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jehanne/sys/include/libc.h

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/*
* Copyright (C) 2015-2017 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/lib/c"
#define JEHANNE_LIBC /* only for native code */
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
#define offsetof(s, m) (uintptr_t)(&(((s*)0)->m))
#define assert(x) if(x){}else jehanne__assert(#x)
extern void (*_abort)(void);
#define abort() if(_abort){_abort();}else{while(*(int*)0);}
/*
* mem routines
*/
extern void* jehanne_memccpy(void*, const void*, int, uint32_t);
extern void* jehanne_memset(void*, int, uint32_t);
extern int jehanne_memcmp(const void*, const void*, uint32_t);
extern void* jehanne_memcpy(void*, const void*, size_t);
extern void* jehanne_memmove(void*, const void*, size_t);
extern void* jehanne_memchr(const void*, int, uint32_t);
/*
* string routines
*/
extern char* jehanne_strcat(char*, const char*);
extern char* jehanne_strchr(const char*, int);
extern int jehanne_strcmp(const char*, const char*);
extern char* jehanne_strcpy(char*, const char*);
extern char* jehanne_strecpy(char*, char *, const char*);
extern char* jehanne_strdup(const char*);
extern char* jehanne_strncat(char*, const char*, int32_t);
extern char* jehanne_strncpy(char*, const char*, uint32_t);
extern int jehanne_strncmp(const char*, const char*, int32_t);
extern char* jehanne_strpbrk(const char*, const char*);
extern char* jehanne_strrchr(const char*, int);
extern char* jehanne_strtok(char*, char*);
extern int jehanne_strlen(const char*);
extern int32_t jehanne_strspn(const char*, const char*);
extern int32_t jehanne_strcspn(const char*, const char*);
extern char* jehanne_strstr(const char*, const char*);
extern int jehanne_cistrncmp(const char*, const char*, int);
extern int jehanne_cistrcmp(const char*, const char*);
extern char* jehanne_cistrstr(const char*, const char*);
extern int jehanne_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 jehanne_runetochar(char*, const Rune*);
extern int jehanne_chartorune(Rune*, const char*);
extern int jehanne_runelen(Rune);
extern int jehanne_runenlen(const Rune*, int);
extern int jehanne_fullrune(const char*, int);
extern int jehanne_utflen(const char*);
extern int jehanne_utfnlen(const char*, int32_t);
extern char* jehanne_utfrune(const char*, Rune);
extern char* jehanne_utfrrune(const char*, Rune);
extern char* jehanne_utfutf(const char*, const char*);
extern char* jehanne_utfecpy(char*, char *, const char*);
extern Rune* jehanne_runestrcat(Rune*, const Rune*);
extern Rune* jehanne_runestrchr(const Rune*, Rune);
extern int jehanne_runestrcmp(const Rune*, const Rune*);
extern Rune* jehanne_runestrcpy(Rune*, const Rune*);
extern Rune* jehanne_runestrncpy(Rune*, const Rune*, int32_t);
extern Rune* jehanne_runestrecpy(Rune*, Rune*, const Rune*);
extern Rune* jehanne_runestrdup(const Rune*);
extern Rune* jehanne_runestrncat(Rune*, const Rune*, int32_t);
extern int jehanne_runestrncmp(const Rune*, const Rune*, int32_t);
extern Rune* jehanne_runestrrchr(const Rune*, Rune);
extern int32_t jehanne_runestrlen(const Rune*);
extern Rune* jehanne_runestrstr(const Rune*, const Rune*);
extern Rune jehanne_tolowerrune(Rune);
extern Rune jehanne_totitlerune(Rune);
extern Rune jehanne_toupperrune(Rune);
extern Rune jehanne_tobaserune(Rune);
extern int jehanne_isalpharune(Rune);
extern int jehanne_isbaserune(Rune);
extern int jehanne_isdigitrune(Rune);
extern int jehanne_islowerrune(Rune);
extern int jehanne_isspacerune(Rune);
extern int jehanne_istitlerune(Rune);
extern int jehanne_isupperrune(Rune);
/*
* malloc
*/
extern void* jehanne_malloc(size_t);
extern void* jehanne_mallocz(uint32_t, int);
extern void jehanne_free(void*);
extern uint32_t jehanne_msize(void*);
extern void* jehanne_mallocalign(uint32_t, uint32_t, int32_t, uint32_t);
extern void* jehanne_calloc(uint32_t, size_t);
extern void* jehanne_realloc(void*, size_t);
void jehanne_setmalloctag(void*, uintptr_t);
void jehanne_setrealloctag(void*, uintptr_t);
uintptr_t jehanne_getmalloctag(void*);
uintptr_t jehanne_getrealloctag(void*);
void* jehanne_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 jehanne_print(const char*, ...);
extern char* jehanne_seprint(char*, char*, const char*, ...);
extern char* jehanne_vseprint(char*, char*, const char*, va_list);
extern int jehanne_snprint(char*, int, const char*, ...);
extern int jehanne_vsnprint(char*, int, const char*, va_list);
extern char* jehanne_smprint(const char*, ...);
extern char* jehanne_vsmprint(const char*, va_list);
extern int jehanne_sprint(char*, const char*, ...);
extern int jehanne_fprint(int, const char*, ...);
extern int jehanne_vfprint(int, const char*, va_list);
extern int jehanne_runesprint(Rune*, const char*, ...);
extern int jehanne_runesnprint(Rune*, int, const char*, ...);
extern int jehanne_runevsnprint(Rune*, int, const char*, va_list);
extern Rune* jehanne_runeseprint(Rune*, Rune*, const char*, ...);
extern Rune* jehanne_runevseprint(Rune*, Rune*, const char*, va_list);
extern Rune* jehanne_runesmprint(const char*, ...);
extern Rune* jehanne_runevsmprint(const char*, va_list);
extern int jehanne_fmtfdinit(Fmt*, int, char*, int);
extern int jehanne_fmtfdflush(Fmt*);
extern int jehanne_fmtstrinit(Fmt*);
extern char* jehanne_fmtstrflush(Fmt*);
extern int jehanne_runefmtstrinit(Fmt*);
extern Rune* jehanne_runefmtstrflush(Fmt*);
extern int jehanne_fmtinstall(int, int (*)(Fmt*));
extern int jehanne_dofmt(Fmt*, const char*);
extern int jehanne_dorfmt(Fmt*, const Rune*);
extern int jehanne_fmtprint(Fmt*, const char*, ...);
extern int jehanne_fmtvprint(Fmt*, const char*, va_list);
extern int jehanne_fmtrune(Fmt*, int);
extern int jehanne_fmtstrcpy(Fmt*, const char*);
extern int jehanne_fmtrunestrcpy(Fmt*, const Rune*);
/*
* error string for %r
* supplied on per os basis, not part of fmt library
*/
extern int jehanne_errfmt(Fmt *f);
/*
* quoted strings
*/
extern char *jehanne_unquotestrdup(const char*);
extern Rune *jehanne_unquoterunestrdup(const Rune*);
extern char *jehanne_quotestrdup(const char*);
extern Rune *jehanne_quoterunestrdup(const Rune*);
extern int jehanne_quotestrfmt(Fmt*);
extern int jehanne_quoterunestrfmt(Fmt*);
extern void jehanne_quotefmtinstall(void);
extern int (*doquote)(int);
extern int jehanne_needsrcquote(int);
/*
* random number
*/
extern void jehanne_srand(int32_t);
extern int jehanne_rand(void);
extern int jehanne_nrand(int);
extern int32_t jehanne_lrand(void);
extern int32_t jehanne_lnrand(int32_t);
extern double jehanne_frand(void);
extern uint32_t jehanne_truerand(void); /* uses /dev/random */
extern uint32_t jehanne_ntruerand(uint32_t); /* uses /dev/random */
/*
* math
*/
extern uint32_t jehanne_getfcr(void);
extern void jehanne_setfsr(uint32_t);
extern uint32_t getfsr(void);
extern void jehanne_setfcr(uint32_t);
extern double jehanne_NaN(void);
extern double jehanne_Inf(int);
extern int jehanne_isNaN(double);
extern int jehanne_isInf(double, int);
extern uint32_t jehanne_umuldiv(uint32_t, uint32_t, uint32_t);
extern int32_t jehanne_muldiv(int32_t, int32_t, int32_t);
extern double jehanne_pow(double, double);
extern double jehanne_atan2(double, double);
extern double jehanne_fabs(double);
extern double jehanne_atan(double);
extern double jehanne_log(double);
extern double jehanne_log10(double);
extern double jehanne_exp(double);
extern double jehanne_floor(double);
extern double jehanne_ceil(double);
extern double jehanne_hypot(double, double);
extern double jehanne_sin(double);
extern double jehanne_cos(double);
extern double jehanne_tan(double);
extern double jehanne_asin(double);
extern double jehanne_acos(double);
extern double jehanne_sinh(double);
extern double jehanne_cosh(double);
extern double jehanne_tanh(double);
extern double jehanne_sqrt(double);
extern double jehanne_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* jehanne_gmtime(int32_t);
extern Tm* jehanne_localtime(int32_t);
extern char* jehanne_asctime(Tm*);
extern char* jehanne_ctime(int32_t);
extern double jehanne_cputime(void);
extern int32_t jehanne_times(int32_t*);
extern int32_t jehanne_tm2sec(Tm*);
//extern int64_t jehanne_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 jehanne__assert(const char*) __attribute__ ((noreturn));
extern int jehanne_abs(int);
extern int jehanne_atexit(void(*)(void));
extern void jehanne_atexitdont(void(*)(void));
extern int jehanne_atnotify(int(*)(void*, char*), int);
extern double jehanne_atof(const char*);
extern int jehanne_atoi(const char*);
extern int32_t jehanne_atol(const char*);
extern int64_t jehanne_atoll(const char*);
extern double jehanne_charstod(int(*)(void*), void*);
extern int jehanne_chdir(const char *dirname);
extern char* jehanne_cleanname(char*);
extern int decrypt(void*, void*, int);
extern int encrypt(void*, void*, int);
extern int jehanne_dec64(uint8_t*, int, const char*, int);
extern int jehanne_enc64(char*, int, const uint8_t*, int);
extern int jehanne_dec32(uint8_t*, int, const char*, int);
extern int jehanne_enc32(char*, int, const uint8_t*, int);
extern int jehanne_dec16(uint8_t*, int, const char*, int);
extern int jehanne_enc16(char*, int, const uint8_t*, int);
extern int jehanne_encodefmt(Fmt*);
extern void jehanne_exits(const char*) __attribute__ ((noreturn));
extern double jehanne_frexp(double, int*);
extern uintptr_t jehanne_getcallerpc(void);
extern char* jehanne_getenv(const char*);
extern int jehanne_getfields(char*, char**, int, int, const char*);
extern int jehanne_gettokens(char *, char **, int, const char *);
extern char* jehanne_getuser(void);
extern long jehanne_getwd(char*, int);
extern int jehanne_iounit(int);
extern int32_t jehanne_labs(int32_t);
extern double jehanne_ldexp(double, int);
extern void jehanne_longjmp(jmp_buf, int);
extern char* jehanne_mktemp(char*);
extern double jehanne_modf(double, double*);
extern void jehanne_notejmp(void*, jmp_buf, int);
extern unsigned long jehanne_nsec(void);
extern int jehanne_dup(int oldfd, int newfd);
extern int jehanne_ocreate(const char* path, unsigned int omode, unsigned int perm);
extern void jehanne_perror(const char*);
extern int jehanne_pipe(int pipes[2]);
extern int jehanne_postnote(int, int, const char *);
extern double jehanne_pow10(int);
extern int jehanne_putenv(const char*, const char*);
extern void jehanne_qsort(void*, long, int,
int (*)(const void*, const void*));
extern void* jehanne_bsearch(const void* key, const void* base, size_t nmemb, size_t size,
int (*compar)(const void*, const void*));
extern int jehanne_setjmp(jmp_buf);
extern double jehanne_strtod(const char*, const char**);
extern int32_t jehanne_strtol(const char*, char**, int);
extern uint32_t jehanne_strtoul(const char*, char**, int);
extern int64_t jehanne_strtoll(const char*, char**, int);
extern uint64_t jehanne_strtoull(const char*, char**, int);
extern void jehanne_sysfatal(const char*, ...) __attribute__ ((noreturn));
extern void jehanne_syslog(int, const char*, const char*, ...);
extern int32_t jehanne_time(int32_t*);
extern int jehanne_tolower(int);
extern int jehanne_toupper(int);
/*
* atomic
*/
int32_t jehanne_ainc(int32_t*);
int32_t jehanne_adec(int32_t*);
#define cas(ptr, oldval, newval) __sync_bool_compare_and_swap(ptr, oldval, newval)
#define casv(ptr, oldval, newval) __sync_val_compare_and_swap(ptr, oldval, newval)
/*
* synchronization
*/
typedef
struct Lock {
int32_t key;
int32_t sem;
} Lock;
extern int jehanne_tsemacquire(int* addr, long ms);
extern int jehanne__tas(int*);
extern void jehanne_lock(Lock*);
extern int jehanne_lockt(Lock*, uint32_t);
extern void jehanne_unlock(Lock*);
extern int jehanne_canlock(Lock*);
typedef struct QLp QLp;
struct QLp
{
uint8_t state;
QLp *next;
};
typedef
struct QLock
{
Lock lock;
int locked;
QLp *head;
QLp *tail;
} QLock;
extern void jehanne_qlock(QLock*);
extern int jehanne_qlockt(QLock*, uint32_t);
extern void jehanne_qunlock(QLock*);
extern int jehanne_canqlock(QLock*);
extern void jehanne__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 jehanne_rlock(RWLock*);
extern int jehanne_rlockt(RWLock*, uint32_t);
extern void jehanne_runlock(RWLock*);
extern int jehanne_canrlock(RWLock*);
extern void jehanne_wlock(RWLock*);
extern int jehanne_wlockt(RWLock*, uint32_t);
extern void jehanne_wunlock(RWLock*);
extern int jehanne_canwlock(RWLock*);
typedef
struct Rendez
{
QLock *l;
QLp *head;
QLp *tail;
} Rendez;
extern void jehanne_rsleep(Rendez*); /* unlocks r->l, sleeps, locks r->l again */
extern int jehanne_rsleept(Rendez*, uint32_t); /* unlocks r->l, sleeps (up to ms), locks r->l again (if not timedout) */
extern int jehanne_rwakeup(Rendez*);
extern int jehanne_rwakeupall(Rendez*);
extern void** jehanne_privalloc(void);
/*
* network dialing
*/
#define NETPATHLEN 40
extern int jehanne_accept(int, const char*);
extern int jehanne_announce(const char*, char*);
extern int jehanne_dial(const char*, const char*, char*, int*);
extern void jehanne_setnetmtpt(char*, int, const char*);
extern int jehanne_hangup(int);
extern int jehanne_listen(const char*, char*);
extern char* jehanne_netmkaddr(const char*, const char*, const char*);
extern int jehanne_reject(int, const char*, const char*);
/*
* encryption
*/
extern int jehanne_pushssl(int, const char*, const char*, const char*, int*);
//extern int jehanne_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* jehanne_getnetconninfo(const char*, int);
extern void jehanne_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 256 /* 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 */
/* Open modes: Kernel reserved flags */
#define OSTAT 0x00 /* open for stat/wstat */
#define OREAD 0x01 /* open for read */
#define OWRITE 0x02 /* write */
#define ORDWR (OREAD|OWRITE) /* read and write */
#define OEXEC 0x04 /* execute, == read but check execute permission */
#define OCEXEC 0x08 /* or'ed in, close on exec */
#define ORCLOSE 0x10 /* or'ed in, remove on close */
#define OKMODE 0xff /* least significant byte reserved for kernel use */
/* Open modes: Popular flags among filesystems */
#define OTRUNC 0x0100 /* or'ed in (except for exec), truncate file first */
/* Access modes */
#define AEXIST 0 /* accessible: exists */
#define AREAD 4 /* read ccess */
#define AWRITE 2 /* write access */
#define AEXEC 1 /* execute access */
#define AMASK (AEXIST|AREAD|AWRITE|AEXEC)
/* 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 */
uint32_t 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
{
pid_t pid; /* of loved one */
uint32_t time[3]; /* of loved one & descendants */
char msg[];
} Waitmsg;
extern int jehanne_access(const char*, int);
extern int jehanne_awakened(int64_t);
extern int jehanne_brk(void*);
extern int jehanne_execl(const char*, ...);
extern int jehanne_forgivewkp(int64_t);
extern pid_t jehanne_fork(void);
extern int32_t jehanne_readn(int, void*, int32_t);
extern void* jehanne_segbrk(uint32_t);
#define sbrk(incr) jehanne_segbrk(incr)
extern void* jehanne_segattach(int, const char*, void*, unsigned long);
extern int jehanne_segdetach(void*);
extern int jehanne_segfree(void*, unsigned long);
extern void jehanne_sleep(int32_t);
extern int jehanne_stat(const char*, uint8_t*, int);
extern Waitmsg* jehanne_wait(void);
extern int jehanne_waitpid(void);
extern int jehanne_wstat(const char*, uint8_t*, int);
extern Dir* jehanne_dirstat(const char*);
extern Dir* jehanne_dirfstat(int);
extern int jehanne_dirwstat(const char*, Dir*);
extern int jehanne_dirfwstat(int, Dir*);
extern int32_t jehanne_dirread(int, Dir**);
extern void jehanne_nulldir(Dir*);
extern int32_t jehanne_dirreadall(int, Dir**);
extern int32_t jehanne_getpid(void);
extern int32_t jehanne_getppid(void);
extern int32_t jehanne_getmainpid(void);
extern void jehanne_rerrstr(char*, uint32_t);
extern char* jehanne_sysname(void);
extern void jehanne_werrstr(const char*, ...);
extern unsigned int jehanne_convM2D(uint8_t*, uint, Dir*, char*);
extern unsigned int jehanne_convD2M(Dir*, uint8_t*, uint);
extern unsigned int jehanne_sizeD2M(Dir*);
extern int jehanne_dirmodefmt(Fmt*);
#ifndef NPRIVATES
# define NPRIVATES 16
#endif
/* 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 if(argv0==nil){\
argv0=*argv;\
}\
for(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 += jehanne_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 segbrk and brk, it's a really bad idea to redefine it */
extern char end[];
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