ltests.cpp

这个是symbian下的一个蛮庞大的3D游戏源代码！对于学习3D开发的人有很大的帮助！

/*
** $Id: ltests.cpp,v 1.1.1.1 2006/02/20 15:43:37 kajala Exp $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/


#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define ltests_c

#include "lua.h"

#include "lapi.h"
#include "lauxlib.h"
#include "lcode.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
*/
#ifdef LUA_DEBUG


#define lua_pushintegral(L,i)	lua_pushnumber(L, cast(lua_Number, (i)))


static lua_State *lua_state = 0;

int islocked = 0;


#define func_at(L,k)	(L->ci->base+(k) - 1)


static void setnameval (lua_State *L, const char *name, int val) {
  lua_pushstring(L, name);
  lua_pushintegral(L, val);
  lua_settable(L, -3);
}


/*
** {======================================================================
** Controlled version for realloc.
** =======================================================================
*/

#define MARK		0x55  /* 01010101 (a nice pattern) */

#ifndef EXTERNMEMCHECK
/* full memory check */
#define HEADER	(sizeof(L_Umaxalign)) /* ensures maximum alignment for HEADER */
#define MARKSIZE	16  /* size of marks after each block */
#define blockhead(b)	(cast(char *, b) - HEADER)
#define setsize(newblock, size)	(*cast(size_t *, newblock) = size)
#define checkblocksize(b, size) (size == (*cast(size_t *, blockhead(b))))
#define fillmem(mem,size)	memset(mem, -MARK, size)
#else
/* external memory check: don't do it twice */
#define HEADER		0
#define MARKSIZE	0
#define blockhead(b)	(b)
#define setsize(newblock, size)	/* empty */
#define checkblocksize(b,size)	(1)
#define fillmem(mem,size)	/* empty */
#endif

unsigned long memdebug_numblocks = 0;
unsigned long memdebug_total = 0;
unsigned long memdebug_maxmem = 0;
unsigned long memdebug_memlimit = ULONG_MAX;


static void *checkblock (void *block, size_t size) {
  void *b = blockhead(block);
  int i;
  for (i=0;i<MARKSIZE;i++)
    lua_assert(*(cast(char *, b)+HEADER+size+i) == MARK+i); /* corrupted block? */
  return b;
}


static void freeblock (void *block, size_t size) {
  if (block) {
    lua_assert(checkblocksize(block, size));
    block = checkblock(block, size);
    fillmem(block, size+HEADER+MARKSIZE);  /* erase block */
    free(block);  /* free original block */
    memdebug_numblocks--;
    memdebug_total -= size;
  }
}


void *debug_realloc (void *block, size_t oldsize, size_t size) {
  lua_assert(oldsize == 0 || checkblocksize(block, oldsize));
  /* ISO does not specify what realloc(0, 0) does */
  lua_assert(block != 0 || size > 0);
  if (size == 0) {
    freeblock(block, oldsize);
    return 0;
  }
  else if (size > oldsize && memdebug_total+size-oldsize > memdebug_memlimit)
    return 0;  /* to test memory allocation errors */
  else {
    void *newblock;
    int i;
    size_t realsize = HEADER+size+MARKSIZE;
    size_t commonsize = (oldsize < size) ? oldsize : size;
    if (realsize < size) return 0;  /* overflow! */
    newblock = malloc(realsize);  /* alloc a new block */
    if (newblock == 0) return 0;
    if (block) {
      memcpy(cast(char *, newblock)+HEADER, block, commonsize);
      freeblock(block, oldsize);  /* erase (and check) old copy */
    }
    /* initialize new part of the block with something `weird' */
    fillmem(cast(char *, newblock)+HEADER+commonsize, size-commonsize);
    memdebug_total += size;
    if (memdebug_total > memdebug_maxmem)
      memdebug_maxmem = memdebug_total;
    memdebug_numblocks++;
    setsize(newblock, size);
    for (i=0;i<MARKSIZE;i++)
      *(cast(char *, newblock)+HEADER+size+i) = cast(char, MARK+i);
    return cast(char *, newblock)+HEADER;
  }
}


/* }====================================================================== */



/*
** {======================================================
** 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 = getline(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;
  }
  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");
}
#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 = clvalue(func_at(L, 1))->l.p;
  lua_newtable(L);
  setnameval(L, "maxstack", p->maxstacksize);
  setnameval(L, "numparams", p->numparams);
  for (pc=0; pc<p->sizecode; pc++) {
    char buff[100];
    lua_pushintegral(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 = clvalue(func_at(L, 1))->l.p;
  lua_newtable(L);
  for (i=0; i<p->sizek; i++) {
    lua_pushintegral(L, i+1);
    luaA_pushobject(L, p->k+i);
    lua_settable(L, -3);
  }
  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 = clvalue(func_at(L, 1))->l.p;
  while ((name = luaF_getlocalname(p, ++i, pc)) != 0)
    lua_pushstring(L, name);
  return i-1;
}

/* }====================================================== */




static int get_limits (lua_State *L) {
  lua_newtable(L);
  setnameval(L, "BITS_INT", BITS_INT);
  setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
  setnameval(L, "MAXVARS", MAXVARS);
  setnameval(L, "MAXPARAMS", MAXPARAMS);
  setnameval(L, "MAXSTACK", MAXSTACK);
  setnameval(L, "MAXUPVALUES", MAXUPVALUES);
  return 1;
}


static int mem_query (lua_State *L) {
  if (lua_isnone(L, 1)) {
    lua_pushintegral(L, memdebug_total);
    lua_pushintegral(L, memdebug_numblocks);
    lua_pushintegral(L, memdebug_maxmem);
    return 3;
  }
  else {
    memdebug_memlimit = luaL_checkint(L, 1);
    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_pushintegral(L, tsvalue(func_at(L, 1))->tsv.hash);
  }
  else {
    TObject *o = func_at(L, 1);
    Table *t;
    luaL_checktype(L, 2, LUA_TTABLE);
    t = hvalue(func_at(L, 2));
    lua_pushintegral(L, luaH_mainposition(t, o) - t->node);
  }
  return 1;
}


static int stacklevel (lua_State *L) {
  unsigned long a = 0;
  lua_pushintegral(L, (int)(L->top - L->stack));
  lua_pushintegral(L, (int)(L->stack_last - L->stack));
  lua_pushintegral(L, (int)(L->ci - L->base_ci));
  lua_pushintegral(L, (int)(L->end_ci - L->base_ci));
  lua_pushintegral(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(func_at(L, 1));
  if (i == -1) {
    lua_pushintegral(L, t->sizearray);
    lua_pushintegral(L, sizenode(t));
    lua_pushintegral(L, t->firstfree - t->node);
  }
  else if (i < t->sizearray) {
    lua_pushintegral(L, i);
    luaA_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)))) {
      luaA_pushobject(L, gkey(gnode(t, i)));
    }
    else
      lua_pushstring(L, "<undef>");
    luaA_pushobject(L, gval(gnode(t, i)));
    if (t->node[i].next)
      lua_pushintegral(L, t->node[i].next - 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_pushintegral(L ,tb->nuse);
    lua_pushintegral(L ,tb->size);
    return 2;
  }
  else if (s < tb->size) {
    GCObject *ts;
    int n = 0;
    for (ts = tb->hash[s]; ts; ts = ts->gch.next) {
      setsvalue2s(L->top, gcotots(ts));
      incr_top(L);
      n++;
    }
    return n;
  }
  return 0;
}


static int tref (lua_State *L) {
  int level = lua_gettop(L);
  int lock = luaL_optint(L, 2, 1);
  luaL_checkany(L, 1);
  lua_pushvalue(L, 1);
  lua_pushintegral(L, lua_ref(L, lock));
  assert(lua_gettop(L) == level+1);  /* +1 for result */
  return 1;
}

static int getref (lua_State *L) {
  int level = lua_gettop(L);
  lua_getref(L, luaL_checkint(L, 1));
  assert(lua_gettop(L) == level+1);
  return 1;
}

static int unref (lua_State *L) {
  int level = lua_gettop(L);
  lua_unref(L, luaL_checkint(L, 1));
  assert(lua_gettop(L) == level);
  return 0;
}

static int metatable (lua_State *L) {
  luaL_checkany(L, 1);
  if (lua_isnone(L, 2)) {
    if (lua_getmetatable(L, 1) == 0)
      lua_pushnil(L);
  }
  else {
    lua_settop(L, 2);
    luaL_checktype(L, 2, LUA_TTABLE);
    lua_setmetatable(L, 1);
  }
  return 1;
}


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 == 0) 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_checkint(L, 1)));
  return 1;
}


static int udataval (lua_State *L) {
  lua_pushintegral(L, cast(int, lua_touserdata(L, 1)));
  return 1;
}