L->top -= 2; /* pop table and index */
}
void lua_rawsettable (lua_State *L) {
checkCparams(L, 3);
luaA_checkCparams(L, 3);
luaV_rawsettable(L, L->top-3);
}
@@ -168,12 +167,12 @@ lua_Object lua_createtable (lua_State *L) {
luaC_checkGC(L);
avalue(&o) = luaH_new(L, 0);
ttype(&o) = LUA_T_ARRAY;
return put_luaObject(L, &o);
return luaA_putluaObject(L, &o);
}
lua_Object lua_getglobal (lua_State *L, const char *name) {
luaD_checkstack(L, 2); /* may need that to call T.M. */
luaD_checkstack(L, 2); /* may need that to call a tag method */
luaV_getglobal(L, luaS_assertglobalbyname(L, name));
return luaA_putObjectOnTop(L);
}
@@ -181,27 +180,27 @@ lua_Object lua_getglobal (lua_State *L, const char *name) {
lua_Object lua_rawgetglobal (lua_State *L, const char *name) {
GlobalVar *gv = luaS_assertglobalbyname(L, name);
return put_luaObject(L, &gv->value);
return luaA_putluaObject(L, &gv->value);
}
void lua_setglobal (lua_State *L, const char *name) {
checkCparams(L, 1);
luaD_checkstack(L, 2); /* may need that to call T.M. */
luaA_checkCparams(L, 1);
luaD_checkstack(L, 2); /* may need that to call a tag method */
luaV_setglobal(L, luaS_assertglobalbyname(L, name));
}
void lua_rawsetglobal (lua_State *L, const char *name) {
GlobalVar *gv = luaS_assertglobalbyname(L, name);
checkCparams(L, 1);
luaA_checkCparams(L, 1);
gv->value = *(--L->top);
}
const char *lua_type (lua_State *L, lua_Object o) {
UNUSED(L);
return (o == LUA_NOOBJECT) ? "NOOBJECT" : luaO_typename(L, o);
return (o == LUA_NOOBJECT) ? "NOOBJECT" : luaO_typename(o);
}
int lua_isnil (lua_State *L, lua_Object o) {
@@ -220,7 +219,6 @@ int lua_isuserdata (lua_State *L, lua_Object o) {
}
int lua_iscfunction (lua_State *L, lua_Object o) {
UNUSED(L);
return (lua_tag(L, o) == LUA_T_CPROTO);
}
@@ -261,7 +259,6 @@ const char *lua_getstring (lua_State *L, lua_Object obj) {
}
long lua_strlen (lua_State *L, lua_Object obj) {
UNUSED(L);
if (obj == LUA_NOOBJECT || tostring(L, obj))
return 0L;
else return (tsvalue(obj)->u.s.len);
@@ -309,7 +306,7 @@ void lua_pushstring (lua_State *L, const char *s) {
void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
if (fn == NULL)
lua_error(L, "API error - attempt to push a NULL Cfunction");
checkCparams(L, n);
luaA_checkCparams(L, n);
ttype(L->top) = LUA_T_CPROTO;
fvalue(L->top) = fn;
incr_top;
@@ -334,7 +331,7 @@ void luaA_pushobject (lua_State *L, const TObject *o) {
void lua_pushobject (lua_State *L, lua_Object o) {
if (o == LUA_NOOBJECT)
lua_error(L, "API error - attempt to push a NOOBJECT");
set_normalized(L->top, o);
luaA_setnormalized(L->top, o);
incr_top;
}
@@ -368,7 +365,7 @@ int lua_tag (lua_State *L, lua_Object o) {
void lua_settag (lua_State *L, int tag) {
checkCparams(L, 1);
luaA_checkCparams(L, 1);
luaT_realtag(L, tag);
switch (ttype(L->top-1)) {
case LUA_T_ARRAY:
@@ -379,7 +376,7 @@ void lua_settag (lua_State *L, int tag) {
break;
default:
luaL_verror(L, "cannot change the tag of a %.20s",
luaO_typename(L, L->top-1));
luaO_typename(L->top-1));
}
L->top--;
}
@@ -442,187 +439,3 @@ int lua_next (lua_State *L, lua_Object t, int i) {
}
/*
** {======================================================
** To manipulate some state information
** =======================================================
*/
lua_LHFunction lua_setlinehook (lua_State *L, lua_LHFunction func) {
lua_LHFunction old = L->linehook;
L->linehook = func;
return old;
}
lua_CHFunction lua_setcallhook (lua_State *L, lua_CHFunction func) {
lua_CHFunction old = L->callhook;
L->callhook = func;
return old;
}
int lua_setdebug (lua_State *L, int debug) {
int old = L->debug;
L->debug = debug;
return old;
}
/* }====================================================== */
/*
** {======================================================
** Debug interface
** =======================================================
*/
lua_Function lua_stackedfunction (lua_State *L, int level) {
int i;
for (i = (L->top-1)-L->stack; i>=0; i--) {
int t = L->stack[i].ttype;
if (t == LUA_T_CLMARK || t == LUA_T_PMARK || t == LUA_T_CMARK)
if (level-- == 0)
return L->stack+i;
}
return LUA_NOOBJECT;
}
int lua_nups (lua_State *L, lua_Function f) {
UNUSED(L);
return (!f || normalized_type(f) != LUA_T_CLOSURE) ? 0 : f->value.cl->nelems;
}
int lua_currentline (lua_State *L, lua_Function f) {
return (f+1 < L->top && (f+1)->ttype == LUA_T_LINE) ? (f+1)->value.i : -1;
}
lua_Object lua_getlocal (lua_State *L, lua_Function f, int local_number,
const char **name) {
/* check whether `f' is a Lua function */
if (lua_tag(L, f) != LUA_T_PROTO)
return LUA_NOOBJECT;
else {
TProtoFunc *fp = luaA_protovalue(f)->value.tf;
*name = luaF_getlocalname(fp, local_number, lua_currentline(L, f));
if (*name) {
/* if "*name", there must be a LUA_T_LINE */
/* therefore, f+2 points to function base */
return put_luaObject(L, (f+2)+(local_number-1));
}
else
return LUA_NOOBJECT;
}
}
int lua_setlocal (lua_State *L, lua_Function f, int local_number) {
/* check whether `f' is a Lua function */
if (lua_tag(L, f) != LUA_T_PROTO)
return 0;
else {
TProtoFunc *fp = luaA_protovalue(f)->value.tf;
const char *name = luaF_getlocalname(fp, local_number,
lua_currentline(L, f));
checkCparams(L, 1);
--L->top;
if (name) {
/* if "name", there must be a LUA_T_LINE */
/* therefore, f+2 points to function base */
*((f+2)+(local_number-1)) = *L->top;
return 1;
}
else
return 0;
}
}
void lua_funcinfo (lua_State *L, lua_Object func,
const char **source, int *linedefined) {
if (!lua_isfunction(L, func))
lua_error(L, "API error - `funcinfo' called with a non-function value");
else {
const TObject *f = luaA_protovalue(func);
if (normalized_type(f) == LUA_T_PROTO) {
*source = tfvalue(f)->source->str;
*linedefined = tfvalue(f)->lineDefined;
}
else {
*source = "(C)";
*linedefined = -1;
}
}
}
static int checkfunc (lua_State *L, TObject *o) {
return luaO_equalObj(o, L->top);
}
const char *lua_getobjname (lua_State *L, lua_Object o, const char **name) {
/* try to find a name for given function */
GlobalVar *g;
set_normalized(L->top, o); /* to be used by `checkfunc' */
for (g=L->rootglobal; g; g=g->next) {
if (checkfunc(L, &g->value)) {
*name = g->name->str;
return "global";
}
}
/* not found: try tag methods */
if ((*name = luaT_travtagmethods(L, checkfunc)) != NULL)
return "tag-method";
else return ""; /* not found at all */
}
/* }====================================================== */
/*
** {======================================================
** BLOCK mechanism
** =======================================================
*/
void lua_beginblock (lua_State *L) {
luaM_growvector(L, L->Cblocks, L->numCblocks, 1, struct C_Lua_Stack,
"too many nested blocks", L->stacksize);
L->Cblocks[L->numCblocks] = L->Cstack;
L->numCblocks++;
}
void lua_endblock (lua_State *L) {
if (L->numCblocks <= 0)
lua_error(L, "API error - no block to end");
--L->numCblocks;
L->Cstack = L->Cblocks[L->numCblocks];
L->top = L->Cstack.base;
}
int lua_ref (lua_State *L, int lock) {
int ref;
checkCparams(L, 1);
ref = luaR_ref(L, L->top-1, lock);
L->top--;
return ref;
}
lua_Object lua_getref (lua_State *L, int ref) {
const TObject *o = luaR_getref(L, ref);
return (o ? put_luaObject(L, o) : LUA_NOOBJECT);
}
/* }====================================================== */