/*
** $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 1.69 2013/07/04 01:03:46 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 (ttypenv(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);
}
