ref: 15d1425b276495a82621a8d075176a59a512cdf3
dir: /sys/src/ape/cmd/pdksh/shf.h/
#ifndef SHF_H # define SHF_H /* * Shell file I/O routines */ /* $Id$ */ #define SHF_BSIZE 512 #define shf_fileno(shf) ((shf)->fd) #define shf_setfileno(shf,nfd) ((shf)->fd = (nfd)) #define shf_getc(shf) ((shf)->rnleft > 0 ? (shf)->rnleft--, *(shf)->rp++ : \ shf_getchar(shf)) #define shf_putc(c, shf) ((shf)->wnleft == 0 ? shf_putchar((c), (shf)) \ : ((shf)->wnleft--, *(shf)->wp++ = (c))) #define shf_eof(shf) ((shf)->flags & SHF_EOF) #define shf_error(shf) ((shf)->flags & SHF_ERROR) #define shf_errno(shf) ((shf)->errno_) #define shf_clearerr(shf) ((shf)->flags &= ~(SHF_EOF | SHF_ERROR)) /* Flags passed to shf_*open() */ #define SHF_RD 0x0001 #define SHF_WR 0x0002 #define SHF_RDWR (SHF_RD|SHF_WR) #define SHF_ACCMODE 0x0003 /* mask */ #define SHF_GETFL 0x0004 /* use fcntl() to figure RD/WR flags */ #define SHF_UNBUF 0x0008 /* unbuffered I/O */ #define SHF_CLEXEC 0x0010 /* set close on exec flag */ #define SHF_MAPHI 0x0020 /* make fd > FDBASE (and close orig) * (shf_open() only) */ #define SHF_DYNAMIC 0x0040 /* string: increase buffer as needed */ #define SHF_INTERRUPT 0x0080 /* EINTR in read/write causes error */ /* Flags used internally */ #define SHF_STRING 0x0100 /* a string, not a file */ #define SHF_ALLOCS 0x0200 /* shf and shf->buf were alloc()ed */ #define SHF_ALLOCB 0x0400 /* shf->buf was alloc()ed */ #define SHF_ERROR 0x0800 /* read()/write() error */ #define SHF_EOF 0x1000 /* read eof (sticky) */ #define SHF_READING 0x2000 /* currently reading: rnleft,rp valid */ #define SHF_WRITING 0x4000 /* currently writing: wnleft,wp valid */ struct shf { int flags; /* see SHF_* */ unsigned char *rp; /* read: current position in buffer */ int rbsize; /* size of buffer (1 if SHF_UNBUF) */ int rnleft; /* read: how much data left in buffer */ unsigned char *wp; /* write: current position in buffer */ int wbsize; /* size of buffer (0 if SHF_UNBUF) */ int wnleft; /* write: how much space left in buffer */ unsigned char *buf; /* buffer */ int fd; /* file descriptor */ int errno_; /* saved value of errno after error */ int bsize; /* actual size of buf */ Area *areap; /* area shf/buf were allocated in */ }; extern struct shf shf_iob[]; struct shf *shf_open ARGS((const char *name, int oflags, int mode, int sflags)); struct shf *shf_fdopen ARGS((int fd, int sflags, struct shf *shf)); struct shf *shf_reopen ARGS((int fd, int sflags, struct shf *shf)); struct shf *shf_sopen ARGS((char *buf, int bsize, int sflags, struct shf *shf)); int shf_close ARGS((struct shf *shf)); int shf_fdclose ARGS((struct shf *shf)); char *shf_sclose ARGS((struct shf *shf)); int shf_finish ARGS((struct shf *shf)); int shf_flush ARGS((struct shf *shf)); int shf_seek ARGS((struct shf *shf, off_t where, int from)); int shf_read ARGS((char *buf, int bsize, struct shf *shf)); char *shf_getse ARGS((char *buf, int bsize, struct shf *shf)); int shf_getchar ARGS((struct shf *shf)); int shf_ungetc ARGS((int c, struct shf *shf)); int shf_putchar ARGS((int c, struct shf *shf)); int shf_puts ARGS((const char *s, struct shf *shf)); int shf_write ARGS((const char *buf, int nbytes, struct shf *shf)); int shf_fprintf ARGS((struct shf *shf, const char *fmt, ...)); int shf_snprintf ARGS((char *buf, int bsize, const char *fmt, ...)); char *shf_smprintf ARGS((const char *fmt, ...)); int shf_vfprintf ARGS((struct shf *, const char *fmt, va_list args)); #endif /* SHF_H */