1 files changed, 279 insertions, 0 deletions

diff --git a/src/lua-5.3/lundump.c b/src/lua-5.3/lundump.c
new file mode 100644
index 0000000..7a67d75
--- /dev/null
+++ b/src/lua-5.3/lundump.c
@@ -0,0 +1,279 @@
+/*
+** $Id: lundump.c,v 2.44.1.1 2017/04/19 17:20:42 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;
+}
+