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/*
* Copyright (C) 2015 Giacomo Tesio <giacomo@tesio.it>
*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#pragma lib "libc.a"
#pragma src "/sys/src/libc"
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
#define offsetof(s, m) (uintptr_t)(&(((s*)0)->m))
#define assert(x) if(x){}else _assert(#x)
extern void (*_abort)(void);
#define abort() if(_abort){_abort();}else{while(*(int*)0);}
/*
* mem routines
*/
extern void* memccpy(void*, const void*, int, uint32_t);
extern void* memset(void*, int, uint32_t);
extern int memcmp(const void*, const void*, uint32_t);
extern void* memcpy(void*, const void*, size_t);
extern void* memmove(void*, const void*, size_t);
extern void* memchr(const void*, int, uint32_t);
/*
* string routines
*/
extern char* strcat(char*, const char*);
extern char* strchr(const char*, int);
extern int strcmp(const char*, const char*);
extern char* strcpy(char*, const char*);
extern char* strecpy(char*, char *, const char*);
extern char* strdup(const char*);
extern char* strncat(char*, const char*, int32_t);
extern char* strncpy(char*, const char*, uint32_t);
extern int strncmp(const char*, const char*, int32_t);
extern char* strpbrk(const char*, const char*);
extern char* strrchr(const char*, int);
extern char* strtok(char*, char*);
extern int32_t strlen(const char*);
extern int32_t strspn(const char*, const char*);
extern int32_t strcspn(const char*, const char*);
extern char* strstr(const char*, const char*);
extern int cistrncmp(const char*, const char*, int);
extern int cistrcmp(const char*, const char*);
extern char* cistrstr(const char*, const char*);
extern int tokenize(char*, char**, int);
enum
{
UTFmax = 4, /* maximum bytes per rune */
Runesync = 0x80, /* cannot represent part of a UTF sequence (<) */
Runeself = 0x80, /* rune and UTF sequences are the same (<) */
Runeerror = 0xFFFD, /* decoding error in UTF */
Runemax = 0x10FFFF, /* 21-bit rune */
Runemask = 0x1FFFFF, /* bits used by runes (see grep) */
};
/*
* rune routines
*/
extern int runetochar(char*, const Rune*);
extern int chartorune(Rune*, const char*);
extern int runelen(Rune);
extern int runenlen(const Rune*, int);
extern int fullrune(const char*, int);
extern int utflen(const char*);
extern int utfnlen(const char*, int32_t);
extern char* utfrune(const char*, Rune);
extern char* utfrrune(const char*, Rune);
extern char* utfutf(const char*, const char*);
extern char* utfecpy(char*, char *, const char*);
extern Rune* runestrcat(Rune*, const Rune*);
extern Rune* runestrchr(const Rune*, Rune);
extern int runestrcmp(const Rune*, const Rune*);
extern Rune* runestrcpy(Rune*, const Rune*);
extern Rune* runestrncpy(Rune*, const Rune*, int32_t);
extern Rune* runestrecpy(Rune*, Rune*, const Rune*);
extern Rune* runestrdup(const Rune*);
extern Rune* runestrncat(Rune*, const Rune*, int32_t);
extern int runestrncmp(const Rune*, const Rune*, int32_t);
extern Rune* runestrrchr(const Rune*, Rune);
extern int32_t runestrlen(const Rune*);
extern Rune* runestrstr(const Rune*, const Rune*);
extern Rune tolowerrune(Rune);
extern Rune totitlerune(Rune);
extern Rune toupperrune(Rune);
extern Rune tobaserune(Rune);
extern int isalpharune(Rune);
extern int isbaserune(Rune);
extern int isdigitrune(Rune);
extern int islowerrune(Rune);
extern int isspacerune(Rune);
extern int istitlerune(Rune);
extern int isupperrune(Rune);
/*
* malloc
*/
extern void* malloc(size_t);
extern void* mallocz(uint32_t, int);
extern void free(void*);
extern uint32_t msize(void*);
extern void* mallocalign(uint32_t, uint32_t, int32_t, uint32_t);
extern void* calloc(uint32_t, size_t);
extern void* realloc(void*, size_t);
void setmalloctag(void*, uintptr_t);
void setrealloctag(void*, uintptr_t);
uintptr_t getmalloctag(void*);
uintptr_t getrealloctag(void*);
void* malloctopoolblock(void*);
/*
* print routines
*/
typedef struct Fmt Fmt;
struct Fmt{
uint8_t runes; /* output buffer is runes or chars? */
void *start; /* of buffer */
void *to; /* current place in the buffer */
void *stop; /* end of the buffer; overwritten if flush fails */
int (*flush)(Fmt *); /* called when to == stop */
void *farg; /* to make flush a closure */
int nfmt; /* num chars formatted so far */
va_list args; /* args passed to dofmt */
int r; /* % format Rune */
int width;
int prec;
uint32_t flags;
};
enum{
FmtWidth = 1,
FmtLeft = FmtWidth << 1,
FmtPrec = FmtLeft << 1,
FmtSharp = FmtPrec << 1,
FmtSpace = FmtSharp << 1,
FmtSign = FmtSpace << 1,
FmtZero = FmtSign << 1,
FmtUnsigned = FmtZero << 1,
FmtShort = FmtUnsigned << 1,
FmtLong = FmtShort << 1,
FmtVLong = FmtLong << 1,
FmtComma = FmtVLong << 1,
FmtByte = FmtComma << 1,
FmtFlag = FmtByte << 1
};
extern int print(const char*, ...);
extern char* seprint(char*, char*, const char*, ...);
extern char* vseprint(char*, char*, const char*, va_list);
extern int snprint(char*, int, const char*, ...);
extern int vsnprint(char*, int, const char*, va_list);
extern char* smprint(const char*, ...);
extern char* vsmprint(const char*, va_list);
extern int sprint(char*, const char*, ...);
extern int fprint(int, const char*, ...);
extern int vfprint(int, const char*, va_list);
extern int runesprint(Rune*, const char*, ...);
extern int runesnprint(Rune*, int, const char*, ...);
extern int runevsnprint(Rune*, int, const char*, va_list);
extern Rune* runeseprint(Rune*, Rune*, const char*, ...);
extern Rune* runevseprint(Rune*, Rune*, const char*, va_list);
extern Rune* runesmprint(const char*, ...);
extern Rune* runevsmprint(const char*, va_list);
extern int fmtfdinit(Fmt*, int, char*, int);
extern int fmtfdflush(Fmt*);
extern int fmtstrinit(Fmt*);
extern char* fmtstrflush(Fmt*);
extern int runefmtstrinit(Fmt*);
extern Rune* runefmtstrflush(Fmt*);
#pragma varargck argpos fmtprint 2
#pragma varargck argpos fprint 2
#pragma varargck argpos print 1
#pragma varargck argpos runeseprint 3
#pragma varargck argpos runesmprint 1
#pragma varargck argpos runesnprint 3
#pragma varargck argpos runesprint 2
#pragma varargck argpos seprint 3
#pragma varargck argpos smprint 1
#pragma varargck argpos snprint 3
#pragma varargck argpos sprint 2
#pragma varargck type "lld" vlong
#pragma varargck type "llo" vlong
#pragma varargck type "llx" vlong
#pragma varargck type "llb" vlong
#pragma varargck type "lld" uvlong
#pragma varargck type "llo" uvlong
#pragma varargck type "llx" uvlong
#pragma varargck type "llb" uvlong
#pragma varargck type "ld" long
#pragma varargck type "lo" long
#pragma varargck type "lx" long
#pragma varargck type "lb" long
#pragma varargck type "ld" ulong
#pragma varargck type "lo" ulong
#pragma varargck type "lx" ulong
#pragma varargck type "lb" ulong
#pragma varargck type "d" int
#pragma varargck type "o" int
#pragma varargck type "x" int
#pragma varargck type "c" int
#pragma varargck type "C" int
#pragma varargck type "b" int
#pragma varargck type "d" uint
#pragma varargck type "x" uint
#pragma varargck type "c" uint
#pragma varargck type "C" uint
#pragma varargck type "b" uint
#pragma varargck type "f" double
#pragma varargck type "e" double
#pragma varargck type "g" double
#pragma varargck type "s" char*
#pragma varargck type "q" char*
#pragma varargck type "S" Rune*
#pragma varargck type "Q" Rune*
#pragma varargck type "r" void
#pragma varargck type "%" void
#pragma varargck type "n" int*
#pragma varargck type "p" uintptr
#pragma varargck type "p" void*
#pragma varargck flag ','
#pragma varargck flag ' '
#pragma varargck flag 'h'
#pragma varargck type "<" void*
#pragma varargck type "[" void*
#pragma varargck type "H" void*
#pragma varargck type "lH" void*
extern int fmtinstall(int, int (*)(Fmt*));
extern int dofmt(Fmt*, const char*);
extern int dorfmt(Fmt*, const Rune*);
extern int fmtprint(Fmt*, const char*, ...);
extern int fmtvprint(Fmt*, const char*, va_list);
extern int fmtrune(Fmt*, int);
extern int fmtstrcpy(Fmt*, const char*);
extern int fmtrunestrcpy(Fmt*, const Rune*);
/*
* error string for %r
* supplied on per os basis, not part of fmt library
*/
extern int errfmt(Fmt *f);
/*
* quoted strings
*/
extern char *unquotestrdup(const char*);
extern Rune *unquoterunestrdup(const Rune*);
extern char *quotestrdup(const char*);
extern Rune *quoterunestrdup(const Rune*);
extern int quotestrfmt(Fmt*);
extern int quoterunestrfmt(Fmt*);
extern void quotefmtinstall(void);
extern int (*doquote)(int);
extern int needsrcquote(int);
/*
* random number
*/
extern void srand(int32_t);
extern int rand(void);
extern int nrand(int);
extern int32_t lrand(void);
extern int32_t lnrand(int32_t);
extern double frand(void);
extern uint32_t truerand(void); /* uses /dev/random */
extern uint32_t ntruerand(uint32_t); /* uses /dev/random */
/*
* math
*/
extern uint32_t getfcr(void);
extern void setfsr(uint32_t);
extern uint32_t getfsr(void);
extern void setfcr(uint32_t);
extern double NaN(void);
extern double Inf(int);
extern int isNaN(double);
extern int isInf(double, int);
extern uint32_t umuldiv(uint32_t, uint32_t, uint32_t);
extern int32_t muldiv(int32_t, int32_t, int32_t);
extern double pow(double, double);
extern double atan2(double, double);
extern double fabs(double);
extern double atan(double);
extern double log(double);
extern double log10(double);
extern double exp(double);
extern double floor(double);
extern double ceil(double);
extern double hypot(double, double);
extern double sin(double);
extern double cos(double);
extern double tan(double);
extern double asin(double);
extern double acos(double);
extern double sinh(double);
extern double cosh(double);
extern double tanh(double);
extern double sqrt(double);
extern double fmod(double, double);
#define HUGE 3.4028234e38
#define PIO2 1.570796326794896619231e0
#define PI (PIO2+PIO2)
/*
* Time-of-day
*/
typedef
struct Tm
{
int sec;
int min;
int hour;
int mday;
int mon;
int year;
int wday;
int yday;
char zone[4];
int tzoff;
} Tm;
extern Tm* gmtime(int32_t);
extern Tm* localtime(int32_t);
extern char* asctime(Tm*);
extern char* ctime(int32_t);
extern double cputime(void);
extern int32_t times(int32_t*);
extern int32_t tm2sec(Tm*);
extern int64_t nsec(void);
extern void cycles(uint64_t*); /* 64-bit value of the cycle counter if there is one, 0 if there isn't */
/*
* one-of-a-kind
*/
enum
{
PNPROC = 1,
PNGROUP = 2,
};
extern void _assert(const char*);
extern int abs(int);
extern int atexit(void(*)(void));
extern void atexitdont(void(*)(void));
extern int atnotify(int(*)(void*, char*), int);
extern double atof(const char*);
extern int atoi(const char*);
extern int32_t atol(const char*);
extern int64_t atoll(const char*);
extern double charstod(int(*)(void*), void*);
extern char* cleanname(char*);
extern int decrypt(void*, void*, int);
extern int encrypt(void*, void*, int);
extern int dec64(uint8_t*, int, const char*, int);
extern int enc64(char*, int, const uint8_t*, int);
extern int dec32(uint8_t*, int, const char*, int);
extern int enc32(char*, int, const uint8_t*, int);
extern int dec16(uint8_t*, int, const char*, int);
extern int enc16(char*, int, const uint8_t*, int);
extern int encodefmt(Fmt*);
extern void exits(const char*);
extern double frexp(double, int*);
extern uintptr getcallerpc(void);
extern char* getenv(const char*);
extern int getfields(char*, char**, int, int, const char*);
extern int gettokens(char *, char **, int, const char *);
extern char* getuser(void);
extern char* getwd(char*, int);
extern int iounit(int);
extern int32_t labs(int32_t);
extern double ldexp(double, int);
extern void longjmp(jmp_buf, int);
extern char* mktemp(char*);
extern double modf(double, double*);
extern void notejmp(void*, jmp_buf, int);
extern void perror(const char*);
extern int postnote(int, int, const char *);
extern double pow10(int);
extern int putenv(const char*, const char*);
extern void qsort(void*, int32_t, int32_t,
int (*)(const void*, const void*));
extern int setjmp(jmp_buf);
extern double strtod(const char*, const char**);
extern int32_t strtol(const char*, char**, int);
extern uint32_t strtoul(const char*, char**, int);
extern int64_t strtoll(const char*, char**, int);
extern uint64_t strtoull(const char*, char**, int);
extern void sysfatal(const char*, ...);
#pragma varargck argpos sysfatal 1
extern void syslog(int, const char*, const char*, ...);
#pragma varargck argpos syslog 3
extern int32_t time(int32_t*);
extern int tolower(int);
extern int toupper(int);
/*
* atomic
*/
int32_t ainc(int32_t*);
int32_t adec(int32_t*);
int cas32(uint32_t*, uint32_t, uint32_t);
int casp(void**, void*, void*);
int casl(uint32_t*, uint32_t, uint32_t);
/*
* synchronization
*/
typedef
struct Lock {
int32_t key;
int32_t sem;
} Lock;
extern int _tas(int*);
extern void lock(Lock*);
extern int lockt(Lock*, uint32_t);
extern void unlock(Lock*);
extern int canlock(Lock*);
typedef struct QLp QLp;
struct QLp
{
int inuse;
QLp *next;
char state;
};
typedef
struct QLock
{
Lock lock;
int locked;
QLp *head;
QLp *tail;
} QLock;
extern void qlock(QLock*);
extern int qlockt(QLock*, uint32_t);
extern void qunlock(QLock*);
extern int canqlock(QLock*);
extern void _qlockinit(void* (*)(void*, void*)); /* called only by the thread library */
typedef
struct RWLock
{
Lock lock;
int _readers; /* number of readers */
int writer; /* number of writers */
QLp *head; /* list of waiting processes */
QLp *tail;
} RWLock;
extern void rlock(RWLock*);
extern int rlockt(RWLock*, uint32_t);
extern void runlock(RWLock*);
extern int canrlock(RWLock*);
extern void wlock(RWLock*);
extern int wlockt(RWLock*, uint32_t);
extern void wunlock(RWLock*);
extern int canwlock(RWLock*);
typedef
struct Rendez
{
QLock *l;
QLp *head;
QLp *tail;
} Rendez;
extern void rsleep(Rendez*); /* unlocks r->l, sleeps, locks r->l again */
extern int rsleept(Rendez*, uint32_t); /* unlocks r->l, sleeps (up to ms), locks r->l again (if not timedout) */
extern int rwakeup(Rendez*);
extern int rwakeupall(Rendez*);
extern void** privalloc(void);
extern void privfree(void**);
/*
* network dialing
*/
#define NETPATHLEN 40
extern int accept(int, const char*);
extern int announce(const char*, char*);
extern int dial(const char*, const char*, char*, int*);
extern void setnetmtpt(char*, int, const char*);
extern int hangup(int);
extern int listen(const char*, char*);
extern char* netmkaddr(const char*, const char*, const char*);
extern int reject(int, const char*, const char*);
/*
* encryption
*/
extern int pushssl(int, const char*, const char*, const char*, int*);
extern int pushtls(int, const char*, const char*, int, const char*,
char*);
/*
* network services
*/
typedef struct NetConnInfo NetConnInfo;
struct NetConnInfo
{
char *dir; /* connection directory */
char *root; /* network root */
char *spec; /* binding spec */
char *lsys; /* local system */
char *lserv; /* local service */
char *rsys; /* remote system */
char *rserv; /* remote service */
char *laddr; /* local address */
char *raddr; /* remote address */
};
extern NetConnInfo* getnetconninfo(const char*, int);
extern void freenetconninfo(NetConnInfo*);
/*
* system calls
*
*/
#define STATMAX 65535U /* max length of machine-independent stat structure */
#define DIRMAX (sizeof(Dir)+STATMAX) /* max length of Dir structure */
#define ERRMAX 128 /* max length of error string */
#define MORDER 0x0003 /* mask for bits defining order of mounting */
#define MREPL 0x0000 /* mount replaces object */
#define MBEFORE 0x0001 /* mount goes before others in union directory */
#define MAFTER 0x0002 /* mount goes after others in union directory */
#define MCREATE 0x0004 /* permit creation in mounted directory */
#define MCACHE 0x0010 /* cache some data */
#define MMASK 0x0017 /* all bits on */
#define OREAD 0 /* open for read */
#define OWRITE 1 /* write */
#define ORDWR 2 /* read and write */
#define OEXEC 3 /* execute, == read but check execute permission */
#define OTRUNC 16 /* or'ed in (except for exec), truncate file first */
#define OCEXEC 32 /* or'ed in, close on exec */
#define ORCLOSE 64 /* or'ed in, remove on close */
#define OEXCL 0x1000 /* or'ed in, exclusive use (create only) */
// #define OBEHIND 0x2000 /* use write behind for writes [for 9n] */
#define AEXIST 0 /* accessible: exists */
#define AEXEC 1 /* execute access */
#define AWRITE 2 /* write access */
#define AREAD 4 /* read access */
/* Segattch */
#define SG_RONLY 0040 /* read only */
#define SG_CEXEC 0100 /* detach on exec */
#define NCONT 0 /* continue after note */
#define NDFLT 1 /* terminate after note */
#define NSAVE 2 /* clear note but hold state */
#define NRSTR 3 /* restore saved state */
/* bits in Qid.type */
#define QTDIR 0x80 /* type bit for directories */
#define QTAPPEND 0x40 /* type bit for append only files */
#define QTEXCL 0x20 /* type bit for exclusive use files */
#define QTMOUNT 0x10 /* type bit for mounted channel */
#define QTAUTH 0x08 /* type bit for authentication file */
#define QTTMP 0x04 /* type bit for not-backed-up file */
#define QTFILE 0x00 /* plain file */
/* bits in Dir.mode */
#define DMDIR 0x80000000 /* mode bit for directories */
#define DMAPPEND 0x40000000 /* mode bit for append only files */
#define DMEXCL 0x20000000 /* mode bit for exclusive use files */
#define DMMOUNT 0x10000000 /* mode bit for mounted channel */
#define DMAUTH 0x08000000 /* mode bit for authentication file */
#define DMTMP 0x04000000 /* mode bit for non-backed-up files */
#define DMREAD 0x4 /* mode bit for read permission */
#define DMWRITE 0x2 /* mode bit for write permission */
#define DMEXEC 0x1 /* mode bit for execute permission */
/* rfork */
enum
{
RFNAMEG = (1<<0),
RFENVG = (1<<1),
RFFDG = (1<<2),
RFNOTEG = (1<<3),
RFPROC = (1<<4),
RFMEM = (1<<5),
RFNOWAIT = (1<<6),
RFCNAMEG = (1<<10),
RFCENVG = (1<<11),
RFCFDG = (1<<12),
RFREND = (1<<13),
RFNOMNT = (1<<14)
};
typedef
struct Qid
{
uint64_t path;
uint32_t vers;
uint8_t type;
} Qid;
typedef
struct Dir {
/* system-modified data */
uint16_t type; /* server type */
uint dev; /* server subtype */
/* file data */
Qid qid; /* unique id from server */
uint32_t mode; /* permissions */
uint32_t atime; /* last read time */
uint32_t mtime; /* last write time */
int64_t length; /* file length */
char *name; /* last element of path */
char *uid; /* owner name */
char *gid; /* group name */
char *muid; /* last modifier name */
} Dir;
/* keep /sys/src/ape/lib/ap/plan9/sys9.h in sync with this -rsc */
typedef
struct Waitmsg
{
int pid; /* of loved one */
uint32_t time[3]; /* of loved one & descendants */
char *msg;
} Waitmsg;
typedef
struct IOchunk
{
void *addr;
uint32_t len;
} IOchunk;
extern void _exits(const char*);
extern int access(const char*, int);
extern int64_t alarm(uint64_t);
extern int await(char*, int);
extern int64_t awake(int64_t);
extern int awakened(int64_t);
extern int bind(const char*, const char*, int);
extern int brk(void*);
extern int chdir(const char*);
extern int close(int);
extern int create(const char*, int, uint32_t);
extern int dup(int, int);
extern int errstr(char*, uint);
extern int exec(const char*, char* const[]);
extern int execl(const char*, ...);
extern int forgivewkp(int64_t);
extern int fork(void);
extern int rfork(int);
extern int fauth(int, const char*);
extern int fstat(int, uint8_t*, int);
extern int fwstat(int, uint8_t*, int);
extern int fversion(int, int, char*, int);
extern int mount(int, int, const char*, int, const char*, int);
extern int unmount(const char*, const char*);
extern int noted(int);
extern int notify(void(*)(void*, char*));
extern int open(const char*, int);
extern int fd2path(int, char*, int);
// extern int fdflush(int);
extern int pipe(int*);
extern int32_t pread(int, void*, int32_t, int64_t);
extern int32_t preadv(int, IOchunk*, int, int64_t);
extern int32_t pwrite(int, const void*, int32_t, int64_t);
extern int32_t pwritev(int, IOchunk*, int, int64_t);
extern int32_t read(int, void*, int32_t);
extern int32_t readn(int, void*, int32_t);
extern int32_t readv(int, IOchunk*, int);
extern int remove(const char*);
extern void* sbrk(uint32_t);
extern int32_t oseek(int, int32_t, int);
extern int64_t seek(int, int64_t, int);
extern void* segattach(int, const char*, void*, uint32_t);
extern void* segbrk(void*, void*);
extern int segdetach(void*);
extern int segflush(void*, uint32_t);
extern int segfree(void*, uint32_t);
extern int semacquire(int32_t*, int);
extern int32_t semrelease(int32_t*, int32_t);
extern void sleep(int32_t);
extern int stat(const char*, uint8_t*, int);
extern int tsemacquire(int32_t*, uint64_t);
extern Waitmsg* wait(void);
extern int waitpid(void);
extern int32_t write(int, const void*, int32_t);
extern int32_t writev(int, IOchunk*, int);
extern int wstat(const char*, uint8_t*, int);
extern void* rendezvous(void*, void*);
extern Dir* dirstat(const char*);
extern Dir* dirfstat(int);
extern int dirwstat(const char*, Dir*);
extern int dirfwstat(int, Dir*);
extern int32_t dirread(int, Dir**);
extern void nulldir(Dir*);
extern int32_t dirreadall(int, Dir**);
extern int getpid(void);
extern int getppid(void);
extern void rerrstr(char*, uint);
extern char* sysname(void);
extern void werrstr(const char*, ...);
#pragma varargck argpos werrstr 1
/* compiler directives on plan 9 */
#define SET(x) ((x)=0)
#define USED(x) if(x){}else{}
#ifdef __GNUC__
# if __GNUC__ >= 3
# undef USED
# define USED(x) ((void)(x))
# endif
#endif
extern char *argv0;
/* #define ARGBEGIN for((argv0||(argv0=*argv)),argv++,argc--;\ */
#define ARGBEGIN for((argv0?0:(argv0=*argv)),argv++,argc--;\
argv[0] && argv[0][0]=='-' && argv[0][1];\
argc--, argv++) {\
char *_args, *_argt;\
Rune _argc;\
_args = &argv[0][1];\
if(_args[0]=='-' && _args[1]==0){\
argc--; argv++; break;\
}\
_argc = 0;\
while(*_args && (_args += chartorune(&_argc, _args)))\
switch(_argc)
/* #define ARGEND SET(_argt);USED(_argt,_argc,_args);}USED(argv, argc); */
#define ARGEND SET(_argt);USED(_argt);USED(_argc);USED(_args);}USED(argv);USED(argc);
#define ARGF() (_argt=_args, _args="",\
(*_argt? _argt: argv[1]? (argc--, *++argv): 0))
#define EARGF(x) (_argt=_args, _args="",\
(*_argt? _argt: argv[1]? (argc--, *++argv): ((x), argc = *(int*)0, (char*)0)))
#define ARGC() _argc
/* this is used by sbrk and brk, it's a really bad idea to redefine it */
extern char end[];
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