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main.cpp
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main.cpp
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#include <stdlib.h>
#include <string.h>
#include "gmqcc.h"
#include "lexer.h"
#include "parser.h"
/* TODO: cleanup this whole file .. it's a fuckign mess */
/* set by the standard */
const oper_info *operators = nullptr;
size_t operator_count = 0;
static bool opts_output_wasset = false;
struct argitem { char *filename; int type; };
struct ppitem { char *name; char *value; };
static argitem *items = nullptr;
static ppitem *ppems = nullptr;
#define TYPE_QC 0
#define TYPE_ASM 1
#define TYPE_SRC 2
static const char *app_name;
static void version(void) {
con_out("GMQCC %d.%d.%d Built %s %s\n" GMQCC_DEV_VERSION_STRING,
GMQCC_VERSION_MAJOR,
GMQCC_VERSION_MINOR,
GMQCC_VERSION_PATCH,
__DATE__,
__TIME__
);
}
static int usage(void) {
con_out("usage: %s [options] [files...]", app_name);
con_out("options:\n"
" -h, --help show this help message\n"
" -debug turns on compiler debug messages\n");
con_out(" -o, --output=file output file, defaults to progs.dat\n"
" -s filename add a progs.src file to be used\n");
con_out(" -E stop after preprocessing\n");
con_out(" -q, --quiet be less verbose\n");
con_out(" -config file use the specified ini file\n");
con_out(" -std=standard select one of the following standards\n"
" -std=qcc original QuakeC\n"
" -std=fteqcc fteqcc QuakeC\n"
" -std=gmqcc this compiler (default)\n");
con_out(" -f<flag> enable a flag\n"
" -fno-<flag> disable a flag\n"
" -fhelp list possible flags\n");
con_out(" -W<warning> enable a warning\n"
" -Wno-<warning> disable a warning\n"
" -Wall enable all warnings\n");
con_out(" -Werror treat warnings as errors\n"
" -Werror-<warning> treat a warning as error\n"
" -Wno-error-<warning> opposite of the above\n");
con_out(" -Whelp list possible warnings\n");
con_out(" -O<number> optimization level\n"
" -O<name> enable specific optimization\n"
" -Ono-<name> disable specific optimization\n"
" -Ohelp list optimizations\n");
con_out(" -force-crc=num force a specific checksum into the header\n");
con_out(" -state-fps=num emulate OP_STATE with the specified FPS\n");
con_out(" -coverage add coverage support\n");
return -1;
}
/* command line parsing */
static bool options_witharg(int *argc_, char ***argv_, char **out) {
int argc = *argc_;
char **argv = *argv_;
if (argv[0][2]) {
*out = argv[0]+2;
return true;
}
/* eat up the next */
if (argc < 2) /* no parameter was provided */
return false;
*out = argv[1];
--*argc_;
++*argv_;
return true;
}
static bool options_long_witharg_all(const char *optname, int *argc_, char ***argv_, char **out, int ds, bool split) {
int argc = *argc_;
char **argv = *argv_;
size_t len = strlen(optname);
if (strncmp(argv[0]+ds, optname, len))
return false;
/* it's --optname, check how the parameter is supplied */
if (argv[0][ds+len] == '=') {
/* using --opt=param */
*out = argv[0]+ds+len+1;
return true;
}
if (!split || argc < ds) /* no parameter was provided, or only single-arg form accepted */
return false;
/* using --opt param */
*out = argv[1];
--*argc_;
++*argv_;
return true;
}
static bool options_long_witharg(const char *optname, int *argc_, char ***argv_, char **out) {
return options_long_witharg_all(optname, argc_, argv_, out, 2, true);
}
static bool options_long_gcc(const char *optname, int *argc_, char ***argv_, char **out) {
return options_long_witharg_all(optname, argc_, argv_, out, 1, false);
}
static bool options_parse(int argc, char **argv, bool *has_progs_src) {
bool argend = false;
size_t itr;
char buffer[1024];
char *config = nullptr;
while (!argend && argc > 1) {
char *argarg;
argitem item;
ppitem macro;
++argv;
--argc;
if (argv[0][0] == '-') {
/* All gcc-type long options */
if (options_long_gcc("std", &argc, &argv, &argarg)) {
if (!strcmp(argarg, "gmqcc") || !strcmp(argarg, "default")) {
opts_set(opts.flags, ADJUST_VECTOR_FIELDS, true);
opts_set(opts.flags, CORRECT_LOGIC, true);
opts_set(opts.flags, SHORT_LOGIC, true);
opts_set(opts.flags, UNTYPED_NIL, true);
opts_set(opts.flags, VARIADIC_ARGS, true);
opts_set(opts.flags, FALSE_EMPTY_STRINGS, false);
opts_set(opts.flags, TRUE_EMPTY_STRINGS, true);
opts_set(opts.flags, LOOP_LABELS, true);
opts_set(opts.flags, TRANSLATABLE_STRINGS, true);
opts_set(opts.flags, INITIALIZED_NONCONSTANTS, true);
opts_set(opts.werror, WARN_INVALID_PARAMETER_COUNT, true);
opts_set(opts.werror, WARN_MISSING_RETURN_VALUES, true);
opts_set(opts.flags, EXPRESSIONS_FOR_BUILTINS, true);
opts_set(opts.warn, WARN_BREAKDEF, true);
OPTS_OPTION_U32(OPTION_STANDARD) = COMPILER_GMQCC;
} else if (!strcmp(argarg, "qcc")) {
opts_set(opts.flags, ADJUST_VECTOR_FIELDS, false);
opts_set(opts.flags, ASSIGN_FUNCTION_TYPES, true);
OPTS_OPTION_U32(OPTION_STANDARD) = COMPILER_QCC;
} else if (!strcmp(argarg, "fte") || !strcmp(argarg, "fteqcc")) {
opts_set(opts.flags, FTEPP, true);
opts_set(opts.flags, TRANSLATABLE_STRINGS, true);
opts_set(opts.flags, ADJUST_VECTOR_FIELDS, false);
opts_set(opts.flags, ASSIGN_FUNCTION_TYPES, true);
opts_set(opts.flags, CORRECT_TERNARY, false);
opts_set(opts.warn, WARN_TERNARY_PRECEDENCE, true);
opts_set(opts.warn, WARN_BREAKDEF, true);
OPTS_OPTION_U32(OPTION_STANDARD) = COMPILER_FTEQCC;
} else if (!strcmp(argarg, "qccx")) {
opts_set(opts.flags, ADJUST_VECTOR_FIELDS, false);
OPTS_OPTION_U32(OPTION_STANDARD) = COMPILER_QCCX;
} else {
con_out("Unknown standard: %s\n", argarg);
return false;
}
continue;
}
if (options_long_gcc("force-crc", &argc, &argv, &argarg)) {
OPTS_OPTION_BOOL(OPTION_FORCECRC) = true;
OPTS_OPTION_U16 (OPTION_FORCED_CRC) = strtol(argarg, nullptr, 0);
continue;
}
if (options_long_gcc("state-fps", &argc, &argv, &argarg)) {
OPTS_OPTION_U32(OPTION_STATE_FPS) = strtol(argarg, nullptr, 0);
opts_set(opts.flags, EMULATE_STATE, true);
continue;
}
if (options_long_gcc("config", &argc, &argv, &argarg)) {
config = argarg;
continue;
}
if (options_long_gcc("progsrc", &argc, &argv, &argarg)) {
OPTS_OPTION_STR(OPTION_PROGSRC) = argarg;
*has_progs_src = true;
continue;
}
/* show defaults (like pathscale) */
if (!strcmp(argv[0]+1, "show-defaults")) {
for (itr = 0; itr < COUNT_FLAGS; ++itr) {
if (!OPTS_FLAG(itr))
continue;
memset(buffer, 0, sizeof(buffer));
util_strtononcmd(opts_flag_list[itr].name, buffer, strlen(opts_flag_list[itr].name) + 1);
con_out("-f%s ", buffer);
}
for (itr = 0; itr < COUNT_WARNINGS; ++itr) {
if (!OPTS_WARN(itr))
continue;
memset(buffer, 0, sizeof(buffer));
util_strtononcmd(opts_warn_list[itr].name, buffer, strlen(opts_warn_list[itr].name) + 1);
con_out("-W%s ", buffer);
}
con_out("\n");
exit(0);
}
if (!strcmp(argv[0]+1, "debug")) {
OPTS_OPTION_BOOL(OPTION_DEBUG) = true;
continue;
}
if (!strcmp(argv[0]+1, "dump")) {
OPTS_OPTION_BOOL(OPTION_DUMP) = true;
continue;
}
if (!strcmp(argv[0]+1, "dumpfin")) {
OPTS_OPTION_BOOL(OPTION_DUMPFIN) = true;
continue;
}
if (!strcmp(argv[0]+1, "nocolor")) {
con_color(0);
continue;
}
if (!strcmp(argv[0]+1, "coverage")) {
OPTS_OPTION_BOOL(OPTION_COVERAGE) = true;
continue;
}
switch (argv[0][1]) {
/* -h, show usage but exit with 0 */
case 'h':
usage();
exit(0);
/* break; never reached because of exit(0) */
case 'v':
version();
exit(0);
case 'E':
OPTS_OPTION_BOOL(OPTION_PP_ONLY) = true;
opts_set(opts.flags, FTEPP_PREDEFS, true); /* predefs on for -E */
break;
/* debug turns on -flno */
case 'g':
opts_setflag("LNO", true);
OPTS_OPTION_BOOL(OPTION_G) = true;
break;
case 'q':
OPTS_OPTION_BOOL(OPTION_QUIET) = true;
break;
case 'D':
if (!strlen(argv[0]+2)) {
con_err("expected name after -D\n");
exit(0);
}
if (!(argarg = strchr(argv[0] + 2, '='))) {
macro.name = util_strdup(argv[0]+2);
macro.value = nullptr;
} else {
*argarg='\0'; /* terminate for name */
macro.name = util_strdup(argv[0]+2);
macro.value = util_strdup(argarg+1);
}
vec_push(ppems, macro);
break;
/* handle all -fflags */
case 'f':
util_strtocmd(argv[0]+2, argv[0]+2, strlen(argv[0]+2)+1);
if (!strcmp(argv[0]+2, "HELP") || *(argv[0]+2) == '?') {
con_out("Possible flags:\n\n");
for (itr = 0; itr < COUNT_FLAGS; ++itr) {
util_strtononcmd(opts_flag_list[itr].name, buffer, sizeof(buffer));
con_out(" -f%s\n", buffer);
}
exit(0);
}
else if (!strncmp(argv[0]+2, "NO_", 3)) {
if (!opts_setflag(argv[0]+5, false)) {
con_out("unknown flag: %s\n", argv[0]+2);
return false;
}
}
else if (!opts_setflag(argv[0]+2, true)) {
con_out("unknown flag: %s\n", argv[0]+2);
return false;
}
break;
case 'W':
util_strtocmd(argv[0]+2, argv[0]+2, strlen(argv[0]+2)+1);
if (!strcmp(argv[0]+2, "HELP") || *(argv[0]+2) == '?') {
con_out("Possible warnings:\n");
for (itr = 0; itr < COUNT_WARNINGS; ++itr) {
util_strtononcmd(opts_warn_list[itr].name, buffer, sizeof(buffer));
con_out(" -W%s\n", buffer);
if (itr == WARN_DEBUG)
con_out(" Warnings included by -Wall:\n");
}
exit(0);
}
else if (!strcmp(argv[0]+2, "NO_ERROR") ||
!strcmp(argv[0]+2, "NO_ERROR_ALL"))
{
for (itr = 0; itr < GMQCC_ARRAY_COUNT(opts.werror); ++itr)
opts.werror[itr] = 0;
break;
}
else if (!strcmp(argv[0]+2, "ERROR") ||
!strcmp(argv[0]+2, "ERROR_ALL"))
{
opts_backup_non_Werror_all();
for (itr = 0; itr < GMQCC_ARRAY_COUNT(opts.werror); ++itr)
opts.werror[itr] = 0xFFFFFFFFL;
opts_restore_non_Werror_all();
break;
}
else if (!strcmp(argv[0]+2, "NONE")) {
for (itr = 0; itr < GMQCC_ARRAY_COUNT(opts.warn); ++itr)
opts.warn[itr] = 0;
break;
}
else if (!strcmp(argv[0]+2, "ALL")) {
opts_backup_non_Wall();
for (itr = 0; itr < GMQCC_ARRAY_COUNT(opts.warn); ++itr)
opts.warn[itr] = 0xFFFFFFFFL;
opts_restore_non_Wall();
break;
}
else if (!strncmp(argv[0]+2, "ERROR_", 6)) {
if (!opts_setwerror(argv[0]+8, true)) {
con_out("unknown warning: %s\n", argv[0]+2);
return false;
}
}
else if (!strncmp(argv[0]+2, "NO_ERROR_", 9)) {
if (!opts_setwerror(argv[0]+11, false)) {
con_out("unknown warning: %s\n", argv[0]+2);
return false;
}
}
else if (!strncmp(argv[0]+2, "NO_", 3)) {
if (!opts_setwarn(argv[0]+5, false)) {
con_out("unknown warning: %s\n", argv[0]+2);
return false;
}
}
else if (!opts_setwarn(argv[0]+2, true)) {
con_out("unknown warning: %s\n", argv[0]+2);
return false;
}
break;
case 'O':
if (!options_witharg(&argc, &argv, &argarg)) {
con_out("option -O requires a numerical argument, or optimization name with an optional 'no-' prefix\n");
return false;
}
if (util_isdigit(argarg[0])) {
uint32_t val = (uint32_t)strtol(argarg, nullptr, 10);
OPTS_OPTION_U32(OPTION_O) = val;
opts_setoptimlevel(val);
} else {
util_strtocmd(argarg, argarg, strlen(argarg)+1);
if (!strcmp(argarg, "HELP")) {
con_out("Possible optimizations:\n");
for (itr = 0; itr < COUNT_OPTIMIZATIONS; ++itr) {
util_strtononcmd(opts_opt_list[itr].name, buffer, sizeof(buffer));
con_out(" -O%-20s (-O%u)\n", buffer, opts_opt_oflag[itr]);
}
exit(0);
}
else if (!strcmp(argarg, "ALL"))
opts_setoptimlevel(OPTS_OPTION_U32(OPTION_O) = 9999);
else if (!strncmp(argarg, "NO_", 3)) {
/* constant folding cannot be turned off for obvious reasons */
if (!strcmp(argarg, "NO_CONST_FOLD") || !opts_setoptim(argarg+3, false)) {
con_out("unknown optimization: %s\n", argarg+3);
return false;
}
}
else {
if (!opts_setoptim(argarg, true)) {
con_out("unknown optimization: %s\n", argarg);
return false;
}
}
}
break;
case 'o':
if (!options_witharg(&argc, &argv, &argarg)) {
con_out("option -o requires an argument: the output file name\n");
return false;
}
OPTS_OPTION_STR(OPTION_OUTPUT) = argarg;
opts_output_wasset = true;
break;
case 'a':
case 's':
item.type = argv[0][1] == 'a' ? TYPE_ASM : TYPE_SRC;
if (!options_witharg(&argc, &argv, &argarg)) {
con_out("option -a requires a filename %s\n",
(argv[0][1] == 'a' ? "containing QC-asm" : "containing a progs.src formatted list"));
return false;
}
item.filename = argarg;
vec_push(items, item);
if (item.type == TYPE_SRC) {
*has_progs_src = true;
}
break;
case '-':
if (!argv[0][2]) {
/* anything following -- is considered a non-option argument */
argend = true;
break;
}
/* All long options without arguments */
else if (!strcmp(argv[0]+2, "help")) {
usage();
exit(0);
}
else if (!strcmp(argv[0]+2, "version")) {
version();
exit(0);
}
else if (!strcmp(argv[0]+2, "quiet")) {
OPTS_OPTION_BOOL(OPTION_QUIET) = true;
break;
}
else if (!strcmp(argv[0]+2, "add-info")) {
OPTS_OPTION_BOOL(OPTION_ADD_INFO) = true;
break;
}
else {
/* All long options with arguments */
if (options_long_witharg("output", &argc, &argv, &argarg)) {
OPTS_OPTION_STR(OPTION_OUTPUT) = argarg;
opts_output_wasset = true;
} else {
con_out("Unknown parameter: %s\n", argv[0]);
return false;
}
}
break;
default:
con_out("Unknown parameter: %s\n", argv[0]);
return false;
}
}
else
{
/* it's a QC filename */
item.filename = argv[0];
item.type = TYPE_QC;
vec_push(items, item);
}
}
opts_ini_init(config);
return true;
}
/* returns the line number, or -1 on error */
static bool progs_nextline(char **out, size_t *alen, FILE *src) {
int len;
char *line;
char *start;
char *end;
line = *out;
len = util_getline(&line, alen, src);
if (len == -1)
return false;
/* start at first non-blank */
for (start = line; util_isspace(*start); ++start) {}
/* end at the first non-blank */
for (end = start; *end && !util_isspace(*end); ++end) {}
*out = line;
/* move the actual filename to the beginning */
while (start != end) {
*line++ = *start++;
}
*line = 0;
return true;
}
int main(int argc, char **argv) {
size_t itr;
int retval = 0;
bool operators_free = false;
bool has_progs_src = false;
FILE *outfile = nullptr;
parser_t *parser = nullptr;
ftepp_t *ftepp = nullptr;
app_name = argv[0];
con_init ();
opts_init("progs.dat", COMPILER_QCC, (1024 << 3));
util_seed(time(0));
if (!options_parse(argc, argv, &has_progs_src)) {
return usage();
}
if (OPTS_FLAG(TRUE_EMPTY_STRINGS) && OPTS_FLAG(FALSE_EMPTY_STRINGS)) {
con_err("-ftrue-empty-strings and -ffalse-empty-strings are mutually exclusive");
exit(EXIT_FAILURE);
}
/* the standard decides which set of operators to use */
if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_GMQCC) {
operators = c_operators;
operator_count = GMQCC_ARRAY_COUNT(c_operators);
} else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_FTEQCC) {
operators = fte_operators;
operator_count = GMQCC_ARRAY_COUNT(fte_operators);
} else {
operators = qcc_operators;
operator_count = GMQCC_ARRAY_COUNT(qcc_operators);
}
if (operators == fte_operators) {
/* fix ternary? */
if (OPTS_FLAG(CORRECT_TERNARY)) {
oper_info *newops;
if (operators[operator_count-2].id != opid1(',') ||
operators[operator_count-1].id != opid2(':','?'))
{
con_err("internal error: operator precedence table wasn't updated correctly!\n");
exit(EXIT_FAILURE);
}
operators_free = true;
newops = (oper_info*)mem_a(sizeof(operators[0]) * operator_count);
memcpy(newops, operators, sizeof(operators[0]) * operator_count);
memcpy(&newops[operator_count-2], &operators[operator_count-1], sizeof(newops[0]));
memcpy(&newops[operator_count-1], &operators[operator_count-2], sizeof(newops[0]));
newops[operator_count-2].prec = newops[operator_count-1].prec+1;
operators = newops;
}
}
if (OPTS_OPTION_BOOL(OPTION_DUMP)) {
for (itr = 0; itr < COUNT_FLAGS; ++itr)
con_out("Flag %s = %i\n", opts_flag_list[itr].name, OPTS_FLAG(itr));
for (itr = 0; itr < COUNT_WARNINGS; ++itr)
con_out("Warning %s = %i\n", opts_warn_list[itr].name, OPTS_WARN(itr));
con_out("output = %s\n", OPTS_OPTION_STR(OPTION_OUTPUT));
con_out("optimization level = %u\n", OPTS_OPTION_U32(OPTION_O));
con_out("standard = %u\n", OPTS_OPTION_U32(OPTION_STANDARD));
}
if (OPTS_OPTION_BOOL(OPTION_PP_ONLY)) {
if (opts_output_wasset) {
outfile = fopen(OPTS_OPTION_STR(OPTION_OUTPUT), "wb");
if (!outfile) {
con_err("failed to open `%s` for writing\n", OPTS_OPTION_STR(OPTION_OUTPUT));
retval = 1;
goto cleanup;
}
}
else {
outfile = con_default_out();
}
}
if (!OPTS_OPTION_BOOL(OPTION_PP_ONLY)) {
if (!(parser = parser_create())) {
con_err("failed to initialize parser\n");
retval = 1;
goto cleanup;
}
}
if (OPTS_OPTION_BOOL(OPTION_PP_ONLY) || OPTS_FLAG(FTEPP)) {
if (!(ftepp = ftepp_create())) {
con_err("failed to initialize parser\n");
retval = 1;
goto cleanup;
}
}
/* add macros */
if (OPTS_OPTION_BOOL(OPTION_PP_ONLY) || OPTS_FLAG(FTEPP)) {
for (itr = 0; itr < vec_size(ppems); itr++) {
ftepp_add_macro(ftepp, ppems[itr].name, ppems[itr].value);
mem_d(ppems[itr].name);
/* can be null */
if (ppems[itr].value)
mem_d(ppems[itr].value);
}
}
if (!vec_size(items) && !has_progs_src) {
FILE *fp = fopen(OPTS_OPTION_STR(OPTION_PROGSRC), "rb");
if (fp) {
has_progs_src = true;
}
fclose(fp);
}
if (has_progs_src) {
FILE *src;
char *line = nullptr;
size_t linelen = 0;
bool has_first_line = false;
src = fopen(OPTS_OPTION_STR(OPTION_PROGSRC), "rb");
if (!src) {
con_err("failed to open `%s` for reading\n", OPTS_OPTION_STR(OPTION_PROGSRC));
retval = 1;
goto cleanup;
}
while (progs_nextline(&line, &linelen, src)) {
argitem item;
if (!line[0] || (line[0] == '/' && line[1] == '/')) {
continue;
}
if (has_first_line) {
item.filename = util_strdup(line);
item.type = TYPE_QC;
vec_push(items, item);
} else {
if (!opts_output_wasset) {
OPTS_OPTION_DUP(OPTION_OUTPUT) = util_strdup(line);
}
has_first_line = true;
}
}
fclose(src);
mem_d(line);
}
if (vec_size(items)) {
if (!OPTS_OPTION_BOOL(OPTION_QUIET) &&
!OPTS_OPTION_BOOL(OPTION_PP_ONLY))
{
con_out("Mode: %s\n", (has_progs_src ? "progs.src" : "manual"));
con_out("There are %lu items to compile:\n", (unsigned long)vec_size(items));
}
for (itr = 0; itr < vec_size(items); ++itr) {
if (!OPTS_OPTION_BOOL(OPTION_QUIET) &&
!OPTS_OPTION_BOOL(OPTION_PP_ONLY))
{
con_out(" item: %s (%s)\n",
items[itr].filename,
( (items[itr].type == TYPE_QC ? "qc" :
(items[itr].type == TYPE_ASM ? "asm" :
(items[itr].type == TYPE_SRC ? "progs.src" :
("unknown"))))));
}
if (items[itr].type == TYPE_SRC) {
continue;
}
if (OPTS_OPTION_BOOL(OPTION_PP_ONLY)) {
const char *out;
if (!ftepp_preprocess_file(ftepp, items[itr].filename)) {
retval = 1;
goto cleanup;
}
out = ftepp_get(ftepp);
if (out)
fprintf(outfile, "%s", out);
ftepp_flush(ftepp);
}
else {
if (OPTS_FLAG(FTEPP)) {
const char *data;
if (!ftepp_preprocess_file(ftepp, items[itr].filename)) {
retval = 1;
goto cleanup;
}
data = ftepp_get(ftepp);
if (vec_size(data)) {
if (!parser_compile_string(parser, items[itr].filename, data, vec_size(data))) {
retval = 1;
goto cleanup;
}
}
ftepp_flush(ftepp);
}
else {
if (!parser_compile_file(parser, items[itr].filename)) {
retval = 1;
goto cleanup;
}
}
}
if (has_progs_src) {
mem_d(items[itr].filename);
items[itr].filename = nullptr;
}
}
ftepp_finish(ftepp);
ftepp = nullptr;
if (!OPTS_OPTION_BOOL(OPTION_PP_ONLY)) {
if (!parser_finish(parser, OPTS_OPTION_STR(OPTION_OUTPUT))) {
retval = 1;
goto cleanup;
}
}
}
cleanup:
if (ftepp)
ftepp_finish(ftepp);
con_close();
vec_free(items);
vec_free(ppems);
if (!OPTS_OPTION_BOOL(OPTION_PP_ONLY))
delete parser;
/* free allocated option strings */
for (itr = 0; itr < OPTION_COUNT; itr++)
if (OPTS_OPTION_DUPED(itr))
mem_d(OPTS_OPTION_STR(itr));
if (operators_free)
mem_d((void*)operators);
lex_cleanup();
if (!retval && compile_errors)
retval = 1;
return retval;
}