misc/liblua/ldump.c
author nemo
Mon, 08 Dec 2014 09:35:14 -0500
changeset 10634 35d059bd0932
parent 10017 de822cd3df3a
permissions -rw-r--r--
Use FreeAndNil across the board. Even if we are immediately assigning after, probably avoids accidental mistakes. Also free neglected owner tex on shutdown, and delete hog gears using the normal deletion procedure if for any reason they still exist (EndGame call?).

/*
** $Id: ldump.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $
** save precompiled Lua chunks
** See Copyright Notice in lua.h
*/

#include <stddef.h>

#define ldump_c
#define LUA_CORE

#include "lua.h"

#include "lobject.h"
#include "lstate.h"
#include "lundump.h"

typedef struct {
 lua_State* L;
 lua_Writer writer;
 void* data;
 int strip;
 int status;
} DumpState;

#define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D)
#define DumpVar(x,D)        DumpMem(&x,1,sizeof(x),D)

static void DumpBlock(const void* b, size_t size, DumpState* D)
{
 if (D->status==0)
 {
  lua_unlock(D->L);
  D->status=(*D->writer)(D->L,b,size,D->data);
  lua_lock(D->L);
 }
}

static void DumpChar(int y, DumpState* D)
{
 char x=(char)y;
 DumpVar(x,D);
}

static void DumpInt(int x, DumpState* D)
{
 DumpVar(x,D);
}

static void DumpNumber(lua_Number x, DumpState* D)
{
 DumpVar(x,D);
}

static void DumpVector(const void* b, int n, size_t size, DumpState* D)
{
 DumpInt(n,D);
 DumpMem(b,n,size,D);
}

static void DumpString(const TString* s, DumpState* D)
{
 if (s==NULL || getstr(s)==NULL)
 {
  size_t size=0;
  DumpVar(size,D);
 }
 else
 {
  size_t size=s->tsv.len+1;     /* include trailing '\0' */
  DumpVar(size,D);
  DumpBlock(getstr(s),size,D);
 }
}

#define DumpCode(f,D)    DumpVector(f->code,f->sizecode,sizeof(Instruction),D)

static void DumpFunction(const Proto* f, const TString* p, DumpState* D);

static void DumpConstants(const Proto* f, DumpState* D)
{
 int i,n=f->sizek;
 DumpInt(n,D);
 for (i=0; i<n; i++)
 {
  const TValue* o=&f->k[i];
  DumpChar(ttype(o),D);
  switch (ttype(o))
  {
   case LUA_TNIL:
    break;
   case LUA_TBOOLEAN:
    DumpChar(bvalue(o),D);
    break;
   case LUA_TNUMBER:
    DumpNumber(nvalue(o),D);
    break;
   case LUA_TSTRING:
    DumpString(rawtsvalue(o),D);
    break;
   default:
    lua_assert(0);          /* cannot happen */
    break;
  }
 }
 n=f->sizep;
 DumpInt(n,D);
 for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
}

static void DumpDebug(const Proto* f, DumpState* D)
{
 int i,n;
 n= (D->strip) ? 0 : f->sizelineinfo;
 DumpVector(f->lineinfo,n,sizeof(int),D);
 n= (D->strip) ? 0 : f->sizelocvars;
 DumpInt(n,D);
 for (i=0; i<n; i++)
 {
  DumpString(f->locvars[i].varname,D);
  DumpInt(f->locvars[i].startpc,D);
  DumpInt(f->locvars[i].endpc,D);
 }
 n= (D->strip) ? 0 : f->sizeupvalues;
 DumpInt(n,D);
 for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
}

static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
{
 DumpString((f->source==p || D->strip) ? NULL : f->source,D);
 DumpInt(f->linedefined,D);
 DumpInt(f->lastlinedefined,D);
 DumpChar(f->nups,D);
 DumpChar(f->numparams,D);
 DumpChar(f->is_vararg,D);
 DumpChar(f->maxstacksize,D);
 DumpCode(f,D);
 DumpConstants(f,D);
 DumpDebug(f,D);
}

static void DumpHeader(DumpState* D)
{
 char h[LUAC_HEADERSIZE];
 luaU_header(h);
 DumpBlock(h,LUAC_HEADERSIZE,D);
}

/*
** dump Lua function as precompiled chunk
*/
int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
{
 DumpState D;
 D.L=L;
 D.writer=w;
 D.data=data;
 D.strip=strip;
 D.status=0;
 DumpHeader(&D);
 DumpFunction(f,NULL,&D);
 return D.status;
}