rlm@1: /*
rlm@1: ** $Id: ldump.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $
rlm@1: ** save precompiled Lua chunks
rlm@1: ** See Copyright Notice in lua.h
rlm@1: */
rlm@1: 
rlm@1: #include <stddef.h>
rlm@1: 
rlm@1: #define ldump_c
rlm@1: #define LUA_CORE
rlm@1: 
rlm@1: #include "lua.h"
rlm@1: 
rlm@1: #include "lobject.h"
rlm@1: #include "lstate.h"
rlm@1: #include "lundump.h"
rlm@1: 
rlm@1: typedef struct {
rlm@1:  lua_State* L;
rlm@1:  lua_Writer writer;
rlm@1:  void* data;
rlm@1:  int strip;
rlm@1:  int status;
rlm@1: } DumpState;
rlm@1: 
rlm@1: #define DumpMem(b,n,size,D)	DumpBlock(b,(n)*(size),D)
rlm@1: #define DumpVar(x,D)	 	DumpMem(&x,1,sizeof(x),D)
rlm@1: 
rlm@1: static void DumpBlock(const void* b, size_t size, DumpState* D)
rlm@1: {
rlm@1:  if (D->status==0)
rlm@1:  {
rlm@1:   lua_unlock(D->L);
rlm@1:   D->status=(*D->writer)(D->L,b,size,D->data);
rlm@1:   lua_lock(D->L);
rlm@1:  }
rlm@1: }
rlm@1: 
rlm@1: static void DumpChar(int y, DumpState* D)
rlm@1: {
rlm@1:  char x=(char)y;
rlm@1:  DumpVar(x,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpInt(int x, DumpState* D)
rlm@1: {
rlm@1:  DumpVar(x,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpNumber(lua_Number x, DumpState* D)
rlm@1: {
rlm@1:  DumpVar(x,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpVector(const void* b, int n, size_t size, DumpState* D)
rlm@1: {
rlm@1:  DumpInt(n,D);
rlm@1:  DumpMem(b,n,size,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpString(const TString* s, DumpState* D)
rlm@1: {
rlm@1:  if (s==NULL || getstr(s)==NULL)
rlm@1:  {
rlm@1:   size_t size=0;
rlm@1:   DumpVar(size,D);
rlm@1:  }
rlm@1:  else
rlm@1:  {
rlm@1:   size_t size=s->tsv.len+1;		/* include trailing '\0' */
rlm@1:   DumpVar(size,D);
rlm@1:   DumpBlock(getstr(s),size,D);
rlm@1:  }
rlm@1: }
rlm@1: 
rlm@1: #define DumpCode(f,D)	 DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
rlm@1: 
rlm@1: static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
rlm@1: 
rlm@1: static void DumpConstants(const Proto* f, DumpState* D)
rlm@1: {
rlm@1:  int i,n=f->sizek;
rlm@1:  DumpInt(n,D);
rlm@1:  for (i=0; i<n; i++)
rlm@1:  {
rlm@1:   const TValue* o=&f->k[i];
rlm@1:   DumpChar(ttype(o),D);
rlm@1:   switch (ttype(o))
rlm@1:   {
rlm@1:    case LUA_TNIL:
rlm@1: 	break;
rlm@1:    case LUA_TBOOLEAN:
rlm@1: 	DumpChar(bvalue(o),D);
rlm@1: 	break;
rlm@1:    case LUA_TNUMBER:
rlm@1: 	DumpNumber(nvalue(o),D);
rlm@1: 	break;
rlm@1:    case LUA_TSTRING:
rlm@1: 	DumpString(rawtsvalue(o),D);
rlm@1: 	break;
rlm@1:    default:
rlm@1: 	lua_assert(0);			/* cannot happen */
rlm@1: 	break;
rlm@1:   }
rlm@1:  }
rlm@1:  n=f->sizep;
rlm@1:  DumpInt(n,D);
rlm@1:  for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpDebug(const Proto* f, DumpState* D)
rlm@1: {
rlm@1:  int i,n;
rlm@1:  n= (D->strip) ? 0 : f->sizelineinfo;
rlm@1:  DumpVector(f->lineinfo,n,sizeof(int),D);
rlm@1:  n= (D->strip) ? 0 : f->sizelocvars;
rlm@1:  DumpInt(n,D);
rlm@1:  for (i=0; i<n; i++)
rlm@1:  {
rlm@1:   DumpString(f->locvars[i].varname,D);
rlm@1:   DumpInt(f->locvars[i].startpc,D);
rlm@1:   DumpInt(f->locvars[i].endpc,D);
rlm@1:  }
rlm@1:  n= (D->strip) ? 0 : f->sizeupvalues;
rlm@1:  DumpInt(n,D);
rlm@1:  for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
rlm@1: {
rlm@1:  DumpString((f->source==p || D->strip) ? NULL : f->source,D);
rlm@1:  DumpInt(f->linedefined,D);
rlm@1:  DumpInt(f->lastlinedefined,D);
rlm@1:  DumpChar(f->nups,D);
rlm@1:  DumpChar(f->numparams,D);
rlm@1:  DumpChar(f->is_vararg,D);
rlm@1:  DumpChar(f->maxstacksize,D);
rlm@1:  DumpCode(f,D);
rlm@1:  DumpConstants(f,D);
rlm@1:  DumpDebug(f,D);
rlm@1: }
rlm@1: 
rlm@1: static void DumpHeader(DumpState* D)
rlm@1: {
rlm@1:  char h[LUAC_HEADERSIZE];
rlm@1:  luaU_header(h);
rlm@1:  DumpBlock(h,LUAC_HEADERSIZE,D);
rlm@1: }
rlm@1: 
rlm@1: /*
rlm@1: ** dump Lua function as precompiled chunk
rlm@1: */
rlm@1: int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
rlm@1: {
rlm@1:  DumpState D;
rlm@1:  D.L=L;
rlm@1:  D.writer=w;
rlm@1:  D.data=data;
rlm@1:  D.strip=strip;
rlm@1:  D.status=0;
rlm@1:  DumpHeader(&D);
rlm@1:  DumpFunction(f,NULL,&D);
rlm@1:  return D.status;
rlm@1: }