mirror of
https://gitcode.com/JianFeeeee/LuaCangjia_api.git
synced 2026-09-20 08:58:13 +00:00
vendor: 引入 Lua 5.0.3 官方源码 (lua_5.0 分支)
桥接层适配尚未完成。Lua 5.0 与 5.1+ 差异显著: - 无 linit.c/loslib.c(luaopen_os 混于 liolib.c) - 无 luaL_setfuncs/lua_getextraspace/lua_isinteger - 无 LUA_REGISTRYINDEX 现代用法差异需逐一核对 后续移植需按 ADAPTATION.md 指引重写 I/O 重定向与 typed interop 层
This commit is contained in:
JianFeeeee
@ -1,421 +1,286 @@
|
||||
/*
|
||||
** $Id: lundump.c $
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||||
** load precompiled Lua chunks
|
||||
** $Id: lundump.c,v 1.49 2003/04/07 20:34:20 lhf Exp $
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||||
** load pre-compiled Lua chunks
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
#define lundump_c
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#define LUA_CORE
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||||
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#include "lprefix.h"
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||||
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||||
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||||
#include <limits.h>
|
||||
#include <string.h>
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||||
|
||||
#include "lua.h"
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||||
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||||
#include "ldebug.h"
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||||
#include "ldo.h"
|
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#include "lfunc.h"
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||||
#include "lmem.h"
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||||
#include "lobject.h"
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#include "lopcodes.h"
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#include "lstring.h"
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#include "ltable.h"
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#include "lundump.h"
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#include "lzio.h"
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#if !defined(luai_verifycode)
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#define luai_verifycode(L,f) /* empty */
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#endif
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||||
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#define LoadByte (lu_byte) ezgetc
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||||
|
||||
typedef struct {
|
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lua_State *L;
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||||
ZIO *Z;
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const char *name;
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Table *h; /* list for string reuse */
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size_t offset; /* current position relative to beginning of dump */
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lua_Unsigned nstr; /* number of strings in the list */
|
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lu_byte fixed; /* dump is fixed in memory */
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lua_State* L;
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ZIO* Z;
|
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Mbuffer* b;
|
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int swap;
|
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const char* name;
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} LoadState;
|
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|
||||
|
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static l_noret error (LoadState *S, const char *why) {
|
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luaO_pushfstring(S->L, "%s: bad binary format (%s)", S->name, why);
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luaD_throw(S->L, LUA_ERRSYNTAX);
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static void unexpectedEOZ (LoadState* S)
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{
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luaG_runerror(S->L,"unexpected end of file in %s",S->name);
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}
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|
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static int ezgetc (LoadState* S)
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{
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int c=zgetc(S->Z);
|
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if (c==EOZ) unexpectedEOZ(S);
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return c;
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}
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|
||||
static void ezread (LoadState* S, void* b, int n)
|
||||
{
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int r=luaZ_read(S->Z,b,n);
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if (r!=0) unexpectedEOZ(S);
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}
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||||
|
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static void LoadBlock (LoadState* S, void* b, size_t size)
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{
|
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if (S->swap)
|
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{
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char* p=(char*) b+size-1;
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int n=size;
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while (n--) *p--=(char)ezgetc(S);
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}
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else
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ezread(S,b,size);
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}
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|
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static void LoadVector (LoadState* S, void* b, int m, size_t size)
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{
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if (S->swap)
|
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{
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char* q=(char*) b;
|
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while (m--)
|
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{
|
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char* p=q+size-1;
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int n=size;
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while (n--) *p--=(char)ezgetc(S);
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q+=size;
|
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}
|
||||
}
|
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else
|
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ezread(S,b,m*size);
|
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}
|
||||
|
||||
static int LoadInt (LoadState* S)
|
||||
{
|
||||
int x;
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LoadBlock(S,&x,sizeof(x));
|
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if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);
|
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return x;
|
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}
|
||||
|
||||
static size_t LoadSize (LoadState* S)
|
||||
{
|
||||
size_t x;
|
||||
LoadBlock(S,&x,sizeof(x));
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return x;
|
||||
}
|
||||
|
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static lua_Number LoadNumber (LoadState* S)
|
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{
|
||||
lua_Number x;
|
||||
LoadBlock(S,&x,sizeof(x));
|
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return x;
|
||||
}
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||||
|
||||
static TString* LoadString (LoadState* S)
|
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{
|
||||
size_t size=LoadSize(S);
|
||||
if (size==0)
|
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return NULL;
|
||||
else
|
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{
|
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char* s=luaZ_openspace(S->L,S->b,size);
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ezread(S,s,size);
|
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return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
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}
|
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}
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|
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static void LoadCode (LoadState* S, Proto* f)
|
||||
{
|
||||
int size=LoadInt(S);
|
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f->code=luaM_newvector(S->L,size,Instruction);
|
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f->sizecode=size;
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||||
LoadVector(S,f->code,size,sizeof(*f->code));
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}
|
||||
|
||||
static void LoadLocals (LoadState* S, Proto* f)
|
||||
{
|
||||
int i,n;
|
||||
n=LoadInt(S);
|
||||
f->locvars=luaM_newvector(S->L,n,LocVar);
|
||||
f->sizelocvars=n;
|
||||
for (i=0; i<n; i++)
|
||||
{
|
||||
f->locvars[i].varname=LoadString(S);
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f->locvars[i].startpc=LoadInt(S);
|
||||
f->locvars[i].endpc=LoadInt(S);
|
||||
}
|
||||
}
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||||
|
||||
static void LoadLines (LoadState* S, Proto* f)
|
||||
{
|
||||
int size=LoadInt(S);
|
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f->lineinfo=luaM_newvector(S->L,size,int);
|
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f->sizelineinfo=size;
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LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));
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}
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|
||||
static void LoadUpvalues (LoadState* S, Proto* f)
|
||||
{
|
||||
int i,n;
|
||||
n=LoadInt(S);
|
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if (n!=0 && n!=f->nups)
|
||||
luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",
|
||||
S->name,n,f->nups);
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f->upvalues=luaM_newvector(S->L,n,TString*);
|
||||
f->sizeupvalues=n;
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for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
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||||
}
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||||
|
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static Proto* LoadFunction (LoadState* S, TString* p);
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|
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static void LoadConstants (LoadState* S, Proto* f)
|
||||
{
|
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int i,n;
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n=LoadInt(S);
|
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f->k=luaM_newvector(S->L,n,TObject);
|
||||
f->sizek=n;
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for (i=0; i<n; i++)
|
||||
{
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||||
TObject* o=&f->k[i];
|
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int t=LoadByte(S);
|
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switch (t)
|
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{
|
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case LUA_TNUMBER:
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setnvalue(o,LoadNumber(S));
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break;
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||||
case LUA_TSTRING:
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setsvalue2n(o,LoadString(S));
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break;
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case LUA_TNIL:
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setnilvalue(o);
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break;
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||||
default:
|
||||
luaG_runerror(S->L,"bad constant type (%d) in %s",t,S->name);
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||||
break;
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||||
}
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||||
}
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||||
n=LoadInt(S);
|
||||
f->p=luaM_newvector(S->L,n,Proto*);
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f->sizep=n;
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for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
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||||
}
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||||
|
||||
static Proto* LoadFunction (LoadState* S, TString* p)
|
||||
{
|
||||
Proto* f=luaF_newproto(S->L);
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||||
f->source=LoadString(S); if (f->source==NULL) f->source=p;
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||||
f->lineDefined=LoadInt(S);
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||||
f->nups=LoadByte(S);
|
||||
f->numparams=LoadByte(S);
|
||||
f->is_vararg=LoadByte(S);
|
||||
f->maxstacksize=LoadByte(S);
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LoadLines(S,f);
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LoadLocals(S,f);
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LoadUpvalues(S,f);
|
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LoadConstants(S,f);
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LoadCode(S,f);
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#ifndef TRUST_BINARIES
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if (!luaG_checkcode(f)) luaG_runerror(S->L,"bad code in %s",S->name);
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||||
#endif
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||||
return f;
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||||
}
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||||
|
||||
static void LoadSignature (LoadState* S)
|
||||
{
|
||||
const char* s=LUA_SIGNATURE;
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||||
while (*s!=0 && ezgetc(S)==*s)
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++s;
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if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);
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||||
}
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||||
|
||||
static void TestSize (LoadState* S, int s, const char* what)
|
||||
{
|
||||
int r=LoadByte(S);
|
||||
if (r!=s)
|
||||
luaG_runerror(S->L,"virtual machine mismatch in %s: "
|
||||
"size of %s is %d but read %d",S->name,what,s,r);
|
||||
}
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||||
|
||||
#define TESTSIZE(s,w) TestSize(S,s,w)
|
||||
#define V(v) v/16,v%16
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||||
|
||||
static void LoadHeader (LoadState* S)
|
||||
{
|
||||
int version;
|
||||
lua_Number x,tx=TEST_NUMBER;
|
||||
LoadSignature(S);
|
||||
version=LoadByte(S);
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if (version>VERSION)
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||||
luaG_runerror(S->L,"%s too new: "
|
||||
"read version %d.%d; expected at most %d.%d",
|
||||
S->name,V(version),V(VERSION));
|
||||
if (version<VERSION0) /* check last major change */
|
||||
luaG_runerror(S->L,"%s too old: "
|
||||
"read version %d.%d; expected at least %d.%d",
|
||||
S->name,V(version),V(VERSION0));
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||||
S->swap=(luaU_endianness()!=LoadByte(S)); /* need to swap bytes? */
|
||||
TESTSIZE(sizeof(int),"int");
|
||||
TESTSIZE(sizeof(size_t), "size_t");
|
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TESTSIZE(sizeof(Instruction), "Instruction");
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||||
TESTSIZE(SIZE_OP, "OP");
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||||
TESTSIZE(SIZE_A, "A");
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||||
TESTSIZE(SIZE_B, "B");
|
||||
TESTSIZE(SIZE_C, "C");
|
||||
TESTSIZE(sizeof(lua_Number), "number");
|
||||
x=LoadNumber(S);
|
||||
if ((long)x!=(long)tx) /* disregard errors in last bits of fraction */
|
||||
luaG_runerror(S->L,"unknown number format in %s",S->name);
|
||||
}
|
||||
|
||||
static Proto* LoadChunk (LoadState* S)
|
||||
{
|
||||
LoadHeader(S);
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||||
return LoadFunction(S,NULL);
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||||
}
|
||||
|
||||
/*
|
||||
** All high-level loads go through loadVector; you can change it to
|
||||
** adapt to the endianness of the input
|
||||
** load precompiled chunk
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||||
*/
|
||||
#define loadVector(S,b,n) loadBlock(S,b,cast_sizet(n)*sizeof((b)[0]))
|
||||
|
||||
static void loadBlock (LoadState *S, void *b, size_t size) {
|
||||
if (luaZ_read(S->Z, b, size) != 0)
|
||||
error(S, "truncated chunk");
|
||||
S->offset += size;
|
||||
Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff)
|
||||
{
|
||||
LoadState S;
|
||||
const char* s=zname(Z);
|
||||
if (*s=='@' || *s=='=')
|
||||
S.name=s+1;
|
||||
else if (*s==LUA_SIGNATURE[0])
|
||||
S.name="binary string";
|
||||
else
|
||||
S.name=s;
|
||||
S.L=L;
|
||||
S.Z=Z;
|
||||
S.b=buff;
|
||||
return LoadChunk(&S);
|
||||
}
|
||||
|
||||
|
||||
static void loadAlign (LoadState *S, unsigned align) {
|
||||
unsigned padding = align - cast_uint(S->offset % align);
|
||||
if (padding < align) { /* (padding == align) means no padding */
|
||||
lua_Integer paddingContent;
|
||||
loadBlock(S, &paddingContent, padding);
|
||||
lua_assert(S->offset % align == 0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#define getaddr(S,n,t) cast(t *, getaddr_(S,cast_sizet(n) * sizeof(t)))
|
||||
|
||||
static const void *getaddr_ (LoadState *S, size_t size) {
|
||||
const void *block = luaZ_getaddr(S->Z, size);
|
||||
S->offset += size;
|
||||
if (block == NULL)
|
||||
error(S, "truncated fixed buffer");
|
||||
return block;
|
||||
}
|
||||
|
||||
|
||||
#define loadVar(S,x) loadVector(S,&x,1)
|
||||
|
||||
|
||||
static lu_byte loadByte (LoadState *S) {
|
||||
int b = zgetc(S->Z);
|
||||
if (b == EOZ)
|
||||
error(S, "truncated chunk");
|
||||
S->offset++;
|
||||
return cast_byte(b);
|
||||
}
|
||||
|
||||
|
||||
static lua_Unsigned loadVarint (LoadState *S, lua_Unsigned limit) {
|
||||
lua_Unsigned x = 0;
|
||||
int b;
|
||||
limit >>= 7;
|
||||
do {
|
||||
b = loadByte(S);
|
||||
if (x > limit)
|
||||
error(S, "integer overflow");
|
||||
x = (x << 7) | (b & 0x7f);
|
||||
} while ((b & 0x80) != 0);
|
||||
return x;
|
||||
}
|
||||
|
||||
|
||||
static size_t loadSize (LoadState *S) {
|
||||
return cast_sizet(loadVarint(S, MAX_SIZE));
|
||||
}
|
||||
|
||||
|
||||
static int loadInt (LoadState *S) {
|
||||
return cast_int(loadVarint(S, cast_sizet(INT_MAX)));
|
||||
}
|
||||
|
||||
|
||||
|
||||
static lua_Number loadNumber (LoadState *S) {
|
||||
lua_Number x;
|
||||
loadVar(S, x);
|
||||
return x;
|
||||
}
|
||||
|
||||
|
||||
static lua_Integer loadInteger (LoadState *S) {
|
||||
lua_Unsigned cx = loadVarint(S, LUA_MAXUNSIGNED);
|
||||
/* decode unsigned to signed */
|
||||
if ((cx & 1) != 0)
|
||||
return l_castU2S(~(cx >> 1));
|
||||
else
|
||||
return l_castU2S(cx >> 1);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Load a nullable string into slot 'sl' from prototype 'p'. The
|
||||
** assignment to the slot and the barrier must be performed before any
|
||||
** possible GC activity, to anchor the string. (Both 'loadVector' and
|
||||
** 'luaH_setint' can call the GC.)
|
||||
** find byte order
|
||||
*/
|
||||
static void loadString (LoadState *S, Proto *p, TString **sl) {
|
||||
lua_State *L = S->L;
|
||||
TString *ts;
|
||||
TValue sv;
|
||||
size_t size = loadSize(S);
|
||||
if (size == 0) { /* previously saved string? */
|
||||
lua_Unsigned idx = loadVarint(S, LUA_MAXUNSIGNED); /* get its index */
|
||||
TValue stv;
|
||||
if (idx == 0) { /* no string? */
|
||||
lua_assert(*sl == NULL); /* must be prefilled */
|
||||
return;
|
||||
}
|
||||
if (novariant(luaH_getint(S->h, l_castU2S(idx), &stv)) != LUA_TSTRING)
|
||||
error(S, "invalid string index");
|
||||
*sl = ts = tsvalue(&stv); /* get its value */
|
||||
luaC_objbarrier(L, p, ts);
|
||||
return; /* do not save it again */
|
||||
}
|
||||
else if ((size -= 1) <= LUAI_MAXSHORTLEN) { /* short string? */
|
||||
char buff[LUAI_MAXSHORTLEN + 1]; /* extra space for '\0' */
|
||||
loadVector(S, buff, size + 1); /* load string into buffer */
|
||||
*sl = ts = luaS_newlstr(L, buff, size); /* create string */
|
||||
luaC_objbarrier(L, p, ts);
|
||||
}
|
||||
else if (S->fixed) { /* for a fixed buffer, use a fixed string */
|
||||
const char *s = getaddr(S, size + 1, char); /* get content address */
|
||||
*sl = ts = luaS_newextlstr(L, s, size, NULL, NULL);
|
||||
luaC_objbarrier(L, p, ts);
|
||||
}
|
||||
else { /* create internal copy */
|
||||
*sl = ts = luaS_createlngstrobj(L, size); /* create string */
|
||||
luaC_objbarrier(L, p, ts);
|
||||
loadVector(S, getlngstr(ts), size + 1); /* load directly in final place */
|
||||
}
|
||||
/* add string to list of saved strings */
|
||||
S->nstr++;
|
||||
setsvalue(L, &sv, ts);
|
||||
luaH_setint(L, S->h, l_castU2S(S->nstr), &sv);
|
||||
luaC_objbarrierback(L, obj2gco(S->h), ts);
|
||||
int luaU_endianness (void)
|
||||
{
|
||||
int x=1;
|
||||
return *(char*)&x;
|
||||
}
|
||||
|
||||
|
||||
static void loadCode (LoadState *S, Proto *f) {
|
||||
int n = loadInt(S);
|
||||
loadAlign(S, sizeof(f->code[0]));
|
||||
if (S->fixed) {
|
||||
f->code = getaddr(S, n, Instruction);
|
||||
f->sizecode = n;
|
||||
}
|
||||
else {
|
||||
f->code = luaM_newvectorchecked(S->L, n, Instruction);
|
||||
f->sizecode = n;
|
||||
loadVector(S, f->code, n);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void loadFunction(LoadState *S, Proto *f);
|
||||
|
||||
|
||||
static void loadConstants (LoadState *S, Proto *f) {
|
||||
int i;
|
||||
int n = loadInt(S);
|
||||
f->k = luaM_newvectorchecked(S->L, n, TValue);
|
||||
f->sizek = n;
|
||||
for (i = 0; i < n; i++)
|
||||
setnilvalue(&f->k[i]);
|
||||
for (i = 0; i < n; i++) {
|
||||
TValue *o = &f->k[i];
|
||||
int t = loadByte(S);
|
||||
switch (t) {
|
||||
case LUA_VNIL:
|
||||
setnilvalue(o);
|
||||
break;
|
||||
case LUA_VFALSE:
|
||||
setbfvalue(o);
|
||||
break;
|
||||
case LUA_VTRUE:
|
||||
setbtvalue(o);
|
||||
break;
|
||||
case LUA_VNUMFLT:
|
||||
setfltvalue(o, loadNumber(S));
|
||||
break;
|
||||
case LUA_VNUMINT:
|
||||
setivalue(o, loadInteger(S));
|
||||
break;
|
||||
case LUA_VSHRSTR:
|
||||
case LUA_VLNGSTR: {
|
||||
lua_assert(f->source == NULL);
|
||||
loadString(S, f, &f->source); /* use 'source' to anchor string */
|
||||
if (f->source == NULL)
|
||||
error(S, "bad format for constant string");
|
||||
setsvalue2n(S->L, o, f->source); /* save it in the right place */
|
||||
f->source = NULL;
|
||||
break;
|
||||
}
|
||||
default: error(S, "invalid constant");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void loadProtos (LoadState *S, Proto *f) {
|
||||
int i;
|
||||
int n = loadInt(S);
|
||||
f->p = luaM_newvectorchecked(S->L, n, Proto *);
|
||||
f->sizep = n;
|
||||
for (i = 0; i < n; i++)
|
||||
f->p[i] = NULL;
|
||||
for (i = 0; i < n; i++) {
|
||||
f->p[i] = luaF_newproto(S->L);
|
||||
luaC_objbarrier(S->L, f, f->p[i]);
|
||||
loadFunction(S, f->p[i]);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Load the upvalues for a function. The names must be filled first,
|
||||
** because the filling of the other fields can raise read errors and
|
||||
** the creation of the error message can call an emergency collection;
|
||||
** in that case all prototypes must be consistent for the GC.
|
||||
*/
|
||||
static void loadUpvalues (LoadState *S, Proto *f) {
|
||||
int i;
|
||||
int n = loadInt(S);
|
||||
f->upvalues = luaM_newvectorchecked(S->L, n, Upvaldesc);
|
||||
f->sizeupvalues = n;
|
||||
for (i = 0; i < n; i++) /* make array valid for GC */
|
||||
f->upvalues[i].name = NULL;
|
||||
for (i = 0; i < n; i++) { /* following calls can raise errors */
|
||||
f->upvalues[i].instack = loadByte(S);
|
||||
f->upvalues[i].idx = loadByte(S);
|
||||
f->upvalues[i].kind = loadByte(S);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void loadDebug (LoadState *S, Proto *f) {
|
||||
int i;
|
||||
int n = loadInt(S);
|
||||
if (S->fixed) {
|
||||
f->lineinfo = getaddr(S, n, ls_byte);
|
||||
f->sizelineinfo = n;
|
||||
}
|
||||
else {
|
||||
f->lineinfo = luaM_newvectorchecked(S->L, n, ls_byte);
|
||||
f->sizelineinfo = n;
|
||||
loadVector(S, f->lineinfo, n);
|
||||
}
|
||||
n = loadInt(S);
|
||||
if (n > 0) {
|
||||
loadAlign(S, sizeof(int));
|
||||
if (S->fixed) {
|
||||
f->abslineinfo = getaddr(S, n, AbsLineInfo);
|
||||
f->sizeabslineinfo = n;
|
||||
}
|
||||
else {
|
||||
f->abslineinfo = luaM_newvectorchecked(S->L, n, AbsLineInfo);
|
||||
f->sizeabslineinfo = n;
|
||||
loadVector(S, f->abslineinfo, n);
|
||||
}
|
||||
}
|
||||
n = loadInt(S);
|
||||
f->locvars = luaM_newvectorchecked(S->L, n, LocVar);
|
||||
f->sizelocvars = n;
|
||||
for (i = 0; i < n; i++)
|
||||
f->locvars[i].varname = NULL;
|
||||
for (i = 0; i < n; i++) {
|
||||
loadString(S, f, &f->locvars[i].varname);
|
||||
f->locvars[i].startpc = loadInt(S);
|
||||
f->locvars[i].endpc = loadInt(S);
|
||||
}
|
||||
n = loadInt(S);
|
||||
if (n != 0) /* does it have debug information? */
|
||||
n = f->sizeupvalues; /* must be this many */
|
||||
for (i = 0; i < n; i++)
|
||||
loadString(S, f, &f->upvalues[i].name);
|
||||
}
|
||||
|
||||
|
||||
static void loadFunction (LoadState *S, Proto *f) {
|
||||
f->linedefined = loadInt(S);
|
||||
f->lastlinedefined = loadInt(S);
|
||||
f->numparams = loadByte(S);
|
||||
/* get only the meaningful flags */
|
||||
f->flag = cast_byte(loadByte(S) & ~PF_FIXED);
|
||||
if (S->fixed)
|
||||
f->flag |= PF_FIXED; /* signal that code is fixed */
|
||||
f->maxstacksize = loadByte(S);
|
||||
loadCode(S, f);
|
||||
loadConstants(S, f);
|
||||
loadUpvalues(S, f);
|
||||
loadProtos(S, f);
|
||||
loadString(S, f, &f->source);
|
||||
loadDebug(S, f);
|
||||
}
|
||||
|
||||
|
||||
static void checkliteral (LoadState *S, const char *s, const char *msg) {
|
||||
char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
|
||||
size_t len = strlen(s);
|
||||
loadVector(S, buff, len);
|
||||
if (memcmp(s, buff, len) != 0)
|
||||
error(S, msg);
|
||||
}
|
||||
|
||||
|
||||
static l_noret numerror (LoadState *S, const char *what, const char *tname) {
|
||||
const char *msg = luaO_pushfstring(S->L, "%s %s mismatch", tname, what);
|
||||
error(S, msg);
|
||||
}
|
||||
|
||||
|
||||
static void checknumsize (LoadState *S, int size, const char *tname) {
|
||||
if (size != loadByte(S))
|
||||
numerror(S, "size", tname);
|
||||
}
|
||||
|
||||
|
||||
static void checknumformat (LoadState *S, int eq, const char *tname) {
|
||||
if (!eq)
|
||||
numerror(S, "format", tname);
|
||||
}
|
||||
|
||||
|
||||
#define checknum(S,tvar,value,tname) \
|
||||
{ tvar i; checknumsize(S, sizeof(i), tname); \
|
||||
loadVar(S, i); \
|
||||
checknumformat(S, i == value, tname); }
|
||||
|
||||
|
||||
static void checkHeader (LoadState *S) {
|
||||
/* skip 1st char (already read and checked) */
|
||||
checkliteral(S, &LUA_SIGNATURE[1], "not a binary chunk");
|
||||
if (loadByte(S) != LUAC_VERSION)
|
||||
error(S, "version mismatch");
|
||||
if (loadByte(S) != LUAC_FORMAT)
|
||||
error(S, "format mismatch");
|
||||
checkliteral(S, LUAC_DATA, "corrupted chunk");
|
||||
checknum(S, int, LUAC_INT, "int");
|
||||
checknum(S, Instruction, LUAC_INST, "instruction");
|
||||
checknum(S, lua_Integer, LUAC_INT, "Lua integer");
|
||||
checknum(S, lua_Number, LUAC_NUM, "Lua number");
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
** Load precompiled chunk.
|
||||
*/
|
||||
LClosure *luaU_undump (lua_State *L, ZIO *Z, Table *anchor, const char *name,
|
||||
int fixed) {
|
||||
LoadState S;
|
||||
LClosure *cl;
|
||||
if (*name == '@' || *name == '=')
|
||||
name = name + 1;
|
||||
else if (*name == LUA_SIGNATURE[0])
|
||||
name = "binary string";
|
||||
S.name = name;
|
||||
S.L = L;
|
||||
S.Z = Z;
|
||||
S.fixed = cast_byte(fixed);
|
||||
S.offset = 1; /* fist byte was already read */
|
||||
checkHeader(&S);
|
||||
S.h = anchor;
|
||||
S.nstr = 0;
|
||||
cl = luaF_newLclosure(L, loadByte(&S));
|
||||
luaD_anchorobj(L, anchor, obj2gco(cl));
|
||||
cl->p = luaF_newproto(L);
|
||||
luaC_objbarrier(L, cl, cl->p);
|
||||
loadFunction(&S, cl->p);
|
||||
if (cl->nupvalues != cl->p->sizeupvalues)
|
||||
error(&S, "corrupted chunk");
|
||||
luai_verifycode(L, cl->p);
|
||||
return cl;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user