commit 0e8855e171ffa957d08d1a1df707d917a029b39f
parent 2ae9c856cfd8db834e023ee0b00601d02df9b388
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 25 Apr 2000 13:44:09 -0300
final version (by lhf)
Diffstat:
| M | lundump.c | | | 133 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------------- |
| M | lundump.h | | | 13 | ++++++------- |
2 files changed, 102 insertions(+), 44 deletions(-)
diff --git a/lundump.c b/lundump.c
@@ -1,5 +1,5 @@
/*
-** $Id: lundump.c,v 1.18 2000/03/03 14:58:26 roberto Exp roberto $
+** $Id: lundump.c,v 1.28 2000/04/24 19:32:58 lhf Exp $
** load bytecodes from files
** See Copyright Notice in lua.h
*/
@@ -17,10 +17,17 @@
#include "lundump.h"
#define LoadBlock(L,b,size,Z) ezread(L,Z,b,size)
+#define LoadByte ezgetc
+
+static const char* ZNAME(ZIO* Z)
+{
+ const char* s=zname(Z);
+ return (*s=='@') ? s+1 : s;
+}
static void unexpectedEOZ (lua_State* L, ZIO* Z)
{
- luaL_verror(L,"unexpected end of file in %.255s",zname(Z));
+ luaL_verror(L,"unexpected end of file in `%.255s'",ZNAME(Z));
}
static int ezgetc (lua_State* L, ZIO* Z)
@@ -56,25 +63,18 @@ static Number LoadNumber (lua_State* L, ZIO* Z)
int size=ezgetc(L,Z);
LoadBlock(L,b,size,Z);
b[size]=0;
- return luaU_str2d(L,b,zname(Z));
+ return luaU_str2d(L,b,ZNAME(Z));
}
static int LoadInt (lua_State* L, ZIO* Z, const char* message)
{
unsigned long l=LoadLong(L,Z);
unsigned int i=l;
- if (i!=l) luaL_verror(L,message,l,zname(Z));
+ if (i!=l) luaL_verror(L,"%s in `%.255s';\n"
+ " read %lu; expected %u",message,ZNAME(Z),l,-1);
return i;
}
-static void LoadCode (lua_State* L, Proto* tf, ZIO* Z)
-{
- int size=LoadInt(L,Z,"code too long (%lu bytes) in %.255s");
- tf->code=luaM_newvector(L,size,Instruction);
- LoadBlock(L,tf->code,size*sizeof(tf->code[0]),Z);
- if (tf->code[size-1]!=OP_END) luaL_verror(L,"bad code in %.255s",zname(Z));
-}
-
static TString* LoadString (lua_State* L, ZIO* Z)
{
long size=LoadLong(L,Z);
@@ -88,14 +88,55 @@ static TString* LoadString (lua_State* L, ZIO* Z)
}
}
+static void SwapCode (lua_State* L, Instruction* code, int size, ZIO* Z)
+{
+ unsigned char* p;
+ int c;
+ if (sizeof(Instruction)==4)
+ while (size--)
+ {
+ p=(unsigned char *) code++;
+ c=p[0]; p[0]=p[3]; p[3]=c;
+ c=p[1]; p[1]=p[2]; p[2]=c;
+ }
+ else if (sizeof(Instruction)==2)
+ while (size--)
+ {
+ p=(unsigned char *) code++;
+ c=p[0]; p[0]=p[1]; p[1]=c;
+ }
+ else
+ luaL_verror(L,"cannot swap code with %d-byte instructions in `%.255s'",
+ (int)sizeof(Instruction),ZNAME(Z));
+}
+
+static void LoadCode (lua_State* L, Proto* tf, ZIO* Z)
+{
+ int size=LoadInt(L,Z,"code too long");
+ Instruction t=0,tt=TEST_CODE;
+ tf->code=luaM_newvector(L,size,Instruction);
+ LoadBlock(L,tf->code,size*sizeof(*tf->code),Z);
+ if (tf->code[size-1]!=OP_END) luaL_verror(L,"bad code in `%.255s'",ZNAME(Z));
+ LoadBlock(L,&t,sizeof(t),Z);
+ if (t!=tt)
+ {
+ Instruction ot=t;
+ SwapCode(L,&t,1,Z);
+ if (t!=tt) luaL_verror(L,"cannot swap code in `%.255s';\n"
+ " read 0x%08X; swapped to 0x%08X; expected 0x%08X",
+ ZNAME(Z),(unsigned long)ot,(unsigned long)t,(unsigned long)tt);
+ SwapCode(L,tf->code,size,Z);
+ }
+}
+
static void LoadLocals (lua_State* L, Proto* tf, ZIO* Z)
{
- int i,n=LoadInt(L,Z,"too many locals (%lu) in %.255s");
+ int i,n=LoadInt(L,Z,"too many locals");
if (n==0) return;
tf->locvars=luaM_newvector(L,n+1,LocVar);
for (i=0; i<n; i++)
{
- tf->locvars[i].line=LoadInt(L,Z,"too many lines (%lu) in %.255s");
+ tf->locvars[i].line=LoadInt(L,Z,"too many lines");
tf->locvars[i].varname=LoadString(L,Z);
}
tf->locvars[i].line=-1; /* flag end of vector */
@@ -107,22 +148,28 @@ static Proto* LoadFunction (lua_State* L, ZIO* Z, int native);
static void LoadConstants (lua_State* L, Proto* tf, ZIO* Z, int native)
{
int i,n;
- tf->nkstr=n=LoadInt(L,Z,"too many strings (%lu) in %.255s");
+ tf->nkstr=n=LoadInt(L,Z,"too many strings");
if (n>0)
{
tf->kstr=luaM_newvector(L,n,TString*);
- for (i=0; i<n; i++) tf->kstr[i]=LoadString(L,Z);
+ for (i=0; i<n; i++)
+ {
+ TString* s=LoadString(L,Z);
+ int isglobal=LoadByte(L,Z);
+ if (isglobal) luaS_assertglobal(L,s);
+ tf->kstr[i]=s;
+ }
}
- tf->nknum=n=LoadInt(L,Z,"too many numbers (%lu) in %.255s");
+ tf->nknum=n=LoadInt(L,Z,"too many numbers");
if (n>0)
{
tf->knum=luaM_newvector(L,n,Number);
if (native)
- LoadBlock(L,tf->knum,n*sizeof(tf->knum[0]),Z);
+ LoadBlock(L,tf->knum,n*sizeof(*tf->knum),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");
+ tf->nkproto=n=LoadInt(L,Z,"too many functions");
if (n>0)
{
tf->kproto=luaM_newvector(L,n,Proto*);
@@ -133,12 +180,12 @@ static void LoadConstants (lua_State* L, Proto* tf, ZIO* Z, int native)
static Proto* LoadFunction (lua_State* L, ZIO* Z, int native)
{
Proto* tf=luaF_newproto(L);
- tf->lineDefined=LoadInt(L,Z,"lineDefined too large (%lu) in %.255s");
tf->source=LoadString(L,Z);
if (tf->source==NULL) tf->source=luaS_new(L,zname(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");
+ tf->lineDefined=LoadInt(L,Z,"lineDefined too large");
+ tf->numparams=LoadInt(L,Z,"too many parameters");
+ tf->is_vararg=LoadByte(L,Z);
+ tf->maxstacksize=LoadInt(L,Z,"too much stack needed");
LoadCode(L,tf,Z);
LoadLocals(L,tf,Z);
LoadConstants(L,tf,Z,native);
@@ -150,7 +197,7 @@ static void LoadSignature (lua_State* L, ZIO* Z)
const char* s=SIGNATURE;
while (*s!=0 && ezgetc(L,Z)==*s)
++s;
- if (*s!=0) luaL_verror(L,"bad signature in %.255s",zname(Z));
+ if (*s!=0) luaL_verror(L,"bad signature in `%.255s'",ZNAME(Z));
}
#define V(v) v/16,v%16
@@ -161,28 +208,40 @@ static int LoadHeader (lua_State* L, ZIO* Z)
LoadSignature(L,Z);
version=ezgetc(L,Z);
if (version>VERSION)
- luaL_verror(L,
- "%.255s too new: its version is %d.%d; expected at most %d.%d",
- zname(Z),V(version),V(VERSION));
+ luaL_verror(L,"`%.255s' too new:\n"
+ " read version %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: its version is %d.%d; expected at least %d.%d",
- zname(Z),V(version),V(VERSION));
+ luaL_verror(L,"`%.255s' too old:\n"
+ " read version %d.%d; expected at least %d.%d",
+ ZNAME(Z),V(version),V(VERSION));
+ {
+ int I=ezgetc(L,Z);
+ int i=ezgetc(L,Z);
+ int op=ezgetc(L,Z);
+ int b=ezgetc(L,Z);
+ if (I!=sizeof(Instruction) || i!=SIZE_INSTRUCTION || op!=SIZE_OP || b!=SIZE_B)
+ luaL_verror(L,"virtual machine mismatch in `%.255s':\n"
+ " read %d-bit,%d-byte instructions, %d-bit opcodes, %d-bit b-arguments;\n"
+ " expected %d-bit,%d-byte instructions, %d-bit opcodes, %d-bit b-arguments",
+ ZNAME(Z),i,I,op,b,SIZE_INSTRUCTION,(int)sizeof(Instruction),SIZE_OP,SIZE_B);
+ }
sizeofR=ezgetc(L,Z);
native=(sizeofR!=0);
if (native) /* test number representation */
{
if (sizeofR!=sizeof(Number))
- luaL_verror(L,"unknown number size in %.255s: read %d; expected %d",
- zname(Z),sizeofR,(int)sizeof(Number));
+ luaL_verror(L,"native number size mismatch in `%.255s':\n"
+ " read %d; expected %d",
+ ZNAME(Z),sizeofR,(int)sizeof(Number));
else
{
Number 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);
+ luaL_verror(L,"unknown number format in `%.255s':\n"
+ " read " NUMBER_FMT "; expected " NUMBER_FMT,
+ ZNAME(Z),f,tf);
}
}
return native;
@@ -203,7 +262,7 @@ Proto* luaU_undump1 (lua_State* L, ZIO* Z)
if (c==ID_CHUNK)
return LoadChunk(L,Z);
else if (c!=EOZ)
- luaL_verror(L,"%.255s is not a Lua binary file",zname(Z));
+ luaL_verror(L,"`%.255s' is not a Lua binary file",ZNAME(Z));
return NULL;
}
@@ -214,6 +273,6 @@ double luaU_str2d (lua_State* L, const char* b, const char* where)
{
double x;
if (!luaO_str2d(b,&x))
- luaL_verror(L,"cannot convert number '%.255s' in %.255s",b,where);
+ luaL_verror(L,"cannot convert number `%.255s' in `%.255s'",b,where);
return x;
}
diff --git a/lundump.h b/lundump.h
@@ -1,5 +1,5 @@
/*
-** $Id: lundump.h,v 1.13 2000/03/03 14:58:26 roberto Exp roberto $
+** $Id: lundump.h,v 1.19 2000/04/24 17:32:29 lhf Exp $
** load pre-compiled Lua chunks
** See Copyright Notice in lua.h
*/
@@ -13,16 +13,12 @@
/* load one chunk */
Proto* luaU_undump1 (lua_State* L, ZIO* Z);
-/* handle cases that cannot happen */
-void luaU_badconstant (lua_State* L, const char* s, int i,
- const TObject* o, const Proto* tf);
-
/* convert number from text */
double luaU_str2d (lua_State* L, const char* b, const char* where);
/* definitions for headers of binary files */
-#define VERSION 0x33 /* last format change was in 3.3 */
-#define VERSION0 0x33 /* last major change was in 3.3 */
+#define VERSION 0x40 /* last format change was in 4.0 */
+#define VERSION0 0x40 /* last major change was in 4.0 */
#define ID_CHUNK 27 /* binary files start with ESC... */
#define SIGNATURE "Lua" /* ...followed by this signature */
@@ -41,4 +37,7 @@ double luaU_str2d (lua_State* L, const char* b, const char* where);
/* multiplying by 1E8 gives non-trivial integer values */
#define TEST_NUMBER 3.14159265358979323846E8
+/* something for testing byte order in instructions */
+#define TEST_CODE 0x01020304
+
#endif
