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/*
** $Id: print.c,v 1.21 1999/05/25 19:58:55 lhf Exp $
** print bytecodes
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include <stdlib.h>
#include "luac.h"
#ifdef DEBUG
static void PrintConstants(TProtoFunc* tf)
{
int i,n=tf->nconsts;
printf("constants (%d) for %p:\n",n,tf);
for (i=0; i<n; i++)
{
TObject* o=tf->consts+i;
printf("%6d ",i);
switch (ttype(o))
{
case LUA_T_NUMBER:
printf("N " NUMBER_FMT "\n",(double)nvalue(o));
break;
case LUA_T_STRING:
printf("S %p\t\"%s\"\n",tsvalue(o),svalue(o));
break;
case LUA_T_PROTO:
printf("F %p\n",tfvalue(o));
break;
case LUA_T_NIL:
printf("nil\n");
break;
default: /* cannot happen */
printf("? type=%d\n",ttype(o));
break;
}
}
}
#endif
static void PrintConstant(TProtoFunc* tf, int i, int at)
{
TObject* o=luaU_getconstant(tf,i,at);
switch (ttype(o))
{
case LUA_T_NUMBER:
printf(NUMBER_FMT,(double)nvalue(o));
break;
case LUA_T_STRING:
printf("\"%s\"",svalue(o));
break;
case LUA_T_PROTO:
printf("function at %p",(void*)tfvalue(o));
break;
case LUA_T_NIL:
printf("(nil)");
break;
default: /* cannot happen */
luaU_badconstant("print",i,o,tf);
break;
}
}
static void PrintCode(TProtoFunc* tf)
{
Byte* code=tf->code;
Byte* p=code;
int line=0;
int longarg=0;
for (;;)
{
Opcode OP;
int n=INFO(tf,p,&OP);
int i=OP.arg+longarg;
int at=p-code;
longarg=0;
printf("%6d ",at);
{
Byte* q=p;
int j=n;
while (j--) printf("%02X",*q++);
}
printf("%*s%-14s ",2*(5-n),"",OP.name);
if (OP.arg >=0) printf("%d",i);
if (OP.arg2>=0) printf(" %d",OP.arg2);
switch (OP.class)
{
case ENDCODE:
printf("\n");
return;
case PUSHCONSTANT:
case GETGLOBAL:
case SETGLOBAL:
case GETDOTTED:
case PUSHSELF:
case CLOSURE:
printf("\t; ");
PrintConstant(tf,i,at);
break;
case PUSHLOCAL:
case SETLOCAL:
{
char* s=luaF_getlocalname(tf,i+1,line);
if (s) printf("\t; %s",s);
break;
}
case SETLINE:
printf("\t; " SOURCE,tf->source->str,line=i);
break;
case LONGARG:
longarg=i<<16;
break;
/* suggested by Norman Ramsey <nr@cs.virginia.edu> */
case ONTJMP:
case ONFJMP:
case JMP:
case IFFJMP:
printf("\t; to %d",at+i+n);
break;
case IFTUPJMP:
case IFFUPJMP:
printf("\t; to %d",at-i+n);
break;
}
printf("\n");
p+=n;
}
}
static void PrintLocals(TProtoFunc* tf)
{
LocVar* v=tf->locvars;
int n,i;
if (v==NULL || v->line<0) return;
n=tf->code[1]; if (n>=ZEROVARARG) n-=ZEROVARARG;
printf("locals:");
for (i=0; i<n; v++,i++) /* arguments */
printf(" %s",v->varname->str);
for (; v->line>=0; v++)
{
if (v->varname==NULL)
{
--i; if (i<0) luaL_verror("bad locvars[%d]",v-tf->locvars); else printf(")");
}
else
{
++i; printf(" (%s",v->varname->str);
}
}
i-=n;
while (i--) printf(")");
printf("\n");
}
#define IsMain(tf) (tf->lineDefined==0)
static void PrintHeader(TProtoFunc* tf, TProtoFunc* Main, int at)
{
int size=luaU_codesize(tf);
if (IsMain(tf))
printf("\nmain " SOURCE " (%d bytes at %p)\n",
tf->source->str,tf->lineDefined,size,tf);
else
{
printf("\nfunction " SOURCE " (%d bytes at %p); used at ",
tf->source->str,tf->lineDefined,size,tf);
if (Main && IsMain(Main))
printf("main");
else
printf("%p",Main);
printf("+%d\n",at);
}
}
static void PrintFunction(TProtoFunc* tf, TProtoFunc* Main, int at);
static void PrintFunctions(TProtoFunc* Main)
{
Byte* code=Main->code;
Byte* p=code;
int longarg=0;
for (;;)
{
Opcode OP;
int n=INFO(Main,p,&OP);
int op=OP.class;
int i=OP.arg+longarg;
longarg=0;
if (op==PUSHCONSTANT || op==CLOSURE)
{
TObject* o=Main->consts+i;
if (ttype(o)==LUA_T_PROTO) PrintFunction(tfvalue(o),Main,(int)(p-code));
}
else if (op==LONGARG) longarg=i<<16;
else if (op==ENDCODE) break;
p+=n;
}
}
static void PrintFunction(TProtoFunc* tf, TProtoFunc* Main, int at)
{
PrintHeader(tf,Main,at);
PrintLocals(tf);
PrintCode(tf);
#ifdef DEBUG
PrintConstants(tf);
#endif
PrintFunctions(tf);
}
void luaU_printchunk(TProtoFunc* Main)
{
PrintFunction(Main,0,0);
}
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