/*** $Id: lundump.c,v 2.41 2014/11/02 19:19:04 roberto Exp $** load precompiled Lua chunks** See Copyright Notice in lua.h*/ #define lundump_c#define LUA_CORE #include "lprefix.h" #include <string.h> #include "lua.h" #include "ldebug.h"#include "ldo.h"#include "lfunc.h"#include "lmem.h"#include "lobject.h"#include "lstring.h"#include "lundump.h"#include "lzio.h" #if !defined(luai_verifycode)#define luai_verifycode(L,b,f) /* empty */#endif typedef struct { lua_State *L; ZIO *Z; Mbuffer *b; const char *name;} LoadState; static l_noret error(LoadState *S, const char *why) { luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why); luaD_throw(S->L, LUA_ERRSYNTAX);} /*** All high-level loads go through LoadVector; you can change it to** adapt to the endianness of the input*/#define LoadVector(S,b,n) LoadBlock(S,b,(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");} #define LoadVar(S,x) LoadVector(S,&x,1) static lu_byte LoadByte (LoadState *S) { lu_byte x; LoadVar(S, x); return x;} static int LoadInt (LoadState *S) { int x; LoadVar(S, x); return x;} static lua_Number LoadNumber (LoadState *S) { lua_Number x; LoadVar(S, x); return x;} static lua_Integer LoadInteger (LoadState *S) { lua_Integer x; LoadVar(S, x); return x;} static TString *LoadString (LoadState *S) { size_t size = LoadByte(S); if (size == 0xFF) LoadVar(S, size); if (size == 0) return NULL; else { char *s = luaZ_openspace(S->L, S->b, --size); LoadVector(S, s, size); return luaS_newlstr(S->L, s, size); }} static void LoadCode (LoadState *S, Proto *f) { int n = LoadInt(S); f->code = luaM_newvector(S->L, n, Instruction); f->sizecode = n; LoadVector(S, f->code, n);} static void LoadFunction(LoadState *S, Proto *f, TString *psource); static void LoadConstants (LoadState *S, Proto *f) { int i; int n = LoadInt(S); f->k = luaM_newvector(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_TNIL: setnilvalue(o); break; case LUA_TBOOLEAN: setbvalue(o, LoadByte(S)); break; case LUA_TNUMFLT: setfltvalue(o, LoadNumber(S)); break; case LUA_TNUMINT: setivalue(o, LoadInteger(S)); break; case LUA_TSHRSTR: case LUA_TLNGSTR: setsvalue2n(S->L, o, LoadString(S)); break; default: lua_assert(0); } }} static void LoadProtos (LoadState *S, Proto *f) { int i; int n = LoadInt(S); f->p = luaM_newvector(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); LoadFunction(S, f->p[i], f->source); }} static void LoadUpvalues (LoadState *S, Proto *f) { int i, n; n = LoadInt(S); f->upvalues = luaM_newvector(S->L, n, Upvaldesc); f->sizeupvalues = n; for (i = 0; i < n; i++) f->upvalues[i].name = NULL; for (i = 0; i < n; i++) { f->upvalues[i].instack = LoadByte(S); f->upvalues[i].idx = LoadByte(S); }} static void LoadDebug (LoadState *S, Proto *f) { int i, n; n = LoadInt(S); f->lineinfo = luaM_newvector(S->L, n, int); f->sizelineinfo = n; LoadVector(S, f->lineinfo, 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 = NULL; for (i = 0; i < n; i++) { f->locvars[i].varname = LoadString(S); f->locvars[i].startpc = LoadInt(S); f->locvars[i].endpc = LoadInt(S); } n = LoadInt(S); for (i = 0; i < n; i++) f->upvalues[i].name = LoadString(S);} static void LoadFunction (LoadState *S, Proto *f, TString *psource) { f->source = LoadString(S); if (f->source == NULL) /* no source in dump? */ f->source = psource; /* reuse parent's source */ f->linedefined = LoadInt(S); f->lastlinedefined = LoadInt(S); f->numparams = LoadByte(S); f->is_vararg = LoadByte(S); f->maxstacksize = LoadByte(S); LoadCode(S, f); LoadConstants(S, f); LoadUpvalues(S, f); LoadProtos(S, f); 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 void fchecksize (LoadState *S, size_t size, const char *tname) { if (LoadByte(S) != size) error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));} #define checksize(S,t) fchecksize(S,sizeof(t),#t) static void checkHeader (LoadState *S) { checkliteral(S, LUA_SIGNATURE + 1, "not a"); /* 1st char already checked */ if (LoadByte(S) != LUAC_VERSION) error(S, "version mismatch in"); if (LoadByte(S) != LUAC_FORMAT) error(S, "format mismatch in"); checkliteral(S, LUAC_DATA, "corrupted"); checksize(S, int); checksize(S, size_t); checksize(S, Instruction); checksize(S, lua_Integer); checksize(S, lua_Number); if (LoadInteger(S) != LUAC_INT) error(S, "endianness mismatch in"); if (LoadNumber(S) != LUAC_NUM) error(S, "float format mismatch in");} /*** load precompiled chunk*/LClosure *luaU_undump(lua_State *L, ZIO *Z, Mbuffer *buff, const char *name) { LoadState S; LClosure *cl; if (*name == '@' || *name == '=') S.name = name + 1; else if (*name == LUA_SIGNATURE[0]) S.name = "binary string"; else S.name = name; S.L = L; S.Z = Z; S.b = buff; checkHeader(&S); cl = luaF_newLclosure(L, LoadByte(&S)); setclLvalue(L, L->top, cl); incr_top(L); cl->p = luaF_newproto(L); LoadFunction(&S, cl->p, NULL); lua_assert(cl->nupvalues == cl->p->sizeupvalues); luai_verifycode(L, buff, cl->p); return cl;}
/*
** $Id: lundump.c,v 2.41 2014/11/02 19:19:04 roberto Exp $
** load precompiled Lua chunks
** See Copyright Notice in lua.h
*/
#define lundump_c
#define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstring.h"
#include "lundump.h"
#include "lzio.h"
#if !defined(luai_verifycode)
#define luai_verifycode(L,b,f) /* empty */
#endif
typedef struct {
lua_State *L;
ZIO *Z;
Mbuffer *b;
const char *name;
} LoadState;
static l_noret error(LoadState *S, const char *why) {
luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why);
luaD_throw(S->L, LUA_ERRSYNTAX);
}
/*
** All high-level loads go through LoadVector; you can change it to
** adapt to the endianness of the input
*/
#define LoadVector(S,b,n) LoadBlock(S,b,(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");
}
#define LoadVar(S,x) LoadVector(S,&x,1)
static lu_byte LoadByte (LoadState *S) {
lu_byte x;
LoadVar(S, x);
return x;
}
static int LoadInt (LoadState *S) {
int x;
LoadVar(S, x);
return x;
}
static lua_Number LoadNumber (LoadState *S) {
lua_Number x;
LoadVar(S, x);
return x;
}
static lua_Integer LoadInteger (LoadState *S) {
lua_Integer x;
LoadVar(S, x);
return x;
}
static TString *LoadString (LoadState *S) {
size_t size = LoadByte(S);
if (size == 0xFF)
LoadVar(S, size);
if (size == 0)
return NULL;
else {
char *s = luaZ_openspace(S->L, S->b, --size);
LoadVector(S, s, size);
return luaS_newlstr(S->L, s, size);
}
}
static void LoadCode (LoadState *S, Proto *f) {
int n = LoadInt(S);
f->code = luaM_newvector(S->L, n, Instruction);
f->sizecode = n;
LoadVector(S, f->code, n);
}
static void LoadFunction(LoadState *S, Proto *f, TString *psource);
static void LoadConstants (LoadState *S, Proto *f) {
int i;
int n = LoadInt(S);
f->k = luaM_newvector(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_TNIL:
setnilvalue(o);
break;
case LUA_TBOOLEAN:
setbvalue(o, LoadByte(S));
break;
case LUA_TNUMFLT:
setfltvalue(o, LoadNumber(S));
break;
case LUA_TNUMINT:
setivalue(o, LoadInteger(S));
break;
case LUA_TSHRSTR:
case LUA_TLNGSTR:
setsvalue2n(S->L, o, LoadString(S));
break;
default:
lua_assert(0);
}
}
}
static void LoadProtos (LoadState *S, Proto *f) {
int i;
int n = LoadInt(S);
f->p = luaM_newvector(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);
LoadFunction(S, f->p[i], f->source);
}
}
static void LoadUpvalues (LoadState *S, Proto *f) {
int i, n;
n = LoadInt(S);
f->upvalues = luaM_newvector(S->L, n, Upvaldesc);
f->sizeupvalues = n;
for (i = 0; i < n; i++)
f->upvalues[i].name = NULL;
for (i = 0; i < n; i++) {
f->upvalues[i].instack = LoadByte(S);
f->upvalues[i].idx = LoadByte(S);
}
}
static void LoadDebug (LoadState *S, Proto *f) {
int i, n;
n = LoadInt(S);
f->lineinfo = luaM_newvector(S->L, n, int);
f->sizelineinfo = n;
LoadVector(S, f->lineinfo, 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 = NULL;
for (i = 0; i < n; i++) {
f->locvars[i].varname = LoadString(S);
f->locvars[i].startpc = LoadInt(S);
f->locvars[i].endpc = LoadInt(S);
}
n = LoadInt(S);
for (i = 0; i < n; i++)
f->upvalues[i].name = LoadString(S);
}
static void LoadFunction (LoadState *S, Proto *f, TString *psource) {
f->source = LoadString(S);
if (f->source == NULL) /* no source in dump? */
f->source = psource; /* reuse parent's source */
f->linedefined = LoadInt(S);
f->lastlinedefined = LoadInt(S);
f->numparams = LoadByte(S);
f->is_vararg = LoadByte(S);
f->maxstacksize = LoadByte(S);
LoadCode(S, f);
LoadConstants(S, f);
LoadUpvalues(S, f);
LoadProtos(S, f);
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 void fchecksize (LoadState *S, size_t size, const char *tname) {
if (LoadByte(S) != size)
error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));
}
#define checksize(S,t) fchecksize(S,sizeof(t),#t)
static void checkHeader (LoadState *S) {
checkliteral(S, LUA_SIGNATURE + 1, "not a"); /* 1st char already checked */
if (LoadByte(S) != LUAC_VERSION)
error(S, "version mismatch in");
if (LoadByte(S) != LUAC_FORMAT)
error(S, "format mismatch in");
checkliteral(S, LUAC_DATA, "corrupted");
checksize(S, int);
checksize(S, size_t);
checksize(S, Instruction);
checksize(S, lua_Integer);
checksize(S, lua_Number);
if (LoadInteger(S) != LUAC_INT)
error(S, "endianness mismatch in");
if (LoadNumber(S) != LUAC_NUM)
error(S, "float format mismatch in");
}
/*
** load precompiled chunk
*/
LClosure *luaU_undump(lua_State *L, ZIO *Z, Mbuffer *buff,
const char *name) {
LoadState S;
LClosure *cl;
if (*name == '@' || *name == '=')
S.name = name + 1;
else if (*name == LUA_SIGNATURE[0])
S.name = "binary string";
else
S.name = name;
S.L = L;
S.Z = Z;
S.b = buff;
checkHeader(&S);
cl = luaF_newLclosure(L, LoadByte(&S));
setclLvalue(L, L->top, cl);
incr_top(L);
cl->p = luaF_newproto(L);
LoadFunction(&S, cl->p, NULL);
lua_assert(cl->nupvalues == cl->p->sizeupvalues);
luai_verifycode(L, buff, cl->p);
return cl;
}