print.c
(5.0.3)
/*
** $Id: print.c,v 1.44 2003/04/07 20:34:20 lhf Exp $
** print bytecodes
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#if 0
#define DEBUG_PRINT
#endif
#ifndef LUA_OPNAMES
#define LUA_OPNAMES
#endif
#include "ldebug.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lundump.h"
#define Sizeof(x) ((int)sizeof(x))
#define VOID(p) ((const void*)(p))
static void PrintString(const Proto* f, int n)
{
const char* s=svalue(&f->k[n]);
putchar('"');
for (; *s; s++)
{
switch (*s)
{
case '"': printf("\\\""); break;
case '\a': printf("\\a"); break;
case '\b': printf("\\b"); break;
case '\f': printf("\\f"); break;
case '\n': printf("\\n"); break;
case '\r': printf("\\r"); break;
case '\t': printf("\\t"); break;
case '\v': printf("\\v"); break;
default: putchar(*s); break;
}
}
putchar('"');
}
static void PrintConstant(const Proto* f, int i)
{
const TObject* o=&f->k[i];
switch (ttype(o))
{
case LUA_TNUMBER:
printf(LUA_NUMBER_FMT,nvalue(o));
break;
case LUA_TSTRING:
PrintString(f,i);
break;
case LUA_TNIL:
printf("nil");
break;
default: /* cannot happen */
printf("? type=%d",ttype(o));
break;
}
}
static void PrintCode(const Proto* f)
{
const Instruction* code=f->code;
int pc,n=f->sizecode;
for (pc=0; pc<n; pc++)
{
Instruction i=code[pc];
OpCode o=GET_OPCODE(i);
int a=GETARG_A(i);
int b=GETARG_B(i);
int c=GETARG_C(i);
int bc=GETARG_Bx(i);
int sbc=GETARG_sBx(i);
int line=getline(f,pc);
#if 0
printf("%0*lX",Sizeof(i)*2,i);
#endif
printf("\t%d\t",pc+1);
if (line>0) printf("[%d]\t",line); else printf("[-]\t");
printf("%-9s\t",luaP_opnames[o]);
switch (getOpMode(o))
{
case iABC: printf("%d %d %d",a,b,c); break;
case iABx: printf("%d %d",a,bc); break;
case iAsBx: printf("%d %d",a,sbc); break;
}
switch (o)
{
case OP_LOADK:
printf("\t; "); PrintConstant(f,bc);
break;
case OP_GETUPVAL:
case OP_SETUPVAL:
printf("\t; %s", (f->sizeupvalues>0) ? getstr(f->upvalues[b]) : "-");
break;
case OP_GETGLOBAL:
case OP_SETGLOBAL:
printf("\t; %s",svalue(&f->k[bc]));
break;
case OP_GETTABLE:
case OP_SELF:
if (c>=MAXSTACK) { printf("\t; "); PrintConstant(f,c-MAXSTACK); }
break;
case OP_SETTABLE:
case OP_ADD:
case OP_SUB:
case OP_MUL:
case OP_DIV:
case OP_POW:
case OP_EQ:
case OP_LT:
case OP_LE:
if (b>=MAXSTACK || c>=MAXSTACK)
{
printf("\t; ");
if (b>=MAXSTACK) PrintConstant(f,b-MAXSTACK); else printf("-");
printf(" ");
if (c>=MAXSTACK) PrintConstant(f,c-MAXSTACK);
}
break;
case OP_JMP:
case OP_FORLOOP:
case OP_TFORPREP:
printf("\t; to %d",sbc+pc+2);
break;
case OP_CLOSURE:
printf("\t; %p",VOID(f->p[bc]));
break;
default:
break;
}
printf("\n");
}
}
static const char* Source(const Proto* f)
{
const char* s=getstr(f->source);
if (*s=='@' || *s=='=')
return s+1;
else if (*s==LUA_SIGNATURE[0])
return "(bstring)";
else
return "(string)";
}
#define IsMain(f) (f->lineDefined==0)
#define SS(x) (x==1)?"":"s"
#define S(x) x,SS(x)
static void PrintHeader(const Proto* f)
{
printf("\n%s <%s:%d> (%d instruction%s, %d bytes at %p)\n",
IsMain(f)?"main":"function",Source(f),f->lineDefined,
S(f->sizecode),f->sizecode*Sizeof(Instruction),VOID(f));
printf("%d%s param%s, %d stack%s, %d upvalue%s, ",
f->numparams,f->is_vararg?"+":"",SS(f->numparams),S(f->maxstacksize),
S(f->nups));
printf("%d local%s, %d constant%s, %d function%s\n",
S(f->sizelocvars),S(f->sizek),S(f->sizep));
}
#ifdef DEBUG_PRINT
static void PrintConstants(const Proto* f)
{
int i,n=f->sizek;
printf("constants (%d) for %p:\n",n,VOID(f));
for (i=0; i<n; i++)
{
printf("\t%d\t",i);
PrintConstant(f,i);
printf("\n");
}
}
static void PrintLocals(const Proto* f)
{
int i,n=f->sizelocvars;
printf("locals (%d) for %p:\n",n,VOID(f));
for (i=0; i<n; i++)
{
printf("\t%d\t%s\t%d\t%d\n",
i,getstr(f->locvars[i].varname),f->locvars[i].startpc,f->locvars[i].endpc);
}
}
static void PrintUpvalues(const Proto* f)
{
int i,n=f->sizeupvalues;
printf("upvalues (%d) for %p:\n",n,VOID(f));
if (f->upvalues==NULL) return;
for (i=0; i<n; i++)
{
printf("\t%d\t%s\n",i,getstr(f->upvalues[i]));
}
}
#endif
void luaU_print(const Proto* f)
{
int i,n=f->sizep;
PrintHeader(f);
PrintCode(f);
#ifdef DEBUG_PRINT
PrintConstants(f);
PrintLocals(f);
PrintUpvalues(f);
#endif
for (i=0; i<n; i++) luaU_print(f->p[i]);
}