| /* |
| ** $Id: liolib.c,v 1.120 2001/07/16 18:48:31 roberto Exp roberto $ |
| ** Standard I/O (and system) library |
| ** See Copyright Notice in lua.h |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| |
| #define LUA_PRIVATE |
| #include "lua.h" |
| |
| #include "lauxlib.h" |
| #include "luadebug.h" |
| #include "lualib.h" |
| |
| |
| #ifndef OLD_ANSI |
| #include <errno.h> |
| #include <locale.h> |
| #endif |
| |
| |
| |
| #ifdef POPEN |
| /* FILE *popen(); |
| int pclose(); */ |
| #define CLOSEFILE(L, f) ((pclose(f) == -1) ? fclose(f) : 0) |
| #else |
| /* no support for popen */ |
| #define popen(x,y) NULL /* that is, popen always fails */ |
| #define CLOSEFILE(L, f) (fclose(f)) |
| #endif |
| |
| |
| #define INFILE 0 |
| #define OUTFILE 1 |
| #define NOFILE 2 |
| |
| #define FILEHANDLE l_s("FileHandle") |
| #define CLOSEDFILEHANDLE l_s("ClosedFileHandle") |
| |
| |
| static const l_char *const filenames[] = {l_s("_INPUT"), l_s("_OUTPUT")}; |
| static const l_char *const basicfiles[] = {l_s("_STDIN"), l_s("_STDOUT")}; |
| |
| |
| static int pushresult (lua_State *L, int i) { |
| if (i) { |
| lua_pushnumber(L, 1); |
| return 1; |
| } |
| else { |
| lua_pushnil(L); |
| lua_pushstring(L, strerror(errno)); |
| lua_pushnumber(L, errno); |
| return 3; |
| } |
| } |
| |
| |
| /* |
| ** {====================================================== |
| ** FILE Operations |
| ** ======================================================= |
| */ |
| |
| |
| #define checkfile(L,f) (strcmp(lua_type(L,(f)), FILEHANDLE) == 0) |
| |
| |
| static FILE *getopthandle (lua_State *L, int inout) { |
| FILE *p = (FILE *)lua_touserdata(L, 1); |
| if (p != NULL) { /* is it a userdata ? */ |
| if (!checkfile(L, 1)) { /* not a valid file handle? */ |
| if (strcmp(lua_type(L, 1), CLOSEDFILEHANDLE) == 0) |
| luaL_argerror(L, 1, l_s("file is closed")); |
| else |
| luaL_argerror(L, 1, l_s("(invalid value)")); |
| } |
| lua_pushvalue(L, 1); lua_remove(L, 1); /* move it to stack top */ |
| } |
| else { /* try global value */ |
| lua_getglobal(L, filenames[inout]); |
| if (!checkfile(L,-1)) |
| luaL_verror(L, l_s("global variable `%.10s' is not a valid file handle"), |
| filenames[inout]); |
| p = (FILE *)lua_touserdata(L, -1); |
| } |
| return p; /* leave handle at stack top to avoid GC */ |
| } |
| |
| |
| static void newfile (lua_State *L, FILE *f) { |
| lua_newuserdatabox(L, f); |
| lua_settag(L, lua_name2tag(L, FILEHANDLE)); |
| } |
| |
| |
| static void newfilewithname (lua_State *L, FILE *f, const l_char *name) { |
| newfile(L, f); |
| lua_setglobal(L, name); |
| } |
| |
| |
| static int setnewfile (lua_State *L, FILE *f, int inout) { |
| if (f == NULL) |
| return pushresult(L, 0); |
| else { |
| newfile(L, f); |
| if (inout != NOFILE) { |
| lua_pushvalue(L, -1); |
| lua_setglobal(L, filenames[inout]); |
| } |
| return 1; |
| } |
| } |
| |
| |
| static void resetfile (lua_State *L, int inout) { |
| lua_getglobal(L, basicfiles[inout]); |
| lua_setglobal(L, filenames[inout]); |
| } |
| |
| |
| static int io_close (lua_State *L) { |
| FILE *f = (FILE *)luaL_check_userdata(L, 1, FILEHANDLE); |
| int status = 1; |
| if (f != stdin && f != stdout && f != stderr) { |
| lua_settop(L, 1); /* make sure file is on top */ |
| lua_settag(L, lua_name2tag(L, CLOSEDFILEHANDLE)); |
| status = (CLOSEFILE(L, f) == 0); |
| } |
| return pushresult(L, status); |
| } |
| |
| |
| static int file_collect (lua_State *L) { |
| FILE *f = (FILE *)luaL_check_userdata(L, 1, FILEHANDLE); |
| if (f != stdin && f != stdout && f != stderr) |
| CLOSEFILE(L, f); |
| return 0; |
| } |
| |
| |
| static int io_open (lua_State *L) { |
| FILE *f = fopen(luaL_check_string(L, 1), luaL_check_string(L, 2)); |
| return setnewfile(L, f, NOFILE); |
| } |
| |
| |
| static int io_tmpfile (lua_State *L) { |
| return setnewfile(L, tmpfile(), NOFILE); |
| } |
| |
| |
| |
| static int io_fromto (lua_State *L, int inout, const l_char *mode) { |
| FILE *current; |
| if (lua_isnull(L, 1)) { |
| getopthandle(L, inout); |
| resetfile(L, inout); |
| return io_close(L); |
| } |
| else { |
| const l_char *s = luaL_check_string(L, 1); |
| current = (*s == l_c('|')) ? popen(s+1, mode) : fopen(s, mode); |
| return setnewfile(L, current, inout); |
| } |
| } |
| |
| |
| static int io_readfrom (lua_State *L) { |
| return io_fromto(L, INFILE, l_s("r")); |
| } |
| |
| |
| static int io_writeto (lua_State *L) { |
| return io_fromto(L, OUTFILE, l_s("w")); |
| } |
| |
| |
| static int io_appendto (lua_State *L) { |
| FILE *current = fopen(luaL_check_string(L, 1), l_s("a")); |
| return setnewfile(L, current, OUTFILE); |
| } |
| |
| |
| |
| /* |
| ** {====================================================== |
| ** READ |
| ** ======================================================= |
| */ |
| |
| |
| #ifndef LUA_MAXUNTIL |
| #define LUA_MAXUNTIL 100 |
| #endif |
| |
| |
| /* |
| ** Knuth-Morris-Pratt algorithm for string searching |
| ** (based on `Algorithms in MODULA-3', Robert Sedgewick; |
| ** Addison-Wesley, 1993.) |
| */ |
| |
| static void prep_read_until (int next[], const l_char *p, int pl) { |
| int i = 0; |
| int j = -1; |
| next[0] = -1; |
| while (i < pl) { |
| if (j == -1 || p[i] == p[j]) { |
| i++; j++; next[i] = j; |
| } |
| else j = next[j]; |
| } |
| } |
| |
| |
| static int read_until (lua_State *L, FILE *f, const l_char *p, int pl) { |
| l_charint c; |
| int j; |
| int next[LUA_MAXUNTIL+1]; |
| luaL_Buffer b; |
| luaL_buffinit(L, &b); |
| prep_read_until(next, p, pl); |
| j = 0; |
| while ((c = getc(f)) != EOF) { |
| NoRead: |
| if (c == p[j]) { |
| j++; /* go to next char in pattern */ |
| if (j == pl) { /* complete match? */ |
| luaL_pushresult(&b); /* close buffer */ |
| return 1; /* always success */ |
| } |
| } |
| else if (j == 0) |
| luaL_putchar(&b, c); |
| else { /* match fail */ |
| luaL_addlstring(&b, p, j - next[j]); /* put failed part on result */ |
| j = next[j]; /* backtrack pattern index */ |
| goto NoRead; /* repeat without reading next char */ |
| } |
| } |
| /* end of file without a match */ |
| luaL_addlstring(&b, p, j); /* put failed part on result */ |
| luaL_pushresult(&b); /* close buffer */ |
| return (lua_strlen(L, -1) > 0); |
| } |
| |
| |
| static int read_number (lua_State *L, FILE *f) { |
| double d; |
| if (fscanf(f, l_s(LUA_NUMBER_SCAN), &d) == 1) { |
| lua_pushnumber(L, d); |
| return 1; |
| } |
| else return 0; /* read fails */ |
| } |
| |
| |
| static int test_eof (lua_State *L, FILE *f) { |
| l_charint c = getc(f); |
| ungetc(c, f); |
| lua_pushlstring(L, NULL, 0); |
| return (c != EOF); |
| } |
| |
| |
| static int read_chars (lua_State *L, FILE *f, size_t n) { |
| size_t rlen; /* how much to read */ |
| size_t nr; /* number of chars actually read */ |
| luaL_Buffer b; |
| luaL_buffinit(L, &b); |
| rlen = LUAL_BUFFERSIZE; /* try to read that much each time */ |
| do { |
| l_char *p = luaL_prepbuffer(&b); |
| if (rlen > n) rlen = n; /* cannot read more than asked */ |
| nr = fread(p, sizeof(l_char), rlen, f); |
| luaL_addsize(&b, nr); |
| n -= nr; /* still have to read `n' chars */ |
| } while (n > 0 && nr == rlen); /* until end of count or eof */ |
| luaL_pushresult(&b); /* close buffer */ |
| return (n == 0 || lua_strlen(L, -1) > 0); |
| } |
| |
| |
| static int io_read (lua_State *L) { |
| FILE *f = getopthandle(L, INFILE); |
| int nargs = lua_gettop(L) - 1; |
| int success; |
| int n; |
| if (nargs == 0) { /* no arguments? */ |
| success = read_until(L, f, l_s("\n"), 1); /* read until \n (a line) */ |
| n = 2; /* will return n-1 results */ |
| } |
| else { /* ensure stack space for all results and for auxlib's buffer */ |
| luaL_checkstack(L, nargs+LUA_MINSTACK, l_s("too many arguments")); |
| success = 1; |
| for (n = 1; n<=nargs && success; n++) { |
| if (lua_rawtag(L, n) == LUA_TNUMBER) { |
| size_t l = (size_t)lua_tonumber(L, n); |
| success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l); |
| } |
| else { |
| const l_char *p = lua_tostring(L, n); |
| if (!p || p[0] != l_c('*')) |
| lua_error(L, l_s("invalid `read' option")); |
| switch (p[1]) { |
| case l_c('n'): /* number */ |
| success = read_number(L, f); |
| break; |
| case l_c('l'): /* line */ |
| success = read_until(L, f, l_s("\n"), 1); /* read until \n */ |
| break; |
| case l_c('a'): /* file */ |
| read_chars(L, f, ~((size_t)0)); /* read MAX_SIZE_T chars */ |
| success = 1; /* always success */ |
| break; |
| case l_c('w'): /* word */ |
| lua_error(L, l_s("option `*w' is deprecated")); |
| break; |
| case l_c('u'): { /* read until */ |
| size_t pl = lua_strlen(L, n) - 2; |
| luaL_arg_check(L, 0 < pl && pl <= LUA_MAXUNTIL, n, |
| l_s("invalid read-until length")); |
| success = read_until(L, f, p+2, (int)pl); |
| break; |
| } |
| default: |
| luaL_argerror(L, n, l_s("invalid format")); |
| success = 0; /* to avoid warnings */ |
| } |
| } |
| } |
| } |
| if (!success) { |
| lua_pop(L, 1); /* remove last result */ |
| lua_pushnil(L); /* push nil instead */ |
| } |
| return n - 1; |
| } |
| |
| /* }====================================================== */ |
| |
| |
| static int io_write (lua_State *L) { |
| FILE *f = getopthandle(L, OUTFILE); |
| int nargs = lua_gettop(L)-1; |
| int arg; |
| int status = 1; |
| for (arg=1; arg<=nargs; arg++) { |
| if (lua_rawtag(L, arg) == LUA_TNUMBER) { |
| /* optimization: could be done exactly as for strings */ |
| status = status && |
| fprintf(f, l_s(LUA_NUMBER_FMT), lua_tonumber(L, arg)) > 0; |
| } |
| else { |
| size_t l; |
| const l_char *s = luaL_check_lstr(L, arg, &l); |
| status = status && (fwrite(s, sizeof(l_char), l, f) == l); |
| } |
| } |
| pushresult(L, status); |
| return 1; |
| } |
| |
| |
| static int io_seek (lua_State *L) { |
| static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END}; |
| static const l_char *const modenames[] = {l_s("set"), l_s("cur"), l_s("end"), NULL}; |
| FILE *f = (FILE *)luaL_check_userdata(L, 1, FILEHANDLE); |
| int op = luaL_findstring(luaL_opt_string(L, 2, l_s("cur")), modenames); |
| long offset = luaL_opt_long(L, 3, 0); |
| luaL_arg_check(L, op != -1, 2, l_s("invalid mode")); |
| op = fseek(f, offset, mode[op]); |
| if (op) |
| return pushresult(L, 0); /* error */ |
| else { |
| lua_pushnumber(L, ftell(f)); |
| return 1; |
| } |
| } |
| |
| |
| static int io_flush (lua_State *L) { |
| FILE *f = (lua_isnull(L, 1)) ? (FILE *)NULL : |
| (FILE *)luaL_check_userdata(L, 1, FILEHANDLE); |
| return pushresult(L, fflush(f) == 0); |
| } |
| |
| /* }====================================================== */ |
| |
| |
| /* |
| ** {====================================================== |
| ** Other O.S. Operations |
| ** ======================================================= |
| */ |
| |
| static int io_execute (lua_State *L) { |
| lua_pushnumber(L, system(luaL_check_string(L, 1))); |
| return 1; |
| } |
| |
| |
| static int io_remove (lua_State *L) { |
| return pushresult(L, remove(luaL_check_string(L, 1)) == 0); |
| } |
| |
| |
| static int io_rename (lua_State *L) { |
| return pushresult(L, rename(luaL_check_string(L, 1), |
| luaL_check_string(L, 2)) == 0); |
| } |
| |
| |
| static int io_tmpname (lua_State *L) { |
| l_char buff[L_tmpnam]; |
| if (tmpnam(buff) != buff) |
| lua_error(L, l_s("unable to generate a unique filename")); |
| lua_pushstring(L, buff); |
| return 1; |
| } |
| |
| |
| |
| static int io_getenv (lua_State *L) { |
| lua_pushstring(L, getenv(luaL_check_string(L, 1))); /* if NULL push nil */ |
| return 1; |
| } |
| |
| |
| static int io_clock (lua_State *L) { |
| lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC); |
| return 1; |
| } |
| |
| |
| /* |
| ** {====================================================== |
| ** Time/Date operations |
| ** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S, |
| ** wday=%w+1, yday=%j, isdst=? } |
| ** ======================================================= |
| */ |
| |
| static void setfield (lua_State *L, const l_char *key, int value) { |
| lua_pushstring(L, key); |
| lua_pushnumber(L, value); |
| lua_rawset(L, -3); |
| } |
| |
| |
| static int getfield (lua_State *L, const l_char *key, int d) { |
| int res; |
| lua_pushstring(L, key); |
| lua_rawget(L, -2); |
| if (lua_isnumber(L, -1)) |
| res = (int)lua_tonumber(L, -1); |
| else { |
| if (d == -2) |
| luaL_verror(L, l_s("field `%.20s' missing in date table"), key); |
| res = d; |
| } |
| lua_pop(L, 1); |
| return res; |
| } |
| |
| |
| static int io_date (lua_State *L) { |
| const l_char *s = luaL_opt_string(L, 1, l_s("%c")); |
| time_t t = (time_t)luaL_opt_number(L, 2, -1); |
| struct tm *stm; |
| if (t == (time_t)-1) /* no time given? */ |
| t = time(NULL); /* use current time */ |
| if (*s == l_c('!')) { /* UTC? */ |
| stm = gmtime(&t); |
| s++; /* skip `!' */ |
| } |
| else |
| stm = localtime(&t); |
| if (stm == NULL) /* invalid date? */ |
| lua_pushnil(L); |
| else if (strcmp(s, l_s("*t")) == 0) { |
| lua_newtable(L); |
| setfield(L, l_s("sec"), stm->tm_sec); |
| setfield(L, l_s("min"), stm->tm_min); |
| setfield(L, l_s("hour"), stm->tm_hour); |
| setfield(L, l_s("day"), stm->tm_mday); |
| setfield(L, l_s("month"), stm->tm_mon+1); |
| setfield(L, l_s("year"), stm->tm_year+1900); |
| setfield(L, l_s("wday"), stm->tm_wday+1); |
| setfield(L, l_s("yday"), stm->tm_yday+1); |
| setfield(L, l_s("isdst"), stm->tm_isdst); |
| } |
| else { |
| l_char b[256]; |
| if (strftime(b, sizeof(b), s, stm)) |
| lua_pushstring(L, b); |
| else |
| lua_error(L, l_s("invalid `date' format")); |
| } |
| return 1; |
| } |
| |
| |
| static int io_time (lua_State *L) { |
| if (lua_isnull(L, 1)) /* called without args? */ |
| lua_pushnumber(L, time(NULL)); /* return current time */ |
| else { |
| time_t t; |
| struct tm ts; |
| luaL_checktype(L, 1, LUA_TTABLE); |
| lua_settop(L, 1); /* make sure table is at the top */ |
| ts.tm_sec = getfield(L, l_s("sec"), 0); |
| ts.tm_min = getfield(L, l_s("min"), 0); |
| ts.tm_hour = getfield(L, l_s("hour"), 12); |
| ts.tm_mday = getfield(L, l_s("day"), -2); |
| ts.tm_mon = getfield(L, l_s("month"), -2)-1; |
| ts.tm_year = getfield(L, l_s("year"), -2)-1900; |
| ts.tm_isdst = getfield(L, l_s("isdst"), -1); |
| t = mktime(&ts); |
| if (t == (time_t)-1) |
| lua_pushnil(L); |
| else |
| lua_pushnumber(L, t); |
| } |
| return 1; |
| } |
| |
| |
| static int io_difftime (lua_State *L) { |
| lua_pushnumber(L, difftime((time_t)luaL_check_number(L, 1), |
| (time_t)luaL_opt_number(L, 2, 0))); |
| return 1; |
| } |
| |
| /* }====================================================== */ |
| |
| |
| static int io_setloc (lua_State *L) { |
| static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, |
| LC_NUMERIC, LC_TIME}; |
| static const l_char *const catnames[] = {l_s("all"), l_s("collate"), l_s("ctype"), l_s("monetary"), |
| l_s("numeric"), l_s("time"), NULL}; |
| int op = luaL_findstring(luaL_opt_string(L, 2, l_s("all")), catnames); |
| luaL_arg_check(L, op != -1, 2, l_s("invalid option")); |
| lua_pushstring(L, setlocale(cat[op], luaL_check_string(L, 1))); |
| return 1; |
| } |
| |
| |
| static int io_exit (lua_State *L) { |
| exit(luaL_opt_int(L, 1, EXIT_SUCCESS)); |
| return 0; /* to avoid warnings */ |
| } |
| |
| /* }====================================================== */ |
| |
| |
| |
| static int io_debug (lua_State *L) { |
| for (;;) { |
| l_char buffer[250]; |
| fprintf(stderr, l_s("lua_debug> ")); |
| if (fgets(buffer, sizeof(buffer), stdin) == 0 || |
| strcmp(buffer, l_s("cont\n")) == 0) |
| return 0; |
| lua_dostring(L, buffer); |
| lua_settop(L, 0); /* remove eventual returns */ |
| } |
| } |
| |
| |
| #define LEVELS1 12 /* size of the first part of the stack */ |
| #define LEVELS2 10 /* size of the second part of the stack */ |
| |
| static int errorfb (lua_State *L) { |
| int level = 1; /* skip level 0 (it's this function) */ |
| int firstpart = 1; /* still before eventual `...' */ |
| lua_Debug ar; |
| luaL_Buffer b; |
| luaL_buffinit(L, &b); |
| luaL_addstring(&b, l_s("error: ")); |
| luaL_addstring(&b, luaL_check_string(L, 1)); |
| luaL_addstring(&b, l_s("\n")); |
| while (lua_getstack(L, level++, &ar)) { |
| l_char buff[120]; /* enough to fit following `sprintf's */ |
| if (level == 2) |
| luaL_addstring(&b, l_s("stack traceback:\n")); |
| else if (level > LEVELS1 && firstpart) { |
| /* no more than `LEVELS2' more levels? */ |
| if (!lua_getstack(L, level+LEVELS2, &ar)) |
| level--; /* keep going */ |
| else { |
| luaL_addstring(&b, l_s(" ...\n")); /* too many levels */ |
| while (lua_getstack(L, level+LEVELS2, &ar)) /* find last levels */ |
| level++; |
| } |
| firstpart = 0; |
| continue; |
| } |
| sprintf(buff, l_s("%4d: "), level-1); |
| luaL_addstring(&b, buff); |
| lua_getinfo(L, l_s("Snl"), &ar); |
| switch (*ar.namewhat) { |
| case l_c('g'): case l_c('l'): /* global, local */ |
| sprintf(buff, l_s("function `%.50s'"), ar.name); |
| break; |
| case l_c('f'): /* field */ |
| sprintf(buff, l_s("method `%.50s'"), ar.name); |
| break; |
| case l_c('t'): /* tag method */ |
| sprintf(buff, l_s("`%.50s' tag method"), ar.name); |
| break; |
| default: { |
| if (*ar.what == l_c('m')) /* main? */ |
| sprintf(buff, l_s("main of %.70s"), ar.short_src); |
| else if (*ar.what == l_c('C')) /* C function? */ |
| sprintf(buff, l_s("%.70s"), ar.short_src); |
| else |
| sprintf(buff, l_s("function <%d:%.70s>"), ar.linedefined, ar.short_src); |
| ar.source = NULL; /* do not print source again */ |
| } |
| } |
| luaL_addstring(&b, buff); |
| if (ar.currentline > 0) { |
| sprintf(buff, l_s(" at line %d"), ar.currentline); |
| luaL_addstring(&b, buff); |
| } |
| if (ar.source) { |
| sprintf(buff, l_s(" [%.70s]"), ar.short_src); |
| luaL_addstring(&b, buff); |
| } |
| luaL_addstring(&b, l_s("\n")); |
| } |
| luaL_pushresult(&b); |
| lua_getglobal(L, l_s(LUA_ALERT)); |
| if (lua_isfunction(L, -1)) { /* avoid loop if _ALERT is not defined */ |
| lua_pushvalue(L, -2); /* error message */ |
| lua_rawcall(L, 1, 0); |
| } |
| return 0; |
| } |
| |
| |
| |
| static const luaL_reg iolib[] = { |
| {l_s("appendto"), io_appendto}, |
| {l_s("clock"), io_clock}, |
| {l_s("closefile"), io_close}, |
| {l_s("date"), io_date}, |
| {l_s("debug"), io_debug}, |
| {l_s("difftime"), io_difftime}, |
| {l_s("execute"), io_execute}, |
| {l_s("exit"), io_exit}, |
| {l_s("flush"), io_flush}, |
| {l_s("getenv"), io_getenv}, |
| {l_s("openfile"), io_open}, |
| {l_s("read"), io_read}, |
| {l_s("readfrom"), io_readfrom}, |
| {l_s("remove"), io_remove}, |
| {l_s("rename"), io_rename}, |
| {l_s("seek"), io_seek}, |
| {l_s("setlocale"), io_setloc}, |
| {l_s("time"), io_time}, |
| {l_s("tmpfile"), io_tmpfile}, |
| {l_s("tmpname"), io_tmpname}, |
| {l_s("write"), io_write}, |
| {l_s("writeto"), io_writeto}, |
| {l_s(LUA_ERRORMESSAGE), errorfb} |
| }; |
| |
| |
| LUALIB_API int lua_iolibopen (lua_State *L) { |
| int iotag = lua_newtype(L, FILEHANDLE, LUA_TUSERDATA); |
| lua_newtype(L, CLOSEDFILEHANDLE, LUA_TUSERDATA); |
| luaL_openl(L, iolib); |
| /* predefined file handles */ |
| newfilewithname(L, stdin, basicfiles[INFILE]); |
| newfilewithname(L, stdout, basicfiles[OUTFILE]); |
| newfilewithname(L, stderr, l_s("_STDERR")); |
| resetfile(L, INFILE); |
| resetfile(L, OUTFILE); |
| /* close files when collected */ |
| lua_pushcfunction(L, file_collect); |
| lua_settagmethod(L, iotag, l_s("gc")); |
| return 0; |
| } |
| |