/*
** $Id: print.c,v 1.55a 2006/05/31 13:30:05 lhf Exp $
** print bytecodes
** See Copyright Notice in lua.h
*/

#include <ctype.h>
#include <stdio.h>

#define luac_c
#define LUA_CORE

#include "ldebug.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lundump.h"

#define PrintFunction luaU_print

#define Sizeof(x) ((int)sizeof(x))
#define VOID(p) ((const void *)(p))

static void PrintString(const TString *ts)
{
    const char *s = getstr(ts);
    size_t i, n = ts->tsv.len;
    putchar('"');
    for (i = 0; i < n; i++) {
        int c = s[i];
        switch (c) {
        case '"':
            printf("\\\"");
            break;
        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:
            if (isprint((unsigned char)c))
                putchar(c);
            else
                printf("\\%03u", (unsigned char)c);
        }
    }
    putchar('"');
}

static void PrintConstant(const Proto *f, int i)
{
    const TValue *o = &f->k[i];
    switch (ttype(o)) {
    case LUA_TNIL:
        printf("nil");
        break;
    case LUA_TBOOLEAN:
        printf(bvalue(o) ? "true" : "false");
        break;
    case LUA_TNUMBER:
        printf(LUA_NUMBER_FMT, nvalue(o));
        break;
    case LUA_TSTRING:
        PrintString(rawtsvalue(o));
        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 bx = GETARG_Bx(i);
        int sbx = GETARG_sBx(i);
        int line = getline(f, pc);
        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", a);
            if (getBMode(o) != OpArgN)
                printf(" %d", ISK(b) ? (-1 - INDEXK(b)) : b);
            if (getCMode(o) != OpArgN)
                printf(" %d", ISK(c) ? (-1 - INDEXK(c)) : c);
            break;
        case iABx:
            if (getBMode(o) == OpArgK)
                printf("%d %d", a, -1 - bx);
            else
                printf("%d %d", a, bx);
            break;
        case iAsBx:
            if (o == OP_JMP)
                printf("%d", sbx);
            else
                printf("%d %d", a, sbx);
            break;
        }
        switch (o) {
        case OP_LOADK:
            printf("\t; ");
            PrintConstant(f, bx);
            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[bx]));
            break;
        case OP_GETTABLE:
        case OP_SELF:
            if (ISK(c)) {
                printf("\t; ");
                PrintConstant(f, INDEXK(c));
            }
            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 (ISK(b) || ISK(c)) {
                printf("\t; ");
                if (ISK(b))
                    PrintConstant(f, INDEXK(b));
                else
                    printf("-");
                printf(" ");
                if (ISK(c))
                    PrintConstant(f, INDEXK(c));
                else
                    printf("-");
            }
            break;
        case OP_JMP:
        case OP_FORLOOP:
        case OP_FORPREP:
            printf("\t; to %d", sbx + pc + 2);
            break;
        case OP_CLOSURE:
            printf("\t; %p", VOID(f->p[bx]));
            break;
        case OP_SETLIST:
            if (c == 0)
                printf("\t; %d", (int)code[++pc]);
            else
                printf("\t; %d", c);
            break;
        default:
            break;
        }
        printf("\n");
    }
}

#define SS(x) (x == 1) ? "" : "s"
#define S(x) x, SS(x)

static void PrintHeader(const Proto *f)
{
    const char *s = getstr(f->source);
    if (*s == '@' || *s == '=')
        s++;
    else if (*s == LUA_SIGNATURE[0])
        s = "(bstring)";
    else
        s = "(string)";
    printf("\n%s <%s:%d,%d> (%d instruction%s, %d bytes at %p)\n",
           (f->linedefined == 0) ? "main" : "function", s, f->linedefined,
           f->lastlinedefined, S(f->sizecode),
           f->sizecode * Sizeof(Instruction), VOID(f));
    printf("%d%s param%s, %d slot%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));
}

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 + 1);
        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 + 1, f->locvars[i].endpc + 1);
    }
}

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]));
    }
}

void PrintFunction(const Proto *f, int full)
{
    int i, n = f->sizep;
    PrintHeader(f);
    PrintCode(f);
    if (full) {
        PrintConstants(f);
        PrintLocals(f);
        PrintUpvalues(f);
    }
    for (i = 0; i < n; i++)
        PrintFunction(f->p[i], full);
}
