diff options
author | pixel <pixel> | 2007-07-27 10:05:52 +0000 |
---|---|---|
committer | pixel <pixel> | 2007-07-27 10:05:52 +0000 |
commit | 6c1ab7da376ae7f78a075dda5c5be0dabce20931 (patch) | |
tree | bc44e447c450c96140cf6b63c39a37afa8ba61fb /lib/lua/src/lapi.c | |
parent | a68385b1043a2041390f65ce5cf9ed434af5e95d (diff) |
Upgrading to Lua-5.1.2
Diffstat (limited to 'lib/lua/src/lapi.c')
-rw-r--r-- | lib/lua/src/lapi.c | 648 |
1 files changed, 403 insertions, 245 deletions
diff --git a/lib/lua/src/lapi.c b/lib/lua/src/lapi.c index 7298b87..e456c8f 100644 --- a/lib/lua/src/lapi.c +++ b/lib/lua/src/lapi.c @@ -1,14 +1,17 @@ /* -** $Id: lapi.c,v 1.5 2007-07-25 16:54:32 pixel Exp $ +** $Id: lapi.c,v 1.6 2007-07-27 10:05:53 pixel Exp $ ** Lua API ** See Copyright Notice in lua.h */ #include <assert.h> +#include <math.h> +#include <stdarg.h> #include <string.h> #define lapi_c +#define LUA_CORE #include "lua.h" @@ -27,79 +30,72 @@ #include "lvm.h" + const char lua_ident[] = - "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n" + "$Lua: " LUA_RELEASE " " LUA_COPYRIGHT " $\n" "$Authors: " LUA_AUTHORS " $\n" "$URL: www.lua.org $\n"; -#ifndef api_check -#define api_check(L, o) /*{ assert(o); }*/ -#endif - #define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base)) -#define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;} +#define api_checkvalidindex(L, i) api_check(L, (i) != luaO_nilobject) +#define api_incr_top(L) {api_check(L, L->top < L->ci->top); L->top++;} -static TObject *negindex (lua_State *L, int idx) { - if (idx > LUA_REGISTRYINDEX) { +static TValue *index2adr (lua_State *L, int idx) { + if (idx > 0) { + TValue *o = L->base + (idx - 1); + api_check(L, idx <= L->ci->top - L->base); + if (o >= L->top) return cast(TValue *, luaO_nilobject); + else return o; + } + else if (idx > LUA_REGISTRYINDEX) { api_check(L, idx != 0 && -idx <= L->top - L->base); - return L->top+idx; + return L->top + idx; } else switch (idx) { /* pseudo-indices */ case LUA_REGISTRYINDEX: return registry(L); + case LUA_ENVIRONINDEX: { + Closure *func = curr_func(L); + sethvalue(L, &L->env, func->c.env); + return &L->env; + } case LUA_GLOBALSINDEX: return gt(L); default: { - TObject *func = (L->base - 1); + Closure *func = curr_func(L); idx = LUA_GLOBALSINDEX - idx; - lua_assert(iscfunction(func)); - return (idx <= clvalue(func)->c.nupvalues) - ? &clvalue(func)->c.upvalue[idx-1] - : NULL; + return (idx <= func->c.nupvalues) + ? &func->c.upvalue[idx-1] + : cast(TValue *, luaO_nilobject); } } } -static TObject *luaA_index (lua_State *L, int idx) { - if (idx > 0) { - api_check(L, idx <= L->top - L->base); - return L->base + idx - 1; - } +static Table *getcurrenv (lua_State *L) { + if (L->ci == L->base_ci) /* no enclosing function? */ + return hvalue(gt(L)); /* use global table as environment */ else { - TObject *o = negindex(L, idx); - api_check(L, o != NULL); - return o; + Closure *func = curr_func(L); + return func->c.env; } } -static TObject *luaA_indexAcceptable (lua_State *L, int idx) { - if (idx > 0) { - TObject *o = L->base+(idx-1); - api_check(L, idx <= L->stack_last - L->base); - if (o >= L->top) return NULL; - else return o; - } - else - return negindex(L, idx); -} - - -void luaA_pushobject (lua_State *L, const TObject *o) { - setobj2s(L->top, o); - incr_top(L); +void luaA_pushobject (lua_State *L, const TValue *o) { + setobj2s(L, L->top, o); + api_incr_top(L); } LUA_API int lua_checkstack (lua_State *L, int size) { int res; lua_lock(L); - if ((L->top - L->base + size) > LUA_MAXCSTACK) + if ((L->top - L->base + size) > LUAI_MAXCSTACK) res = 0; /* stack overflow */ else { luaD_checkstack(L, size); @@ -114,12 +110,14 @@ LUA_API int lua_checkstack (lua_State *L, int size) { LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) { int i; + if (from == to) return; lua_lock(to); api_checknelems(from, n); + api_check(from, G(from) == G(to)); + api_check(from, to->ci->top - to->top >= n); from->top -= n; for (i = 0; i < n; i++) { - setobj2s(to->top, from->top + i); - api_incr_top(to); + setobj2s(to, to->top++, from->top + i); } lua_unlock(to); } @@ -140,10 +138,10 @@ LUA_API lua_State *lua_newthread (lua_State *L) { lua_lock(L); luaC_checkGC(L); L1 = luaE_newthread(L); - setthvalue(L->top, L1); + setthvalue(L, L->top, L1); api_incr_top(L); lua_unlock(L); - lua_userstateopen(L1); + luai_userstatethread(L, L1); return L1; } @@ -155,7 +153,7 @@ LUA_API lua_State *lua_newthread (lua_State *L) { LUA_API int lua_gettop (lua_State *L) { - return (L->top - L->base); + return cast_int(L->top - L->base); } @@ -178,8 +176,9 @@ LUA_API void lua_settop (lua_State *L, int idx) { LUA_API void lua_remove (lua_State *L, int idx) { StkId p; lua_lock(L); - p = luaA_index(L, idx); - while (++p < L->top) setobjs2s(p-1, p); + p = index2adr(L, idx); + api_checkvalidindex(L, p); + while (++p < L->top) setobjs2s(L, p-1, p); L->top--; lua_unlock(L); } @@ -189,17 +188,34 @@ LUA_API void lua_insert (lua_State *L, int idx) { StkId p; StkId q; lua_lock(L); - p = luaA_index(L, idx); - for (q = L->top; q>p; q--) setobjs2s(q, q-1); - setobjs2s(p, L->top); + p = index2adr(L, idx); + api_checkvalidindex(L, p); + for (q = L->top; q>p; q--) setobjs2s(L, q, q-1); + setobjs2s(L, p, L->top); lua_unlock(L); } LUA_API void lua_replace (lua_State *L, int idx) { + StkId o; lua_lock(L); + /* explicit test for incompatible code */ + if (idx == LUA_ENVIRONINDEX && L->ci == L->base_ci) + luaG_runerror(L, "no calling environment"); api_checknelems(L, 1); - setobj(luaA_index(L, idx), L->top - 1); /* write barrier */ + o = index2adr(L, idx); + api_checkvalidindex(L, o); + if (idx == LUA_ENVIRONINDEX) { + Closure *func = curr_func(L); + api_check(L, ttistable(L->top - 1)); + func->c.env = hvalue(L->top - 1); + luaC_barrier(L, func, L->top - 1); + } + else { + setobj(L, o, L->top - 1); + if (idx < LUA_GLOBALSINDEX) /* function upvalue? */ + luaC_barrier(L, curr_func(L), L->top - 1); + } L->top--; lua_unlock(L); } @@ -207,7 +223,7 @@ LUA_API void lua_replace (lua_State *L, int idx) { LUA_API void lua_pushvalue (lua_State *L, int idx) { lua_lock(L); - setobj2s(L->top, luaA_index(L, idx)); + setobj2s(L, L->top, index2adr(L, idx)); api_incr_top(L); lua_unlock(L); } @@ -220,8 +236,8 @@ LUA_API void lua_pushvalue (lua_State *L, int idx) { LUA_API int lua_type (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL) ? LUA_TNONE : ttype(o); + StkId o = index2adr(L, idx); + return (o == luaO_nilobject) ? LUA_TNONE : ttype(o); } @@ -232,15 +248,15 @@ LUA_API const char *lua_typename (lua_State *L, int t) { LUA_API int lua_iscfunction (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL) ? 0 : iscfunction(o); + StkId o = index2adr(L, idx); + return iscfunction(o); } LUA_API int lua_isnumber (lua_State *L, int idx) { - TObject n; - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL && tonumber(o, &n)); + TValue n; + const TValue *o = index2adr(L, idx); + return tonumber(o, &n); } @@ -251,16 +267,16 @@ LUA_API int lua_isstring (lua_State *L, int idx) { LUA_API int lua_isuserdata (lua_State *L, int idx) { - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL && (ttisuserdata(o) || ttislightuserdata(o))); + const TValue *o = index2adr(L, idx); + return (ttisuserdata(o) || ttislightuserdata(o)); } LUA_API int lua_rawequal (lua_State *L, int index1, int index2) { - StkId o1 = luaA_indexAcceptable(L, index1); - StkId o2 = luaA_indexAcceptable(L, index2); - return (o1 == NULL || o2 == NULL) ? 0 /* index out of range */ - : luaO_rawequalObj(o1, o2); + StkId o1 = index2adr(L, index1); + StkId o2 = index2adr(L, index2); + return (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 + : luaO_rawequalObj(o1, o2); } @@ -268,10 +284,9 @@ LUA_API int lua_equal (lua_State *L, int index1, int index2) { StkId o1, o2; int i; lua_lock(L); /* may call tag method */ - o1 = luaA_indexAcceptable(L, index1); - o2 = luaA_indexAcceptable(L, index2); - i = (o1 == NULL || o2 == NULL) ? 0 /* index out of range */ - : equalobj(L, o1, o2); + o1 = index2adr(L, index1); + o2 = index2adr(L, index2); + i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 : equalobj(L, o1, o2); lua_unlock(L); return i; } @@ -281,10 +296,10 @@ LUA_API int lua_lessthan (lua_State *L, int index1, int index2) { StkId o1, o2; int i; lua_lock(L); /* may call tag method */ - o1 = luaA_indexAcceptable(L, index1); - o2 = luaA_indexAcceptable(L, index2); - i = (o1 == NULL || o2 == NULL) ? 0 /* index out-of-range */ - : luaV_lessthan(L, o1, o2); + o1 = index2adr(L, index1); + o2 = index2adr(L, index2); + i = (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0 + : luaV_lessthan(L, o1, o2); lua_unlock(L); return i; } @@ -292,65 +307,81 @@ LUA_API int lua_lessthan (lua_State *L, int index1, int index2) { LUA_API lua_Number lua_tonumber (lua_State *L, int idx) { - TObject n; - const TObject *o = luaA_indexAcceptable(L, idx); - if (o != NULL && tonumber(o, &n)) + TValue n; + const TValue *o = index2adr(L, idx); + if (tonumber(o, &n)) return nvalue(o); else return 0; } +LUA_API lua_Integer lua_tointeger (lua_State *L, int idx) { + TValue n; + const TValue *o = index2adr(L, idx); + if (tonumber(o, &n)) { + lua_Integer res; + lua_Number num = nvalue(o); + lua_number2integer(res, num); + return res; + } + else + return 0; +} + + LUA_API int lua_toboolean (lua_State *L, int idx) { - const TObject *o = luaA_indexAcceptable(L, idx); - return (o != NULL) && !l_isfalse(o); + const TValue *o = index2adr(L, idx); + return !l_isfalse(o); } -LUA_API const char *lua_tostring (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) - return NULL; - else if (ttisstring(o)) - return svalue(o); - else { - const char *s; +LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) { + StkId o = index2adr(L, idx); + if (!ttisstring(o)) { lua_lock(L); /* `luaV_tostring' may create a new string */ - s = (luaV_tostring(L, o) ? svalue(o) : NULL); + if (!luaV_tostring(L, o)) { /* conversion failed? */ + if (len != NULL) *len = 0; + lua_unlock(L); + return NULL; + } luaC_checkGC(L); + o = index2adr(L, idx); /* previous call may reallocate the stack */ lua_unlock(L); - return s; } + if (len != NULL) *len = tsvalue(o)->len; + return svalue(o); } -LUA_API size_t lua_strlen (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) - return 0; - else if (ttisstring(o)) - return tsvalue(o)->tsv.len; - else { - size_t l; - lua_lock(L); /* `luaV_tostring' may create a new string */ - l = (luaV_tostring(L, o) ? tsvalue(o)->tsv.len : 0); - lua_unlock(L); - return l; +LUA_API size_t lua_objlen (lua_State *L, int idx) { + StkId o = index2adr(L, idx); + switch (ttype(o)) { + case LUA_TSTRING: return tsvalue(o)->len; + case LUA_TUSERDATA: return uvalue(o)->len; + case LUA_TTABLE: return luaH_getn(hvalue(o)); + case LUA_TNUMBER: { + size_t l; + lua_lock(L); /* `luaV_tostring' may create a new string */ + l = (luaV_tostring(L, o) ? tsvalue(o)->len : 0); + lua_unlock(L); + return l; + } + default: return 0; } } LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->c.f; + StkId o = index2adr(L, idx); + return (!iscfunction(o)) ? NULL : clvalue(o)->c.f; } LUA_API void *lua_touserdata (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) return NULL; + StkId o = index2adr(L, idx); switch (ttype(o)) { - case LUA_TUSERDATA: return (uvalue(o) + 1); + case LUA_TUSERDATA: return (rawuvalue(o) + 1); case LUA_TLIGHTUSERDATA: return pvalue(o); default: return NULL; } @@ -358,24 +389,21 @@ LUA_API void *lua_touserdata (lua_State *L, int idx) { LUA_API lua_State *lua_tothread (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - return (o == NULL || !ttisthread(o)) ? NULL : thvalue(o); + StkId o = index2adr(L, idx); + return (!ttisthread(o)) ? NULL : thvalue(o); } LUA_API const void *lua_topointer (lua_State *L, int idx) { - StkId o = luaA_indexAcceptable(L, idx); - if (o == NULL) return NULL; - else { - switch (ttype(o)) { - case LUA_TTABLE: return hvalue(o); - case LUA_TFUNCTION: return clvalue(o); - case LUA_TTHREAD: return thvalue(o); - case LUA_TUSERDATA: - case LUA_TLIGHTUSERDATA: - return lua_touserdata(L, idx); - default: return NULL; - } + StkId o = index2adr(L, idx); + switch (ttype(o)) { + case LUA_TTABLE: return hvalue(o); + case LUA_TFUNCTION: return clvalue(o); + case LUA_TTHREAD: return thvalue(o); + case LUA_TUSERDATA: + case LUA_TLIGHTUSERDATA: + return lua_touserdata(L, idx); + default: return NULL; } } @@ -402,10 +430,18 @@ LUA_API void lua_pushnumber (lua_State *L, lua_Number n) { } +LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) { + lua_lock(L); + setnvalue(L->top, cast_num(n)); + api_incr_top(L); + lua_unlock(L); +} + + LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) { lua_lock(L); luaC_checkGC(L); - setsvalue2s(L->top, luaS_newlstr(L, s, len)); + setsvalue2s(L, L->top, luaS_newlstr(L, s, len)); api_incr_top(L); lua_unlock(L); } @@ -448,12 +484,13 @@ LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) { lua_lock(L); luaC_checkGC(L); api_checknelems(L, n); - cl = luaF_newCclosure(L, n); + cl = luaF_newCclosure(L, n, getcurrenv(L)); cl->c.f = fn; L->top -= n; while (n--) - setobj2n(&cl->c.upvalue[n], L->top+n); - setclvalue(L->top, cl); + setobj2n(L, &cl->c.upvalue[n], L->top+n); + setclvalue(L, L->top, cl); + lua_assert(iswhite(obj2gco(cl))); api_incr_top(L); lua_unlock(L); } @@ -475,6 +512,15 @@ LUA_API void lua_pushlightuserdata (lua_State *L, void *p) { } +LUA_API int lua_pushthread (lua_State *L) { + lua_lock(L); + setthvalue(L, L->top, L); + api_incr_top(L); + lua_unlock(L); + return (G(L)->mainthread == L); +} + + /* ** get functions (Lua -> stack) @@ -484,8 +530,22 @@ LUA_API void lua_pushlightuserdata (lua_State *L, void *p) { LUA_API void lua_gettable (lua_State *L, int idx) { StkId t; lua_lock(L); - t = luaA_index(L, idx); - setobj2s(L->top - 1, luaV_gettable(L, t, L->top - 1, 0)); + t = index2adr(L, idx); + api_checkvalidindex(L, t); + luaV_gettable(L, t, L->top - 1, L->top - 1); + lua_unlock(L); +} + + +LUA_API void lua_getfield (lua_State *L, int idx, const char *k) { + StkId t; + TValue key; + lua_lock(L); + t = index2adr(L, idx); + api_checkvalidindex(L, t); + setsvalue(L, &key, luaS_new(L, k)); + luaV_gettable(L, t, &key, L->top); + api_incr_top(L); lua_unlock(L); } @@ -493,9 +553,9 @@ LUA_API void lua_gettable (lua_State *L, int idx) { LUA_API void lua_rawget (lua_State *L, int idx) { StkId t; lua_lock(L); - t = luaA_index(L, idx); + t = index2adr(L, idx); api_check(L, ttistable(t)); - setobj2s(L->top - 1, luaH_get(hvalue(t), L->top - 1)); + setobj2s(L, L->top - 1, luaH_get(hvalue(t), L->top - 1)); lua_unlock(L); } @@ -503,43 +563,44 @@ LUA_API void lua_rawget (lua_State *L, int idx) { LUA_API void lua_rawgeti (lua_State *L, int idx, int n) { StkId o; lua_lock(L); - o = luaA_index(L, idx); + o = index2adr(L, idx); api_check(L, ttistable(o)); - setobj2s(L->top, luaH_getnum(hvalue(o), n)); + setobj2s(L, L->top, luaH_getnum(hvalue(o), n)); api_incr_top(L); lua_unlock(L); } -LUA_API void lua_newtable (lua_State *L) { +LUA_API void lua_createtable (lua_State *L, int narray, int nrec) { lua_lock(L); luaC_checkGC(L); - sethvalue(L->top, luaH_new(L, 0, 0)); + sethvalue(L, L->top, luaH_new(L, narray, nrec)); api_incr_top(L); lua_unlock(L); } LUA_API int lua_getmetatable (lua_State *L, int objindex) { - const TObject *obj; + const TValue *obj; Table *mt = NULL; int res; lua_lock(L); - obj = luaA_indexAcceptable(L, objindex); - if (obj != NULL) { - switch (ttype(obj)) { - case LUA_TTABLE: - mt = hvalue(obj)->metatable; - break; - case LUA_TUSERDATA: - mt = uvalue(obj)->uv.metatable; - break; - } + obj = index2adr(L, objindex); + switch (ttype(obj)) { + case LUA_TTABLE: + mt = hvalue(obj)->metatable; + break; + case LUA_TUSERDATA: + mt = uvalue(obj)->metatable; + break; + default: + mt = G(L)->mt[ttype(obj)]; + break; } - if (mt == NULL || mt == hvalue(defaultmeta(L))) + if (mt == NULL) res = 0; else { - sethvalue(L->top, mt); + sethvalue(L, L->top, mt); api_incr_top(L); res = 1; } @@ -551,8 +612,22 @@ LUA_API int lua_getmetatable (lua_State *L, int objindex) { LUA_API void lua_getfenv (lua_State *L, int idx) { StkId o; lua_lock(L); - o = luaA_index(L, idx); - setobj2s(L->top, isLfunction(o) ? &clvalue(o)->l.g : gt(L)); + o = index2adr(L, idx); + api_checkvalidindex(L, o); + switch (ttype(o)) { + case LUA_TFUNCTION: + sethvalue(L, L->top, clvalue(o)->c.env); + break; + case LUA_TUSERDATA: + sethvalue(L, L->top, uvalue(o)->env); + break; + case LUA_TTHREAD: + setobj2s(L, L->top, gt(thvalue(o))); + break; + default: + setnilvalue(L->top); + break; + } api_incr_top(L); lua_unlock(L); } @@ -567,20 +642,36 @@ LUA_API void lua_settable (lua_State *L, int idx) { StkId t; lua_lock(L); api_checknelems(L, 2); - t = luaA_index(L, idx); + t = index2adr(L, idx); + api_checkvalidindex(L, t); luaV_settable(L, t, L->top - 2, L->top - 1); L->top -= 2; /* pop index and value */ lua_unlock(L); } +LUA_API void lua_setfield (lua_State *L, int idx, const char *k) { + StkId t; + TValue key; + lua_lock(L); + api_checknelems(L, 1); + t = index2adr(L, idx); + api_checkvalidindex(L, t); + setsvalue(L, &key, luaS_new(L, k)); + luaV_settable(L, t, &key, L->top - 1); + L->top--; /* pop value */ + lua_unlock(L); +} + + LUA_API void lua_rawset (lua_State *L, int idx) { StkId t; lua_lock(L); api_checknelems(L, 2); - t = luaA_index(L, idx); + t = index2adr(L, idx); api_check(L, ttistable(t)); - setobj2t(luaH_set(L, hvalue(t), L->top-2), L->top-1); /* write barrier */ + setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1); + luaC_barriert(L, hvalue(t), L->top-1); L->top -= 2; lua_unlock(L); } @@ -590,54 +681,76 @@ LUA_API void lua_rawseti (lua_State *L, int idx, int n) { StkId o; lua_lock(L); api_checknelems(L, 1); - o = luaA_index(L, idx); + o = index2adr(L, idx); api_check(L, ttistable(o)); - setobj2t(luaH_setnum(L, hvalue(o), n), L->top-1); /* write barrier */ + setobj2t(L, luaH_setnum(L, hvalue(o), n), L->top-1); + luaC_barriert(L, hvalue(o), L->top-1); L->top--; lua_unlock(L); } LUA_API int lua_setmetatable (lua_State *L, int objindex) { - TObject *obj, *mt; - int res = 1; + TValue *obj; + Table *mt; lua_lock(L); api_checknelems(L, 1); - obj = luaA_index(L, objindex); - mt = (!ttisnil(L->top - 1)) ? L->top - 1 : defaultmeta(L); - api_check(L, ttistable(mt)); + obj = index2adr(L, objindex); + api_checkvalidindex(L, obj); + if (ttisnil(L->top - 1)) + mt = NULL; + else { + api_check(L, ttistable(L->top - 1)); + mt = hvalue(L->top - 1); + } switch (ttype(obj)) { case LUA_TTABLE: { - hvalue(obj)->metatable = hvalue(mt); /* write barrier */ + hvalue(obj)->metatable = mt; + if (mt) + luaC_objbarriert(L, hvalue(obj), mt); break; } case LUA_TUSERDATA: { - uvalue(obj)->uv.metatable = hvalue(mt); /* write barrier */ + uvalue(obj)->metatable = mt; + if (mt) + luaC_objbarrier(L, rawuvalue(obj), mt); break; } default: { - res = 0; /* cannot set */ + G(L)->mt[ttype(obj)] = mt; break; } } L->top--; lua_unlock(L); - return res; + return 1; } LUA_API int lua_setfenv (lua_State *L, int idx) { StkId o; - int res = 0; + int res = 1; lua_lock(L); api_checknelems(L, 1); - o = luaA_index(L, idx); - L->top--; - api_check(L, ttistable(L->top)); - if (isLfunction(o)) { - res = 1; - clvalue(o)->l.g = *(L->top); + o = index2adr(L, idx); + api_checkvalidindex(L, o); + api_check(L, ttistable(L->top - 1)); + switch (ttype(o)) { + case LUA_TFUNCTION: + clvalue(o)->c.env = hvalue(L->top - 1); + break; + case LUA_TUSERDATA: + uvalue(o)->env = hvalue(L->top - 1); + break; + case LUA_TTHREAD: + sethvalue(L, gt(thvalue(o)), hvalue(L->top - 1)); + break; + default: + res = 0; + break; } + luaC_objbarrier(L, gcvalue(o), hvalue(L->top - 1)); + L->top--; lua_unlock(L); return res; } @@ -647,12 +760,23 @@ LUA_API int lua_setfenv (lua_State *L, int idx) { ** `load' and `call' functions (run Lua code) */ + +#define adjustresults(L,nres) \ + { if (nres == LUA_MULTRET && L->top >= L->ci->top) L->ci->top = L->top; } + + +#define checkresults(L,na,nr) \ + api_check(L, (nr) == LUA_MULTRET || (L->ci->top - L->top >= (nr) - (na))) + + LUA_API void lua_call (lua_State *L, int nargs, int nresults) { StkId func; lua_lock(L); api_checknelems(L, nargs+1); + checkresults(L, nargs, nresults); func = L->top - (nargs+1); luaD_call(L, func, nresults); + adjustresults(L, nresults); lua_unlock(L); } @@ -679,10 +803,19 @@ LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errfunc) { int status; ptrdiff_t func; lua_lock(L); - func = (errfunc == 0) ? 0 : savestack(L, luaA_index(L, errfunc)); + api_checknelems(L, nargs+1); + checkresults(L, nargs, nresults); + if (errfunc == 0) + func = 0; + else { + StkId o = index2adr(L, errfunc); + api_checkvalidindex(L, o); + func = savestack(L, o); + } c.func = L->top - (nargs+1); /* function to be called */ c.nresults = nresults; status = luaD_pcall(L, f_call, &c, savestack(L, c.func), func); + adjustresults(L, nresults); lua_unlock(L); return status; } @@ -700,12 +833,12 @@ struct CCallS { /* data to `f_Ccall' */ static void f_Ccall (lua_State *L, void *ud) { struct CCallS *c = cast(struct CCallS *, ud); Closure *cl; - cl = luaF_newCclosure(L, 0); + cl = luaF_newCclosure(L, 0, getcurrenv(L)); cl->c.f = c->func; - setclvalue(L->top, cl); /* push function */ - incr_top(L); + setclvalue(L, L->top, cl); /* push function */ + api_incr_top(L); setpvalue(L->top, c->ud); /* push only argument */ - incr_top(L); + api_incr_top(L); luaD_call(L, L->top - 2, 0); } @@ -722,72 +855,98 @@ LUA_API int lua_cpcall (lua_State *L, lua_CFunction func, void *ud) { } -LUA_API int lua_load (lua_State *L, lua_Chunkreader reader, void *data, +LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data, const char *chunkname) { ZIO z; int status; - int c; lua_lock(L); if (!chunkname) chunkname = "?"; - luaZ_init(&z, reader, data, chunkname); - c = luaZ_lookahead(&z); - status = luaD_protectedparser(L, &z, (c == LUA_SIGNATURE[0])); + luaZ_init(L, &z, reader, data); + status = luaD_protectedparser(L, &z, chunkname); lua_unlock(L); return status; } -LUA_API int lua_dump (lua_State *L, lua_Chunkwriter writer, void *data) { +LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data) { int status; - TObject *o; + TValue *o; lua_lock(L); api_checknelems(L, 1); o = L->top - 1; - if (isLfunction(o) && clvalue(o)->l.nupvalues == 0) { - luaU_dump(L, clvalue(o)->l.p, writer, data); - status = 1; - } + if (isLfunction(o)) + status = luaU_dump(L, clvalue(o)->l.p, writer, data, 0); else - status = 0; + status = 1; lua_unlock(L); return status; } -/* -** Garbage-collection functions -*/ +LUA_API int lua_status (lua_State *L) { + return L->status; +} -/* GC values are expressed in Kbytes: #bytes/2^10 */ -#define GCscalel(x) ((x)>>10) -#define GCscale(x) (cast(int, GCscalel(x))) -#define GCunscale(x) (cast(lu_mem, x)<<10) -LUA_API int lua_getgcthreshold (lua_State *L) { - int threshold; - lua_lock(L); - threshold = GCscale(G(L)->GCthreshold); - lua_unlock(L); - return threshold; -} +/* +** Garbage-collection function +*/ -LUA_API int lua_getgccount (lua_State *L) { - int count; +LUA_API int lua_gc (lua_State *L, int what, int data) { + int res = 0; + global_State *g; lua_lock(L); - count = GCscale(G(L)->nblocks); + g = G(L); + switch (what) { + case LUA_GCSTOP: { + g->GCthreshold = MAX_LUMEM; + break; + } + case LUA_GCRESTART: { + g->GCthreshold = g->totalbytes; + break; + } + case LUA_GCCOLLECT: { + luaC_fullgc(L); + break; + } + case LUA_GCCOUNT: { + /* GC values are expressed in Kbytes: #bytes/2^10 */ + res = cast_int(g->totalbytes >> 10); + break; + } + case LUA_GCCOUNTB: { + res = cast_int(g->totalbytes & 0x3ff); + break; + } + case LUA_GCSTEP: { + lu_mem a = (cast(lu_mem, data) << 10); + if (a <= g->totalbytes) + g->GCthreshold = g->totalbytes - a; + else + g->GCthreshold = 0; + while (g->GCthreshold <= g->totalbytes) + luaC_step(L); + if (g->gcstate == GCSpause) /* end of cycle? */ + res = 1; /* signal it */ + break; + } + case LUA_GCSETPAUSE: { + res = g->gcpause; + g->gcpause = data; + break; + } + case LUA_GCSETSTEPMUL: { + res = g->gcstepmul; + g->gcstepmul = data; + break; + } + default: res = -1; /* invalid option */ + } lua_unlock(L); - return count; + return res; } -LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) { - lua_lock(L); - if (cast(lu_mem, newthreshold) > GCscalel(MAX_LUMEM)) - G(L)->GCthreshold = MAX_LUMEM; - else - G(L)->GCthreshold = GCunscale(newthreshold); - luaC_checkGC(L); - lua_unlock(L); -} /* @@ -795,11 +954,6 @@ LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) { */ -LUA_API const char *lua_version (void) { - return LUA_VERSION; -} - - LUA_API int lua_error (lua_State *L) { lua_lock(L); api_checknelems(L, 1); @@ -813,7 +967,7 @@ LUA_API int lua_next (lua_State *L, int idx) { StkId t; int more; lua_lock(L); - t = luaA_index(L, idx); + t = index2adr(L, idx); api_check(L, ttistable(t)); more = luaH_next(L, hvalue(t), L->top - 1); if (more) { @@ -828,14 +982,14 @@ LUA_API int lua_next (lua_State *L, int idx) { LUA_API void lua_concat (lua_State *L, int n) { lua_lock(L); - luaC_checkGC(L); api_checknelems(L, n); if (n >= 2) { - luaV_concat(L, n, L->top - L->base - 1); + luaC_checkGC(L); + luaV_concat(L, n, cast_int(L->top - L->base) - 1); L->top -= (n-1); } else if (n == 0) { /* push empty string */ - setsvalue2s(L->top, luaS_newlstr(L, NULL, 0)); + setsvalue2s(L, L->top, luaS_newlstr(L, "", 0)); api_incr_top(L); } /* else n == 1; nothing to do */ @@ -843,39 +997,40 @@ LUA_API void lua_concat (lua_State *L, int n) { } +LUA_API lua_Alloc lua_getallocf (lua_State *L, void **ud) { + lua_Alloc f; + lua_lock(L); + if (ud) *ud = G(L)->ud; + f = G(L)->frealloc; + lua_unlock(L); + return f; +} + + +LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud) { + lua_lock(L); + G(L)->ud = ud; + G(L)->frealloc = f; + lua_unlock(L); +} + + LUA_API void *lua_newuserdata (lua_State *L, size_t size) { Udata *u; lua_lock(L); luaC_checkGC(L); - u = luaS_newudata(L, size); - setuvalue(L->top, u); + u = luaS_newudata(L, size, getcurrenv(L)); + setuvalue(L, L->top, u); api_incr_top(L); lua_unlock(L); return u + 1; } -LUA_API int lua_pushupvalues (lua_State *L) { - Closure *func; - int n, i; - lua_lock(L); - api_check(L, iscfunction(L->base - 1)); - func = clvalue(L->base - 1); - n = func->c.nupvalues; - luaD_checkstack(L, n + LUA_MINSTACK); - for (i=0; i<n; i++) { - setobj2s(L->top, &func->c.upvalue[i]); - L->top++; - } - lua_unlock(L); - return n; -} -static const char *aux_upvalue (lua_State *L, int funcindex, int n, - TObject **val) { +static const char *aux_upvalue (StkId fi, int n, TValue **val) { Closure *f; - StkId fi = luaA_index(L, funcindex); if (!ttisfunction(fi)) return NULL; f = clvalue(fi); if (f->c.isC) { @@ -894,11 +1049,11 @@ static const char *aux_upvalue (lua_State *L, int funcindex, int n, LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) { const char *name; - TObject *val; + TValue *val; lua_lock(L); - name = aux_upvalue(L, funcindex, n, &val); + name = aux_upvalue(index2adr(L, funcindex), n, &val); if (name) { - setobj2s(L->top, val); + setobj2s(L, L->top, val); api_incr_top(L); } lua_unlock(L); @@ -908,13 +1063,16 @@ LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) { LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) { const char *name; - TObject *val; + TValue *val; + StkId fi; lua_lock(L); + fi = index2adr(L, funcindex); api_checknelems(L, 1); - name = aux_upvalue(L, funcindex, n, &val); + name = aux_upvalue(fi, n, &val); if (name) { L->top--; - setobj(val, L->top); /* write barrier */ + setobj(L, val, L->top); + luaC_barrier(L, clvalue(fi), L->top); } lua_unlock(L); return name; |