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many details (most by lhf).

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This commit is contained in:
Roberto Ierusalimschy
2000-03-03 11:58:26 -03:00
parent f7840a3e0b
commit 3c9d999424
32 changed files with 283 additions and 296 deletions
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118
lundump.c
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@@ -1,5 +1,5 @@
/*
** $Id: lundump.c,v 1.16 1999/12/02 19:11:51 roberto Exp roberto $
** $Id: lundump.c,v 1.26 2000/02/17 19:17:44 lhf Exp lhf $
** load bytecodes from files
** See Copyright Notice in lua.h
*/
@@ -50,22 +50,13 @@ static unsigned long LoadLong (lua_State* L, ZIO* Z)
return (hi<<16)|lo;
}
static real LoadNumber (lua_State* L, ZIO* Z, int native)
static real LoadNumber (lua_State* L, ZIO* Z)
{
if (native)
{
real x;
LoadBlock(L,&x,sizeof(x),Z);
return x;
}
else
{
char b[256];
int size=ezgetc(L,Z);
LoadBlock(L,b,size,Z);
b[size]=0;
return luaU_str2d(L,b,zname(Z));
}
char b[256];
int size=ezgetc(L,Z);
LoadBlock(L,b,size,Z);
b[size]=0;
return luaU_str2d(L,b,zname(Z));
}
static int LoadInt (lua_State* L, ZIO* Z, const char* message)
@@ -76,19 +67,15 @@ static int LoadInt (lua_State* L, ZIO* Z, const char* message)
return i;
}
#define PAD 5 /* two word operands plus opcode */
static Byte* LoadCode (lua_State* L, ZIO* Z)
static void LoadCode (lua_State* L, TProtoFunc* tf, ZIO* Z)
{
int size=LoadInt(L,Z,"code too long (%lu bytes) in %.255s");
Byte* b=luaM_malloc(L,size+PAD);
LoadBlock(L,b,size,Z);
if (b[size-1]!=ENDCODE) luaL_verror(L,"bad code in %.255s",zname(Z));
memset(b+size,ENDCODE,PAD); /* pad code for safety */
return b;
tf->code=luaM_newvector(L,size,Instruction);
LoadBlock(L,tf->code,size*sizeof(tf->code[0]),Z);
if (tf->code[size-1]!=ENDCODE) luaL_verror(L,"bad code in %.255s",zname(Z));
}
static TaggedString* LoadTString (lua_State* L, ZIO* Z)
static TaggedString* LoadString (lua_State* L, ZIO* Z)
{
long size=LoadLong(L,Z);
if (size==0)
@@ -97,7 +84,7 @@ static TaggedString* LoadTString (lua_State* L, ZIO* Z)
{
char* s=luaL_openspace(L,size);
LoadBlock(L,s,size,Z);
return luaS_newlstr(L,s,size-1);
return luaS_newlstr(L,s,size-1); /* remove trailing '\0' */
}
}
@@ -109,7 +96,7 @@ static void LoadLocals (lua_State* L, TProtoFunc* tf, ZIO* Z)
for (i=0; i<n; i++)
{
tf->locvars[i].line=LoadInt(L,Z,"too many lines (%lu) in %.255s");
tf->locvars[i].varname=LoadTString(L,Z);
tf->locvars[i].varname=LoadString(L,Z);
}
tf->locvars[i].line=-1; /* flag end of vector */
tf->locvars[i].varname=NULL;
@@ -119,31 +106,27 @@ static TProtoFunc* LoadFunction (lua_State* L, ZIO* Z, int native);
static void LoadConstants (lua_State* L, TProtoFunc* tf, ZIO* Z, int native)
{
int i,n=LoadInt(L,Z,"too many constants (%lu) in %.255s");
tf->nconsts=n;
if (n==0) return;
tf->consts=luaM_newvector(L,n,TObject);
for (i=0; i<n; i++)
int i,n;
tf->nkstr=n=LoadInt(L,Z,"too many strings (%lu) in %.255s");
if (n>0)
{
TObject* o=tf->consts+i;
ttype(o)=-ezgetc(L,Z); /* ttype(o) is negative - ORDER LUA_T */
switch (ttype(o))
{
case LUA_T_NUMBER:
nvalue(o)=LoadNumber(L,Z,native);
break;
case LUA_T_STRING:
tsvalue(o)=LoadTString(L,Z);
break;
case LUA_T_LPROTO:
tfvalue(o)=LoadFunction(L,Z,native);
break;
case LUA_T_NIL:
break;
default: /* cannot happen */
luaU_badconstant(L,"load",i,o,tf);
break;
}
tf->kstr=luaM_newvector(L,n,TaggedString*);
for (i=0; i<n; i++) tf->kstr[i]=LoadString(L,Z);
}
tf->nknum=n=LoadInt(L,Z,"too many numbers (%lu) in %.255s");
if (n>0)
{
tf->knum=luaM_newvector(L,n,real);
if (native)
LoadBlock(L,tf->knum,n*sizeof(tf->knum[0]),Z);
else
for (i=0; i<n; i++) tf->knum[i]=LoadNumber(L,Z);
}
tf->nkproto=n=LoadInt(L,Z,"too many functions (%lu) in %.255s");
if (n>0)
{
tf->kproto=luaM_newvector(L,n,TProtoFunc*);
for (i=0; i<n; i++) tf->kproto[i]=LoadFunction(L,Z,native);
}
}
@@ -151,9 +134,12 @@ static TProtoFunc* LoadFunction (lua_State* L, ZIO* Z, int native)
{
TProtoFunc* tf=luaF_newproto(L);
tf->lineDefined=LoadInt(L,Z,"lineDefined too large (%lu) in %.255s");
tf->source=LoadTString(L,Z);
tf->source=LoadString(L,Z);
if (tf->source==NULL) tf->source=luaS_new(L,zname(Z));
tf->code=LoadCode(L,Z);
tf->numparams=LoadInt(L,Z,"numparams too large (%lu) in %.255s");
tf->is_vararg=LoadInt(L,Z,"is_vararg too large (%lu) in %.255s");
tf->maxstacksize=LoadInt(L,Z,"maxstacksize too large (%lu) in %.255s");
LoadCode(L,tf,Z);
LoadLocals(L,tf,Z);
LoadConstants(L,tf,Z,native);
return tf;
@@ -167,6 +153,8 @@ static void LoadSignature (lua_State* L, ZIO* Z)
if (*s!=0) luaL_verror(L,"bad signature in %.255s",zname(Z));
}
#define V(v) v/16,v%16
static int LoadHeader (lua_State* L, ZIO* Z)
{
int version,sizeofR,native;
@@ -174,12 +162,12 @@ static int LoadHeader (lua_State* L, ZIO* Z)
version=ezgetc(L,Z);
if (version>VERSION)
luaL_verror(L,
"%.255s too new: version=0x%02x; expected at most 0x%02x",
zname(Z),version,VERSION);
"%.255s too new: its version is %d.%d; expected at most %d.%d",
zname(Z),V(version),V(VERSION));
if (version<VERSION0) /* check last major change */
luaL_verror(L,
"%.255s too old: version=0x%02x; expected at least 0x%02x",
zname(Z),version,VERSION0);
"%.255s too old: its version is %d.%d; expected at least %d.%d",
zname(Z),V(version),V(VERSION));
sizeofR=ezgetc(L,Z);
native=(sizeofR!=0);
if (native) /* test number representation */
@@ -189,9 +177,9 @@ static int LoadHeader (lua_State* L, ZIO* Z)
zname(Z),sizeofR,(int)sizeof(real));
else
{
real tf=TEST_NUMBER;
real f=LoadNumber(L,Z,native);
if ((long)f!=(long)tf)
real f=0,tf=TEST_NUMBER;
LoadBlock(L,&f,sizeof(f),Z);
if ((long)f!=(long)tf) /* disregard errors in last bit of fraction */
luaL_verror(L,"unknown number format in %.255s: "
"read " NUMBER_FMT "; expected " NUMBER_FMT,
zname(Z),f,tf);
@@ -219,16 +207,6 @@ TProtoFunc* luaU_undump1 (lua_State* L, ZIO* Z)
return NULL;
}
/*
* handle constants that cannot happen
*/
void luaU_badconstant (lua_State* L, const char* s, int i, const TObject* o, const TProtoFunc* tf)
{
int t=ttype(o);
const char* name= (t>0 || t<LUA_T_LINE) ? "?" : luaO_typenames[-t];
luaL_verror(L,"cannot %.255s constant #%d: type=%d [%s]" IN,s,i,t,name,INLOC);
}
/*
* convert number from text
*/