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uses ID_* constants 

simplified signature checking
loads local vars
This commit is contained in:
Luiz Henrique de Figueiredo 1996-03-01 00:43:50 -03:00
parent 870967ca77
commit cec1ffb80b
1 changed files with 40 additions and 15 deletions
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55
undump.c
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@ -3,7 +3,7 @@
** load bytecodes from files
*/
char *rcs_undump="$Id: undump.c,v 1.5 1996/02/26 19:44:17 lhf Exp lhf $";
char *rcs_undump="$Id: undump.c,v 1.6 1996/02/28 23:10:46 lhf Exp lhf $";
#include <stdio.h>
#include <string.h>
@ -11,7 +11,7 @@ char *rcs_undump="$Id: undump.c,v 1.5 1996/02/26 19:44:17 lhf Exp lhf $";
static void warn(char *s) /* TODO: remove */
{
fprintf(stderr,"luac: %s\n",s);
fprintf(stderr,"undump: %s\n",s);
}
static void panic(char *s) /* TODO: remove */
@ -73,45 +73,67 @@ static void LoadFunction(FILE *D)
Byte *p;
tf->marked=LoadWord(D);
tf->fileName=Main->fileName;
p=Main->code+tf->marked; /* TODO: tf->marked=? */
p=Main->code+tf->marked;
c.tf=tf;
*p++=c.m.c1; *p++=c.m.c2; *p++=c.m.c3; *p++=c.m.c4;
lastF->next=tf; lastF=tf;
lastF=lastF->next=tf;
}
#if 0
tf->marked=0; /* TODO: is this ok? */
#endif
tf->code=LoadBlock(tf->size,D);
while (1) /* unthread */
{
int c=getc(D);
if (c=='V')
if (c==ID_VAR) /* global var */
{
int i=LoadWord(D);
char *s=LoadString(D);
int v=luaI_findsymbolbyname(s); /* TODO: free s? */
Unthread(tf->code,i,v);
}
else if (c=='S')
else if (c==ID_STR) /* constant string */
{
int i=LoadWord(D);
char *s=LoadString(D);
int v=luaI_findconstantbyname(s); /* TODO: free s? */
Unthread(tf->code,i,v);
}
else if (c==ID_LOC) /* local vars */
{
int n=LoadWord(D);
LocVar *v;
if (n==0) continue;
tf->locvars=v=newvector(n,LocVar);
while (n--)
{
LocLoc(v)=LoadWord(D);
LoadString(D); /* TODO: how to save it? */
++v;
}
}
else
{
ungetc(c,D);
return;
break;
}
}
}
static void LoadSignature(FILE *D)
{
char *s=SIGNATURE;
while (*s!=0 && getc(D)==*s)
++s;
if (*s!=0) panic("bad signature");
}
static void LoadHeader(FILE *D) /* TODO: error handling */
{
char *s=LoadString(D);
Word w,tw=TEST_WORD;
float f,tf=TEST_FLOAT;
if (strcmp(s,SIGNATURE)!=0) panic("bad signature");
luaI_free(s);
getc(D); /* skip version */
LoadSignature(D);
getc(D); /* skip version */
fread(&w,sizeof(w),1,D); /* a word for testing byte ordering */
if (w!=tw) warn("different byte order");
fread(&f,sizeof(f),1,D); /* a float for testing byte ordering */
@ -124,7 +146,7 @@ static void LoadChunk(FILE *D)
while (1)
{
int c=getc(D);
if (c=='F') LoadFunction(D); else { ungetc(c,D); break; }
if (c==ID_FUN) LoadFunction(D); else { ungetc(c,D); break; }
}
#if 1
{ /* TODO: run Main? */
@ -140,9 +162,12 @@ void luaI_undump(FILE *D)
while (1)
{
int c=getc(D);
if (c==ESC) LoadChunk(D); else
if (c==EOF) return; else
panic("not a lua binary file");
if (c==ID_CHUNK)
LoadChunk(D);
else if (c==EOF)
break;
else
panic("not a lua binary file");
}
}