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Diffstat (limited to 'Build/source/libs/luajit/LuaJIT-src/src/lj_api.c')
-rw-r--r--Build/source/libs/luajit/LuaJIT-src/src/lj_api.c1210
1 files changed, 1210 insertions, 0 deletions
diff --git a/Build/source/libs/luajit/LuaJIT-src/src/lj_api.c b/Build/source/libs/luajit/LuaJIT-src/src/lj_api.c
new file mode 100644
index 00000000000..1f09284f991
--- /dev/null
+++ b/Build/source/libs/luajit/LuaJIT-src/src/lj_api.c
@@ -0,0 +1,1210 @@
+/*
+** Public Lua/C API.
+** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
+**
+** Major portions taken verbatim or adapted from the Lua interpreter.
+** Copyright (C) 1994-2008 Lua.org, PUC-Rio. See Copyright Notice in lua.h
+*/
+
+#define lj_api_c
+#define LUA_CORE
+
+#include "lj_obj.h"
+#include "lj_gc.h"
+#include "lj_err.h"
+#include "lj_debug.h"
+#include "lj_str.h"
+#include "lj_tab.h"
+#include "lj_func.h"
+#include "lj_udata.h"
+#include "lj_meta.h"
+#include "lj_state.h"
+#include "lj_bc.h"
+#include "lj_frame.h"
+#include "lj_trace.h"
+#include "lj_vm.h"
+#include "lj_strscan.h"
+#include "lj_strfmt.h"
+
+/* -- Common helper functions --------------------------------------------- */
+
+#define api_checknelems(L, n) api_check(L, (n) <= (L->top - L->base))
+#define api_checkvalidindex(L, i) api_check(L, (i) != niltv(L))
+
+static TValue *index2adr(lua_State *L, int idx)
+{
+ if (idx > 0) {
+ TValue *o = L->base + (idx - 1);
+ return o < L->top ? o : niltv(L);
+ } else if (idx > LUA_REGISTRYINDEX) {
+ api_check(L, idx != 0 && -idx <= L->top - L->base);
+ return L->top + idx;
+ } else if (idx == LUA_GLOBALSINDEX) {
+ TValue *o = &G(L)->tmptv;
+ settabV(L, o, tabref(L->env));
+ return o;
+ } else if (idx == LUA_REGISTRYINDEX) {
+ return registry(L);
+ } else {
+ GCfunc *fn = curr_func(L);
+ api_check(L, fn->c.gct == ~LJ_TFUNC && !isluafunc(fn));
+ if (idx == LUA_ENVIRONINDEX) {
+ TValue *o = &G(L)->tmptv;
+ settabV(L, o, tabref(fn->c.env));
+ return o;
+ } else {
+ idx = LUA_GLOBALSINDEX - idx;
+ return idx <= fn->c.nupvalues ? &fn->c.upvalue[idx-1] : niltv(L);
+ }
+ }
+}
+
+static TValue *stkindex2adr(lua_State *L, int idx)
+{
+ if (idx > 0) {
+ TValue *o = L->base + (idx - 1);
+ return o < L->top ? o : niltv(L);
+ } else {
+ api_check(L, idx != 0 && -idx <= L->top - L->base);
+ return L->top + idx;
+ }
+}
+
+static GCtab *getcurrenv(lua_State *L)
+{
+ GCfunc *fn = curr_func(L);
+ return fn->c.gct == ~LJ_TFUNC ? tabref(fn->c.env) : tabref(L->env);
+}
+
+/* -- Miscellaneous API functions ----------------------------------------- */
+
+LUA_API int lua_status(lua_State *L)
+{
+ return L->status;
+}
+
+LUA_API int lua_checkstack(lua_State *L, int size)
+{
+ if (size > LUAI_MAXCSTACK || (L->top - L->base + size) > LUAI_MAXCSTACK) {
+ return 0; /* Stack overflow. */
+ } else if (size > 0) {
+ lj_state_checkstack(L, (MSize)size);
+ }
+ return 1;
+}
+
+LUALIB_API void luaL_checkstack(lua_State *L, int size, const char *msg)
+{
+ if (!lua_checkstack(L, size))
+ lj_err_callerv(L, LJ_ERR_STKOVM, msg);
+}
+
+LUA_API void lua_xmove(lua_State *from, lua_State *to, int n)
+{
+ TValue *f, *t;
+ if (from == to) return;
+ api_checknelems(from, n);
+ api_check(from, G(from) == G(to));
+ lj_state_checkstack(to, (MSize)n);
+ f = from->top;
+ t = to->top = to->top + n;
+ while (--n >= 0) copyTV(to, --t, --f);
+ from->top = f;
+}
+
+/* -- Stack manipulation -------------------------------------------------- */
+
+LUA_API int lua_gettop(lua_State *L)
+{
+ return (int)(L->top - L->base);
+}
+
+LUA_API void lua_settop(lua_State *L, int idx)
+{
+ if (idx >= 0) {
+ api_check(L, idx <= tvref(L->maxstack) - L->base);
+ if (L->base + idx > L->top) {
+ if (L->base + idx >= tvref(L->maxstack))
+ lj_state_growstack(L, (MSize)idx - (MSize)(L->top - L->base));
+ do { setnilV(L->top++); } while (L->top < L->base + idx);
+ } else {
+ L->top = L->base + idx;
+ }
+ } else {
+ api_check(L, -(idx+1) <= (L->top - L->base));
+ L->top += idx+1; /* Shrinks top (idx < 0). */
+ }
+}
+
+LUA_API void lua_remove(lua_State *L, int idx)
+{
+ TValue *p = stkindex2adr(L, idx);
+ api_checkvalidindex(L, p);
+ while (++p < L->top) copyTV(L, p-1, p);
+ L->top--;
+}
+
+LUA_API void lua_insert(lua_State *L, int idx)
+{
+ TValue *q, *p = stkindex2adr(L, idx);
+ api_checkvalidindex(L, p);
+ for (q = L->top; q > p; q--) copyTV(L, q, q-1);
+ copyTV(L, p, L->top);
+}
+
+LUA_API void lua_replace(lua_State *L, int idx)
+{
+ api_checknelems(L, 1);
+ if (idx == LUA_GLOBALSINDEX) {
+ api_check(L, tvistab(L->top-1));
+ /* NOBARRIER: A thread (i.e. L) is never black. */
+ setgcref(L->env, obj2gco(tabV(L->top-1)));
+ } else if (idx == LUA_ENVIRONINDEX) {
+ GCfunc *fn = curr_func(L);
+ if (fn->c.gct != ~LJ_TFUNC)
+ lj_err_msg(L, LJ_ERR_NOENV);
+ api_check(L, tvistab(L->top-1));
+ setgcref(fn->c.env, obj2gco(tabV(L->top-1)));
+ lj_gc_barrier(L, fn, L->top-1);
+ } else {
+ TValue *o = index2adr(L, idx);
+ api_checkvalidindex(L, o);
+ copyTV(L, o, L->top-1);
+ if (idx < LUA_GLOBALSINDEX) /* Need a barrier for upvalues. */
+ lj_gc_barrier(L, curr_func(L), L->top-1);
+ }
+ L->top--;
+}
+
+LUA_API void lua_pushvalue(lua_State *L, int idx)
+{
+ copyTV(L, L->top, index2adr(L, idx));
+ incr_top(L);
+}
+
+/* -- Stack getters ------------------------------------------------------- */
+
+LUA_API int lua_type(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ if (tvisnumber(o)) {
+ return LUA_TNUMBER;
+#if LJ_64 && !LJ_GC64
+ } else if (tvislightud(o)) {
+ return LUA_TLIGHTUSERDATA;
+#endif
+ } else if (o == niltv(L)) {
+ return LUA_TNONE;
+ } else { /* Magic internal/external tag conversion. ORDER LJ_T */
+ uint32_t t = ~itype(o);
+#if LJ_64
+ int tt = (int)((U64x(75a06,98042110) >> 4*t) & 15u);
+#else
+ int tt = (int)(((t < 8 ? 0x98042110u : 0x75a06u) >> 4*(t&7)) & 15u);
+#endif
+ lua_assert(tt != LUA_TNIL || tvisnil(o));
+ return tt;
+ }
+}
+
+LUALIB_API void luaL_checktype(lua_State *L, int idx, int tt)
+{
+ if (lua_type(L, idx) != tt)
+ lj_err_argt(L, idx, tt);
+}
+
+LUALIB_API void luaL_checkany(lua_State *L, int idx)
+{
+ if (index2adr(L, idx) == niltv(L))
+ lj_err_arg(L, idx, LJ_ERR_NOVAL);
+}
+
+LUA_API const char *lua_typename(lua_State *L, int t)
+{
+ UNUSED(L);
+ return lj_obj_typename[t+1];
+}
+
+LUA_API int lua_iscfunction(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ return tvisfunc(o) && !isluafunc(funcV(o));
+}
+
+LUA_API int lua_isnumber(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ return (tvisnumber(o) || (tvisstr(o) && lj_strscan_number(strV(o), &tmp)));
+}
+
+LUA_API int lua_isstring(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ return (tvisstr(o) || tvisnumber(o));
+}
+
+LUA_API int lua_isuserdata(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ return (tvisudata(o) || tvislightud(o));
+}
+
+LUA_API int lua_rawequal(lua_State *L, int idx1, int idx2)
+{
+ cTValue *o1 = index2adr(L, idx1);
+ cTValue *o2 = index2adr(L, idx2);
+ return (o1 == niltv(L) || o2 == niltv(L)) ? 0 : lj_obj_equal(o1, o2);
+}
+
+LUA_API int lua_equal(lua_State *L, int idx1, int idx2)
+{
+ cTValue *o1 = index2adr(L, idx1);
+ cTValue *o2 = index2adr(L, idx2);
+ if (tvisint(o1) && tvisint(o2)) {
+ return intV(o1) == intV(o2);
+ } else if (tvisnumber(o1) && tvisnumber(o2)) {
+ return numberVnum(o1) == numberVnum(o2);
+ } else if (itype(o1) != itype(o2)) {
+ return 0;
+ } else if (tvispri(o1)) {
+ return o1 != niltv(L) && o2 != niltv(L);
+#if LJ_64 && !LJ_GC64
+ } else if (tvislightud(o1)) {
+ return o1->u64 == o2->u64;
+#endif
+ } else if (gcrefeq(o1->gcr, o2->gcr)) {
+ return 1;
+ } else if (!tvistabud(o1)) {
+ return 0;
+ } else {
+ TValue *base = lj_meta_equal(L, gcV(o1), gcV(o2), 0);
+ if ((uintptr_t)base <= 1) {
+ return (int)(uintptr_t)base;
+ } else {
+ L->top = base+2;
+ lj_vm_call(L, base, 1+1);
+ L->top -= 2+LJ_FR2;
+ return tvistruecond(L->top+1+LJ_FR2);
+ }
+ }
+}
+
+LUA_API int lua_lessthan(lua_State *L, int idx1, int idx2)
+{
+ cTValue *o1 = index2adr(L, idx1);
+ cTValue *o2 = index2adr(L, idx2);
+ if (o1 == niltv(L) || o2 == niltv(L)) {
+ return 0;
+ } else if (tvisint(o1) && tvisint(o2)) {
+ return intV(o1) < intV(o2);
+ } else if (tvisnumber(o1) && tvisnumber(o2)) {
+ return numberVnum(o1) < numberVnum(o2);
+ } else {
+ TValue *base = lj_meta_comp(L, o1, o2, 0);
+ if ((uintptr_t)base <= 1) {
+ return (int)(uintptr_t)base;
+ } else {
+ L->top = base+2;
+ lj_vm_call(L, base, 1+1);
+ L->top -= 2+LJ_FR2;
+ return tvistruecond(L->top+1+LJ_FR2);
+ }
+ }
+}
+
+LUA_API lua_Number lua_tonumber(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ if (LJ_LIKELY(tvisnumber(o)))
+ return numberVnum(o);
+ else if (tvisstr(o) && lj_strscan_num(strV(o), &tmp))
+ return numV(&tmp);
+ else
+ return 0;
+}
+
+LUALIB_API lua_Number luaL_checknumber(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ if (LJ_LIKELY(tvisnumber(o)))
+ return numberVnum(o);
+ else if (!(tvisstr(o) && lj_strscan_num(strV(o), &tmp)))
+ lj_err_argt(L, idx, LUA_TNUMBER);
+ return numV(&tmp);
+}
+
+LUALIB_API lua_Number luaL_optnumber(lua_State *L, int idx, lua_Number def)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ if (LJ_LIKELY(tvisnumber(o)))
+ return numberVnum(o);
+ else if (tvisnil(o))
+ return def;
+ else if (!(tvisstr(o) && lj_strscan_num(strV(o), &tmp)))
+ lj_err_argt(L, idx, LUA_TNUMBER);
+ return numV(&tmp);
+}
+
+LUA_API lua_Integer lua_tointeger(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ lua_Number n;
+ if (LJ_LIKELY(tvisint(o))) {
+ return intV(o);
+ } else if (LJ_LIKELY(tvisnum(o))) {
+ n = numV(o);
+ } else {
+ if (!(tvisstr(o) && lj_strscan_number(strV(o), &tmp)))
+ return 0;
+ if (tvisint(&tmp))
+ return (lua_Integer)intV(&tmp);
+ n = numV(&tmp);
+ }
+#if LJ_64
+ return (lua_Integer)n;
+#else
+ return lj_num2int(n);
+#endif
+}
+
+LUALIB_API lua_Integer luaL_checkinteger(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ lua_Number n;
+ if (LJ_LIKELY(tvisint(o))) {
+ return intV(o);
+ } else if (LJ_LIKELY(tvisnum(o))) {
+ n = numV(o);
+ } else {
+ if (!(tvisstr(o) && lj_strscan_number(strV(o), &tmp)))
+ lj_err_argt(L, idx, LUA_TNUMBER);
+ if (tvisint(&tmp))
+ return (lua_Integer)intV(&tmp);
+ n = numV(&tmp);
+ }
+#if LJ_64
+ return (lua_Integer)n;
+#else
+ return lj_num2int(n);
+#endif
+}
+
+LUALIB_API lua_Integer luaL_optinteger(lua_State *L, int idx, lua_Integer def)
+{
+ cTValue *o = index2adr(L, idx);
+ TValue tmp;
+ lua_Number n;
+ if (LJ_LIKELY(tvisint(o))) {
+ return intV(o);
+ } else if (LJ_LIKELY(tvisnum(o))) {
+ n = numV(o);
+ } else if (tvisnil(o)) {
+ return def;
+ } else {
+ if (!(tvisstr(o) && lj_strscan_number(strV(o), &tmp)))
+ lj_err_argt(L, idx, LUA_TNUMBER);
+ if (tvisint(&tmp))
+ return (lua_Integer)intV(&tmp);
+ n = numV(&tmp);
+ }
+#if LJ_64
+ return (lua_Integer)n;
+#else
+ return lj_num2int(n);
+#endif
+}
+
+LUA_API int lua_toboolean(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ return tvistruecond(o);
+}
+
+LUA_API const char *lua_tolstring(lua_State *L, int idx, size_t *len)
+{
+ TValue *o = index2adr(L, idx);
+ GCstr *s;
+ if (LJ_LIKELY(tvisstr(o))) {
+ s = strV(o);
+ } else if (tvisnumber(o)) {
+ lj_gc_check(L);
+ o = index2adr(L, idx); /* GC may move the stack. */
+ s = lj_strfmt_number(L, o);
+ setstrV(L, o, s);
+ } else {
+ if (len != NULL) *len = 0;
+ return NULL;
+ }
+ if (len != NULL) *len = s->len;
+ return strdata(s);
+}
+
+LUALIB_API const char *luaL_checklstring(lua_State *L, int idx, size_t *len)
+{
+ TValue *o = index2adr(L, idx);
+ GCstr *s;
+ if (LJ_LIKELY(tvisstr(o))) {
+ s = strV(o);
+ } else if (tvisnumber(o)) {
+ lj_gc_check(L);
+ o = index2adr(L, idx); /* GC may move the stack. */
+ s = lj_strfmt_number(L, o);
+ setstrV(L, o, s);
+ } else {
+ lj_err_argt(L, idx, LUA_TSTRING);
+ }
+ if (len != NULL) *len = s->len;
+ return strdata(s);
+}
+
+LUALIB_API const char *luaL_optlstring(lua_State *L, int idx,
+ const char *def, size_t *len)
+{
+ TValue *o = index2adr(L, idx);
+ GCstr *s;
+ if (LJ_LIKELY(tvisstr(o))) {
+ s = strV(o);
+ } else if (tvisnil(o)) {
+ if (len != NULL) *len = def ? strlen(def) : 0;
+ return def;
+ } else if (tvisnumber(o)) {
+ lj_gc_check(L);
+ o = index2adr(L, idx); /* GC may move the stack. */
+ s = lj_strfmt_number(L, o);
+ setstrV(L, o, s);
+ } else {
+ lj_err_argt(L, idx, LUA_TSTRING);
+ }
+ if (len != NULL) *len = s->len;
+ return strdata(s);
+}
+
+LUALIB_API int luaL_checkoption(lua_State *L, int idx, const char *def,
+ const char *const lst[])
+{
+ ptrdiff_t i;
+ const char *s = lua_tolstring(L, idx, NULL);
+ if (s == NULL && (s = def) == NULL)
+ lj_err_argt(L, idx, LUA_TSTRING);
+ for (i = 0; lst[i]; i++)
+ if (strcmp(lst[i], s) == 0)
+ return (int)i;
+ lj_err_argv(L, idx, LJ_ERR_INVOPTM, s);
+}
+
+LUA_API size_t lua_objlen(lua_State *L, int idx)
+{
+ TValue *o = index2adr(L, idx);
+ if (tvisstr(o)) {
+ return strV(o)->len;
+ } else if (tvistab(o)) {
+ return (size_t)lj_tab_len(tabV(o));
+ } else if (tvisudata(o)) {
+ return udataV(o)->len;
+ } else if (tvisnumber(o)) {
+ GCstr *s = lj_strfmt_number(L, o);
+ setstrV(L, o, s);
+ return s->len;
+ } else {
+ return 0;
+ }
+}
+
+LUA_API lua_CFunction lua_tocfunction(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ if (tvisfunc(o)) {
+ BCOp op = bc_op(*mref(funcV(o)->c.pc, BCIns));
+ if (op == BC_FUNCC || op == BC_FUNCCW)
+ return funcV(o)->c.f;
+ }
+ return NULL;
+}
+
+LUA_API void *lua_touserdata(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ if (tvisudata(o))
+ return uddata(udataV(o));
+ else if (tvislightud(o))
+ return lightudV(o);
+ else
+ return NULL;
+}
+
+LUA_API lua_State *lua_tothread(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ return (!tvisthread(o)) ? NULL : threadV(o);
+}
+
+LUA_API const void *lua_topointer(lua_State *L, int idx)
+{
+ return lj_obj_ptr(index2adr(L, idx));
+}
+
+/* -- Stack setters (object creation) ------------------------------------- */
+
+LUA_API void lua_pushnil(lua_State *L)
+{
+ setnilV(L->top);
+ incr_top(L);
+}
+
+LUA_API void lua_pushnumber(lua_State *L, lua_Number n)
+{
+ setnumV(L->top, n);
+ if (LJ_UNLIKELY(tvisnan(L->top)))
+ setnanV(L->top); /* Canonicalize injected NaNs. */
+ incr_top(L);
+}
+
+LUA_API void lua_pushinteger(lua_State *L, lua_Integer n)
+{
+ setintptrV(L->top, n);
+ incr_top(L);
+}
+
+LUA_API void lua_pushlstring(lua_State *L, const char *str, size_t len)
+{
+ GCstr *s;
+ lj_gc_check(L);
+ s = lj_str_new(L, str, len);
+ setstrV(L, L->top, s);
+ incr_top(L);
+}
+
+LUA_API void lua_pushstring(lua_State *L, const char *str)
+{
+ if (str == NULL) {
+ setnilV(L->top);
+ } else {
+ GCstr *s;
+ lj_gc_check(L);
+ s = lj_str_newz(L, str);
+ setstrV(L, L->top, s);
+ }
+ incr_top(L);
+}
+
+LUA_API const char *lua_pushvfstring(lua_State *L, const char *fmt,
+ va_list argp)
+{
+ lj_gc_check(L);
+ return lj_strfmt_pushvf(L, fmt, argp);
+}
+
+LUA_API const char *lua_pushfstring(lua_State *L, const char *fmt, ...)
+{
+ const char *ret;
+ va_list argp;
+ lj_gc_check(L);
+ va_start(argp, fmt);
+ ret = lj_strfmt_pushvf(L, fmt, argp);
+ va_end(argp);
+ return ret;
+}
+
+LUA_API void lua_pushcclosure(lua_State *L, lua_CFunction f, int n)
+{
+ GCfunc *fn;
+ lj_gc_check(L);
+ api_checknelems(L, n);
+ fn = lj_func_newC(L, (MSize)n, getcurrenv(L));
+ fn->c.f = f;
+ L->top -= n;
+ while (n--)
+ copyTV(L, &fn->c.upvalue[n], L->top+n);
+ setfuncV(L, L->top, fn);
+ lua_assert(iswhite(obj2gco(fn)));
+ incr_top(L);
+}
+
+LUA_API void lua_pushboolean(lua_State *L, int b)
+{
+ setboolV(L->top, (b != 0));
+ incr_top(L);
+}
+
+LUA_API void lua_pushlightuserdata(lua_State *L, void *p)
+{
+ setlightudV(L->top, checklightudptr(L, p));
+ incr_top(L);
+}
+
+LUA_API void lua_createtable(lua_State *L, int narray, int nrec)
+{
+ lj_gc_check(L);
+ settabV(L, L->top, lj_tab_new_ah(L, narray, nrec));
+ incr_top(L);
+}
+
+LUALIB_API int luaL_newmetatable(lua_State *L, const char *tname)
+{
+ GCtab *regt = tabV(registry(L));
+ TValue *tv = lj_tab_setstr(L, regt, lj_str_newz(L, tname));
+ if (tvisnil(tv)) {
+ GCtab *mt = lj_tab_new(L, 0, 1);
+ settabV(L, tv, mt);
+ settabV(L, L->top++, mt);
+ lj_gc_anybarriert(L, regt);
+ return 1;
+ } else {
+ copyTV(L, L->top++, tv);
+ return 0;
+ }
+}
+
+LUA_API int lua_pushthread(lua_State *L)
+{
+ setthreadV(L, L->top, L);
+ incr_top(L);
+ return (mainthread(G(L)) == L);
+}
+
+LUA_API lua_State *lua_newthread(lua_State *L)
+{
+ lua_State *L1;
+ lj_gc_check(L);
+ L1 = lj_state_new(L);
+ setthreadV(L, L->top, L1);
+ incr_top(L);
+ return L1;
+}
+
+LUA_API void *lua_newuserdata(lua_State *L, size_t size)
+{
+ GCudata *ud;
+ lj_gc_check(L);
+ if (size > LJ_MAX_UDATA)
+ lj_err_msg(L, LJ_ERR_UDATAOV);
+ ud = lj_udata_new(L, (MSize)size, getcurrenv(L));
+ setudataV(L, L->top, ud);
+ incr_top(L);
+ return uddata(ud);
+}
+
+LUA_API void lua_concat(lua_State *L, int n)
+{
+ api_checknelems(L, n);
+ if (n >= 2) {
+ n--;
+ do {
+ TValue *top = lj_meta_cat(L, L->top-1, -n);
+ if (top == NULL) {
+ L->top -= n;
+ break;
+ }
+ n -= (int)(L->top - top);
+ L->top = top+2;
+ lj_vm_call(L, top, 1+1);
+ L->top -= 1+LJ_FR2;
+ copyTV(L, L->top-1, L->top+LJ_FR2);
+ } while (--n > 0);
+ } else if (n == 0) { /* Push empty string. */
+ setstrV(L, L->top, &G(L)->strempty);
+ incr_top(L);
+ }
+ /* else n == 1: nothing to do. */
+}
+
+/* -- Object getters ------------------------------------------------------ */
+
+LUA_API void lua_gettable(lua_State *L, int idx)
+{
+ cTValue *v, *t = index2adr(L, idx);
+ api_checkvalidindex(L, t);
+ v = lj_meta_tget(L, t, L->top-1);
+ if (v == NULL) {
+ L->top += 2;
+ lj_vm_call(L, L->top-2, 1+1);
+ L->top -= 2+LJ_FR2;
+ v = L->top+1+LJ_FR2;
+ }
+ copyTV(L, L->top-1, v);
+}
+
+LUA_API void lua_getfield(lua_State *L, int idx, const char *k)
+{
+ cTValue *v, *t = index2adr(L, idx);
+ TValue key;
+ api_checkvalidindex(L, t);
+ setstrV(L, &key, lj_str_newz(L, k));
+ v = lj_meta_tget(L, t, &key);
+ if (v == NULL) {
+ L->top += 2;
+ lj_vm_call(L, L->top-2, 1+1);
+ L->top -= 2+LJ_FR2;
+ v = L->top+1+LJ_FR2;
+ }
+ copyTV(L, L->top, v);
+ incr_top(L);
+}
+
+LUA_API void lua_rawget(lua_State *L, int idx)
+{
+ cTValue *t = index2adr(L, idx);
+ api_check(L, tvistab(t));
+ copyTV(L, L->top-1, lj_tab_get(L, tabV(t), L->top-1));
+}
+
+LUA_API void lua_rawgeti(lua_State *L, int idx, int n)
+{
+ cTValue *v, *t = index2adr(L, idx);
+ api_check(L, tvistab(t));
+ v = lj_tab_getint(tabV(t), n);
+ if (v) {
+ copyTV(L, L->top, v);
+ } else {
+ setnilV(L->top);
+ }
+ incr_top(L);
+}
+
+LUA_API int lua_getmetatable(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ GCtab *mt = NULL;
+ if (tvistab(o))
+ mt = tabref(tabV(o)->metatable);
+ else if (tvisudata(o))
+ mt = tabref(udataV(o)->metatable);
+ else
+ mt = tabref(basemt_obj(G(L), o));
+ if (mt == NULL)
+ return 0;
+ settabV(L, L->top, mt);
+ incr_top(L);
+ return 1;
+}
+
+LUALIB_API int luaL_getmetafield(lua_State *L, int idx, const char *field)
+{
+ if (lua_getmetatable(L, idx)) {
+ cTValue *tv = lj_tab_getstr(tabV(L->top-1), lj_str_newz(L, field));
+ if (tv && !tvisnil(tv)) {
+ copyTV(L, L->top-1, tv);
+ return 1;
+ }
+ L->top--;
+ }
+ return 0;
+}
+
+LUA_API void lua_getfenv(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ api_checkvalidindex(L, o);
+ if (tvisfunc(o)) {
+ settabV(L, L->top, tabref(funcV(o)->c.env));
+ } else if (tvisudata(o)) {
+ settabV(L, L->top, tabref(udataV(o)->env));
+ } else if (tvisthread(o)) {
+ settabV(L, L->top, tabref(threadV(o)->env));
+ } else {
+ setnilV(L->top);
+ }
+ incr_top(L);
+}
+
+LUA_API int lua_next(lua_State *L, int idx)
+{
+ cTValue *t = index2adr(L, idx);
+ int more;
+ api_check(L, tvistab(t));
+ more = lj_tab_next(L, tabV(t), L->top-1);
+ if (more) {
+ incr_top(L); /* Return new key and value slot. */
+ } else { /* End of traversal. */
+ L->top--; /* Remove key slot. */
+ }
+ return more;
+}
+
+LUA_API const char *lua_getupvalue(lua_State *L, int idx, int n)
+{
+ TValue *val;
+ const char *name = lj_debug_uvnamev(index2adr(L, idx), (uint32_t)(n-1), &val);
+ if (name) {
+ copyTV(L, L->top, val);
+ incr_top(L);
+ }
+ return name;
+}
+
+LUA_API void *lua_upvalueid(lua_State *L, int idx, int n)
+{
+ GCfunc *fn = funcV(index2adr(L, idx));
+ n--;
+ api_check(L, (uint32_t)n < fn->l.nupvalues);
+ return isluafunc(fn) ? (void *)gcref(fn->l.uvptr[n]) :
+ (void *)&fn->c.upvalue[n];
+}
+
+LUA_API void lua_upvaluejoin(lua_State *L, int idx1, int n1, int idx2, int n2)
+{
+ GCfunc *fn1 = funcV(index2adr(L, idx1));
+ GCfunc *fn2 = funcV(index2adr(L, idx2));
+ n1--; n2--;
+ api_check(L, isluafunc(fn1) && (uint32_t)n1 < fn1->l.nupvalues);
+ api_check(L, isluafunc(fn2) && (uint32_t)n2 < fn2->l.nupvalues);
+ setgcrefr(fn1->l.uvptr[n1], fn2->l.uvptr[n2]);
+ lj_gc_objbarrier(L, fn1, gcref(fn1->l.uvptr[n1]));
+}
+
+LUALIB_API void *luaL_checkudata(lua_State *L, int idx, const char *tname)
+{
+ cTValue *o = index2adr(L, idx);
+ if (tvisudata(o)) {
+ GCudata *ud = udataV(o);
+ cTValue *tv = lj_tab_getstr(tabV(registry(L)), lj_str_newz(L, tname));
+ if (tv && tvistab(tv) && tabV(tv) == tabref(ud->metatable))
+ return uddata(ud);
+ }
+ lj_err_argtype(L, idx, tname);
+ return NULL; /* unreachable */
+}
+
+/* -- Object setters ------------------------------------------------------ */
+
+LUA_API void lua_settable(lua_State *L, int idx)
+{
+ TValue *o;
+ cTValue *t = index2adr(L, idx);
+ api_checknelems(L, 2);
+ api_checkvalidindex(L, t);
+ o = lj_meta_tset(L, t, L->top-2);
+ if (o) {
+ /* NOBARRIER: lj_meta_tset ensures the table is not black. */
+ L->top -= 2;
+ copyTV(L, o, L->top+1);
+ } else {
+ TValue *base = L->top;
+ copyTV(L, base+2, base-3-2*LJ_FR2);
+ L->top = base+3;
+ lj_vm_call(L, base, 0+1);
+ L->top -= 3+LJ_FR2;
+ }
+}
+
+LUA_API void lua_setfield(lua_State *L, int idx, const char *k)
+{
+ TValue *o;
+ TValue key;
+ cTValue *t = index2adr(L, idx);
+ api_checknelems(L, 1);
+ api_checkvalidindex(L, t);
+ setstrV(L, &key, lj_str_newz(L, k));
+ o = lj_meta_tset(L, t, &key);
+ if (o) {
+ /* NOBARRIER: lj_meta_tset ensures the table is not black. */
+ copyTV(L, o, --L->top);
+ } else {
+ TValue *base = L->top;
+ copyTV(L, base+2, base-3-2*LJ_FR2);
+ L->top = base+3;
+ lj_vm_call(L, base, 0+1);
+ L->top -= 2+LJ_FR2;
+ }
+}
+
+LUA_API void lua_rawset(lua_State *L, int idx)
+{
+ GCtab *t = tabV(index2adr(L, idx));
+ TValue *dst, *key;
+ api_checknelems(L, 2);
+ key = L->top-2;
+ dst = lj_tab_set(L, t, key);
+ copyTV(L, dst, key+1);
+ lj_gc_anybarriert(L, t);
+ L->top = key;
+}
+
+LUA_API void lua_rawseti(lua_State *L, int idx, int n)
+{
+ GCtab *t = tabV(index2adr(L, idx));
+ TValue *dst, *src;
+ api_checknelems(L, 1);
+ dst = lj_tab_setint(L, t, n);
+ src = L->top-1;
+ copyTV(L, dst, src);
+ lj_gc_barriert(L, t, dst);
+ L->top = src;
+}
+
+LUA_API int lua_setmetatable(lua_State *L, int idx)
+{
+ global_State *g;
+ GCtab *mt;
+ cTValue *o = index2adr(L, idx);
+ api_checknelems(L, 1);
+ api_checkvalidindex(L, o);
+ if (tvisnil(L->top-1)) {
+ mt = NULL;
+ } else {
+ api_check(L, tvistab(L->top-1));
+ mt = tabV(L->top-1);
+ }
+ g = G(L);
+ if (tvistab(o)) {
+ setgcref(tabV(o)->metatable, obj2gco(mt));
+ if (mt)
+ lj_gc_objbarriert(L, tabV(o), mt);
+ } else if (tvisudata(o)) {
+ setgcref(udataV(o)->metatable, obj2gco(mt));
+ if (mt)
+ lj_gc_objbarrier(L, udataV(o), mt);
+ } else {
+ /* Flush cache, since traces specialize to basemt. But not during __gc. */
+ if (lj_trace_flushall(L))
+ lj_err_caller(L, LJ_ERR_NOGCMM);
+ if (tvisbool(o)) {
+ /* NOBARRIER: basemt is a GC root. */
+ setgcref(basemt_it(g, LJ_TTRUE), obj2gco(mt));
+ setgcref(basemt_it(g, LJ_TFALSE), obj2gco(mt));
+ } else {
+ /* NOBARRIER: basemt is a GC root. */
+ setgcref(basemt_obj(g, o), obj2gco(mt));
+ }
+ }
+ L->top--;
+ return 1;
+}
+
+LUA_API int lua_setfenv(lua_State *L, int idx)
+{
+ cTValue *o = index2adr(L, idx);
+ GCtab *t;
+ api_checknelems(L, 1);
+ api_checkvalidindex(L, o);
+ api_check(L, tvistab(L->top-1));
+ t = tabV(L->top-1);
+ if (tvisfunc(o)) {
+ setgcref(funcV(o)->c.env, obj2gco(t));
+ } else if (tvisudata(o)) {
+ setgcref(udataV(o)->env, obj2gco(t));
+ } else if (tvisthread(o)) {
+ setgcref(threadV(o)->env, obj2gco(t));
+ } else {
+ L->top--;
+ return 0;
+ }
+ lj_gc_objbarrier(L, gcV(o), t);
+ L->top--;
+ return 1;
+}
+
+LUA_API const char *lua_setupvalue(lua_State *L, int idx, int n)
+{
+ cTValue *f = index2adr(L, idx);
+ TValue *val;
+ const char *name;
+ api_checknelems(L, 1);
+ name = lj_debug_uvnamev(f, (uint32_t)(n-1), &val);
+ if (name) {
+ L->top--;
+ copyTV(L, val, L->top);
+ lj_gc_barrier(L, funcV(f), L->top);
+ }
+ return name;
+}
+
+/* -- Calls --------------------------------------------------------------- */
+
+#if LJ_FR2
+static TValue *api_call_base(lua_State *L, int nargs)
+{
+ TValue *o = L->top, *base = o - nargs;
+ L->top = o+1;
+ for (; o > base; o--) copyTV(L, o, o-1);
+ setnilV(o);
+ return o+1;
+}
+#else
+#define api_call_base(L, nargs) (L->top - (nargs))
+#endif
+
+LUA_API void lua_call(lua_State *L, int nargs, int nresults)
+{
+ api_check(L, L->status == 0 || L->status == LUA_ERRERR);
+ api_checknelems(L, nargs+1);
+ lj_vm_call(L, api_call_base(L, nargs), nresults+1);
+}
+
+LUA_API int lua_pcall(lua_State *L, int nargs, int nresults, int errfunc)
+{
+ global_State *g = G(L);
+ uint8_t oldh = hook_save(g);
+ ptrdiff_t ef;
+ int status;
+ api_check(L, L->status == 0 || L->status == LUA_ERRERR);
+ api_checknelems(L, nargs+1);
+ if (errfunc == 0) {
+ ef = 0;
+ } else {
+ cTValue *o = stkindex2adr(L, errfunc);
+ api_checkvalidindex(L, o);
+ ef = savestack(L, o);
+ }
+ status = lj_vm_pcall(L, api_call_base(L, nargs), nresults+1, ef);
+ if (status) hook_restore(g, oldh);
+ return status;
+}
+
+static TValue *cpcall(lua_State *L, lua_CFunction func, void *ud)
+{
+ GCfunc *fn = lj_func_newC(L, 0, getcurrenv(L));
+ TValue *top = L->top;
+ fn->c.f = func;
+ setfuncV(L, top++, fn);
+ if (LJ_FR2) setnilV(top++);
+ setlightudV(top++, checklightudptr(L, ud));
+ cframe_nres(L->cframe) = 1+0; /* Zero results. */
+ L->top = top;
+ return top-1; /* Now call the newly allocated C function. */
+}
+
+LUA_API int lua_cpcall(lua_State *L, lua_CFunction func, void *ud)
+{
+ global_State *g = G(L);
+ uint8_t oldh = hook_save(g);
+ int status;
+ api_check(L, L->status == 0 || L->status == LUA_ERRERR);
+ status = lj_vm_cpcall(L, func, ud, cpcall);
+ if (status) hook_restore(g, oldh);
+ return status;
+}
+
+LUALIB_API int luaL_callmeta(lua_State *L, int idx, const char *field)
+{
+ if (luaL_getmetafield(L, idx, field)) {
+ TValue *top = L->top--;
+ if (LJ_FR2) setnilV(top++);
+ copyTV(L, top++, index2adr(L, idx));
+ L->top = top;
+ lj_vm_call(L, top-1, 1+1);
+ return 1;
+ }
+ return 0;
+}
+
+/* -- Coroutine yield and resume ------------------------------------------ */
+
+LUA_API int lua_yield(lua_State *L, int nresults)
+{
+ void *cf = L->cframe;
+ global_State *g = G(L);
+ if (cframe_canyield(cf)) {
+ cf = cframe_raw(cf);
+ if (!hook_active(g)) { /* Regular yield: move results down if needed. */
+ cTValue *f = L->top - nresults;
+ if (f > L->base) {
+ TValue *t = L->base;
+ while (--nresults >= 0) copyTV(L, t++, f++);
+ L->top = t;
+ }
+ L->cframe = NULL;
+ L->status = LUA_YIELD;
+ return -1;
+ } else { /* Yield from hook: add a pseudo-frame. */
+ TValue *top = L->top;
+ hook_leave(g);
+ (top++)->u64 = cframe_multres(cf);
+ setcont(top, lj_cont_hook);
+ if (LJ_FR2) top++;
+ setframe_pc(top, cframe_pc(cf)-1);
+ if (LJ_FR2) top++;
+ setframe_gc(top, obj2gco(L), LJ_TTHREAD);
+ setframe_ftsz(top, ((char *)(top+1)-(char *)L->base)+FRAME_CONT);
+ L->top = L->base = top+1;
+#if LJ_TARGET_X64
+ lj_err_throw(L, LUA_YIELD);
+#else
+ L->cframe = NULL;
+ L->status = LUA_YIELD;
+ lj_vm_unwind_c(cf, LUA_YIELD);
+#endif
+ }
+ }
+ lj_err_msg(L, LJ_ERR_CYIELD);
+ return 0; /* unreachable */
+}
+
+LUA_API int lua_resume(lua_State *L, int nargs)
+{
+ if (L->cframe == NULL && L->status <= LUA_YIELD)
+ return lj_vm_resume(L,
+ L->status == 0 ? api_call_base(L, nargs) : L->top - nargs,
+ 0, 0);
+ L->top = L->base;
+ setstrV(L, L->top, lj_err_str(L, LJ_ERR_COSUSP));
+ incr_top(L);
+ return LUA_ERRRUN;
+}
+
+/* -- GC and memory management -------------------------------------------- */
+
+LUA_API int lua_gc(lua_State *L, int what, int data)
+{
+ global_State *g = G(L);
+ int res = 0;
+ switch (what) {
+ case LUA_GCSTOP:
+ g->gc.threshold = LJ_MAX_MEM;
+ break;
+ case LUA_GCRESTART:
+ g->gc.threshold = data == -1 ? (g->gc.total/100)*g->gc.pause : g->gc.total;
+ break;
+ case LUA_GCCOLLECT:
+ lj_gc_fullgc(L);
+ break;
+ case LUA_GCCOUNT:
+ res = (int)(g->gc.total >> 10);
+ break;
+ case LUA_GCCOUNTB:
+ res = (int)(g->gc.total & 0x3ff);
+ break;
+ case LUA_GCSTEP: {
+ GCSize a = (GCSize)data << 10;
+ g->gc.threshold = (a <= g->gc.total) ? (g->gc.total - a) : 0;
+ while (g->gc.total >= g->gc.threshold)
+ if (lj_gc_step(L) > 0) {
+ res = 1;
+ break;
+ }
+ break;
+ }
+ case LUA_GCSETPAUSE:
+ res = (int)(g->gc.pause);
+ g->gc.pause = (MSize)data;
+ break;
+ case LUA_GCSETSTEPMUL:
+ res = (int)(g->gc.stepmul);
+ g->gc.stepmul = (MSize)data;
+ break;
+ default:
+ res = -1; /* Invalid option. */
+ }
+ return res;
+}
+
+LUA_API lua_Alloc lua_getallocf(lua_State *L, void **ud)
+{
+ global_State *g = G(L);
+ if (ud) *ud = g->allocd;
+ return g->allocf;
+}
+
+LUA_API void lua_setallocf(lua_State *L, lua_Alloc f, void *ud)
+{
+ global_State *g = G(L);
+ g->allocd = ud;
+ g->allocf = f;
+}
+