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ldump.c
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ldump.c
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/*
** $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;
}