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go/include/libc.h
Russ Cox 6d888f1e1b build: clang support 
This works with at least one version of clang
that existed at one moment in time.
No guarantees about clangs past or future.

To try:
        CC=clang all.bash

It does not work with the Xcode clang,
because that clang fails at printing a useful answer
to:
        clang -print-libgcc-file-name
The clang that works prints a full path name for
that command, not just "libgcc.a".

Fixes #4713.

R=iant, minux.ma
CC=golang-dev
https://golang.org/cl/7323068
2013-02-15 13:37:43 -08:00

401 lines
12 KiB
C
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/*
Derived from Inferno include/kern.h and
Plan 9 from User Space include/libc.h
http://code.google.com/p/inferno-os/source/browse/include/kern.h
http://code.swtch.com/plan9port/src/tip/include/libc.h
Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved.
Portions Copyright © 2001-2007 Russ Cox. All rights reserved.
Portions Copyright © 2009 The Go Authors. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/*
* Lib9 is miscellany from the Plan 9 C library that doesn't
* fit into libutf or into libfmt, but is still missing from traditional
* Unix C libraries.
*/
#ifndef _LIBC_H_
#define _LIBC_H_ 1
#if defined(__cplusplus)
extern "C" {
#endif
#include <utf.h>
#include <fmt.h>
/*
* Begin trimmed down usual libc.h
*/
#ifndef nil
#define nil ((void*)0)
#endif
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
#ifndef offsetof
#define offsetof(s, m) (ulong)(&(((s*)0)->m))
#endif
extern char* strecpy(char*, char*, char*);
extern int tokenize(char*, char**, int);
extern double p9cputime(void);
#ifndef NOPLAN9DEFINES
#define cputime p9cputime
#endif
/*
* one-of-a-kind
*/
enum
{
PNPROC = 1,
PNGROUP = 2
};
int isInf(double, int);
extern int p9atoi(char*);
extern long p9atol(char*);
extern vlong p9atoll(char*);
extern double fmtcharstod(int(*)(void*), void*);
extern char* cleanname(char*);
extern int exitcode(char*);
extern void exits(char*);
extern double frexp(double, int*);
extern char* p9getenv(char*);
extern int p9putenv(char*, char*);
extern int getfields(char*, char**, int, int, char*);
extern int gettokens(char *, char **, int, char *);
extern char* p9getwd(char*, int);
extern void p9longjmp(p9jmp_buf, int);
extern void p9notejmp(void*, p9jmp_buf, int);
extern void perror(const char*);
extern int postnote(int, int, char *);
extern double p9pow10(int);
extern char* p9ctime(long);
#define p9setjmp(b) sigsetjmp((void*)(b), 1)
extern void sysfatal(char*, ...);
#ifndef NOPLAN9DEFINES
#define atoi p9atoi
#define atol p9atol
#define atoll p9atoll
#define getenv p9getenv
#define getwd p9getwd
#define longjmp p9longjmp
#undef setjmp
#define setjmp p9setjmp
#define putenv p9putenv
#define notejmp p9notejmp
#define jmp_buf p9jmp_buf
#define pow10 p9pow10
#undef strtod
#define strtod fmtstrtod
#define charstod fmtcharstod
#define ctime p9ctime
#endif
/*
* 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 ORCLOSE 64 /* or'ed in, remove on close */
#define ODIRECT 128 /* or'ed in, direct access */
#define OEXCL 0x1000 /* or'ed in, exclusive use (create only) */
#define OAPPEND 0x4000 /* or'ed in, append only */
#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 non-backed-up file */
#define QTSYMLINK 0x02 /* type bit for symbolic link */
#define QTFILE 0x00 /* type bits for 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 file */
#define DMSYMLINK 0x02000000 /* mode bit for symbolic link (Unix, 9P2000.u) */
#define DMDEVICE 0x00800000 /* mode bit for device file (Unix, 9P2000.u) */
#define DMNAMEDPIPE 0x00200000 /* mode bit for named pipe (Unix, 9P2000.u) */
#define DMSOCKET 0x00100000 /* mode bit for socket (Unix, 9P2000.u) */
#define DMSETUID 0x00080000 /* mode bit for setuid (Unix, 9P2000.u) */
#define DMSETGID 0x00040000 /* mode bit for setgid (Unix, 9P2000.u) */
#define DMREAD 0x4 /* mode bit for read permission */
#define DMWRITE 0x2 /* mode bit for write permission */
#define DMEXEC 0x1 /* mode bit for execute permission */
#ifdef RFMEM /* FreeBSD, OpenBSD, NetBSD */
#undef RFFDG
#undef RFNOTEG
#undef RFPROC
#undef RFMEM
#undef RFNOWAIT
#undef RFCFDG
#undef RFNAMEG
#undef RFENVG
#undef RFCENVG
#undef RFCFDG
#undef RFCNAMEG
#endif
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
{
uvlong path;
ulong vers;
uchar type;
} Qid;
typedef
struct Dir {
/* system-modified data */
ushort type; /* server type */
uint dev; /* server subtype */
/* file data */
Qid qid; /* unique id from server */
ulong mode; /* permissions */
ulong atime; /* last read time */
ulong mtime; /* last write time */
vlong length; /* file length */
char *name; /* last element of path */
char *uid; /* owner name */
char *gid; /* group name */
char *muid; /* last modifier name */
/* 9P2000.u extensions */
uint uidnum; /* numeric uid */
uint gidnum; /* numeric gid */
uint muidnum; /* numeric muid */
char *ext; /* extended info */
} Dir;
typedef
struct Waitmsg
{
int pid; /* of loved one */
ulong time[3]; /* of loved one & descendants */
char *msg;
} Waitmsg;
extern void _exits(char*);
extern void abort(void);
extern long p9alarm(ulong);
extern int await(char*, int);
extern int awaitfor(int, char*, int);
extern int awaitnohang(char*, int);
extern int p9chdir(char*);
extern int close(int);
extern int p9create(char*, int, ulong);
extern int p9dup(int, int);
extern int errstr(char*, uint);
extern int p9exec(char*, char*[]);
extern int p9execl(char*, ...);
extern int p9rfork(int);
extern int noted(int);
extern int notify(void(*)(void*, char*));
extern int noteenable(char*);
extern int notedisable(char*);
extern int notifyon(char*);
extern int notifyoff(char*);
extern int p9open(char*, int);
extern int fd2path(int, char*, int);
extern long readn(int, void*, long);
extern int remove(const char*);
extern vlong p9seek(int, vlong, int);
extern int p9sleep(long);
extern Waitmsg* p9wait(void);
extern Waitmsg* p9waitfor(int);
extern Waitmsg* waitnohang(void);
extern int p9waitpid(void);
extern ulong rendezvous(ulong, ulong);
extern char* getgoos(void);
extern char* getgoarch(void);
extern char* getgoroot(void);
extern char* getgoversion(void);
extern char* getgoarm(void);
extern char* getgo386(void);
extern void flagcount(char*, char*, int*);
extern void flagint32(char*, char*, int32*);
extern void flagint64(char*, char*, int64*);
extern void flagstr(char*, char*, char**);
extern void flagparse(int*, char***, void (*usage)(void));
extern void flagfn0(char*, char*, void(*fn)(void));
extern void flagfn1(char*, char*, void(*fn)(char*));
extern void flagfn2(char*, char*, void(*fn)(char*, char*));
extern void flagprint(int);
#ifdef _WIN32
#ifndef _WIN64
struct timespec {
int tv_sec;
long tv_nsec;
};
#define execv(prog, argv) execv(prog, (const char* const*)(argv))
#define execvp(prog, argv) execvp(prog, (const char**)(argv))
#endif
extern int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
extern int fork(void);
extern int pread(int fd, void *buf, int n, int off);
extern int pwrite(int fd, void *buf, int n, int off);
#undef getwd
#define getwd(s, ns) getcwd(s, ns)
#undef lseek
#define lseek(fd, n, base) _lseeki64(fd, n, base)
#define mkdir(path, perm) mkdir(path)
#define pipe(fd) _pipe(fd, 512, O_BINARY)
#else
#define O_BINARY 0
#endif
#ifndef NOPLAN9DEFINES
#define alarm p9alarm
#define dup p9dup
#define exec p9exec
#define execl p9execl
#define seek p9seek
#define sleep p9sleep
#define wait p9wait
#define waitpid p9waitpid
#define rfork p9rfork
#define create p9create
#undef open
#define open p9open
#define waitfor p9waitfor
#endif
extern Dir* dirstat(char*);
extern Dir* dirfstat(int);
extern int dirwstat(char*, Dir*);
extern int dirfwstat(int, Dir*);
extern void nulldir(Dir*);
extern long dirreadall(int, Dir**);
extern void rerrstr(char*, uint);
extern char* sysname(void);
extern void werrstr(char*, ...);
extern char* getns(void);
extern char* get9root(void);
extern char* unsharp(char*);
/* external names that we don't want to step on */
#ifndef NOPLAN9DEFINES
#define main p9main
#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
/* command line */
extern char *argv0;
extern void __fixargv0(void);
#define ARGBEGIN for((void)(argv0?0:(argv0=(__fixargv0(),*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);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), abort(), (char*)0)))
#define ARGC() _argc
#if defined(__cplusplus)
}
#endif
#endif /* _LIB9_H_ */
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