/*
** $Id: luac.c,v 1.69 2011/11/29 17:46:33 lhf Exp $
** Lua compiler (saves bytecodes to files; also list bytecodes)
** See Copyright Notice in lua.h
*/

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define luac_c
#define LUA_CORE

#include "lua.h"
#include "lauxlib.h"

#include "lobject.h"
#include "lstate.h"
#include "lundump.h"

static void PrintFunction(const Proto *f, int full);
#define luaU_print PrintFunction

#define PROGNAME   "luac"               /* default program name */
#define OUTPUT     PROGNAME ".out"      /* default output file */

static int listing = 0;                 /* list bytecodes? */
static int dumping = 1;                 /* dump bytecodes? */
static int stripping = 0;               /* strip debug information? */
static char Output[] = { OUTPUT };      /* default output file name */
static const char *output = Output;     /* actual output file name */
static const char *progname = PROGNAME; /* actual program name */

static void fatal(const char *message) {
    fprintf(stderr, "%s: %s\n", progname, message);
    exit(EXIT_FAILURE);
}

static void cannot(const char *what) {
    fprintf(stderr, "%s: cannot %s %s: %s\n", progname, what, output, strerror(errno));
    exit(EXIT_FAILURE);
}

static void usage(const char *message) {
    if (*message == '-')
        fprintf(stderr, "%s: unrecognized option " LUA_QS "\n", progname, message);
    else
        fprintf(stderr, "%s: %s\n", progname, message);
    fprintf(stderr,
            "usage: %s [options] [filenames]\n"
            "Available options are:\n"
            "  -l       list (use -l -l for full listing)\n"
            "  -o name  output to file " LUA_QL("name") " (default is \"%s\")\n"
            "  -p       parse only\n"
            "  -s       strip debug information\n"
            "  -v       show version information\n"
            "  --       stop handling options\n"
            "  -        stop handling options and process stdin\n"
            , progname, Output);
    exit(EXIT_FAILURE);
}

#define IS(s) (strcmp(argv[i],s)==0)

static int doargs(int argc, char *argv[]) {
    int i;
    int version = 0;
    if (argv[0] != NULL && *argv[0] != 0) progname = argv[0];
    for (i = 1; i < argc; i++) {
        if (*argv[i] != '-')                  /* end of options; keep it */
            break;
        else if (IS("--")) {                  /* end of options; skip it */
            ++i;
            if (version) ++version;
            break;
        } else if (IS("-"))                   /* end of options; use stdin */
            break;
        else if (IS("-l"))                    /* list */
            ++listing;
        else if (IS("-o")) {                  /* output file */
            output = argv[++i];
            if (output == NULL || *output == 0 || (*output == '-' && output[1] != 0))
                usage(LUA_QL("-o") " needs argument");
            if (IS("-")) output = NULL;
        } else if (IS("-p"))                  /* parse only */
            dumping = 0;
        else if (IS("-s"))                    /* strip debug information */
            stripping = 1;
        else if (IS("-v"))                    /* show version */
            ++version;
        else                                  /* unknown option */
            usage(argv[i]);
    }
    if (i == argc && (listing || !dumping)) {
        dumping = 0;
        argv[--i] = Output;
    }
    if (version) {
        printf("%s\n", LUA_COPYRIGHT);
        if (version == argc - 1) exit(EXIT_SUCCESS);
    }
    return i;
}

#define FUNCTION "(function()end)();"

static const char *reader(lua_State *L, void *ud, size_t *size) {
    UNUSED(L);
    if ((*(int *)ud)--) {
        *size = sizeof(FUNCTION) - 1;
        return FUNCTION;
    } else {
        *size = 0;
        return NULL;
    }
}

#define toproto(L,i) getproto(L->top+(i))

static const Proto *combine(lua_State *L, int n) {
    if (n == 1)
        return toproto(L, -1);
    else {
        Proto *f;
        int i = n;
        if (lua_load(L, reader, &i, "=(" PROGNAME ")", NULL) != LUA_OK) fatal(lua_tostring(L, -1));
        f = toproto(L, -1);
        for (i = 0; i < n; i++) {
            f->p[i] = toproto(L, i - n - 1);
            if (f->p[i]->sizeupvalues > 0) f->p[i]->upvalues[0].instack = 0;
        }
        f->sizelineinfo = 0;
        return f;
    }
}

static int writer(lua_State *L, const void *p, size_t size, void *u) {
    UNUSED(L);
    return (fwrite(p, size, 1, (FILE *)u) != 1) && (size != 0);
}

static int pmain(lua_State *L) {
    int argc = (int)lua_tointeger(L, 1);
    char **argv = (char **)lua_touserdata(L, 2);
    const Proto *f;
    int i;
    if (!lua_checkstack(L, argc)) fatal("too many input files");
    for (i = 0; i < argc; i++) {
        const char *filename = IS("-") ? NULL : argv[i];
        if (luaL_loadfile(L, filename) != LUA_OK) fatal(lua_tostring(L, -1));
    }
    f = combine(L, argc);
    if (listing) luaU_print(f, listing > 1);
    if (dumping) {
        FILE *D = (output == NULL) ? stdout : fopen(output, "wb");
        if (D == NULL) cannot("open");
        lua_lock(L);
        luaU_dump(L, f, writer, D, stripping);
        lua_unlock(L);
        if (ferror(D)) cannot("write");
        if (fclose(D)) cannot("close");
    }
    return 0;
}

int main(int argc, char *argv[]) {
    lua_State *L;
    int i = doargs(argc, argv);
    argc -= i;
    argv += i;
    if (argc <= 0) usage("no input files given");
    L = luaL_newstate();
    if (L == NULL) fatal("cannot create state: not enough memory");
    lua_pushcfunction(L, &pmain);
    lua_pushinteger(L, argc);
    lua_pushlightuserdata(L, argv);
    if (lua_pcall(L, 2, 0, 0) != LUA_OK) fatal(lua_tostring(L, -1));
    lua_close(L);
    return EXIT_SUCCESS;
}

/*
** $Id: print.c,v 1.68 2011/09/30 10:21:20 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"

#define VOID(p) ((const void*)(p))

static void PrintString(const TString *ts) {
    const char *s = getstr(ts);
    size_t i, n = ts->tsv.len;
    printf("%c", '"');
    for (i = 0; i < n; i++) {
        int c = (int)(unsigned char)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(c))
                    printf("%c", c);
                else
                    printf("\\%03d", c);
        }
    }
    printf("%c", '"');
}

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;
    }
}

#define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-")
#define MYK(x) (-1-(x))

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 ax = GETARG_Ax(i);
        int bx = GETARG_Bx(i);
        int sbx = GETARG_sBx(i);
        int line = getfuncline(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) ? (MYK(INDEXK(b))) : b);
                if (getCMode(o) != OpArgN) printf(" %d", ISK(c) ? (MYK(INDEXK(c))) : c);
                break;
            case iABx:
                printf("%d", a);
                if (getBMode(o) == OpArgK) printf(" %d", MYK(bx));
                if (getBMode(o) == OpArgU) printf(" %d", bx);
                break;
            case iAsBx:
                printf("%d %d", a, sbx);
                break;
            case iAx:
                printf("%d", MYK(ax));
                break;
        }
        switch (o) {
            case OP_LOADK:
                printf("\t; ");
                PrintConstant(f, bx);
                break;
            case OP_GETUPVAL:
            case OP_SETUPVAL:
                printf("\t; %s", UPVALNAME(b));
                break;
            case OP_GETTABUP:
                printf("\t; %s", UPVALNAME(b));
                if (ISK(c)) { printf(" "); PrintConstant(f, INDEXK(c)); }
                break;
            case OP_SETTABUP:
                printf("\t; %s", UPVALNAME(a));
                if (ISK(b)) { printf(" "); PrintConstant(f, INDEXK(b)); }
                if (ISK(c)) { printf(" "); PrintConstant(f, INDEXK(c)); }
                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:
            case OP_TFORLOOP:
                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;
            case OP_EXTRAARG:
                printf("\t; ");
                PrintConstant(f, ax);
                break;
            default:
                break;
        }
        printf("\n");
    }
}

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

static void PrintHeader(const Proto *f) {
    const char *s = f->source ? 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 at %p)\n",
           (f->linedefined == 0) ? "main" : "function", s,
           f->linedefined, f->lastlinedefined,
           S(f->sizecode), VOID(f));
    printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
           (int)(f->numparams), f->is_vararg ? "+" : "", SS(f->numparams),
           S(f->maxstacksize), S(f->sizeupvalues));
    printf("%d local%s, %d constant%s, %d function%s\n",
           S(f->sizelocvars), S(f->sizek), S(f->sizep));
}

static void PrintDebug(const Proto *f) {
    int i, n;
    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");
    }
    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);
    }
    n = f->sizeupvalues;
    printf("upvalues (%d) for %p:\n", n, VOID(f));
    for (i = 0; i < n; i++) {
        printf("\t%d\t%s\t%d\t%d\n",
               i, UPVALNAME(i), f->upvalues[i].instack, f->upvalues[i].idx);
    }
}

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