luac535.c

/* lua535
** $Id: luac.c,v 1.76 2018/06/19 01:32:02 lhf Exp $
** Lua compiler (saves bytecodes to files; also lists bytecodes)
** See Copyright Notice in lua.h
*/

#define luac_c
#define LUA_CORE

#include "lprefix.h"

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

#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 '%s'\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 '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);
}


static int doargs(int argc, char* argv[])
{
	
	#define IS(s)	(strcmp(argv[i], s) == 0)
	
	
	if (argv[0] != NULL && *argv[0] != 0)
		progname = argv[0];
	
	int i;
	int version = 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("'-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;
	
	
	#undef IS
	
}

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


static const Proto* combine(lua_State* L, int n)
{
	
	#define toproto(L,i) getproto(L->top + (i))
	
	
	if (n == 1) {
		return toproto(L, -1);
	} else {
		int i = n;
		if (lua_load(L, reader, &i, "=(" PROGNAME ")", NULL) != LUA_OK)
			fatal(lua_tostring(L, -1));
		
		Proto* f;
		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;
	}
	
	
	#undef toproto
	
}

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);
	
	if (!lua_checkstack(L, argc))
		fatal("too many input files");
	
	int i;
	for (i = 0; i < argc; i++) {
		const char* filename = strcmp(argv[i], "-") == 0 ? NULL : argv[i];
		if (luaL_loadfile(L, filename) != LUA_OK)
			fatal(lua_tostring(L, -1));
	}
	
	const Proto* f;
	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[])
{
	int i = doargs(argc, argv);
	argc -= i;
	argv += i;
	
	if (argc <= 0)
		usage("no input files given");
	
	lua_State* L;
	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: luac.c,v 1.76 2018/06/19 01:32:02 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 = tsslen(ts);
	
	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);
			}
			break;
		}
	}
	
	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_TNUMFLT: {
		char buff[100];
		sprintf(buff, LUA_NUMBER_FMT, fltvalue(o));
		printf("%s", buff);
		if (buff[strspn(buff, "-0123456789")] == '\0')
			printf(".0");
		break;
	}
	case LUA_TNUMINT:
		printf(LUA_INTEGER_FMT, ivalue(o));
		break;
	case LUA_TSHRSTR:
	case LUA_TLNGSTR:
		PrintString(tsvalue(o));
		break;
	default:				/* cannot happen */
		printf("? type=%d", ttype(o));
		break;
	}
}

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

static void PrintCode(const Proto* f)
{
	
	#define MYK(x)		(-1-(x))
	
	
	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_MOD:
		case OP_POW:
		case OP_DIV:
		case OP_IDIV:
		case OP_BAND:
		case OP_BOR:
		case OP_BXOR:
		case OP_SHL:
		case OP_SHR:
		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");
	}
	
	
	#undef MYK
	
}


static void PrintHeader(const Proto* f)
{
	
	#define SS(x)	((x == 1) ? "" : "s")
	#define S(x)	(int) (x), SS(x)
	
	
	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));
	
	
	#undef SS
	#undef S
	
}

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);
}