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ltests.c
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ltests.c
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/*
** $Id: ltests.c,v 2.135 2013/03/16 21:10:18 roberto Exp $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ltests_c
#define LUA_CORE
#include "lua.h"
#include "lapi.h"
#include "lauxlib.h"
#include "lcode.h"
#include "lctype.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lmem.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "lualib.h"
/*
** The whole module only makes sense with LUA_DEBUG on
*/
#if defined(LUA_DEBUG)
void *l_Trick = 0;
int islocked = 0;
#define obj_at(L,k) (L->ci->func + (k))
static void setnameval (lua_State *L, const char *name, int val) {
lua_pushstring(L, name);
lua_pushinteger(L, val);
lua_settable(L, -3);
}
static void pushobject (lua_State *L, const TValue *o) {
setobj2s(L, L->top, o);
api_incr_top(L);
}
static int tpanic (lua_State *L) {
fprintf(stderr, "PANIC: unprotected error in call to Lua API (%s)\n",
lua_tostring(L, -1));
return (exit(EXIT_FAILURE), 0); /* do not return to Lua */
}
/*
** {======================================================================
** Controlled version for realloc.
** =======================================================================
*/
#define MARK 0x55 /* 01010101 (a nice pattern) */
typedef union Header {
L_Umaxalign a; /* ensures maximum alignment for Header */
struct {
size_t size;
int type;
} d;
} Header;
#if !defined(EXTERNMEMCHECK)
/* full memory check */
#define MARKSIZE 16 /* size of marks after each block */
#define fillmem(mem,size) memset(mem, -MARK, size)
#else
/* external memory check: don't do it twice */
#define MARKSIZE 0
#define fillmem(mem,size) /* empty */
#endif
Memcontrol l_memcontrol =
{0L, 0L, 0L, 0L, {0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L, 0L}};
static void freeblock (Memcontrol *mc, Header *block) {
if (block) {
size_t size = block->d.size;
int i;
for (i = 0; i < MARKSIZE; i++) /* check marks after block */
lua_assert(*(cast(char *, block + 1) + size + i) == MARK);
mc->objcount[block->d.type]--;
fillmem(block, sizeof(Header) + size + MARKSIZE); /* erase block */
free(block); /* actually free block */
mc->numblocks--; /* update counts */
mc->total -= size;
}
}
void *debug_realloc (void *ud, void *b, size_t oldsize, size_t size) {
Memcontrol *mc = cast(Memcontrol *, ud);
Header *block = cast(Header *, b);
int type;
if (mc->memlimit == 0) { /* first time? */
char *limit = getenv("MEMLIMIT"); /* initialize memory limit */
mc->memlimit = limit ? strtoul(limit, NULL, 10) : ULONG_MAX;
}
if (block == NULL) {
type = (oldsize < LUA_NUMTAGS) ? oldsize : 0;
oldsize = 0;
}
else {
block--; /* go to real header */
type = block->d.type;
lua_assert(oldsize == block->d.size);
}
if (size == 0) {
freeblock(mc, block);
return NULL;
}
else if (size > oldsize && mc->total+size-oldsize > mc->memlimit)
return NULL; /* fake a memory allocation error */
else {
Header *newblock;
int i;
size_t commonsize = (oldsize < size) ? oldsize : size;
size_t realsize = sizeof(Header) + size + MARKSIZE;
if (realsize < size) return NULL; /* arithmetic overflow! */
newblock = cast(Header *, malloc(realsize)); /* alloc a new block */
if (newblock == NULL) return NULL; /* really out of memory? */
if (block) {
memcpy(newblock + 1, block + 1, commonsize); /* copy old contents */
freeblock(mc, block); /* erase (and check) old copy */
}
/* initialize new part of the block with something `weird' */
fillmem(cast(char *, newblock + 1) + commonsize, size - commonsize);
/* initialize marks after block */
for (i = 0; i < MARKSIZE; i++)
*(cast(char *, newblock + 1) + size + i) = MARK;
newblock->d.size = size;
newblock->d.type = type;
mc->total += size;
if (mc->total > mc->maxmem)
mc->maxmem = mc->total;
mc->numblocks++;
mc->objcount[type]++;
return newblock + 1;
}
}
/* }====================================================================== */
/*
** {======================================================
** Functions to check memory consistency
** =======================================================
*/
static int testobjref1 (global_State *g, GCObject *f, GCObject *t) {
if (isdead(g,t)) return 0;
if (!issweepphase(g))
return !(isblack(f) && iswhite(t));
else return 1;
}
static void printobj (global_State *g, GCObject *o) {
int i = 1;
GCObject *p;
for (p = g->allgc; p != o && p != NULL; p = gch(p)->next) i++;
if (p == NULL) {
i = 1;
for (p = g->finobj; p != o && p != NULL; p = gch(p)->next) i++;
if (p == NULL) i = 0; /* zero means 'not found' */
else i = -i; /* negative means 'found in findobj list */
}
printf("||%d:%s(%p)-%c(%02X)||", i, ttypename(gch(o)->tt), (void *)o,
isdead(g,o)?'d':isblack(o)?'b':iswhite(o)?'w':'g', gch(o)->marked);
}
static int testobjref (global_State *g, GCObject *f, GCObject *t) {
int r = testobjref1(g,f,t);
if (!r) {
printf("%d(%02X) - ", g->gcstate, g->currentwhite);
printobj(g, f);
printf("\t-> ");
printobj(g, t);
printf("\n");
}
return r;
}
#define checkobjref(g,f,t) lua_assert(testobjref(g,f,obj2gco(t)))
static void checkvalref (global_State *g, GCObject *f, const TValue *t) {
if (iscollectable(t)) {
lua_assert(righttt(t));
lua_assert(testobjref(g, f, gcvalue(t)));
}
}
static void checktable (global_State *g, Table *h) {
int i;
Node *n, *limit = gnode(h, sizenode(h));
GCObject *hgc = obj2gco(h);
if (h->metatable)
checkobjref(g, hgc, h->metatable);
for (i = 0; i < h->sizearray; i++)
checkvalref(g, hgc, &h->array[i]);
for (n = gnode(h, 0); n < limit; n++) {
if (!ttisnil(gval(n))) {
lua_assert(!ttisnil(gkey(n)));
checkvalref(g, hgc, gkey(n));
checkvalref(g, hgc, gval(n));
}
}
}
/*
** All marks are conditional because a GC may happen while the
** prototype is still being created
*/
static void checkproto (global_State *g, Proto *f) {
int i;
GCObject *fgc = obj2gco(f);
if (f->source) checkobjref(g, fgc, f->source);
for (i=0; i<f->sizek; i++) {
if (ttisstring(f->k+i))
checkobjref(g, fgc, rawtsvalue(f->k+i));
}
for (i=0; i<f->sizeupvalues; i++) {
if (f->upvalues[i].name)
checkobjref(g, fgc, f->upvalues[i].name);
}
for (i=0; i<f->sizep; i++) {
if (f->p[i])
checkobjref(g, fgc, f->p[i]);
}
for (i=0; i<f->sizelocvars; i++) {
if (f->locvars[i].varname)
checkobjref(g, fgc, f->locvars[i].varname);
}
}
static void checkCclosure (global_State *g, CClosure *cl) {
GCObject *clgc = obj2gco(cl);
int i;
for (i = 0; i < cl->nupvalues; i++)
checkvalref(g, clgc, &cl->upvalue[i]);
}
static void checkLclosure (global_State *g, LClosure *cl) {
GCObject *clgc = obj2gco(cl);
int i;
if (cl->p) checkobjref(g, clgc, cl->p);
for (i=0; i<cl->nupvalues; i++) {
if (cl->upvals[i]) {
lua_assert(cl->upvals[i]->tt == LUA_TUPVAL);
checkobjref(g, clgc, cl->upvals[i]);
}
}
}
static int lua_checkpc (pCallInfo ci) {
if (!isLua(ci)) return 1;
else {
Proto *p = ci_func(ci)->p;
return p->code <= ci->u.l.savedpc &&
ci->u.l.savedpc <= p->code + p->sizecode;
}
}
static void checkstack (global_State *g, lua_State *L1) {
StkId o;
CallInfo *ci;
GCObject *uvo;
lua_assert(!isdead(g, obj2gco(L1)));
for (uvo = L1->openupval; uvo != NULL; uvo = gch(uvo)->next) {
UpVal *uv = gco2uv(uvo);
lua_assert(uv->v != &uv->u.value); /* must be open */
lua_assert(!isblack(uvo)); /* open upvalues cannot be black */
}
for (ci = L1->ci; ci != NULL; ci = ci->previous) {
lua_assert(ci->top <= L1->stack_last);
lua_assert(lua_checkpc(ci));
}
if (L1->stack) {
for (o = L1->stack; o < L1->top; o++)
checkliveness(g, o);
}
else lua_assert(L1->stacksize == 0);
}
static void checkobject (global_State *g, GCObject *o, int maybedead) {
if (isdead(g, o))
lua_assert(maybedead);
else {
if (g->gcstate == GCSpause)
lua_assert(iswhite(o));
switch (gch(o)->tt) {
case LUA_TUPVAL: {
UpVal *uv = gco2uv(o);
lua_assert(uv->v == &uv->u.value); /* must be closed */
lua_assert(!isgray(o)); /* closed upvalues are never gray */
checkvalref(g, o, uv->v);
break;
}
case LUA_TUSERDATA: {
Table *mt = gco2u(o)->metatable;
if (mt) checkobjref(g, o, mt);
break;
}
case LUA_TTABLE: {
checktable(g, gco2t(o));
break;
}
case LUA_TTHREAD: {
checkstack(g, gco2th(o));
break;
}
case LUA_TLCL: {
checkLclosure(g, gco2lcl(o));
break;
}
case LUA_TCCL: {
checkCclosure(g, gco2ccl(o));
break;
}
case LUA_TPROTO: {
checkproto(g, gco2p(o));
break;
}
case LUA_TSHRSTR:
case LUA_TLNGSTR: break;
default: lua_assert(0);
}
}
}
#define TESTGRAYBIT 7
static void checkgraylist (GCObject *l) {
while (l) {
lua_assert(isgray(l));
lua_assert(!testbit(l->gch.marked, TESTGRAYBIT));
l_setbit(l->gch.marked, TESTGRAYBIT);
switch (gch(l)->tt) {
case LUA_TTABLE: l = gco2t(l)->gclist; break;
case LUA_TLCL: l = gco2lcl(l)->gclist; break;
case LUA_TCCL: l = gco2ccl(l)->gclist; break;
case LUA_TTHREAD: l = gco2th(l)->gclist; break;
case LUA_TPROTO: l = gco2p(l)->gclist; break;
default: lua_assert(0); /* other objects cannot be gray */
}
}
}
/*
** mark all objects in gray lists with the TESTGRAYBIT, so that
** 'checkmemory' can check that all gray objects are in a gray list
*/
static void markgrays (global_State *g) {
if (!keepinvariant(g)) return;
checkgraylist(g->gray);
checkgraylist(g->grayagain);
checkgraylist(g->weak);
checkgraylist(g->ephemeron);
checkgraylist(g->allweak);
}
static void checkold (global_State *g, GCObject *o) {
int isold = 0;
for (; o != NULL; o = gch(o)->next) {
if (isold(o)) { /* old generation? */
lua_assert(isgenerational(g));
if (!issweepphase(g))
isold = 1;
}
else lua_assert(!isold); /* non-old object cannot be after an old one */
if (isgray(o)) {
lua_assert(!keepinvariant(g) || testbit(o->gch.marked, TESTGRAYBIT));
resetbit(o->gch.marked, TESTGRAYBIT);
}
lua_assert(!testbit(o->gch.marked, TESTGRAYBIT));
}
}
int lua_checkmemory (lua_State *L) {
global_State *g = G(L);
GCObject *o;
UpVal *uv;
int maybedead;
if (keepinvariant(g)) {
lua_assert(!iswhite(obj2gco(g->mainthread)));
lua_assert(!iswhite(gcvalue(&g->l_registry)));
}
else /* generational mode keeps collector in 'propagate' state */
lua_assert(!isgenerational(g));
lua_assert(!isdead(g, gcvalue(&g->l_registry)));
checkstack(g, g->mainthread);
resetbit(g->mainthread->marked, TESTGRAYBIT);
/* check 'allgc' list */
markgrays(g);
checkold(g, g->allgc);
lua_assert(g->sweepgc == NULL || issweepphase(g));
maybedead = 0;
for (o = g->allgc; o != NULL; o = gch(o)->next) {
if (g->sweepgc && o == *g->sweepgc)
maybedead = 1; /* part of the list not yet swept */
checkobject(g, o, maybedead);
lua_assert(!testbit(o->gch.marked, SEPARATED));
}
/* check 'finobj' list */
checkold(g, g->finobj);
for (o = g->finobj; o != NULL; o = gch(o)->next) {
lua_assert(testbit(o->gch.marked, SEPARATED));
lua_assert(gch(o)->tt == LUA_TUSERDATA ||
gch(o)->tt == LUA_TTABLE);
checkobject(g, o, 0);
}
/* check 'tobefnz' list */
checkold(g, g->tobefnz);
for (o = g->tobefnz; o != NULL; o = gch(o)->next) {
lua_assert(!iswhite(o) || g->gcstate == GCSpause);
lua_assert(!isdead(g, o) && testbit(o->gch.marked, SEPARATED));
lua_assert(gch(o)->tt == LUA_TUSERDATA ||
gch(o)->tt == LUA_TTABLE);
}
/* check 'uvhead' list */
for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) {
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
lua_assert(uv->v != &uv->u.value); /* must be open */
lua_assert(!isblack(obj2gco(uv))); /* open upvalues are never black */
if (!isdead(g, obj2gco(uv)))
checkvalref(g, obj2gco(uv), uv->v);
}
return 0;
}
/* }====================================================== */
/*
** {======================================================
** Disassembler
** =======================================================
*/
static char *buildop (Proto *p, int pc, char *buff) {
Instruction i = p->code[pc];
OpCode o = GET_OPCODE(i);
const char *name = luaP_opnames[o];
int line = getfuncline(p, pc);
sprintf(buff, "(%4d) %4d - ", line, pc);
switch (getOpMode(o)) {
case iABC:
sprintf(buff+strlen(buff), "%-12s%4d %4d %4d", name,
GETARG_A(i), GETARG_B(i), GETARG_C(i));
break;
case iABx:
sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_Bx(i));
break;
case iAsBx:
sprintf(buff+strlen(buff), "%-12s%4d %4d", name, GETARG_A(i), GETARG_sBx(i));
break;
case iAx:
sprintf(buff+strlen(buff), "%-12s%4d", name, GETARG_Ax(i));
break;
}
return buff;
}
#if 0
void luaI_printcode (Proto *pt, int size) {
int pc;
for (pc=0; pc<size; pc++) {
char buff[100];
printf("%s\n", buildop(pt, pc, buff));
}
printf("-------\n");
}
void luaI_printinst (Proto *pt, int pc) {
char buff[100];
printf("%s\n", buildop(pt, pc, buff));
}
#endif
static int listcode (lua_State *L) {
int pc;
Proto *p;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = getproto(obj_at(L, 1));
lua_newtable(L);
setnameval(L, "maxstack", p->maxstacksize);
setnameval(L, "numparams", p->numparams);
for (pc=0; pc<p->sizecode; pc++) {
char buff[100];
lua_pushinteger(L, pc+1);
lua_pushstring(L, buildop(p, pc, buff));
lua_settable(L, -3);
}
return 1;
}
static int listk (lua_State *L) {
Proto *p;
int i;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = getproto(obj_at(L, 1));
lua_createtable(L, p->sizek, 0);
for (i=0; i<p->sizek; i++) {
pushobject(L, p->k+i);
lua_rawseti(L, -2, i+1);
}
return 1;
}
static int listlocals (lua_State *L) {
Proto *p;
int pc = luaL_checkint(L, 2) - 1;
int i = 0;
const char *name;
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
1, "Lua function expected");
p = getproto(obj_at(L, 1));
while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
lua_pushstring(L, name);
return i-1;
}
/* }====================================================== */
static int get_limits (lua_State *L) {
lua_createtable(L, 0, 5);
setnameval(L, "BITS_INT", LUAI_BITSINT);
setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
setnameval(L, "MAXSTACK", MAXSTACK);
setnameval(L, "NUM_OPCODES", NUM_OPCODES);
return 1;
}
static int mem_query (lua_State *L) {
if (lua_isnone(L, 1)) {
lua_pushinteger(L, l_memcontrol.total);
lua_pushinteger(L, l_memcontrol.numblocks);
lua_pushinteger(L, l_memcontrol.maxmem);
return 3;
}
else if (lua_isnumber(L, 1)) {
l_memcontrol.memlimit = luaL_checkint(L, 1);
return 0;
}
else {
const char *t = luaL_checkstring(L, 1);
int i;
for (i = LUA_NUMTAGS - 1; i >= 0; i--) {
if (strcmp(t, ttypename(i)) == 0) {
lua_pushinteger(L, l_memcontrol.objcount[i]);
return 1;
}
}
return luaL_error(L, "unkown type '%s'", t);
}
}
static int settrick (lua_State *L) {
if (ttisnil(obj_at(L, 1)))
l_Trick = NULL;
else
l_Trick = gcvalue(obj_at(L, 1));
return 0;
}
static int get_gccolor (lua_State *L) {
TValue *o;
luaL_checkany(L, 1);
o = obj_at(L, 1);
if (!iscollectable(o))
lua_pushstring(L, "no collectable");
else {
int marked = gcvalue(o)->gch.marked;
int n = 1;
lua_pushstring(L, iswhite(gcvalue(o)) ? "white" :
isblack(gcvalue(o)) ? "black" : "grey");
if (testbit(marked, FINALIZEDBIT)) {
lua_pushliteral(L, "/finalized"); n++;
}
if (testbit(marked, SEPARATED)) {
lua_pushliteral(L, "/separated"); n++;
}
if (testbit(marked, FIXEDBIT)) {
lua_pushliteral(L, "/fixed"); n++;
}
if (testbit(marked, OLDBIT)) {
lua_pushliteral(L, "/old"); n++;
}
lua_concat(L, n);
}
return 1;
}
static int gc_state (lua_State *L) {
static const char *statenames[] = {"propagate", "atomic",
"sweepstring", "sweepudata", "sweep", "pause", ""};
int option = luaL_checkoption(L, 1, "", statenames);
if (option == GCSpause + 1) {
lua_pushstring(L, statenames[G(L)->gcstate]);
return 1;
}
else {
global_State *g = G(L);
if (g->gckind == KGC_GEN && option == GCSpause)
luaL_error(L, "cannot go to 'pause' state in generational mode");
lua_lock(L);
if (option < g->gcstate) { /* must cross 'pause'? */
luaC_runtilstate(L, bitmask(GCSpause)); /* run until pause */
if (g->gckind == KGC_GEN)
g->gcstate = GCSpropagate; /* skip pause in gen. mode */
}
luaC_runtilstate(L, bitmask(option));
lua_assert(G(L)->gcstate == option);
lua_unlock(L);
return 0;
}
}
static int hash_query (lua_State *L) {
if (lua_isnone(L, 2)) {
luaL_argcheck(L, lua_type(L, 1) == LUA_TSTRING, 1, "string expected");
lua_pushinteger(L, tsvalue(obj_at(L, 1))->hash);
}
else {
TValue *o = obj_at(L, 1);
Table *t;
luaL_checktype(L, 2, LUA_TTABLE);
t = hvalue(obj_at(L, 2));
lua_pushinteger(L, luaH_mainposition(t, o) - t->node);
}
return 1;
}
static int stacklevel (lua_State *L) {
unsigned long a = 0;
lua_pushinteger(L, (L->top - L->stack));
lua_pushinteger(L, (L->stack_last - L->stack));
lua_pushinteger(L, (unsigned long)&a);
return 5;
}
static int table_query (lua_State *L) {
const Table *t;
int i = luaL_optint(L, 2, -1);
luaL_checktype(L, 1, LUA_TTABLE);
t = hvalue(obj_at(L, 1));
if (i == -1) {
lua_pushinteger(L, t->sizearray);
lua_pushinteger(L, luaH_isdummy(t->node) ? 0 : sizenode(t));
lua_pushinteger(L, t->lastfree - t->node);
}
else if (i < t->sizearray) {
lua_pushinteger(L, i);
pushobject(L, &t->array[i]);
lua_pushnil(L);
}
else if ((i -= t->sizearray) < sizenode(t)) {
if (!ttisnil(gval(gnode(t, i))) ||
ttisnil(gkey(gnode(t, i))) ||
ttisnumber(gkey(gnode(t, i)))) {
pushobject(L, gkey(gnode(t, i)));
}
else
lua_pushliteral(L, "<undef>");
pushobject(L, gval(gnode(t, i)));
if (gnext(&t->node[i]))
lua_pushinteger(L, gnext(&t->node[i]) - t->node);
else
lua_pushnil(L);
}
return 3;
}
static int string_query (lua_State *L) {
stringtable *tb = &G(L)->strt;
int s = luaL_optint(L, 2, 0) - 1;
if (s==-1) {
lua_pushinteger(L ,tb->nuse);
lua_pushinteger(L ,tb->size);
return 2;
}
else if (s < tb->size) {
GCObject *ts;
int n = 0;
for (ts = tb->hash[s]; ts; ts = gch(ts)->next) {
setsvalue2s(L, L->top, rawgco2ts(ts));
api_incr_top(L);
n++;
}
return n;
}
return 0;
}
static int tref (lua_State *L) {
int level = lua_gettop(L);
luaL_checkany(L, 1);
lua_pushvalue(L, 1);
lua_pushinteger(L, luaL_ref(L, LUA_REGISTRYINDEX));
lua_assert(lua_gettop(L) == level+1); /* +1 for result */
return 1;
}
static int getref (lua_State *L) {
int level = lua_gettop(L);
lua_rawgeti(L, LUA_REGISTRYINDEX, luaL_checkint(L, 1));
lua_assert(lua_gettop(L) == level+1);
return 1;
}
static int unref (lua_State *L) {
int level = lua_gettop(L);
luaL_unref(L, LUA_REGISTRYINDEX, luaL_checkint(L, 1));
lua_assert(lua_gettop(L) == level);
return 0;
}
static int upvalue (lua_State *L) {
int n = luaL_checkint(L, 2);
luaL_checktype(L, 1, LUA_TFUNCTION);
if (lua_isnone(L, 3)) {
const char *name = lua_getupvalue(L, 1, n);
if (name == NULL) return 0;
lua_pushstring(L, name);
return 2;
}
else {
const char *name = lua_setupvalue(L, 1, n);
lua_pushstring(L, name);
return 1;
}
}
static int newuserdata (lua_State *L) {
size_t size = luaL_checkint(L, 1);
char *p = cast(char *, lua_newuserdata(L, size));
while (size--) *p++ = '\0';
return 1;
}
static int pushuserdata (lua_State *L) {
lua_pushlightuserdata(L, cast(void *, luaL_checkinteger(L, 1)));
return 1;
}
static int udataval (lua_State *L) {
lua_pushinteger(L, cast(long, lua_touserdata(L, 1)));
return 1;
}
static int doonnewstack (lua_State *L) {
lua_State *L1 = lua_newthread(L);
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
int status = luaL_loadbuffer(L1, s, l, s);
if (status == LUA_OK)
status = lua_pcall(L1, 0, 0, 0);
lua_pushinteger(L, status);
return 1;
}
static int s2d (lua_State *L) {
lua_pushnumber(L, *cast(const double *, luaL_checkstring(L, 1)));
return 1;
}
static int d2s (lua_State *L) {
double d = luaL_checknumber(L, 1);
lua_pushlstring(L, cast(char *, &d), sizeof(d));
return 1;
}
static int num2int (lua_State *L) {
lua_pushinteger(L, lua_tointeger(L, 1));
return 1;
}
static int newstate (lua_State *L) {
void *ud;
lua_Alloc f = lua_getallocf(L, &ud);
lua_State *L1 = lua_newstate(f, ud);
if (L1) {
lua_atpanic(L1, tpanic);
lua_pushlightuserdata(L, L1);
}
else
lua_pushnil(L);
return 1;
}
static lua_State *getstate (lua_State *L) {
lua_State *L1 = cast(lua_State *, lua_touserdata(L, 1));
luaL_argcheck(L, L1 != NULL, 1, "state expected");
return L1;
}
static int loadlib (lua_State *L) {
static const luaL_Reg libs[] = {
{"_G", luaopen_base},
{"coroutine", luaopen_coroutine},
{"debug", luaopen_debug},
{"io", luaopen_io},
{"os", luaopen_os},
{"math", luaopen_math},
{"string", luaopen_string},
{"table", luaopen_table},
{NULL, NULL}
};
lua_State *L1 = getstate(L);
int i;
luaL_requiref(L1, "package", luaopen_package, 1);
luaL_getsubtable(L1, LUA_REGISTRYINDEX, "_PRELOAD");
for (i = 0; libs[i].name; i++) {
lua_pushcfunction(L1, libs[i].func);
lua_setfield(L1, -2, libs[i].name);
}
return 0;
}
static int closestate (lua_State *L) {
lua_State *L1 = getstate(L);
lua_close(L1);
return 0;
}
static int doremote (lua_State *L) {
lua_State *L1 = getstate(L);
size_t lcode;
const char *code = luaL_checklstring(L, 2, &lcode);
int status;
lua_settop(L1, 0);
status = luaL_loadbuffer(L1, code, lcode, code);
if (status == LUA_OK)
status = lua_pcall(L1, 0, LUA_MULTRET, 0);
if (status != LUA_OK) {
lua_pushnil(L);
lua_pushstring(L, lua_tostring(L1, -1));
lua_pushinteger(L, status);
return 3;
}
else {
int i = 0;
while (!lua_isnone(L1, ++i))
lua_pushstring(L, lua_tostring(L1, i));
lua_pop(L1, i-1);
return i-1;
}
}
static int int2fb_aux (lua_State *L) {
int b = luaO_int2fb(luaL_checkint(L, 1));
lua_pushinteger(L, b);
lua_pushinteger(L, luaO_fb2int(b));
return 2;
}
/*
** {======================================================
** function to test the API with C. It interprets a kind of assembler
** language with calls to the API, so the test can be driven by Lua code
** =======================================================
*/
static void sethookaux (lua_State *L, int mask, int count, const char *code);
static const char *const delimits = " \t\n,;";
static void skip (const char **pc) {
for (;;) {
if (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
else if (**pc == '#') {
while (**pc != '\n' && **pc != '\0') (*pc)++;
}
else break;
}
}
static int getnum_aux (lua_State *L, lua_State *L1, const char **pc) {
int res = 0;
int sig = 1;
skip(pc);
if (**pc == '.') {
res = lua_tointeger(L1, -1);
lua_pop(L1, 1);
(*pc)++;
return res;
}
else if (**pc == '-') {
sig = -1;
(*pc)++;
}
if (!lisdigit(cast_uchar(**pc)))
luaL_error(L, "number expected (%s)", *pc);
while (lisdigit(cast_uchar(**pc))) res = res*10 + (*(*pc)++) - '0';
return sig*res;
}
static const char *getstring_aux (lua_State *L, char *buff, const char **pc) {
int i = 0;
skip(pc);
if (**pc == '"' || **pc == '\'') { /* quoted string? */
int quote = *(*pc)++;
while (**pc != quote) {
if (**pc == '\0') luaL_error(L, "unfinished string in C script");
buff[i++] = *(*pc)++;
}
(*pc)++;
}
else {
while (**pc != '\0' && !strchr(delimits, **pc))
buff[i++] = *(*pc)++;
}
buff[i] = '\0';
return buff;
}