+++ /dev/null
-/*
-** $Id: lundump.c,v 2.44 2015/11/02 16:09:30 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;
- 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 if (--size <= LUAI_MAXSHORTLEN) { /* short string? */
- char buff[LUAI_MAXSHORTLEN];
- LoadVector(S, buff, size);
- return luaS_newlstr(S->L, buff, size);
- }
- else { /* long string */
- TString *ts = luaS_createlngstrobj(S->L, size);
- LoadVector(S, getstr(ts), size); /* load directly in final place */
- return ts;
- }
-}
-
-
-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, 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;
- checkHeader(&S);
- cl = luaF_newLclosure(L, LoadByte(&S));
- setclLvalue(L, L->top, cl);
- luaD_inctop(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;
-}
-
projects / ceph.git / blobdiff