lua/ldump.c
author Ryan C. Gordon <icculus@icculus.org>
Thu, 09 Apr 2020 02:15:46 -0400
changeset 60 a0629a9e3ee6
parent 0 d7ee4e2ed49d
permissions -rw-r--r--
otp: Some base32-decoding fixes to match what Google Authenticator expects.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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** $Id: ldump.c,v 2.17.1.1 2013/04/12 18:48:47 roberto Exp $
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** save precompiled Lua chunks
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** See Copyright Notice in lua.h
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*/
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#include <stddef.h>
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#define ldump_c
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#define LUA_CORE
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#include "lua.h"
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#include "lobject.h"
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#include "lstate.h"
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#include "lundump.h"
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typedef struct {
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 lua_State* L;
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 lua_Writer writer;
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 void* data;
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 int strip;
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 int status;
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} DumpState;
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#define DumpMem(b,n,size,D)	DumpBlock(b,(n)*(size),D)
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#define DumpVar(x,D)		DumpMem(&x,1,sizeof(x),D)
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static void DumpBlock(const void* b, size_t size, DumpState* D)
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{
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 if (D->status==0)
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 {
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  lua_unlock(D->L);
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  D->status=(*D->writer)(D->L,b,size,D->data);
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  lua_lock(D->L);
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 }
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}
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static void DumpChar(int y, DumpState* D)
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{
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 char x=(char)y;
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 DumpVar(x,D);
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}
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static void DumpInt(int x, DumpState* D)
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{
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 DumpVar(x,D);
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}
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static void DumpNumber(lua_Number x, DumpState* D)
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{
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 DumpVar(x,D);
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}
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static void DumpVector(const void* b, int n, size_t size, DumpState* D)
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{
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 DumpInt(n,D);
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 DumpMem(b,n,size,D);
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}
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static void DumpString(const TString* s, DumpState* D)
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{
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 if (s==NULL)
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 {
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  size_t size=0;
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  DumpVar(size,D);
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 }
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 else
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 {
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  size_t size=s->tsv.len+1;		/* include trailing '\0' */
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  DumpVar(size,D);
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  DumpBlock(getstr(s),size*sizeof(char),D);
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 }
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}
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#define DumpCode(f,D)	 DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
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static void DumpFunction(const Proto* f, DumpState* D);
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static void DumpConstants(const Proto* f, DumpState* D)
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{
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 int i,n=f->sizek;
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 DumpInt(n,D);
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 for (i=0; i<n; i++)
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 {
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  const TValue* o=&f->k[i];
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  DumpChar(ttypenv(o),D);
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  switch (ttypenv(o))
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  {
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   case LUA_TNIL:
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	break;
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   case LUA_TBOOLEAN:
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	DumpChar(bvalue(o),D);
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	break;
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   case LUA_TNUMBER:
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	DumpNumber(nvalue(o),D);
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	break;
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   case LUA_TSTRING:
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	DumpString(rawtsvalue(o),D);
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	break;
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    default: lua_assert(0);
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  }
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 }
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 n=f->sizep;
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 DumpInt(n,D);
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 for (i=0; i<n; i++) DumpFunction(f->p[i],D);
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}
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static void DumpUpvalues(const Proto* f, DumpState* D)
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{
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 int i,n=f->sizeupvalues;
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 DumpInt(n,D);
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 for (i=0; i<n; i++)
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 {
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  DumpChar(f->upvalues[i].instack,D);
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  DumpChar(f->upvalues[i].idx,D);
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 }
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}
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static void DumpDebug(const Proto* f, DumpState* D)
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{
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 int i,n;
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 DumpString((D->strip) ? NULL : f->source,D);
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 n= (D->strip) ? 0 : f->sizelineinfo;
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 DumpVector(f->lineinfo,n,sizeof(int),D);
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 n= (D->strip) ? 0 : f->sizelocvars;
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 DumpInt(n,D);
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 for (i=0; i<n; i++)
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 {
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  DumpString(f->locvars[i].varname,D);
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  DumpInt(f->locvars[i].startpc,D);
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  DumpInt(f->locvars[i].endpc,D);
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 }
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 n= (D->strip) ? 0 : f->sizeupvalues;
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 DumpInt(n,D);
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 for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
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}
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static void DumpFunction(const Proto* f, DumpState* D)
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{
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 DumpInt(f->linedefined,D);
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 DumpInt(f->lastlinedefined,D);
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 DumpChar(f->numparams,D);
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 DumpChar(f->is_vararg,D);
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 DumpChar(f->maxstacksize,D);
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 DumpCode(f,D);
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 DumpConstants(f,D);
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 DumpUpvalues(f,D);
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 DumpDebug(f,D);
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}
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static void DumpHeader(DumpState* D)
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{
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 lu_byte h[LUAC_HEADERSIZE];
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 luaU_header(h);
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 DumpBlock(h,LUAC_HEADERSIZE,D);
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}
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/*
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** dump Lua function as precompiled chunk
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*/
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int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
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{
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 DumpState D;
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 D.L=L;
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 D.writer=w;
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 D.data=data;
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 D.strip=strip;
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 D.status=0;
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 DumpHeader(&D);
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 DumpFunction(f,&D);
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 return D.status;
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}